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Socoder -> Cobra -> Attempting Cobra MD5 function |
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| Sun, 26 Aug 2007, 20:45 | |
HoboBen
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Hi, I'm trying to write a function to create MD5 hashes in Cobra. I've got the JavaScript MD5 source code (The C one was impossibly long!) And this excellent info too. Cobra can't yet take or return arrays with functions (though I have requested that), so a straight copy+paste hack job won't really work. It hasn't been too difficult to follow the general code behind the MD5 function, but in that second link, I don't really get this bit: What does that all mean, and how would I Cobra-ise it? I sorta have a grasp of how that bit works, but I don't know what it's for, either. What does "~" mean in C? How does the whole |&^~ thing work in the return part? Are these shorthand operations on some binary data or what? Finally, what's the difference between a hex or base-64 encoded string? Thank you, Hobo 
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| Mon, 27 Aug 2007, 02:55 | |
Afr0
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Never tried using MD5 myself, but based on that bit of code you posted, I can tell it appears to be equivalent to mathematical functions named F, G, H, I used in the algorithm. They are explained here under the section 'Algorithm'. As for the operators, I can give you the standard C names for most of them, but it's too early in the morning for me to bother to do any proper research into how they work in this particular case; & = Binary And (Can also be AddressOf, but doesn't seem to be in this case, since there aren't any pointers involved) | = Inclusive Or ^ = Exclusive Or (Also referred to as Xor for BASIC users) ~ = One's compliment - This operator is unary (requires one operand) and has the efect of 'flipping' bits. -=-=- Afr0 Games Project Dollhouse on Github - Please fork! 
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| Mon, 27 Aug 2007, 08:44 | |
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HoboBen
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Thanks Afro, That helps a fair bit I'll see if I have any luck. Cheers 
-=-=- blog | work | code | more code |
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