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Difference between revisions of "O-Saft/Documentation"

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(--host=HOST --port=PORT HOST:PORT HOST)
(--trace-sub +traceSUB: removed)
 
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Line 36: Line 36:
 
:      All  commands  and  options  can also be specified in a  rc-file, see
 
:      All  commands  and  options  can also be specified in a  rc-file, see
 
:      [[#RC-FILE|RC-FILE]]  below.
 
:      [[#RC-FILE|RC-FILE]]  below.
 +
 +
:      I.g. all commands start with a  <code>+</code>  character and options start with 
 +
:      <code>-</code>  or  <code>--</code>  characters. Anything else is treated as target name.
  
 
====QUICKSTART====
 
====QUICKSTART====
Line 46: Line 49:
 
:*      Show supported (enabled) ciphers with their DH parameters:
 
:*      Show supported (enabled) ciphers with their DH parameters:
 
     o-saft.pl +cipher-dh example.tld
 
     o-saft.pl +cipher-dh example.tld
 +
 +
:* Test all ciphers, even if not supported by local SSL implementation:
 +
    o-saft.pl +cipherall example.tld
  
 
:*      Show details of certificate and connection of target:
 
:*      Show details of certificate and connection of target:
Line 67: Line 73:
 
     o-saft.pl --help=examples
 
     o-saft.pl --help=examples
  
:*       List all available commands:
+
:* List all available commands:
 
     o-saft.pl --help=commands
 
     o-saft.pl --help=commands
  
Line 76: Line 82:
 
     o-saft.pl --help=SECURITY
 
     o-saft.pl --help=SECURITY
  
:*       Start the simple GUI
+
:* Show all  --help=*  commands
 +
    o-saft.pl --help=HELP
 +
 
 +
:* Search for text in O-Saft's help and show with context
 +
    o-saft -help=your-text
 +
 
 +
:* Start the simple GUI
 
     o-saft.tcl
 
     o-saft.tcl
 +
 +
:* Start the simple GUI which uses ''o-saft.pl'' in a Docker image
 +
    o-saft.tcl --docker
  
 
:      For more specialised test cases, refer to the [[#COMMANDS|COMMANDS]] and [[#OPTIONS|OPTIONS]]
 
:      For more specialised test cases, refer to the [[#COMMANDS|COMMANDS]] and [[#OPTIONS|OPTIONS]]
Line 85: Line 100:
  
 
==== WHY? ====
 
==== WHY? ====
:      Why a new tool for checking SSL security and configuration when there
+
:      Why a new tool for checking SSL security and configuration when there
:      are already a dozen or more such good tools in existence (circa 2012)?
+
:      are already a dozen or more such good tools in existence (in 2012)?
  
 
:      '''Unique features:'''
 
:      '''Unique features:'''
Line 113: Line 128:
  
 
:      For more, please see  [[#EXAMPLES|EXAMPLES]]  section below.
 
:      For more, please see  [[#EXAMPLES|EXAMPLES]]  section below.
 +
:      If it should run on systems with old software (perl or Perl modules), 
 +
:      please see  [[#DEBUG|DEBUG]]  section below.
  
 
==== SECURITY====
 
==== SECURITY====
Line 124: Line 141:
  
 
:Care should be taken, when additional tools and modules are installed
 
:Care should be taken, when additional tools and modules are installed
:as described in  [[#INSTALLATION|INSTALLATION]]  below. In particular we recommend to
+
:as described in  [[#INSTALLATION|INSTALLATION]]  below. In particular it is recommended
:do such installations into directoies specially prepared for use with
+
:to do these installations into directoies specially prepared for use
:<code>o-saft.pl</code> . No other tools of your system should use these installations
+
:with <code>o-saft.pl</code> . No other tools of your system should use these installations
 
:i.e. by accident or because your environment variables point to them.
 
:i.e. by accident or because your environment variables point to them.
  
Line 137: Line 154:
  
 
:'''DO NOT USE THESE INSTALLATIONS ON PRODUCTIVE SYTEMS.'''
 
:'''DO NOT USE THESE INSTALLATIONS ON PRODUCTIVE SYTEMS.'''
 +
 +
====CONCEPTS====
 +
 +
:The purpose of  O-Saft  is to do the work,  not to force the user  to
 +
:learn a new tool or to install "newer" software first.
 +
:However, the user "should do something" if necessary depending on the
 +
:reported results.
 +
 +
=====Results=====
 +
 +
:Results of checks are marked  <code>yes</code>  or <code>no</code>.  This leaves the proper
 +
:interpretation, if the result is "good" or "bad", to the user.
 +
:Background:  it is not always possible to rate a result as  "good" or
 +
:"bad" or "insecure" or whatever. That's why  O-Saft  can not give the
 +
:"the best" or a "proper" recommendation. In practice it depends on
 +
:the context what a recommendation or countermeasure should be. That's
 +
:why results are marked  <code>yes</code>  or  <code>no</code>  if considered "questionable"
 +
:or "not good" (for example according other checks).
 +
 +
:... more comming soon ...
  
 
==== TECHNICAL INFORMATION====
 
==== TECHNICAL INFORMATION====
Line 144: Line 181:
 
:computed directly.
 
:computed directly.
  
===== openssl, libssl, libcrypto =====
+
===== Version 19.11.19 and later=====
:In general the tool uses perl's  ''Net::SSLeay(1)'' module which itself
+
 
 +
:Starting with version 19.11.19 the  +cipher  command does not use any
 +
:external library. Checking for ciphers is done using plain Perl code.
 +
:Only other collected SSL/TLS related information requires an external
 +
:library, in general libssl.
 +
:The description about OpenSSL and libssl below  applies only if any of
 +
:to the options <code>--ciphermode=openssl</code>  or  <code>--siphermode=ssleay</code> are given
 +
:with the <code>+cipher</code> command.
 +
 
 +
:Therefore following commands and options changed:
 +
* <code>+cipher</code>    uses internal method
 +
* <code>+cipherall</code>  command obsolete, automatically changed to  <code>+cipher</code>
 +
* <code>+cipherraw</code>  command obsolete, automatically chnaged to  <code>+cipher</code>
 +
* <code>--openssl-ciphers</code>  <code>--force-openssl</code>  changed to  <code>--ciphermode=openssl</code>
 +
* <code>--openssl=TOOL</code>  TOOL only used for  <code>+cipher --ciphermode=openssl</code>
 +
* <code>--legacy=owasp</code>  option obsolete
 +
 
 +
:The commands  <code>+cipherall</code>  and  <code>+cipherraw</code>  are "converted" to the new
 +
:syntax, as follows:
 +
 
 +
  VERSION < 19.11.19          VERSION > 19.11.19
 +
  ----------------------------+-------------------------------
 +
  +cipher                      +cipher --ciphermode=ssleay
 +
  +cipher --force-openssl      +cipher --ciphermode=openssl
 +
  +cipherall                  +cipher
 +
  +cipherraw                  +cipher --ciphermode=intern
 +
  ----------------------------+-------------------------------
 +
 
 +
===== Version < 19.11.19=====
 +
 
 +
:Up to version 19.11.19 the default behaviour for the  <code>+cipher</code> command
 +
:was to use libssl. The commands  <code>+cipherall</code>  and  <code>+cipherraw</code>  did not
 +
:use any other library as described below.
 +
 
 +
===== OpenSSL, libssl, libcrypto =====
 +
:In general the tool uses Perl's  ''Net::SSLeay(3pm)'' module which itself
 
:is based on libssl and/or libssleay library of the operating system.
 
:is based on libssl and/or libssleay library of the operating system.
 
:It's possible to use other versions of these libraries, see options:
 
:It's possible to use other versions of these libraries, see options:
Line 159: Line 231:
 
:*  --openssl=TOOL
 
:*  --openssl=TOOL
 
:*  --no-openssl
 
:*  --no-openssl
:*  --force-openssl
+
:* --openssl-ciphers --force-openssl
 
:*  --exe-path=PATH --exe=PATH
 
:*  --exe-path=PATH --exe=PATH
 
+
:*  --openssl-cnf=PATH
:Above applies to all commands except ''+cipherall'' which uses no other
+
:*  --openssl-s_client --s_client
:libraries.
 
  
 
:OpenSSL is recommended to be used for libssl and libcrypto.  Versions
 
:OpenSSL is recommended to be used for libssl and libcrypto.  Versions
 
:0.9.8k to 1.0.2e (Jan. 2016) are known to work. However, versions be-
 
:0.9.8k to 1.0.2e (Jan. 2016) are known to work. However, versions be-
 
:for 1.0.0 may not provide all informations.
 
:for 1.0.0 may not provide all informations.
 +
:Some functionality (checks) of  O-Saft  may be missing or fail,  when
 +
:openssl versions 1.1.x are used (because functionality was removed).
 
:LibreSSL is not recommended, because  some functionallity  considered
 
:LibreSSL is not recommended, because  some functionallity  considered
 
:insecure, has been removed.
 
:insecure, has been removed.
Line 174: Line 247:
 
===== Certificates and CA=====
 
===== Certificates and CA=====
 
:All checks according the validity of the certificate chain  are based
 
:All checks according the validity of the certificate chain  are based
:on the root CAs installed on the system. NOTE that  ''Net::SSLeay(1)''
+
:on the root CAs installed on the system. Note that  ''Net::SSLeay(3pm)''
 
:and  ''openssl(1)''  may have their own rules how and where to find the
 
:and  ''openssl(1)''  may have their own rules how and where to find the
 
:root CAs.  Please refer to the documentation on your system for these
 
:root CAs.  Please refer to the documentation on your system for these
Line 204: Line 277:
 
:following modules (minimal version) is required:
 
:following modules (minimal version) is required:
  
:* IO             1.25 (2011)
+
:* IO             1.25 (2011)
:* IO::Socket:SSL 1.37 (2011)
+
:* IO::Socket:INET 1.37 (2011)
:* IO::Socket:SSL 1.90 (2013)  
+
:* IO::Socket:SSL 1.90 (2013)  
:* Net::DNS       0.66 (2011)
+
:* Net::DNS       0.66 (2011)
:* Net::SSLeay   1.49 (2012)
+
:* Net::SSLeay     1.49 (2012)
  
 
:However, it is recommended to use the most recent version of the mod-
 
:However, it is recommended to use the most recent version of the mod-
:ules which then gives more accurate results and less warnings.  Also
+
:ules which then gives more accurate results and less warnings. If the
:an ''openssl(1)'' executable should be available, but is not mandatory.
+
:modules are missing, they can be installed i.e. with:
 +
  cpan Net::SSLeay
 +
 
 +
:Note: if you want to use advanced features of openssl or Net::SSLeay,
 +
:please see  [[#INSTALLATION|INSTALLATION]] section how to compile and install the tools
 +
:fully customized.
 +
 
 +
:Also an ''openssl'' executable should be available, but is not mandatory.
  
 
:For checking DH parameters of ciphers, openssl 1.0.2  or newer should
 
:For checking DH parameters of ciphers, openssl 1.0.2  or newer should
 
:be available. If an older version of openssl is found, we try hard to
 
:be available. If an older version of openssl is found, we try hard to
:extract the DH parameters from the data returned by the server.
+
:extract the DH parameters from the data returned by the server, see
 +
:''+cipher-dh''  command.
 +
 
 +
:If you need to run on systems with older perl or Perl module versions
 +
:please refer to the  [[#DEBUG|DEBUG]]  section for more information.
  
 
==== RESULTS====
 
==== RESULTS====
  
  
:All output is designed to make be easily parsed by postprocessors. Please
+
:All output is designed to be easily parsed by postprocessors. Please
 
:see  [[#OUTPUT|OUTPUT]]  section below for details.
 
:see  [[#OUTPUT|OUTPUT]]  section below for details.
  
Line 250: Line 334:
 
:** all *NULL* ciphers
 
:** all *NULL* ciphers
 
:** all *RC4*  ciphers
 
:** all *RC4*  ciphers
:** all *EXPORT* ciphers
+
:** all *EXPORT* ciphers
 
:** all *anon* (aka ADH aka DHA) ciphers
 
:** all *anon* (aka ADH aka DHA) ciphers
 +
:** all *CBC* and *CBC3* (aka 3DES) ciphers
 
:* low:
 
:* low:
:** all *CBC*  ciphers
 
 
:* high:
 
:* high:
:** all *CBC3* (aka 3DES) ciphers
 
 
:** all *AES(128|256)* ciphers
 
:** all *AES(128|256)* ciphers
 
:** all *CAMELLIA* ciphers
 
:** all *CAMELLIA* ciphers
Line 300: Line 383:
 
: A list of all available commands will be printed with
 
: A list of all available commands will be printed with
  
     o-saft.pl --help=cmd
+
     o-saft.pl --help=cmds
  
 
: The description of all other commands will be printed with
 
: The description of all other commands will be printed with
Line 369: Line 452:
 
====== +quit======
 
====== +quit======
  
:Show internal data and exit, used for debugging only.
+
:Show internal data and exit, used for testing and debugging only.
 +
:Please see  [[#NTESTING|TESTING]]  below.
  
 
===== Commands to check SSL details=====
 
===== Commands to check SSL details=====
Line 380: Line 464:
 
====== +check======
 
====== +check======
  
:    Check the SSL connection for security issues. This is the same as
+
:    Check the SSL connection for security issues. Implies  ''+cipher'' .
:     ''+info +cipher +sizes --sslv2 --sslv3 --tlsv1 --tlsv11 --tlsv12''
+
 
:   but also gives some kind of scoring for security issues if any.
+
====== +host +target======
 +
 
 +
:Print details about the targets hostname, DNS, etc.                 
 +
:These details are usually printed only for the  ''+check''  and  ''+info''  
 +
:command, but not for any individual command.
  
 
====== +http======
 
====== +http======
Line 404: Line 492:
 
====== +quick======
 
====== +quick======
  
:    Quick overview of checks. Implies ''--enabled''  and  ''--short''.
+
:    Quick overview of checks. Implies ''--enabled''  and  ''--label=short''.
  
 
====== +pfs======
 
====== +pfs======
  
 
: Check if servers offers ciphers with prefect forward secrecy (PFS)
 
: Check if servers offers ciphers with prefect forward secrecy (PFS)
 +
 +
====== +protocols======
 +
 +
: Check for protocols supported by target.
 +
 +
====== +vulns======
 +
 +
: Check for various vulnerabilities.
  
 
====== +sts +hsts======
 
====== +sts +hsts======
Line 458: Line 554:
 
:    This command should not be used directly.
 
:    This command should not be used directly.
  
===== Commands to test target's ciphers=====
+
===== Commands to test ciphers provided by target=====
 +
 
 +
: Beside the description of the commands itself here, please see also 
 +
: [[#Notes about commands]]  below.
 +
 
 
====== +cipher======
 
====== +cipher======
  
Line 465: Line 565:
  
 
:    Note that ciphers  not supported  by the local SSL implementation
 
:    Note that ciphers  not supported  by the local SSL implementation
:    are not checked by default, use ''+cipherall'' command for that.
+
:    are not checked by default, use ''+cipherall'' or ''+cipherraw'' command for that.
  
====== +cipherall +cipherraw======
+
: Use  ''--v''  option to see all ciphers being checked.
 +
 
 +
====== +cipherraw======
  
 
:    Check target for all possible ciphers.
 
:    Check target for all possible ciphers.
Line 474: Line 576:
 
:    In contrast to  ''+cipher''  this command has some options to tweak
 
:    In contrast to  ''+cipher''  this command has some options to tweak
 
:    the cipher tests, connection results, and some strange behaviours
 
:    the cipher tests, connection results, and some strange behaviours
:    of the target. See [[#Options for +cipherall command]] for details.
+
:    of the target. See [[#Options for cipherall and cipherraw  command]] for details.
  
 
<!-- other names: +allciphers +rawciphers +cipherall -->
 
<!-- other names: +allciphers +rawciphers +cipherall -->
  
====== +cipher-SSL======
+
====== +cipherall ======
  
:     Get default cipher for protocol SSL.
+
: Same as  ''+cipherraw''  but ouput format similat to  ''+cipher''  command.
  
===== Commands to test SSL connection to target=====
+
====== +cipher-default======
  
: Please see:
+
: Lists the cipher selected by the server for each protocol sometimes
 +
: referred to as "default cipher".
 +
: For each protocol the two selected ciphers are shown,  one returned
 +
: by the server if the cipher list in the  ClientHello is sorted with
 +
: the strongest cipher first, and one returned  if the cipher list in
 +
: the ClientHello is sorted with strongest cipher last.
 +
: See  [[#Notes about commands]]  for details.
  
    o-saft.pl --help=commands
+
====== +cipher-dh======
 +
 
 +
: Checked target for ciphers. All ciphers supported by the server are
 +
: printed with their DH or ECDH paramaters (if available).
 +
: ciphers.
 +
 
 +
====== +cipher-null  +null======
  
===== Commands to show details of the target's certificate=====
+
:  Check if target accepts NULL ciphers.
  
: Please see:
+
====== +cipher-adh +adh======
    o-saft.pl --help=commands
 
  
===== Notes about commands=====
+
:  Check if target accepts ciphers with anonymous key exchange.
  
====== +extensions vs. +tlsextensions======
+
====== +cipher-exp +export======
  
: ''+extensions''  shows the "Certificate extensions" and  ''+tlsextensions''
+
:   Check if target accepts EXPORT ciphers.
: will show the TLS protocol extensions.
+
 
: Use  ''+tlsextdebug''  to show more informations about the TLS protocol
+
====== +cipher-cbc +cbc======
: extensions.
 
  
====== +http2 +spdy +spdy3 +spdy31 +spdy4 +prots======
+
:  Check if target accepts CBC ciphers.
  
: These commands are just an alias for the  ''+protocols''  command.
+
====== +cipher-des +des======
  
==== OPTIONS====
+
:  Check if target accepts DES ciphers.
  
: All options are written in lowercase. Words written in all capital in
+
====== +cipher-rc4======
: the description here is text provided by the user.
 
  
===== Options for help and documentation=====
+
:  Check if target accepts RC4 ciphers.
  
====== --h======
+
====== +cipher-edh +edh======
  
====== --help======
+
:  Check if target supports ephemeral ciphers.
  
:  WYSIWYG
+
====== +cipher-pfs======
  
====== --help=cmd======
+
:  Check if target supports ciphers with PFS.
  
:  Show available commands.
+
====== +cipher-strong======
  
====== --help=commands======
+
:  Check if target selects strongest cipher.
  
:  Show available commands with short description.
+
====== +cipher-weak======
  
====== --help=opt======
+
:  Check if target selects weak cipher (oposite of ''+cipher-strong'').
  
:  Show available options; short form.
+
===== Discrete commands to test SSL connection and certificate details=====
  
====== --help=options======
+
: Discrete commands, please see:
  
:  Show available options with their description.
+
    o-saft.pl --help=commands
  
====== --help=checks======
+
===== Notes about commands=====
  
:  Show available checks.
+
====== +cipher vs. +cipherall======
  
====== --help=check-cfg --help=cfg-check======
+
: ''+cipher''  can only check for ciphers - more precise: cipher suites -
 +
: provided by the local SSL implementation (i.e. libssl).
 +
: ''+cipherall''  can check for any cipher,  as it just uses the cipher's
 +
: integer value in the range 0 .. 65532.
  
:  Show texts used as labels in output for checks (see  ''+check'')  ready
+
====== +cipherall vs. +cipherraw======
:   for use in  [[#RC-FILE|RC-FILE]]  or as option.
+
: These commands are identical, just the output format is different.
  
====== --help=data======
+
====== +cipher vs. +cipher-default======
  
:   Show available informations.
+
: Both commands show the default cipher foreach protocol.
  
====== --help=data-cfg --help=cfg-data======
+
: ''+cipher''  lists a summary of ciphers selected by the server for each
 +
: protocol requested by the user (for example by using options like:
 +
: ''--sslv3'' ''--tlsv1'' etc.).  When the  --v  option is used, all selected
 +
: ciphers for all known protocols are listed. This summary focuses on 
 +
: counts for various ciphers.
  
:   Show texts used  as labels in output for  data  (see  ''+info'') ready
+
: ''+cipher-default''  lists the  selected cipher by the server for each
:   for use in  [[#RC-FILE|RC-FILE]]  or as option.
+
: protocol.
  
====== --help=hint======
+
====== +cipher-selected vs. +cipher-default======
  
:   Show texts used in hint messages.
+
: ''+cipher-selected''  lists the cipher selected by the server if no particular
 +
: protocol was specified and the system's default cipher list is send
 +
: in the ClientHello to the server.
  
====== --help=hint-cfg --help=cfg-hint======
+
: ''+cipher-default''  lists the  selected cipher by the server for each
 +
: protocol.
  
:  Show texts used in hint messages ready for use in  [[#RC-FILE|RC-FILE]]  or as
+
====== +cipher-strong vs. +cipher-default======
:  option.
 
  
====== --help=text======
+
: ''+cipher-strong''  shows the result of the check if strong ciphers are
:   Show texts used in various messages.
+
: preferred by the server. It is a check command.
  
====== --help=text-cfg --help=cfg-text======
+
: ''+cipher-default''  lists the  cipher selected  by the server for each
 +
: protocol. It is a information command.
  
:   Show texts used in various messages ready for use in [[#RC-FILE|RC-FILE]] or
+
: It is not possible to check if a server uses 'SSLHonorCipherOrder'.
:   as option.
+
: Even if it is used (switched on), it is not possible to check the
 +
: specified order of the ciphers.  
  
====== --help=legacy======
+
: I. g. it is expected that the order is according the cipher suite's
 +
: strength, meaning the most strongest first, and the weakest last.
 +
: It does not make sense to use an order where a weak cipher preceeds
 +
: a stronger one. Such a (mis-)configuration should be detected.
  
:   Show possible legacy formats (used as value in  ''--legacy=KEY'').
+
: Having this in mind, the algorithm to detect a proper cipher order
 +
: is as simply as follows:
 +
    1. pass sorted cipher list with strongest cipher first
 +
    2. pass sorted cipher list with strongest cipher last
 +
: if the server returns the same cipher for both checks, it's assumed
 +
: that it prefers to use the most strongest cipher. In this case it's
 +
: obvious that 'SSLHonorCipherOrder' is set (exceptions see below).
  
====== --help=compliance======
+
: ''+cipherall''  uses a  more accurate algorithm  to detect the server's
 +
: cipher order.
  
:   Show available compliance checks.
+
: '''Exceptions:'''
 +
: If either, the server or the client,  uses only one cipher suite in
 +
: the list, SSLHonorCipherOrder cannot be detected at all.
 +
: The same happens, if only one cipher in the client's list matches a
 +
: cipher in the server's list.
  
====== --help=intern======
+
====== +extensions vs. +tlsextensions======
  
:   Show internal commands.
+
: ''+extensions''  shows the "Certificate extensions" and  ''+tlsextensions''
 +
: will show the TLS protocol extensions.
 +
: Use  ''+tlsextdebug''  to show more informations about the TLS protocol
 +
: extensions.
  
====== --help=range======
+
====== +http2 +spdy +spdy3 +spdy31 +spdy4 +prots======
  
:   Show list of cipherranges (see ''--cipherrange=RANG'').
+
: These commands are just an alias for the  ''+protocols'' command.
  
====== --help=score======
+
====== +hostname vs. +wildhost vs. +altname vs. +rfc_2818======
  
:   Show score value for each check.
+
:The commands  ''+cn''  and  ''+altname''  print the  information stored  in
:   Value is printed in format to be used for ''--cfg_score=KEY=SCORE''.
+
:the certificate.
 +
:The command  ''+hostname''  checks if the given hostname matches the CN
 +
:value in the certificate. Note that wildcard names in the CN, only
 +
:allow to contain one '*'.
 +
:The command ''+wildcard'' checks if the given hostname does not match
 +
:any name specified in the certificate's "subjectAltname". This check
 +
:is useful  if the certificate and the configuration  must comply to
 +
:RFC 6125 or EV certificates.
  
:  Note that the  sequence  of options  is important.  Use the options
+
==== OPTIONS====
:  ''--trace''  and/or  ''--cfg_score=KEY=SCORE''  before  ''--help=score''.
 
  
====== --help=toc  --help=content======
+
: All options are written in lowercase. Words written in all capital in
:   Show headlines from help textsUseful to get an overview.
+
: the description here is text provided by the user.
  
====== --help=SECTION======
+
===== Options for help and documentation=====
  
:  Show  <SECTION>  from documentation, see  ''--help=toc''  for a list.
+
====== --h======
:  Example:
 
      o-saft.pl --help=EXAMPLES
 
  
====== --help=regex======
+
====== --help======
  
Show regular expressions used internally.
+
WYSIWYG
  
====== --help=gen-html======
+
====== --help=help ======
 +
:Show available options to show descriptions (this Options section).
  
:  Show help text in HTML format.
+
====== --help=cmds======
  
====== --help=gen-wiki======
+
:  Show available commands.
  
:  Show help text in mediawiki format.
+
====== --help=commands======
  
====== --help=gen-cgi======
+
:  Show available commands with short description.
  
:  Generate HTML page with o-saft.cgi as form action..
+
====== --help=opt======
  
====== --help=error --help=warning --help=problem ======
+
:  Show available options; short form.
  
:Show  [[#KNOWN PROBLEMS|KNOWN PROBLEMS]]  section with  description of known  error and
+
====== --help=options======
:warning messages.
 
  
====== --help=FAQ ======
+
:  Show available options with their description.
  
:Show  [[#KNOWN PROBLEMS|KNOWN PROBLEMS]]  and  [[#LIMITATIONS|LIMITATIONS]]  section.
+
====== --help=checks======
  
====== --help=glossar======
+
:  Show available checks.
  
:  Show common abbreviation used in the world of security.
+
====== --help=tools======
  
====== --help=todo======
+
:Description of tools around O-Saft, when, where and how to use.
  
:  Show known problems and bugs.
+
====== --help=cmd======
  
===== Options for all commands (general)=====
+
:Show additional and user specified commands.
====== --no-rc======
 
  
:  Do not read  [[#RC-FILE|RC-FILE]] .
+
====== --help=cfg-cmd======
  
====== --dns======
+
:Show additional and user specified commands.  Output can be used in
 +
:[[#RC-FILE|RC-FILE]]  or as option.
  
:  Do DNS lookups to map given hostname to IP, do a reverse lookup.
+
====== --help=check-cfg --help=cfg-check======
  
====== --no-dns======
+
:  Show texts used as labels in output for checks (see  ''+check'')  ready
 +
:  for use in  [[#RC-FILE|RC-FILE]]  or as option.
  
:  Do not make DNS lookups.
+
====== --help=data======
:  Note  that the corresponding IP and reverse hostname may be missing
 
:  in some messages then.
 
  
====== --host=HOST======
+
:  Show available informations.
  
:  Specify <code>HOST</code> as target to be checked. Legacy option.
+
====== --help=data-cfg --help=cfg-data --help=cfg-info======
  
====== --port=PORT======
+
:  Show texts used  as labels in output for  data  (see  ''+info'')  ready
 +
:  for use in  [[#RC-FILE|RC-FILE]]  or as option.
  
:  Specify target's <code>PORT</code> to be used. Legacy option.
+
====== --help=hint======
  
====== --host=HOST --port=PORT HOST:PORT HOST======
+
:   Show texts used in hint messages.
  
:  When giving more than one HOST argument,  the sequence of the given
+
====== --help=hint-cfg --help=cfg-hint======
:  HOST argument and the given  ''--port=PORT''  and the given ''--host=HOST''
 
:  options are important.
 
:  The rule how ports and hosts are mapped is as follows:
 
:  *    HOST:PORT arguments are used as is (connection to HOST on PORT)
 
:  *    only HOST is given, then previous specified ''--port=PORT'' is used
 
:  Note that URLs are treated as HOST:PORT, if they contain a port.
 
:  Example:
 
    o-saft.pl +cmd host-1 --port 23 host-2 host-3:42 host-4
 
:  will connect to:
 
      host-1:443
 
      host-2:23
 
      host-3:42
 
      host-4:23
 
  
====== --proxyhost=PROXYHOST --proxy=PROXYHOST:PROXYPORT======
+
:  Show texts used in hint messages ready for use in  [[#RC-FILE|RC-FILE]]  or as
 +
:   option.
  
:Make all connection to target using <code>PROXYHOST</code>.
+
====== --help=text======
 +
:   Show texts used in various messages.
  
:Also possible is: ''--proxy=PROXYUSER:PROXYPASS@PROXYHOST:PROXYPORT''
+
====== --help=text-cfg --help=cfg-text======
  
====== --proxyport=PROXYPORT======
+
:    Show texts used in various messages ready for use in  [[#RC-FILE|RC-FILE]]  or
 +
:    as option.
  
:  Make all connection to target using PROXYHOST:PROXYPORT.
+
====== --help=legacy======
  
====== --proxyuser=PROXYUSER======
+
:  Show possible legacy formats (used as value in  [[#--legacy=KEY|--legacy=KEY]]).
  
:  Specify username for proxy authentication.
+
====== --help=compliance======
  
====== --proxypass=PROXYPASS======
+
:  Show available compliance checks.
  
:  Specify password for proxy authentication.
+
====== --help=intern======
:  ''--proxy=PROXYUSER:PROXYPASS@PROXYHOST:PROXYPORT'' is also possible.
 
  
====== --starttls======
+
:  Show internal commands.
  
:  Use <code>STARTTLS</code> command to start a TLS connection via SMTP.
+
====== --help=range======
: This option is a shortcut for  ''--starttls=SMTP''
+
: Show list of cipherranges (see [[#--cipherrange=RANGE--cipherrange=RANGE]]).
  
====== --starttls=PROT======
+
====== --help=alias======
 +
: Show alias for commands and options.
  
:  Use <code>STARTTLS</code> command to start a TLS connection via protocol.
+
====== --help=pattern======
: <code>PROT</code>  may be any of: <code>SMTP</code>, <code>IMAP</code>, <code>IMAP2</code>, <code>POP3</code>, <code>FTPS</code>, <code>LDAP</code>, <code>RDP</code>, <code>XMPP</code>
+
: Show list of cipher pattern (used for [[#--cipher=CIPHER|--cipher=CIPHER]]).
  
:  For  ''--starttls=SMTP'' see  ''--dns-mx''  also to use MX records instead
+
====== --help=score======
:  of host
 
  
====== --starttls-delay=SEC======
+
:  Show score value for each check.
 +
:  Value is printed in format to be used for  ''--cfg_score=KEY=SCORE''.
  
Number of seconds to wait before sending a packet, to slow down the
+
:   Note that the  sequence of options is importantUse the options
: <code>STARTTLS</code> requests. Default is 0.
+
:   ''--trace'' and/or  ''--cfg_score=KEY=SCORE'' before ''--help=score''.
: This may prevent blocking of requests by the target due to too much
 
:  or too fast connections.
 
: Note: In this case there is an automatic suspension and retry with
 
: a longer delay.
 
  
====== --cgi, --cgi-exec======
+
====== --help=toc  --help=content======
 +
:  Show headlines from help textsUseful to get an overview.
  
:  Internal use for CGI mode only.
+
====== --help=SECTION======
  
===== Options for SSL tool=====
+
:  Show  <code>SECTION</code>  from documentation, see  [[#--help=toc|--help=toc]]  for a list.
 +
:  Example:
 +
      o-saft.pl --help=EXAMPLES
 +
 
 +
====== --help=regex======
  
====== --s_client======
+
:  Show regular expressions used internally.
  
:  Use  <code>openssl s_slient ...</code> call to retrieve more informations from
+
====== --help=gen-html======
:  the SSL connection.  This is disabled by default on Windows because
 
:  of performance problems. Without this option (default on Windows !)
 
:  following informations are missing on Windows:
 
      compression, expansion, renegotiation, resumption,
 
      selfsigned, verify, chain, protocols, DH parameters
 
:  See ''Net::SSLinfo'' for details.
 
  
:   If used together with ''--trace'', s_client data will also be printed
+
: Show help text in HTML format.
in debug output of ''Net::SSLinfo''.
 
  
====== --no-openssl======
+
====== --help=gen-pod======
  
:   Do not use external <code>openssl</code> tool to retrieve informations. Use of
+
: Show help text in POD format.
:  <code>openssl</code> is disabled by default on Windows.
 
:  Note that this results in some missing informations, see above.
 
  
====== --openssl=TOOL======
+
====== --help=gen-wiki======
  
:   <code>TOOL</code>      can be a path to openssl executable; default: openssl
+
Show help text in mediawiki format.
  
====== --openssl-cnf=FILE --openssl-conf=FILE======
+
====== --help=gen-cgi======
  
: <code>FILE</code>        path of directory or full path of openssl.cnf
+
: Generate HTML page with o-saft.cgi as form action..
  
:If set, environment variable OPENSSL_CONF will be set to given path
+
====== --help=error --help=warning --help=problem ======
:(or file) when ''openssl(1)'' is started. Please see openssl's man page
 
:for details about specifying alternate  openssl.cnf  files.
 
  
====== --force-openssl======
+
:Show  [[#KNOWN PROBLEMS|KNOWN PROBLEMS]]  section with  description of known  error and
 +
:warning messages.
  
:  Use openssl to check for supported ciphers;  default: IO::Socket
+
====== --help=FAQ ======
  
:   This option forces to use <code>openssl s_slient -connect CIPHER ..</code> to
+
:Show [[#KNOWN PROBLEMS|KNOWN PROBLEMS]]  and  [[#LIMITATIONS|LIMITATIONS]]  section.
:  check if a cipher is supported by the remote target. This is useful
 
:  if the ''--lib=PATH'' option doesn't work (for example due to changes
 
:  of the API or other incompatibilities).
 
  
====== --exe-path=PATH --exe=PATH======
+
====== --help=glossar======
  
:   <code>PATH</code>      is a full path where to find openssl.
+
: Show common abbreviation used in the world of security.
  
====== --lib-path=PATH --lib=PATH======
+
====== --help=links======
 +
:  Show list of URLs related to SSL/TLS.
  
:   <code>PATH</code>      is a full path where to find libssl.so and libcrypto.so
+
====== --help=rfc======
 +
: Show list of RFC related to SSL/TLS.
  
:   See [[#HACKER's INFO|HACKER's INFO]] below for a detailed description how it works.
+
====== --help=todo======
 +
: Show known problems and bugs.
  
====== --envlibvar=NAME======
+
====== --help=exit======
 +
:  Show possible  ''--exit=KEY''  options. Used for debugging only.
  
:  <code>NAME</code>  is the name of a environment variable containing additional
+
====== --help=program.code======
:   paths for searching dynamic shared libraries.
+
: For developers.
:  Default is LD_LIBRARY_PATH .
 
  
:  Check your system for the proper name, i.e.:
+
===== Options for all commands (general)=====
:      DYLD_LIBRARY_PATH, LIBPATH, RPATH, SHLIB_PATH .
+
====== --dns======
  
====== --ssl-lazy======
+
:  Do DNS lookups to map given hostname to IP, do a reverse lookup.
  
:  if the ''--lib=PATH'' option doesn't work (for example due to changes
+
====== --no-dns======
:  I.g. this tools tries to identify available functionality according
 
:  SSL versions from the underlaying libraries.  Unsupported  versions
 
:  are then disables and a warning is shown.
 
:  Unfortunately some libraries have  not implemented all functions to
 
:  check availability of a specific SSL version, which then results in
 
:  a compile error.
 
  
This option disables the strict check of availability.
+
Do not make DNS lookups.
If the underlaying library doesn't support the required SSL version
+
Note  that the corresponding IP and reverse hostname may be missing
at all, following error may occour:
+
:  in some messages then.
      Can't locate auto/Net/SSLeay/CTX_v2_new.al in @INC ...
 
  
====== -v======
+
====== --host=HOST======
  
: Print list of ciphers in style like: <code>openssl ciphers -v</code>.
+
:   Specify <code>HOST</code> as target to be checked. Legacy option.
:  Option used with  ''+ciphers''  command only.
 
  
====== -V======
+
====== --port=PORT======
  
: Print list of ciphers in style like: <code>openssl ciphers -V</code>.
+
:   Specify target's <code>PORT</code> to be used. Legacy option.
:  Option used with  ''+ciphers''  command only.
 
  
===== Options for SSL connection to target=====
+
====== --host=HOST --port=PORT HOST:PORT HOST======
====== --cipher=CIPHER======
 
  
* <code>CIPHER</code>   can be any string accepeted by openssl or following:
+
:  When giving more than one HOST argument,  the sequence of the given
* <code>yeast</code>    use all ciphers from list defined herein, see ''+list''
+
:  HOST argument and the given  ''--port=PORT''  and the given ''--host=HOST''
 +
:  options are important.
 +
:  The rule how ports and hosts are mapped is as follows:
 +
*    HOST:PORT arguments are used as is (connection to HOST on PORT)
 +
*   only HOST is given, then previous specified ''--port=PORT'' is used
 +
:  Note that URLs are treated as HOST:PORT, if they contain a port.
 +
:  Example:
 +
    o-saft.pl +cmd host-1 --port 23 host-2 host-3:42 host-4
 +
:  will connect to:
 +
      host-1:443
 +
      host-2:23
 +
      host-3:42
 +
      host-4:23
  
:  Beside the cipher names accepted by openssl, CIPHER can be the name
+
====== --proxyhost=PROXYHOST --proxy=PROXYHOST:PROXYPORT======
:  of the constant or the (hex) value as defined in openssl's files.
 
:  Currently supported are the names and constants of openssl 1.0.1k .
 
:  Example:
 
* --cipher=DHE_DSS_WITH_RC4_128_SHA
 
* --cipher=0x03000066
 
* --cipher=66
 
: will be mapped to  DHE-DSS-RC4-SHA
 
  
: Note: if more than one cipher matches, just one will be selected.
+
:Make all connection to target using <code>PROXYHOST</code>.
:
 
:  Default is <code>ALL:NULL:eNULL:aNULL:LOW</code> as specified in Net::SSLinfo
 
  
====== --ignore-no-connect======
+
:Also possible is: ''--proxy=PROXYUSER:PROXYPASS@PROXYHOST:PROXYPORT''
  
:  A simple check if the target can be connected  will be performed by
+
====== --proxyport=PROXYPORT======
:  default.  If this check fails, the target will be ignored, means no
 
:  more reuqested checks will be done.  As this connection check some-
 
:  times fails due to various reasons, the check can be disabled using
 
:  this option.
 
  
====== --no-md5-cipher======
+
:  Make all connection to target using PROXYHOST:PROXYPORT.
  
:  Do not use *-MD5 ciphers for other protocols than SSLv2.
+
====== --proxyuser=PROXYUSER======
:  This option is only effective with  ''+cipher''  command.
 
  
: The purpose is to avoid warnings from  IO::Socket::SSL  like:
+
:   Specify username for proxy authentication.
        Use of uninitialized value in subroutine entry at lib/IO/Socket/SSL.pm line 430.
 
:  which occours with some versions of  IO::Socket::SSL  when a  *-MD5
 
:  ciphers will be used with other protocols than SSLv2.
 
  
:  Note that these ciphers will be checked for SSLv2 only.
+
====== --proxypass=PROXYPASS======
  
====== --SSL, -protocol SSL======
+
:  Specify password for proxy authentication.
 +
:  ''--proxy=PROXYUSER:PROXYPASS@PROXYHOST:PROXYPORT'' is also possible.
  
====== --no-SSL======
+
====== --starttls======
* <code>SSL</code>      can be any of:
 
:ssl, ssl2, ssl3, sslv2, sslv3, tls1,
 
:tls1, tls11, tls1.1, tls1-1, tlsv1, tlsv11, tlsv1.1, tlsv1-1
 
:(and similar variants for tlsv1.2).
 
:For example  ''--tls1''  ''--tlsv1''  ''--tlsv1_1''  are all the same.
 
  
(''--SSL'' variants):    Test ciphers for this SSL/TLS version.
+
Use <code>STARTTLS</code> command to start a TLS connection via SMTP.
(''--no-SSL'' variants): Don't test ciphers for this SSL/TLS version.
+
This option is a shortcut for  ''--starttls=SMTP''
  
====== --no-tcp======
+
====== --starttls=PROT======
:Shortcut for:
 
:''--no-sslv2 --no-sslv3 --no-tlsv1 --no-tlsv11 --no-tlsv12 --no-tlsv13''
 
  
====== --tcp======
+
:  Use <code>STARTTLS</code> command to start a TLS connection via protocol.
 +
:  <code>PROT</code>  may be any of:  <code>SMTP</code>, <code>IMAP</code>, <code>IMAP2</code>, <code>POP3</code>, <code>FTPS</code>, <code>LDAP</code>, <code>RDP</code>, <code>XMPP</code>
 +
 
 +
:  For  ''--starttls=SMTP'' see  ''--dns-mx''  also to use MX records instead
 +
:  of host
 +
 
 +
====== --starttls-delay=SEC======
  
:Shortcut for''--sslv2 --sslv3 --tlsv1 --tlsv11 --tlsv12 --tlsv13''
+
: Number of seconds to wait before sending a packet, to slow down the
 +
:  <code>STARTTLS</code> requests. Default is 0.
 +
:  This may prevent blocking of requests by the target due to too much
 +
:  or too fast connections.
 +
:  Note:  In this case there is an automatic suspension and retry with
 +
a longer delay.
  
====== --no-udp======
+
====== --cgi, --cgi-exec======
  
:Shortcut for:
+
: Internal use for CGI mode only.
:''--no-dtlsv09 --no-dtlsv1 --no-dtlsv11 --no-dtlsv12 --no-dtlsv13''
 
  
====== --udp======
+
===== Options for SSL tool=====
 +
====== --no-rc======
  
:Shortcut for: ''--dtlsv09 --dtlsv1 --dtlsv11 --dtlsv12 --dtlsv13''
+
: Do not read [[#RC-FILE|RC-FILE]] .
  
====== --nullsslv2======
+
====== --rc======
:  This option  forces  to assume that  SSLv2  is enabled  even if the
 
:  target does not accept any ciphers.
 
  
The target server may accept connections with  SSLv2  but not allow
+
: Read [[#RC-FILE|RC-FILE]] if exists, from directory where program was found.
: any cipher. Some checks verify if SSLv2  is enabled at all, which
 
:  then would result in a failed test.
 
:  The default behaviour is to assume that  SSLv2 is not enabled if no
 
:  ciphers are accepted.
 
:
 
====== --http======
 
  
:  Make a HTTP request if cipher is supported.
+
====== --rc=path/to/FILE ======
  
If used twice debugging will be enabled using  environment variable
+
: Read [[#RC-FILE|RC-FILE]] <code>path/to/FILE</code> if exists.
: <code>HTTPS_DEBUG</code> .
 
  
====== --no-http======
+
====== --exitcode======
:
+
:The exit status code will be greater 0, if any of following applies:
Do not make HTTP request.
+
:* any check returns <code>no</code>, except if  <code>no (<<...>>)</code>
:
+
:* insecure protocols are available
====== --sni======
+
:* insecure ciphers are supported
:
+
:* ciphers without PFS are supported
: Make SSL connection in SNI mode.
+
:In particular, the status code will be the total count of all these
:
+
:checks. The status code will also be printed at end, like:
====== --no-sni======
+
    # EXIT 23
  
Do not make SSL connection in SNI mode (default: SNI mode).
+
:Parts of these checks can be diasabled, see  ''--exitcode-*''  options
 +
:below.
  
====== --sni-toggle --toggle-sni ======
+
:Use  ''--v''  or  ''--exitcode-v'' to see details about the performed checks.
  
: Test with and witout SNI mode.
+
:Functionality implemented experimental, may change in future.
  
====== --force-sni======
+
======--exitcode-v======
 +
:Print information about performed checks.
  
: Do not check if SNI seems to be supported by ''Net::SSLeay(1)''.
+
======--exitcode-quiet======
:  Older versions of openssl and its libries do not support SNI or the
+
:Do not print status code at end like <code># EXIT 23</code>.
:  SNI support is implemented buggy. By default it's checked if SNI is
 
:  properly supported. With this option this check can be disabled.
 
  
Be warned that this may result in improper results.
+
====== --exitcode-no-checks======
 +
:Do not count checks with result 'no' for ''--exitcode'' .
  
====== --servername=NAME======
+
====== --exitcode-no-low  --exitcode-no-weak  --exitcode-no-medium======
====== --sni-name=NAME======
+
:Do not count <code>LOW</code>, <code>WEAK</code> or <code>MEDIUM</code> security ciphers for  ''--exitcode'' .
  
:  Use  <code>NAME</code>  instead of given hostname to connect to  target in SNI
+
====== --exitcode-no-ciphers======
:  mode. By  default,  <code>NAME</code>  is automatically set to the given FQDN.
+
:Do not count any ciphers for ''--exitcode'' .
:  This is insufficient, when an IP instead of a FQDN was given,  then
 
the connection needs to specify the correct hostname (i.g. a FQDN).
 
  
:  For historical reason, the value <code>1</code> is the same as if the the real
+
====== --exitcode-no-pfs======
:  FQDN (given hostname) has been used.  If the value is empty, or the
+
:Do not count ciphers without PFS for ''--exitcode'' .
value <code>0</code> is given, no SNI name will be used.
 
  
:  Note: i.g. there is no need to use this option,  as a correct value
+
====== --openssl-s_client --s_client======
:  for the SNI name will be choosen automatically (except for IPs).
 
:  However, it's kind of fuzzing ...
 
  
====== --no-cert======
+
:  Use  <code>openssl s_slient ...</code> call to retrieve more informations from
:
+
:   the SSL connection.  This is disabled by default on Windows because
: Do not get data from target's certificate, return empty string.
+
:   of performance problems. Without this option (default on Windows !)
:
+
:  following informations are missing:
====== --no-cert --no-cert======
+
      compression, expansion, renegotiation, resumption,
:
+
      selfsigned, verify, chain, protocols, DH parameters
:  Do not get data from target's certificate, return default string
+
:   See ''Net::SSLinfo'' for details.
: of ''Net::SSLinfo'' (see  ''--no-cert-text TEXT'' option).
+
 
:
+
:  If used together with ''--trace'', s_client data will also be printed
 +
:   in debug output of ''Net::SSLinfo''.
  
====== --no-cert-text=TEXT======
+
====== --no-openssl======
:
+
 
: Set  <code>TEXT</code> to be returned from  <code>Net::SSLinfo.pm</code> if no certificate
+
:   Do not use external <code>openssl</code> tool to retrieve informations. Use of
: data is collected due to use of  ''--no-cert''.
+
<code>openssl</code> is disabled by default on Windows.
:
+
:   Note that this results in some missing informations, see above.
 +
 
 +
====== --openssl=TOOL======
 +
 
 +
:   <code>TOOL</code>      can be a path to openssl executable;  default: openssl
  
====== --ca-depth=INT======
+
====== --openssl-cnf=FILE --openssl-conf=FILE======
:
 
:  Check certificate chain to depth  <code>INT</code> (like openssl's -verify).
 
:
 
  
====== --ca-file=FILE======
+
: <code>FILE</code>       path of directory or full path of openssl.cnf
:
 
: Use  <code>FILE</code> with bundle of CAs to verify target's certificate chain.
 
:
 
  
====== --ca-path=DIR======
+
:If set, environment variable OPENSSL_CONF will be set to given path
:
+
:(or file) when ''openssl(1)'' is started. Please see openssl's man page
Use  <code>DIR</code> where to find CA certificates in PEM format.
+
:for details about specifying alternate openssl.cnf files.
:
 
  
====== --no-nextprotoneg======
+
====== --openssl-ciphers --force-openssl======
:
 
:  Do not use  <code>-nextprotoneg</code>  option for openssl.
 
:
 
====== --no-reconnect======
 
:
 
:  Do not use  <code>-reconnect</code>  option for openssl.
 
:
 
====== --no-tlsextdebug======
 
:
 
:  Do not use  <code>-tlsextdebug</code>  option for openssl.
 
:
 
====== --sclient-opt=VALUE======
 
:
 
:  Argument or option passed to openssl s_client command.
 
:
 
===== Options for ''+cipherall''  command =====
 
  
====== --range=RANGE ======
+
:  Use openssl to check for supported ciphers;  default: IO::Socket
====== --cipherrange=RANGE======
 
  
: Specify range of cipher constants to be tested by  ''+cipherall'' .
+
:   This option forces to use <code>openssl s_slient -connect CIPHER ..</code> to
: Following <code>RANGE</code>s are supported:
+
:  check if a cipher is supported by the remote target. This is useful
 +
:   if the ''--lib=PATH'' option doesn't work (for example due to changes
 +
:  of the API or other incompatibilities).
  
*  <code>rfc</code>            all ciphers defined in various RFCs
+
====== --exe-path=PATH --exe=PATH======
*  <code>shifted</code>        <code>rfc</code>, shifted by 64 bytes to the right
 
*  <code>long</code>            like <code>rfc</code> but more lazy list of
 
*  <code>huge</code>            all constants  0x03000000 .. 0x0300FFFF
 
*  <code>safe</code>            all constants  0x03000000 .. 0x032FFFFF
 
*  <code>full</code>            all constants  0x03000000 .. 0x0300FFFF
 
*  <code>SSLv2</code>          all ciphers according RFC for SSLv2
 
  
:Note: <code>SSLv2</code> is the internal list used for testing SSLv2 ciphers.
+
:   <code>PATH</code>     is a full path where to find openssl.
:It does not make sense to use it for other protocols; however ...
 
  
====== --slow-server-delay=SEC======
+
====== --lib-path=PATH --lib=PATH======
  
: Additional delay in seconds  after the server is connected  using a
+
:   <code>PATH</code>      is a full path where to find libssl.so and libcrypto.so
:  proxy or before starting STARTTLS.
 
:  This is useful when connecting via  slow proxy chains or connecting
 
:  to slow servers before sending the STARTTLS sequence.
 
  
====== --ssl-maxciphers=CNT ======
+
:  See [[#HACKER's INFO|HACKER's INFO]] below for a detailed description how it works.
  
:  Maximal number of ciphers sent in a sslhello (default: 32).
+
====== --envlibvar=NAME======
  
====== --ssl-double-reneg======
+
:  <code>NAME</code>  is the name of a environment variable containing additional
 +
:  paths for searching dynamic shared libraries.
 +
:  Default is LD_LIBRARY_PATH .
  
: Send SSL extension  "reneg_info"  even if list of ciphers includes
+
:   Check your system for the proper name, i.e.:
: TLS_EMPTY_RENEGOTIATION_INFO_SCSV (default: do not include)
+
:       DYLD_LIBRARY_PATH, LIBPATH, RPATH, SHLIB_PATH .
  
====== --ssl-nodata-nocipher======
+
====== --ssl-error======                                                                      
 +
: The connection to  a target may fail, or even block, due to various 
 +
: reasons, for example lost network at all, blocking at firewall, etc. 
 +
: In particular when checking ciphers with  [[++cipher|+cipher]] , this may result 
 +
: in long delays until results are printed.                           
 +
: Using this option stops trying to do more connections to the target 
 +
: when  [[#--ssl-error-max=CNT|--ssl-error-max=CNT]]  consecutive errors occoured, or if the total 
 +
: amount of errors increases  [[#--ssl-error-total=CNT|--ssl-error-total=CNT]].
  
:  Do not abort testing for next cipher when the target  responds with
+
====== --ssl-error-max=CNT======
: "NoData" times out. Useful for TLS intolerant servers.
+
: Max. amount of consecutive errors (default: 5).
:  By default testing for ciphers is aborted  when the target responds
 
: with "noData message.
 
  
====== --ssl-use-ecc======
+
====== --ssl-error-timeout=SEC======
 +
: Timeout in seconds when a failed connection is treated as error and 
 +
: then counted (default: 1).
  
: Use supported elliptic curves. Default on.
+
====== --ssl-error-total=CNT======
 +
: Max. total amount of errors (default: 10).
  
====== --ssl-use-ec-point======
+
====== --ssl-lazy======
  
Use TLS "ec_point_formats" extensionDefault on.
+
:   I.g. this tools tries to identify available functionality according
 +
:  SSL versions from the underlaying libraries.  Unsupported versions
 +
:  are then disables and a warning is shown.
 +
:  Unfortunately some libraries have not implemented all functions to
 +
:  check availability of a specific SSL version, which then results in
 +
:  a compile error.  
  
====== --ssl-use-reneg======
+
:  This option disables the strict check of availability.
 +
:  If the underlaying library doesn't support the required SSL version
 +
:  at all, following error may occour:
 +
      Can't locate auto/Net/SSLeay/CTX_v2_new.al in @INC ...
  
:  Test for ciphers with "secure renegotiation" flag set.
+
====== --timeout=SEC======
:  Default: don't set "secure renegotiation" flag.
 
  
====== --ssl-retry=CNT======
+
:  Timeout in seconds when connecting to the target (default: 2).
  
:  Number of retries when connection timed-out (default: 2).
+
====== -v======
  
====== --ssl-timeout=SEC======
+
:  Print list of ciphers in style like: <code>openssl ciphers -v</code>.
 +
:  Option used with  ''+ciphers''  command only.
  
:  Number of seconds to wait until connection is qualified as timeout.
+
====== -V======
  
====== --dns-mx, --mx======
+
:  Print list of ciphers in style like: <code>openssl ciphers -V</code>.
 +
:  Option used with  ''+ciphers''  command only.
  
:  Get DNS MX records for given target and check the returned targets.
+
===== Options for SSL connection to target=====
:  (only useful with  ''--starttls=SMTP'')
+
====== --ciphermode=MODE======
  
===== Options for checks and results=====
+
Following <code>MODE</code>s are supported:
:
+
* <code>intern</code>    scan for ciphers using internal method; (default)
:Options used for ''+check''  command:
+
* <code>openssl</code>  scan for ciphers using external openssl executable
:
+
* <code>ssleay</code>    scan for ciphers using  IO::Socket  and Net::SSLeay
====== --enabled======
+
* <code>dump</code>      same as <code>intern</code> but print all cipher informations,
:
+
:                         useful when postprocessed by contrib/* tools
:  Only print result for ciphers accepted by target.
 
:
 
====== --disabled======
 
:
 
Only print result for ciphers not accepted by target.
 
:
 
====== --ignorecase======
 
:
 
: Checks are done case insensitive.
 
:
 
====== --no-ignorecase======
 
  
:  Checks are done case sensitive. Default: case insensitive.
+
====== --cipher=CIPHER======
:  Currently only checks according CN, alternate names in the target's
 
:  certificate compared to the given hostname are effected.
 
  
===== Options for output format=====
+
<code>CIPHER</code> can be any string accepted by openssl or following:
:
+
* <code>yeast</code>    use all ciphers from list defined herein, see ''+list''
====== --short======
 
:
 
:  Use short less descriptive text labels for  ''+check''  and  ''+info''
 
:  command.
 
:
 
====== --legacy=TOOL======
 
  
For compatibility with other tools, the output format used for the
+
Beside the cipher names accepted by openssl, CIPHER can be the name
result of the ''+cipher'' command can be adjusted to mimic the format
+
:  of the constant or the (hex) value as defined in openssl's files.
:  of other SSL testing tools.
+
Currently supported are the names and constants of openssl 1.0.1k .
 +
:  Example:
 +
* --cipher=DHE_DSS_WITH_RC4_128_SHA
 +
* --cipher=0x03000066
 +
* --cipher=66
 +
:  will be mapped to  DHE-DSS-RC4-SHA
  
The argument to the ''--legacy=TOOL'' option is the name of the tool
+
Note: if more than one cipher matches, just one will be selected.
: to be simulated.
+
:
 +
: Default is <code>ALL:NULL:eNULL:aNULL:LOW</code> as specified in Net::SSLinfo
  
Following <code>TOOL</code>s are supported:
+
====== --socket-reuse======
 +
: TCP socket will be reused for next connection attempt  even if SSL
 +
: connection failed.
  
*  <code>sslaudit</code>        format of output similar to  sslaudit
+
====== --no-socket-reuse======
*  <code>sslcipher</code>      format of output similar to  ssl-cipher-check
+
: Close TCP socket and then reopen for next connection attempt if SSL
*  <code>ssldiagnos</code>      format of output similar to  ssldiagnos
+
: connection failed.
*  <code>sslscan</code>        format of output similar to  sslscan
 
*  <code>ssltest</code>        format of output similar to  ssltest
 
*  <code>ssltestg</code>        format of output similar to  ssltest -g
 
*  <code>ssltest-g</code>      format of output similar to  ssltest -g
 
*  <code>sslyze</code>          format of output similar to  sslyze
 
*  <code>ssl-cipher-check</code>      same as sslcipher
 
*  <code>ssl-cert-check</code>  format of output similar to  ssl-cert-check
 
*  <code>testsslserver</code>  format of output similar to  TestSSLServer.jar
 
* <code> thcsslcHeck</code>    format of output similar to  THCSSLCheck
 
  
Note that these legacy formats only apply to  output of the checked
+
: This is useful for some servers which may return an "TLS alert" if
: ciphers. Other texts like headers and footers are adapted slightly.
+
: the connection fails and then fail again on the same socket.
  
:  Please do not expect identical output as the <code>TOOL</code>  when using these
+
====== --ignore-no-connect======
:  options, it's a best guess and should be parsable in a very similar
 
:  way.
 
  
======--legacy=compact======
+
:  A simple check if the target can be connected  will be performed by
 +
:  default.  If this check fails, the target will be ignored, means no
 +
:  more reuqested checks will be done.  As this connection check some-
 +
:  times fails due to various reasons, the check can be disabled using
 +
:  this option.
  
:Internal format: mainly avoid tabs and spaces format is as follows:
+
====== --no-md5-cipher======
  Some Label:<-- anything right of colon is data
+
:Do not use *-MD5 ciphers for other protocols than SSLv2.
 +
:This option is only effective with  ''+cipher'' command.
  
======--legacy=full======
+
:The purpose is to avoid warnings from  IO::Socket::SSL(3pm)  like:
 +
        Use of uninitialized value in subroutine entry at lib/IO/Socket/SSL.pm line 430.
 +
:which occours with some versions of  IO::Socket::SSL(3pm)  when a
 +
:*-MD5  ciphers will be used with other protocols than SSLv2.
  
:Internal format: pretty print each label in its own line,  followed
+
:Note that these ciphers will be checked for SSLv2 only.
:by data prepended by tab character (useful for ''+info''  only).
 
  
======--legacy=quick======
+
====== --SSL, -protocol SSL======
  
:Internal format: use tab as separator; ciphers are printed with bit
+
====== --no-SSL======
:length (implies ''--tab'').
+
* <code>SSL</code>      can be any of:
 +
:ssl, ssl2, ssl3, sslv2, sslv3, tls1,
 +
:tls1, tls11, tls1.1, tls1-1, tlsv1, tlsv11, tlsv1.1, tlsv1-1
 +
:(and similar variants for tlsv1.2).
 +
:For example  ''--tls1'' ''--tlsv1''  ''--tlsv1_1''  are all the same.
  
======--legacy=simple======
+
:  (''--SSL'' variants):    Test ciphers for this SSL/TLS version.
 +
:  (''--no-SSL'' variants): Don't test ciphers for this SSL/TLS version.
  
:Internal default format.
+
====== --no-tcp======
 +
:Shortcut for:
 +
:''--no-sslv2 --no-sslv3 --no-tlsv1 --no-tlsv11 --no-tlsv12 --no-tlsv13''
  
======--legacy=key======
+
====== --tcp======
  
:Internal format: print name of key instead of text as label. Key is
+
:Shortcut for''--sslv2 --sslv3 --tlsv1 --tlsv11 --tlsv12 --tlsv13''
:that of the internal data structure(s).  For ciphers and protocols,
 
:the corresponding hex value is used as key. Note that these values
 
:are unique.
 
  
====== --format=FORM======
+
====== --no-udp======
  
*  <code>raw</code>    Print raw data as passed from ''Net::SSLinfo'' .
+
:Shortcut for:
 +
:''--no-dtlsv09 --no-dtlsv1 --no-dtlsv11 --no-dtlsv12 --no-dtlsv13''
  
:    Note:  all data will be printed as is,  without additional label
+
====== --udp======
:    or formatting. It's recommended to use the option in conjunction
+
 
:   with exactly one command.  Otherwise the user needs  to know how
+
:Shortcut for''--dtlsv09 --dtlsv1 --dtlsv11 --dtlsv12 --dtlsv13''
:   to "read" the printed data.
 
  
* <code>hex</code>    Convert some data to hex: 2 bytes separated by <code>:</code>.
+
====== --nullsslv2======
*  <code>0x</code>    Convert some data with hex values:
+
:  This option  forces to assume that SSLv2 is enabled even if the
:                          2 bytes preceded by <code>0x</code> and separated by a space.
+
: target does not accept any ciphers.
* <code>/x</code>    Same as ''--format=\x''
 
* <code>\x</code>    Convert some data with hex values:
 
:                           2 bytes preceded by <code>\x</code> and no separating char.
 
  
====== --header======
+
:  The target server may accept connections with  SSLv2  but not allow
 +
:  any cipher. Some checks verify if  SSLv2  is enabled at all,  which
 +
:  then would result in a failed test.
 +
:  The default behaviour is to assume that  SSLv2 is not enabled if no
 +
:  ciphers are accepted.
 
:
 
:
:  Print formatting header.  Default for  ''+check'', ''+info'', ''+quick''.
+
====== --http======
:  and  ''+cipher''  only.
 
:
 
====== --no-header======
 
:  Do not print formatting header.
 
:  Usefull if raw output should be passed to other programs.
 
  
:   Note: must be used on command line to inhibit all header lines.
+
: Make a HTTP request if cipher is supported.
  
======--ignore-cmd=CMD======
+
: If used twice debugging will be enabled using  environment variable
======--ignore-output=CMD======
+
:  <code>HTTPS_DEBUG</code> .
======--no-cmd=CMD======
 
======--no-output=CMD======
 
:Do not print output (data or check result) for command <code>CMD</code>.
 
:<code>CMD</code> is any valid command, see [[#COMMANDS|COMMANDS]],  without leading <code>+</code>.
 
:Option can be used multiple times.
 
  
====== --score======
+
====== --no-http======
 
:
 
:
Print scoring results. Default for  ''+check''.
+
Do not make HTTP request.
 
:
 
:
====== --no-score======
+
====== --sni======
 
:
 
:
Do not print scoring results.
+
Make SSL connection in SNI mode.
:
 
====== --separator=CHAR======
 
:
 
====== --sep=CHAR======
 
:
 
:  <code>CHAR</code>      will be used as separator between  label and value of the
 
:      printed results. Default is  <code>:</code>
 
 
:
 
:
 +
====== --no-sni======
  
====== --tab======
+
:  Do not make SSL connection in SNI mode (default: SNI mode).
  
:  <code>TAB</code> character (0x09, \t)  will be used  as separator between  label
+
====== --sni-toggle --toggle-sni ======
:      and value of the printed results.
 
:  As label and value are already separated by a  <code>TAB</code>  character, this
 
:  options is only useful in conjunction with the  ''--legacy=compact''
 
:  option.
 
  
====== --showhost======
+
: Test with and witout SNI mode (''+cipherall''  only).
  
:  Prefix each printed line with the given hostname (target).
+
====== --force-sni======
:  The hostname will be followed by the separator character.
 
  
====== --win-CR======
+
:  Do not check if SNI seems to be supported by ''Net::SSLeay(3pm)''.
:
+
: Older versions of openssl and its libries do not support SNI or the
Print windows-Style with CR LF as end of line. Default is NL only.
+
SNI support is implemented buggy. By default it's checked if SNI is
:
+
: properly supported. With this option this check can be disabled.
===== Options for compatibility with other programs=====
 
  
:Please see other programs for detailed description (if not obvious:).
+
: Be warned that this may result in improper results.
:Note that only the long form options are accepted as most short form
+
 
:options are ambiguous.
+
====== --servername=NAME======
: Following list contains only those options not shown with:
+
====== --sni-name=NAME======
  o-saft.pl --help=alias
+
: If in SNI mode is active, see  ''--sni'' above, <code>NAME</code> is used instead of
 +
: hostname for connections to the target. If SNI mode is not active,
 +
: see  ''--no-sni''  above, <code>NAME</code> is not used. The default is undefined,
 +
: which forces to use the given FQDN.
  
Tool's Option        (Tool)          o-saft.pl Option
+
: This is useful, for example when an IP instead of a FQDN was given,
--------------------+---------------+---------------------------
+
: where a correct hostname (i.g. a FQDN) needs to be specified.
  --checks CMD        (TLS-Check.pl)  same as ''+CMD''
 
  -h, -h=HOST        (various tools) same as ''--host HOST''
 
  -p, -p=PORT        (various tools) same as ''--port PORT''
 
  -t HOST            (ssldiagnos)    same as ''--host HOST''
 
  --protocol SSL      (ssldiagnos)    same as ''--SSL''
 
  --UDP              (ssldiagnos)    same as ''--udp''
 
  --insecure          (cnark.pl)      ignored
 
  --nopct --nocolor  (ssldiagnos)    ignored
 
  --timeout, --grep  (ssltest.pl)   ignored
 
  -r,  -s,  -t,  -x  (ssltest.pl)    ignored
 
  -connect, -H, -u, -url, -U          ignored
 
  -noSSL                              same as ''--no-SSL''
 
  -no_SSL                            same as ''--no-SSL''
 
--------------------+---------------+---------------------------
 
  
For definition of  <code>SSL</code>  see  ''--SSL''  and  ''--no-SSL''  above.
+
: Note: i.g. there is no need to use this option, as a correct value
 +
: for the SNI name will be choosen automatically (except for IPs).
 +
: However, it is kind of fuzzing ...even setting to an empty string
 +
: is possible.
 +
                                                                             
 +
: Limitation: the same <code>NAME</code> is used for all targets, if more than
 +
: one target was specified.
  
===== Options for customization=====
+
====== --no-cert======
 +
:
 +
:  Do not get data from target's certificate, return empty string.
 +
:
 +
====== --no-cert --no-cert======
 
:
 
:
For general descriptions please see  [[#CUSTOMIZATION|CUSTOMIZATION]] section below.
+
Do not get data from target's certificate, return default string
 +
:  of ''Net::SSLinfo'' (see  ''--no-cert-text TEXT'' option).
 
:
 
:
====== --cfg_cmd=CMD=LIST======
 
  
Redefine list of commands. Sets %cfg{cmd-CMD}  to <code> LIST</code>. Commands
+
====== --no-cert-text=TEXT======
:  are written without the leading <code>+</code>.
+
:
<code>CMD</code>      can be any of:  bsi, check, http, info, quick, sni, sizes
+
Set <code>TEXT</code>  to be returned from <code>Net::SSLinfo.pm</code> if no certificate
: Example:  ''--cfg_cmd=sni=sni hostname''
+
data is collected due to use of  ''--no-cert''.
 
+
:
:  To get a list of commands and their settings, use:
 
  
    o-saft.pl --help=intern
+
====== --ca-depth=INT======
 +
:
 +
:  Check certificate chain to depth  <code>INT</code> (like openssl's -verify).
 +
:
  
Main purpose is to reduce list of commands or print them sorted.
+
====== --ca-file=FILE======
 +
:
 +
:  Use  <code>FILE</code> with bundle of CAs to verify target's certificate chain.
 +
:
  
====== --cfg_score=KEY=SCORE======
+
====== --ca-path=DIR======
 +
:
 +
:  Use  <code>DIR</code>  where to find CA certificates in PEM format.
 +
:
  
Redefine value for scoring. Sets %checks{KEY}{score}  to  SCORE.
+
====== --no-nextprotoneg======
:  Most score values are set to 10 by default. Values <code>0</code> .. <code>100</code> are
+
Do not use <code>-nextprotoneg</code>  option for openssl.
: allowed.
 
  
: To get a list of current score settings, use:
+
====== --proto-alpn=NAME======
 +
:   Name of protocol to be added to list of applcation layer protocols
 +
:    (ALPN), which is used for any connection to the targets.
 +
:   See  ''--cipher-alpn=NAME''  also.
  
    o-saft.pl --help=score
+
====== --proto-npn=NAME======
 +
:    Name of protocol to be added to list of  next protocol negotiations
 +
:    (NPN), which is used for any connection to the targets.
 +
:    See  ''--cipher-npn=NAME''  also.
  
For deatils how scoring works, please see  [[#SCORING| SCORING]]  section.
+
====== --ssl-compression --compression======
 +
Use SSL option "compression" for connection.
  
:  Use the  ''--trace-key'' option for the  ''+info''  and/or  ''+check''
+
====== --no-ssl-compression --no-compression======
:  command to get the values for  KEY.
+
: Use SSL option "no compression" for connection (default: don't use)
  
====== --cfg_checks=KEY=TEXT --cfg_data=KEY=TEXT======
+
====== --no-reconnect======
 +
:  Do not use  <code>-reconnect</code>  option for openssl.
  
:  Redefine texts used for labels in output. Sets  %data{KEY}{txt}  or
+
====== --no-tlsextdebug======
:  %checks{KEY}{txt}  to  TEXT.
 
 
 
:  To get a list of preconfigured labels, use:
 
 
 
    o-saft.pl --help=cfg_checks
 
    o-saft.pl --help=cfg_data
 
 
:
 
:
 +
:  Do not use  <code>-tlsextdebug</code>  option for openssl.
 +
:
 +
====== --sclient-opt=VALUE======
 +
:
 +
:  Argument or option passed to openssl s_client command.
 +
:
 +
===== Options for ''+cipher''  command =====
  
====== --cfg_text=KEY=TEXT======
+
====== --cipher-alpn=NAME======  
  
Redefine general texts used in output. Sets  %text{KEY}  to  <code>TEXT</code>.
+
:   Name of protocol to be added to list of applcation layer protocols
 +
:    (ALPN), which is used for cipher checks.
  
To get a list of preconfigured texts, use:
+
:*    ''--cipher-alpn=,''  sets empty list.
 +
:*    ''--cipher-alpn=,,'' sets list to empty element "".
  
    o-saft.pl --help=cfg_text
+
====== --cipher-npn=NAME======
  
Note that \n, \r and \t are replaced by the corresponding character
+
:   Name of protocol to be added to list of next protocol negotiations
: when read from [[#RC-FILE| RC-FILE]].
+
:   (NPN), which is used for cipher checks.
  
====== --cfg_hint=KEY=TEXT======
+
:*    ''--cipher-lpn=,''  sets empty list.
 +
:*    ''--cipher-lpn=,,''  sets list to empty element "".
  
:Redefine texts used for hints. Sets  %cfg{hints}{KEY}  to TEXT.
+
:   Note:  setting empty list or element most likely does not work with
 +
:    openssl executable (i.e--force-openssl).
  
:To get a list of preconfigured texts, use:
+
====== --cipher-curve=NAME======
  
    o-sat.pl --help=cfg-hint
+
:    Name of ecliptic curve to be added to list of ecliptic curves (EC),
 +
:    which is used for cipher checks.
  
====== --call=METHOD======
+
:*    ''--cipher-curve=,''  sets empty list.
:
+
:*    ''--cipher-curve=,,'' sets list to empty element "".
: See  [[#Options for SSL tool|Options for SSL tool]]
 
:
 
  
====== --usr======
+
:   Notesetting empty list or element most likely does not work with
:
+
:   openssl executable (i.e''--force-openssl'').
Execute functions defined in  o-saft-usr.pm.
 
:
 
====== --experimental======
 
:
 
:  Use experimental functionality.
 
: Some functionality of this tool is  under development and only used
 
:  when this option is given.
 
 
 
===== Options for tracing and debugging=====
 
:
 
====== --n======
 
  
: Do not execute, just show commands (only useful in conjunction with
+
===== Options for cipherall and cipherraw command =====
: using openssl).
 
  
===== Difference --trace vs. --v=====
+
====== --range=RANGE ======
 +
====== --cipherrange=RANGE======
  
:While ''--v''  is used to print more data, ''--trace'' is used to print
+
: Specify range of cipher constants to be tested by ''+cipherall'' .
:more information about internal data such as procedure names and/or
+
: Following <code>RANGE</code>s are supported (see also [[#--cipherrange=RANGE|--cipherrange=RANGE]]):
:variable names and program flow.
+
*  <code>rfc</code>            all ciphers defined in various RFCs
 +
*  <code>shifted</code>        <code>rfc</code>, shifted by 64 bytes to the right
 +
*  <code>long</code>            like <code>rfc</code> but more lazy list of
 +
*  <code>huge</code>            all constants  0x03000000 .. 0x0300FFFF
 +
* <code>safe</code>            all constants  0x03000000 .. 0x032FFFFF
 +
*  <code>full</code>            all constants  0x03000000 .. 0x0300FFFF
 +
*  <code>SSLv2</code>          all ciphers according RFC for SSLv2
  
====== --v======
+
:Note: <code>SSLv2</code> is the internal list used for testing SSLv2 ciphers.
====== --verbose======
+
:It does not make sense to use it for other protocols; however ...
  
:  Print more information about checks.
+
====== --slow-server-delay=SEC======
:
 
:  Note that this option should be first otherwise some debug messages
 
:  are missing.
 
:
 
:  Note that  ''--v''  is different from  ''-v''  (see above).
 
  
====== --v --v======
+
:  Additional delay in seconds  after the server is connected  using a
 +
:  proxy or before starting STARTTLS.
 +
:  This is useful when connecting via  slow proxy chains or connecting
 +
:  to slow servers before sending the STARTTLS sequence.
  
:  Print remotely checked ciphers.
+
====== --ssl-maxciphers=CNT ======
  
====== --v --v --v======
+
:  Maximal number of ciphers sent in a sslhello (default: 32).
  
:  Print remotely checked ciphers one per line.
+
====== --ssl-double-reneg======
  
====== --v --v --v --v======
+
:  Send SSL extension  "reneg_info"  even if list of ciphers includes
 +
:  TLS_EMPTY_RENEGOTIATION_INFO_SCSV (default: do not include)
  
:  Print processed ciphers (check, skip, etc.).
+
====== --ssl-nodata-nocipher======
  
====== --trace======
+
:  Do not abort testing for next cipher when the target  responds with
 +
:  "NoData" times out. Useful for TLS intolerant servers.
 +
:  By default testing for ciphers is aborted  when the target responds
 +
:  with "noData message.
 +
 
 +
====== --ssl-use-ecc======
  
Print debugging messages.
+
Use supported elliptic curves.  Default on.
  
====== --trace --trace======
+
====== --ssl-use-ec-point======
  
Print more debugging messages and pass <code>trace=2</code> to Net::SSLeay and
+
Use TLS "ec_point_formats" extension. Default on.
: Net::SSLinfo.
 
  
====== --trace --trace --trace======
+
====== --ssl-use-reneg======
  
Print more debugging messages and pass <code>trace=3</code> to Net::SSLeay and
+
Test for ciphers with "secure renegotiation" flag set.
Net::SSLinfo.
+
Default: don't set "secure renegotiation" flag.
  
====== --trace --trace --trace --trace======
+
====== --ssl-retry=CNT======
  
Print processing of all command line arguments.
+
Number of retries when connection timed-out (default: 2).
  
====== --trace--======
+
====== --ssl-timeout=SEC======
:
 
====== --trace-arg======
 
  
Print command line argument processing.
+
Number of seconds to wait until connection is qualified as timeout.
  
====== --trace-cmd======
+
====== --dns-mx, --mx======
  
Trace execution of command processing (those given as ''+*'').
+
Get DNS MX records for given target and check the returned targets.
 +
(only useful with ''--starttls=SMTP'')
  
====== --trace@======
+
===== Options for checks and results=====
 
:
 
:
====== --trace-key======
+
:Options used for  ''+check''  command:
 +
:
 +
====== --enabled======
 +
:
 +
:  Only print result for ciphers accepted by target.
 +
:
 +
====== --disabled======
 +
:
 +
:  Only print result for ciphers not accepted by target.
 +
:
 +
====== --ignorecase======
 +
:
 +
:  Checks are done case insensitive.
 +
:
 +
====== --no-ignorecase======
  
Print some internal variable names in output texts (labels).
+
Checks are done case sensitive. Default: case insensitive.
Variable names are prefixed to printed line and enclosed in <code>#</code> .
+
Currently only checks according CN, alternate names in the target's
Example without --trace-key :
+
certificate compared to the given hostname are effected.
      Certificate Serial Number:          deadbeef
 
  
:  Example with    --trace-key :
+
====== --ignore-no-reply======
      #serial#          Certificate Serial Number:          deadbeef
 
:
 
  
====== --trace=VALUE======
+
:When checking for the TLS "heartbeat" extension,  the server may not
 +
:respond at all, which would result in a  "no reply"  message.  This
 +
:marks the check for  ''+heartbleed''  as <code>no</code>.
 +
:I.g.  a server is  not vulnerable to the  heartbleed attack  if the
 +
:TLS "heartbeat" extension is disabled. Hence the check result  <code>no</code>
 +
:may be mis-leading.  This option  treats the  "no reply"  result as
 +
:"not vulnerable" and returns  <code>yes</code>  then.
  
:Trace Option        Alias Option
+
:Note: if the server does not respond for this check, does not mean
* --trace=1                          same as --trace
+
:that the "heartbeat" extension is switched off. If unsure, disable
* --trace=2                          same as --trace --trace
+
:this lazy check with ''--no-ignore-no-reply'' .
*  --trace=arg                        same as --trace-arg
 
*  --trace=cmd                        same as --trace-cmd
 
* --trace=key                        same as --trace-key
 
  
====== --trace-time======
+
===== Options for output format=====
 
:
 
:
:  Prints timestamp in trace output (implies ''--trace-cmd'').
+
====== --label=TYPE======
  
====== --trace=FILE======
+
:  Defines the format of the descriptive text(label) for  ''+check''  and
 +
:  ''+info'' command.
  
Use <code>FILE</code> instead of the default rc-file (.o-saft.pl, see [[#RC-FILE|RC-FILE]]).
+
Following <code>TYPE</code>s are supported:
  
====== --trace-me======
+
====== --label=long======
 +
:Prints full text for labels:
 +
  Certificate Common Name:  some.tld
  
:Print debugging messages for <code>o-saft.pl</code> only, but not any modules.
+
====== --label=short======
 +
:Prints short less descriptive text for labels:
 +
  Common Name:              some.tld
  
====== --trace-not-me======
+
====== --label=key======
 +
:Internal format: print name of key instead of text as label. Key is
 +
:Prints name of key instead of text as label. The key is that of the
 +
:internal data structure(s).
  
:Print debugging messages for modules only, but not <code>o-saft.pl</code> istself.
+
  [cn]                      some.tld
  
====== --trace-sub +traceSUB======
+
====== --legacy=TOOL======
  
Print formatted list of internal functions with their description.
+
For compatibility with other tools,  the output format used for the
Not to be intended in conjunction with any target check.
+
result of the ''+cipher'' command can be adjusted to mimic the format
 +
:  of other SSL testing tools.
  
====== --hint======
+
:  The argument to the ''--legacy=TOOL''  option is the name of the tool
Print hint messages (!!Hint:).
+
to be simulated.
  
====== --no-hint======
+
Following <code>TOOL</code>s are supported:
Do not print hint messages (!!Hint:).
 
  
====== --warning======
+
*  <code>sslaudit</code>        format of output similar to  sslaudit
: Print warning messages (**WARNING:).
+
*  <code>sslcipher</code>      format of output similar to  ssl-cipher-check
 +
*  <code>ssldiagnos</code>      format of output similar to  ssldiagnos
 +
*  <code>sslscan</code>        format of output similar to  sslscan
 +
* <code>ssltest</code>        format of output similar to  ssltest
 +
* <code>ssltestg</code>        format of output similar to  ssltest -g
 +
* <code>ssltest-g</code>      format of output similar to  ssltest -g
 +
*  <code>sslyze</code>          format of output similar to  sslyze
 +
*  <code>ssl-cipher-check</code>      same as sslcipher
 +
*  <code>ssl-cert-check</code>  format of output similar to  ssl-cert-check
 +
*  <code>testsslserver</code>  format of output similar to  TestSSLServer.jar
 +
* <code> thcsslcHeck</code>    format of output similar to  THCSSLCheck
  
====== --no-warning======
+
:  Note that these legacy formats only apply to  output of the checked
Do not print warning messages (**WARNING:).
+
ciphers. Other texts like headers and footers are adapted slightly.
  
====== --exit=KEY======
+
:  Please do not expect identical output as the <code>TOOL</code>  when using these
 +
:  options, it's a best guess and should be parsable in a very similar
 +
:  way.
  
:For debugging only: terminate <code>o-saft.pl</code> at specified <code>KEY</code>.
+
======--legacy=TYPE======
:For <code>KEY</code> please see:  <code>grep exit= o-saft.pl</code>
+
======--legacy=compact======
  
===== Options vs. Commands=====
+
:Internal format: mainly avoid tabs and spaces format is as follows:
 +
Some Label:<-- anything right of colon is data
  
:For compatibility with other programs and lazy users, some arguments
+
======--legacy=full======
:looking like options are silently taken as commands. This means that
 
:''--THIS''  becomes  ''+THIS''  then. These options are:
 
  
:*  ''--help''
+
:Internal format: pretty print each label in its own line, followed
:*  ''--abbr''
+
:by data prepended by tab character (useful for ''+info''  only).
:*  ''--todo''
 
:*  ''--chain''
 
:*  ''--default''
 
:* ''--fingerprint''
 
:* ''--list''
 
:* ''--version''
 
  
:Take care that this behaviour may be removed in future versions as it
+
====== --legacy=owasp======
:conflicts with those options and commands which actually exist, like:
 
  
:*  ''--sni''  vs. ''+sni''
+
:Results for cipher checks use rating from OWASP Cipher Cheat Sheet.
  
==== LAZY SYNOPSIS====
+
======--legacy=quick======
  
===== Commands=====
+
:Internal format: use tab as separator; ciphers are printed with bit
 +
:length (implies ''--tab'').
  
:Following strings are treated as a command instead of target names:
+
======--legacy=simple======
  
:*  ciphers
+
:Internal default format.
:*  s_client
 
:*  version
 
  
:A warning will be printed.
+
====== --format=FORM======
 +
:This option is used to specify the format of the result lines. This
 +
:covers the value of the result line only.
  
===== Options=====
+
*  <code>raw</code>    Print raw data as passed from ''Net::SSLinfo'' .
  
:We support following options, which are all identical, for lazy users
+
:   Note:  all data will be printed as is, without additional label
:and for compatibility with other programs.
+
:    or formatting. It's recommended to use the option in conjunction
 +
:   with exactly one command.  Otherwise the user needs  to know how
 +
:    to "read"  the printed data.
  
====== Option Variants======
+
*  <code>hex</code>    Convert some data to hex: 2 bytes separated by <code>:</code>.
 +
*  <code>0x</code>    Convert some data with hex values:
 +
:                          2 bytes preceded by <code>0x</code> and separated by a space.
 +
*  <code>/x</code>    Same as  ''--format=\x''
 +
*  <code>\x</code>    Convert some data with hex values:
 +
:                          2 bytes preceded by <code>\x</code> and no separating char.
  
:    ''--port PORT''
+
====== --header======
:    ''--port=PORT''
 
 
 
:This applies to most such options,  ''--port''  is just an example.
 
:When used in the [[#RC-FILE|RC-FILE]], the ''--OPTION=VALUE'' variant must be used.
 
 
 
====== Option Names======
 
 
:
 
:
:Dash <code>-</code>, dot <code>.</code>  and/or  underscore <code>_</code> in option names are optional,
+
Print formatting headerDefault for ''+check'', ''+info'', ''+quick''.
:all following are the same:
+
: and  ''+cipher'' only.
:    ''--no.dns''
 
:    ''--no-dns''
 
:    ''--no_dns''
 
:   ''--nodns''
 
:
 
:This applies to all such options, ''--no-dns'' is just an example.
 
 
:
 
:
 +
====== --no-header======
 +
:  Do not print formatting header.
 +
:  Useful if raw output should be passed to other programs.
 +
 +
:  Note: must be used on command line to inhibit all header lines.
  
===== Targets=====
+
======--ignore-cmd=CMD======
 +
======--ignore-output=CMD======
 +
======--no-cmd=CMD======
 +
======--no-output=CMD======
 +
:Do not print output (data or check result) for command <code>CMD</code>.
 +
:<code>CMD</code> is any valid command, see  [[#COMMANDS|COMMANDS]],  without leading <code>+</code>.
 +
:Option can be used multiple times.
 +
 
 +
====== --score======
 +
:
 +
:  Print scoring results. Default for  ''+check''.
 
:
 
:
:Following syntax is supported also:
+
====== --no-score======
 
:
 
:
    o-saft.pl <nowiki>http://some.tld</nowiki> other.tld:3889/some/path?a=b
+
: Do not print scoring results.
 
:
 
:
:Note that only the hostname and the port are used from an URL.
+
====== --separator=CHAR======
 
:
 
:
 
+
====== --sep=CHAR======
===== Options vs. Commands=====
 
 
:
 
:
:See [[#Options vs. Commands|Options vs. Commands]]  in  [[#OPTIONS|OPTIONS]] section above
+
<code>CHAR</code>      will be used as separator between  label and value of the
 +
:      printed results. Default is <code>:</code>
 
:
 
:
  
==== CHECKS====
+
====== --tab======
  
:All SSL related check performed by the tool will be described here.
+
: <code>TAB</code> character (0x09, \t)  will be used  as separator between  label
 +
:      and value of the printed results.
 +
:  As label and value are already separated by a  <code>TAB</code>  character, this
 +
:  options is only useful in conjunction with the   ''--legacy=compact''
 +
:  option.
  
===== General Checks=====
+
====== --showhost======
  
:Lookup the IP of the given hostname (FQDN), and then tries to reverse
+
: Prefix each printed line with the given hostname (target).
:resolve the FQDN again.
+
: The hostname will be followed by the separator character.
  
===== SSL Ciphers=====
+
======--std-format=utf8======                                                 
 +
======--std-format=crlf======
  
:Check which ciphers are supported by target. Please see [[#RESULTS|RESULTS]] for
+
======--std-format=raw======                                                 
:details of this check.
+
======--std-format=unix======                                                 
 +
======--std-format=CHARSET======                                             
 +
                                                                             
 +
:This option is used to specify the general output format for STDOUT         
 +
:and STDERR. All results are written to STDOUT,  errors and warnings         
 +
:may also be written to STDERR .  The default is <code>:unix:utf8</code>, which
 +
:is the perlish definition used internally.                                   
 +
                                                                             
 +
:Following values are supported:                                             
 +
                                                                             
 +
:* <code>raw</code>                                                           
 +
:* <code>unix</code>      Print raw data, binary in bytes without conversion. 
 +
:Note:  binary here just means characters (as all output is text).           
 +
                                                                             
 +
:* <code>utf8</code>      Convert all characters to UTF-8.                   
 +
:* <code>crlf</code>      Use CR LF as end of line.                           
 +
                                                                             
 +
:* <code>CHARSET</code>  <code>CHARSET</code> can be any of the local installed character
 +
:sets, like UTF-8, UTF-16LE, CP1252, iso-8859-7, etc..                       
 +
:This conversion may print its own warnings.                                 
 +
                                                                             
 +
:The option can be used multiple times with different values.                 
 +
:To reset the  default behaviour, either  <code>raw</code>  or  <code>unix</code>  must be
 +
:used. Obviously, they must be used first. All other values are used         
 +
:additionally.                                                               
 +
:Note:  <code>utf8</code> just defines the format of the characters, it does no
 +
:further checks on the converted characters. In contrast, <code>UTF-8</code> is
 +
:used as real encoding and does some checks.                                  
  
===== SSL Connection=====
+
:For more details, please see  "perldoc -f binmode" .
 +
                                                                 
 +
:Currently (Jan. 2018), these options must be used before any ''--help''     
 +
:option.
  
====== heartbeat======
+
====== --win-CR======
  
:Check if heartbead extension is supported by target.
+
:Obsolete, please use  ''--std-format=crlf'' .
  
====== poodle======
+
===== Options for compatibility with other programs=====
  
:Check if target is vulnerable to POODLE attack (SSLv3 enabled).
+
:Please see other programs for detailed description (if not obvious:).
 +
:Note that often only the long form options are accepted  as most short
 +
:form options are ambiguous.
 +
:If other programs use the same option,but with a different behaviour, 
 +
:then thes other options are not supported.                           
 +
:For a list of supported options, please see:
 +
  o-saft.pl --help=alias
  
====== sloth======
+
: Following list contains only those options not shown with:
 +
  o-saft.pl --help=alias
  
:Check if target is vulnerable to SLOTH attack (server offeres RSA-MD5
+
Tool's Option        (Tool)          o-saft.pl Option
:or ECDSA-MD5 ciphers).
+
--------------------+---------------+---------------------------
 +
  --checks CMD        (TLS-Check.pl)  same as ''+CMD''
 +
  -h, -h=HOST        (various tools) same as ''--host HOST''
 +
  -p, -p=PORT        (various tools) same as ''--port PORT''
 +
  -t HOST            (ssldiagnos)    same as ''--host HOST''
 +
  --protocol SSL      (ssldiagnos)    same as ''--SSL''
 +
  --UDP              (ssldiagnos)    same as ''--udp''
 +
  --insecure          (cnark.pl)      ignored
 +
  --nopct --nocolor  (ssldiagnos)    ignored
 +
  --timeout, --grep  (ssltest.pl)   ignored
 +
  -r,  -s,  -t,  -x  (ssltest.pl)    ignored
 +
  -connect, -H, -u, -url, -U          ignored
 +
  -noSSL                              same as ''--no-SSL''
 +
  -no_SSL                            same as ''--no-SSL''
 +
--------------------+---------------+---------------------------
  
====== ALPN======
+
:  For definition of  <code>SSL</code>  see  ''--SSL''  and  ''--no-SSL''  above.
  
:Check if target supports ALPN. Following messages are evaluated:
+
===== Options for customization=====
 +
:
 +
:  For general descriptions please see  [[#CUSTOMIZATION|CUSTOMIZATION]]  section below.
 
:
 
:
    ALPN protocol: h2-14
+
====== --cfg_cmd=CMD=LIST======
    No ALPN negotiated
 
  
===== SSL Vulnerabilities=====
+
:  Redefine list of commands. Sets  %cfg{cmd-CMD}  to <code> LIST</code>.  Commands
 +
:  can be written without the leading  <code>+</code>.
 +
:  If  <code>CMD</code>  is any of the known internal commands, it will be redifned.
 +
:  If  <code>CMD</code>  is a unknown command, it will be created.
  
====== ADH======
+
:  Example:
 +
    ''--cfg_cmd=sni=sni hostname''
  
:Check if ciphers for anonymous key exchange are supported: ADH|DHA .
+
: To get a list of commands and their settings, use:
:Such key exchanges can be sniffed.
 
  
====== EDH======
+
    o-saft.pl --help=intern
  
:Check if ephemeral ciphers are supported: DHE|EDH .
+
: Main purpose is to reduce list of commands or to print them sorted.
:They are necessary to support Perfect Forward Secrecy (PFS).
+
: An example  ''+preload''  can be found in  <code>.o-saft.pl</code> .
  
====== BEAST======
+
====== --cfg_score=KEY=SCORE======
  
:Currently (2015) only a simple check is used: RC4 or CBC ciphers used.
+
: Redefine value for scoring. Sets  %checks{KEY}{score}  to  SCORE.
:Which is any cipher with RC4, ARC4 or ARCFOUR or with CBC.
+
: Most score values are set to 10 by default. Values <code>0</code> .. <code>100</code> are
:TLSv1.2 checks are not yet implemented.
+
: allowed.
  
====== CRIME======
+
:  To get a list of current score settings, use:
  
:Connection is vulnerable if target supports SSL-level compression.
+
    o-saft.pl --help=score
  
====== DROWN======
+
:  For deatils how scoring works, please see  [[#SCORING| SCORING]]  section.
  
:Connection is vulnerable if target supports SSLv2 (with at least one cipher).
+
: Use the  ''--trace-key''  option for the  ''+info''  and/or  ''+check''
 +
:  command to get the values for  KEY.
  
======FREAK======
+
====== --cfg_checks=KEY=TEXT --cfg_data=KEY=TEXT======
  
:Attack Against SSL/TLS to downgrade to EXPORT ciphers.
+
: Redefine texts used for labels in output. Sets  %data{KEY}{txt}  or
:Currently (2015) a simple check is used:  SSLv3 enabled and EXPORT
+
: %checks{KEY}{txt}  to  <code>TEXT</code>.
:ciphers supported by server.
 
: See CVE-2015-0204 and https://freakattack.com/ .
 
  
====== HEARTBLEED======
+
:  To get a list of preconfigured labels, use:
  
:Check if target is vulnerable to heartbleed attack, see CVE-2014-0160
+
    o-saft.pl --help=cfg_checks
:and http://heartbleed.com/ .
+
    o-saft.pl --help=cfg_data
 +
:
 +
 
 +
====== --cfg_text=CIPHER=value======
  
====== Logjam======
+
:  Redefine the security value (i.e. HIGH) in the cipher description.
 +
:  Example:
 +
                                                           
 +
    o-saft.pl --cfg-cipher=NULL-MD5=no-security-at-all ...
  
:Check if target is vulenerable to Logjam attack.
+
====== --cfg_text=KEY=TEXT======
:Check if target suports  EXPORT ciphers  and/or  DH Parameter is less
 
:than 2048 bits.
 
  
====== Lucky 13======
+
:  Redefine general texts used in output. Sets  %text{KEY}  to  <code>TEXT</code>.
  
:Check if CBC ciphers are offered.
+
To get a list of preconfigured texts, use:
:NOTE the recommendation to be safe againts Lucky 13  was to use RC4
 
:ciphers. But they are also subjetc to attacks (see below). Hence the
 
:check is only for CBC ciphers.
 
  
====== RC4======
+
    o-saft.pl --help=cfg_text
  
:Check if RC4 ciphers are supported.
+
: Note that \n, \r and \t are replaced by the corresponding character
:They are assumed to be broken.
+
: when read from [[#RC-FILE| RC-FILE]].
:Note that ''+rc4''  reports the vulnerabilitiy to the RC4 Attack, while
 
:''+rc4_cipher''  simply reports if RC4 ciphers are offered.  However the
 
:the check, and hence the result, is the same.
 
  
====== PFS======
+
====== --cfg_text=FILE======
 +
:Read definitions for  %text{KEY}="my text" from file  <code>FILE</code>.
  
:Check if DHE ciphers are used. Also check if the  TLS session ticket
+
====== --cfg_hint=KEY=TEXT======
:is random or not used at all.
 
:Currently (2015) only a simple check is used: only DHE ciphers used.
 
:Which is any cipher with DHE or ECDHE. SSLv2 does not support PFS.
 
:TLSv1.2 checks are not yet implemented.
 
  
====== POODLE======
+
:Redefine texts used for hints. Sets  %cfg{hints}{KEY}  to <code>TEXT</code>.
  
:Check if target is vulnerable to POODLE attack (just check if  SSLv3
+
:To get a list of preconfigured texts, use:
:is enabled).
 
  
====== Practical Invalid Curve Attack======
+
    o-sat.pl --help=cfg-hint
  
:This attack allows an attacker to read the servers private key if the
+
====== --call=METHOD======
:server does not check properly the passed points for a ecliptic curve
+
:
:when EDH ciphers are used.
+
: See  [[#Options for SSL tool|Options for SSL tool]]
 +
:
  
:This check will not send multiple invalid points,  but only checks if
+
====== --usr======
:the server closes the connection or responds with no matching cipher.
+
:
 +
: Execute functions defined in  o-saft-usr.pm.
  
====== SLOTH======
+
====== --usr-*======
 +
====== --user-*======
  
:Currently (2016) we check for ciphers with ECDSA, RSA-MD5.
+
: Options ignored, but stored as is internal in $cfg{usr-args} .
:Checking the TLS extension 'tls-unique' is not yet implemented.
+
: These options can be used in  o-saft-usr.pm  or  o-saft-dbx.pm.
  
===== Target (server) Configuration and Support=====
+
====== --experimental======
 +
:
 +
:  Use experimental functionality.
 +
:  Some functionality of this tool is  under development and only used
 +
:  when this option is given.
  
====== BEAST, BREACH, CRIME, DROWN, FREAK, Logjam, Lucky 13, POODLE, RC4, SLOTH======
+
===== Options for tracing and debugging=====
 +
:
 +
====== --n  --dry-run======
  
:See above.
+
: Do not execute, just show commands (only useful in conjunction with
 +
:  using openssl).
  
====== Renegotiation======
+
===== Difference --trace vs. --v=====
  
:Check if the server allows client-side initiated renegotiation.
+
:While  ''--v''  is used to print more data, ''--trace'' is used to print
 +
:more information about internal data such as  procedure names and/or
 +
:variable names and program flow.
  
====== Version rollback attacks======
+
====== --v======
 +
====== --verbose======
  
:NOT YET IMPLEMENTED
+
: Print more information about checks.
:Check if the server allows changing the protocol.
+
:
 +
:  Note that this option should be first otherwise some debug messages
 +
:  are missing.
 +
:
 +
:  Note that  ''--v''  is different from  ''-v''  (see above).
  
====== DH Parameter======
+
====== --v --v======
  
:Check if target's DH Parameter is less 512 or  2048 bits.
+
Print remotely checked ciphers.
  
===== Target (server) Certificate=====
+
====== --v-cipher --cipher-v======
 +
:Print remotely checked ciphers.
 +
:In contrast to  ''--v --v''  above,  this just prints the ciphers while
 +
:being checked, but no other verbose messages.
 +
<!-- no longer implemented (8/2015)
 +
====== --v --v --v======
  
====== Certificate Hashes======
+
:  Print remotely checked ciphers one per line.
  
:Check that fingerprint is not MD5.
+
====== --v --v --v --v======
:Check that certificate private key signature is SHA2 or better.
 
  
====== Root CA======
+
:  Print processed ciphers (check, skip, etc.).
 +
-->
  
:Provided certificate by target should not be a Root CA.
+
====== --trace======
  
====== Self-signed Certificate======
+
:  Print debugging messages.
  
:Certificate should not be self-signed.
+
====== --trace --trace======
  
====== IP in CommonName or subjectAltname (RFC6125)======
+
:  Print more debugging messages and pass <code>trace=2</code> to Net::SSLeay and
 +
:  Net::SSLinfo.
  
:NOT YET IMPLEMENTED
+
====== --trace --trace --trace======
  
====== Basic Constraints======
+
:  Print more debugging messages and pass <code>trace=3</code> to Net::SSLeay and
 +
:  Net::SSLinfo.
  
:Certificate extension Basic Constraints should be <code>CA:FALSE</code>.
+
====== --trace --trace --trace --trace======
  
====== OCSP, CRL, CPS======
+
:  Print processing of all command line arguments.
  
:Certificate should contain URL for OCSP and CRL.
+
====== --trace-cli======
 +
:Print complete command line first. Used for internal testing.
  
====== Private Key encyption======
+
====== --trace--======
 +
:
  
:Certificates signature key supports encryption.
+
====== --trace-arg======
  
====== Private Key encyption well known======
+
:  Print command line argument processing.
  
:Certificates signature key encryption algorithm is well known.
+
====== --trace-cmd======
  
====== Public Key encyption======
+
:  Trace execution of command processing (those given as  ''+*'').
  
:Certificates public key supports encryption.
+
====== --trace@======
 +
:
 +
====== --trace-key======
  
====== Public Key encyption well known======
+
:  Print some internal variable names in output texts (labels).
 +
:  Variable names are prefixed to printed line and enclosed in  <code>#</code> .
 +
:  Example without --trace-key :
 +
      Certificate Serial Number:          deadbeef
  
:Certificates public key encryption algorithm is well known.
+
: Example with    --trace-key :
 +
      #serial#          Certificate Serial Number:          deadbeef
 +
:
  
====== Public Key Modulus size======
+
====== --trace=VALUE======
 +
:Alias for  [[#--trace=VALUE|--trace-VALUE]]  options (see above).
  
:Some (historic) SSL implementations are subject to buffer overflow if
+
:Trace Option        Alias Option
:the key exceeds 16384 or 32768 bits. The check is against 16384 bits.
+
*  --trace=1                          same as --trace
 +
*  --trace=2                          same as --trace --trace
 +
*  --trace=arg                        same as --trace-arg
 +
*  --trace=cmd                        same as --trace-cmd
 +
*  --trace=key                        same as --trace-key
  
====== Public Key Modulus Exponent size======
+
====== --trace-time======
 +
:
 +
:  Prints timestamp in trace output. More timestamps are printed if 
 +
:  used together with  ''--trace-cmd''.
  
:The modulus exponent should be <= 65536 as some (mainly historic) SSL
+
====== --trace=FILE======
:implementations may have problems to connect.
 
  
====== Sizes and Lengths of Certificate Settings======
+
:  Use <code>FILE</code> instead of the default [[#RC-FILE|RC-FILE]], i.e. <code>.o-saft.pl</code>.
  
:  Serial Number <= 20 octets (RFC5280, 4.1.2.2.  Serial Number)
+
====== --trace-me======
  
:...
+
:Print debugging messages for <code>o-saft.pl</code> only, but not any modules.
  
====== DV-SSL - Domain Validation Certificate======
+
====== --trace-not-me======
  
:The Certificate must provide:
+
:Print debugging messages for modules only, but not <code>o-saft.pl</code> istself.
* Common Name <code>/CN=</code> field
 
* Common Name <code>/CN=</code> in <code>subject</code>  or <code>subjectAltname</code> field
 
* Domain name in <code>commonName</code> or <code>altname</code> field
 
  
====== EV-SSL - Extended Validation Certificate======
+
====== --hint======
 +
:  Print hint messages (!!Hint:).
  
:This check is performed according the requirements defined by the CA/
+
====== --no-hint======
:Browser Forum  https://www.cabforum.org/contents.html .
+
Do not print hint messages (!!Hint:).
:The Certificate must provide:
 
:*  DV - Domain Validation Certificate (see above)
 
:*  Organization name <code>/O=</code> Cn ''subject'' field
 
:*  Organization name must be less to 64 characters
 
:*  Business Category <code>/businessCategory=</code> in <code>subject</code> field
 
:* Registration Number <code>/serialNumber=</code> in <code>subject</code> field
 
:*  Address of Place of Business in <code>subject</code> field
 
  
:Required are: <code>/C=</code>, <code>/ST=</code>, <code>/L=</code>
+
====== --warning======
 +
:  Print warning messages (**WARNING:).
  
:Optional are: <code>/street=</code>, <code>/postalCode=</code>
+
====== --no-warning======
:* Validation period does not exceed 27 month
+
Do not print warning messages (**WARNING:).
  
:See [[#LIMITATIONS|LIMITATIONS]]  also.
+
====== --exit=KEY======
 +
:Terminate <code>o-saft.pl</code> at specified <code>KEY</code>. Please see [[#TESTING|TESTING]]  below.
  
===== Target (server) HTTP(S) Support=====
+
===== Options vs. Commands=====
====== STS header======
+
 
 +
:For compatibility with other programs and lazy users, some arguments
 +
:looking like options are silently taken as commands. This means that
 +
:''--THIS''  becomes  ''+THIS''  then. These options are:
  
:Using STS is no perfect security. While the very first request using
+
:* ''--help''
:http: is always prone to a MiTM attack, MiTM is possible to following
+
:* ''--abbr''
:requests again, if STS is not well implemented on the server.
+
:* ''--todo''
:* Request with http: should be redirected to https:
+
:* ''--chain''
:* Redirects should use status code 301 (even others will work)
+
:* ''--default''
:* Redirect's Location header must contain schema https:
+
:* ''--fingerprint''
:* Redirect's Location header must redirect to same FQDN
+
:* ''--list''
:* Redirect may use Refresh instead of Location header (not RFC6797)
+
:* ''--version''
:* Redirects from HTTP must not contain STS header
 
:* Answer from redirected page (HTTPS) must contain STS header
 
:* Answer from redirected page for IP must not contain STS header
 
:* STS header must contain includeSubDirectoy directive
 
:* STS header max-age should be less than 1 month
 
  
====== Publix Key Pins header======
+
:Take care that this behaviour may be removed in future versions as it
 +
:conflicts with those options and commands which actually exist, like:
  
:TBD - to be described ...
+
:*  ''--sni''  vs. ''+sni''
  
===== Compliances=====
+
==== LAZY SYNOPSIS====
  
:Note that it is not possible to satisfy all following compliances. Best
+
===== Commands=====
:match is: ''PSF'' and ''ISM'' and ''PCI'' and ''lazy BSI TR-02102-2''.
 
  
:In general it is difficult to  satisfy all conditions of a compliances,
+
:Following strings are treated as a command instead of target names:
:and it is also difficult to check all these conditions. That's why some
 
:of the compliances checks are  not completely implemented,  for details
 
:please see blow.
 
  
:Note that output of results of some checks is disabled in the [[#RC-FILE|RC-FILE]]
+
:* ciphers
:by default. A  "**Hint:" message will be printed, if any of these checks
+
:*  s_client
:are used.
+
:*  version
  
:* FIPS-140
+
:A warning will be printed.
:* ISM
 
:* PCI
 
:* BSI TR-02102
 
:* BSI TR-03116-4
 
:* RFC 6125
 
:* RFC 7525
 
  
======BSI TR-02102-2 (''+bsi-tr-02102+'' ''+bsi-tr-02102-'' ''+bsi'')======
+
===== Options=====
  
:Checks if connection and ciphers are compliant according TR-02102-2,
+
:We support following options, which are all identical, for lazy users
:see https://www.bsi.bund.de/SharedDocs/Downloads/DE/BSI/Publikationen
+
:and for compatibility with other programs.
:/TechnischeRichtlinien/TR02102/BSI-TR-02102-2_pdf.pdf?__blob=publicationFile
 
  
:(following headlines are taken from there)
+
====== Option Variants======
  
:*  3.2.1 Empfohlene Cipher Suites
+
:   ''--port PORT''
 +
:    ''--port=PORT''
  
:* 3.2.2 Übergangsregelungen
+
:This applies to most such options, ''--port''  is just an example.
 +
:When used in the [[#RC-FILE|RC-FILE]], the ''--OPTION=VALUE'' variant must be used.
  
:   RC4 allowed temporary for TLS 1.0. Only if TLS 1.1 and  TLS 1.2
+
====== Option Names======
:    cannot be supported.
+
:
 
+
:Dash <code>-</code>, dot <code>.</code> and/or underscore  <code>_</code>  in option names are optional,
:*  3.2.3 Mindestanforderungen für Interoperabilität
+
:all following are the same:
 
+
:    ''--no.dns''
:    Must at least support: ECDHE-ECDSA-* and ECDHE-RSA-*
+
:   ''--no-dns''
 
+
:    ''--no_dns''
:*  3.3 Session Renegotation
+
:    ''--nodns''
 
+
:
:   Only server-side (secure) renegotiation allowed (see RFC5280).
+
:This applies to all such options, ''--no-dns'' is just an example.
 +
:
  
:*  3.4 Zertifikate und Zertifikatsverifikation
+
===== Targets=====
 +
:
 +
:Following syntax is supported also:
 +
:
 +
    o-saft.pl <nowiki>http://some.tld</nowiki> other.tld:3889/some/path?a=b
 +
:
 +
:Note that only the hostname and the port are used from an URL.
 +
:
  
:   Must have <code>CRLDistributionPoint</code> or <code>AuthorityInfoAccess</code>.
+
===== Options vs. Commands=====
 +
:
 +
:See  [[#Options vs. Commands|Options vs. Commands]]  in  [[#OPTIONS|OPTIONS]]  section above
 +
:
  
:    MUST have <code>OCSP URL</code>.
+
==== CHECKS====
  
:   <code>PrivateKeyUsage</code> must not exceed three years for certificate and
+
:All SSL related check performed by the tool will be described here.
:    must not exceed five years for CA certificates.
 
  
:    <code>Subject</code>,  <code>CommonName</code>  and  <code>SubjectAltName</code>  must not contain
+
===== General Checks=====
:    a wildcard.
 
  
:   Certificate itself must be valid according dates if validity.
+
:Lookup the IP of the given hostname (FQDN), and then tries to reverse
:    Note that  the validity check relies on the years provided by the
+
:resolve the FQDN again.
:    certificate's  <code>before</code>  and <code>after</code>  values only. For example a
 
:    certificate valid  from Jan 2013 to Mar 2016  is considered valid
 
:   even the validity is more than three years.
 
  
:    All certificates in the chain must be valid.
+
===== SSL Ciphers=====
:    **NOT YET IMPLEMENTED**
 
  
:   Above conditions are not required for lazy checks.
+
:Check which ciphers are supported by target. Please see [[#RESULTS|RESULTS]] for
 +
:details of this check.
  
:*  3.5 Domainparameter und Schlüssellängen
+
===== SSL Connection=====
  
:    **NOT YET IMPLEMENTED**
+
====== heartbeat======
  
:*  3.6 Schlüsselspeicherung
+
:Check if "heartbead" extension is supported by target.
  
:    This requirement is not testable from remote.
+
====== poodle======
  
:*  3.7 Umgang mit Ephemeralschlüsseln
+
:Check if target is vulnerable to POODLE attack (SSLv3 enabled).
  
:    This requirement is not testable from remote.
+
====== robot======
  
:*  3.8 Zufallszahlen
+
:Check if target is vulnerable to ROBOT attack (server offers ciphers
 +
:with RSA encryption).
  
:    This requirement is not testable from remote.
+
====== sloth======
  
======BSI TR-03116-4 (''+bsi-tr-03116+'' ''+bsi-tr-03116-'' ''+bsi'')======
+
:Check if target is vulnerable to SLOTH attack (server offeres RSA-MD5
:Checks if connection and ciphers are compliant according TR-03116-4,
+
:or ECDSA-MD5 ciphers).
:see https://www.bsi.bund.de/SharedDocs/Downloads/DE/BSI/Publikationen
 
:/TechnischeRichtlinien/TR03116/BSI-TR-03116-4.pdf?__blob=publicationFile
 
  
:(following headlines are taken from there)
+
====== sweet32======
  
:* 2.1.1 TLS-Versionen und Sessions
+
:Check if target is vulnerable to Sweet32 attack  (server offers CBC or
 +
: CBC3 or DES or 3DES ciphers).
  
:Allows only TLS 1.2.
+
:Note that FIPS-140 compliance requires 3DES ciphers, hence compliant
 +
:systems are then vulnerable to Sweet32 attacks.
  
:* 2.1.2 Cipher Suites
+
====== ALPN======
  
:Cipher suites must be ECDHE-ECDSA or -RSA with AES128 and SHA265.  
+
:Check if target supports ALPN. Following messages are evaluated:
:For curiosity, stronger cipher suites with AES256 and/or SHA384 are
+
:
:not not allowed. To follow this curiosity the ''+bsi-tr-03116-'' (lazy)
+
    ALPN protocol: h2-14
:check allows the stronger cipher suites ;-)
+
    No ALPN negotiated
  
:* 2.1.1 TLS-Versionen und Sessions
+
: Please see also  CHECKS [[#ALPN and NPN|ALPN and NPN]]  below.
  
:The TLS session lifetime must not exceed 2 days.
+
===== SSL Vulnerabilities=====
  
:* 2.1.4.2 Encrypt-then-MAC-Extension
+
====== ADH======
  
:* 2.1.4.3 OCSP-Stapling
+
:Check if ciphers for anonymous key exchange are supported: ADH|DHA .
 +
:Such key exchanges can be sniffed.
  
:MUST have <code>OCSP Stapling URL</code>.
+
====== EDH======
  
:* 4.1.1 Zertifizierungsstellen/Vertrauensanker
+
:Check if ephemeral ciphers are supported: DHE|EDH .
 +
:They are necessary to support Perfect Forward Secrecy (PFS).
  
:Certificate must provide all root CAs. (NOT YET IMPLEMENTED).
+
====== BEAST======
  
:Should use a small certificate trust chain.
+
:Check if ciphers with CBC for protocol SSLv1, SSLv3 or TLSv1 are used.
 +
:TLSv1.2 checks are not yet implemented.
  
:* 4.1.2 Zertifikate
+
====== CRIME======
  
:Must have <code>CRLDistributionPoint</code> or <code>AuthorityInfoAccess</code>.
+
:Connection is vulnerable if target supports SSL-level compression.
  
:End-user certificate must not be valid longer than 3 years.
+
====== DROWN======
:Root-CA certificate must not be valid longer than 5 years.
 
  
:Certificate extension <code>pathLenConstraint</code> must exist, and should be
+
:Connection is vulnerable if target supports SSLv2 (with at least one cipher).
:a small value ("small" is not defined).
 
  
:All certificates must contain the extension <code>KeyUsage</code>.
+
======FREAK======
  
:Wildcards for <code>CN</code> or <code>Subject</code> or <code>SubjectAltName</code> are not allowed
+
:Attack Against SSL/TLS to downgrade to EXPORT ciphers.
:in any certificate.
+
:Currently (2018) a simple check is used:  SSLv3 enabled and EXPORT
 +
:ciphers supported by server.
 +
: See CVE-2015-0204 and https://freakattack.com/ .
  
:EV certificates are recommended (NOT YET checked properly).
+
====== HEARTBLEED======
  
:* 4.1.3 Zertifikatsverifikation
+
:Check if target is vulnerable to heartbleed attack, see CVE-2014-0160
 +
:and http://heartbleed.com/ .
  
:Must verify all certificates in the chain down to their root-CA.
+
====== HEIST======
:(NOT YET IMPLEMENTED).
 
  
:Certificate must be valid according issue and expire date.
+
:Not implemented.
  
:All Checks must be doen for all certificates in the chain.
+
:There are no checks for the HEIST attack implemented, because this is
 +
:an attack on TCP/IP rather than SSL/TLS on top of TCP/IP.
  
:* 4.1.4 Domainparameter und Schlüssellängen
+
====== KCI======
  
:This requirement is not testable from remote.
+
:Not implemented.
  
:* 4 5.2 Zufallszahlen
+
:To perform a MiTM attack with Key Compromise Impersonation, the atta-
 +
:cker needs to engage the victim to install and use a client certificate.
 +
:This is considered a low risk and hence not tested here.
  
:This requirement is not testable from remote.
+
====== Logjam======
  
======RFC 6125 (''+rfc6125'')======
+
:Check if target is vulenerable to Logjam attack.
:Checks values <code>CommonName</code>, <code>Subject</code> and <code>SubjectAltname</code> of the
+
:Check if target suports  EXPORT ciphers  and/or DH Parameter is less
:certificate for:
+
:than 2048 bits.
:* must all be valid characters for DNS
 
:* must not contain more than one wildcards
 
:* must not contain invalid wildcards
 
:* must not contain invalid IDN characters
 
  
======RFC 7525 (''+rfc7525'') ======
+
====== Lucky 13======
:Checks if connection and ciphers are compliant according RFC 7525.
 
:See http://tools.ietf.org/rfc/rfc7525.txt
 
:(following headlines are taken from there)
 
  
:* 3.1.1. SSL/TLS Protocol Versions
+
:Check if CBC ciphers are offered.
 +
:NOTE the recommendation to be safe againts  Lucky 13  was to use RC4
 +
:ciphers. But they are also subjetc to attacks (see below). Hence the
 +
:check is only for CBC ciphers.
  
:SSLv2 and SSLv3 must not be supportetd.
+
====== RC4======
:TLSv1 should only be supported if there is no TLSv1.1 or TLSv1.2.
 
:Either TLSv1.1 or TLSv1.2 must be supported, prefered is TLSv1.2.
 
  
:* 3.1.2DTLS Protocol Versions
+
:Check if RC4 ciphers are supported.
 +
:They are assumed to be broken.
 +
:Note that  ''+rc4''  reports the vulnerabilitiy to the RC4 Attack, while
 +
:''+rc4_cipher''  simply reports if RC4 ciphers are offeredHowever the
 +
:the check, and hence the result, is the same.
  
:DTLSv1 and DTLSv1.1 must not be supported.
+
====== PFS======
  
:* 3.1.3. Fallback to Lower Versions
+
:Check if DHE ciphers are used. Also check if the  TLS session ticket
 +
:is random or not used at all.
 +
:Currently (2018) only a simple check is used: only DHE ciphers used.
 +
:TLSv1.2 checks are not yet implemented.
  
:(check implecitely done by 3.1.1, see above)
+
====== POODLE======
  
:* 3.2.  Strict TLS
+
:Check if target is vulnerable to POODLE attack (just check if  SSLv3
 +
:is enabled).
  
:Check if server provides Strict Transport Security.
+
====== Practical Invalid Curve Attack======
:(STARTTLS check NOT YET IMPLEMENTED).
 
  
:* 3.3.  Compression
+
:This attack allows an attacker to read the servers private key if the
 +
:server does not check properly the passed points for a ecliptic curve
 +
:when EDH ciphers are used.
  
:Compression on TLS must not be supported.
+
:This check will not send multiple invalid points,  but only checks if
 +
:the server closes the connection or responds with no matching cipher.
  
:* 3.4.  TLS Session Resumption
+
====== ROBOT======
 +
:Bleichebacher's Oracle attack against SSL/TLS ciphers.
  
:Server must support resumtion and random session tickets.
+
:Not implemented.
:(Randomnes of session tickets implemented YET experimental.)
+
: https://robotattack.org/
  
:Check if ticket is authenticated and encrypted NOT YET IMPLEMENTED.
+
====== SLOTH======
  
:* 3.5. TLS Renegotiation
+
:Currently (2016) we check for ciphers with  ECDSA, RSA-MD5.
 +
:Checking the TLS extension 'tls-unique' is not yet implemented.
  
:Server must support renegotiation.
+
====== Sweet32======
 +
:Currently (2016) we check for ciphers with CBC or CBC3 or DES or 3DES.
  
:* 3.6.  Server Name Indication
+
===== Target (server) Configuration and Support=====
  
:(Check for SNI support implemented experimental.)
+
====== BEAST, BREACH, CRIME, DROWN, FREAK, Logjam, Lucky 13, POODLE, RC4, ROBOT, SLOTH, Sweet32======
  
:* 4. Recommendations: Cipher Suites
+
:See above.
  
:* 4.1.  General Guidelines
+
====== Renegotiation======
:* 4.2.  Recommended Cipher Suites
 
  
:Check for recommended ciphers.
+
:Check if the server allows client-side initiated renegotiation.
  
:* 4.3.  Public Key Length
+
====== Version rollback attacks======
  
:DH parameter must be at least 256 bits or 2048 its with EC.
+
:NOT YET IMPLEMENTED
:(Check currently, 4/2016, based on openssl which may not provide DH
+
:Check if the server allows changing the protocol.
: parameters for all ciphers.)
 
  
:* 4.5. Truncated HMAC
+
====== DH Parameter======
 +
:Check if target's DH Parameter is less 512  or  2048 bits.
  
:TLS extension "truncated hmac" must not be used.
+
====== SSTP======
 +
:Check if target supports SSTP by accepting method SSTP_DUPLEX_POST.
  
:* 6.  Security Considerations
+
:The check does not send other methods (like CONNECT) to verify if the
:* 6.1. Host Name Validation
+
:protocol is fully supported.
  
:Given hostname must matches hostname in certificate's subject.
+
:Supporting SSTP is considered insecure, because SSTP allows to tunnel
 +
:other, probably insecure, protocols.
  
:* 6.2.  AES-GCM
+
===== Target (server) Certificate=====
:* 6.3.  Forward Secrecy
 
:* 6.4.  Diffie-Hellman Exponent Reuse
 
:(NOT YET IMPLEMENTED).
 
  
:* 6.5.  Certificate Revocation
+
====== Certificate Hashes======
  
:OCSP and CRL Distrbution Point in cetificate must be defined.
+
:Check that fingerprint is not MD5.
 +
:Check that certificate private key signature is SHA2 or better.
  
==== OUTPUT====
+
====== Root CA======
  
:All output is designed to make it  easily parsable by postprocessors.
+
:Provided certificate by target should not be a Root CA.
:Following rules are used:
 
  
:*  Lines for formatting or header lines start with <code>=</code>.
+
====== Self-signed Certificate======
:*  Lines for verbosity or tracing start with <code>#</code>.
 
:*  Errors and warnings start with <code>**</code>.
 
:*  Empty lines are comments ;-)
 
:*  Label texts end with a separation character; default is  <code>:</code>.
 
:*  Label and value for all checks are separated by  at least one  TAB :character.
 
:*  Texts for additional information are enclosed in  <code><<</code>  and  <code>>></code>.
 
:*  <code>N/A</code> is used when no proper informations was found or provided.
 
  
:   Replace  <code>N/A</code> by whatever you think is adequate:  "No answer",
+
:Certificate should not be self-signed.
:    "Not available",  "Not applicable",  ...
 
  
:When used in  ''--legacy=full''  or  ''--legacy=simple''  mode, the output
+
====== FQDN is listed in subjectAltname (RFC2818) ======     
:may contain formatting lines for better (human) readability.
 
  
===== Postprocessing Output=====
+
:The FQDN must be listed in the certificates subjectAltname. 
 +
:The check command  ''+rfc_2818_names''  is based on the info command     
 +
:''+verify_hostname'' . The check was added in 05/2017 because browsers
 +
:started to complain if the FQDN is not part of the subjectAltname.
  
:It is recommended to use the  ''--legacy=quick''  option, if the output
+
====== IP in CommonName or subjectAltname (RFC6125)======
:should be postprocessed, as it omits the default separation character
 
:(<code>:</code> , see above) and just uses on single tab character (0x09, \t  or
 
:TAB) to separate the label text from the text of the result. Example:
 
        Label of the performed checkTABresult
 
  
:More examples for postprocessing the output can be found here:
+
:NOT YET IMPLEMENTED
:    https://github.com/OWASP/O-Saft/blob/master/contrib
 
  
==== CUSTOMIZATION====
+
====== Basic Constraints======
:This tools can be customized as follows:
 
  
*  Using command line options
+
:Certificate extension Basic Constraints should be <code>CA:FALSE</code>.
  
:    This is a simple way to redefine  specific settings.  Please  see
+
====== OCSP, CRL, CPS======
:    [[#CONFIGURATION OPTIONS|CONFIGURATION OPTIONS]]  below.
 
  
*  Using Configuration file
+
:Certificate should contain URL for OCSP and CRL.
  
:    A configuration file can contain multiple configuration settings.
+
====== Private Key encyption======
:    Syntax is simply  KEY=VALUE. Please see [[#CONFIGURATION FILE|CONFIGURATION FILE]] below.
 
  
*  Using resource files
+
:Certificates signature key supports encryption.
  
:    A resource file can contain multiple command line options. Syntax
+
====== Private Key encyption well known======
:    is the same as for command line options iteself.  Each  directory
 
:    may contain its own resource file. Please see  [[#RC-FILE|RC-FILE]]  below.
 
  
*  Using debugging files
+
:Certificates signature key encryption algorithm is well known.
  
:    These files are --nomen est omen-- used for debugging purposes.
+
====== Public Key encyption======
:    However, they can be (mis-)used to redefine all settings too.
 
:    Please see  [[#DEBUG-FILE|DEBUG-FILE]]  below.
 
  
*  Using user specified code
+
:Certificates public key supports encryption.
  
:    This file contains  user specified  program code.  It can also be
+
====== Public Key encyption well known======
:    (mis-)used to redefine all settings. Please see [[#USER-FILE|USER-FILE]]  below.
 
  
:Customization is done by redefining values in internal data structure
+
:Certificates public key encryption algorithm is well known.
:which are:  %cfg,  %data,  %checks,  %text,  %scores .
 
  
:Unless used in  [[#DEBUG-FILE|DEBUG-FILE]]  or  [[#USER-FILE|USER-FILE]],  there is  no need to know
+
====== Public Key Modulus size======
:these internal data structures or the names of variables; the options
 
:will set the  proper values.  The key names being part of the option,
 
:are printed in output with the  ''--trace-key''  option.
 
  
:I.g. texts (values) of keys in  %data are those used in output of the
+
:Some (historic) SSL implementations are subject to buffer overflow if
:<code>Informations</code> section. Texts of keys in  %checks are used for output
+
:the key exceeds 16384 or 32768 bits. The check is against 16384 bits.
:in <code>Performed Checks</code> section.  And texts of keys in  %text  are used
 
:for additional information lines or texts (mainly beginning with <code>=</code>).
 
  
====== Configuration File vs. RC-FILE vs. DEBUG-FILE======
+
====== Public Key Modulus Exponent size======
  
*  CONFIGURATION FILE
+
:The modulus exponent should be = 65537 as it is a prime number and an
 +
:easy to calculate exponent.
 +
:If the exponent is less than 65537, "Boradcast" attacks are possible.
  
:   Configuration Files must be specified with one of the  ''--cfg_*''
+
:However, some (mainly historic) SSL implementations may have problems
:   options. The specified file can be a valid path. Please note that
+
:to connect because they are not able to do the crypt mathematics with
:   only the characters:  a-zA-Z_0-9,.\/()-  are allowed as pathname.
+
:exponenents larger than 65536.
:   Syntax in configuration file is:  <code>KEY=VALUE</code>  where <code>KEY</code> is any
+
                                                                             
:    key as used in internal data structure.
+
:If ecliptic curves are used, the result for these checks is always
:    the keys in output).
+
:<code>no (<<N/A ...)</code>.
  
*  RC-FILE
+
====== Sizes and Lengths of Certificate Settings======
  
:   Resource files are searched for and used automatically.
+
: Serial Number <= 20 octets (RFC5280, 4.1.2.2.  Serial Number)
:    For details see [[#RC-FILE|RC-FILE]] below.
 
  
*  DEBUG-FILE
+
:...
  
:    Debug files are searched for and used automatically.
+
====== DV-SSL - Domain Validation Certificate======
:    For details see [[#DEBUG-FILE|DEBUG-FILE]] below.
 
  
USER-FILE
+
:The Certificate must provide:
 +
* Common Name <code>/CN=</code> field
 +
* Common Name <code>/CN=</code> in <code>subject</code> or <code>subjectAltname</code> field
 +
* Domain name in <code>commonName</code> or <code>altname</code> field
  
:    The user program file is included only if the  ''--usr'' option was
+
====== EV-SSL - Extended Validation Certificate======
:    used. For details see  [[#USER-FILE|USER-FILE]]  below.
 
  
===== CONFIGURATION OPTIONS=====
+
:This check is performed according the requirements defined by the CA/
:Configuration options are used to redefine texts and labels or score
+
:Browser Forum  https://www.cabforum.org/contents.html .
:settings used in output. The options are:
+
:The Certificate must provide:
 +
:*  DV - Domain Validation Certificate (see above)
 +
:*  Organization name <code>/O=</code> Cn ''subject'' field
 +
:*  Organization name must be less to 64 characters
 +
:*  Business Category <code>/businessCategory=</code> in <code>subject</code> field
 +
:*  Registration Number <code>/serialNumber=</code> in <code>subject</code> field
 +
:* Address of Place of Business in <code>subject</code> field
 +
 
 +
:Required are: <code>/C=</code>, <code>/ST=</code>, <code>/L=</code>
  
:*  ''--cfg-cmd=KEY=LIST''
+
:Optional are: <code>/street=</code>, <code>/postalCode=</code>
:*  ''--cfg-checks=KEY=TEXT''
+
:*  Validation period does not exceed 27 month
:*  ''--cfg-data=KEY=TEXT''
 
:*  ''--cfg-hint=KEY=TEXT''
 
:*  ''--cfg-text=KEY=TEXT''
 
  
:Here <code>KEY</code> is the key used in the internal data structure and <code>TEXT</code>
+
:See [[#LIMITATIONS|LIMITATIONS]] also.
:is the value to be set for this key. Note that  unknown keys will be
 
:ignored silently.
 
  
:If  <code>KEY=TEXT</code>  is an exiting filename,  all lines from that file are
+
===== Target (server) HTTP(S) Support=====
:read and set. For details see [[#CONFIGURATION FILE|CONFIGURATION FILE]]  below.
+
====== STS header (see RFC 6797)======
  
:NOTE that such configuration options should be used before any ''--help''
+
:Using STS is no perfect security.  While the very first request using
:or  ''--help=*''  option, otherwise the changed setting is not visible.
+
:http: is always prone to a MiTM attack, MiTM is possible to following
 +
:requests again, if STS is not well implemented on the server.
 +
:* Request with http: should be redirected to https:
 +
:* Redirects should use status code 301 (even others will work)
 +
:* Redirect's Location header must contain schema https:
 +
:* Redirect's Location header must redirect to same FQDN
 +
:* Redirect may use Refresh instead of Location header (not RFC6797)
 +
:* Redirects from HTTP must not contain STS header
 +
:* Answer from redirected page (HTTPS) must contain STS header
 +
:* Answer from redirected page for IP must not contain STS header
 +
:* STS header must contain includeSubDirectoy directive
 +
:* STS header max-age should be less than 1 month
 +
:* STS must not be set in http-equiv attribute of a meta TAG
  
===== CONFIGURATION FILE=====
+
====== STS header preload attribute (''+preload'')======                           
 +
                                                                             
 +
:To satisfy the requirements on  <code>https://hstspreload.appspot.com/</code>  the 
 +
:HSTS header must:                                                     
 +
:* have the max-age with at least 18 weeks (10886400 seconds)       
 +
:* have the includeSubDomains attribute                             
 +
:* have the preload attribute                                       
 +
:* redirect to https first, then to sub-domains (if redirected)     
 +
:* have an HSTS header in each redirect to https.                   
 +
                                                                             
 +
:Additionally, the site must have:                                     
 +
:* a valid certificate                                               
 +
:* serve all subdomains over https.                                 
 +
                                                                             
 +
:Except the last requirement,  ''+preload''  will do the checks.
 +
:Note that  ''+preload''  is defined in  <code>.o-saft.pl</code>  only.
  
:Note that the file can contain  <code>KEY=TEXT</code>  pairs for any kind of the
+
====== Public Key Pins header======
:configuration as given by the  ''--cfg_CFG''  option.
 
  
:For example when used  with  ''--cfg_text=file'' only values for  %text
+
:TBD - to be described ...
:will be set, when used  with  ''--cfg_data=file'' only values for %data
 
:will be set, and so on. <code>KEY</code>  is not used when  <code>KEY=TEXT</code>  is an existing
 
:filename. Though, it's recommended to use a non-existing key, i.e.:
 
:''--cfg-text=my_file=some/path/to/private/file'' .
 
  
===== RC-FILE=====
+
===== Sizes =====
  
:The rc-file will be searched for in the working directory only.
+
:Mainly in the certificate various counts, lengths and sizes of values
 +
:are checked and reported. All commands for these checks start with
 +
:<code>+cnt_</code>  or  <code>+len_</code>.  Up to now, there is no  <code>yes</code>  or  <code>no</code>  value
 +
:for these checks.
  
:The name of the rc-file is the name of the program file prefixed by a
+
:Following commands will check the value to be in  a specific range to
:<code>.</code>  (dot),  for example: <code>.o-saft.pl</code>.
+
:become  <code>yes</code>  or <code>no</code>:
 +
:* +sts_maxage1d      - yes if HSTS maxage < 1 day
 +
:* +sts_maxage1m      - yes if HSTS maxage < 1 month
 +
:* +sts_maxage1y      - yes if HSTS maxage < 1 year
 +
:* +sts_maxage18      - yes if HSTS maxage < 18 weeks (5 months)
 +
:* +sts_maxagexy      - yes if HSTS maxage > 1 year
 +
:* +modulus_exp_1      - Public Key Modulus Exponent <>1
 +
:* +modulus_exp_65537  - Public Key Modulus Exponent =65537
 +
:* +modulus_exp_oldssl - Public Key Modulus Exponent <65537
 +
:* +modulus_size_oldssl - Public Key Modulus <16385 bits
  
:A  rc-file  can contain any of the commands and options valid for the
+
:For some details of these checks, please see the description above at
:tool itself. The syntax for them is the same as on command line. Each
+
:   "Public Key Modulus Exponent size"
:command or option must be in a single line. Any empty or comment line
 
:will be ignored. Comment lines start with  <code>#</code>  or  <code>=</code>.
 
  
:Note that options with arguments must be used as <code>KEY=VALUE</code>  instead
+
:The recommendations for  DH parameters (RSA and ecliptice curve)  are
:of  <code>KEY VALUE</code>.
+
:are checked as follows:
 +
:* +dh_512            - DH Parameter >= 512 bits
 +
:* +dh_2048            - DH Parameter >= 2048 bits
 +
:* +ecdh_256          - DH Parameter >= 256 bits (ECDH)
 +
:* +ecdh_512          - DH Parameter >= 512 bits (ECDH)
 +
:Note that only one of the checks  <code>+dh_*</code>  and <code>+ecdh_*</code>  can return
 +
:<code>yes</code>.
  
:Configurations options must be written like <code><--cfg-CFG=KEY=VALUE</code>
+
===== ALPN and NPN=====
:where "CFG" is any of:  cmd, check, data, text or score  and "KEY is
 
:any key from internal data structure (see above).
 
  
:All commands and options given on command line will overwrite those
+
:The commands for the checks to report  <code>yes</code>  or  <code>no</code>, are  ''+hasalpn''
:found in the rc-file.
+
:and  ''+hasnpn''.
 +
:
 +
:Both, the Application Layer Protocol Negotiation (ALPN) and the  Next
 +
:Protocol Negotiation (NPN) will be tested. The commands for that are:
 +
:* +alpns
 +
:* +npns
 +
:
 +
:Each, ALPN and NPN, is tested separately with all known protocols.
 +
:The test sets only one protocol,  tries to make a connection and then
 +
:checks if the protocol was accepted by the server. The collected list
 +
:of protocols will be printed with the aforementioned commands, or the
 +
:''+info''  command. Note the difference for the commands  ''+next_protocols''
 +
:and  ''+alpns'', where  ''+next_protocols''  simply reports what the server
 +
:itself advertises, while  ''+alpns''  reports what the server supports if
 +
:asked for.
  
===== DEBUG-FILE=====
+
===== Compliances=====
  
:All debugging functionality is defined in ''o-saft-dbx.pm'', which will
+
:Note that it is not possible to satisfy all following compliances. Best
:be searched for using paths available in perl's  <code>@INC</code>  variable.
+
:match is: ''PSF'' and ''ISM'' and ''PCI'' and ''lazy BSI TR-02102-2''.
  
: Syntax in this file is perl codeFor details see [[#DEBUG|DEBUG]]  below.
+
:In general it is difficult to  satisfy all conditions of a compliances,
 +
:and it is also difficult to check all these conditions. That's why some
 +
:of the compliances checks are not completely implemented,  for details
 +
:please see blow.
  
===== USER-FILE=====
+
:Note that output of results of some checks is disabled in the  [[#RC-FILE|RC-FILE]]
 +
:by default. A  "!!Hint:"  message will be printed, if any of these checks
 +
:are used.
  
:All user functionality is defined in  ''o-saft-usr.pm'',  which will be
+
:* FIPS-140
:searched for using paths available in perl's  <code>@INC</code>  variable.
+
:* ISM
 +
:* PCI
 +
:* BSI TR-02102 (2016-01)
 +
:* BSI TR-03116-4
 +
:* RFC 2818
 +
:* RFC 6125
 +
:* RFC 6797
 +
:* RFC 7525
  
: Syntax in this file is perl code.
+
======BSI TR-02102-2 (''+tr-02102+'' ''tr-02102-'' ''+bsi'')======
  
:All functions defined in  ''o-saft-usr.pm''  are called when the option
+
:Checks if connection and ciphers are compliant according TR-02102-2,
:''--usr''  was given. The functions are defined as empty stub, any code
+
:see https://www.bsi.bund.de/SharedDocs/Downloads/DE/BSI/Publikationen
:can be inserted as need.  Please see  ''perldoc o-saft-usr.pm''  to see
+
:/TechnischeRichtlinien/TR02102/BSI-TR-02102-2_pdf.pdf?__blob=publicationFile
:when and how these functions are called.
+
 
 +
:(following headlines are taken from TR-02102-2 Version 2016-01)
  
===== SHELL TWEAKS=====
+
:*  3.1.3 Schlüssellängen bei EC-Verfahren                                       
 +
                                                                             
 +
:*  3.2  SSL/TLS_Versionen                                                     
 +
                                                                             
 +
:    Only TLSv1.2 allowed (except for ''+tr-02102-''  which also allows           
 +
:    TLSv1.1)                                                                     
 +
                                                                             
 +
:*  3.3.1 Empfohlene Cipher Suites                                               
 +
                                                                             
 +
:    Allows only *DHE-*-SHA256, *DHE-*-SHA384, *DH-*-SHA256 and                   
 +
:    *DH-*-SHA384 ciphers and PSK ciphers with ephermeral keys.                   
 +
:    For  ''+tr-02102+''  they must be AES-GCM,  ''+tr02102-'' also allows       
 +
:    AES-CBC.                                                                     
 +
                                                                             
 +
:*  3.3.2 Übergangsregelungen                                                   
 +
                                                                             
 +
:    SHA1 temporary allowed. SHA256 and SHA384 recommended.                       
 +
:    RC4 not reocmmended.                                                         
 +
:    Use of SHA1 will only be checked for  ''+tr-02102+''
  
:Configurering the shell environment where the tool is startet, is not
+
:*  3.4.1 Session Renegotation
:not really a task for the tool itself, but it can simplify your life,
 
:somehow.
 
  
:There exist customizations for some commonly used shells,  please see
+
:   Only server-side (secure) renegotiation allowed (see RFC5280).
:the files in the ./contrib/ directory.
 
  
==== CIPHER NAMES====
+
:*  3.4.2 Verkürzung der HMAC-Ausgabe                                           
 +
                                                                             
 +
:    Truncated HMAC according RFC 6066 not recommended.                           
 +
                                                                             
 +
:*  3.4.3 TLS-Kompression und der CRIME-Angriff                                 
 +
                                                                             
 +
:    No TLS compression.                                                         
 +
                                                                             
 +
:*  3.4.4 Der Lucky 13-Angriff                                                   
 +
:*  3.4.5 Die "Encrypt-thn-MAC"-Erweiterung                                     
 +
                                                                             
 +
:    Use of AES-GCM ciphers only.                                                 
 +
:    Use of Encrypt-then-MAC according RFC 7366 cannot be checked.               
 +
                                                                             
 +
:*  3.4.6 Die Heartbeat-Erweiterung                                             
 +
                                                                             
 +
:    Target must not support the heartbeat extension.                             
 +
                                                                             
 +
:*  3.4.7 Die Extended Master Secret Extension                                   
 +
                                                                             
 +
:    Use of Extended Master Secret Extension according RFC 7627 cannot           
 +
:    be checked.                                                                 
 +
                                                                             
 +
:*  3.5 Authentisierung der Kommunikationspartner                               
 +
                                                                             
 +
:    Not checked as only applicable for VPN connections.
  
:While the SSL/TLS protocol uses integer numbers to identify ciphers,
+
:* 3.6 Domainparameter und Schlüssellängen
:almost all tools use some kind of  `human readable'  texts for cipher
 
:names.
 
  
:These numbers (which are most likely written  as hex values in source
+
:   Check if signature key is > 2000 bits.
:code and documentations) are the only true identifier, and we have to
 
:rely on the tools that they use the proper integers.
 
  
:As such integer or hex numbers are difficult to handle by humans, we
+
:* 3.6.1 Verwendung von elliptischen Kurven                                     
:decided to use human readable texts. Unfortunately no common standard
+
                                                                             
:exists how to construct the names and map them to the correct number.
+
:   **NOT YET IMPLEMENTED**                                                     
:Some, but by far not all, oddities are described in [[#Name Rodeo|Name Rodeo]].
+
                                                                             
 +
:   Use only following curves according RFC 5639 and RFC 7027:                   
 +
:   brainpoolP256r1, brainpoolP384r1, brainpoolP512r1                           
 +
                                                                             
 +
:    Use of secp256r1 and secp384r1  temporary allowed.
  
:The rules for specifying cipher names are:
+
:*  4.1 Schlüsselspeicherung
  
:
+
:   This requirement is not testable from remote.
:*  1. textual names as defined by IANA (see [IANA])
 
:*  2. mapping of names and numbers as defined by IANA (see [IANA])
 
:*  3. <code>-</code>  and  <code>_</code>  are treated the same
 
:*  4. abbreviations are allowed, as long as they are unique
 
:*  5. beside IANA, openssl's cipher names are preferred
 
:*  6. name variants are supported, as long as they are unique
 
:*  7. hex numbers can be used
 
  
:[IANA]    http://www.iana.org/assignments/tls-parameters/tls-parameters.txt September 2013
+
:*  4.1 Umgang mit Ephemeralschlüsseln
  
:[openssl] ... openssl 1.0.1
+
:   This requirement is not testable from remote.
  
:If in any doubt, use ''+list''  to get an idea about the mapping.
+
:* 4.3 Zufallszahlen
:Use  ''--help=regex''  to see which regex  are used to handle all these
 
:variants herein.
 
  
:Mind the traps and dragons with cipher names and what number they are
+
:   This requirement is not testable from remote.
:actually mapped to. In particular when  ''--lib'', ''--exe'' or ''--openssl''
 
:options are in use. Always use these options with ''+list'' command too.
 
  
===== Name Rodeo=====
+
======BSI TR-03116-4 (''+tr-03116+'' ''+tr-03116-'' ''+bsi'')======
 +
:Checks if connection and ciphers are compliant according TR-03116-4,
 +
:see https://www.bsi.bund.de/SharedDocs/Downloads/DE/BSI/Publikationen
 +
:/TechnischeRichtlinien/TR03116/BSI-TR-03116-4.pdf?__blob=publicationFile
  
:As said above, the  SSL/TLS protocol uses integer numbers to identify
+
:(following headlines are taken from there)
:ciphers, but almost all tools use some kind of  human readable  texts
 
:for cipher names.
 
  
:For example the cipher commonly known as <code>DES-CBC3-SHA</code> is identified
+
:* 2.1.1 TLS-Versionen und Sessions
:by <code>0x020701c0</code> (in openssl) and has <code>SSL2_DES_192_EDE3_CBC_WITH_SHA</code>
 
:as constant name. A definition is missing in IANA, but there is
 
:<code>TLS_RSA_WITH_3DES_EDE_CBC_SHA</code> .
 
:It's the responsibility of each tool to map the human readable cipher
 
:name to the correct (hex, integer) identifier.
 
  
:For example Firefox uses  <code>dhe_dss_des_ede3_sha</code>,  which is what?
+
:Allows only TLS 1.2.
  
:Furthermore, there are different acronyms for the same thing in use.
+
:* 2.1.2 Cipher Suites
:For example  <code>DHE</code>  and  <code>EDH</code>  both mean "Ephemeral Diffie-Hellman".
 
:Comments in the ''openssl(1)'' sources mention this. And for curiosity
 
:these sources use both in cypher names but allow  <code>EDH</code> as shortcut
 
:only in openssl's "ciphers"  command. Wonder about (up to 1.0.1h):
 
    openssl ciphers -V EDH
 
    openssl ciphers -V DHE
 
    openssl ciphers -V EECDH
 
    openssl ciphers -V ECDHE
 
  
:Next example is  <code>ADH</code>  which is also known as  <code>DH_anon</code> or <code>DHAnon</code>
+
:Cipher suites must be ECDHE-ECDSA or -RSA with AES128 and SHA265.
:or  <code>DHA</code>  or <code>ANON_DH</code>.  
+
:For curiosity, stronger cipher suites with AES256 and/or SHA384 are
 +
:not not allowed. To follow this curiosity the ''+bsi-tr-03116-'' (lazy)
 +
:check allows the stronger cipher suites ;-)
  
:You think this is enough? Then have a look how many acronyms are used
+
:* 2.1.1 TLS-Versionen und Sessions
:for  "Tripple DES".
 
  
:Compared to above, the interchangeable use of  <code>-</code>  vs. <code>_</code> in human
+
:The TLS session lifetime must not exceed 2 days.
:readable cipher names is just a very simple one. However, see openssl
 
:again what following means (returns):
 
    openssl ciphers -v RC4-MD5
 
    openssl ciphers -v RC4+MD5
 
    openssl ciphers -v RC4:-MD5
 
    openssl ciphers -v RC4:!MD5
 
    openssl ciphers -v RC4!MD5
 
  
:Looking at all these oddities, it would be nice to have a common unique
+
:* 2.1.4.2 Encrypt-then-MAC-Extension
:naming scheme for cipher names. We have not. As the SSL/TLS protocol
 
:just uses a number, it would be natural to use the number as uniq key
 
:for all cipher names, at least as key in our internal sources.
 
  
:Unfortunately, the assignment of ciphers to numbers  changed over the
+
:* 2.1.4.3 OCSP-Stapling
:years, which means that the same number refers to a  different cipher
 
:depending on the standard, and/or tool, or version of a tool you use.
 
  
:As a result, we cannot use human readable cipher names as  identifier
+
:MUST have <code>OCSP Stapling URL</code>.
:(aka unique key), as there are  to many aliases  for the same cipher.
 
:And also the number  cannot be used  as unique key, as a key may have
 
:multiple ciphers assigned.
 
  
==== KNOWN PROBLEMS====
+
:* 4.1.1 Zertifizierungsstellen/Vertrauensanker
  
:This section describes knwon problems, and known error messages which
+
:Certificate must provide all root CAs. (NOT YET IMPLEMENTED).
:may occour when using ''o-saft.pl''. This sections can be used as FAQ too
 
:as it gives hints and workarounds.
 
  
===== Segmentation fault=====
+
:Should use a small certificate trust chain.
  
:Sometimes  the program terminates with a  <code>Segmentation fault</code>. This
+
:* 4.1.2 Zertifikate
:mainly happens if the target does not return certificate information.
 
:If so, the  ''--no-cert''  option may help.
 
  
===== **WARNING: empty result from openssl; ignored at ...=====
+
:Must have <code>CRLDistributionPoint</code> or <code>AuthorityInfoAccess</code>.
  
:This most likely occurs when the  provided cipher is  not accepted by
+
:End-user certificate must not be valid longer than 3 years.
:the server, or the server expects client certificates.
+
:Root-CA certificate must not be valid longer than 5 years.
  
===== **WARNING: unknown result from openssl; ignored at ...=====
+
:Certificate extension <code>pathLenConstraint</code> must exist, and should be
 +
:a small value ("small" is not defined).
  
:This most likely occurs when the openssl  executable is used with a
+
:All certificates must contain the extension <code>KeyUsage</code>.
:very slow connection. Typically the reason is a connection timeout.
 
:Try to use  ''--timeout=SEC''  option.
 
:To get more information, use  ''--v'' ''--v''  and/or  ''--trace''  also.
 
  
===== **WARNING: undefined cipher description=====
+
:Wildcards for <code>CN</code> or <code>Subject</code> or <code>SubjectAltName</code> are not allowed
 +
:in any certificate.
  
:May occour if ciphers are checked, but no description is available for
+
:EV certificates are recommended (NOT YET checked properly).
:them herein. This results in printed cipher checks like:
 
  
        EXP-KRB5-RC4-MD5                no      <undef>>
+
:* 4.1.3 Zertifikatsverifikation
  
:instead of:
+
:Must verify all certificates in the chain down to their root-CA.
 +
:(NOT YET IMPLEMENTED).
  
        EXP-KRB5-RC4-MD5                no      weak
+
:Certificate must be valid according issue and expire date.
  
===== **WARNING: Can't make a connection to your.tld:443; no initial data=====
+
:All Checks must be doen for all certificates in the chain.
===== **WARNING: Can't make a connection to your.tld:443; target ignored=====
 
  
:This message occours if the underlaying  SSL library (i.e. libssl.a)
+
:* 4.1.4 Domainparameter und Schlüssellängen
:was not able to connect to the target. Known observed reasons are:
 
:* target does not support SSL protocol on specified port
 
:* target expects a client certificate in ClientHello message
 
  
:More details why the connection failed can be seen using  ''--trace=2'' .
+
:This requirement is not testable from remote.
  
:If the targets supports SSL, it should be at least possible to check
+
:* 4 5.2 Zufallszahlen
:for supported ciphers using  ''+cipherall''  instead of  ''+cipher'' .
 
  
===== Use of uninitialized value $headers in split ... do_httpx2.al)=====
+
:This requirement is not testable from remote.
  
:The warning message (like follows or similar):
+
======RFC 2818 (''+rfc2818'')======
 +
:Check if the FQDN is listed in the certificates <code>subjectAltname</code>.
  
:Use of uninitialized value $headers in split at blib/lib/Net/SSLeay.pm
+
======RFC 6125 (''+rfc6125'')======
:(autosplit into blib/lib/auto/Net/SSLeay/do_httpx2.al) line 1290.
+
:Checks values <code>CommonName</code>, <code>Subject</code> and <code>SubjectAltname</code>  of the
 +
:certificate for:
 +
:* must all be valid characters for DNS
 +
:* must not contain more than one wildcards
 +
:* must not contain invalid wildcards
 +
:* must not contain invalid IDN characters
  
:occurs if the target refused a connection on port 80.
+
======RFC 6797 (''+rfc6797'')======
:This is considered a bug in ''Net::SSLeay''.
+
: Same as STS header ''+hsts'' .
:Workaround to get rid of this message: use ''--no-http'' option.
 
  
===== invalid SSL_version specified at ... IO/Socket/SSL.pm=====
+
======RFC 7525 (''+rfc7525'') ======
 +
:Checks if connection and ciphers are compliant according RFC 7525.
 +
:See http://tools.ietf.org/rfc/rfc7525.txt
 +
:(following headlines are taken from there)
  
:This error may occur on systems where a specific  SSL version is not
+
:* 3.1.1.  SSL/TLS Protocol Versions
:supported. Subject are mainly  SSLv2, SSLv3 TLSv1.3 and DTLSv1.
 
:For DTLSv1 the full message looks like:
 
      invalid SSL_version specified at C:/programs/perl/perl/vendor/lib/IO/Socket/SSL.
 
:See also [[#Note on SSL versions|Note on SSL versions]] .
 
  
:Workaround: use options like: ''--no-sslv2'' ''--no-sslv3'' ''--no-tlsv13'' ''--no-dtlsv1''
+
:SSLv2 and SSLv3 must not be supportetd.
 +
:TLSv1 should only be supported if there is no TLSv1.1 or TLSv1.2.
 +
:Either TLSv1.1 or TLSv1.2 must be supported, prefered is TLSv1.2.
  
===== Use of uninitialized value $_[0] in length at (eval 4) line 1.=====
+
:* 3.1.2.  DTLS Protocol Versions
  
:This warning occours with IO::Socket::SSL 1.967, reason is unknown.
+
:DTLSv1 and DTLSv1.1 must not be supported.
:It seems not to harm functionality, hence no workaround, just ignore.
 
  
===== Use of uninitialized value in subroutine entry at lib/IO/Socket/SSL.pm line 430.=====
+
:* 3.1.3.  Fallback to Lower Versions
  
:Some versions of  IO::Socket::SSL return this error message if  *-MD5
+
:(check implecitely done by 3.1.1, see above)
:ciphers are used with other protocols than SSLv2.
 
  
:Workaround: use  ''--no-md5-cipher'' option.
+
:* 3.2. Strict TLS
  
===== Can't locate auto/Net/SSLeay/CTX_v2_new.al in @INC ... =====
+
:Check if server provides Strict Transport Security.
 +
:(STARTTLS check NOT YET IMPLEMENTED).
  
:Underlaying library doesn't support the required SSL version.
+
:* 3.3Compression
:See also [[#Note on SSL versions|Note on SSL versions]] .
 
  
:Workaround: use  ''--ssl-lazy''  option, or corresponding ''--no-SSL'' option.
+
:Compression on TLS must not be supported.
  
===== Read error: Connection reset by peer (,199725) at blib/lib/Net/SSLeay.pm (autosplit into blib/lib/auto/Net/SSLeay/tcp_read_all.al) line 535. =====
+
:* 3.4. TLS Session Resumption
  
:Error reported by some Net::SSLeay versions. Reason may be a timeout.
+
:Server must support resumtion and random session tickets.
:This error cannot be omitted or handled properly.
+
:(Randomnes of session tickets implemented YET experimental.)
  
:Workaround: try to use same call again (no guarantee, unfortunatelly)
+
:Check if ticket is authenticated and encrypted NOT YET IMPLEMENTED.
  
=====openssl: ...some/path.../libssl.so.1.0.0: no version information available (required by openssl)=====
+
:* 3.5. TLS Renegotiation
  
:Mismatch of  openssl executable  and loaded underlaying library. This
+
:Server must support renegotiation.
:most likely happens when options  ''--lib=PATH''  and/or  ''--exe=PATH''  are
 
:used. See also  [[#Note on SSL versions|Note on SSL versions]] .
 
  
:Hint: use following commands to get information about used libraries:
+
:* 3.6. Server Name Indication
  o-saft.pl +version
 
  o-saft.pl --v --v +version
 
  
===== Integer overflow in hexadecimal number at ...=====
+
:(Check for SNI support implemented experimental.)
  
:This error message may occour on 32-bit systems if perl was not com-
+
:* 4. Recommendations: Cipher Suites
:piled with proper options. I.g. perl automatically converts the value
 
:to a floating pont number.
 
:Please report a bug with output of following command:
 
  o-saft.pl +s_client +dump your.tld
 
  
===== <<openssl did not return DH Paramter>>=====
+
:* 4.1.  General Guidelines
 +
:* 4.2.  Recommended Cipher Suites
  
:Text may be part of a value. This means that all checks according  DH
+
:Check for recommended ciphers.
:parameters and logkam attack cannot be done.
 
  
:Workaround: try to use  --openssl=TOOL option.
+
:* 4.3. Public Key Length
  
:This text may appears in any of the compliance checks (like +rfc7525)
+
:DH parameter must be at least 256 bits or 2048 its with EC.
:which may be a false positive.  For these checks openssl is also used
+
:(Check currently, 4/2016, based on openssl which may not provide DH
:to get the DH Parameter.
+
: parameters for all ciphers.)
  
:Workaround: not available yet
+
:* 4.5.  Truncated HMAC
  
=====No output with  +help  and/or  --help=todo =====
+
:TLS extension "truncated hmac" must not be used.
  
:On some (mainly Windows-based) systems using
+
:* 6. Security Considerations
  o-saft.pl +help
+
:* 6.1. Host Name Validation
  o-saft.pl --help
 
:does not print anything.
 
  
:Workaround: use  ''--v''  option.
+
:Given hostname must matches hostname in certificate's subject.
  o-saft.pl +help --v
 
:or
 
  o-saft.pl +help | more
 
  
===== **WARNING: on MSWin32 additional option  --v  required, sometimes ...=====
+
:* 6.2AES-GCM
 
+
:* 6.3. Forward Secrecy
:On some (mainly Windows-based) systems  this may happen when calling
+
:* 6.4. Diffie-Hellman Exponent Reuse
:for example:
+
:(NOT YET IMPLEMENTED).
  o-saft.pl --help=FAQ
 
:which then may produce:
 
  **WARNING: on MSWin32 additional option  --v  required, sometimes ...
 
  === reading: ./.o-saft.pl (RC-FILE done) ===
 
  === reading: Net/SSLinfo.pm (O-Saft module done) ===
 
  **USAGE: no command given
 
  # most common usage:
 
    o-saft.pl +info  your.tld
 
    o-saft.pl +check  your.tld
 
    o-saft.pl +cipher your.tld
 
  # for more help use:
 
    o-saft.pl --help
 
  
:Workaround: use full path to perl.exe, for example
+
:* 6.5. Certificate Revocation
  C:\Programs\perl\bin\perl.exe o-saft.pl --help=FAQ
 
  
===== Performance Problems=====
+
:OCSP and CRL Distrbution Point in cetificate must be defined.
  
:There are various reasons when the program responds slow, or seems to
+
==== OUTPUT====
:hang. Beside the problems described below performance issues are most
 
:likely a target-side problem. Most common reasons are:
 
  
* a) DNS resolver problems
+
:All output is designed to make it easily parsable by postprocessors.
:Try with  ''--no-dns''
+
:Following rules are used:
  
b) target does not accept connections for https
+
:*  Lines for formatting or header lines start with <code>=</code>.
:Try with  ''--no-http''
+
:Lines for verbosity or tracing start with <code>#</code>.
 +
:*  Errors and warnings start with <code>**</code>, hints start with <code>!!</code>.
 +
:* Empty lines are comments ;-)
 +
:*  Label texts end with a separation character; default is  <code>:</code>.
 +
:*  Label and value for all checks are separated by  at least one  TAB  character.
 +
:*  Texts for additional information are enclosed in  <code><<</code>  and  <code>>></code>.
 +
:*  <code>N/A</code> is used when no proper informations was found or provided.
  
* c) target's certificate is not valid
+
:    Replace <code>N/A</code> by whatever you think is adequate:  "No answer",
:Try with ''--no-cert''
+
:   "Not available",  "Not applicable", ...
  
* d) target expects that the client provides a client certificate
+
: Lines not described above, will have the form (be default):
:No option provided yet ...
+
        Label for information or check: TABresult
  
* e) target does not handle Server Name Indication (SNI)
+
: For more details on these lines, please refer to  [[#RESULTS|RESULTS]] above.
:Try with ''--no-sni''
 
  
*  f) use of external openssl(1) executable
+
:When used in ''--legacy=full''  or  ''--legacy=simple'' mode, the output
:Use ''--no-openssl''  
+
:may contain formatting lines for better (human) readability.
  
:Other options which may help to get closer to the problem's cause:
+
===== Errors, Warnings, Hints=====
:''--timeout=SEC'', ''--trace'',  ''--trace=cmd''
+
:Errors, warnings and hints may be part of the output as needed. While
 +
:errors and warnings are printed immediately as they occour during the
 +
:program flow, hints are printed right after the corresponding result.
  
==== LIMITATIONS====
+
:Errors and warnings start with a unique 3-digit number.
  
===== Commands=====
+
:Hints print an additional explanation of a specific result.  They are
 +
:are defined statically in the program code, or can be added on demand
 +
:by using the option  ''--cfg-hint=KEY=TEXT'' .
  
:Some commands cannot be used together with others, for example:
+
===== Postprocessing Output=====
:''+cipher'',  ''+ciphers'',  ''+list'',  ''+libversion'',  ''+version'',  ''+check'',  ''+help'',
 
:''+protocols'' .
 
  
:''+quick''  should not be used together with other commands, it returns
+
:It is recommended to use the  ''--legacy=quick''  option, if the output
:strange output then.
+
:should be postprocessed, as it omits the default separation character
 +
:(<code>:</code> , see above) and just uses on single tab character (0x09, \t  or
 +
:TAB) to separate the label text from the text of the result. Example:
 +
        Label of the performed checkTABresult
  
:''+protocols''  requires  ''openssl(1)'' with support for <code>-nextprotoneg</code>
+
:More examples for postprocessing the output can be found here:
:option. Otherwise the value will be empty.
+
:   https://github.com/OWASP/O-Saft/blob/master/contrib
  
===== Options=====
+
==== CUSTOMIZATION====
 +
:This tools can be customized as follows:
  
:The option ''--port=PORT''  must preceed  ''--host=HOST''  for a target like
+
* Using command line options
:''HOST:PORT'' .
 
  
:The characters <code>+</code> and <code>=</code> cannot be used for ''--separator'' option.
+
:   This is a simple way to redefine  specific settings.  Please  see
 +
:    [[#CONFIGURATION OPTIONS|CONFIGURATION OPTIONS]]  below.
  
:Following strings should not be used in any value for options:
+
* Using Configuration file
: <code>+check</code>, <code>+info</code>, <code>+quick</code>, <code>--header</code>
 
:as they my trigger the  -''--header''  option unintentional.
 
  
:The used ''timeout(1)'' command cannot be defined with a full path like
+
:   A configuration file can contain multiple configuration settings.
:''openssl(1)''  can with the ''--openssl=path/to/openssl''.
+
:   Syntax is simply KEY=VALUE. Please see [[#CONFIGURATION FILE|CONFIGURATION FILE]] below.
  
:''--cfg_text=file'' cannot be used to redefine the texts <code>yes</code> and <code>no</code>
+
* Using resource files
:as used in the output for  ''+cipher''  command.
 
  
===== Checks (general)=====
+
:    A resource file can contain multiple command line options. Syntax
 +
:    is the same as for command line options iteself.  Each  directory
 +
:    may contain its own resource file. Please see  [[#RC-FILE|RC-FILE]]  below.
  
====== +constraints======
+
*  Using debugging files
  
:This check is only done for the certificate provided by the target.
+
:   These files are --nomen est omen-- used for debugging purposes.
:All other certificate in the chain are not checked.
+
:   However, they can be (mis-)used to redefine all settings too.
 +
:    Please see  [[#DEBUG-FILE|DEBUG-FILE]]  below.
  
:This is currently (2015) a limitation in ''o-saft.pl''.
+
*  Using user specified code
  
===== Broken pipe=====
+
:    This file contains  user specified  program code.  It can also be
 +
:    (mis-)used to redefine all settings. Please see [[#USER-FILE|USER-FILE]]  below.
  
:This error message most likely means that the connection to specified
+
:Customization is done by redefining values in internal data structure
:target was not possible (firewall or whatever reason).
+
:which are:  %cfg,  %data,  %checks,  %text,  %scores .
  
===== Target Certificate Chain Verification=====
+
:Unless used in  [[#DEBUG-FILE|DEBUG-FILE]]  or  [[#USER-FILE|USER-FILE]],  there is  no need to know
 +
:these internal data structures or the names of variables; the options
 +
:will set the  proper values.  The key names being part of the option,
 +
:are printed in output with the  ''--trace-key''  option.
  
:The systems default capabilities i.e. libssl.so, openssl, are used to
+
:I.g. texts (values) of keys in  %data are those used in output of the
:verify the target's certificate chainUnfortunately various systems
+
:<code>Informations</code> section. Texts of keys in %checks are used for output
:have implemented different  approaches and rules how identify and how
+
:in <code>Performed Checks</code> sectionAnd texts of keys in %text are used
:to report a successful verificationAs a consequence this tool can
+
:for additional information lines or texts (mainly beginning with <code>=</code>).
:only return the same information about the chain verification as the
 
:used underlying tools.  If that information is trustworthy depends on
 
:how trustworthy the tools are.
 
  
:These limitations apply to following commands:
+
====== Configuration File vs. RC-FILE vs. DEBUG-FILE======
  
:''+verify''
+
CONFIGURATION FILE
:*  ''+selfsigned''
 
  
:Following commands and options are useful to get more information:
+
:   Configuration Files must be specified with one of the  ''--cfg_*''
 +
:    options. The specified file can be a valid path. Please note that
 +
:    only the characters:  <code>-zA-Z_0-9,.\/()-</code>  are allowed as pathname.
 +
:    Syntax in configuration file is:  <code>KEY=VALUE</code>  where <code>KEY</code> is any
 +
:    key as used in internal data structure.
 +
:   the keys in output).
  
:''+chain_verify'', ''+verify'', ''+error_verify'', ''+chain'', ''+s_client''
+
RC-FILE
:*  ''--ca-file'', ''--ca-path'', ''--ca-depth''
 
  
===== User Provided Files=====
+
:    Resource files are searched for and used automatically.
 +
:    For details see [[#RC-FILE|RC-FILE]] below.
  
:Please note that there cannot be any guarantee that the code provided
+
DEBUG-FILE
:in the  [[#DEBUG-FILE|DEBUG-FILE]] ''o-saft-usr.pm''  or  [[#USER-FILE|USER-FILE]]  ''o-saft-usr.pm''
 
:will work flawless. Obviously this is the user's responsibility.
 
  
===== Problems and Errors=====
+
:    Debug files are searched for and used automatically.
 +
:    For details see [[#DEBUG-FILE|DEBUG-FILE]] below.
  
:Checking the target for supported ciphers may return that a cipher is
+
* USER-FILE
:not supported by the server misleadingly.  Reason is most likely  an
 
:improper timeout for the connection. See  ''--timeout=SEC''  option.
 
  
:If the specified targets accepts connections but does not speak SSL,
+
:   The user program file is included only if the  ''--usr'' option was
:the connection will be closed after the system's TCP/IP-timeout. This
+
:   used. For details see  [[#USER-FILE|USER-FILE]]  below.
:script will hang (about 2-3 minutes).
 
  
:If reverse DNS lookup fails, an error message is returned as hostname,
+
===== CONFIGURATION OPTIONS=====
:like: <code><<gethostbyaddr() failed</code>>>.
+
:Configuration options are used to redefine texts and labels or score
:Workaround to get rid of this message: use  ''--no-dns''  option.
+
:settings used in output. The options are:
  
:All checks for EV are solely based on the information provided by the
+
:*  ''--cfg-cmd=CMD=LIST''
:certificate.
+
:*  ''--cfg-checks=KEY=TEXT''
 +
:*  ''--cfg-data=KEY=TEXT''
 +
:*  ''--cfg-hint=KEY=TEXT''
 +
:*  ''--cfg-text=KEY=TEXT''
 +
:*  ''--cfg-cipher=CIPHER=TEXT''
  
:Some versions of openssl (< 1.x) may not support all required options
+
:<code>KEY</code>  is the key used in the internal data structure, and  <code>TEXT</code> is the 
:which results in various error messages or --more worse-- may not be
+
:value to be set for this key. Note that unknown keys will be ignored 
:visibale at all.
+
:silently.
:Following table shows the openssl option and how to disbale it within
 
:o-saft:
 
  
:-nextprotoneg      ''--no-nextprotoneg''
+
:If  <code>KEY=TEXT</code>  is an exiting filename,  all lines from that file are
 +
:read and set. For details see  [[#CONFIGURATION FILE|CONFIGURATION FILE]]  below.
  
:-reconnect          ''--no-reconnect''
+
:<code>CIPHER</code> must be a valid cipher suite name as shown with:
  
:-tlsextdebug        ''--no-tlsextdebug''
+
    o-saft.pl ciphers
  
===== Poor Systems=====
+
:NOTE that such configuration options should be used before any ''--help''
 +
:or  ''--help=*''  option, otherwise the changed setting is not visible.
  
:Use of  ''openssl(1)'' is disabled by default on Windows due to various
+
===== CONFIGURATION FILE=====
:performance problems. It needs to be enabled with ''--openssl'' option.
 
  
:On Windows the usage of <code>openssl s_client</code> needs to be enabled using
+
:Note that the file can contain <code>KEY=TEXT</code> pairs for any kind of the
:''--s_client'' option.
+
:configuration as given by the  [[#--cfg_CFG|--cfg_CFG]]  option.
  
:On Windows it's a pain to specify the path for ''--openssl=..'' option.
+
:For example when used  with  [[#--cfg_text=FILE|--cfg_text=FILE]] only values for  %text
:Variants are:
+
:will be set, when used  with  [[#--cfg_data=FILE--cfg_data=FILE]] only values for %data
 +
:will be set, and so on.  <code>KEY</code>  is not used when  <code>KEY=TEXT</code>  is an existing
 +
:filename. Though, it's recommended to use a non-existing key, i.e.:
 +
:''--cfg-text=my_file=some/path/to/private/file'' .
  
:*  --openssl=/path/to/openssl.exe
+
===== RC-FILE=====
:*  --openssl=X:/path/to/openssl.exe
 
:*  --openssl=\path\to\openssl.exe
 
:*  --openssl=X:\path\to\openssl.exe
 
:*  --openssl=\\path\\to\\openssl.exe
 
:*  --openssl=X:\\path\\to\\openssl.exe
 
  
:You have to fiddle around to find the proper one.
+
:The rc-file will be searched for in the working directory only.
  
===== Debug and Trace Output=====
+
:The name of the rc-file is the name of the program file prefixed by a
 +
:<code>.</code>  (dot),  for example:  <code>.o-saft.pl</code>.
  
: When both ''--trace=key'' and ''--trace=cmd''  options are used, output is
+
:A rc-file can contain any of the commands and options valid for the
: mixed, obviously. Hint: output for ''--trace=cmd'' always contains "CMD".
+
:tool itself. The syntax for them is the same as on command line. Each
 +
:command or option must be in a single line. Any empty or comment line
 +
:will be ignored. Comment lines start with  <code>#</code>  or  <code>=</code>.
  
==== DEPENDENCIES====
+
:Note that options with arguments must be used as  <code>KEY=VALUE</code>  instead
 +
:of  <code>KEY VALUE</code>.
  
:All perl modules and all  private moduels and files  will be searched
+
:Configurations options must be written like <code>--cfg-CFG=KEY=VALUE</code>
:for using paths available in perl's <code>@INC</code>  variable.  <code>@INC</code> will
+
:where <code>CFG</code> is any of: <code>cmd</code>, <code>check</code>, <code>data</code>, <code>text</code>  and <code>KEY</code> is
:be prepended by following paths:
+
:any key from internal data structure (see above).
  
:*  .
+
:All commands and options given on command line will  overwrite  those
:./lib
+
:found in the rc-file.
:*  INSTALL_PATH
 
:*  INSTALL_PATH/lib
 
  
:Where  <code>INSTALL_PATH</code>  is the path where the tool is installed.
+
===== DEBUG-FILE=====
:To see which files have been included use:
 
  
    o-saft.pl +version --v --user
+
:All debugging functionality is defined in ''o-saft-dbx.pm'', which will
 +
:be searched for using paths available in  <code>@INC</code>  variable.
  
===== Perl Modules=====
+
: Syntax in this file is Perl code.  For details see  [[#DEBUG|DEBUG]]  below.
  
*  ''IO::Socket::SSL(1)''
+
===== USER-FILE=====
*  ''IO::Socket::INET(1)''
 
*  ''Net::SSLeay(1)''
 
*  ''Net::SSLinfo(1)''
 
*  ''Net::SSLhello(1)''
 
  
===== Additional Files used if requested=====
+
:All user functionality is defined in  ''o-saft-usr.pm'',  which will be
 +
:searched for using paths available in  <code>@INC</code>  variable.
 +
 
 +
: Syntax in this file is Perl code.
  
* ''.o-saft.pl''
+
:All functions defined in ''o-saft-usr.pm'' are called when the option
''o-saft-dbx.pm''
+
:''--usr''  was given. The functions are defined as empty stub, any code
* ''o-saft-man.pm''
+
:can be inserted as need.  Please see ''perldoc o-saft-usr.pm'' to see
* ''o-saft-usr.pm''
+
:when and how these functions are called.
*  ''o-saft-README''
 
  
==== INSTALLATION====
+
===== SHELL TWEAKS=====
  
:The tool can be installed in any path. It just requres the modules as
+
:Configuring the shell environment where the tool is startet,  must be
:described in  [[#DEPENDENCIES|DEPENDENCIES]]  above. However, it's recommended that the
+
:done before the tools starts. It is  not really  a task for the tool
:modules ''Net::SSLhello'' and ''Net::SSLinfo'' are found in the directory
+
:itself, but it can simplify your life, somehow.
:<code>./Net/</code>  where  <code>o-saft.pl</code>  is installed.
 
  
:For security reasons, most modern libraries disabled or even removed
+
:There exist customizations for some commonly used shells, please see
:insecure or "dirty" functionality. As this tool's purpose is to find
+
:the files in the <code>./contrib/</code> directory.
:such insecure settings, functions, etc., it needs these dirty things
 
:enabled. What we need is (incomplete list):
 
  
:* insecure protocols like SSLv2, SSLv3
+
===== COMMANDS=====
:* more more ciphers enabled, like NULL-MD5, AECDH-NULL-SHA, etc.
 
:* some SSL extensions and options
 
  
:Therefore we recommend to compile and install at least following:
+
:The option  ''--cfg-cmd=CMD=LIST''  can be used to define own commands.
 +
:When configuring own commands,  <code>CMD</code>  must not be  one of the commands
 +
:listed with  ''--help=intern''  and <code>CMD</code>  must constist only of digits and
 +
:letters.
  
:* openssl with SSLv2, SSLv3 and more ciphers enabled
+
:Examples in  ''.o-saft.pl''  are  ''+preload'' and  ''+ciphercheck'' .
:* Net::SSLeay compiled with openssl version as described before.
 
  
:Please read the  [[#SECURITY|SECURITY]]  section first before following the install
+
==== CIPHER NAMES====
:instructions below.
 
  
=====OpenSSL=====
+
:While the SSL/TLS protocol uses integer numbers to identify  ciphers,
 +
:almost all tools use some kind of  `human readable'  texts for cipher
 +
:names.
  
:Currently it is recommend to use either the openssl version from
+
:These numbers (which are most likely written  as hex values in source
:[https://github.com/PeterMosmans/openssl/ https://github.com/PeterMosmans/openssl/] which requires compilation,
+
:code and documentations) are the only true identifier, and we have to
:see  [[#Example: Compile OpenSSL|Example: Compile OpenSSL]], or use any of the precomiled versions
+
:rely on the tools that they use the proper integers.
:which are available for several platforms at [https://testssl.sh/ https://testssl.sh/] .
 
  
:The sources are available at
+
:As such integer or hex numbers are difficult to handle by humans,  we
:* [https://github.com/PeterMosmans/openssl/archive/1.0.2-chacha.zip https://github.com/PeterMosmans/openssl/archive/1.0.2-chacha.zip]
+
:decided to use human readable texts. Unfortunately no common standard
:The precomiled static versions are available at
+
:exists how to construct the names and map them to the correct number.
:* [https://github.com/drwetter/testssl.sh/tree/master/bin https://github.com/drwetter/testssl.sh/tree/master/bin]
+
:Some, but by far not all, oddities are described in [[#Name Rodeo|Name Rodeo]].
  
:For all following installation examples we assume:
+
:The rules for specifying cipher names are:
:* openssl-1.0.2-chacha.zip or openssl-1.0.2d.tar.gz
 
:* /usr/local as bae installation directory
 
:* a bourne shell (sh) compatible shell
 
  
=====Example: Precompiled OpenSSL=====
+
:
 
+
:*  1. textual names as defined by IANA (see [IANA])
:Simply download the tarball or zip file for your platform, unpack it,
+
:*  2. mapping of names and numbers as defined by IANA (see [IANA])
:and install (copy) the binaries into a directory of your choice.
+
:*  3. <code>-</code>  and  <code>_</code>  are treated the same
 +
:*  4. abbreviations are allowed, as long as they are unique
 +
:*  5. beside IANA, openssl's cipher names are preferred
 +
:*  6. name variants are supported, as long as they are unique
 +
:*  7. hex numbers can be used
  
=====Example: Compile OpenSSL=====
+
:[IANA]    http://www.iana.org/assignments/tls-parameters/tls-parameters.txt September 2013
  
:OpenSSL can be used from [http://openssl.org/ http://openssl.org/] or, as recommended, from
+
:[openssl] ... openssl 1.0.1
:[https://github.com/PeterMosmans/openssl/ https://github.com/PeterMosmans/openssl/] .
 
  
:'''OpenSSL-chacha'''
+
:If in any doubt, use  ''+list'' to get an idea about the mapping.
:Compiling and installing the later is as simple as:
+
:Use  ''--help=regex''  to see which regex  are used to handle all these
    unzip openssl-1.0.2-chacha.zip
+
:variants herein.
    cd openssl-1.0.2-chacha
 
    ./config --shared -Wl,-rpath=/usr/local/lib
 
    make
 
    make test
 
    make install
 
  
:which will install openssl, libssl.so, libcrypto.so  and some include
+
:Mind the traps and dragons with cipher names and what number they are
:files as well as the include files in /usr/local/ .
+
:actually mapped to. In particular when ''--lib'', ''--exe'' or ''--openssl''
:The shared version of the libraries are necessary for  Net::SSLeay.
+
:options are in use. Always use these options with ''+list'' command too.
  
:'''OpenSSL.org'''
+
===== Name Rodeo=====
:Building openssl from the offical  openssl.org  sources requires some
 
:patching before compiling and installing the libraries and binaries.
 
  
:Example with openssl-1.0.2d:
+
:As said above, the  SSL/TLS protocol uses integer numbers to identify
 +
:ciphers, but almost all tools use some kind of  human readable  texts
 +
:for cipher names.  
  
  echo == unpack tarball
+
:For example the cipher commonly known as <code>DES-CBC3-SHA</code> is identified
  tar xf openssl-1.0.2d.tar.gz
+
:by <code>0x020701c0</code> (in openssl) and has <code>SSL2_DES_192_EDE3_CBC_WITH_SHA</code>
  cd openssl-1.0.2d
+
:as constant name. A definition is missing in IANA, but there is
+
:<code>TLS_RSA_WITH_3DES_EDE_CBC_SHA</code> . Thers is also <code>0x000A</code> for the same
  echo == backup files to be modified
+
:cipher <code>DES-CBC3-SHA</code>. Both are valid, first one when used with SSLv2,
  cp ssl/s2_lib.c{,.bak}
+
:and second one when used with SSLv3.
  cp ssl/s3_lib.c{,.bak}
+
:It's the responsibility of each tool to map the human readable cipher
  cp ssl/ssl3.h{,.bak}
+
:name to the correct (hex, integer) identifier.
  cp ssl/tls1.h{,.bak}
 
  
  echo == patch files
+
:For example Firefox uses <code>dhe_dss_des_ede3_sha</code>which is what?
  vi ssl/tls1.h        +/TLS1_ALLOW_EXPERIMENTAL_CIPHERSUITES/
 
            # define TLS1_ALLOW_EXPERIMENTAL_CIPHERSUITES 1
 
  vi ssl/ssl3.h ssl/s{2,3}_lib.c  +"/# *if 0/"
 
            #==> remove all  # if 0  and corresponding #endif
 
            #    except if lines contain:
 
            #        _FZA
 
            #        /* Fortezza ciphersuite from SSL 3.0
 
            #        /* Do not set the compare functions,
 
            #        if (s->shutdown & SSL_SEND_SHUTDOWN)
 
  
  echo == configure with static libraries
+
:Furthermore, there are different acronyms for the same thing in use.
  echo omitt the zlib options if zlib-1g-dev is not installed
+
:For example  <code>DHE</code>  and  <code>EDH</code>  both mean "Ephemeral Diffie-Hellman".
  echo omitt the krb5 options if no kerberos libraries available
+
:Comments in the ''openssl(1)'' sources mention this. And for curiosity
  ./config --prefix=/usr/local --openssldir=/usr/local/ssl \
+
:these sources use both in cypher names but allow <code>EDH</code> as shortcut
      enable-zlib zlib zlib-dynamic enable-ssl2 \
+
:only in openssl's "ciphers" command. Wonder about (up to 1.0.1h):
      enable-krb5 --with-krb5-flavor=MIT \
+
    openssl ciphers -V EDH
      enable-mdc2 enable-md2 enable-rc5  enable-rc2 \
+
    openssl ciphers -V DHE
      enable-cms enable-ec  enable-ec2m enable-ecdh enable-ecdsa \
+
    openssl ciphers -V EECDH
      enable-gost enable-seed enable-idea enable-camellia \
+
    openssl ciphers -V ECDHE
      enable-rfc3779 enable-ec_nistp_64_gcc_128 \
 
      experimental-jpake -fPIC \
 
      -DTEMP_GOST_TLS -DTLS1_ALLOW_EXPERIMENTAL_CIPHERSUITES \
 
      shared
 
  
  echo == make binaries and libraries
+
:Next example is  <code>ADH</code>  which is also known as  <code>DH_anon</code> or <code>DHAnon</code>
  make depend
+
:or  <code>DHA</code>  or  <code>ANON_DH</code>.
  make
 
  make test
 
  make install
 
  
  echo == if you want static binaries and libraries
+
:You think this is enough? Then have a look how many acronyms are used
  make clean
+
:for  "Tripple DES".
  echo same ./config as before but without shared option
 
  ./config --prefix=/usr/local --openssldir=/usr/local/ssl \
 
      enable-zlib zlib zlib-dynamic enable-ssl2 \
 
      enable-krb5 --with-krb5-flavor=MIT \
 
      enable-mdc2 enable-md2 enable-rc5 enable-rc2 \
 
      enable-cms  enable-ec  enable-ec2m enable-ecdh enable-ecdsa \
 
      enable-gost enable-seed enable-idea enable-camellia \
 
      enable-rfc3779 enable-ec_nistp_64_gcc_128 \
 
      experimental-jpake -fPIC \
 
      -DTEMP_GOST_TLS -DTLS1_ALLOW_EXPERIMENTAL_CIPHERSUITES
 
  make depend
 
  make
 
  make test
 
  echo next make will overwrite the previously installed dynamic
 
  echo shared openssl binary with the static openssl binary
 
  make install
 
  
=====Example: Compile Net::SSLeay=====
+
:Compared to above, the interchangeable use of  <code>-</code>  vs.  <code>_</code> in human
 +
:readable cipher names is just a very simple one. However, see openssl
 +
:again what following means (returns):
 +
    openssl ciphers -v RC4-MD5
 +
    openssl ciphers -v RC4+MD5
 +
    openssl ciphers -v RC4:-MD5
 +
    openssl ciphers -v RC4:!MD5
 +
    openssl ciphers -v RC4!MD5
  
:To enable support for ancient protocol versions, ''Net::SSLeay'' must be
+
:Looking at all these oddities, it would be nice to have a common unique
:compiled manually after patching 'SSLeay.xs' (see below).
+
:naming scheme for cipher names. We have notAs the SSL/TLS protocol
:Reason is, that  ''Net::SSLeay''  enables some functionality for SSL/TLS
+
:just uses a number, it would be natural to use the number as uniq key
:according the identified openssl version. There is, currently (2015),
+
:for all cipher names, at least as key in our internal sources.
:no possibility to enable this functionality  by passing options on to
 
:the configuration script <code>perl Makefile.PL</code>.
 
  
    echo == unpack tarball
+
:Unfortunately, the assignment of ciphers to numbers  changed over the
    tar xf Net-SSLeay-1.72.tar.gz
+
:years, which means that the same number refers to a  different cipher
    cd Net-SSLeay-1.72
+
:depending on the standard, and/or tool, or version of a tool you use.
  
    echo == patch files
+
:As a result, we cannot use human readable cipher names as  identifier
    echo "edit SSLeay.xs and change some #if as described below"
+
:(aka unique key), as there are  to many aliases  for the same cipher.
    env OPENSSL_PREFIX=/usr/local perl Makefile.PL PREFIX=/usr/local \
+
:And also the number cannot be used  as unique key, as a key may have
          INC=/usr/local/include DEFINE=-DOPENSSL_BUILD_UNSAFE=1
+
:multiple ciphers assigned.
    make
 
    make install
 
    cd /tmp && o-saft.pl +version
 
  
:SSLeay.xs needs to be changed as follows:
+
==== KNOWN PROBLEMS====
* search for
 
    #ifndef OPENSSL_NO_SSL2
 
    #if OPENSSL_VERSION_NUMBER < 0x10000000L
 
 
 
    const SSL_METHOD *
 
    SSLv2_method()
 
 
 
    #endif
 
    #endif
 
 
 
    #ifndef OPENSSL_NO_SSL3
 
    #if OPENSSL_VERSION_NUMBER < 0x10002000L
 
 
    const SSL_METHOD *
 
    SSLv3_method()
 
 
    #endif
 
    #endif
 
* and replace by
 
    const SSL_METHOD *
 
    SSLv2_method()
 
 
    const SSL_METHOD *
 
    SSLv3_method()
 
  
:Note that  ''Net::SSLeay'' will be installed in <code>/usr/local/</code> then. This
+
:This section describes knwon problems, and known error messages which
:can be adapted to your needs by passing another path to the  <code> PREFIX</code>
+
:may occour when using ''o-saft.pl''. This sections can be used as FAQ too
:and <code> DESTDIR</code>  parameter.
+
:as it gives hints and workarounds.
  
=====Testing OpenSSL=====
+
===== Segmentation fault=====
  
:After installation as descibed above finished, openssl may be tested:
+
:Sometimes  the program terminates with a  <code>Segmentation fault</code>.  This
 +
:mainly happens if the target does not return certificate information.
 +
:If so, the  ''--no-cert''  option may help.
  
    echo already installed openssl (found with PATH environment)
+
===== **WARNING: empty result from openssl; ignored at ...=====
    openssl ciphers -v
 
    openssl ciphers -V -ssl2
 
    openssl ciphers -V -ssl3
 
    openssl ciphers -V ALL
 
    openssl ciphers -V ALL:COMPLEMENTOFALL
 
    openssl ciphers -V ALL:eNULL:EXP
 
  
    echo own compiled and installed openssl
+
:This most likely occurs when the  provided cipher is  not accepted by
    /usr/local/openssl ciphers -v
+
:the server, or the server expects client certificates.
    /usr/local/openssl ciphers -V -ssl2
 
    /usr/local/openssl ciphers -V -ssl3
 
    /usr/local/openssl ciphers -V ALL
 
    /usr/local/openssl ciphers -V ALL:COMPLEMENTOFALL
 
    /usr/local/openssl ciphers -V ALL:eNULL:EXP
 
  
The difference should be obvious.
+
===== **WARNING: unknown result from openssl; ignored at ...=====
Note, the commands using  "ALL:COMPLEMENTOFALL"  and  "ALL:eNULL:EXP"
 
should return the same result.
 
  
=====Testing Net::SSLeay=====
+
:This most likely occurs when the  openssl  executable is used with a
 +
:very slow connection. Typically the reason is a connection timeout.
 +
:Try to use  ''--timeout=SEC''  option.
 +
:To get more information, use  ''--v'' ''--v''  and/or  ''--trace''  also.
  
:As we want to test the separately installed  ''Net::SSLeay'',  it is best
+
===== **WARNING: undefined cipher description=====
:to do it with  <code>o-saft.pl</code>  itself:
 
  
    o-saft.pl +version
+
:May occour if ciphers are checked, but no description is available for
 +
:them herein. This results in printed cipher checks like:
  
:we should see a line similar to follwong at the end of the output:
+
        EXP-KRB5-RC4-MD5                no      <undef>>
  
    Net::SSLeay  1.72  /usr/local/lib/x86_64-linux-gnu/perl/5.20.2/Net/SSLeay.pm
+
:instead of:
  
:Now check for supported (known) ciphers:
+
        EXP-KRB5-RC4-MD5                no      weak
  
    o-saft.pl ciphers -V
+
===== **WARNING: Can't make a connection to your.tld:443; no initial data=====
 +
===== **WARNING: Can't make a connection to your.tld:443; target ignored=====
  
:we should see lines similar to those of the last <code>/usr/local/openssl</code>
+
:This message occours if the underlaying SSL library (i.e. libssl.a)
:call. However, it should contain more cipher lines.
+
:was not able to connect to the target. Known observed reasons are:
 +
:* target does not support SSL protocol on specified port
 +
:* target expects a client certificate in ClientHello message
  
=====Stand-alone Executable=====
+
:More details why the connection failed can be seen using  ''--trace=2'' .
  
:Some people asked for a stand-alone executable (mainly for Windows).
+
:If the targets supports SSL, it should be at least possible to check
:Even perl is a scripting language there are situations where a stand-
+
:for supported ciphers using  ''+cipherall''  instead of  ''+cipher'' .
:alone executable would be nice, for example if the installed perl and
 
:its libraries are outdated, or if perl is missing at all.
 
  
:Currently (2016) there a at least following possibilities to generate
+
===== Use of uninitialized value $headers in split ... do_httpx2.al)=====
:a stand-alone executable:
 
  
* perl with PAR::Packer module
+
:The warning message (like follows or similar):
      pp -C -c o-saft.pl
 
      pp -C -c o-saft.pl -M Net::DNS -M Net::SSLeay -M IO::Socket \
 
                        -M Net::SSLinfo -M Net::SSLhello
 
      pp -C -c checkAllCiphers.pl
 
      pp -C -c checkAllCiphers.pl -M Net::DNS
 
  
* ActiveState perl with its perlapp
+
:Use of uninitialized value $headers in split at blib/lib/Net/SSLeay.pm
      perlapp --clean o-saft.pl
+
:(autosplit into blib/lib/auto/Net/SSLeay/do_httpx2.al) line 1290.
      perlapp --clean o-saft.pl -M Net::DNS -M Net::SSLeay -M IO::Socket \
 
                  -M Net::SSLinfo -M Net::SSLhello
 
      perlapp --clean checkAllCiphers.pl
 
      perlapp --clean checkAllCiphers.pl -M Net::DNS
 
  
* perl2exe from IndigoSTar
+
:occurs if the target refused a connection on port 80.
      perl2exe o-saft.pl
+
:This is considered a bug in ''Net::SSLeay''.
      perl2exe checkAllCiphers.pl
+
:Workaround to get rid of this message: use  ''--no-http''  option.
  
:For details  on building the executable,  for example how to include
+
===== invalid SSL_version specified at ... IO/Socket/SSL.pm=====
:all required modules, please refer to the documentation of the tool.
 
:* http://search.cpan.org/~rschupp/PAR-Packer-1.030/lib/PAR/Packer.pm
 
:* http://docs.activestate.com/pdk/6.0/PerlApp.html
 
:* http://www.indigostar.com
 
  
:Note that pre-build executables (build by perlapp, perl2exe) cannot
+
:This error may occur on systems where a specific SSL version is not
:be provided due to licence problems.
+
:supported. Subject are mainly  SSLv2, SSLv3 TLSv1.3 and DTLSv1.
:Also note that using stand-alone executable have not been tested the
+
:For DTLSv1 the full message looks like:
:same way as the <code>o-saft.pl</code> itself. Use them at your own risk.
+
      invalid SSL_version specified at C:/programs/perl/perl/vendor/lib/IO/Socket/SSL.
 +
:See also  [[#Note on SSL versions|Note on SSL versions]] .
  
==== SEE ALSO====
+
:Workaround: use options like: ''--no-sslv2'' ''--no-sslv3'' ''--no-tlsv13'' ''--no-dtlsv1''
  
* ''openssl(1)'', ''Net::SSLeay(1)'', ''Net::SSLhello'', ''Net::SSLinfo'', ''timeout(1)''
+
===== Use of uninitialized value $_[0] in length at (eval 4) line 1.=====
* http://www.openssl.org/docs/apps/ciphers.html
 
* ''IO::Socket::SSL(1)'', ''IO::Socket::INET(1)''
 
  
==== HACKER's INFO====
+
:This warning occours with IO::Socket::SSL 1.967, reason is unknown.
 +
:It seems not to harm functionality, hence no workaround, just ignore.
  
=====Note on SSL versions=====
+
===== Use of uninitialized value in subroutine entry at lib/IO/Socket/SSL.pm line 430.=====
  
:Automatically detecting the supported SSL versions of the underlaying
+
:Some versions of IO::Socket::SSL return this error message if  *-MD5
:system is a hard job and not always possible. Reasons could be:
+
:ciphers are used with other protocols than SSLv2.
  
* used perl modules (''Socket::SSL'', ''Net::SSLeay'') does not handle errors
+
:Workaround: use  ''--no-md5-cipher'' option.
:properly. Erros may be:
 
  invalid SSL_version specified at ... IO/Socket/SSL.pm
 
  
  Use of uninitialized value in subroutine entry at lib/IO/Socket/SSL.pm
+
===== Can't locate auto/Net/SSLeay/CTX_v2_new.al in @INC ... =====
  
* the underlaying libssl does not support the version, which then may
+
:Underlaying library doesn't support the required SSL version.
:result in segmentation fault
+
:See also  [[#Note on SSL versions|Note on SSL versions]] .
  
* the underlaying libssl is newer than the perl module and the module
+
:Workaround: use  ''--ssl-lazy'' option, or corresponding ''--no-SSL'' option.
:has not been reinstalled. This most often happens with ''Net::SSLeay''
+
 
:This can be detected with (see version numbers for  ''Net::SSLeay''):
+
===== Read error: Connection reset by peer (,199725) at blib/lib/Net/SSLeay.pm (autosplit into blib/lib/auto/Net/SSLeay/tcp_read_all.al) line 535. =====
    o-saft.pl +version
 
  
* perl (in particular a used module, see above)  may bail out with a
+
:Error reported by some Net::SSLeay versions. Reason may be a timeout.
:compile error, like
+
:This error cannot be omitted or handled properly.
    Can't locate auto/Net/SSLeay/CTX_v2_new.al in @INC ...
 
  
:We try to detect unsupported versions and disable them automatically,
+
:Workaround: try to use same call again (no guarantee, unfortunatelly)
:a warning like follwoing is shown then:
 
    **WARNING: SSL version <code>SSLv2</code> not supported by openssl
 
  
:If problems occour with  SSL versions, following commands and options
+
===== Odd number of elements in anonymous hash at Net/SSLinfo.pm line 1613. =====
:may help to to get closer to the reason or can be used as workaround:
 
    o-saft.pl +version
 
    o-saft.pl +version | grep versions
 
    o-saft.pl +version | grep 0x
 
    o-saft.pl +protocols your.tld
 
    o-saft.pl +protocols your.tld --no-rc
 
  
:If problems occour with SSL versions, following commands and options
+
:This warning from perl have been observed when the connection to the
:Checking for SSL version is done at one place in the code, search for
+
:target to check for supported ciphers cannot be established.
    supported SSL versions
 
  
===== Using private libssl.so and libcrypt.so=====
+
:This message can be ignored.
  
:For all  cryptographic functionality  the libraries  installed on the
+
=====openssl: ...some/path.../libssl.so.1.0.0: no version information available (required by openssl)=====
:system will be used. This is in particular perl's  ''Net:SSLeay'' module,
 
:the system's  ''libssl.so'' and ''libcrypt.so''  and the ''openssl'' executable.
 
  
:It is possible to provide your own libraries, if the perl module and
+
:Mismatch of openssl executable  and loaded underlaying library. This
:the executable are linked using  dynamic shared objects  (aka shared
+
:most likely happens when options ''--lib=PATH''  and/or  ''--exe=PATH''  are
:library, position independent code).
+
:used. See also  [[#Note on SSL versions|Note on SSL versions]] .
:The appropriate option is ''--lib=PATH''  .
 
  
:On most systems these libraries are loaded at startup of the program.
+
:Hint: use following commands to get information about used libraries:
:The runtime loader uses a preconfigured list of directories  where to
+
  o-saft.pl +version
:find these libraries. Also most systems provide a special environment
+
  o-saft.pl --v --v +version
:variable to specify  additional paths  to directories where to search
 
:for libraries, for example the  <code>LD_LIBRARY_</code> variable.
 
:This is the default environment variable used herein. If your system
 
:uses  another name it must be specified with the  ''--envlibvar=NAME''
 
:option, where  <code>NAME</code>  is the name of the environment variable.
 
  
===== Understanding  ''--exe=PATH'', ''--lib=PATH'', ''--openssl=FILE''=====
+
===== Integer overflow in hexadecimal number at ...=====
  
:If any of ''--exe=PATH'' or ''--lib=PATH'' is provided, the pragram calls
+
:This error message may occour on  32-bit systems if perl was not com-
:(<code>exec</code>) itself recursively with all given options, except the option
+
:piled with proper options. I.g. perl automatically converts the value
:itself. The environment variables  <code>LD_LIBRARY_PATH</code>  and <code>PATH</code>  are
+
:to a floating pont number.
:set before executing as follows:
+
:Please report a bug with output of following command:
 +
  o-saft.pl +s_client +dump your.tld
  
:*  prepend  <code>PATH</code> with all values given with  ''--exe=PATH''
+
===== <<openssl did not return DH Paramter>>=====
:*  prepend  <code>LD_LIBRARY_PATH</code>  with all values given with  ''--lib=PATH''
 
  
:This is exactly, what ''Cumbersome Approach'' below describes. So these
+
:Text may be part of a value. This means that all checks according  DH
:option simply provide a shortcut for that.
+
:parameters and logkam attack cannot be done.
  
:Note that ''--openssl=FILE'' is a full path to the ''openssl'' executable
+
:Workaround: try to use  --openssl=TOOL option.
:and will not be changed.  However, if it is a relative path, it might
 
:be searched for using the previously set  <code>PATH</code> (see above).
 
  
:Note that  <code>LD_LIBRARY_PATH</code>  is the defaultIt can be changed with
+
:This text may appears in any of the compliance checks (like +rfc7525)
:the ''--envlibvar=NAME''  option.
+
:which may be a false positiveFor these checks openssl is also used
 +
:to get the DH Parameter.
  
:While  ''--exe''  mainly impacts the openssl executable,  ''--lib''  also
+
:Workaround: not available yet
:impacts o-saft.pl itself, as it loads other shared libraries if found.
 
  
:Bear in mind that all these options can affect the behaviour of the
+
=====No output with +help and/or --help=todo =====
:openssl subsystem,  influencing both which  executable is called and
 
:which shared libraries will be used.
 
  
:NOTE that no checks are done if the options are set proper. To verify
+
:On some (mainly Windows-based) systems using
:the settings, following commands may be used:
+
  o-saft.pl +help
    o-saft.pl --lib=YOU-PATH --exe=YOUE-EXE +version
+
  o-saft.pl --help
    o-saft.pl --lib=YOU-PATH --exe=YOUE-EXE --v +version
+
:does not print anything.
    o-saft.pl --lib=YOU-PATH --exe=YOUE-EXE --v --v +version
 
  
 +
:Workaround: use  ''--v''  option.
 +
  o-saft.pl +help --v
 +
:or
 +
  o-saft.pl +help | more
  
:Why so many options?  Exactly as described above, these options allow
+
=====Character set (like UTF-8) not recognized in some tools=====
:the users to tune the behaviour of the tool to their needs.  A common
 
:use case is to enable the use of a separate openssl build independent
 
:of the openssl package used by the operating system.  This allows the
 
:user fine grained control over openssl's encryption suites  which are
 
:compiled/available, without affecting the core system.
 
  
===== Caveats=====
+
:Some tools do not diplay all characters properly,  i.e. some versions
 +
:of podviewer. It is not the obligation of this tool to fix well known
 +
:bugs in other tools. However, we can offer workarounds.
  
:Depending on your system and the used modules and executables, it can
+
:Workaround: generate the affected output using ''--std-format=*'' options   
:be tricky to replace the configured shared libraries with own ones.
+
:For example:                                                                
:Reasons are:
+
    o-saft.pl --no-rc --std-format=raw --help=gen-pod
: a) the linked library name contains a version number,
 
: b) the linked library uses a fixed path,
 
: c) the linked library is searched at a predefined path,
 
:  d) the executable checks the library version when loaded.
 
  
:Only the first one a) can be circumvented. The last one d) can often
+
===== **WARNING: on MSWin32 additional option  --v  required, sometimes ...=====
:be ignored as it only prints a warning or error message.
 
  
:To circumvent the "name with version number" problem try following:
+
:On some (mainly Windows-based) systems  this may happen  when calling
 
+
:for example:
1. use ''ldd'' (or a similar tool) to get the names used by ''openssl'':
+
  o-saft.pl --help=FAQ
 
+
:which then may produce:
ldd /usr/bin/openssl
+
  **WARNING: on MSWin32 additional option  --v required, sometimes ...
 +
  === reading: ./.o-saft.pl (RC-FILE done) ===
 +
  === reading: Net/SSLinfo.pm (O-Saft module done) ===
 +
  **USAGE: no command given
 +
  # most common usage:  
 +
    o-saft.pl +info  your.tld
 +
    o-saft.pl +check your.tld
 +
    o-saft.pl +cipher your.tld
 +
  # for more help use:
 +
    o-saft.pl --help
  
:which returns something like:
+
:Workaround: use full path to perl.exe, for example
 +
  C:\Programs\perl\bin\perl.exe o-saft.pl --help=FAQ
  
:  libssl.so.0.9.8 => /lib/libssl.so.0.9.8 (0x00007f940cb6d000)
+
===== Performance Problems=====
:  libcrypto.so.0.9.8 => /lib/libcrypto.so.0.9.8 (0x00007f940c7de000)
 
:  libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f940c5d9000)
 
:  libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f940c3c1000)
 
:  libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f940c02c000)
 
:  /lib64/ld-linux-x86-64.so.2 (0x00007f940cdea000)
 
  
:Here only the first two libraries are importantBoth,  libcrypto.so
+
:There are various reasons when the program responds slow, or seems to
:and libssl.so  need to be version "0.9.8" (in this example).
+
:hang. Performance issues are most likely a target-side problemMost
 +
:common reasons are (no specific order):
  
2. create a directory for your libraries, i.e.:
+
:*  a) DNS resolver problems
 +
::Try with  ''--no-dns''
  
mkdir /tmp/dada
+
:* b) target does not accept connections for https
 +
::Try with  ''--no-http''
  
3. place your libraries there, assuming they are:
+
:c) target's certificate is not valid
 +
::Try with  ''--no-cert''
  
/tmp/dada/libssl.so.1.42
+
:* d) target expects that the client provides a client certificate
: /tmp/dada/libcrypto.so.1.42
+
::No option provided yet ...
  
4. create symbolic links in that directory:
+
:e) target does not handle Server Name Indication (SNI)
 +
::Try with  ''--no-sni''
  
ln -s libssl.so.1.42    libssl.so.0.9.8
+
:* f) use of external openssl(1) executable
ln -s libcrypto.so.1.42 libcrypto.so.0.9.8
+
::Use ''--no-openssl''
  
5. test program with following option:
+
:g) target does not respond at all and/or blocks
 +
::Use  ''--ssl-error''
 +
::For a detailed description, please see [[#Connection Problems|Connection Problems]].
  
    o-saft.pl +libversion --lib=/tmp/dada
+
:Other options which may help to get closer to the problem's cause:
    o-saft.pl +list ----lib=/tmp/dada
+
:''--trace-time'',  ''--timeout=SEC'',  ''--trace'',  ''--trace-cmd''
  
or:
+
:Using ''--trace=time''  should show following times:                  
 +
:* DNS:            1 - 10 sec
 +
:* no SNI:          1 - 10 sec 
 +
:* connection test: 1 -  5 sec
 +
:* need_default:    <5 sec
 +
:* need_cipher:    1 - 60 sec (+cipher with socket) 
 +
:* need_cipher:    1 - 20 sec (+cipherraw) 
 +
:* prepare checks:  2 - 20 sec               
 +
:* info:            <1 sec     
 +
:* check:          <1 sec
  
    o-saft.pl +libversion --lib=/tmp/dada -exe=/path/to-openssl
+
==== LIMITATIONS====
    o-saft.pl +list --v  --lib=/tmp/dada -exe=/path/to-openssl
 
  
*  6. start program with your options, i.e.:
+
===== Commands=====
  
    o-saft.pl --lib=/tmp/dada +ciphers
+
:Some commands cannot be used together with others, for example:
 +
:''+cipher'',  ''+ciphers'',  ''+list'',  ''+libversion'',  ''+version'',  ''+check'',  ''+help'',
 +
:''+protocols'' .
  
:This works if ''openssl(1)'' uses the same shared libraries as
+
:''+quick'' should not be used together with other commands, it returns
:''Net:SSLeay(1)'', which most likely is the case.
+
:strange output then.
  
:It's tested with Unix/Linux only. It may work on other platforms also
+
:''+protocols''  requires  ''openssl(1)'' with support for <code>-nextprotoneg</code>
:if they support such an environment variable and the installed
+
:option. Otherwise the value will be empty.
:''Net::SSLeay(1)''  and ''openssl(1)'' are linked using dynamic shared
 
:objects.
 
  
:Depending on  compile time settings  and/or  the location of the used
+
===== Options=====
:tool or lib, a warning like following may occur:
 
  
  WARNING: can't open config file: /path/to/openssl/ssl/openssl.cnf
+
:The option  ''--port=PORT''  must preceed  ''--host=HOST''  for a target like
 +
:''HOST:PORT'' .
  
:This warning can be ignored, usually as  ''req''  or  ''ca''  sub commands of
+
:The characters <code>+</code> and <code>=</code> cannot be used for [[#--separator=CHAR|--separator==CHAR]] option.
:openssl is not used here.
 
:To fix the problem, either use  ''--openssl-cnf=FILE''  option or set the
 
:the environment variable OPENSSL_CONF properly.
 
  
====== Cumbersome Approach======
+
:Following strings should not be used in any value for options:
 +
:  <code>+check</code>, <code>+info</code>, <code>+quick</code>, <code>--header</code>
 +
:as they my trigger the  -''--header''  option unintentional.
  
:A more cumbersome approach to call this program is to set  following
+
:The used ''timeout(1)'' command cannot be defined with a full path like
:environment variables in your shell:
+
:''openssl(1)''  can with the ''--openssl=path/to/openssl''.
  
  PATH=/tmp/dada-1.42/apps:$PATH
+
:[[#--cfg_text=FILE|--cfg_text=FILE]]  cannot be used to redefine the texts <code>yes</code> and <code>no</code>
  LD_LIBRARY_PATH=/tmp/dada-1.42
+
:as used in the output for  ''+cipher''  command.
  
====== Windows Caveats======
+
===== Checks (general)=====
  
:I.g. the used libraries on Windows are ''libeay32.dll'' and ''ssleay32.dll''.
+
====== +constraints======
  
:Windows also supports the <code>LD_LIBRARY_PATH</code> environment variable. If it
+
:This check is only done for the certificate provided by the target.
:does not work as expected with that variable, it might be possible to
+
:All other certificate in the chain are not checked.
:place the libs in the same directory as the  corresponding executable
 
:(which is found by the <code>PATH</code> environment variable).
 
  
===== Using CGI mode=====
+
:This is currently (2018) a limitation in ''o-saft.pl''.
  
:This script can be used as  CGI application. Output is the same as in
+
===== Broken pipe=====
:common CLI mode, using  'Content-Type:text/plain'.  Keep in mind that
 
:the used modules like  ''Net::SSLeay''  will write some debug messages
 
:on STDERR instead STDOUT. Therefore multiple  ''--v'' and/or  ''--trace''
 
:options behave slightly different.
 
  
:No additional external files like [[#RC-FILE|RC-FILE]] or  [[#DEBUG-FILE|DEBUG-FILE]] are read
+
:This error message most likely means that the connection to specified
:in CGI mode; they are silently ignored.
+
:target was not possible (firewall or whatever reason).
:Some options are disabled in CGI mode  because they are dangerous  or
 
:don't make any sense.
 
  
====== WARNING======
+
===== Target Certificate Chain Verification=====
  
: There are  no input data validation checks implemented herein. All
+
:The systems default capabilities i.e. libssl.so, openssl, are used to
input data is url-decoded once and then used verbatim.
+
:verify the target's certificate chain. Unfortunately various systems
: More advanced checks must be done outside before calling this tool.
+
:have implemented different approaches and rules how identify and how
 +
:to report a successful verification. As a consequence  this tool can
 +
:only return the same information about the chain verification as the
 +
:used underlying tools. If that information is trustworthy depends on
 +
:how trustworthy the tools are.
  
:It's not recommended to run this tool in CGI mode.
+
:These limitations apply to following commands:
:You have been warned!
 
  
===== Using user specified code=====
+
:*  ''+verify''
 +
:*  ''+selfsigned''
  
:There are some functions called within the program flow, which can be
+
:Following commands and options are useful to get more information:
:filled with any perl code.  Empty stubs of the functions are prepared
 
:in  ''o-saft-usr.pm''.  See also  [[#USER-FILE|USER-FILE]].
 
  
==== DEBUG====
+
:*  ''+chain_verify'', ''+verify'', ''+error_verify'', ''+chain'', ''+s_client''
 +
:*  ''--ca-file'', ''--ca-path'', ''--ca-depth''
  
===== Debugging, Tracing=====
+
===== User Provided Files=====
  
:Following  options and commands  are useful for hunting problems with
+
:Please note that there cannot be any guarantee that the code provided
:SSL connections and/or this tool. Note that some options can be given
+
:in the  [[#DEBUG-FILE|DEBUG-FILE]] ''o-saft-usr.pm'' or  [[#USER-FILE|USER-FILE]] ''o-saft-usr.pm''  
:multiple times to increase amount of listed information. Also keep in
+
:will work flawless. Obviously this is the user's responsibility.
:mind that it's best to specify ''--v'' as very first argument.
 
  
:Note that the file  ''o-saft-dbx.pm''  is required, if any  ''--trace*''
+
===== Problems and Errors=====
:or  ''--v''  option is used.
 
  
====== Commands======
+
:Checking the target for supported ciphers may return that a cipher is
 +
:not supported by the server  misleadingly.  Reason is most likely  an
 +
:improper timeout for the connection. See  ''--timeout=SEC''  option.
  
* ''+dump''
+
:If the specified targets accepts connections but does not speak SSL,
*  ''+libversion''
+
:the connection will be closed after the system's TCP/IP-timeout. This
*  ''+s_client''
+
:script will hang (about 2-3 minutes).
*  ''+todo''
 
*  ''+version''
 
  
====== Options======
+
:If reverse DNS lookup fails, an error message is returned as hostname,
 +
:like:  <code><<gethostbyaddr() failed</code>>>.
 +
:Workaround to get rid of this message: use  ''--no-dns''  option.
  
*  ''--v''
+
:All checks for EV are solely based on the information provided by the
*  ''--v--''
+
:certificate.
*  ''--trace''
 
*  ''--trace-arg''
 
*  ''--trace-cmd''
 
*  ''--trace-key''
 
  
:Empty or undefined strings are written as  <code><<undefined>></code>  in texts.
+
:Some versions of openssl (< 1.x) may not support all required options
:Some parameters, in particular those of  HTTP responses, are written
+
:which results in various error messages or --more worse-- may not be
:as  <code><<response>></code>. Long parameter lists are abbreviated with <code>...</code>.
+
:visibale at all. Available functionalitity of openssl will be checked
 +
:for right at the beginning Proper Warnings and hints are printed.
 +
:Following table shows the openssl option and how to disbale it within
 +
:o-saft:
  
====== Output======
+
:* -nextprotoneg      ''--no-nextprotoneg''
 +
:* -reconnect          ''--no-reconnect''
 +
:* -tlsextdebug        ''--no-tlsextdebug''
 +
:* -alpn              ''--no-alpn''
  
:When using  ''--v''  and/or  ''--trace''  options, additional output will
+
===== Connection Problems=====
:be prefixed with a  <code>#</code>  (mainly as first, left-most character.
 
:Following formats are used:
 
  
:* #<space>
+
:Sometimes the connection cannot be established. This may have various
 +
:reasons. Unfortunaly this script seems to hang then.  In  particular
 +
:when checking for ciphers with  ''+cipher''  or  ''+cipherall'' . The reason
 +
:is most likely that the server does not respond to the TCP/IP request
 +
:and hence the script closes the connection after the configured time-
 +
:out (see  ''--timeout=SEC''  option).
  
:   Addition text for verbosity (''--v'' options).
+
:Continous connection attempts  can be inhibited with the  ''--ssl-error''
 +
:option, which is set by default. Avoiding further connections results
 +
:in a loss of information and consequentely leading to wrong checks.
  
:* #[variable name]<TAB>
+
:It is a trade-off to wait for all information done accurately,  or to
 +
:get the results quickly. The logic to stop connecting for ''--ssl-error''
 +
:can be controlled with following additional options:
 +
:* --ssl-error-max=CNT    - max. continous errors
 +
:* --ssl-error-timeout=SEC - timeout when to treat a failure as error
 +
:* --ssl-error-total=CNT  - max. amount of errors
  
:   Internal variable name (''--trace-key'' options).
+
:This means that no more connections are made when more than
 +
:* --ssl-error-max errors occour sequentialy
 +
:or
 +
:* --ssl-error-total errors occoured
  
:* #o-saft.pl::
+
:Examples:
:* #Net::SSLinfo::
+
:* <code>--ssl-error-max=3</code>
 +
:* <code>--ssl-error-timeout=6</code>
 +
:* <code>--ssl-error-total=6</code>
 +
:no more connections are made if for example any sequence of timeouts
 +
:occour:
 +
  0 5 2 2                  - --ssl-error-max matches
 +
  0 1 3 0 0 0 4 1 2 2 2    - --ssl-error-max matches
 +
  0 5 0 2 0 2 2 0 2 0 2    - --ssl-error-total matches
  
:   Trace information for ''--trace''  options.
+
:This allows to fine-tune the condition when to stop connecting to the
 +
:target. For example, continous but not consecutive timeouts may indi-
 +
:cate a bad or instable network connection, but not that the target to
 +
:be connected blocks. In such a case sequence of timeouts like follows
 +
:may be observed (assuming <code>--ssl-error-max=3</code>):
 +
  0 5 1 2 2 2 4 2 3 2 3 3 3 2
 +
        ^                ^____ stop for --ssl-error-timeout=3
 +
        |______________________ stop for --ssl-error-timeout=2
  
:* #{
+
:On normal (even slow) network connections  dozens of  connections per
 +
:second are usual, hence the timeout is always  0 or 1.  Based on that
 +
:experience  ''--ssl-error''  is enabled and set with defaults as follows:
 +
:* <code>--ssl-error-max=5</code>
 +
:* <code>--ssl-error-timeout=1</code>
 +
:* <code>--ssl-error-total=10</code>
  
:    Trace information from  <code>NET::SSLinfo</code>  for  ''--trace''  options.
+
===== Poor Systems=====
:    These are data lines in the format:  #{ variable name : value #}
 
:    Note that  <code>value</code>  here can span multiple lines and ends with #}
 
  
==== EXAMPLES====
+
:Use of  ''openssl(1)'' is disabled by default on Windows due to various
 +
:performance problems. It needs to be enabled with ''--openssl'' option.
  
:($0 in all following examples is the name of the tool)
+
:On Windows the usage of <code>openssl s_client</code> needs to be enabled using
 +
:[[#--s_client|--s_client]] option.
  
===== General=====
+
:On Windows it's a pain to specify the path for [[#--openssl=TOO|--openssl=TOOL]] option.
 +
:Variants are:
  
    o-saft.pl +cipher some.tld
+
:*  --openssl=/path/to/openssl.exe
    o-saft.pl +info  some.tld
+
:*  --openssl=X:/path/to/openssl.exe
    o-saft.pl +check some.tld
+
:*  --openssl=\path\to\openssl.exe
    o-saft.pl +quick  some.tld
+
:* --openssl=X:\path\to\openssl.exe
    o-saft.pl +help=commands
+
:*  --openssl=\\path\\to\\openssl.exe
    o-saft.pl +list
+
:* --openssl=X:\\path\\to\\openssl.exe
    o-saft.pl +list --v
 
    o-saft.pl +certificate some.tld
 
    o-saft.pl +fingerprint  some.tld 444
 
    o-saft.pl +after +dates some.tld
 
  
===== Some Specials=====
+
:You have to fiddle around to find the proper one.
  
*  Get an idea how messages look like
+
===== Debug and Trace Output=====
  
    o-saft.pl +check --cipher=RC4 some.tld
+
: When both  [[#--trace-key|--trace-key]]  and  [[#--trace-cmd|--trace-cmd]]  options are used, output is
 +
: mixed, obviously. Hint: output for [[#--trace-cmd|--trace-cmd]] always contains "CMD".
  
Check for Server Name Indication (SNI) usage only
+
: Any  ''--trace*''  option implies [[#--trace-time|--trace-time]] .
  
    o-saft.pl +sni some.tld
+
==== DEPENDENCIES====
  
* Check for SNI and print certificate's subject and altname
+
:All Perl modules and all private moduels and files  will be searched
 +
:for using paths available in the  <code>@INC</code>  variable.  <code>@INC</code>  will
 +
:be prepended by following paths:
  
    o-saft.pl +sni +cn +altname some.tld
+
:*  .
 +
:*  ./lib
 +
:*  INSTALL_PATH
 +
:*  INSTALL_PATH/lib
  
* Check for all SNI, certificate's subject and altname issues
+
:Where <code>INSTALL_PATH</code>  is the path where the tool is installed.
 +
:To see which files have been included use:
  
     o-saft.pl +sni_check some.tld
+
     o-saft.pl +version --v --user
  
*  Only print supported ciphers
+
===== Perl Modules=====
  
    o-saft.pl +cipher --enabled some.tld
+
*  ''IO::Socket::SSL(3pm)''
 +
*  ''IO::Socket::INET(3pm)''
 +
*  ''Net::SSLeay(3pm)''
 +
*  ''Net::SSLinfo''
 +
*  ''Net::SSLhello''
  
*  Only print unsupported ciphers
+
:Perl modules loaded and used for some options only:
  
    o-saft.pl +cipher --disabled some.tld
+
* ''Net::DNS(3pm)''
 +
* ''Time::Local(3pm)''
  
*  Test for a specific ciphers
+
===== Additional Files used if requested=====
  
    o-saft.pl +cipher --cipher=ADH-AES256-SHA some.tld
+
*  ''.o-saft.pl''
 +
*  ''o-saft-dbx.pm''
 +
*  ''o-saft-man.pm''
 +
*  ''o-saft-usr.pm''
 +
*  ''o-saft-README''
 +
*  ''o-saft-docker''
  
* Test all ciphers, even if not supported by local SSL implementation
+
==== INSTALLATION====
    o-saft.pl +cipherall some.tld
 
    o-saft.pl +cipherall some.tld --range=full
 
    checkAllCiphers.pl example.tld --range=full --v
 
  
* Show supported (enabled) ciphers with their DH parameters:
+
:The tool can be installed in any path. It just requres the modules as
    o-saft.pl +cipher-dh some.tld
+
:described in  [[#DEPENDENCIES|DEPENDENCIES]]  above. However, it's recommended that the
 +
:modules ''Net::SSLhello'' and ''Net::SSLinfo'' are found in the directory
 +
:<code>./Net/</code>  where  <code>o-saft.pl</code>  is installed.
  
*  Test using a private libssl.so, libcrypto.so and openssl
+
:For security reasons, most modern libraries disabled or even removed
 +
:insecure or "dirty" functionality. As this tool's purpose is to find
 +
:such insecure settings, functions, etc., it needs these dirty things
 +
:enabled. What we need is (incomplete list):
  
    o-saft.pl +cipher --lib=/foo/bar-1.42 --exe=/foo/bar-1.42/apps some.tld
+
:* insecure protocols like SSLv2, SSLv3
 +
:* more more ciphers enabled, like NULL-MD5, AECDH-NULL-SHA, etc.
 +
:* some SSL extensions and options
  
*  Test using a private openssl
+
:Therefore we recommend to compile and install at least following:
  
    o-saft.pl +cipher --openssl=/foo/bar-1.42/openssl some.tld
+
:* openssl with SSLv2, SSLv3 and more ciphers enabled
 +
:* Net::SSLeay  compiled with openssl version as described before.
  
* Test using a private openssl also for testing supported ciphers
+
:Please read the [[#SECURITY|SECURITY]]  section first before following the install
 +
:instructions below.
  
    o-saft.pl +cipher --openssl=/foo/bar-1.42/openssl --force-openssl some.tld
+
=====OpenSSL=====
  
*  Show current score settings
+
:Currently (since 18.06.18) it is recommend to build openssl using
 +
    contrib/install_openssl.sh
  
    o-saft.pl --help=score
+
:Other possibilities are:
 +
:* compiling openssl using following sources
 +
::  [https://github.com/PeterMosmans/openssl/ https://github.com/PeterMosmans/openssl/]
 +
::  see  [[#Example: Compile OpenSSL|Example: Compile OpenSSL]],
 +
:* use any of the precomiled versions provided by https://testssl.sh/
  
* Change a single score setting
+
:The sources are available at
 +
:* [https://github.com/PeterMosmans/openssl/archive/1.0.2-chacha.zip https://github.com/PeterMosmans/openssl/archive/1.0.2-chacha.zip]
 +
:A precomiled static versions are available at
 +
:* [https://github.com/drwetter/testssl.sh/tree/master/bin https://github.com/drwetter/testssl.sh/tree/master/bin]
  
    o-saft.pl --cfg_score=http_https=42  +check some.tld
+
:For all following installation examples we assume:
 +
:* openssl-1.0.2-chacha.zip or openssl-1.0.2d.tar.gz
 +
:* /usr/local as bae installation directory
 +
:* a bourne shell (sh) compatible shell
  
*  Use your private score settings from a file
+
=====Example: Precompiled OpenSSL=====
  
    o-saft.pl --help=score > magic.score
+
:Simply download the tarball or zip file for your platform, unpack it,
:   # edit as needed: magic.score
+
:and install (copy) the binaries into a directory of your choice.
    o-saft.pl --cfg_score    magic.score  +check some.tld
 
  
*  Use your private texts in output
+
=====Example: Compile OpenSSL=====
  
    o-saft.pl +check some.tld --cfg_text=desc=<code>my special description</code>
+
:OpenSSL can be used from [http://openssl.org/ http://openssl.org/] or, as recommended, from
 +
:[https://github.com/PeterMosmans/openssl/ https://github.com/PeterMosmans/openssl/] .
  
*  Use your private texts from RC-FILE
+
:'''OpenSSL-chacha'''
 
+
:Compiling and installing the later is as simple as:
     o-saft.pl --help=cfg_text >> .o-saft.pl
+
     unzip openssl-1.0.2-chacha.zip
 
+
    cd openssl-1.0.2-chacha
:    # edit as needed:     .o-saft.pl
+
    ./config --shared -Wl,-rpath=/usr/local/lib
 +
    make
 +
    make test
 +
     make install
  
    o-saft.pl +check some.tld
+
:which will install openssl, libssl.so, libcrypto.so  and some include
 +
:files as well as the include files in  /usr/local/ .
 +
:The shared version of the libraries are necessary for  Net::SSLeay.
  
* Use your private hint texts in output
+
:'''OpenSSL.org'''
    o-saft.pl +check some.tld --cfg-hint=renegotiation="my special hint text"
+
:Building openssl from the offical  openssl.org  sources requires some
 +
:patching before compiling and installing the libraries and binaries.
  
* Get the certificate's Common Name for a bunch of servers:
+
:Example with openssl-1.0.2d:
    o-saft.pl +cn example.tld some.tld other.tld
 
    o-saft.pl +cn example.tld some.tld other.tld --showhost --no-header
 
  
* Generate simple parsable output
+
  echo == unpack tarball
 +
  tar xf openssl-1.0.2d.tar.gz
 +
  cd openssl-1.0.2d
 +
   
 +
  echo == backup files to be modified
 +
  cp ssl/s2_lib.c{,.bak}
 +
  cp ssl/s3_lib.c{,.bak}
 +
  cp ssl/ssl3.h{,.bak}
 +
  cp ssl/tls1.h{,.bak}
  
     o-saft.pl --legacy=quick --no-header +info  some.tld
+
  echo == patch files
 +
  vi ssl/tls1.h        +/TLS1_ALLOW_EXPERIMENTAL_CIPHERSUITES/
 +
            # define TLS1_ALLOW_EXPERIMENTAL_CIPHERSUITES  1
 +
  vi ssl/ssl3.h ssl/s{2,3}_lib.c  +"/# *if 0/"
 +
            #==> remove all  # if 0  and corresponding  #endif
 +
            #    except if lines contain:
 +
            #        _FZA
 +
            #        /* Fortezza ciphersuite from SSL 3.0
 +
            #        /* Do not set the compare functions,
 +
            #        if (s->shutdown & SSL_SEND_SHUTDOWN)
 +
 
 +
  echo == configure with static libraries
 +
  echo omitt the zlib options if zlib-1g-dev is not installed
 +
  echo omitt the krb5 options if no kerberos libraries available
 +
  ./config --prefix=/usr/local --openssldir=/usr/local/ssl \
 +
      enable-zlib zlib zlib-dynamic enable-ssl2 \
 +
      enable-krb5 --with-krb5-flavor=MIT \
 +
      enable-mdc2 enable-md2  enable-rc5  enable-rc2 \
 +
      enable-cms  enable-ec  enable-ec2m enable-ecdh enable-ecdsa \
 +
      enable-gost enable-seed enable-idea enable-camellia \
 +
      enable-rfc3779 enable-ec_nistp_64_gcc_128 \
 +
      experimental-jpake -fPIC \
 +
      -DTEMP_GOST_TLS -DTLS1_ALLOW_EXPERIMENTAL_CIPHERSUITES \
 +
      shared
 +
 
 +
  echo == make binaries and libraries
 +
  make depend
 +
  make
 +
  make test
 +
  make install
 +
 
 +
  echo == if you want static binaries and libraries
 +
  make clean
 +
  echo same ./config as before but without shared option
 +
  ./config --prefix=/usr/local --openssldir=/usr/local/ssl \
 +
      enable-zlib zlib zlib-dynamic enable-ssl2 \
 +
      enable-krb5 --with-krb5-flavor=MIT \
 +
      enable-mdc2 enable-md2 enable-rc5 enable-rc2 \
 +
      enable-cms  enable-ec  enable-ec2m enable-ecdh enable-ecdsa \
 +
      enable-gost enable-seed enable-idea enable-camellia \
 +
      enable-rfc3779 enable-ec_nistp_64_gcc_128 \
 +
      experimental-jpake -fPIC \
 +
      -DTEMP_GOST_TLS -DTLS1_ALLOW_EXPERIMENTAL_CIPHERSUITES
 +
  make depend
 +
  make
 +
  make test
 +
  echo next make will overwrite the previously installed dynamic
 +
  echo shared openssl binary with the static openssl binary
 +
  make install
 +
 
 +
=====Example: Compile Net::SSLeay=====
 +
 
 +
:To enable support for ancient protocol versions,  ''Net::SSLeay'' must be
 +
:compiled manually after patching 'SSLeay.xs' (see below).
 +
:Reason is, that  ''Net::SSLeay''  enables some functionality for  SSL/TLS
 +
:according the identified openssl version. There is, currently (2015),
 +
:no possibility to enable this functionality  by passing options on to
 +
:the configuration script <code>perl Makefile.PL</code>.
 +
 
 +
    echo == unpack tarball
 +
    tar xf Net-SSLeay-1.72.tar.gz
 +
    cd Net-SSLeay-1.72
 +
 
 +
    echo == patch files
 +
    echo "edit SSLeay.xs and change some #if as described below"
 +
    env OPENSSL_PREFIX=/usr/local perl Makefile.PL PREFIX=/usr/local \
 +
          INC=/usr/local/include  DEFINE=-DOPENSSL_BUILD_UNSAFE=1
 +
    make
 +
    make install
 +
    cd /tmp && o-saft.pl +version
 +
 
 +
:SSLeay.xs needs to be changed as follows:
 +
* search for
 +
    #ifndef OPENSSL_NO_SSL2
 +
    #if OPENSSL_VERSION_NUMBER < 0x10000000L
 +
 
 +
    const SSL_METHOD *
 +
    SSLv2_method()
 +
 
 +
    #endif
 +
    #endif
 +
 
 +
    #ifndef OPENSSL_NO_SSL3
 +
    #if OPENSSL_VERSION_NUMBER < 0x10002000L
 +
 +
    const SSL_METHOD *
 +
    SSLv3_method()
 +
 +
    #endif
 +
    #endif
 +
* and replace by
 +
    const SSL_METHOD *
 +
    SSLv2_method()
 +
 +
    const SSL_METHOD *
 +
    SSLv3_method()
 +
 
 +
:Note that  ''Net::SSLeay''  will be installed in <code>/usr/local/</code> then. This
 +
:can be adapted to your needs by passing another path to the  <code> PREFIX</code>
 +
:and  <code> DESTDIR</code>  parameter.
 +
 
 +
:Following command can be used to check  which methods are avilable in       
 +
:Net::SSLeay, hence above patches can be verified:                           
 +
                                                                             
 +
    perl -MLNet::SSLinfo -le print Net::SSLinfo::ssleay_test();
 +
 
 +
=====Testing OpenSSL=====
 +
 
 +
:After installation as descibed above finished, openssl may be tested:
 +
 
 +
    echo already installed openssl (found with PATH environment)
 +
    openssl ciphers -v
 +
    openssl ciphers -V -ssl2
 +
    openssl ciphers -V -ssl3
 +
    openssl ciphers -V ALL
 +
    openssl ciphers -V ALL:COMPLEMENTOFALL
 +
    openssl ciphers -V ALL:eNULL:EXP
 +
 
 +
    echo own compiled and installed openssl
 +
    /usr/local/openssl ciphers -v
 +
    /usr/local/openssl ciphers -V -ssl2
 +
    /usr/local/openssl ciphers -V -ssl3
 +
    /usr/local/openssl ciphers -V ALL
 +
    /usr/local/openssl ciphers -V ALL:COMPLEMENTOFALL
 +
    /usr/local/openssl ciphers -V ALL:eNULL:EXP
 +
 
 +
The difference should be obvious.
 +
Note, the commands using  <code>ALL:COMPLEMENTOFALL</code>  and  <code>ALL:eNULL:EXP</code>
 +
should return the same result.
 +
 
 +
=====Testing Net::SSLeay=====
 +
 
 +
:As we want to test the separately installed  ''Net::SSLeay'',  it is best
 +
:to do it with  <code>o-saft.pl</code>  itself:
 +
 
 +
    o-saft.pl +version
 +
 
 +
:we should see a line similar to follwong at the end of the output:
 +
 
 +
    Net::SSLeay  1.72  /usr/local/lib/x86_64-linux-gnu/perl/5.20.2/Net/SSLeay.pm
 +
 
 +
:Now check for supported (known) ciphers:
 +
 
 +
    o-saft.pl ciphers -V
 +
 
 +
:we should see lines similar to those of the last  <code>/usr/local/openssl</code>
 +
:call. However, it should contain more cipher lines.
 +
 
 +
=====Stand-alone Executable=====
 +
 
 +
:Some people asked for a stand-alone executable (mainly for Windows).
 +
:Even Perl is a scripting language there are situations where a stand-
 +
:alone executable would be nice, for example if the installed perl and
 +
:its libraries are outdated, or if perl is missing at all.
 +
 
 +
:Currently (2016) there are following possibilities to generate such a
 +
:stand-alone executable:
 +
 
 +
* perl with PAR::Packer module
 +
      pp -C -c o-saft.pl
 +
      pp -C -c o-saft.pl -M Net::DNS -M Net::SSLeay -M IO::Socket \
 +
                        -M Net::SSLinfo -M Net::SSLhello -M osaft
 +
      pp -C -c checkAllCiphers.pl
 +
      pp -C -c checkAllCiphers.pl -M Net::DNS
 +
 
 +
* ActiveState perl with its perlapp
 +
      perlapp --clean o-saft.pl
 +
      perlapp --clean o-saft.pl -M Net::DNS -M Net::SSLeay -M IO::Socket \
 +
                  -M Net::SSLinfo -M Net::SSLhello -M osaft
 +
      perlapp --clean checkAllCiphers.pl
 +
      perlapp --clean checkAllCiphers.pl -M Net::DNS -M osaft
 +
 
 +
* perl2exe from IndigoSTar
 +
      perl2exe o-saft.pl
 +
      perl2exe checkAllCiphers.pl
 +
 
 +
:For details  on building the executable,  for example how to include
 +
:all required modules, please refer to the documentation of the tool.
 +
:* http://search.cpan.org/~rschupp/PAR-Packer-1.030/lib/PAR/Packer.pm
 +
:* http://docs.activestate.com/pdk/6.0/PerlApp.html
 +
:* http://www.indigostar.com
 +
 
 +
:Note that  pre-build executables (build by perlapp, perl2exe) cannot
 +
:be provided due to licence problems.
 +
:Also note that using stand-alone executable have not been tested the
 +
:same way as the <code>o-saft.pl</code> itself. Use them at your own risk.
 +
 
 +
==== DOCKER====
 +
:The tool can be used inside a Docker image. To start  ''o-saft.pl''  inside
 +
:the Docker image, use following:
 +
 
 +
  o-saft-docker +info some.tld
 +
 
 +
:or
 +
  docker run --rm -it owasp/o-saft +info some.tld
 +
 
 +
:For more details, please refer to:     
 +
 
 +
  o-saft-docker -help
 +
  o-saft-docker usage
 +
 
 +
====BUILD DOCKER IMAGE====
 +
 
 +
:The Docker image can be installed as follows:
 +
 
 +
  docker pull owasp/o-saft
 +
 
 +
:The image can also easily be build from the Dockerfile (which is part
 +
:of the distribution) as follows:
 +
 
 +
  o-saft-docker build
 +
 
 +
:To build the image from the Dockerfile with docker commands, see:
 +
 
 +
  o-saft-docker -n build
 +
 
 +
:For more details, please refer to:
 +
 
 +
  o-saft-docker -help
 +
 
 +
==== SEE ALSO====
 +
 
 +
* ''openssl(1)'', ''Net::SSLeay(3pm)'', ''Net::SSLhello'', ''Net::SSLinfo'', ''timeout(1)''
 +
* http://www.openssl.org/docs/apps/ciphers.html
 +
* ''IO::Socket::SSL(3pm)'', ''IO::Socket::INET(3pm)''
 +
* ''o-saft-docker'', ''o-saft-docker-dev'', ''Dockerfile'', ''docker''
 +
 
 +
==== HACKER's INFO====
 +
 
 +
=====Note on SSL versions=====
 +
 
 +
:Automatically detecting the supported SSL versions of the underlaying
 +
:system is a hard job and not always possible. Reasons could be:
 +
 
 +
* used Perl modules (''Socket::SSL'', ''Net::SSLeay'') does not handle errors
 +
:properly. Erros may be:
 +
  invalid SSL_version specified at ... IO/Socket/SSL.pm
 +
 
 +
  Use of uninitialized value in subroutine entry at lib/IO/Socket/SSL.pm
 +
 
 +
* the underlaying libssl does not support the version, which then may
 +
:result in segmentation fault
 +
 
 +
* the underlaying libssl is newer than the Perl module and the module
 +
:has not been reinstalled. This most often happens with  ''Net::SSLeay''
 +
:This can be detected with (see version numbers for  ''Net::SSLeay''):
 +
    o-saft.pl +version
 +
 
 +
* perl (in particular a used module, see above)  may bail out with a
 +
:compile error, like
 +
    Can't locate auto/Net/SSLeay/CTX_v2_new.al in @INC ...
 +
 
 +
:We try to detect unsupported versions and disable them automatically,
 +
:a warning like follwoing is shown then:
 +
    **WARNING: SSL version <code>SSLv2</code> not supported by openssl
 +
 
 +
:If problems occour with  SSL versions, following commands and options
 +
:may help to to get closer to the reason or can be used as workaround:
 +
    o-saft.pl +version
 +
    o-saft.pl +version | grep versions
 +
    o-saft.pl +version | grep 0x
 +
    o-saft.pl +protocols your.tld
 +
    o-saft.pl +protocols your.tld --no-rc
 +
 
 +
:If problems occour with  SSL versions, following commands and options
 +
:Checking for SSL version is done at one place in the code, search for
 +
    supported SSL versions
 +
 
 +
===== Using private libssl.so and libcrypt.so=====
 +
 
 +
:For all  cryptographic functionality  the libraries  installed on the
 +
:system will be used. This is in particular Perl's  ''Net:SSLeay'' module,
 +
:the system's  ''libssl.so'' and ''libcrypt.so''  and the ''openssl'' executable.
 +
 
 +
:It is possible to provide your own libraries, if the  P module and
 +
:the executable are  linked using  dynamic shared objects  (aka shared
 +
:library, position independent code).
 +
:The appropriate option is  ''--lib=PATH''  .
 +
 
 +
:On most systems these libraries are loaded at startup of the program.
 +
:The runtime loader uses a preconfigured list of directories  where to
 +
:find these libraries. Also most systems provide a special environment
 +
:variable to specify  additional paths  to directories where to search
 +
:for libraries, for example the  <code>LD_LIBRARY_</code> variable.
 +
:This is the default environment variable used herein.  If your system
 +
:uses  another name it must be specified with the  ''--envlibvar=NAME''
 +
:option, where  <code>NAME</code>  is the name of the environment variable.
 +
 
 +
===== Understanding  ''--exe=PATH'', ''--lib=PATH'', ''--openssl=FILE''=====
 +
 
 +
:If any of [[#--exe=PATH|--exe=PATH]] or [[#--lib=PATH|--lib=PATH]] is provided, the pragram calls
 +
:(<code>exec</code>) itself recursively with all given options, except the option
 +
:itself. The environment variables  <code>LD_LIBRARY_PATH</code>  and <code>PATH</code>  are
 +
:set before executing as follows:
 +
 
 +
:*  prepend  <code>PATH</code>  with all values given with  [[#--exe=PATH|--exe=PATH]]
 +
:*  prepend  <code>LD_LIBRARY_PATH</code>  with all values given with  [[#--lib=PATH|--lib=PATH]]
 +
 
 +
:This is exactly, what [[#Cumbersome Approach|Cumbersome Approach]] below describes. So these
 +
:option simply provide a shortcut for that.
 +
 
 +
:Note that [[#--openssl=TOOL|--openssl=TOOL]] is a full path to the ''openssl'' executable
 +
:and will not be changed.  However, if it is a relative path, it might
 +
:be searched for using the previously set  <code>PATH</code>  (see above).
 +
 
 +
:Note that  <code>LD_LIBRARY_PATH</code>  is the default.  It can be changed with
 +
:the  [[#--envlibvar=NAME|--envlibvar=NAME]]  option.
 +
 
 +
:While  ''--exe''  mainly impacts the openssl executable,  ''--lib''  also
 +
:impacts o-saft.pl itself, as it loads other shared libraries if found.
 +
 
 +
:Bear in mind that  all these options  can affect the behaviour of the
 +
:openssl subsystem,  influencing both which  executable is called  and
 +
:which shared libraries will be used.
 +
 
 +
:NOTE that no checks are done if the options are set proper. To verify
 +
:the settings, following commands may be used:
 +
    o-saft.pl --lib=YOU-PATH --exe=YOUE-EXE +version
 +
    o-saft.pl --lib=YOU-PATH --exe=YOUE-EXE --v +version
 +
    o-saft.pl --lib=YOU-PATH --exe=YOUE-EXE --v --v +version
 +
 
 +
 
 +
:Why so many options?  Exactly as described above, these options allow
 +
:the users to tune the behaviour of the tool to their needs.  A common
 +
:use case is to enable the use of a separate openssl build independent
 +
:of the openssl package used by the operating system.  This allows the
 +
:user fine grained control over openssl's encryption suites  which are
 +
:compiled/available, without affecting the core system.
 +
 
 +
===== Caveats=====
 +
 
 +
:Depending on your system and the used modules and executables, it can
 +
:be tricky to replace the configured shared libraries with own ones.
 +
:Reasons are:
 +
:  a) the linked library name contains a version number,
 +
:  b) the linked library uses a fixed path,
 +
:  c) the linked library is searched at a predefined path,
 +
:  d) the executable checks the library version when loaded.
 +
 
 +
:Only the first one a) can be circumvented.  The last one d) can often
 +
:be ignored as it only prints a warning or error message.
 +
 
 +
:To circumvent the "name with version number" problem try following:
 +
 
 +
*  1. use ''ldd'' (or a similar tool) to get the names used by ''openssl'':
 +
 
 +
:  ldd /usr/bin/openssl
 +
 
 +
:which returns something like:
 +
 
 +
:  libssl.so.0.9.8 => /lib/libssl.so.0.9.8 (0x00007f940cb6d000)
 +
:  libcrypto.so.0.9.8 => /lib/libcrypto.so.0.9.8 (0x00007f940c7de000)
 +
:  libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f940c5d9000)
 +
:  libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f940c3c1000)
 +
:  libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f940c02c000)
 +
:  /lib64/ld-linux-x86-64.so.2 (0x00007f940cdea000)
 +
 
 +
:Here only the first two libraries are important.  Both,  libcrypto.so
 +
:and libssl.so  need to be version "0.9.8" (in this example).
 +
 
 +
*  2. create a directory for your libraries, i.e.:
 +
 
 +
:  mkdir /tmp/dada
 +
 
 +
*  3. place your libraries there, assuming they are:
 +
 
 +
:  /tmp/dada/libssl.so.1.42
 +
:  /tmp/dada/libcrypto.so.1.42
 +
 
 +
*  4. create symbolic links in that directory:
 +
 
 +
:  ln -s libssl.so.1.42    libssl.so.0.9.8
 +
:  ln -s libcrypto.so.1.42 libcrypto.so.0.9.8
 +
 
 +
*  5. test program with following option:
 +
 
 +
    o-saft.pl +libversion --lib=/tmp/dada
 +
    o-saft.pl +list --v  --lib=/tmp/dada
 +
 
 +
:  or:
 +
 
 +
    o-saft.pl +libversion --lib=/tmp/dada -exe=/path/to-openssl
 +
    o-saft.pl +list --v  --lib=/tmp/dada -exe=/path/to-openssl
 +
 
 +
*  6. start program with your options, i.e.:
 +
 
 +
    o-saft.pl --lib=/tmp/dada +ciphers
 +
 
 +
:This works if ''openssl(1)'' uses the same shared libraries as
 +
:''Net:SSLeay(3pm)'', which most likely is the case.
 +
 
 +
:It's tested with Unix/Linux only. It may work on other platforms also
 +
:if they support such an environment variable and the installed
 +
:''Net::SSLeay(3pm)''  and ''openssl(1)''  are linked using dynamic shared
 +
:objects.
 +
 
 +
:Depending on  compile time settings  and/or  the location of the used
 +
:tool or lib, a warning like following may occur:
 +
 
 +
  WARNING: can't open config file: /path/to/openssl/ssl/openssl.cnf
 +
 
 +
:This warning can be ignored, usually as  ''req''  or  ''ca''  sub commands of
 +
:openssl is not used here.
 +
:To fix the problem, either use  ''--openssl-cnf=FILE''  option or set the
 +
:the environment variable OPENSSL_CONF properly.
 +
 
 +
====== Cumbersome Approach======
 +
 
 +
:A more cumbersome approach to call  this program is to set  following
 +
:environment variables in your shell:
 +
 
 +
  PATH=/tmp/dada-1.42/apps:$PATH
 +
  LD_LIBRARY_PATH=/tmp/dada-1.42
 +
 
 +
====== Windows Caveats======
 +
 
 +
:I.g. the used libraries on Windows are ''libeay32.dll'' and ''ssleay32.dll''.
 +
 
 +
:Windows also supports the <code>LD_LIBRARY_PATH</code> environment variable. If it
 +
:does not work as expected with that variable, it might be possible to
 +
:place the libs in the same directory as the  corresponding executable
 +
:(which is found by the <code>PATH</code> environment variable).
 +
 
 +
===== Using CGI mode=====
 +
 
 +
:This script can be used as  CGI application. Output is the same as in
 +
:common CLI mode, using  'Content-Type:text/plain'.  Keep in mind that
 +
:the used modules like  ''Net::SSLeay''  will write some debug messages
 +
:on STDERR instead STDOUT. Therefore multiple  ''--v'' and/or  ''--trace''
 +
:options behave slightly different.
 +
 
 +
:No additional external files like [[#RC-FILE|RC-FILE]] or  [[#DEBUG-FILE|DEBUG-FILE]] are read
 +
:in CGI mode; they are silently ignored.
 +
:Some options are disabled in CGI mode  because they are dangerous  or
 +
:don't make any sense.
 +
 
 +
====== WARNING======
 +
 
 +
:  There are  no  input data validation checks implemented herein. All
 +
:  input data is url-decoded once and then used verbatim.
 +
:  More advanced checks must be done outside before calling this tool.
 +
 
 +
:It's not recommended to run this tool in CGI mode.
 +
:You have been warned!
 +
 
 +
===== Using user specified code=====
 +
 
 +
:There are some functions called within the program flow, which can be
 +
:filled with any Perl code.  Empty stubs of the functions are prepared
 +
:in  ''o-saft-usr.pm''.  See also  [[#USER-FILE|USER-FILE]].
 +
 
 +
==== DEBUG====
 +
 
 +
===== Debugging, Tracing=====
 +
 
 +
:Following  options and commands  are useful for hunting problems with
 +
:SSL connections and/or this tool. Note that some options can be given
 +
:multiple times to increase amount of listed information. Also keep in
 +
:mind that it's best to specify  ''--v''  as very first argument.
 +
 
 +
:Note that the file  ''o-saft-dbx.pm''  is required, if any  ''--trace*''
 +
:or  ''--v''  option is used.
 +
 
 +
====== Commands======
 +
 
 +
*  ''+dump''
 +
*  ''+libversion''
 +
*  ''+s_client''
 +
*  ''+todo''
 +
*  ''+version''
 +
 
 +
====== Options======
 +
 
 +
*  ''--v''
 +
*  ''--v--''
 +
*  ''--trace''
 +
*  ''--trace-arg''
 +
*  ''--trace-cmd''
 +
*  ''--trace-key''
 +
 
 +
:Empty or undefined strings are written as  <code><<undefined>></code>  in texts.
 +
:Some parameters, in particular those of  HTTP responses,  are written
 +
:as  <code><<response>></code>.  Long parameter lists are abbreviated with <code>...</code>.
 +
 
 +
====== Output======
 +
 
 +
:When using  ''--v''  and/or  ''--trace''  options, additional output will
 +
:be prefixed with a  <code>#</code>  (mainly as first, left-most character.
 +
:Following formats are used:
 +
 
 +
:*  #[space]
 +
 
 +
:    Addition text for verbosity (''--v'' options).
 +
 
 +
:*  #[variable name][TAB]
 +
 
 +
:    Internal variable name (''--trace-key'' options).
 +
 
 +
:*  #o-saft.pl::
 +
:*  #Net::SSLinfo::
 +
 
 +
:    Trace information for ''--trace''  options.
 +
 
 +
:*  #{
 +
 
 +
:    Trace information from  <code>NET::SSLinfo</code>  for  ''--trace''  options.
 +
:    These are data lines in the format:  #{ variable name : value #}
 +
:    Note that  <code>value</code>  here can span multiple lines and ends with #}
 +
 
 +
====== Using outdated modules======
 +
 
 +
:The tools was designed to work with old Perl modules too.  When using
 +
:old modules, a proper  <code>**WARNING:</code>  will be printed. These warinings
 +
:cannot be switched of using  --no-warning  .
 +
:The warning also informs about the missing functionality or check.
 +
 
 +
:I.g. it is best to install newer versions of the module if possible.
 +
:A good practice to check if modules are available in a proper version
 +
:is to call:
 +
 
 +
  o-saft.pl +version
 +
  o-saft.pl +version --v --v
 +
 
 +
:Following example shows the result without warnings:
 +
 
 +
      === reading: ./.o-saft.pl (RC-FILE done) ===
 +
      === reading: Net/SSLhello.pm (O-Saft module done) ===
 +
      === reading: Net/SSLinfo.pm (O-Saft module done) ===
 +
      === ./o-saft.pl 16.09.09 ===
 +
          Net::SSLeay::
 +
            ::OPENSSL_VERSION_NUMBER()    0x268443744
 +
            ::SSLeay()                    0x268443744
 +
          Net::SSLeay::SSLeay_version()    OpenSSL 1.0.2-chacha (1.0.2f-dev)
 +
      = openssl =
 +
          version of external executable  OpenSSL 1.0.2-chacha (1.0.2f-dev)
 +
          external executable              /opt/openssl-chacha/bin/openssl
 +
          used environment variable (name) LD_LIBRARY_PATH
 +
          environment variable (content)  <<undef>>
 +
          path to shared libraries       
 +
          full path to openssl.cnf file    <<undef>>
 +
          common openssl.cnf files        /usr/lib/ssl/openssl.cnf \
 +
                                          /etc/ssl/openssl.cnf \
 +
                                          /System//Library/OpenSSL/openssl.cnf \
 +
                                          /usr/ssl/openssl.cnf
 +
          URL where to find CRL file      <<undef>>
 +
          directory with PEM files for CAs /opt/tools/openssl-chacha/ssl/certs
 +
          PEM format file with CAs        /etc/ssl/certs/ca-certificates.crt
 +
          common paths to PEM files for CAs /etc/ssl/certs /usr/lib/certs \
 +
                                            /System/Library/OpenSSL
 +
          common PEM filenames for CAs    ca-certificates.crt \
 +
                                          certificates.crt certs.pem
 +
          number of supported ciphers      177
 +
          openssl supported SSL versions  SSLv3 TLSv1 TLSv11 TLSv12
 +
          o-saft.pl known SSL versions    SSLv2 SSLv3 TLSv1 TLSv11 TLSv12 TLSv13 \
 +
                                          DTLSv09 DTLSv1 DTLSv11 DTLSv12 DTLSv13
 +
      = o-saft.pl +cipherall =
 +
          default list of ciphers          0x03000000 .. 0x030000FF, 0x0300C000 .. 0x0300C0FF, \
 +
                                          0x0300CC00 .. 0x0300CCFF, 0x0300FE00 .. 0x0300FFFF,
 +
                                         
 +
      = Required (and used) Modules =
 +
          @INC                ./ ./lib . /bin /usr/share/perl5 \
 +
                              /usr/lib/x86_64-linux-gnu/perl5/5.20 \
 +
                              /usr/lib/x86_64-linux-gnu/perl/5.20 \
 +
                              /usr/share/perl/5.20 /usr/local/lib/site_perl .
 +
      =  module name            VERSION  found in
 +
      =  ----------------------+--------+------------------------------------------
 +
          IO::Socket::INET      1.35    /usr/lib/x86_64-linux-gnu/perl/5.20/IO/Socket/INET.pm
 +
          IO::Socket::SSL        2.002    /usr/share/perl5/IO/Socket/SSL.pm
 +
          Net::DNS              0.81    /usr/lib/x86_64-linux-gnu/perl5/5.20/Net/DNS.pm
 +
          Net::SSLeay            1.72    /usr/lib/x86_64-linux-gnu/perl5/5.20/Net/SSLeay.pm
 +
          Net::SSLinfo          16.06.01 Net/SSLinfo.pm
 +
          Net::SSLhello          16.05.16 Net/SSLhello.pm
 +
          osaft                  16.05.10 osaft.pm
 +
 
 +
:Following example shows the result with warnings:
 +
 
 +
      === reading: ./.o-saft.pl (RC-FILE done) ===
 +
      === reading: ./Net/SSLhello.pm (O-Saft module done) ===
 +
      **WARNING: ancient Net::SSLeay 1.35 < 1.49; cannot use ::initialize at /Net/SSLinfo.pm line 481.
 +
      === reading: ./Net/SSLinfo.pm (O-Saft module done) ===
 +
      **WARNING: ancient perl has no 'version' module; version checks may not be accurate; at o-saft.pl line 1662.
 +
      **WARNING: ancient Net::SSLeay 1.35 < 1.49 detected; at o-saft.pl line 1687.
 +
      **WARNING: ancient IO::Socket::SSL 1.22 < 1.37 detected; at o-saft.pl line 1687.
 +
      **WARNING: ancient version IO::Socket::SSL 1.22 < 1.90 does not support SNI or is known to be buggy; SNI disabled; at o-saft.pl line 5905.
 +
      !!Hint: --force-openssl can be used to disables this check
 +
      **WARNING: ancient version Net::SSLeay 1.35 < 1.49  may throw warnings and/or results may be missing; at o-saft.pl line 5934.
 +
      **WARNING: SSL version 'TLSv11': not supported by Net::SSLeay; not checked
 +
      **WARNING: SSL version 'TLSv12': not supported by Net::SSLeay; not checked
 +
      **WARNING: SSL version 'TLSv13': not supported by Net::SSLeay; not checked
 +
      === o-saft.pl 16.09.09 ===
 +
          Net::SSLeay::
 +
            ::OPENSSL_VERSION_NUMBER()    0x9470143
 +
      **WARNING: ancient version Net::SSLeay 1.35 < 1.49; cannot compare SSLeay with openssl version at o-saft.pl line 4778.
 +
            ::SSLeay()                    0x1.35
 +
      **WARNING: ancient version Net::SSLeay 1.35 < 1.49; detailed version not available at o-saft.pl line 4806.
 +
      = openssl =
 +
          version of external executable  OpenSSL 0.9.8y 5 Feb 2013
 +
          external executable              /usr/bin/openssl
 +
          used environment variable (name) LD_LIBRARY_PATH
 +
          environment variable (content)  <<undef>>
 +
          path to shared libraries
 +
          full path to openssl.cnf file    <<undef>>
 +
          common openssl.cnf files        /usr/lib/ssl/openssl.cnf \
 +
                                          /etc/ssl/openssl.cnf \
 +
                                          /System//Library/OpenSSL/openssl.cnf \
 +
                                          /usr/ssl/openssl.cnf
 +
          URL where to find CRL file      <<undef>>
 +
          directory with PEM files for CAs /System/Library/OpenSSL/certs
 +
          PEM format file with CAs        <<undef>>
 +
          common paths to PEM files for CAs /etc/ssl/certs /usr/lib/certs /System/Library/OpenSSL
 +
          common PEM filenames for CAs    ca-certificates.crt certificates.crt certs.pem
 +
          number of supported ciphers      43
 +
          openssl supported SSL versions  SSLv2 SSLv3 TLSv1
 +
          o-saft.pl known SSL versions    SSLv2 SSLv3 TLSv1 TLSv11 TLSv12 TLSv13 \
 +
                                          DTLSv09 DTLSv1 DTLSv11 DTLSv12 DTLSv13
 +
      **WARNING: ancient version Net::SSLeay 1.35 < 1.49; cannot compare SSLeay with openssl version at o-saft.pl line 4778.
 +
      **WARNING: used openssl version '9470143' differs from compiled Net:SSLeay '1.35'; ignored
 +
      = o-saft.pl +cipherall =
 +
          default list of ciphers          0x03000000 .. 0x030000FF, 0x0300C000 .. 0x0300C0FF,
 +
                                          0x0300CC00 .. 0x0300CCFF, 0x0300FE00 .. 0x0300FFFF,
 +
      = Required (and used) Modules =
 +
          @INC                ./ ./lib /bin /Library/Perl/Updates/5.10.0 \
 +
                              /System/Library/Perl/5.10.0/darwin-thread-multi-2level \
 +
                              /System/Library/Perl/5.10.0 \
 +
                              /Library/Perl/5.10.0/darwin-thread-multi-2level \
 +
                              /Library/Perl/5.10.0 \
 +
                              /Network/Library/Perl/5.10.0/darwin-thread-multi-2level \
 +
                              /Network/Library/Perl/5.10.0 \
 +
                              /Network/Library/Perl \
 +
                              /System/Library/Perl/Extras/5.10.0/darwin-thread-multi-2level \
 +
                              /System/Library/Perl/Extras/5.10.0 .
 +
      =  module name            VERSION  found in
 +
      =  ----------------------+--------+------------------------------------------
 +
          IO::Socket::INET      1.31    /System/Library/Perl/5.10.0/darwin-thread-multi-2level/IO/Socket/INET.pm
 +
          IO::Socket::SSL        1.22    /System/Library/Perl/Extras/5.10.0/IO/Socket/SSL.pm
 +
          Net::DNS              0.65    /System/Library/Perl/Extras/5.10.0/darwin-thread-multi-2level/Net/DNS.pm
 +
          Net::SSLeay            1.35    /System/Library/Perl/Extras/5.10.0/darwin-thread-multi-2level/Net/SSLeay.pm
 +
          Net::SSLinfo          16.06.01 ./Net/SSLinfo.pm
 +
          Net::SSLhello          16.05.16 ./Net/SSLhello.pm
 +
          osaft                  16.05.10 /osaft.pm
 +
 
 +
:Please keep in mind that the shown version numbers and the shown line 
 +
:numbers are examples and may differ on your system.
 +
 
 +
:When starting <code>o-saft.pl</code> with outdated modules, more <code>**WARNING:</code> will 
 +
:be shown. The warnings depend on the installed version of the module. 
 +
:<code>o-saft.pl</code> is known to work with at least:                                   
 +
:* ''IO::Socket::INET'' 1.31, ''IO::Socket::SSL'' 1.22, ''Net::DNS'' 0.66, ''Net::SSLeay'' 1.30
 +
 
 +
====TESTING====
 +
:When talking about "testing the tool", functionl tests are meant.  So
 +
:this section describes "developer" rather than "user" options.
 +
 
 +
:Testing the tool is a challenging task. Beside the oddities described
 +
:elsewhere, for example  [[#Name Rodeo|Name Rodeo]],  there are a bunch of problems
 +
:and error which may occour during runtime.
 +
 
 +
:Makefiles are used for testing  functionality and code quality during
 +
:development. These tests are implemented in the  <code>./t/</code>  directory, see
 +
:the <code>Makefile.*</code> there.
 +
 
 +
:Following options and commands for  <code>o-saft.pl</code> are available to improve
 +
:testing.  They mainly can simulate error conditions or stop execution
 +
:properly (they are not intended for other use cases):
 +
 
 +
======+quit======
 +
 
 +
:Stop execution after processing all arguments and before precessing
 +
:any target. The runtime configuration is complete at this point.
 +
 
 +
======--exit=KEY======
 +
 
 +
:Terminate  <code>o-saft.pl</code>  at specified <code>KEY</code>.  For available <code>KEY</code> please see:
 +
    o-saft.pl --help=exit
 +
    grep exit= o-saft.pl
 +
 
 +
======--cfg-init=KEY=VALUE======
 +
:With this option values in the internal  %cfg  hash can be set:
 +
 
 +
    $cfg{KEY} = VALUE
 +
 
 +
:Only (perl) scalars or arrays can be set. The type will be detected
 +
:automatically.
 +
 
 +
:Example,  this option can be used to change the text used as prefix
 +
:in each output line triggerd by the  ''--v''  option:
 +
    o-saft.pl --cfg-init=prefix_verbose="#VERBOSE: "
 +
 
 +
:or the text used as prefix triggerd by the  ''--trace''  option:
 +
    o-saft.pl --cfg-init=prefix_trace="#TRACE: "
 +
 
 +
======--v======
 +
:Print more information about checks.
 +
 
 +
======--trace======
 +
:Print debugging messages.
 +
 
 +
:For more details, please see  [[#Options for tracing and debugging|Options for tracing and debugging]] .
 +
 
 +
=====Internal testing=====
 +
:Following options and commands for  <code>o-saft.pl</code>  are for internal testing.
 +
:They provide informations about internal data structures and alike.
 +
:See also tests in t/Makefile* .
 +
:These options behave like the command  +quit  and  do not perform any
 +
:checks on the target(s).
 +
 
 +
======--test-data======
 +
:Print overview of all available commands and checks.
 +
 
 +
======--test-maps======
 +
:Print internal data strucures <code>%cfg{openssl}</code>, <code>%cfg{ssleay}</code>.
 +
 
 +
======--test-prot======
 +
:Print internal data according protocols.
 +
 
 +
======--test-regex======
 +
:Print results for applying various texts to defined regex.
 +
 
 +
======--test-subs======
 +
:Print formatted list of internal functions with their description.
 +
:Not to be intended in conjunction with any target check.
 +
 
 +
======--test-cipher-list======
 +
:Print list of hex keys of known ciphers.
 +
 
 +
======--test-cipher-show======
 +
:Print complete list of ciphers.
 +
 
 +
======--test-cipher-sorted======
 +
:Print list of ciphers sorted according strength.
 +
 
 +
==== EXAMPLES====
 +
 
 +
:($0 in all following examples is the name of the tool)
 +
 
 +
===== General=====
 +
 
 +
    o-saft.pl +cipher some.tld
 +
    o-saft.pl +info  some.tld
 +
    o-saft.pl +check  some.tld
 +
    o-saft.pl +quick  some.tld
 +
    o-saft.pl +help=commands
 +
    o-saft.pl +list
 +
    o-saft.pl +list --v
 +
    o-saft.pl +certificate  some.tld
 +
    o-saft.pl +fingerprint  some.tld 444
 +
    o-saft.pl +after +dates some.tld
 +
 
 +
===== Some Specials=====
 +
 
 +
*  Get an idea how messages look like
 +
 
 +
    o-saft.pl +check --cipher=RC4 some.tld
 +
 
 +
*  Check for Server Name Indication (SNI) usage only
 +
 
 +
    o-saft.pl +sni some.tld
 +
 
 +
*  Check for SNI and print certificate's subject and altname
 +
 
 +
    o-saft.pl +sni +cn +altname some.tld
 +
 
 +
*  Check for all SNI, certificate's subject and altname issues
 +
 
 +
    o-saft.pl +sni_check some.tld
 +
 
 +
*  Only print supported ciphers
 +
 
 +
    o-saft.pl +cipher --enabled some.tld
 +
 
 +
*  Only print unsupported ciphers
 +
 
 +
    o-saft.pl +cipher --disabled some.tld
 +
 
 +
*  Test for a specific ciphers
 +
 
 +
    o-saft.pl +cipher --cipher=ADH-AES256-SHA some.tld
 +
 
 +
* Test all ciphers, even if not supported by local SSL implementation
 +
    o-saft.pl +cipherraw some.tld
 +
    o-saft.pl +cipherall some.tld
 +
    o-saft.pl +cipherall some.tld --range=full
 +
    checkAllCiphers.pl example.tld --range=full --v
 +
 
 +
* Show supported (enabled) ciphers with their DH parameters:
 +
    o-saft.pl +cipher-dh some.tld
 +
 
 +
*  Test using a private libssl.so, libcrypto.so and openssl
 +
 
 +
    o-saft.pl +cipher --lib=/foo/bar-1.42 --exe=/foo/bar-1.42/apps some.tld
 +
 
 +
*  Test using a private openssl
 +
 
 +
    o-saft.pl +cipher --openssl=/foo/bar-1.42/openssl some.tld
 +
 
 +
*  Test using a private openssl also for testing supported ciphers
 +
 
 +
    o-saft.pl +cipher --openssl=/foo/bar-1.42/openssl --force-openssl some.tld
 +
 
 +
*  Show current score settings
 +
 
 +
    o-saft.pl --help=score
 +
 
 +
*  Change a single score setting
 +
 
 +
    o-saft.pl --cfg_score=http_https=42  +check some.tld
 +
 
 +
*  Use your private score settings from a file
 +
 
 +
    o-saft.pl --help=score > magic.score
 +
:    # edit as needed: magic.score
 +
    o-saft.pl --cfg_score    magic.score  +check some.tld
 +
 
 +
*  Use your private texts in output
 +
 
 +
    o-saft.pl +check some.tld --cfg_text=desc=<code>my special description</code>
 +
 
 +
*  Use your private texts from RC-FILE
 +
 
 +
    o-saft.pl --help=cfg_text >> .o-saft.pl
 +
 
 +
:    # edit as needed:    .o-saft.pl
 +
 
 +
    o-saft.pl +check some.tld
 +
 
 +
* Use your private hint texts in output
 +
    o-saft.pl +check some.tld --cfg-hint=renegotiation="my special hint text"
 +
 
 +
* Get the certificate's Common Name for a bunch of servers:
 +
    o-saft.pl +cn example.tld some.tld other.tld
 +
    o-saft.pl +cn example.tld some.tld other.tld --showhost --no-header
 +
 
 +
*  Generate simple parsable output
 +
 
 +
     o-saft.pl --legacy=quick --no-header +info  some.tld
 
     o-saft.pl --legacy=quick --no-header +check some.tld
 
     o-saft.pl --legacy=quick --no-header +check some.tld
     o-saft.pl --legacy=quick --no-header --trace-key +info  some.tld
+
     o-saft.pl --legacy=quick --no-header --trace-key +info  some.tld
     o-saft.pl --legacy=quick --no-header --trace-key +check some.tld
+
     o-saft.pl --legacy=quick --no-header --trace-key +check some.tld
 +
 
 +
*  Generate simple parsable output for multiple hosts
 +
 
 +
    o-saft.pl --legacy=quick --no-header --trace-key --showhost +check some.tld other.tld
 +
 
 +
*  Just for curiosity
 +
 
 +
    o-saft.pl some.tld +fingerprint --format=raw
 +
    o-saft.pl some.tld +certificate --format=raw | openssl x509 -noout -fingerprint
 +
 
 +
===== Testing with exit code=====
 +
* Test SSL/TLS connection and return exit code
 +
    o-saft.pl +check  --exitcode  some.tld
 +
 
 +
* Test ciphers and return exit code with details about exit code
 +
    o-saft.pl +cipher --exitcode --exitcode-v  some.tld
 +
 
 +
* Test ciphers and return exit code for ciphers only
 +
    o-saft.pl +cipher --exitcode --exitcode-no-prot  some.tld
 +
 
 +
* Test with exit code but avoid checks considered 'yes' even if 'no'
 +
    o-saft.pl +check  --exitcode --ignore-out=ev- --ignore-out=rfc_7525 some.tld
 +
 
 +
===== Specials for hunting problems with connections etc.=====
 +
 
 +
*  Show command line argument processing
 +
 
 +
    o-saft.pl +info some.tld --trace-arg
 +
 
 +
*  Simple tracing
 +
 
 +
    o-saft.pl +cn  some.tld --trace
 +
    o-saft.pl +info some.tld --trace
 +
 
 +
*  A bit more tracing
 +
 
 +
    o-saft.pl +cn  some.tld --trace --trace
 +
 
 +
* Show internal variable names in output
 +
 
 +
    o-saft.pl +info some.tld --trace-key
 +
 
 +
* Show internal argument processeing
 +
 
 +
    o-saft.pl +info --trace-arg some.tld
 +
 
 +
* Show internal control flow
 +
 
 +
    o-saft.pl +info some.tld --trace-cmd
 +
 
 +
* Show internal timing
 +
 
 +
    o-saft.pl +info some.tld --trace-time
 +
 
 +
* Show checking ciphers
 +
 
 +
    o-saft.pl +cipher some.tld --v --v
 +
<!-- following no longer implemented (8/2016)
 +
*  List checked ciphers one per line
 +
 
 +
    o-saft.pl +cipher some.tld --v --v -v
 +
 
 +
*  Show processing of ciphers
 +
 
 +
    o-saft.pl +cipher some.tld --v --v --v -v
 +
-->
 +
 
 +
*  Show values retrieved from target certificate directly
 +
 
 +
    o-saft.pl +info some.tld --no-cert --no-cert --no-cert-text=Value-from-Certificate
 +
 
 +
*  Show certificate CA verifications
 +
 
 +
    o-saft.pl some.tld +chain_verify +verify +error_verify +chain
 +
 
 +
*  Avoid most performance and timeout problems (don't use  --v)
  
*  Generate simple parsable output for multiple hosts
+
    o-saft.pl +info some.tld --no-dns --no-sni --ignore-no-conn
 +
    o-saft.pl +info some.tld --no-dns --no-sni --no-cert --no-http --no-openssl
  
     o-saft.pl --legacy=quick --no-header --trace-key --showhost +check some.tld other.tld
+
* Identify timeout problems
 +
                                     
 +
     o-saft.pl +info some.tld --trace-cmd
  
*  Just for curiosity
+
this will show lines containing:
  
    o-saft.pl some.tld +fingerprint --format=raw
+
    #O-Saft  CMD: test ...
    o-saft.pl some.tld +certificate --format=raw | openssl x509 -noout -fingerprint
 
  
===== Specials for hunting problems with connections etc.=====
+
====DOCUMENTATION====
  
*  Show command line argument processing
+
=====User Documentation=====
  
    o-saft.pl +info some.tld --trace-arg
+
:Documentation is mainly intented for the user, which is provided with
  
*  Simple tracing
+
  o-saft.pl --help
  
    o-saft.pl +cn  some.tld --trace
+
:But it may be difficult to find the proper information there. To get
    o-saft.pl +info some.tld --trace
+
:more selective documentations, the  ''--help=*''  options can be used. To
 +
:get an overview which  ''--help=*''  options are available, use:
  
*  A bit more tracing
+
  o-saft.pl --help=HELP
  
    o-saft.pl +cn  some.tld --trace --trace
+
:This only provides the complete user documentation, or the well known
 +
:parts specified by the keyword, (HELP in example above). To find any
 +
:text with some lines of context, following could be used:
  
*  Show internal variable names in output
+
  o-saft.pl --help | egrep -i -C 3 "some text"
  
    o-saft.pl +info some.tld --trace-key
+
:This is simply avaiable with:
  
* Show internal argument processeing
+
  o-saft -help="some text"
  
    o-saft.pl +info --trace-arg some.tld
+
:In the GUI a more sophisticate search is implemented, see the  "Help"
 +
:window there:
  
* Show internal control flow and timing
+
  o-saft.tcl
  
    o-saft.pl +info some.tld --trace-time
+
=====Developer Documentation=====
  
*  List checked ciphers
+
:Documentation for developers is provided in various ways. Information
 +
:for developers can be found found in:
  
    o-saft.pl +cipher some.tld --v --v
+
:* the files itself
 
 
* List checked ciphers one per line
 
 
 
    o-saft.pl +cipher some.tld --v --v -v
 
 
 
*  Show processing of ciphers
 
 
 
    o-saft.pl +cipher some.tld --v --v --v -v
 
 
 
*  Show values retrieved from target certificate directly
 
  
    o-saft.pl +info some.tld --no-cert --no-cert --no-cert-text=Value-from-Certificate
+
:* with: <code>o-saft.pl --help=HELP</code>
 
 
Show certificate CA verifications
 
 
 
    o-saft.pl some.tld +chain_verify +verify +error_verify +chain
 
 
 
*  Avoid most performance and timeout problems (don't use  --v)
 
  
    o-saft.pl +info some.tld --no-cert --no-dns --no-http --no-openssl --no-sni
+
:* using:  <code>make</code>
  
 
==== ATTRIBUTION====
 
==== ATTRIBUTION====
Line 3,337: Line 4,447:
 
==== VERSION====
 
==== VERSION====
  
:@(#) 15.12.15
+
:@(#) 19.09.19
 
----
 
----
 
<small>
 
<small>

Latest revision as of 19:42, 29 December 2019

O-Saft

This is O-Saft's documentation as you get with:

o-saft.pl --help

On Windows following must be used

o-saft.pl --help --v


NAME

o-saft.pl - OWASP SSL advanced forensic tool
OWASP SSL audit for testers

DESCRIPTION

This tools lists information about remote target's SSL certificate
and tests the remote target according given list of ciphers.
Note: Throughout this description $0 is used as an alias for the
program name o-saft.pl .

SYNOPSIS

 o-saft.pl [COMMANDS ..] [OPTIONS ..] target [target target ...]
Where [COMMANDS] and [OPTIONS] are described below and target
is a hostname either as full qualified domain name or as IP address.
Multiple commands and targets may be combined.
All commands and options can also be specified in a rc-file, see
RC-FILE below.
I.g. all commands start with a + character and options start with
- or -- characters. Anything else is treated as target name.

QUICKSTART

Before going into a detailed description of the purpose and usage,
here are some examples of the most common use cases:
  • Show supported (enabled) ciphers of target:
   o-saft.pl +cipher --enabled example.tld
  • Show supported (enabled) ciphers with their DH parameters:
   o-saft.pl +cipher-dh example.tld
  • Test all ciphers, even if not supported by local SSL implementation:
   o-saft.pl +cipherall example.tld
  • Show details of certificate and connection of target:
   o-saft.pl +info example.tld
  • Check certificate, ciphers and SSL connection of target:
   o-saft.pl +check example.tld
  • Check connection to target for vulnerabilities:
   o-saft.pl +vulns example.tld
  • Check for all known ciphers (independant of SSL library):
   o-saft.pl example.tld --range=full
   checkAllCiphers.pl example.tld
   checkAllCiphers.pl example.tld --range=full --v
  • Get the certificate's Common Name for a bunch of servers:
   o-saft.pl +cn example.tld some.tld other.tld
  • List more usage examples
   o-saft.pl --help=examples
  • List all available commands:
   o-saft.pl --help=commands
  • Get table of contents for complete help
   o-saft.pl --help=toc
  • Show just one section, for example SECURITY, from help
   o-saft.pl --help=SECURITY
  • Show all --help=* commands
   o-saft.pl --help=HELP
  • Search for text in O-Saft's help and show with context
   o-saft -help=your-text
  • Start the simple GUI
   o-saft.tcl
  • Start the simple GUI which uses o-saft.pl in a Docker image
   o-saft.tcl --docker
For more specialised test cases, refer to the COMMANDS and OPTIONS
sections below. For more examples please refer to EXAMPLES section.
For more details, please see INSTALLATION below.

WHY?

Why a new tool for checking SSL security and configuration when there
are already a dozen or more such good tools in existence (in 2012)?
Unique features:
  • working in closed environments, i.e. without internet connection
  • checking availability of ciphers independent of installed library
  • checking for all possible ciphers (up to 65535 per SSL protocol)
  • mainly same results on all platforms.
Currently available tools suffer from some or all of following issues:
  • lack of tests of unusual SSL certificate configurations
  • may return different results for the same checks on a given target
  • missing tests for modern SSL/TLS functionality
  • missing tests for specific, known SSL/TLS vulnerabilities
  • no support for newer, advanced, features e.g. CRL, OCSP, EV
  • limited capability to create your own customised tests
Other reasons or problems are that other tools are either binary or
use additional binaries and hence not portable to other platforms.
In contrast to (all?) most other tools, including openssl, it can be
used to `ask simple questions' like `does target support STS' just by
calling:
   o-saft.pl +hsts_sts example.tld
For more, please see EXAMPLES section below.
If it should run on systems with old software (perl or Perl modules),
please see DEBUG section below.

SECURITY

This tool is designed to be used by people doing security or forensic
analyses. Hence no malicious input is expected.
There are no special security checks implemented. Some parameters are
roughly sanatised according unwanted characters. In particular there
are no checks according any kind of code injection.
Care should be taken, when additional tools and modules are installed
as described in INSTALLATION below. In particular it is recommended
to do these installations into directoies specially prepared for use
with o-saft.pl . No other tools of your system should use these installations
i.e. by accident or because your environment variables point to them.
Note that compilation and installation of additional tools (openssl,
Net::SSLeay, etc.) uses known insecure configurations and features!
This is essential to make o-saft.pl able to check for such insecurities.
It is highly recommended to do these installations and use the tools
on a separate testing system.
DO NOT USE THESE INSTALLATIONS ON PRODUCTIVE SYTEMS.

CONCEPTS

The purpose of O-Saft is to do the work, not to force the user to
learn a new tool or to install "newer" software first.
However, the user "should do something" if necessary depending on the
reported results.
Results
Results of checks are marked yes or no. This leaves the proper
interpretation, if the result is "good" or "bad", to the user.
Background: it is not always possible to rate a result as "good" or
"bad" or "insecure" or whatever. That's why O-Saft can not give the
"the best" or a "proper" recommendation. In practice it depends on
the context what a recommendation or countermeasure should be. That's
why results are marked yes or no if considered "questionable"
or "not good" (for example according other checks).
... more comming soon ...

TECHNICAL INFORMATION

It is important to understand, which provided information is based on
data returned by underlaying (used) libraries and the information
computed directly.
Version 19.11.19 and later
Starting with version 19.11.19 the +cipher command does not use any
external library. Checking for ciphers is done using plain Perl code.
Only other collected SSL/TLS related information requires an external
library, in general libssl.
The description about OpenSSL and libssl below applies only if any of
to the options --ciphermode=openssl or --siphermode=ssleay are given
with the +cipher command.
Therefore following commands and options changed:
  • +cipher uses internal method
  • +cipherall command obsolete, automatically changed to +cipher
  • +cipherraw command obsolete, automatically chnaged to +cipher
  • --openssl-ciphers --force-openssl changed to --ciphermode=openssl
  • --openssl=TOOL TOOL only used for +cipher --ciphermode=openssl
  • --legacy=owasp option obsolete
The commands +cipherall and +cipherraw are "converted" to the new
syntax, as follows:
 VERSION < 19.11.19           VERSION > 19.11.19
 ----------------------------+-------------------------------
 +cipher                      +cipher --ciphermode=ssleay
 +cipher --force-openssl      +cipher --ciphermode=openssl
 +cipherall                   +cipher
 +cipherraw                   +cipher --ciphermode=intern
 ----------------------------+-------------------------------
Version < 19.11.19
Up to version 19.11.19 the default behaviour for the +cipher command
was to use libssl. The commands +cipherall and +cipherraw did not
use any other library as described below.
OpenSSL, libssl, libcrypto
In general the tool uses Perl's Net::SSLeay(3pm) module which itself
is based on libssl and/or libssleay library of the operating system.
It's possible to use other versions of these libraries, see options:
  • --exe-path=PATH --exe=PATH
  • --lib-path=PATH --lib=PATH
  • --envlibvar=NAME
The external openssl(1) is called to extract some information from
its output. The version of openssl can be controlled with following
options:
  • --openssl=TOOL
  • --no-openssl
  • --openssl-ciphers --force-openssl
  • --exe-path=PATH --exe=PATH
  • --openssl-cnf=PATH
  • --openssl-s_client --s_client
OpenSSL is recommended to be used for libssl and libcrypto. Versions
0.9.8k to 1.0.2e (Jan. 2016) are known to work. However, versions be-
for 1.0.0 may not provide all informations.
Some functionality (checks) of O-Saft may be missing or fail, when
openssl versions 1.1.x are used (because functionality was removed).
LibreSSL is not recommended, because some functionallity considered
insecure, has been removed.
For more details, please see INSTALLATION below.
Certificates and CA
All checks according the validity of the certificate chain are based
on the root CAs installed on the system. Note that Net::SSLeay(3pm)
and openssl(1) may have their own rules how and where to find the
root CAs. Please refer to the documentation on your system for these
tools. However, there are folloing options to tweak these rules:
  • --ca-file=FILE
  • --ca-path=DIR
  • --ca-depth=INT
Commands and options
All arguments starting with + are considered COMMANDS for this
tool. All arguments starting with -- are considered OPTIONS for
this tool.
Reading any data from STDIN or here-documents is not yet supported.
It's reserved for future use.
Environment variables
Following environment variables are incorporated:
  • OPENSSL - if set, full path to openssl executable
  • OPENSSL_CONF - if set, full path to openssl's openssl.cnf or
directory where to find openssl.cnf
  • LD_LIBRARY_PATH - used and extended with definitions from options
Requirements
For checking all ciphers and all protocols with +cipherall command,
just perl (5.x) without any modules is required.
For +info and +check (and all related) commands, perl (5.x) with
following modules (minimal version) is required:
  • IO 1.25 (2011)
  • IO::Socket:INET 1.37 (2011)
  • IO::Socket:SSL 1.90 (2013)
  • Net::DNS 0.66 (2011)
  • Net::SSLeay 1.49 (2012)
However, it is recommended to use the most recent version of the mod-
ules which then gives more accurate results and less warnings. If the
modules are missing, they can be installed i.e. with:
  cpan Net::SSLeay
Note: if you want to use advanced features of openssl or Net::SSLeay,
please see INSTALLATION section how to compile and install the tools
fully customized.
Also an openssl executable should be available, but is not mandatory.
For checking DH parameters of ciphers, openssl 1.0.2 or newer should
be available. If an older version of openssl is found, we try hard to
extract the DH parameters from the data returned by the server, see
+cipher-dh command.
If you need to run on systems with older perl or Perl module versions
please refer to the DEBUG section for more information.

RESULTS

All output is designed to be easily parsed by postprocessors. Please
see OUTPUT section below for details.
For the results, we have to distinguish those returned by +cipher
command and those from all other tests and checks like +check or
+info command.
+cipher
The cipher checks will return one line for each tested cipher. It
contains at least the cipher name, yes or no whether it's
supported or not, and a security qualification. It may look like:
   AES256-SHA       yes    HIGH
   NULL-SHA         no     weak
Depending on the used --legacy=* option the format may differ
and also contain more information. For details see --legacy=*
option below.
The text for security qualifications are mainly those returned by
openssl (version 1.0.1): LOW, MEDIUM, HIGH and WEAK.
The same texts but with all lower case characters are used if the
qualification was adapted herein. Following rules for adjusting the
qualification were used:
  • weak:
    • all *NULL* ciphers
    • all *RC4* ciphers
    • all *EXPORT* ciphers
    • all *anon* (aka ADH aka DHA) ciphers
    • all *CBC* and *CBC3* (aka 3DES) ciphers
  • low:
  • high:
    • all *AES(128|256)* ciphers
    • all *CAMELLIA* ciphers
+check
These tests return a line with a label describing the test and a
test result for it. The idea is to report yes if the result
is considered "secure" and report the reason why it is considered
insecure otherwise. Example of a check considered secure:
       Label of the performed check:           yes
Example of a check considered insecure:
       Label of the performed check:           no (reason why)
Note that there are tests where the results appear confusing when
first viewed, like for www.wi.ld:
       Certificate is valid according given hostname:  no (*.wi.ld)
       Certificate's wildcard does not match hostname: yes
This can for example occur with:
       Certificate Common Name:                *.wi.ld
       Certificate Subject's Alternate Names:  DNS:www.wi.ld
Please check the result with the +info command also to verify
if the check sounds reasonable.
+info
The test result contains detailed information. The labels there
are mainly the same as for the "+check" command.

COMMANDS

There are commands for various tests according the SSL connection to
the target, the targets certificate and the used ciphers.
All commands are preceded by a + to easily distinguish from other
arguments and options. However, some --OPT options are treated as
commands for historical reason or compatibility to other programs.
The most important commands are (in alphabetical order):
+check +cipher +info +http +list +quick +sni +sni_check +version
A list of all available commands will be printed with
   o-saft.pl --help=cmds
The description of all other commands will be printed with
   o-saft.pl --header --help=commands
The summary and internal commands return requested information or the
results of checks. These are described below.
Note that some commands may be a combination of other commands, see:
   o-saft.pl --header --help=intern
The following sub-sections only describe the commands, which do more
than giving a simple information from the target. All other commands
can be listed with:
   $0 --header --help=commands
The final sub-sections Notes about commands describes some notes
about special commands and related commands.
Commands for information about this tool
All these commands will exit after execution (cannot be used together
with other commands).
+ciphers
Show ciphers offered by local SSL implementation.
This commands prints the ciphers in format like openssl ciphers
does. It also accepts the -v and -V option. The --legacy=TYPE
option can be used as described for +list command.
Use +list command for more information according ciphers.
+list
Show all ciphers known by this tool. This includes cryptogrphic
details of the cipher and some internal details about the rating.
In contrast to +ciphers command +list uses TAB characters
instead of spaces to seperate columns. It also prints table header
lines by default.
Different output formats are used for the --legacy option:
  • --legacy=simple - tabular output of cipher values
  • --legacy=full - as --legacy=simple but more data
  • --legacy=openssl - output like with +cipher command
  • --legacy=ssltest - output like ssltest --list
+VERSION
Just show version and exit.
+version
Show version information for both the program and the Perl modules
that it uses, then exit.
Use --v option to show more details.
+libversion
Show version of openssl.
+quit
Show internal data and exit, used for testing and debugging only.
Please see TESTING below.
Commands to check SSL details
Following (summary, internal) commands are simply a shortcut for
a list of other commands. For details of the list use:
   o-saft.pl --help=intern
+check
Check the SSL connection for security issues. Implies +cipher .
+host +target
Print details about the targets hostname, DNS, etc.
These details are usually printed only for the +check and +info
command, but not for any individual command.
+http
Perform HTTP checks (like STS, redirects etc.).
+info
Overview of most important details of the SSL connection.
Use --v option to show details also, which span multiple lines.
+info--v
Overview of all details of the SSL connection. This is a shortcut
for all commands listed below but not including +cipher.
This command is intended for debugging as it prints some details
from the used Net::SSLinfo module.
+quick
Quick overview of checks. Implies --enabled and --label=short.
+pfs
Check if servers offers ciphers with prefect forward secrecy (PFS)
+protocols
Check for protocols supported by target.
+vulns
Check for various vulnerabilities.
+sts +hsts
Various checks according STS HTTP header.
This option implies --http, means that --no-http is ignored.
+sni
Check for Server Name Indication (SNI) usage.
+sni_check +check_sni
Check for Server Name Indication (SNI) usage and validity of all
names (CN, subjectAltName, FQDN, etc.).
+bsi
Various checks according BSI TR-02102-2 and TR-03116-4 compliance.
+ev
Various checks according certificate's extended Validation (EV).
Hint: use option --v --v to get information about failed checks.
+sizes
Check length, size and count of some values in the certificate.
+s_client
Dump data retrieved from openssl s_client ... call. Should be
used for debugging only.
It can be used just like openssl itself, for example:
        openssl s_client -connect host:443 -no_sslv2
+dump
Dumps internal data for SSL connection and target certificate.
This is mainly for debugging and should not be used together with
other commands (except +cipher).
Each key-value pair is enclosed in #{ and #} .
Using --trace --trace dumps data of Net::SSLinfo too.
+exec
Command used internally when requested to use other libraries.
This command should not be used directly.
Commands to test ciphers provided by target
Beside the description of the commands itself here, please see also
#Notes about commands below.
+cipher
Check target for ciphers, either all ciphers or ciphers specified
with --cipher=* option.
Note that ciphers not supported by the local SSL implementation
are not checked by default, use +cipherall or +cipherraw command for that.
Use --v option to see all ciphers being checked.
+cipherraw
Check target for all possible ciphers.
Does not depend on local SSL implementation.
In contrast to +cipher this command has some options to tweak
the cipher tests, connection results, and some strange behaviours
of the target. See #Options for cipherall and cipherraw command for details.


+cipherall
Same as +cipherraw but ouput format similat to +cipher command.
+cipher-default
Lists the cipher selected by the server for each protocol sometimes
referred to as "default cipher".
For each protocol the two selected ciphers are shown, one returned
by the server if the cipher list in the ClientHello is sorted with
the strongest cipher first, and one returned if the cipher list in
the ClientHello is sorted with strongest cipher last.
See #Notes about commands for details.
+cipher-dh
Checked target for ciphers. All ciphers supported by the server are
printed with their DH or ECDH paramaters (if available).
ciphers.
+cipher-null +null
Check if target accepts NULL ciphers.
+cipher-adh +adh
Check if target accepts ciphers with anonymous key exchange.
+cipher-exp +export
Check if target accepts EXPORT ciphers.
+cipher-cbc +cbc
Check if target accepts CBC ciphers.
+cipher-des +des
Check if target accepts DES ciphers.
+cipher-rc4
Check if target accepts RC4 ciphers.
+cipher-edh +edh
Check if target supports ephemeral ciphers.
+cipher-pfs
Check if target supports ciphers with PFS.
+cipher-strong
Check if target selects strongest cipher.
+cipher-weak
Check if target selects weak cipher (oposite of +cipher-strong).
Discrete commands to test SSL connection and certificate details
Discrete commands, please see:
   o-saft.pl --help=commands
Notes about commands
+cipher vs. +cipherall
+cipher can only check for ciphers - more precise: cipher suites -
provided by the local SSL implementation (i.e. libssl).
+cipherall can check for any cipher, as it just uses the cipher's
integer value in the range 0 .. 65532.
+cipherall vs. +cipherraw
These commands are identical, just the output format is different.
+cipher vs. +cipher-default
Both commands show the default cipher foreach protocol.
+cipher lists a summary of ciphers selected by the server for each
protocol requested by the user (for example by using options like:
--sslv3 --tlsv1 etc.). When the --v option is used, all selected
ciphers for all known protocols are listed. This summary focuses on
counts for various ciphers.
+cipher-default lists the selected cipher by the server for each
protocol.
+cipher-selected vs. +cipher-default
+cipher-selected lists the cipher selected by the server if no particular
protocol was specified and the system's default cipher list is send
in the ClientHello to the server.
+cipher-default lists the selected cipher by the server for each
protocol.
+cipher-strong vs. +cipher-default
+cipher-strong shows the result of the check if strong ciphers are
preferred by the server. It is a check command.
+cipher-default lists the cipher selected by the server for each
protocol. It is a information command.
It is not possible to check if a server uses 'SSLHonorCipherOrder'.
Even if it is used (switched on), it is not possible to check the
specified order of the ciphers.
I. g. it is expected that the order is according the cipher suite's
strength, meaning the most strongest first, and the weakest last.
It does not make sense to use an order where a weak cipher preceeds
a stronger one. Such a (mis-)configuration should be detected.
Having this in mind, the algorithm to detect a proper cipher order
is as simply as follows:
   1. pass sorted cipher list with strongest cipher first
   2. pass sorted cipher list with strongest cipher last
if the server returns the same cipher for both checks, it's assumed
that it prefers to use the most strongest cipher. In this case it's
obvious that 'SSLHonorCipherOrder' is set (exceptions see below).
+cipherall uses a more accurate algorithm to detect the server's
cipher order.
Exceptions:
If either, the server or the client, uses only one cipher suite in
the list, SSLHonorCipherOrder cannot be detected at all.
The same happens, if only one cipher in the client's list matches a
cipher in the server's list.
+extensions vs. +tlsextensions
+extensions shows the "Certificate extensions" and +tlsextensions
will show the TLS protocol extensions.
Use +tlsextdebug to show more informations about the TLS protocol
extensions.
+http2 +spdy +spdy3 +spdy31 +spdy4 +prots
These commands are just an alias for the +protocols command.
+hostname vs. +wildhost vs. +altname vs. +rfc_2818
The commands +cn and +altname print the information stored in
the certificate.
The command +hostname checks if the given hostname matches the CN
value in the certificate. Note that wildcard names in the CN, only
allow to contain one '*'.
The command +wildcard checks if the given hostname does not match
any name specified in the certificate's "subjectAltname". This check
is useful if the certificate and the configuration must comply to
RFC 6125 or EV certificates.

OPTIONS

All options are written in lowercase. Words written in all capital in
the description here is text provided by the user.
Options for help and documentation
--h
--help
WYSIWYG
--help=help
Show available options to show descriptions (this Options section).
--help=cmds
Show available commands.
--help=commands
Show available commands with short description.
--help=opt
Show available options; short form.
--help=options
Show available options with their description.
--help=checks
Show available checks.
--help=tools
Description of tools around O-Saft, when, where and how to use.
--help=cmd
Show additional and user specified commands.
--help=cfg-cmd
Show additional and user specified commands. Output can be used in
RC-FILE or as option.
--help=check-cfg --help=cfg-check
Show texts used as labels in output for checks (see +check) ready
for use in RC-FILE or as option.
--help=data
Show available informations.
--help=data-cfg --help=cfg-data --help=cfg-info
Show texts used as labels in output for data (see +info) ready
for use in RC-FILE or as option.
--help=hint
Show texts used in hint messages.
--help=hint-cfg --help=cfg-hint
Show texts used in hint messages ready for use in RC-FILE or as
option.
--help=text
Show texts used in various messages.
--help=text-cfg --help=cfg-text
Show texts used in various messages ready for use in RC-FILE or
as option.
--help=legacy
Show possible legacy formats (used as value in --legacy=KEY).
--help=compliance
Show available compliance checks.
--help=intern
Show internal commands.
--help=range
Show list of cipherranges (see #--cipherrange=RANGE--cipherrange=RANGE).
--help=alias
Show alias for commands and options.
--help=pattern
Show list of cipher pattern (used for --cipher=CIPHER).
--help=score
Show score value for each check.
Value is printed in format to be used for --cfg_score=KEY=SCORE.
Note that the sequence of options is important. Use the options
--trace and/or --cfg_score=KEY=SCORE before --help=score.
--help=toc --help=content
Show headlines from help textsUseful to get an overview.
--help=SECTION
Show SECTION from documentation, see --help=toc for a list.
Example:
     o-saft.pl --help=EXAMPLES
--help=regex
Show regular expressions used internally.
--help=gen-html
Show help text in HTML format.
--help=gen-pod
Show help text in POD format.
--help=gen-wiki
Show help text in mediawiki format.
--help=gen-cgi
Generate HTML page with o-saft.cgi as form action..
--help=error --help=warning --help=problem
Show KNOWN PROBLEMS section with description of known error and
warning messages.
--help=FAQ
Show KNOWN PROBLEMS and LIMITATIONS section.
--help=glossar
Show common abbreviation used in the world of security.
--help=links
Show list of URLs related to SSL/TLS.
--help=rfc
Show list of RFC related to SSL/TLS.
--help=todo
Show known problems and bugs.
--help=exit
Show possible --exit=KEY options. Used for debugging only.
--help=program.code
For developers.
Options for all commands (general)
--dns
Do DNS lookups to map given hostname to IP, do a reverse lookup.
--no-dns
Do not make DNS lookups.
Note that the corresponding IP and reverse hostname may be missing
in some messages then.
--host=HOST
Specify HOST as target to be checked. Legacy option.
--port=PORT
Specify target's PORT to be used. Legacy option.
--host=HOST --port=PORT HOST:PORT HOST
When giving more than one HOST argument, the sequence of the given
HOST argument and the given --port=PORT and the given --host=HOST
options are important.
The rule how ports and hosts are mapped is as follows:
* HOST:PORT arguments are used as is (connection to HOST on PORT)
* only HOST is given, then previous specified --port=PORT is used
Note that URLs are treated as HOST:PORT, if they contain a port.
Example:
   o-saft.pl +cmd host-1 --port 23 host-2 host-3:42 host-4
will connect to:
      host-1:443
      host-2:23
      host-3:42
      host-4:23
--proxyhost=PROXYHOST --proxy=PROXYHOST:PROXYPORT
Make all connection to target using PROXYHOST.
Also possible is: --proxy=PROXYUSER:PROXYPASS@PROXYHOST:PROXYPORT
--proxyport=PROXYPORT
Make all connection to target using PROXYHOST:PROXYPORT.
--proxyuser=PROXYUSER
Specify username for proxy authentication.
--proxypass=PROXYPASS
Specify password for proxy authentication.
--proxy=PROXYUSER:PROXYPASS@PROXYHOST:PROXYPORT is also possible.
--starttls
Use STARTTLS command to start a TLS connection via SMTP.
This option is a shortcut for --starttls=SMTP
--starttls=PROT
Use STARTTLS command to start a TLS connection via protocol.
PROT may be any of: SMTP, IMAP, IMAP2, POP3, FTPS, LDAP, RDP, XMPP
For --starttls=SMTP see --dns-mx also to use MX records instead
of host
--starttls-delay=SEC
Number of seconds to wait before sending a packet, to slow down the
STARTTLS requests. Default is 0.
This may prevent blocking of requests by the target due to too much
or too fast connections.
Note: In this case there is an automatic suspension and retry with
a longer delay.
--cgi, --cgi-exec
Internal use for CGI mode only.
Options for SSL tool
--no-rc
Do not read RC-FILE .
--rc
Read RC-FILE if exists, from directory where program was found.
--rc=path/to/FILE
Read RC-FILE path/to/FILE if exists.
--exitcode
The exit status code will be greater 0, if any of following applies:
  • any check returns no, except if no (<<...>>)
  • insecure protocols are available
  • insecure ciphers are supported
  • ciphers without PFS are supported
In particular, the status code will be the total count of all these
checks. The status code will also be printed at end, like:
   # EXIT 23
Parts of these checks can be diasabled, see --exitcode-* options
below.
Use --v or --exitcode-v to see details about the performed checks.
Functionality implemented experimental, may change in future.
--exitcode-v
Print information about performed checks.
--exitcode-quiet
Do not print status code at end like # EXIT 23.
--exitcode-no-checks
Do not count checks with result 'no' for --exitcode .
--exitcode-no-low --exitcode-no-weak --exitcode-no-medium
Do not count LOW, WEAK or MEDIUM security ciphers for --exitcode .
--exitcode-no-ciphers
Do not count any ciphers for --exitcode .
--exitcode-no-pfs
Do not count ciphers without PFS for --exitcode .
--openssl-s_client --s_client
Use openssl s_slient ... call to retrieve more informations from
the SSL connection. This is disabled by default on Windows because
of performance problems. Without this option (default on Windows !)
following informations are missing:
      compression, expansion, renegotiation, resumption,
      selfsigned, verify, chain, protocols, DH parameters
See Net::SSLinfo for details.
If used together with --trace, s_client data will also be printed
in debug output of Net::SSLinfo.
--no-openssl
Do not use external openssl tool to retrieve informations. Use of
openssl is disabled by default on Windows.
Note that this results in some missing informations, see above.
--openssl=TOOL
TOOL can be a path to openssl executable; default: openssl
--openssl-cnf=FILE --openssl-conf=FILE
FILE path of directory or full path of openssl.cnf
If set, environment variable OPENSSL_CONF will be set to given path
(or file) when openssl(1) is started. Please see openssl's man page
for details about specifying alternate openssl.cnf files.
--openssl-ciphers --force-openssl
Use openssl to check for supported ciphers; default: IO::Socket
This option forces to use openssl s_slient -connect CIPHER .. to
check if a cipher is supported by the remote target. This is useful
if the --lib=PATH option doesn't work (for example due to changes
of the API or other incompatibilities).
--exe-path=PATH --exe=PATH
PATH is a full path where to find openssl.
--lib-path=PATH --lib=PATH
PATH is a full path where to find libssl.so and libcrypto.so
See HACKER's INFO below for a detailed description how it works.
--envlibvar=NAME
NAME is the name of a environment variable containing additional
paths for searching dynamic shared libraries.
Default is LD_LIBRARY_PATH .
Check your system for the proper name, i.e.:
DYLD_LIBRARY_PATH, LIBPATH, RPATH, SHLIB_PATH .
--ssl-error
The connection to a target may fail, or even block, due to various
reasons, for example lost network at all, blocking at firewall, etc.
In particular when checking ciphers with +cipher , this may result
in long delays until results are printed.
Using this option stops trying to do more connections to the target
when --ssl-error-max=CNT consecutive errors occoured, or if the total
amount of errors increases --ssl-error-total=CNT.
--ssl-error-max=CNT
Max. amount of consecutive errors (default: 5).
--ssl-error-timeout=SEC
Timeout in seconds when a failed connection is treated as error and
then counted (default: 1).
--ssl-error-total=CNT
Max. total amount of errors (default: 10).
--ssl-lazy
I.g. this tools tries to identify available functionality according
SSL versions from the underlaying libraries. Unsupported versions
are then disables and a warning is shown.
Unfortunately some libraries have not implemented all functions to
check availability of a specific SSL version, which then results in
a compile error.
This option disables the strict check of availability.
If the underlaying library doesn't support the required SSL version
at all, following error may occour:
      Can't locate auto/Net/SSLeay/CTX_v2_new.al in @INC ...
--timeout=SEC
Timeout in seconds when connecting to the target (default: 2).
-v
Print list of ciphers in style like: openssl ciphers -v.
Option used with +ciphers command only.
-V
Print list of ciphers in style like: openssl ciphers -V.
Option used with +ciphers command only.
Options for SSL connection to target
--ciphermode=MODE

Following MODEs are supported:

  • intern scan for ciphers using internal method; (default)
  • openssl scan for ciphers using external openssl executable
  • ssleay scan for ciphers using IO::Socket and Net::SSLeay
  • dump same as intern but print all cipher informations,
useful when postprocessed by contrib/* tools
--cipher=CIPHER

CIPHER can be any string accepted by openssl or following:

  • yeast use all ciphers from list defined herein, see +list
Beside the cipher names accepted by openssl, CIPHER can be the name
of the constant or the (hex) value as defined in openssl's files.
Currently supported are the names and constants of openssl 1.0.1k .
Example:
  • --cipher=DHE_DSS_WITH_RC4_128_SHA
  • --cipher=0x03000066
  • --cipher=66
will be mapped to DHE-DSS-RC4-SHA
Note: if more than one cipher matches, just one will be selected.
Default is ALL:NULL:eNULL:aNULL:LOW as specified in Net::SSLinfo
--socket-reuse
TCP socket will be reused for next connection attempt even if SSL
connection failed.
--no-socket-reuse
Close TCP socket and then reopen for next connection attempt if SSL
connection failed.
This is useful for some servers which may return an "TLS alert" if
the connection fails and then fail again on the same socket.
--ignore-no-connect
A simple check if the target can be connected will be performed by
default. If this check fails, the target will be ignored, means no
more reuqested checks will be done. As this connection check some-
times fails due to various reasons, the check can be disabled using
this option.
--no-md5-cipher
Do not use *-MD5 ciphers for other protocols than SSLv2.
This option is only effective with +cipher command.
The purpose is to avoid warnings from IO::Socket::SSL(3pm) like:
        Use of uninitialized value in subroutine entry at lib/IO/Socket/SSL.pm line 430.
which occours with some versions of IO::Socket::SSL(3pm) when a
  • -MD5 ciphers will be used with other protocols than SSLv2.
Note that these ciphers will be checked for SSLv2 only.
--SSL, -protocol SSL
--no-SSL
  • SSL can be any of:
ssl, ssl2, ssl3, sslv2, sslv3, tls1,
tls1, tls11, tls1.1, tls1-1, tlsv1, tlsv11, tlsv1.1, tlsv1-1
(and similar variants for tlsv1.2).
For example --tls1 --tlsv1 --tlsv1_1 are all the same.
(--SSL variants): Test ciphers for this SSL/TLS version.
(--no-SSL variants): Don't test ciphers for this SSL/TLS version.
--no-tcp
Shortcut for:
--no-sslv2 --no-sslv3 --no-tlsv1 --no-tlsv11 --no-tlsv12 --no-tlsv13
--tcp
Shortcut for: --sslv2 --sslv3 --tlsv1 --tlsv11 --tlsv12 --tlsv13
--no-udp
Shortcut for:
--no-dtlsv09 --no-dtlsv1 --no-dtlsv11 --no-dtlsv12 --no-dtlsv13
--udp
Shortcut for: --dtlsv09 --dtlsv1 --dtlsv11 --dtlsv12 --dtlsv13
--nullsslv2
This option forces to assume that SSLv2 is enabled even if the
target does not accept any ciphers.
The target server may accept connections with SSLv2 but not allow
any cipher. Some checks verify if SSLv2 is enabled at all, which
then would result in a failed test.
The default behaviour is to assume that SSLv2 is not enabled if no
ciphers are accepted.
--http
Make a HTTP request if cipher is supported.
If used twice debugging will be enabled using environment variable
HTTPS_DEBUG .
--no-http
Do not make HTTP request.
--sni
Make SSL connection in SNI mode.
--no-sni
Do not make SSL connection in SNI mode (default: SNI mode).
--sni-toggle --toggle-sni
Test with and witout SNI mode (+cipherall only).
--force-sni
Do not check if SNI seems to be supported by Net::SSLeay(3pm).
Older versions of openssl and its libries do not support SNI or the
SNI support is implemented buggy. By default it's checked if SNI is
properly supported. With this option this check can be disabled.
Be warned that this may result in improper results.
--servername=NAME
--sni-name=NAME
If in SNI mode is active, see --sni above, NAME is used instead of
hostname for connections to the target. If SNI mode is not active,
see --no-sni above, NAME is not used. The default is undefined,
which forces to use the given FQDN.
This is useful, for example when an IP instead of a FQDN was given,
where a correct hostname (i.g. a FQDN) needs to be specified.
Note: i.g. there is no need to use this option, as a correct value
for the SNI name will be choosen automatically (except for IPs).
However, it is kind of fuzzing ...even setting to an empty string
is possible.
Limitation: the same NAME is used for all targets, if more than
one target was specified.
--no-cert
Do not get data from target's certificate, return empty string.
--no-cert --no-cert
Do not get data from target's certificate, return default string
of Net::SSLinfo (see --no-cert-text TEXT option).
--no-cert-text=TEXT
Set TEXT to be returned from Net::SSLinfo.pm if no certificate
data is collected due to use of --no-cert.
--ca-depth=INT
Check certificate chain to depth INT (like openssl's -verify).
--ca-file=FILE
Use FILE with bundle of CAs to verify target's certificate chain.
--ca-path=DIR
Use DIR where to find CA certificates in PEM format.
--no-nextprotoneg
Do not use -nextprotoneg option for openssl.
--proto-alpn=NAME
Name of protocol to be added to list of applcation layer protocols
(ALPN), which is used for any connection to the targets.
See --cipher-alpn=NAME also.
--proto-npn=NAME
Name of protocol to be added to list of next protocol negotiations
(NPN), which is used for any connection to the targets.
See --cipher-npn=NAME also.
--ssl-compression --compression
Use SSL option "compression" for connection.
--no-ssl-compression --no-compression
Use SSL option "no compression" for connection (default: don't use)
--no-reconnect
Do not use -reconnect option for openssl.
--no-tlsextdebug
Do not use -tlsextdebug option for openssl.
--sclient-opt=VALUE
Argument or option passed to openssl s_client command.
Options for +cipher command
--cipher-alpn=NAME
Name of protocol to be added to list of applcation layer protocols
(ALPN), which is used for cipher checks.
  • --cipher-alpn=, sets empty list.
  • --cipher-alpn=,, sets list to empty element "".
--cipher-npn=NAME
Name of protocol to be added to list of next protocol negotiations
(NPN), which is used for cipher checks.
  • --cipher-lpn=, sets empty list.
  • --cipher-lpn=,, sets list to empty element "".
Note: setting empty list or element most likely does not work with
openssl executable (i.e. --force-openssl).
--cipher-curve=NAME
Name of ecliptic curve to be added to list of ecliptic curves (EC),
which is used for cipher checks.
  • --cipher-curve=, sets empty list.
  • --cipher-curve=,, sets list to empty element "".
Note: setting empty list or element most likely does not work with
openssl executable (i.e. --force-openssl).
Options for cipherall and cipherraw command
--range=RANGE
--cipherrange=RANGE
Specify range of cipher constants to be tested by +cipherall .
Following RANGEs are supported (see also --cipherrange=RANGE):
  • rfc all ciphers defined in various RFCs
  • shifted rfc, shifted by 64 bytes to the right
  • long like rfc but more lazy list of
  • huge all constants 0x03000000 .. 0x0300FFFF
  • safe all constants 0x03000000 .. 0x032FFFFF
  • full all constants 0x03000000 .. 0x0300FFFF
  • SSLv2 all ciphers according RFC for SSLv2
Note: SSLv2 is the internal list used for testing SSLv2 ciphers.
It does not make sense to use it for other protocols; however ...
--slow-server-delay=SEC
Additional delay in seconds after the server is connected using a
proxy or before starting STARTTLS.
This is useful when connecting via slow proxy chains or connecting
to slow servers before sending the STARTTLS sequence.
--ssl-maxciphers=CNT
Maximal number of ciphers sent in a sslhello (default: 32).
--ssl-double-reneg
Send SSL extension "reneg_info" even if list of ciphers includes
TLS_EMPTY_RENEGOTIATION_INFO_SCSV (default: do not include)
--ssl-nodata-nocipher
Do not abort testing for next cipher when the target responds with
"NoData" times out. Useful for TLS intolerant servers.
By default testing for ciphers is aborted when the target responds
with "noData message.
--ssl-use-ecc
Use supported elliptic curves. Default on.
--ssl-use-ec-point
Use TLS "ec_point_formats" extension. Default on.
--ssl-use-reneg
Test for ciphers with "secure renegotiation" flag set.
Default: don't set "secure renegotiation" flag.
--ssl-retry=CNT
Number of retries when connection timed-out (default: 2).
--ssl-timeout=SEC
Number of seconds to wait until connection is qualified as timeout.
--dns-mx, --mx
Get DNS MX records for given target and check the returned targets.
(only useful with --starttls=SMTP)
Options for checks and results
Options used for +check command:
--enabled
Only print result for ciphers accepted by target.
--disabled
Only print result for ciphers not accepted by target.
--ignorecase
Checks are done case insensitive.
--no-ignorecase
Checks are done case sensitive. Default: case insensitive.
Currently only checks according CN, alternate names in the target's
certificate compared to the given hostname are effected.
--ignore-no-reply
When checking for the TLS "heartbeat" extension, the server may not
respond at all, which would result in a "no reply" message. This
marks the check for +heartbleed as no.
I.g. a server is not vulnerable to the heartbleed attack if the
TLS "heartbeat" extension is disabled. Hence the check result no
may be mis-leading. This option treats the "no reply" result as
"not vulnerable" and returns yes then.
Note: if the server does not respond for this check, does not mean
that the "heartbeat" extension is switched off. If unsure, disable
this lazy check with --no-ignore-no-reply .
Options for output format
--label=TYPE
Defines the format of the descriptive text(label) for +check and
+info command.
Following TYPEs are supported:
--label=long
Prints full text for labels:
 Certificate Common Name:  some.tld
--label=short
Prints short less descriptive text for labels:
 Common Name:              some.tld
--label=key
Internal format: print name of key instead of text as label. Key is
Prints name of key instead of text as label. The key is that of the
internal data structure(s).
 [cn]                      some.tld
--legacy=TOOL
For compatibility with other tools, the output format used for the
result of the +cipher command can be adjusted to mimic the format
of other SSL testing tools.
The argument to the --legacy=TOOL option is the name of the tool
to be simulated.
Following TOOLs are supported:
  • sslaudit format of output similar to sslaudit
  • sslcipher format of output similar to ssl-cipher-check
  • ssldiagnos format of output similar to ssldiagnos
  • sslscan format of output similar to sslscan
  • ssltest format of output similar to ssltest
  • ssltestg format of output similar to ssltest -g
  • ssltest-g format of output similar to ssltest -g
  • sslyze format of output similar to sslyze
  • ssl-cipher-check same as sslcipher
  • ssl-cert-check format of output similar to ssl-cert-check
  • testsslserver format of output similar to TestSSLServer.jar
  • thcsslcHeck format of output similar to THCSSLCheck
Note that these legacy formats only apply to output of the checked
ciphers. Other texts like headers and footers are adapted slightly.
Please do not expect identical output as the TOOL when using these
options, it's a best guess and should be parsable in a very similar
way.
--legacy=TYPE
--legacy=compact
Internal format: mainly avoid tabs and spaces format is as follows:
Some Label:<-- anything right of colon is data
--legacy=full
Internal format: pretty print each label in its own line, followed
by data prepended by tab character (useful for +info only).
--legacy=owasp
Results for cipher checks use rating from OWASP Cipher Cheat Sheet.
--legacy=quick
Internal format: use tab as separator; ciphers are printed with bit
length (implies --tab).
--legacy=simple
Internal default format.
--format=FORM
This option is used to specify the format of the result lines. This
covers the value of the result line only.
  • raw Print raw data as passed from Net::SSLinfo .
Note: all data will be printed as is, without additional label
or formatting. It's recommended to use the option in conjunction
with exactly one command. Otherwise the user needs to know how
to "read" the printed data.
  • hex Convert some data to hex: 2 bytes separated by :.
  • 0x Convert some data with hex values:
2 bytes preceded by 0x and separated by a space.
  • /x Same as --format=\x
  • \x Convert some data with hex values:
2 bytes preceded by \x and no separating char.
--header
Print formatting header. Default for +check, +info, +quick.
and +cipher only.
--no-header
Do not print formatting header.
Useful if raw output should be passed to other programs.
Note: must be used on command line to inhibit all header lines.
--ignore-cmd=CMD
--ignore-output=CMD
--no-cmd=CMD
--no-output=CMD
Do not print output (data or check result) for command CMD.
CMD is any valid command, see COMMANDS, without leading +.
Option can be used multiple times.
--score
Print scoring results. Default for +check.
--no-score
Do not print scoring results.
--separator=CHAR
--sep=CHAR
CHAR will be used as separator between label and value of the
printed results. Default is :
--tab
TAB character (0x09, \t) will be used as separator between label
and value of the printed results.
As label and value are already separated by a TAB character, this
options is only useful in conjunction with the --legacy=compact
option.
--showhost
Prefix each printed line with the given hostname (target).
The hostname will be followed by the separator character.
--std-format=utf8
--std-format=crlf
--std-format=raw
--std-format=unix
--std-format=CHARSET
This option is used to specify the general output format for STDOUT
and STDERR. All results are written to STDOUT, errors and warnings
may also be written to STDERR . The default is :unix:utf8, which
is the perlish definition used internally.
Following values are supported:
  • raw
  • unix Print raw data, binary in bytes without conversion.
Note: binary here just means characters (as all output is text).
  • utf8 Convert all characters to UTF-8.
  • crlf Use CR LF as end of line.
  • CHARSET CHARSET can be any of the local installed character
sets, like UTF-8, UTF-16LE, CP1252, iso-8859-7, etc..
This conversion may print its own warnings.
The option can be used multiple times with different values.
To reset the default behaviour, either raw or unix must be
used. Obviously, they must be used first. All other values are used
additionally.
Note: utf8 just defines the format of the characters, it does no
further checks on the converted characters. In contrast, UTF-8 is
used as real encoding and does some checks.
For more details, please see "perldoc -f binmode" .
Currently (Jan. 2018), these options must be used before any --help
option.
--win-CR
Obsolete, please use --std-format=crlf .
Options for compatibility with other programs
Please see other programs for detailed description (if not obvious:).
Note that often only the long form options are accepted as most short
form options are ambiguous.
If other programs use the same option,but with a different behaviour,
then thes other options are not supported.
For a list of supported options, please see:
 o-saft.pl --help=alias
Following list contains only those options not shown with:
 o-saft.pl --help=alias
Tool's Option        (Tool)          o-saft.pl Option
--------------------+---------------+---------------------------
 --checks CMD        (TLS-Check.pl)  same as +CMD
 -h, -h=HOST         (various tools) same as --host HOST
 -p, -p=PORT         (various tools) same as --port PORT
 -t HOST             (ssldiagnos)    same as --host HOST
 --protocol SSL      (ssldiagnos)    same as --SSL
 --UDP               (ssldiagnos)    same as --udp
 --insecure          (cnark.pl)      ignored
 --nopct --nocolor   (ssldiagnos)    ignored
 --timeout, --grep   (ssltest.pl)    ignored
 -r,  -s,  -t,  -x   (ssltest.pl)    ignored
 -connect, -H, -u, -url, -U          ignored
 -noSSL                              same as --no-SSL
 -no_SSL                             same as --no-SSL
--------------------+---------------+---------------------------
For definition of SSL see --SSL and --no-SSL above.
Options for customization
For general descriptions please see CUSTOMIZATION section below.
--cfg_cmd=CMD=LIST
Redefine list of commands. Sets  %cfg{cmd-CMD} to LIST. Commands
can be written without the leading +.
If CMD is any of the known internal commands, it will be redifned.
If CMD is a unknown command, it will be created.
Example:
   --cfg_cmd=sni=sni hostname
To get a list of commands and their settings, use:
   o-saft.pl --help=intern
Main purpose is to reduce list of commands or to print them sorted.
An example +preload can be found in .o-saft.pl .
--cfg_score=KEY=SCORE
Redefine value for scoring. Sets  %checks{KEY}{score} to SCORE.
Most score values are set to 10 by default. Values 0 .. 100 are
allowed.
To get a list of current score settings, use:
   o-saft.pl --help=score
For deatils how scoring works, please see SCORING section.
Use the --trace-key option for the +info and/or +check
command to get the values for KEY.
--cfg_checks=KEY=TEXT --cfg_data=KEY=TEXT
Redefine texts used for labels in output. Sets  %data{KEY}{txt} or
 %checks{KEY}{txt} to TEXT.
To get a list of preconfigured labels, use:
   o-saft.pl --help=cfg_checks
   o-saft.pl --help=cfg_data
--cfg_text=CIPHER=value
Redefine the security value (i.e. HIGH) in the cipher description.
Example:
   o-saft.pl --cfg-cipher=NULL-MD5=no-security-at-all ...
--cfg_text=KEY=TEXT
Redefine general texts used in output. Sets  %text{KEY} to TEXT.
To get a list of preconfigured texts, use:
   o-saft.pl --help=cfg_text
Note that \n, \r and \t are replaced by the corresponding character
when read from RC-FILE.
--cfg_text=FILE
Read definitions for  %text{KEY}="my text" from file FILE.
--cfg_hint=KEY=TEXT
Redefine texts used for hints. Sets  %cfg{hints}{KEY} to TEXT.
To get a list of preconfigured texts, use:
   o-sat.pl --help=cfg-hint
--call=METHOD
See Options for SSL tool
--usr
Execute functions defined in o-saft-usr.pm.
--usr-*
--user-*
Options ignored, but stored as is internal in $cfg{usr-args} .
These options can be used in o-saft-usr.pm or o-saft-dbx.pm.
--experimental
Use experimental functionality.
Some functionality of this tool is under development and only used
when this option is given.
Options for tracing and debugging
--n --dry-run
Do not execute, just show commands (only useful in conjunction with
using openssl).
Difference --trace vs. --v
While --v is used to print more data, --trace is used to print
more information about internal data such as procedure names and/or
variable names and program flow.
--v
--verbose
Print more information about checks.
Note that this option should be first otherwise some debug messages
are missing.
Note that --v is different from -v (see above).
--v --v
Print remotely checked ciphers.
--v-cipher --cipher-v
Print remotely checked ciphers.
In contrast to --v --v above, this just prints the ciphers while
being checked, but no other verbose messages.
--trace
Print debugging messages.
--trace --trace
Print more debugging messages and pass trace=2 to Net::SSLeay and
Net::SSLinfo.
--trace --trace --trace
Print more debugging messages and pass trace=3 to Net::SSLeay and
Net::SSLinfo.
--trace --trace --trace --trace
Print processing of all command line arguments.
--trace-cli
Print complete command line first. Used for internal testing.
--trace--
--trace-arg
Print command line argument processing.
--trace-cmd
Trace execution of command processing (those given as +*).
--trace@
--trace-key
Print some internal variable names in output texts (labels).
Variable names are prefixed to printed line and enclosed in # .
Example without --trace-key :
      Certificate Serial Number:          deadbeef
Example with --trace-key :
      #serial#          Certificate Serial Number:          deadbeef
--trace=VALUE
Alias for --trace-VALUE options (see above).
Trace Option Alias Option
  • --trace=1 same as --trace
  • --trace=2 same as --trace --trace
  • --trace=arg same as --trace-arg
  • --trace=cmd same as --trace-cmd
  • --trace=key same as --trace-key
--trace-time
Prints timestamp in trace output. More timestamps are printed if
used together with --trace-cmd.
--trace=FILE
Use FILE instead of the default RC-FILE, i.e. .o-saft.pl.
--trace-me
Print debugging messages for o-saft.pl only, but not any modules.
--trace-not-me
Print debugging messages for modules only, but not o-saft.pl istself.
--hint
Print hint messages (!!Hint:).
--no-hint
Do not print hint messages (!!Hint:).
--warning
Print warning messages (**WARNING:).
--no-warning
Do not print warning messages (**WARNING:).
--exit=KEY
Terminate o-saft.pl at specified KEY. Please see TESTING below.
Options vs. Commands
For compatibility with other programs and lazy users, some arguments
looking like options are silently taken as commands. This means that
--THIS becomes +THIS then. These options are:
  • --help
  • --abbr
  • --todo
  • --chain
  • --default
  • --fingerprint
  • --list
  • --version
Take care that this behaviour may be removed in future versions as it
conflicts with those options and commands which actually exist, like:
  • --sni vs. +sni

LAZY SYNOPSIS

Commands
Following strings are treated as a command instead of target names:
  • ciphers
  • s_client
  • version
A warning will be printed.
Options
We support following options, which are all identical, for lazy users
and for compatibility with other programs.
Option Variants
--port PORT
--port=PORT
This applies to most such options, --port is just an example.
When used in the RC-FILE, the --OPTION=VALUE variant must be used.
Option Names
Dash -, dot . and/or underscore _ in option names are optional,
all following are the same:
--no.dns
--no-dns
--no_dns
--nodns
This applies to all such options, --no-dns is just an example.
Targets
Following syntax is supported also:
   o-saft.pl http://some.tld other.tld:3889/some/path?a=b
Note that only the hostname and the port are used from an URL.
Options vs. Commands
See Options vs. Commands in OPTIONS section above

CHECKS

All SSL related check performed by the tool will be described here.
General Checks
Lookup the IP of the given hostname (FQDN), and then tries to reverse
resolve the FQDN again.
SSL Ciphers
Check which ciphers are supported by target. Please see RESULTS for
details of this check.
SSL Connection
heartbeat
Check if "heartbead" extension is supported by target.
poodle
Check if target is vulnerable to POODLE attack (SSLv3 enabled).
robot
Check if target is vulnerable to ROBOT attack (server offers ciphers
with RSA encryption).
sloth
Check if target is vulnerable to SLOTH attack (server offeres RSA-MD5
or ECDSA-MD5 ciphers).
sweet32
Check if target is vulnerable to Sweet32 attack (server offers CBC or
CBC3 or DES or 3DES ciphers).
Note that FIPS-140 compliance requires 3DES ciphers, hence compliant
systems are then vulnerable to Sweet32 attacks.
ALPN
Check if target supports ALPN. Following messages are evaluated:
   ALPN protocol: h2-14
   No ALPN negotiated
Please see also CHECKS ALPN and NPN below.
SSL Vulnerabilities
ADH
Check if ciphers for anonymous key exchange are supported: ADH|DHA .
Such key exchanges can be sniffed.
EDH
Check if ephemeral ciphers are supported: DHE|EDH .
They are necessary to support Perfect Forward Secrecy (PFS).
BEAST
Check if ciphers with CBC for protocol SSLv1, SSLv3 or TLSv1 are used.
TLSv1.2 checks are not yet implemented.
CRIME
Connection is vulnerable if target supports SSL-level compression.
DROWN
Connection is vulnerable if target supports SSLv2 (with at least one cipher).
FREAK
Attack Against SSL/TLS to downgrade to EXPORT ciphers.
Currently (2018) a simple check is used: SSLv3 enabled and EXPORT
ciphers supported by server.
See CVE-2015-0204 and https://freakattack.com/ .
HEARTBLEED
Check if target is vulnerable to heartbleed attack, see CVE-2014-0160
and http://heartbleed.com/ .
HEIST
Not implemented.
There are no checks for the HEIST attack implemented, because this is
an attack on TCP/IP rather than SSL/TLS on top of TCP/IP.
KCI
Not implemented.
To perform a MiTM attack with Key Compromise Impersonation, the atta-
cker needs to engage the victim to install and use a client certificate.
This is considered a low risk and hence not tested here.
Logjam
Check if target is vulenerable to Logjam attack.
Check if target suports EXPORT ciphers and/or DH Parameter is less
than 2048 bits.
Lucky 13
Check if CBC ciphers are offered.
NOTE the recommendation to be safe againts Lucky 13 was to use RC4
ciphers. But they are also subjetc to attacks (see below). Hence the
check is only for CBC ciphers.
RC4
Check if RC4 ciphers are supported.
They are assumed to be broken.
Note that +rc4 reports the vulnerabilitiy to the RC4 Attack, while
+rc4_cipher simply reports if RC4 ciphers are offered. However the
the check, and hence the result, is the same.
PFS
Check if DHE ciphers are used. Also check if the TLS session ticket
is random or not used at all.
Currently (2018) only a simple check is used: only DHE ciphers used.
TLSv1.2 checks are not yet implemented.
POODLE
Check if target is vulnerable to POODLE attack (just check if SSLv3
is enabled).
Practical Invalid Curve Attack
This attack allows an attacker to read the servers private key if the
server does not check properly the passed points for a ecliptic curve
when EDH ciphers are used.
This check will not send multiple invalid points, but only checks if
the server closes the connection or responds with no matching cipher.
ROBOT
Bleichebacher's Oracle attack against SSL/TLS ciphers.
Not implemented.
https://robotattack.org/
SLOTH
Currently (2016) we check for ciphers with ECDSA, RSA-MD5.
Checking the TLS extension 'tls-unique' is not yet implemented.
Sweet32
Currently (2016) we check for ciphers with CBC or CBC3 or DES or 3DES.
Target (server) Configuration and Support
BEAST, BREACH, CRIME, DROWN, FREAK, Logjam, Lucky 13, POODLE, RC4, ROBOT, SLOTH, Sweet32
See above.
Renegotiation
Check if the server allows client-side initiated renegotiation.
Version rollback attacks
NOT YET IMPLEMENTED
Check if the server allows changing the protocol.
DH Parameter
Check if target's DH Parameter is less 512 or 2048 bits.
SSTP
Check if target supports SSTP by accepting method SSTP_DUPLEX_POST.
The check does not send other methods (like CONNECT) to verify if the
protocol is fully supported.
Supporting SSTP is considered insecure, because SSTP allows to tunnel
other, probably insecure, protocols.
Target (server) Certificate
Certificate Hashes
Check that fingerprint is not MD5.
Check that certificate private key signature is SHA2 or better.
Root CA
Provided certificate by target should not be a Root CA.
Self-signed Certificate
Certificate should not be self-signed.
FQDN is listed in subjectAltname (RFC2818)
The FQDN must be listed in the certificates subjectAltname.
The check command +rfc_2818_names is based on the info command
+verify_hostname . The check was added in 05/2017 because browsers
started to complain if the FQDN is not part of the subjectAltname.
IP in CommonName or subjectAltname (RFC6125)
NOT YET IMPLEMENTED
Basic Constraints
Certificate extension Basic Constraints should be CA:FALSE.
OCSP, CRL, CPS
Certificate should contain URL for OCSP and CRL.
Private Key encyption
Certificates signature key supports encryption.
Private Key encyption well known
Certificates signature key encryption algorithm is well known.
Public Key encyption
Certificates public key supports encryption.
Public Key encyption well known
Certificates public key encryption algorithm is well known.
Public Key Modulus size
Some (historic) SSL implementations are subject to buffer overflow if
the key exceeds 16384 or 32768 bits. The check is against 16384 bits.
Public Key Modulus Exponent size
The modulus exponent should be = 65537 as it is a prime number and an
easy to calculate exponent.
If the exponent is less than 65537, "Boradcast" attacks are possible.
However, some (mainly historic) SSL implementations may have problems
to connect because they are not able to do the crypt mathematics with
exponenents larger than 65536.
If ecliptic curves are used, the result for these checks is always
no (<<N/A ...).
Sizes and Lengths of Certificate Settings
Serial Number <= 20 octets (RFC5280, 4.1.2.2. Serial Number)
...
DV-SSL - Domain Validation Certificate
The Certificate must provide:
  • Common Name /CN= field
  • Common Name /CN= in subject or subjectAltname field
  • Domain name in commonName or altname field
EV-SSL - Extended Validation Certificate
This check is performed according the requirements defined by the CA/
Browser Forum https://www.cabforum.org/contents.html .
The Certificate must provide:
  • DV - Domain Validation Certificate (see above)
  • Organization name /O= Cn subject field
  • Organization name must be less to 64 characters
  • Business Category /businessCategory= in subject field
  • Registration Number /serialNumber= in subject field
  • Address of Place of Business in subject field
Required are: /C=, /ST=, /L=
Optional are: /street=, /postalCode=
  • Validation period does not exceed 27 month
See LIMITATIONS also.
Target (server) HTTP(S) Support
STS header (see RFC 6797)
Using STS is no perfect security. While the very first request using
http: is always prone to a MiTM attack, MiTM is possible to following
requests again, if STS is not well implemented on the server.
  • Request with http: should be redirected to https:
  • Redirects should use status code 301 (even others will work)
  • Redirect's Location header must contain schema https:
  • Redirect's Location header must redirect to same FQDN
  • Redirect may use Refresh instead of Location header (not RFC6797)
  • Redirects from HTTP must not contain STS header
  • Answer from redirected page (HTTPS) must contain STS header
  • Answer from redirected page for IP must not contain STS header
  • STS header must contain includeSubDirectoy directive
  • STS header max-age should be less than 1 month
  • STS must not be set in http-equiv attribute of a meta TAG
STS header preload attribute (+preload)
To satisfy the requirements on https://hstspreload.appspot.com/ the
HSTS header must:
  • have the max-age with at least 18 weeks (10886400 seconds)
  • have the includeSubDomains attribute
  • have the preload attribute
  • redirect to https first, then to sub-domains (if redirected)
  • have an HSTS header in each redirect to https.
Additionally, the site must have:
  • a valid certificate
  • serve all subdomains over https.
Except the last requirement, +preload will do the checks.
Note that +preload is defined in .o-saft.pl only.
Public Key Pins header
TBD - to be described ...
Sizes
Mainly in the certificate various counts, lengths and sizes of values
are checked and reported. All commands for these checks start with
+cnt_ or +len_. Up to now, there is no yes or no value
for these checks.
Following commands will check the value to be in a specific range to
become yes or no:
  • +sts_maxage1d - yes if HSTS maxage < 1 day
  • +sts_maxage1m - yes if HSTS maxage < 1 month
  • +sts_maxage1y - yes if HSTS maxage < 1 year
  • +sts_maxage18 - yes if HSTS maxage < 18 weeks (5 months)
  • +sts_maxagexy - yes if HSTS maxage > 1 year
  • +modulus_exp_1 - Public Key Modulus Exponent <>1
  • +modulus_exp_65537 - Public Key Modulus Exponent =65537
  • +modulus_exp_oldssl - Public Key Modulus Exponent <65537
  • +modulus_size_oldssl - Public Key Modulus <16385 bits
For some details of these checks, please see the description above at
"Public Key Modulus Exponent size"
The recommendations for DH parameters (RSA and ecliptice curve) are
are checked as follows:
  • +dh_512 - DH Parameter >= 512 bits
  • +dh_2048 - DH Parameter >= 2048 bits
  • +ecdh_256 - DH Parameter >= 256 bits (ECDH)
  • +ecdh_512 - DH Parameter >= 512 bits (ECDH)
Note that only one of the checks +dh_* and +ecdh_* can return
yes.
ALPN and NPN
The commands for the checks to report yes or no, are +hasalpn
and +hasnpn.
Both, the Application Layer Protocol Negotiation (ALPN) and the Next
Protocol Negotiation (NPN) will be tested. The commands for that are:
  • +alpns
  • +npns
Each, ALPN and NPN, is tested separately with all known protocols.
The test sets only one protocol, tries to make a connection and then
checks if the protocol was accepted by the server. The collected list
of protocols will be printed with the aforementioned commands, or the
+info command. Note the difference for the commands +next_protocols
and +alpns, where +next_protocols simply reports what the server
itself advertises, while +alpns reports what the server supports if
asked for.
Compliances
Note that it is not possible to satisfy all following compliances. Best
match is: PSF and ISM and PCI and lazy BSI TR-02102-2.
In general it is difficult to satisfy all conditions of a compliances,
and it is also difficult to check all these conditions. That's why some
of the compliances checks are not completely implemented, for details
please see blow.
Note that output of results of some checks is disabled in the RC-FILE
by default. A "!!Hint:" message will be printed, if any of these checks
are used.
BSI TR-02102-2 (+tr-02102+ tr-02102- +bsi)
Checks if connection and ciphers are compliant according TR-02102-2,
see https://www.bsi.bund.de/SharedDocs/Downloads/DE/BSI/Publikationen
/TechnischeRichtlinien/TR02102/BSI-TR-02102-2_pdf.pdf?__blob=publicationFile
(following headlines are taken from TR-02102-2 Version 2016-01)
  • 3.1.3 Schlüssellängen bei EC-Verfahren
  • 3.2 SSL/TLS_Versionen
Only TLSv1.2 allowed (except for +tr-02102- which also allows
TLSv1.1)
  • 3.3.1 Empfohlene Cipher Suites
Allows only *DHE-*-SHA256, *DHE-*-SHA384, *DH-*-SHA256 and
*DH-*-SHA384 ciphers and PSK ciphers with ephermeral keys.
For +tr-02102+ they must be AES-GCM, +tr02102- also allows
AES-CBC.
  • 3.3.2 Übergangsregelungen
SHA1 temporary allowed. SHA256 and SHA384 recommended.
RC4 not reocmmended.
Use of SHA1 will only be checked for +tr-02102+
  • 3.4.1 Session Renegotation
Only server-side (secure) renegotiation allowed (see RFC5280).
  • 3.4.2 Verkürzung der HMAC-Ausgabe
Truncated HMAC according RFC 6066 not recommended.
  • 3.4.3 TLS-Kompression und der CRIME-Angriff
No TLS compression.
  • 3.4.4 Der Lucky 13-Angriff
  • 3.4.5 Die "Encrypt-thn-MAC"-Erweiterung
Use of AES-GCM ciphers only.
Use of Encrypt-then-MAC according RFC 7366 cannot be checked.
  • 3.4.6 Die Heartbeat-Erweiterung
Target must not support the heartbeat extension.
  • 3.4.7 Die Extended Master Secret Extension
Use of Extended Master Secret Extension according RFC 7627 cannot
be checked.
  • 3.5 Authentisierung der Kommunikationspartner
Not checked as only applicable for VPN connections.
  • 3.6 Domainparameter und Schlüssellängen
Check if signature key is > 2000 bits.
  • 3.6.1 Verwendung von elliptischen Kurven
**NOT YET IMPLEMENTED**
Use only following curves according RFC 5639 and RFC 7027:
brainpoolP256r1, brainpoolP384r1, brainpoolP512r1
Use of secp256r1 and secp384r1 temporary allowed.
  • 4.1 Schlüsselspeicherung
This requirement is not testable from remote.
  • 4.1 Umgang mit Ephemeralschlüsseln
This requirement is not testable from remote.
  • 4.3 Zufallszahlen
This requirement is not testable from remote.
BSI TR-03116-4 (+tr-03116+ +tr-03116- +bsi)
Checks if connection and ciphers are compliant according TR-03116-4,
see https://www.bsi.bund.de/SharedDocs/Downloads/DE/BSI/Publikationen
/TechnischeRichtlinien/TR03116/BSI-TR-03116-4.pdf?__blob=publicationFile
(following headlines are taken from there)
  • 2.1.1 TLS-Versionen und Sessions
Allows only TLS 1.2.
  • 2.1.2 Cipher Suites
Cipher suites must be ECDHE-ECDSA or -RSA with AES128 and SHA265.
For curiosity, stronger cipher suites with AES256 and/or SHA384 are
not not allowed. To follow this curiosity the +bsi-tr-03116- (lazy)
check allows the stronger cipher suites ;-)
  • 2.1.1 TLS-Versionen und Sessions
The TLS session lifetime must not exceed 2 days.
  • 2.1.4.2 Encrypt-then-MAC-Extension
  • 2.1.4.3 OCSP-Stapling
MUST have OCSP Stapling URL.
  • 4.1.1 Zertifizierungsstellen/Vertrauensanker
Certificate must provide all root CAs. (NOT YET IMPLEMENTED).
Should use a small certificate trust chain.
  • 4.1.2 Zertifikate
Must have CRLDistributionPoint or AuthorityInfoAccess.
End-user certificate must not be valid longer than 3 years.
Root-CA certificate must not be valid longer than 5 years.
Certificate extension pathLenConstraint must exist, and should be
a small value ("small" is not defined).
All certificates must contain the extension KeyUsage.
Wildcards for CN or Subject or SubjectAltName are not allowed
in any certificate.
EV certificates are recommended (NOT YET checked properly).
  • 4.1.3 Zertifikatsverifikation
Must verify all certificates in the chain down to their root-CA.
(NOT YET IMPLEMENTED).
Certificate must be valid according issue and expire date.
All Checks must be doen for all certificates in the chain.
  • 4.1.4 Domainparameter und Schlüssellängen
This requirement is not testable from remote.
  • 4 5.2 Zufallszahlen
This requirement is not testable from remote.
RFC 2818 (+rfc2818)
Check if the FQDN is listed in the certificates subjectAltname.
RFC 6125 (+rfc6125)
Checks values CommonName, Subject and SubjectAltname of the
certificate for:
  • must all be valid characters for DNS
  • must not contain more than one wildcards
  • must not contain invalid wildcards
  • must not contain invalid IDN characters
RFC 6797 (+rfc6797)
Same as STS header +hsts .
RFC 7525 (+rfc7525)
Checks if connection and ciphers are compliant according RFC 7525.
See http://tools.ietf.org/rfc/rfc7525.txt
(following headlines are taken from there)
  • 3.1.1. SSL/TLS Protocol Versions
SSLv2 and SSLv3 must not be supportetd.
TLSv1 should only be supported if there is no TLSv1.1 or TLSv1.2.
Either TLSv1.1 or TLSv1.2 must be supported, prefered is TLSv1.2.
  • 3.1.2. DTLS Protocol Versions
DTLSv1 and DTLSv1.1 must not be supported.
  • 3.1.3. Fallback to Lower Versions
(check implecitely done by 3.1.1, see above)
  • 3.2. Strict TLS
Check if server provides Strict Transport Security.
(STARTTLS check NOT YET IMPLEMENTED).
  • 3.3. Compression
Compression on TLS must not be supported.
  • 3.4. TLS Session Resumption
Server must support resumtion and random session tickets.
(Randomnes of session tickets implemented YET experimental.)
Check if ticket is authenticated and encrypted NOT YET IMPLEMENTED.
  • 3.5. TLS Renegotiation
Server must support renegotiation.
  • 3.6. Server Name Indication
(Check for SNI support implemented experimental.)
  • 4. Recommendations: Cipher Suites
  • 4.1. General Guidelines
  • 4.2. Recommended Cipher Suites
Check for recommended ciphers.
  • 4.3. Public Key Length
DH parameter must be at least 256 bits or 2048 its with EC.
(Check currently, 4/2016, based on openssl which may not provide DH
parameters for all ciphers.)
  • 4.5. Truncated HMAC
TLS extension "truncated hmac" must not be used.
  • 6. Security Considerations
  • 6.1. Host Name Validation
Given hostname must matches hostname in certificate's subject.
  • 6.2. AES-GCM
  • 6.3. Forward Secrecy
  • 6.4. Diffie-Hellman Exponent Reuse
(NOT YET IMPLEMENTED).
  • 6.5. Certificate Revocation
OCSP and CRL Distrbution Point in cetificate must be defined.

OUTPUT

All output is designed to make it easily parsable by postprocessors.
Following rules are used:
  • Lines for formatting or header lines start with =.
  • Lines for verbosity or tracing start with #.
  • Errors and warnings start with **, hints start with !!.
  • Empty lines are comments ;-)
  • Label texts end with a separation character; default is :.
  • Label and value for all checks are separated by at least one TAB character.
  • Texts for additional information are enclosed in << and >>.
  • N/A is used when no proper informations was found or provided.
Replace N/A by whatever you think is adequate: "No answer",
"Not available", "Not applicable", ...
Lines not described above, will have the form (be default):
        Label for information or check:  TABresult
For more details on these lines, please refer to RESULTS above.
When used in --legacy=full or --legacy=simple mode, the output
may contain formatting lines for better (human) readability.
Errors, Warnings, Hints
Errors, warnings and hints may be part of the output as needed. While
errors and warnings are printed immediately as they occour during the
program flow, hints are printed right after the corresponding result.
Errors and warnings start with a unique 3-digit number.
Hints print an additional explanation of a specific result. They are
are defined statically in the program code, or can be added on demand
by using the option --cfg-hint=KEY=TEXT .
Postprocessing Output
It is recommended to use the --legacy=quick option, if the output
should be postprocessed, as it omits the default separation character
(: , see above) and just uses on single tab character (0x09, \t or
TAB) to separate the label text from the text of the result. Example:
        Label of the performed checkTABresult
More examples for postprocessing the output can be found here:
https://github.com/OWASP/O-Saft/blob/master/contrib

CUSTOMIZATION

This tools can be customized as follows:
  • Using command line options
This is a simple way to redefine specific settings. Please see
CONFIGURATION OPTIONS below.
  • Using Configuration file
A configuration file can contain multiple configuration settings.
Syntax is simply KEY=VALUE. Please see CONFIGURATION FILE below.
  • Using resource files
A resource file can contain multiple command line options. Syntax
is the same as for command line options iteself. Each directory
may contain its own resource file. Please see RC-FILE below.
  • Using debugging files
These files are --nomen est omen-- used for debugging purposes.
However, they can be (mis-)used to redefine all settings too.
Please see DEBUG-FILE below.
  • Using user specified code
This file contains user specified program code. It can also be
(mis-)used to redefine all settings. Please see USER-FILE below.
Customization is done by redefining values in internal data structure
which are:  %cfg,  %data,  %checks,  %text,  %scores .
Unless used in DEBUG-FILE or USER-FILE, there is no need to know
these internal data structures or the names of variables; the options
will set the proper values. The key names being part of the option,
are printed in output with the --trace-key option.
I.g. texts (values) of keys in  %data are those used in output of the
Informations section. Texts of keys in  %checks are used for output
in Performed Checks section. And texts of keys in  %text are used
for additional information lines or texts (mainly beginning with =).
Configuration File vs. RC-FILE vs. DEBUG-FILE
  • CONFIGURATION FILE
Configuration Files must be specified with one of the --cfg_*
options. The specified file can be a valid path. Please note that
only the characters: -zA-Z_0-9,.\/()- are allowed as pathname.
Syntax in configuration file is: KEY=VALUE where KEY is any
key as used in internal data structure.
the keys in output).
  • RC-FILE
Resource files are searched for and used automatically.
For details see RC-FILE below.
  • DEBUG-FILE
Debug files are searched for and used automatically.
For details see DEBUG-FILE below.
  • USER-FILE
The user program file is included only if the --usr option was
used. For details see USER-FILE below.
CONFIGURATION OPTIONS
Configuration options are used to redefine texts and labels or score
settings used in output. The options are:
  • --cfg-cmd=CMD=LIST
  • --cfg-checks=KEY=TEXT
  • --cfg-data=KEY=TEXT
  • --cfg-hint=KEY=TEXT
  • --cfg-text=KEY=TEXT
  • --cfg-cipher=CIPHER=TEXT
KEY is the key used in the internal data structure, and TEXT is the
value to be set for this key. Note that unknown keys will be ignored
silently.
If KEY=TEXT is an exiting filename, all lines from that file are
read and set. For details see CONFIGURATION FILE below.
CIPHER must be a valid cipher suite name as shown with:
   o-saft.pl ciphers
NOTE that such configuration options should be used before any --help
or --help=* option, otherwise the changed setting is not visible.
CONFIGURATION FILE
Note that the file can contain KEY=TEXT pairs for any kind of the
configuration as given by the --cfg_CFG option.
For example when used with --cfg_text=FILE only values for  %text
will be set, when used with #--cfg_data=FILE--cfg_data=FILE only values for %data
will be set, and so on. KEY is not used when KEY=TEXT is an existing
filename. Though, it's recommended to use a non-existing key, i.e.:
--cfg-text=my_file=some/path/to/private/file .
RC-FILE
The rc-file will be searched for in the working directory only.
The name of the rc-file is the name of the program file prefixed by a
. (dot), for example: .o-saft.pl.
A rc-file can contain any of the commands and options valid for the
tool itself. The syntax for them is the same as on command line. Each
command or option must be in a single line. Any empty or comment line
will be ignored. Comment lines start with # or =.
Note that options with arguments must be used as KEY=VALUE instead
of KEY VALUE.
Configurations options must be written like --cfg-CFG=KEY=VALUE
where CFG is any of: cmd, check, data, text and KEY is
any key from internal data structure (see above).
All commands and options given on command line will overwrite those
found in the rc-file.
DEBUG-FILE
All debugging functionality is defined in o-saft-dbx.pm, which will
be searched for using paths available in @INC variable.
Syntax in this file is Perl code. For details see DEBUG below.
USER-FILE
All user functionality is defined in o-saft-usr.pm, which will be
searched for using paths available in @INC variable.
Syntax in this file is Perl code.
All functions defined in o-saft-usr.pm are called when the option
--usr was given. The functions are defined as empty stub, any code
can be inserted as need. Please see perldoc o-saft-usr.pm to see
when and how these functions are called.
SHELL TWEAKS
Configuring the shell environment where the tool is startet, must be
done before the tools starts. It is not really a task for the tool
itself, but it can simplify your life, somehow.
There exist customizations for some commonly used shells, please see
the files in the ./contrib/ directory.
COMMANDS
The option --cfg-cmd=CMD=LIST can be used to define own commands.
When configuring own commands, CMD must not be one of the commands
listed with --help=intern and CMD must constist only of digits and
letters.
Examples in .o-saft.pl are +preload and +ciphercheck .

CIPHER NAMES

While the SSL/TLS protocol uses integer numbers to identify ciphers,
almost all tools use some kind of `human readable' texts for cipher
names.
These numbers (which are most likely written as hex values in source
code and documentations) are the only true identifier, and we have to
rely on the tools that they use the proper integers.
As such integer or hex numbers are difficult to handle by humans, we
decided to use human readable texts. Unfortunately no common standard
exists how to construct the names and map them to the correct number.
Some, but by far not all, oddities are described in Name Rodeo.
The rules for specifying cipher names are:
  • 1. textual names as defined by IANA (see [IANA])
  • 2. mapping of names and numbers as defined by IANA (see [IANA])
  • 3. - and _ are treated the same
  • 4. abbreviations are allowed, as long as they are unique
  • 5. beside IANA, openssl's cipher names are preferred
  • 6. name variants are supported, as long as they are unique
  • 7. hex numbers can be used
[IANA] http://www.iana.org/assignments/tls-parameters/tls-parameters.txt September 2013
[openssl] ... openssl 1.0.1
If in any doubt, use +list to get an idea about the mapping.
Use --help=regex to see which regex are used to handle all these
variants herein.
Mind the traps and dragons with cipher names and what number they are
actually mapped to. In particular when --lib, --exe or --openssl
options are in use. Always use these options with +list command too.
Name Rodeo
As said above, the SSL/TLS protocol uses integer numbers to identify
ciphers, but almost all tools use some kind of human readable texts
for cipher names.
For example the cipher commonly known as DES-CBC3-SHA is identified
by 0x020701c0 (in openssl) and has SSL2_DES_192_EDE3_CBC_WITH_SHA
as constant name. A definition is missing in IANA, but there is
TLS_RSA_WITH_3DES_EDE_CBC_SHA . Thers is also 0x000A for the same
cipher DES-CBC3-SHA. Both are valid, first one when used with SSLv2,
and second one when used with SSLv3.
It's the responsibility of each tool to map the human readable cipher
name to the correct (hex, integer) identifier.
For example Firefox uses dhe_dss_des_ede3_sha, which is what?
Furthermore, there are different acronyms for the same thing in use.
For example DHE and EDH both mean "Ephemeral Diffie-Hellman".
Comments in the openssl(1) sources mention this. And for curiosity
these sources use both in cypher names but allow EDH as shortcut
only in openssl's "ciphers" command. Wonder about (up to 1.0.1h):
   openssl ciphers -V EDH
   openssl ciphers -V DHE
   openssl ciphers -V EECDH
   openssl ciphers -V ECDHE
Next example is ADH which is also known as DH_anon or DHAnon
or DHA or ANON_DH.
You think this is enough? Then have a look how many acronyms are used
for "Tripple DES".
Compared to above, the interchangeable use of - vs. _ in human
readable cipher names is just a very simple one. However, see openssl
again what following means (returns):
   openssl ciphers -v RC4-MD5
   openssl ciphers -v RC4+MD5
   openssl ciphers -v RC4:-MD5
   openssl ciphers -v RC4:!MD5
   openssl ciphers -v RC4!MD5
Looking at all these oddities, it would be nice to have a common unique
naming scheme for cipher names. We have not. As the SSL/TLS protocol
just uses a number, it would be natural to use the number as uniq key
for all cipher names, at least as key in our internal sources.
Unfortunately, the assignment of ciphers to numbers changed over the
years, which means that the same number refers to a different cipher
depending on the standard, and/or tool, or version of a tool you use.
As a result, we cannot use human readable cipher names as identifier
(aka unique key), as there are to many aliases for the same cipher.
And also the number cannot be used as unique key, as a key may have
multiple ciphers assigned.

KNOWN PROBLEMS

This section describes knwon problems, and known error messages which
may occour when using o-saft.pl. This sections can be used as FAQ too
as it gives hints and workarounds.
Segmentation fault
Sometimes the program terminates with a Segmentation fault. This
mainly happens if the target does not return certificate information.
If so, the --no-cert option may help.
**WARNING: empty result from openssl; ignored at ...
This most likely occurs when the provided cipher is not accepted by
the server, or the server expects client certificates.
**WARNING: unknown result from openssl; ignored at ...
This most likely occurs when the openssl executable is used with a
very slow connection. Typically the reason is a connection timeout.
Try to use --timeout=SEC option.
To get more information, use --v --v and/or --trace also.
**WARNING: undefined cipher description
May occour if ciphers are checked, but no description is available for
them herein. This results in printed cipher checks like:
        EXP-KRB5-RC4-MD5                no       <undef>>
instead of:
        EXP-KRB5-RC4-MD5                no       weak
**WARNING: Can't make a connection to your.tld:443; no initial data
**WARNING: Can't make a connection to your.tld:443; target ignored
This message occours if the underlaying SSL library (i.e. libssl.a)
was not able to connect to the target. Known observed reasons are:
  • target does not support SSL protocol on specified port
  • target expects a client certificate in ClientHello message
More details why the connection failed can be seen using --trace=2 .
If the targets supports SSL, it should be at least possible to check
for supported ciphers using +cipherall instead of +cipher .
Use of uninitialized value $headers in split ... do_httpx2.al)
The warning message (like follows or similar):
Use of uninitialized value $headers in split at blib/lib/Net/SSLeay.pm
(autosplit into blib/lib/auto/Net/SSLeay/do_httpx2.al) line 1290.
occurs if the target refused a connection on port 80.
This is considered a bug in Net::SSLeay.
Workaround to get rid of this message: use --no-http option.
invalid SSL_version specified at ... IO/Socket/SSL.pm
This error may occur on systems where a specific SSL version is not
supported. Subject are mainly SSLv2, SSLv3 TLSv1.3 and DTLSv1.
For DTLSv1 the full message looks like:
      invalid SSL_version specified at C:/programs/perl/perl/vendor/lib/IO/Socket/SSL.
See also Note on SSL versions .
Workaround: use options like: --no-sslv2 --no-sslv3 --no-tlsv13 --no-dtlsv1
Use of uninitialized value $_[0] in length at (eval 4) line 1.
This warning occours with IO::Socket::SSL 1.967, reason is unknown.
It seems not to harm functionality, hence no workaround, just ignore.
Use of uninitialized value in subroutine entry at lib/IO/Socket/SSL.pm line 430.
Some versions of IO::Socket::SSL return this error message if *-MD5
ciphers are used with other protocols than SSLv2.
Workaround: use --no-md5-cipher option.
Can't locate auto/Net/SSLeay/CTX_v2_new.al in @INC ...
Underlaying library doesn't support the required SSL version.
See also Note on SSL versions .
Workaround: use --ssl-lazy option, or corresponding --no-SSL option.
Read error: Connection reset by peer (,199725) at blib/lib/Net/SSLeay.pm (autosplit into blib/lib/auto/Net/SSLeay/tcp_read_all.al) line 535.
Error reported by some Net::SSLeay versions. Reason may be a timeout.
This error cannot be omitted or handled properly.
Workaround: try to use same call again (no guarantee, unfortunatelly)
Odd number of elements in anonymous hash at Net/SSLinfo.pm line 1613.
This warning from perl have been observed when the connection to the
target to check for supported ciphers cannot be established.
This message can be ignored.
openssl: ...some/path.../libssl.so.1.0.0: no version information available (required by openssl)
Mismatch of openssl executable and loaded underlaying library. This
most likely happens when options --lib=PATH and/or --exe=PATH are
used. See also Note on SSL versions .
Hint: use following commands to get information about used libraries:
  o-saft.pl +version
  o-saft.pl --v --v +version
Integer overflow in hexadecimal number at ...
This error message may occour on 32-bit systems if perl was not com-
piled with proper options. I.g. perl automatically converts the value
to a floating pont number.
Please report a bug with output of following command:
  o-saft.pl +s_client +dump your.tld
<<openssl did not return DH Paramter>>
Text may be part of a value. This means that all checks according DH
parameters and logkam attack cannot be done.
Workaround: try to use --openssl=TOOL option.
This text may appears in any of the compliance checks (like +rfc7525)
which may be a false positive. For these checks openssl is also used
to get the DH Parameter.
Workaround: not available yet
No output with +help and/or --help=todo
On some (mainly Windows-based) systems using
  o-saft.pl +help
  o-saft.pl --help
does not print anything.
Workaround: use --v option.
  o-saft.pl +help --v
or
  o-saft.pl +help | more
Character set (like UTF-8) not recognized in some tools
Some tools do not diplay all characters properly, i.e. some versions
of podviewer. It is not the obligation of this tool to fix well known
bugs in other tools. However, we can offer workarounds.
Workaround: generate the affected output using --std-format=* options
For example:
   o-saft.pl --no-rc --std-format=raw --help=gen-pod
**WARNING: on MSWin32 additional option --v required, sometimes ...
On some (mainly Windows-based) systems this may happen when calling
for example:
  o-saft.pl --help=FAQ
which then may produce:
  **WARNING: on MSWin32 additional option  --v  required, sometimes ...
  === reading: ./.o-saft.pl (RC-FILE done) ===
  === reading: Net/SSLinfo.pm (O-Saft module done) ===
  **USAGE: no command given
  # most common usage: 
    o-saft.pl +info   your.tld
    o-saft.pl +check  your.tld
    o-saft.pl +cipher your.tld
  # for more help use:
    o-saft.pl --help 
Workaround: use full path to perl.exe, for example
  C:\Programs\perl\bin\perl.exe o-saft.pl --help=FAQ
Performance Problems
There are various reasons when the program responds slow, or seems to
hang. Performance issues are most likely a target-side problem. Most
common reasons are (no specific order):
  • a) DNS resolver problems
Try with --no-dns
  • b) target does not accept connections for https
Try with --no-http
  • c) target's certificate is not valid
Try with --no-cert
  • d) target expects that the client provides a client certificate
No option provided yet ...
  • e) target does not handle Server Name Indication (SNI)
Try with --no-sni
  • f) use of external openssl(1) executable
Use --no-openssl
  • g) target does not respond at all and/or blocks
Use --ssl-error
For a detailed description, please see Connection Problems.
Other options which may help to get closer to the problem's cause:
--trace-time, --timeout=SEC, --trace, --trace-cmd
Using --trace=time should show following times:
  • DNS: 1 - 10 sec
  • no SNI: 1 - 10 sec
  • connection test: 1 - 5 sec
  • need_default: <5 sec
  • need_cipher: 1 - 60 sec (+cipher with socket)
  • need_cipher: 1 - 20 sec (+cipherraw)
  • prepare checks: 2 - 20 sec
  • info: <1 sec
  • check: <1 sec

LIMITATIONS

Commands
Some commands cannot be used together with others, for example:
+cipher, +ciphers, +list, +libversion, +version, +check, +help,
+protocols .
+quick should not be used together with other commands, it returns
strange output then.
+protocols requires openssl(1) with support for -nextprotoneg
option. Otherwise the value will be empty.
Options
The option --port=PORT must preceed --host=HOST for a target like
HOST:PORT .
The characters + and = cannot be used for --separator==CHAR option.
Following strings should not be used in any value for options:
+check, +info, +quick, --header
as they my trigger the ---header option unintentional.
The used timeout(1) command cannot be defined with a full path like
openssl(1) can with the --openssl=path/to/openssl.
--cfg_text=FILE cannot be used to redefine the texts yes and no
as used in the output for +cipher command.
Checks (general)
+constraints
This check is only done for the certificate provided by the target.
All other certificate in the chain are not checked.
This is currently (2018) a limitation in o-saft.pl.
Broken pipe
This error message most likely means that the connection to specified
target was not possible (firewall or whatever reason).
Target Certificate Chain Verification
The systems default capabilities i.e. libssl.so, openssl, are used to
verify the target's certificate chain. Unfortunately various systems
have implemented different approaches and rules how identify and how
to report a successful verification. As a consequence this tool can
only return the same information about the chain verification as the
used underlying tools. If that information is trustworthy depends on
how trustworthy the tools are.
These limitations apply to following commands:
  • +verify
  • +selfsigned
Following commands and options are useful to get more information:
  • +chain_verify, +verify, +error_verify, +chain, +s_client
  • --ca-file, --ca-path, --ca-depth
User Provided Files
Please note that there cannot be any guarantee that the code provided
in the DEBUG-FILE o-saft-usr.pm or USER-FILE o-saft-usr.pm
will work flawless. Obviously this is the user's responsibility.
Problems and Errors
Checking the target for supported ciphers may return that a cipher is
not supported by the server misleadingly. Reason is most likely an
improper timeout for the connection. See --timeout=SEC option.
If the specified targets accepts connections but does not speak SSL,
the connection will be closed after the system's TCP/IP-timeout. This
script will hang (about 2-3 minutes).
If reverse DNS lookup fails, an error message is returned as hostname,
like: <<gethostbyaddr() failed>>.
Workaround to get rid of this message: use --no-dns option.
All checks for EV are solely based on the information provided by the
certificate.
Some versions of openssl (< 1.x) may not support all required options
which results in various error messages or --more worse-- may not be
visibale at all. Available functionalitity of openssl will be checked
for right at the beginning Proper Warnings and hints are printed.
Following table shows the openssl option and how to disbale it within
o-saft:
  • -nextprotoneg --no-nextprotoneg
  • -reconnect --no-reconnect
  • -tlsextdebug --no-tlsextdebug
  • -alpn --no-alpn
Connection Problems
Sometimes the connection cannot be established. This may have various
reasons. Unfortunaly this script seems to hang then. In particular
when checking for ciphers with +cipher or +cipherall . The reason
is most likely that the server does not respond to the TCP/IP request
and hence the script closes the connection after the configured time-
out (see --timeout=SEC option).
Continous connection attempts can be inhibited with the --ssl-error
option, which is set by default. Avoiding further connections results
in a loss of information and consequentely leading to wrong checks.
It is a trade-off to wait for all information done accurately, or to
get the results quickly. The logic to stop connecting for --ssl-error
can be controlled with following additional options:
  • --ssl-error-max=CNT - max. continous errors
  • --ssl-error-timeout=SEC - timeout when to treat a failure as error
  • --ssl-error-total=CNT - max. amount of errors
This means that no more connections are made when more than
  • --ssl-error-max errors occour sequentialy
or
  • --ssl-error-total errors occoured
Examples:
  • --ssl-error-max=3
  • --ssl-error-timeout=6
  • --ssl-error-total=6
no more connections are made if for example any sequence of timeouts
occour:
 0 5 2 2                   - --ssl-error-max matches 
 0 1 3 0 0 0 4 1 2 2 2     - --ssl-error-max matches
 0 5 0 2 0 2 2 0 2 0 2     - --ssl-error-total matches
This allows to fine-tune the condition when to stop connecting to the
target. For example, continous but not consecutive timeouts may indi-
cate a bad or instable network connection, but not that the target to
be connected blocks. In such a case sequence of timeouts like follows
may be observed (assuming --ssl-error-max=3):
 0 5 1 2 2 2 4 2 3 2 3 3 3 2
       ^                 ^____ stop for --ssl-error-timeout=3
       |______________________ stop for --ssl-error-timeout=2
On normal (even slow) network connections dozens of connections per
second are usual, hence the timeout is always 0 or 1. Based on that
experience --ssl-error is enabled and set with defaults as follows:
  • --ssl-error-max=5
  • --ssl-error-timeout=1
  • --ssl-error-total=10
Poor Systems
Use of openssl(1) is disabled by default on Windows due to various
performance problems. It needs to be enabled with --openssl option.
On Windows the usage of openssl s_client needs to be enabled using
--s_client option.
On Windows it's a pain to specify the path for --openssl=TOOL option.
Variants are:
  • --openssl=/path/to/openssl.exe
  • --openssl=X:/path/to/openssl.exe
  • --openssl=\path\to\openssl.exe
  • --openssl=X:\path\to\openssl.exe
  • --openssl=\\path\\to\\openssl.exe
  • --openssl=X:\\path\\to\\openssl.exe
You have to fiddle around to find the proper one.
Debug and Trace Output
When both --trace-key and --trace-cmd options are used, output is
mixed, obviously. Hint: output for --trace-cmd always contains "CMD".
Any --trace* option implies --trace-time .

DEPENDENCIES

All Perl modules and all private moduels and files will be searched
for using paths available in the @INC variable. @INC will
be prepended by following paths:
  • .
  • ./lib
  • INSTALL_PATH
  • INSTALL_PATH/lib
Where INSTALL_PATH is the path where the tool is installed.
To see which files have been included use:
   o-saft.pl +version --v --user
Perl Modules
  • IO::Socket::SSL(3pm)
  • IO::Socket::INET(3pm)
  • Net::SSLeay(3pm)
  • Net::SSLinfo
  • Net::SSLhello
Perl modules loaded and used for some options only:
  • Net::DNS(3pm)
  • Time::Local(3pm)
Additional Files used if requested
  • .o-saft.pl
  • o-saft-dbx.pm
  • o-saft-man.pm
  • o-saft-usr.pm
  • o-saft-README
  • o-saft-docker

INSTALLATION

The tool can be installed in any path. It just requres the modules as
described in DEPENDENCIES above. However, it's recommended that the
modules Net::SSLhello and Net::SSLinfo are found in the directory
./Net/ where o-saft.pl is installed.
For security reasons, most modern libraries disabled or even removed
insecure or "dirty" functionality. As this tool's purpose is to find
such insecure settings, functions, etc., it needs these dirty things
enabled. What we need is (incomplete list):
  • insecure protocols like SSLv2, SSLv3
  • more more ciphers enabled, like NULL-MD5, AECDH-NULL-SHA, etc.
  • some SSL extensions and options
Therefore we recommend to compile and install at least following:
  • openssl with SSLv2, SSLv3 and more ciphers enabled
  • Net::SSLeay compiled with openssl version as described before.
Please read the SECURITY section first before following the install
instructions below.
OpenSSL
Currently (since 18.06.18) it is recommend to build openssl using
   contrib/install_openssl.sh
Other possibilities are:
  • compiling openssl using following sources
https://github.com/PeterMosmans/openssl/
see Example: Compile OpenSSL,
The sources are available at
A precomiled static versions are available at
For all following installation examples we assume:
  • openssl-1.0.2-chacha.zip or openssl-1.0.2d.tar.gz
  • /usr/local as bae installation directory
  • a bourne shell (sh) compatible shell
Example: Precompiled OpenSSL
Simply download the tarball or zip file for your platform, unpack it,
and install (copy) the binaries into a directory of your choice.
Example: Compile OpenSSL
OpenSSL can be used from http://openssl.org/ or, as recommended, from
https://github.com/PeterMosmans/openssl/ .
OpenSSL-chacha
Compiling and installing the later is as simple as:
   unzip openssl-1.0.2-chacha.zip
   cd openssl-1.0.2-chacha
   ./config --shared -Wl,-rpath=/usr/local/lib
   make
   make test
   make install
which will install openssl, libssl.so, libcrypto.so and some include
files as well as the include files in /usr/local/ .
The shared version of the libraries are necessary for Net::SSLeay.
OpenSSL.org
Building openssl from the offical openssl.org sources requires some
patching before compiling and installing the libraries and binaries.
Example with openssl-1.0.2d:
  echo == unpack tarball
  tar xf openssl-1.0.2d.tar.gz
  cd openssl-1.0.2d

  echo == backup files to be modified
  cp ssl/s2_lib.c{,.bak}
  cp ssl/s3_lib.c{,.bak}
  cp ssl/ssl3.h{,.bak}
  cp ssl/tls1.h{,.bak}
  echo == patch files
  vi ssl/tls1.h         +/TLS1_ALLOW_EXPERIMENTAL_CIPHERSUITES/
           # define TLS1_ALLOW_EXPERIMENTAL_CIPHERSUITES  1
  vi ssl/ssl3.h ssl/s{2,3}_lib.c   +"/# *if 0/"
           #==> remove all   # if 0  and corresponding  #endif
           #    except if lines contain:
           #        _FZA
           #        /* Fortezza ciphersuite from SSL 3.0
           #        /* Do not set the compare functions,
           #        if (s->shutdown & SSL_SEND_SHUTDOWN)
  echo == configure with static libraries
  echo omitt the zlib options if zlib-1g-dev is not installed
  echo omitt the krb5 options if no kerberos libraries available
  ./config --prefix=/usr/local --openssldir=/usr/local/ssl \
      enable-zlib zlib zlib-dynamic enable-ssl2 \
      enable-krb5 --with-krb5-flavor=MIT \
      enable-mdc2 enable-md2  enable-rc5  enable-rc2 \
      enable-cms  enable-ec   enable-ec2m enable-ecdh enable-ecdsa \
      enable-gost enable-seed enable-idea enable-camellia \
      enable-rfc3779 enable-ec_nistp_64_gcc_128 \
      experimental-jpake -fPIC \
      -DTEMP_GOST_TLS -DTLS1_ALLOW_EXPERIMENTAL_CIPHERSUITES \
      shared
  echo == make binaries and libraries
  make depend
  make
  make test
  make install
  echo == if you want static binaries and libraries
  make clean
  echo same ./config as before but without shared option
  ./config --prefix=/usr/local --openssldir=/usr/local/ssl \
      enable-zlib zlib zlib-dynamic enable-ssl2 \
      enable-krb5 --with-krb5-flavor=MIT \
      enable-mdc2 enable-md2 enable-rc5 enable-rc2 \
      enable-cms  enable-ec   enable-ec2m enable-ecdh enable-ecdsa \
      enable-gost enable-seed enable-idea enable-camellia \
      enable-rfc3779 enable-ec_nistp_64_gcc_128 \
      experimental-jpake -fPIC \
      -DTEMP_GOST_TLS -DTLS1_ALLOW_EXPERIMENTAL_CIPHERSUITES
  make depend
  make
  make test
  echo next make will overwrite the previously installed dynamic
  echo shared openssl binary with the static openssl binary
  make install
Example: Compile Net::SSLeay
To enable support for ancient protocol versions, Net::SSLeay must be
compiled manually after patching 'SSLeay.xs' (see below).
Reason is, that Net::SSLeay enables some functionality for SSL/TLS
according the identified openssl version. There is, currently (2015),
no possibility to enable this functionality by passing options on to
the configuration script perl Makefile.PL.
   echo == unpack tarball
   tar xf Net-SSLeay-1.72.tar.gz
   cd Net-SSLeay-1.72
   echo == patch files
   echo "edit SSLeay.xs and change some #if as described below"
   env OPENSSL_PREFIX=/usr/local perl Makefile.PL PREFIX=/usr/local \
         INC=/usr/local/include  DEFINE=-DOPENSSL_BUILD_UNSAFE=1
   make
   make install
   cd /tmp && o-saft.pl +version
SSLeay.xs needs to be changed as follows:
  • search for
   #ifndef OPENSSL_NO_SSL2
   #if OPENSSL_VERSION_NUMBER < 0x10000000L
 
   const SSL_METHOD *
   SSLv2_method()
 
   #endif
   #endif
 
   #ifndef OPENSSL_NO_SSL3
   #if OPENSSL_VERSION_NUMBER < 0x10002000L

   const SSL_METHOD *
   SSLv3_method()

   #endif
   #endif
  • and replace by
   const SSL_METHOD *
   SSLv2_method()

   const SSL_METHOD *
   SSLv3_method()
Note that Net::SSLeay will be installed in /usr/local/ then. This
can be adapted to your needs by passing another path to the PREFIX
and DESTDIR parameter.
Following command can be used to check which methods are avilable in
Net::SSLeay, hence above patches can be verified:
    perl -MLNet::SSLinfo -le print Net::SSLinfo::ssleay_test();
Testing OpenSSL
After installation as descibed above finished, openssl may be tested:
   echo already installed openssl (found with PATH environment)
   openssl ciphers -v
   openssl ciphers -V -ssl2
   openssl ciphers -V -ssl3
   openssl ciphers -V ALL
   openssl ciphers -V ALL:COMPLEMENTOFALL
   openssl ciphers -V ALL:eNULL:EXP
   echo own compiled and installed openssl 
   /usr/local/openssl ciphers -v
   /usr/local/openssl ciphers -V -ssl2
   /usr/local/openssl ciphers -V -ssl3
   /usr/local/openssl ciphers -V ALL
   /usr/local/openssl ciphers -V ALL:COMPLEMENTOFALL
   /usr/local/openssl ciphers -V ALL:eNULL:EXP

The difference should be obvious. Note, the commands using ALL:COMPLEMENTOFALL and ALL:eNULL:EXP should return the same result.

Testing Net::SSLeay
As we want to test the separately installed Net::SSLeay, it is best
to do it with o-saft.pl itself:
   o-saft.pl +version
we should see a line similar to follwong at the end of the output:
   Net::SSLeay   1.72  /usr/local/lib/x86_64-linux-gnu/perl/5.20.2/Net/SSLeay.pm
Now check for supported (known) ciphers:
   o-saft.pl ciphers -V
we should see lines similar to those of the last /usr/local/openssl
call. However, it should contain more cipher lines.
Stand-alone Executable
Some people asked for a stand-alone executable (mainly for Windows).
Even Perl is a scripting language there are situations where a stand-
alone executable would be nice, for example if the installed perl and
its libraries are outdated, or if perl is missing at all.
Currently (2016) there are following possibilities to generate such a
stand-alone executable:
  • perl with PAR::Packer module
     pp -C -c o-saft.pl
     pp -C -c o-saft.pl -M Net::DNS -M Net::SSLeay -M IO::Socket \
                        -M Net::SSLinfo -M Net::SSLhello -M osaft
     pp -C -c checkAllCiphers.pl
     pp -C -c checkAllCiphers.pl -M Net::DNS
  • ActiveState perl with its perlapp
     perlapp --clean o-saft.pl
     perlapp --clean o-saft.pl -M Net::DNS -M Net::SSLeay -M IO::Socket \
                 -M Net::SSLinfo -M Net::SSLhello -M osaft
     perlapp --clean checkAllCiphers.pl
     perlapp --clean checkAllCiphers.pl -M Net::DNS -M osaft
  • perl2exe from IndigoSTar
     perl2exe o-saft.pl
     perl2exe checkAllCiphers.pl
For details on building the executable, for example how to include
all required modules, please refer to the documentation of the tool.
Note that pre-build executables (build by perlapp, perl2exe) cannot
be provided due to licence problems.
Also note that using stand-alone executable have not been tested the
same way as the o-saft.pl itself. Use them at your own risk.

DOCKER

The tool can be used inside a Docker image. To start o-saft.pl inside
the Docker image, use following:
  o-saft-docker +info some.tld
or
  docker run --rm -it owasp/o-saft +info some.tld
For more details, please refer to:
  o-saft-docker -help
  o-saft-docker usage

BUILD DOCKER IMAGE

The Docker image can be installed as follows:
  docker pull owasp/o-saft
The image can also easily be build from the Dockerfile (which is part
of the distribution) as follows:
  o-saft-docker build
To build the image from the Dockerfile with docker commands, see:
  o-saft-docker -n build
For more details, please refer to:
  o-saft-docker -help

SEE ALSO

HACKER's INFO

Note on SSL versions
Automatically detecting the supported SSL versions of the underlaying
system is a hard job and not always possible. Reasons could be:
  • used Perl modules (Socket::SSL, Net::SSLeay) does not handle errors
properly. Erros may be:
  invalid SSL_version specified at ... IO/Socket/SSL.pm
  Use of uninitialized value in subroutine entry at lib/IO/Socket/SSL.pm
  • the underlaying libssl does not support the version, which then may
result in segmentation fault
  • the underlaying libssl is newer than the Perl module and the module
has not been reinstalled. This most often happens with Net::SSLeay
This can be detected with (see version numbers for Net::SSLeay):
   o-saft.pl +version
  • perl (in particular a used module, see above) may bail out with a
compile error, like
   Can't locate auto/Net/SSLeay/CTX_v2_new.al in @INC ...
We try to detect unsupported versions and disable them automatically,
a warning like follwoing is shown then:
   **WARNING: SSL version SSLv2 not supported by openssl
If problems occour with SSL versions, following commands and options
may help to to get closer to the reason or can be used as workaround:
   o-saft.pl +version
   o-saft.pl +version | grep versions
   o-saft.pl +version | grep 0x
   o-saft.pl +protocols your.tld
   o-saft.pl +protocols your.tld --no-rc
If problems occour with SSL versions, following commands and options
Checking for SSL version is done at one place in the code, search for
    supported SSL versions
Using private libssl.so and libcrypt.so
For all cryptographic functionality the libraries installed on the
system will be used. This is in particular Perl's Net:SSLeay module,
the system's libssl.so and libcrypt.so and the openssl executable.
It is possible to provide your own libraries, if the P module and
the executable are linked using dynamic shared objects (aka shared
library, position independent code).
The appropriate option is --lib=PATH .
On most systems these libraries are loaded at startup of the program.
The runtime loader uses a preconfigured list of directories where to
find these libraries. Also most systems provide a special environment
variable to specify additional paths to directories where to search
for libraries, for example the LD_LIBRARY_ variable.
This is the default environment variable used herein. If your system
uses another name it must be specified with the --envlibvar=NAME
option, where NAME is the name of the environment variable.
Understanding --exe=PATH, --lib=PATH, --openssl=FILE
If any of --exe=PATH or --lib=PATH is provided, the pragram calls
(exec) itself recursively with all given options, except the option
itself. The environment variables LD_LIBRARY_PATH and PATH are
set before executing as follows:
  • prepend PATH with all values given with --exe=PATH
  • prepend LD_LIBRARY_PATH with all values given with --lib=PATH
This is exactly, what Cumbersome Approach below describes. So these
option simply provide a shortcut for that.
Note that --openssl=TOOL is a full path to the openssl executable
and will not be changed. However, if it is a relative path, it might
be searched for using the previously set PATH (see above).
Note that LD_LIBRARY_PATH is the default. It can be changed with
the --envlibvar=NAME option.
While --exe mainly impacts the openssl executable, --lib also
impacts o-saft.pl itself, as it loads other shared libraries if found.
Bear in mind that all these options can affect the behaviour of the
openssl subsystem, influencing both which executable is called and
which shared libraries will be used.
NOTE that no checks are done if the options are set proper. To verify
the settings, following commands may be used:
   o-saft.pl --lib=YOU-PATH --exe=YOUE-EXE +version
   o-saft.pl --lib=YOU-PATH --exe=YOUE-EXE --v +version
   o-saft.pl --lib=YOU-PATH --exe=YOUE-EXE --v --v +version


Why so many options? Exactly as described above, these options allow
the users to tune the behaviour of the tool to their needs. A common
use case is to enable the use of a separate openssl build independent
of the openssl package used by the operating system. This allows the
user fine grained control over openssl's encryption suites which are
compiled/available, without affecting the core system.
Caveats
Depending on your system and the used modules and executables, it can
be tricky to replace the configured shared libraries with own ones.
Reasons are:
a) the linked library name contains a version number,
b) the linked library uses a fixed path,
c) the linked library is searched at a predefined path,
d) the executable checks the library version when loaded.
Only the first one a) can be circumvented. The last one d) can often
be ignored as it only prints a warning or error message.
To circumvent the "name with version number" problem try following:
  • 1. use ldd (or a similar tool) to get the names used by openssl:
ldd /usr/bin/openssl
which returns something like:
libssl.so.0.9.8 => /lib/libssl.so.0.9.8 (0x00007f940cb6d000)
libcrypto.so.0.9.8 => /lib/libcrypto.so.0.9.8 (0x00007f940c7de000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f940c5d9000)
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f940c3c1000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f940c02c000)
/lib64/ld-linux-x86-64.so.2 (0x00007f940cdea000)
Here only the first two libraries are important. Both, libcrypto.so
and libssl.so need to be version "0.9.8" (in this example).
  • 2. create a directory for your libraries, i.e.:
mkdir /tmp/dada
  • 3. place your libraries there, assuming they are:
/tmp/dada/libssl.so.1.42
/tmp/dada/libcrypto.so.1.42
  • 4. create symbolic links in that directory:
ln -s libssl.so.1.42 libssl.so.0.9.8
ln -s libcrypto.so.1.42 libcrypto.so.0.9.8
  • 5. test program with following option:
   o-saft.pl +libversion --lib=/tmp/dada
   o-saft.pl +list --v   --lib=/tmp/dada
or:
   o-saft.pl +libversion --lib=/tmp/dada -exe=/path/to-openssl
   o-saft.pl +list --v   --lib=/tmp/dada -exe=/path/to-openssl
  • 6. start program with your options, i.e.:
   o-saft.pl --lib=/tmp/dada +ciphers
This works if openssl(1) uses the same shared libraries as
Net:SSLeay(3pm), which most likely is the case.
It's tested with Unix/Linux only. It may work on other platforms also
if they support such an environment variable and the installed
Net::SSLeay(3pm) and openssl(1) are linked using dynamic shared
objects.
Depending on compile time settings and/or the location of the used
tool or lib, a warning like following may occur:
  WARNING: can't open config file: /path/to/openssl/ssl/openssl.cnf
This warning can be ignored, usually as req or ca sub commands of
openssl is not used here.
To fix the problem, either use --openssl-cnf=FILE option or set the
the environment variable OPENSSL_CONF properly.
Cumbersome Approach
A more cumbersome approach to call this program is to set following
environment variables in your shell:
  PATH=/tmp/dada-1.42/apps:$PATH
  LD_LIBRARY_PATH=/tmp/dada-1.42
Windows Caveats
I.g. the used libraries on Windows are libeay32.dll and ssleay32.dll.
Windows also supports the LD_LIBRARY_PATH environment variable. If it
does not work as expected with that variable, it might be possible to
place the libs in the same directory as the corresponding executable
(which is found by the PATH environment variable).
Using CGI mode
This script can be used as CGI application. Output is the same as in
common CLI mode, using 'Content-Type:text/plain'. Keep in mind that
the used modules like Net::SSLeay will write some debug messages
on STDERR instead STDOUT. Therefore multiple --v and/or --trace
options behave slightly different.
No additional external files like RC-FILE or DEBUG-FILE are read
in CGI mode; they are silently ignored.
Some options are disabled in CGI mode because they are dangerous or
don't make any sense.
WARNING
There are no input data validation checks implemented herein. All
input data is url-decoded once and then used verbatim.
More advanced checks must be done outside before calling this tool.
It's not recommended to run this tool in CGI mode.
You have been warned!
Using user specified code
There are some functions called within the program flow, which can be
filled with any Perl code. Empty stubs of the functions are prepared
in o-saft-usr.pm. See also USER-FILE.

DEBUG

Debugging, Tracing
Following options and commands are useful for hunting problems with
SSL connections and/or this tool. Note that some options can be given
multiple times to increase amount of listed information. Also keep in
mind that it's best to specify --v as very first argument.
Note that the file o-saft-dbx.pm is required, if any --trace*
or --v option is used.
Commands
  • +dump
  • +libversion
  • +s_client
  • +todo
  • +version
Options
  • --v
  • --v--
  • --trace
  • --trace-arg
  • --trace-cmd
  • --trace-key
Empty or undefined strings are written as <<undefined>> in texts.
Some parameters, in particular those of HTTP responses, are written
as <<response>>. Long parameter lists are abbreviated with ....
Output
When using --v and/or --trace options, additional output will
be prefixed with a # (mainly as first, left-most character.
Following formats are used:
  • #[space]
Addition text for verbosity (--v options).
  • #[variable name][TAB]
Internal variable name (--trace-key options).
  • #o-saft.pl::
  • #Net::SSLinfo::
Trace information for --trace options.
  • #{
Trace information from NET::SSLinfo for --trace options.
These are data lines in the format: #{ variable name : value #}
Note that value here can span multiple lines and ends with #}
Using outdated modules
The tools was designed to work with old Perl modules too. When using
old modules, a proper **WARNING: will be printed. These warinings
cannot be switched of using --no-warning .
The warning also informs about the missing functionality or check.
I.g. it is best to install newer versions of the module if possible.
A good practice to check if modules are available in a proper version
is to call:
 o-saft.pl +version
 o-saft.pl +version --v --v
Following example shows the result without warnings:
     === reading: ./.o-saft.pl (RC-FILE done) ===
     === reading: Net/SSLhello.pm (O-Saft module done) ===
     === reading: Net/SSLinfo.pm (O-Saft module done) ===
     === ./o-saft.pl 16.09.09 ===
         Net::SSLeay::
            ::OPENSSL_VERSION_NUMBER()    0x268443744
            ::SSLeay()                    0x268443744
         Net::SSLeay::SSLeay_version()    OpenSSL 1.0.2-chacha (1.0.2f-dev)
     = openssl =
         version of external executable   OpenSSL 1.0.2-chacha (1.0.2f-dev)
         external executable              /opt/openssl-chacha/bin/openssl
         used environment variable (name) LD_LIBRARY_PATH
         environment variable (content)   <<undef>>
         path to shared libraries         
         full path to openssl.cnf file    <<undef>>
         common openssl.cnf files         /usr/lib/ssl/openssl.cnf \
                                          /etc/ssl/openssl.cnf \
                                          /System//Library/OpenSSL/openssl.cnf \
                                          /usr/ssl/openssl.cnf
         URL where to find CRL file       <<undef>>
         directory with PEM files for CAs /opt/tools/openssl-chacha/ssl/certs
         PEM format file with CAs         /etc/ssl/certs/ca-certificates.crt
         common paths to PEM files for CAs /etc/ssl/certs /usr/lib/certs \
                                           /System/Library/OpenSSL
         common PEM filenames for CAs     ca-certificates.crt \
                                          certificates.crt certs.pem
         number of supported ciphers      177
         openssl supported SSL versions   SSLv3 TLSv1 TLSv11 TLSv12
         o-saft.pl known SSL versions     SSLv2 SSLv3 TLSv1 TLSv11 TLSv12 TLSv13 \
                                          DTLSv09 DTLSv1 DTLSv11 DTLSv12 DTLSv13
     = o-saft.pl +cipherall =
         default list of ciphers          0x03000000 .. 0x030000FF, 0x0300C000 .. 0x0300C0FF, \
                                          0x0300CC00 .. 0x0300CCFF, 0x0300FE00 .. 0x0300FFFF,
                                          
     = Required (and used) Modules =
         @INC                 ./ ./lib . /bin /usr/share/perl5 \
                              /usr/lib/x86_64-linux-gnu/perl5/5.20 \
                              /usr/lib/x86_64-linux-gnu/perl/5.20 \
                              /usr/share/perl/5.20 /usr/local/lib/site_perl .
     =   module name            VERSION  found in
     =   ----------------------+--------+------------------------------------------
         IO::Socket::INET       1.35     /usr/lib/x86_64-linux-gnu/perl/5.20/IO/Socket/INET.pm
         IO::Socket::SSL        2.002    /usr/share/perl5/IO/Socket/SSL.pm
         Net::DNS               0.81     /usr/lib/x86_64-linux-gnu/perl5/5.20/Net/DNS.pm
         Net::SSLeay            1.72     /usr/lib/x86_64-linux-gnu/perl5/5.20/Net/SSLeay.pm
         Net::SSLinfo           16.06.01 Net/SSLinfo.pm
         Net::SSLhello          16.05.16 Net/SSLhello.pm
         osaft                  16.05.10 osaft.pm
Following example shows the result with warnings:
     === reading: ./.o-saft.pl (RC-FILE done) ===
     === reading: ./Net/SSLhello.pm (O-Saft module done) ===
     **WARNING: ancient Net::SSLeay 1.35 < 1.49; cannot use ::initialize at /Net/SSLinfo.pm line 481.
     === reading: ./Net/SSLinfo.pm (O-Saft module done) ===
     **WARNING: ancient perl has no 'version' module; version checks may not be accurate; at o-saft.pl line 1662.
     **WARNING: ancient Net::SSLeay 1.35 < 1.49 detected; at o-saft.pl line 1687.
     **WARNING: ancient IO::Socket::SSL 1.22 < 1.37 detected; at o-saft.pl line 1687.
     **WARNING: ancient version IO::Socket::SSL 1.22 < 1.90 does not support SNI or is known to be buggy; SNI disabled; at o-saft.pl line 5905.
     !!Hint: --force-openssl can be used to disables this check
     **WARNING: ancient version Net::SSLeay 1.35 < 1.49  may throw warnings and/or results may be missing; at o-saft.pl line 5934.
     **WARNING: SSL version 'TLSv11': not supported by Net::SSLeay; not checked
     **WARNING: SSL version 'TLSv12': not supported by Net::SSLeay; not checked
     **WARNING: SSL version 'TLSv13': not supported by Net::SSLeay; not checked
     === o-saft.pl 16.09.09 ===
         Net::SSLeay::
            ::OPENSSL_VERSION_NUMBER()    0x9470143
     **WARNING: ancient version Net::SSLeay 1.35 < 1.49; cannot compare SSLeay with openssl version at o-saft.pl line 4778.
            ::SSLeay()                    0x1.35
     **WARNING: ancient version Net::SSLeay 1.35 < 1.49; detailed version not available at o-saft.pl line 4806.
     = openssl =
         version of external executable   OpenSSL 0.9.8y 5 Feb 2013
         external executable              /usr/bin/openssl
         used environment variable (name) LD_LIBRARY_PATH
         environment variable (content)   <<undef>>
         path to shared libraries
         full path to openssl.cnf file    <<undef>>
         common openssl.cnf files         /usr/lib/ssl/openssl.cnf \
                                          /etc/ssl/openssl.cnf \
                                          /System//Library/OpenSSL/openssl.cnf \
                                          /usr/ssl/openssl.cnf
         URL where to find CRL file       <<undef>>
         directory with PEM files for CAs /System/Library/OpenSSL/certs
         PEM format file with CAs         <<undef>>
         common paths to PEM files for CAs /etc/ssl/certs /usr/lib/certs /System/Library/OpenSSL
         common PEM filenames for CAs     ca-certificates.crt certificates.crt certs.pem
         number of supported ciphers      43
         openssl supported SSL versions   SSLv2 SSLv3 TLSv1
         o-saft.pl known SSL versions     SSLv2 SSLv3 TLSv1 TLSv11 TLSv12 TLSv13 \
                                          DTLSv09 DTLSv1 DTLSv11 DTLSv12 DTLSv13
     **WARNING: ancient version Net::SSLeay 1.35 < 1.49; cannot compare SSLeay with openssl version at o-saft.pl line 4778.
     **WARNING: used openssl version '9470143' differs from compiled Net:SSLeay '1.35'; ignored
     = o-saft.pl +cipherall =
         default list of ciphers          0x03000000 .. 0x030000FF, 0x0300C000 .. 0x0300C0FF,
                                          0x0300CC00 .. 0x0300CCFF, 0x0300FE00 .. 0x0300FFFF,
     = Required (and used) Modules =
         @INC                 ./ ./lib /bin /Library/Perl/Updates/5.10.0 \
                              /System/Library/Perl/5.10.0/darwin-thread-multi-2level \
                              /System/Library/Perl/5.10.0 \
                              /Library/Perl/5.10.0/darwin-thread-multi-2level \
                              /Library/Perl/5.10.0 \
                              /Network/Library/Perl/5.10.0/darwin-thread-multi-2level \
                              /Network/Library/Perl/5.10.0 \
                              /Network/Library/Perl \
                              /System/Library/Perl/Extras/5.10.0/darwin-thread-multi-2level \
                              /System/Library/Perl/Extras/5.10.0 .
     =   module name            VERSION  found in
     =   ----------------------+--------+------------------------------------------
         IO::Socket::INET       1.31     /System/Library/Perl/5.10.0/darwin-thread-multi-2level/IO/Socket/INET.pm
         IO::Socket::SSL        1.22     /System/Library/Perl/Extras/5.10.0/IO/Socket/SSL.pm
         Net::DNS               0.65     /System/Library/Perl/Extras/5.10.0/darwin-thread-multi-2level/Net/DNS.pm
         Net::SSLeay            1.35     /System/Library/Perl/Extras/5.10.0/darwin-thread-multi-2level/Net/SSLeay.pm
         Net::SSLinfo           16.06.01 ./Net/SSLinfo.pm
         Net::SSLhello          16.05.16 ./Net/SSLhello.pm
         osaft                  16.05.10 /osaft.pm
Please keep in mind that the shown version numbers and the shown line
numbers are examples and may differ on your system.
When starting o-saft.pl with outdated modules, more **WARNING: will
be shown. The warnings depend on the installed version of the module.
o-saft.pl is known to work with at least:
  • IO::Socket::INET 1.31, IO::Socket::SSL 1.22, Net::DNS 0.66, Net::SSLeay 1.30

TESTING

When talking about "testing the tool", functionl tests are meant. So
this section describes "developer" rather than "user" options.
Testing the tool is a challenging task. Beside the oddities described
elsewhere, for example Name Rodeo, there are a bunch of problems
and error which may occour during runtime.
Makefiles are used for testing functionality and code quality during
development. These tests are implemented in the ./t/ directory, see
the Makefile.* there.
Following options and commands for o-saft.pl are available to improve
testing. They mainly can simulate error conditions or stop execution
properly (they are not intended for other use cases):
+quit
Stop execution after processing all arguments and before precessing
any target. The runtime configuration is complete at this point.
--exit=KEY
Terminate o-saft.pl at specified KEY. For available KEY please see:
   o-saft.pl --help=exit
   grep exit= o-saft.pl
--cfg-init=KEY=VALUE
With this option values in the internal  %cfg hash can be set:
   $cfg{KEY} = VALUE
Only (perl) scalars or arrays can be set. The type will be detected
automatically.
Example, this option can be used to change the text used as prefix
in each output line triggerd by the --v option:
   o-saft.pl --cfg-init=prefix_verbose="#VERBOSE: "
or the text used as prefix triggerd by the --trace option:
   o-saft.pl --cfg-init=prefix_trace="#TRACE: "
--v
Print more information about checks.
--trace
Print debugging messages.
For more details, please see Options for tracing and debugging .
Internal testing
Following options and commands for o-saft.pl are for internal testing.
They provide informations about internal data structures and alike.
See also tests in t/Makefile* .
These options behave like the command +quit and do not perform any
checks on the target(s).
--test-data
Print overview of all available commands and checks.
--test-maps
Print internal data strucures %cfg{openssl}, %cfg{ssleay}.
--test-prot
Print internal data according protocols.
--test-regex
Print results for applying various texts to defined regex.
--test-subs
Print formatted list of internal functions with their description.
Not to be intended in conjunction with any target check.
--test-cipher-list
Print list of hex keys of known ciphers.
--test-cipher-show
Print complete list of ciphers.
--test-cipher-sorted
Print list of ciphers sorted according strength.

EXAMPLES

($0 in all following examples is the name of the tool)
General
   o-saft.pl +cipher some.tld
   o-saft.pl +info   some.tld
   o-saft.pl +check  some.tld
   o-saft.pl +quick  some.tld
   o-saft.pl +help=commands
   o-saft.pl +list
   o-saft.pl +list --v
   o-saft.pl +certificate  some.tld
   o-saft.pl +fingerprint  some.tld 444
   o-saft.pl +after +dates some.tld
Some Specials
  • Get an idea how messages look like
   o-saft.pl +check --cipher=RC4 some.tld
  • Check for Server Name Indication (SNI) usage only
   o-saft.pl +sni some.tld
  • Check for SNI and print certificate's subject and altname
   o-saft.pl +sni +cn +altname some.tld
  • Check for all SNI, certificate's subject and altname issues
   o-saft.pl +sni_check some.tld
  • Only print supported ciphers
   o-saft.pl +cipher --enabled some.tld
  • Only print unsupported ciphers
   o-saft.pl +cipher --disabled some.tld
  • Test for a specific ciphers
   o-saft.pl +cipher --cipher=ADH-AES256-SHA some.tld
  • Test all ciphers, even if not supported by local SSL implementation
   o-saft.pl +cipherraw some.tld
   o-saft.pl +cipherall some.tld
   o-saft.pl +cipherall some.tld --range=full
   checkAllCiphers.pl example.tld --range=full --v
  • Show supported (enabled) ciphers with their DH parameters:
   o-saft.pl +cipher-dh some.tld
  • Test using a private libssl.so, libcrypto.so and openssl
   o-saft.pl +cipher --lib=/foo/bar-1.42 --exe=/foo/bar-1.42/apps some.tld
  • Test using a private openssl
   o-saft.pl +cipher --openssl=/foo/bar-1.42/openssl some.tld
  • Test using a private openssl also for testing supported ciphers
   o-saft.pl +cipher --openssl=/foo/bar-1.42/openssl --force-openssl some.tld
  • Show current score settings
   o-saft.pl --help=score
  • Change a single score setting
   o-saft.pl --cfg_score=http_https=42   +check some.tld 
  • Use your private score settings from a file
   o-saft.pl --help=score > magic.score
# edit as needed: magic.score
   o-saft.pl --cfg_score    magic.score  +check some.tld
  • Use your private texts in output
   o-saft.pl +check some.tld --cfg_text=desc=my special description
  • Use your private texts from RC-FILE
   o-saft.pl --help=cfg_text >> .o-saft.pl
# edit as needed: .o-saft.pl
   o-saft.pl +check some.tld
  • Use your private hint texts in output
   o-saft.pl +check some.tld --cfg-hint=renegotiation="my special hint text"
  • Get the certificate's Common Name for a bunch of servers:
   o-saft.pl +cn example.tld some.tld other.tld
   o-saft.pl +cn example.tld some.tld other.tld --showhost --no-header
  • Generate simple parsable output
   o-saft.pl --legacy=quick --no-header +info  some.tld
   o-saft.pl --legacy=quick --no-header +check some.tld
   o-saft.pl --legacy=quick --no-header --trace-key +info  some.tld
   o-saft.pl --legacy=quick --no-header --trace-key +check some.tld
  • Generate simple parsable output for multiple hosts
   o-saft.pl --legacy=quick --no-header --trace-key --showhost +check some.tld other.tld
  • Just for curiosity
   o-saft.pl some.tld +fingerprint --format=raw
   o-saft.pl some.tld +certificate --format=raw | openssl x509 -noout -fingerprint
Testing with exit code
  • Test SSL/TLS connection and return exit code
   o-saft.pl +check  --exitcode  some.tld
  • Test ciphers and return exit code with details about exit code
   o-saft.pl +cipher --exitcode --exitcode-v  some.tld
  • Test ciphers and return exit code for ciphers only
   o-saft.pl +cipher --exitcode --exitcode-no-prot  some.tld
  • Test with exit code but avoid checks considered 'yes' even if 'no'
   o-saft.pl +check  --exitcode --ignore-out=ev- --ignore-out=rfc_7525 some.tld
Specials for hunting problems with connections etc.
  • Show command line argument processing
   o-saft.pl +info some.tld --trace-arg
  • Simple tracing
   o-saft.pl +cn   some.tld --trace
   o-saft.pl +info some.tld --trace
  • A bit more tracing
   o-saft.pl +cn   some.tld --trace --trace
  • Show internal variable names in output
   o-saft.pl +info some.tld --trace-key
  • Show internal argument processeing
   o-saft.pl +info --trace-arg some.tld
  • Show internal control flow
   o-saft.pl +info some.tld --trace-cmd
  • Show internal timing
   o-saft.pl +info some.tld --trace-time
  • Show checking ciphers
   o-saft.pl +cipher some.tld --v --v
  • Show values retrieved from target certificate directly
   o-saft.pl +info some.tld --no-cert --no-cert --no-cert-text=Value-from-Certificate
  • Show certificate CA verifications
   o-saft.pl some.tld +chain_verify +verify +error_verify +chain
  • Avoid most performance and timeout problems (don't use --v)
   o-saft.pl +info some.tld --no-dns --no-sni --ignore-no-conn
   o-saft.pl +info some.tld --no-dns --no-sni --no-cert --no-http --no-openssl
  • Identify timeout problems
   o-saft.pl +info some.tld --trace-cmd

this will show lines containing:

    #O-Saft  CMD: test ...

DOCUMENTATION

User Documentation
Documentation is mainly intented for the user, which is provided with
 o-saft.pl --help
But it may be difficult to find the proper information there. To get
more selective documentations, the --help=* options can be used. To
get an overview which --help=* options are available, use:
 o-saft.pl --help=HELP
This only provides the complete user documentation, or the well known
parts specified by the keyword, (HELP in example above). To find any
text with some lines of context, following could be used:
 o-saft.pl --help | egrep -i -C 3 "some text"
This is simply avaiable with:
 o-saft -help="some text"
In the GUI a more sophisticate search is implemented, see the "Help"
window there:
 o-saft.tcl
Developer Documentation
Documentation for developers is provided in various ways. Information
for developers can be found found in:
  • the files itself
  • with: o-saft.pl --help=HELP
  • using: make

ATTRIBUTION

Based on ideas (in alphabetical order) of:
cnark.pl, SSLAudit.pl sslscan, ssltest.pl, sslyze.py, testssl.sh
O-Saft - OWASP SSL advanced forensic tool
Thanks to Gregor Kuznik for this title.
cipherraw and most proxy functionality implemented by Torsten Gigler.
For re-writing some docs in proper English, thanks to Robb Watson.
Code to check heartbleed vulnerability adapted from
Steffen Ullrich (08. April 2014):
https://github.com/noxxi/p5-scripts/blob/master/check-ssl-heartbleed.pl
Colouration inspired by https://testssl.sh/ .

AUTHOR

Achim Hoffmann

VERSION

@(#) 19.09.19

Content of this wiki page generated with:

o-saft.pl --no-warning --no-header --help=gen-wiki