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Date: Mon, 20 Aug 2012 03:35:02 +0200
From: Szabolcs Nagy <nsz@...t70.net>
To: musl@...ts.openwall.com
Subject: Re: Help-wanted tasks for musl
* Rich Felker <dalias@...ifal.cx> [2012-08-19 20:51:28 -0400]:
> The characters '=', '-', and '$' are not valid in salt, are they?
> My preference would be to reject anything that looks like a setting
> but actually gets treated as salt, rather than hashing it in some
> implementation-specific way that leads to buggy, non-portable password
> hashes.
>
it's not clear what the acceptable characters are..
originally the [a-zA-Z0-9./] is the base64 set used
but the implementations tend to accept anything for salt
(it will go through some hash or encryption function
anyway, the only exception is '$' which is a separator
around the salt and maybe the characters used by the
passwd file format)
otherwise i'd rather be more strict with the input than
deal with weird corner cases, but i don't know what are
the practices (ie rejecting '=' or '-' is reasonable or not)
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