ESAPI Encryption

Feature Overview

TODO

Possible Enhancements

• Potentially rename Seal and Unseal to better describe what they do
• seal() should include an HMAC or integrity check to ensure that the encrypted data has not been tampered with (see CWE-649). (NOTE: By default, ESAPI crypto already ensures message authenticity and seal() uses that, so this likely would be redundant. -Kevin W. Wall)

• The API should include support for key rotation; indicated key used for encryption of data

• The API should allow key management to be externalized, to allow developers to integrate their own key management strategies (such as a PKI).

• The documentation for each method should indicate whether it is designed to protect integrity, confidentiality, or both; and whether it is suitable for encrypting transient items (such as hidden form fields) or is designed for long-term storage.

• Get rid of JavaEncryptor as a singleton. It causes numerous problems and makes some things impossible if one wishes to only interact with it through the Encryptor interface level.

• Make it simpler to use different cipher algorithms or key sizes for symmetric encryption. This requires a major kludge today that is not at all thread safe without explicit locks. (It was so bad in fact, that the method to support this kludge was immediately deprecated!)

• Change sign() / validateSignature() so they can use persistent asymmetric keys and store public / private keys used with asymmetric crypto operations in a PKCS#12 or JKS key store.

• Create separate properties file for ESAPI crypto properties. Name it "ESAPI-Encryptor.properties" or something similar. (Google Issue #48.)

• Provide tamper-evident logging using cryptographic primitives as well as mechanism to verify that logs produced in such a manner have not been tampered with.1

• Support for encrypting files.

• Support for format perserving encryption. (See [1] and [2])