Projects/Disable DES

An announcement has been sent to krbdev@mit.edu starting a review of this project. That review will conclude on 2009-02-13.

Comments can be sent to krbdev@mit.edu.

This project will disable the single-DES encryption algorithms by default. A future (post-1.7) release will remove the code that supports single-DES.

For now, the allow_weak_crypto libdefault boolean (which aligns with Heimdal) will control whether "weak" crypto is allowed. The crypto library will gain an internal API, krb5_c_weak_enctype(), which will indicate whether a given enctype is "weak". The krb5_keytypes structure will have a flags word that will contain a bit indicating whether a given enctype is weak.

In the future, in a separate project, in order to make this more future-proof, the configuration of enctypes will be enhanced to allow for inclusions and exclusions, e.g.

permitted_enctypes = DEFAULT +des-cbc-crc

or

permitted_enctypes = DEFAULT -arcfour-hmac

where DEFAULT designates the default set of enctypes.

Review

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