MD5 example code with openssl

MD5:

what is MD5:

MD5 message-digest algorithm with hash value of 16 bytes(128 bit).

RFC link: http://tools.ietf.org/html/rfc1321

Designed by : R. Rivest

Calculation MD5 for a string.

#include <stdio.h>

#include <string.h>

#include "openssl/md5.h"

#pragma comment(lib,"libeay32.lib")

#pragma comment(lib,"ssleay32.lib")

// 16 bytes =  16 * 8 ( 128 bits)

#define PRINT_HASH 33

int main()

{

    unsigned char digest[MD5_DIGEST_LENGTH];

    char string[] = "blogger";

  

    MD5((unsigned char*)&string, strlen(string), (unsigned char*)&digest);  

    printf("the function prints  %s  \t  unreadable value\n",digest);

    char convertedString[PRINT_HASH];

    printf("prints hash value in unsigned decimal\n");

    for(int i = 0; i < MD5_DIGEST_LENGTH; i++)

        printf("%u ",(unsigned int)digest[i]);

    printf("\n");

    printf(" Hexa Demical 16 byte hash value  for string %s  is : ",string);

     for (int i = 0; i < 16; i++)

     printf ("%02x", digest[i]);

  

    return 0;

}