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3 points by akkartik 4182 days ago | link | parent

Yeah, I wrote some more code :)

First I transformed all existing hashes:

  (maptable [list 'sha512_sha1 (sha512 _)] hpasswords*)
Then, as users login and I momentarily have their unhashed passwords, I hash it with just sha512, making the hpasswords* value:

  (= hpasswords*.user
     (list 'sha512 (sha512 password)))
Password verification can now use the first element (the 'type') to decide how to hash the password.