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aa.bb.cc

07-16-2010 04:58 AM

md5 checksum of a string

hello everyone

can anybody help me to get a code in c++ to find the md5 checksum of a string.
thanks in advance

bigearsbilly

07-16-2010 05:25 AM

Is there a C library on your system?
have you tried man -k md5?

on my BSD I have this:

Code:

    #include <sys/types.h>

    #include <sys/md5.h>



    void

    MD5Init(MD5_CTX *buf);



    void

    MD5Transform(u_int32_t buf[4], const unsigned char block[64]);

also
http://sourceforge.net/projects/libmd5-rfc/

google for RFC1321

aa.bb.cc

07-16-2010 06:07 AM

hey...
thankyou so much. i just want to know one more thing.what is the use of the parameter const unsigned char block[64]. i mean what will i send in the argument.

bigearsbilly

07-16-2010 08:11 AM

this works for me on FreeBSD.

(you need to specify the md5 library to link)
export LDLIBS=-lmd

Code:

#include <string.h>

#include <stdio.h>

#include <sys/types.h>

#include <md5.h>



int main(int argc, char * argv) {



    const char * p = "hello\n";

    char buffer[512];

    MD5Data((void *) p,  strlen(p), buffer);

    puts(buffer);



    return 0;

}

Code:

$ ./md5          

b1946ac92492d2347c6235b4d2611184

$ echo hello | md5

b1946ac92492d2347c6235b4d2611184

no error checking, no warranty ;)

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