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Date: Thu, 19 Jan 2012 17:05:43 -0500
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Subject: [Patch] Implement PBKDF2 in the Hash package
From: ircmaxell@gmail.com (Anthony Ferrara)

Hi all,

I've implemented a patch (attached to the bug, but in a gist as well
here https://gist.github.com/1641725 ) that implements a hash_pbkdf2()
function.  The patch also slightly refactors hash_hmac() to split out
a little bit of common functionality (since pbkdf2 relies upon hmac).

https://bugs.php.net/bug.php?id=60813

I've targeted the patch towards trunk for now, but I'd like to see if
it could get into 5.3 and 5.4 as well (in a point release).

Let me know your thoughts,

Thanks,

Anthony