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john:tutorials:sha-crypt [2012/07/02 17:05]
solar updates for 1.7.9-jumbo-6
john:tutorials:sha-crypt [2012/07/02 17:27] (current)
solar removed the section on pre-1.7.6
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 As of this writing, the OpenCL code for sha512crypt is actually faster than the CUDA code, so it should be used on NVIDIA cards as well.  In fact, it's faster on NVIDIA than on AMD (even though it's the other way around for most other password hashes). ​ For example, it achieves about 11400 c/s (at the default of rounds=5000) on GTX 570 at 1600 MHz. As of this writing, the OpenCL code for sha512crypt is actually faster than the CUDA code, so it should be used on NVIDIA cards as well.  In fact, it's faster on NVIDIA than on AMD (even though it's the other way around for most other password hashes). ​ For example, it achieves about 11400 c/s (at the default of rounds=5000) on GTX 570 at 1600 MHz.
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-===== Pre-1.7.6 versions (why?!) ===== 
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-You probably want to use John the Ripper 1.7.6 or newer for this - please see above. ​ However, if you must: 
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-This topic was [[http://​www.openwall.com/​lists/​john-users/​2009/​09/​02/​3|brought up on john-users]],​ [[http://​www.openwall.com/​lists/​john-users/​2009/​11/​05/​1|got to YouTube]], and someone wrote [[http://​pka.engr.ccny.cuny.edu/​~jmao/​node/​26|a blog article on it]].  Please refer to the latter. 
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-It is not clear why the article proposes that the source files be edited manually instead of the [[:​john/​how-to-extract-tarballs-and-apply-patches|patch being applied]], so you may just do the latter. ​ The patch itself may be [[:​john/​patches|downloaded from this wiki]]. 
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-Also, if instructions from the article are followed "​literally",​ then the resulting ''​shadowfile''​ will possibly end up with mode 644 in a mode 755 home directory of a user - that is, readable to other users of the system used to crack/audit the passwords. ​ To prevent this from happening, ''​umask 077''​ should be issued before the ''​sudo unshadow ...''​ command. 
  
 Back to [[.|John the Ripper tutorials]]. Back to [[.|John the Ripper tutorials]].
john/tutorials/sha-crypt.txt ยท Last modified: 2012/07/02 17:27 by solar
 
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