MD5 C++ Mysql

ofada · 04-13-2004, 09:52 AM

Hello
I'm using mysql++ to communicate with a database in C++ and I what to know how to crypt a password in C++ to compare it with the one stored in the mysql database.

Thanks a lot
Bye !!

deiussum · 04-13-2004, 10:45 AM

Off the top of my head, I can think of a couple of options.

1. Use the MD5 function that is part of the OpenSSL crypto library. (man MD5 if you have OpenSSL installed)

2. Use the MD5 function that MySQL has, like so:
SELECT * FROM Users
WHERE Username='someusername' AND
Password=MD5('somepassword')

ofada · 04-13-2004, 02:28 PM

OK,
Can you tell me a piece of C/C++ code using the functions of crypto library, because i don't understand how does it work.
Thanks

deiussum · 04-13-2004, 03:00 PM

Code:

// md5test.c
#include <openssl/md5.h>
#include <stdio.h>

int main()
{
    unsigned char hash[16];
    char* pass = "password";
    int c;

    MD5(pass, strlen(pass), hash);

    printf("0x");
    for (c=0;c<16;c++)
    {
        printf("%.2X", hash[c]);
    }
    printf("\n");
}

Code:

$ gcc -o md5test md5test.c -lcrypto
$ ./md5test
0x5F4DCC3B5AA765D61D8327DEB882CF99