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[Solved] Help With MD5 Key Encryption.
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pkedpker
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PostPosted: Mon Nov 03, 2008 10:41 pm    Post subject: Reply with quote

Also without much cracking I could just find

Code:


if LCase(md5Test.DigestStrToHexStr(TxtKey.text)) = "24407d308f312e21b4af74389c4dd011" Then




guessing I could find 24407d308f312e21b4af74389c4dd011 using a hex editor and overwrite that hash with a custom hash to meet my password.. and program would be cracked without much patching in my opinion.

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Took a test lol
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nog_lorp
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PostPosted: Tue Nov 04, 2008 12:34 am    Post subject: Reply with quote

Snootae wrote:
the pseudocode is essentially exactly what you have to fucking do


Egads man, don't implement the hashing algorithm for yourself! One tiny mistake and it all tumbles down in potentially non-obvious but exploitable ways. Use the public highly-tested cryptography libraries.

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Noz3001
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PostPosted: Tue Nov 04, 2008 2:04 am    Post subject: Reply with quote

nog_lorp wrote:
Snootae wrote:
the pseudocode is essentially exactly what you have to fucking do


Egads man, don't implement the hashing algorithm for yourself! One tiny mistake and it all tumbles down in potentially non-obvious but exploitable ways. Use the public highly-tested cryptography libraries.


Yeah, lol. Example of that here: http://forum.cheatengine.org/viewtopic.php?p=2953604#2953604
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oib111
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PostPosted: Tue Nov 04, 2008 9:19 am    Post subject: Reply with quote

pkedpker wrote:
Also without much cracking I could just find

Code:


if LCase(md5Test.DigestStrToHexStr(TxtKey.text)) = "24407d308f312e21b4af74389c4dd011" Then




guessing I could find 24407d308f312e21b4af74389c4dd011 using a hex editor and overwrite that hash with a custom hash to meet my password.. and program would be cracked without much patching in my opinion.


Except for the fact that any smart programmer wouldn't do that, but that's a great way of getting through bad security Laughing

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