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flat assembler > Projects and Ideas > MD5 Password Recovery Tool

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asmfan



Joined: 11 Aug 2006
Posts: 401
Location: Russian
weiss

+ idea!
- relization: doesn't work with "012345678";
- console input charset: cannot handle " " (blank space), "<", ">". Better file input;
-(very small) no gui version:\.

_________________
Any offers?
Post 09 Jun 2007, 08:20
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weiss



Joined: 03 Jan 2006
Posts: 25
Quote:
relization: doesn't work with "012345678";

that was a typo-error, the test was done with "0123456789" 10 characters.

in the code comments, i stated that the character set has to be divisible by 5, this is just a limitation of the program, doesn't mean you couldn't write a new version with support for any length.

Quote:
-(very small) no gui version:\.


its only experimental code, i didn't write it to distribute, just to satisfy my curiosity and show some people that using these methods is good way to utilize SIMD instructions for cracking passwords based on integer hashing lagorithms such as MD5.

the same ideas can be applied to algorithms like NTLM1,HMAC-MD5,FreeBSD/Apace MD5Crypt

using SIMD allows for 120% advantage over normal 32-bit code.
each letter of the character set is converted to 4 bytes at specific index.
these are used to update the SIMD password buffers by ADD'ing and reseting using AND's

i've not seen this done anywhere, and i think its atleast 1 good approach to efficiently using SIMD instructions to crack passwords, rather than use conventional byte operations, which are slow with SIMD.

the lengths are controlled using SUB's and conditional jump on flag, which is much faster than compare/conditional jump.

if i wrote a proper version, it would be a GUI, i might get around to it sometime, but in the meantime, you can do what you like with it, i wouldn't like to see people making money from it though.
Post 09 Jun 2007, 09:12
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
Post 09 Jun 2007, 13:50
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weiss



Joined: 03 Jan 2006
Posts: 25
i already did, its slower than normal 32-bit code.actually, i forwarded code to bartavelle couple of years ago using similar idea, and he didn't really pay any attention to it.same thing with author of mdcrack-sse and solar designer.
the only person to be interested so far has been author of passwords pro
Post 09 Jun 2007, 16:48
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