Date: Fri, 15 Jul 2011 23:31:41 +0000 (UTC) From: Donovan <contact.newangels@...il.com> To: john-users@...ts.openwall.com Subject: Re: sha1(md5($pass) Solar Designer <solar@...> writes: > > > These are supported in recent -jumbo, but you need to specify the > --format='md5_gen(23)' option, and not all builds will recognize it. > Specifically, -x86-64 builds of 1.7.8-jumbo-2 don't, whereas 32-bit x86 > and "make generic" builds do. > > Since you say you're using an existing Universal Binary build for a Mac, > you may have to explicitly invoke its 32-bit component using: > > arch -i386 ./john --format='md5_gen(23)' pw > > but I don't know/recall if that older version supports md5_gen(23) at > all or not, in any of its builds. Maybe not, in which case you'd need > to build and use a newer version instead. > > > That's not what you need. This syntax is for certain trivial kinds of > salted SHA-1 hashes, with no MD5 involved. > > > Here's how these are loaded by a "make generic" build of 1.7.8-jumbo-2 > on a Linux/x86-64 system (no 32-bit gcc/glibc/openssl, which is why I > had to use "generic" in this case): > > $ ./john --format='md5_gen(23)' pw > Loaded 5 password hashes with no different salts ( md5_gen(23): sha1(md5($p)) [64x2 (MD5_Body)]) > > To test that this works right, I generated the following hash: > > 4028a0e356acc947fcd2bfbf00cef11e128d484a > > The corresponding password gets cracked: > > $ ./john --format='md5_gen(23)' pw-test > Loaded 1 password hash ( md5_gen(23): sha1(md5($p)) [64x2 (MD5_Body)]) > test (?) > guesses: 1 time: 0:00:00:04 DONE (Sat Jul 16 02:40:28 2011) c/s: 29.29 trying: 12345 - barney > Use the "--show" option to display all of the cracked passwords reliably > > There's some slowness at startup, though - but with your 5 hashes the > speed increased to a reasonable level (millions c/s) after a while. > > Alexander > > Hello Alexander, Thank you so much to take the time to help me & share your precious advices, really appreciated.. Ok, i understand all perfectly....i am going to try & come back to repport. Well, concern the Erik version, i think this one ( Jumbo 12 ) seem supported the md5_gen...i allready use for VB hashes., & if not i have to build an new one for Mac. Thanks again ! Best Regards, Donovan
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