Linux下C基于openssl生成MD5的函数

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实现Linux下c字符串生成md5

 #include "stdio.h"
#include <string.h>
#include <stdlib.h>
#include <openssl/md5.h>
int  get_md5( char  *input, char  *output)
{
     char  password[1024*1024*5]={0};
     MD5_CTX x;
     int  i = 0, len;
     char  *out = NULL;
     unsigned  char  d[16];
     unsigned  char  tmp[128] = { 0 }; 
     strcpy (password,input);
     MD5_Init(&x);
     MD5_Update(&x, ( char  *)password,  strlen (password));
     MD5_Final(d, &x);
     out = ( char  *) malloc (35);
     memset (out, 0x00, 35);
     strcpy (out,  "$1$" );
    // printf("MD5(\"%s\") = ", password);
     for  (i = 0; i < 16; i++)
     {
         sprintf (out + (i*2),  "%02X" , d[i]);  // 转换为32位
     }
     out[32] = 0;
    // printf("%s\n", out);
     strcpy (output,out);
     free (out);
     return  0;
}