Date: Thu, 02 Jun 2011 23:37:26 +0200 From: magnum <rawsmooth@...dband.net> To: john-dev@...ts.openwall.com Subject: Re: Re: adding PDF password cracking support to JtR [early alpha release] Don't be so submissive: Please move your stuff to the top of the wiki list when updating, this will help us seeing changes. I moved your patch to the top - that means you now r0ck ;-) (This scheme of things is arguable but noone has posted any different view so I reckon it's ok with everybody) magnum On 2011-06-02 23:25, Dhiru Kholia wrote: > Hi, > > Here is a new version of the patch (also uploaded to wiki) which > applies on top of john-1.7.7-jumbo-5. Thanks magnum for the quick > review and porting to jumbo-5 help. > > Usage Instructions: > > Apply the patch on top of john-1.7.7-jumbo-5. Run unpdf tool on > password protected pdf files. Run john on unpdf's output. > > Please note that sample password protected pdf files can be downloaded > from : http://openwall.info/wiki/john/sample-non-hashes > > $ ../run/john -test -format=pdf > Benchmarking: pdf [32/64]... DONE > Many salts: 12424 c/s real, 12424 c/s virtual > Only one salt: 19659 c/s real, 19659 c/s virtual > > This is for a pdf file protected using userpassword and using RC4 > 128-bit cipher. > pdfcrack used to achieve around 35K passwords/sec. I will profile > later on to see what is going on. > > $ ../run/john pdfdump # pdfdump is included in the patch > Loaded 4 password hashes with 4 different salts (pdf [32/64]) > testpassword (test-5-RC4-128-open-testpassword.pdf) > test (test-3-RC4-40-open-test.pdf) > testpassword (test-3-RC4-40-open-testpassword.pdf) > test (PDF-Example-Password.pdf) > > TODO: biggest item is adding support for Adobe 7 and later files which > use 128-bit AES and 256-bit AES ciphers. This will involve some > pdfparser.c hacking. Henning, any tips :-) ? >
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