Date: Wed, 04 Apr 2012 00:23:17 +0200 From: magnum <john.magnum@...hmail.com> To: john-dev@...ts.openwall.com Subject: RAR OpenCL committed to git I have struggled to get better performance but I need a break now and possibly someone else may help out so I have now pushed the new RAR format to git. On a GTX580, it currently does around 4000 c/s in -hp mode (cRARk OpenCL does ~5500 c/s using same card). I got it to 4500 c/s by moving GPU arrays to __local memory but then the self-test fails (although no warnings from building etc - I hate that) and I have no idea what is wrong. On an old 9600GT, I get 290 c/s. There seem to be one or two hard-to-find bugs in there (like very occasionally failing self-tests, even in CPU mode). And memory leaks, I believe the latter is in the inflate code, taken from libclamav. Other things to note: - This format is NOT a new one - OpenCL support is added to the one same format if building for gpu. As a "result" of this, it has support for "reverting" to CPU for Single mode or other situations where we can not fill a batch with desired number of keys per crypt. This behavior is disabled as delivered but seem to work fine. The downside is that we currently don't get the GPU code self-tested if enabled (this is why it's disabled). - Non-hp-mode performance is still poor (but much better). This will be addressed later, I have some ideas. cRARk can attack -p mode with more or less the same speed as -hp so there must be a way to achieve this for us too. - AES-NI is used if your hardware and OpenSSL version features it. - Only the AES key & IV generation runs in GPU currently. Building with OMP does make sense. - Added inline storing of RAR data in input file when small enough. - Added lots of self-tests (including -p mode and -m0 ones). Default to use same length test vectors as cRARk. - Changed format tag from $rar3$ to $RAR3$ to enforce re-running rar2john. - Moved slow code from set_salt() to get_salt() and then keep the allocations during the whole run. magnum
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