What is this (C/C++) program doing?

Question

It's calling these API functions (advapi32.dll) with these parameters:

CryptCreateHash ( 3275488, 32771, 0, 0, 1243424 );
CryptHashData   ( 3203040, 'UY30930037661', 13, 0 );
CryptCreateHash ( 3276304, 32771, 0, 0, 46463812 );
CryptHashData   ( 3203296, '-585164138661', 10, 0 );
CryptCreateHash ( 3276304, 32771, 0, 0, 46463808 );
CryptHashData   ( 3203424, '1db17bd8ef8bcbd734424a9eae818907LOGIN OK³·óéB', 40, 0 );
CryptCreateHash ( 3276304, 32771, 0, 0, 46463808 );
CryptHashData   ( 3203296, '1db17bd8ef8bcbd734424a9eae818907HWHASH OK', 41, 0 );

Not sure how it would come to

1db17bd8ef8bcbd734424a9eae818907

Anyone have any ideas?

This isn't valid C or C++ code; it uses single-quotes for string. What is the actual working code? — Marcelo Cantos, Jun 15 '10 at 11:30
This isn't the source code, it's a log of API calls and their parameters from a program written in C++. — guitar-, Jun 15 '10 at 11:38
Have you checked the docs for those API calls on MSDN? If yes, what didn't you understand? — pdbartlett, Jun 15 '10 at 11:45

score 3 · Accepted Answer · answered Jun 15 '10 at 11:49

(see here:) The call to CryptCreateHash initiates hashing with MD5 (32771 = 0x8003): CALG_MD5 0x00008003 MD5 hashing algorithm.. And the call to CryptHashData hashes the second parameter (the one in quotes) using that hash object. I guess these long strings could be keys that are to be hashed before transmission over a network or something.

What is this (C/C++) program doing?

1 Answers1