text: #include<stdio.h>
  #include<string.h>
  #include<openssl/md5.h>
  
  int md5 = 0;
  unsigned char result[MD5_DIGEST_LENGTH];
  char* string = "asdfasdf";
  
  int main(int argc, char** argv) {
  	MD5(string, strlen(string), result);
  
  	for(md5 = 0; md5 < MD5_DIGEST_LENGTH; md5++) {
  		printf("%02x", result[md5]);
  	}
  	printf("\n");
  }
  