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From "Felix Kaser (JIRA)" <>
Subject [jira] [Commented] (CODEC-182) Allow real salts in Sha2Crypt
Date Wed, 26 Feb 2014 06:17:20 GMT


Felix Kaser commented on CODEC-182:

I understand your inclination. It is definitely the easier choice. But I don't like the inconsistencies
it introduces.

The javadoc for Crypt.crypt() actually explains it really well.

What about sanity checks? Should it be possible to enter a salt that starts with $5$ for SHA512?
I think one of the best ways would be to avoid using the Sha2 class at all but go through
Crypt.crypt() which selects the implementation based on the salt prefix.

> Allow real salts in Sha2Crypt
> -----------------------------
>                 Key: CODEC-182
>                 URL:
>             Project: Commons Codec
>          Issue Type: Bug
>    Affects Versions: 1.9
>            Reporter: Felix Kaser
>            Priority: Minor
> The javadoc for all the methods in Sha2Crypt clearly states to pass a "real salt" in
as parameter, without prefix and without "rounds=...". But the crypt method first of all checks
if the salt matches a regex pattern, which requires it to contain at least a leading $5$ or
$6$, possibly a rounds=... and then the real salt.
> Imho either the javadoc should be adapted to tell developers which salt to pass in, or
the crypt method should match the salt after adding the prefix itself.
> I am new to the apache commons community, so please correct me if I'm totally wrong here.

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