Date: Wed, 10 Jul 2013 15:11:49 +0200 From: magnum <john.magnum@...hmail.com> To: john-dev@...ts.openwall.com Subject: Re: PBKDF2 hash_out treatment On 10 Jul, 2013, at 14:19 , marcus.desto <marcus.desto@...pl> wrote: > I think I have found the problem. > > It is the salt size. My reference input contained a salt with size 32. As I switched to 4 (your test input), the opencl implementation worked well with pyopencl. > > Now. I tried different lengths of salt. Finally, I can confirm, that pbkdf2_hmac_sha1_unsplit_kernel.cl produces wrong hashes since length of the input salt string is >23. That is odd. Off the top of my head it should work fine with salt length up to 51 or something like that. > I would like to mention that I did not convert the input strings to UTF-8. For an ASCII salt, UTF-8 encoding is exactly the same as the ASCII. Only 8-bit characters (0x80 and above) will result in a different UTF-8 string. I will have a look at this within 24h or so unless someone else finds the problem. magnum
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