/*! \brief Compute MD5 checksum */
void compute_md5(char *dst, char *src, int src_len)
{
MD5_CTX context;
unsigned char digest[16];
MD5Init (&context);
MD5Update (&context, src, src_len);
U_MD5Final (digest, &context);
string2hex(digest, 16, dst);
}
/*! \brief
* Calculate a MD5 digest over a file.
* This function assumes 32 bytes in the destination buffer.
* \param dest destination
* \param file_name file for that the digest should be calculated
* \return zero on success, negative on errors
*/
static int MD5File(char *dest, const char *file_name)
{
MD5_CTX context;
FILE *input;
unsigned char buffer[32768];
unsigned char hash[16];
unsigned int counter, size;
struct stat stats;
if (!dest || !file_name) {
LM_ERR("invalid parameter value\n");
return -1;
}
if (stat(file_name, &stats) != 0) {
LM_ERR("could not stat file %s\n", file_name);
return -1;
}
size = stats.st_size;
MD5Init(&context);
if((input = fopen(file_name, "rb")) == NULL) {
LM_ERR("could not open file %s\n", file_name);
return -1;
}
while(size) {
counter = (size > sizeof(buffer)) ? sizeof(buffer) : size;
if ((counter = fread(buffer, 1, counter, input)) <= 0) {
fclose(input);
return -1;
}
U_MD5Update(&context, buffer, counter);
size -= counter;
}
fclose(input);
U_MD5Final(hash, &context);
string2hex(hash, 16, dest);
LM_DBG("MD5 calculated: %.*s for file %s\n", MD5_LEN, dest, file_name);
return 0;
}
/*!
* \brief Calculate a MD5 digests over a string array
*
* Calculate a MD5 digests over a string array and stores the result in the
* destination char array. This function assumes 32 bytes in the destination
* buffer.
* \param dst destination
* \param src string input array
* \param size elements in the input array
*/
void MD5StringArray (char *dst, str src[], int size)
{
MD5_CTX context;
unsigned char digest[16];
int i;
int len;
char *s;
MD5Init (&context);
for (i=0; i<size; i++) {
trim_len( len, s, src[i] );
if (len > 0)
MD5Update (&context, s, len);
}
U_MD5Final (digest, &context);
string2hex(digest, 16, dst );
DBG("DEBUG: MD5 calculated: %.*s\n", MD5_LEN, dst );
}
