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Bram Matthys 7dcb5a5bb1 The authentication types 'md5', 'sha1' and 'ripemd160' have been
deprecated because they can be cracked at high speeds. They still
work, but a warning will be shown on boot and on rehash.
Please use 'bcrypt' or (even better) the new 'argon2' type instead:
"./unrealircd mkpasswd argon2" or "/mkpasswd argon2 passwd" on IRC.

Also, not in release notes because it would take up too much text:
Unix crypt is a bit more complicated: most types are outright 'bad',
while other types have reasonable security similar to 'bcrypt'.
To be honest these people should probably use 'argon2' since it's
a lot better. Then again, warning about this when it's still such
a common hashing method (now, in 2018) may be a bit overzealous.
So: not warning about crypt types $5/$6 which use SHA256/SHA512
with normally at least 5000 rounds (unless deliberately weakened
by the user), but we do warn about other crypt() usage.

Also, mkpasswd support for those deprecated types has been removed since
there's no good reason to generate new password hashes with these.
2018-12-10 15:46:11 +01:00
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