md5

Sam 2006

how can i get the md5 hash of something in mfc

Christian Graus

google - there are plenty of MD5 examples available online. Christian Graus - Microsoft MVP - C++

Sam 2006

thats what i am doing write now... but all i am finding is forums about ppl asking what php's md5() function is for...

Christian Graus

First hit[^] You need to think about what you type into google. I typed md5 C++ source code. md5 by itself would obviously get a lot of other hits. Christian Graus - Microsoft MVP - C++

Jorgen Sigvardsson

Any set of C functions would integrate nicely with MFC. Here's[^] one C-implementation. All you have to do is to copy'n'paste, and you're set.

char text[] = "your text here";
md5_context ctx;
md5_starts(&ctx);
md5_update(&ctx, (unsigned char*)text, sizeof(text));
unsigned char md5hash[16];
md5_finish(&ctx, md5hash);

There you go! Please note that the contents of md5hash will be in binary format. It's not a string, it's an array of exactly 16 bytes. If you need to convert it into a string, then you'll have to do something like this:

char hashtext[33];
for(int i = 0; i < 16; ++i) {
unsigned char hinibble = ((md5hash[i] & 0xF0) >> 4);
unsigned char lonibble = md5hash[i] & 0xF;
hashtext[i * 2] = hinibble >= ? (hinibble - 10) + 'A' : hinibble + '0';
hashtext[i * 2 + 1] = lonibble >= ? (lonibble - 10) + 'A' : lonibble + '0';
}
hashtext[32] = 0; // terminate string

hashtext will now contain the hash on a hexadecimal form. Also note that the input can be any kind of data, it doesn't have to be text! Any byte chunk would do. Good music: In my rosary[^]

Jim Howard

I've had an md5 implementation here on Codeproject for years and years. It works fine, although its pretty old fashioned code. There are several other MD5 examples here. You can also use the MS Crypto API, look up the documentation for CryptCreateHash in Platform SDK.

logicaldna

you have some help on codeproject befor doing google always check codeproject http://www.codeproject.com/cpp/cryptest.asp Love is photogenic,It requires a dark to develope.