Feature Proposal: Transparent upgrade of crypt() algorithms

[A.J. Kehoe IV (Nanoman)]

Allan Jude wrote:

[...]

>Honestly, my use case is just silently upgrading the strength of the
>hashing algorithm (when combined with my other feature request).
>Updating my bcrypt hashes from $2a$04$ to $2b$12$ or something. Same
>applies for the default sha512, maybe I want to update to rounds=15000

Like this?

http://www.freebsd.org/cgi/query-pr.cgi?pr=182518

Request for comments:

http://docs.freebsd.org/cgi/mid.cgi?20140106205156.GD4903

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