204 }

   205 

   206 /** Convert the hexadecimal string representation to a binary md5sum

   207  * @param md5sum where to put the md5sum into

   208  * @param buf buffer containing a string of 32 hex chars

   209  * @return 0 on success, -1 on failure */

   210 int StringToMd5sum(uint8 md5sum[16], const char *buf)

   211 {

   212     char hex[3] = { 0, 0, 0};

   213     char *invalid;

   214 

   215 	for (uint i = 0; i < 16; i++) {

   216         hex[0] = buf[i * 2 + 0];

   217         hex[1] = buf[i * 2 + 1];

   218 

   219         md5sum[i] = strtol(hex, &invalid, 16);

   220 

   221         if (*invalid)

   222             return -1;

   223 	}

   224 

   225 	return 0;