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#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include "md5/global.h"
#include "md5/md5.h"
#include "base64.h"
#include "md5.h"
#include "error.h"
#undef MD5_SHOW_ERRORS
/* md5_digest_file - Calculate MD5 digest of a file.
*
* Args:
* path - Path of file to hash.
*
* Returns:
* string containing the digest on success, "" on failure
*/
char *md5_digest_file(const char *path) {
unsigned char c[MD5_DIGEST_LENGTH];
FILE *fp;
int bytes;
unsigned char data[1024 * 64];
static char digest[MD5_DIGEST_LENGTH * 2 + 1];
MD5_CTX context;
fp = fopen(path, "rb");
if (fp == NULL) {
#ifdef MD5_SHOW_ERRORS
error("md5_digest_file: unable to open %s for reading: %s",
path,
strerror(errno));
#endif /* MD5_SHOW_ERRORS */
return NULL;
}
MD5Init(&context);
while ((bytes = fread(data, 1, sizeof(data), fp)) != 0)
MD5Update(&context, data, bytes);
MD5Final(c, &context);
fclose(fp);
snprintf(digest, sizeof(digest),
"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
c[0], c[1], c[2], c[3], c[4],
c[5], c[6], c[7], c[8], c[9],
c[10], c[11], c[12], c[13], c[14],
c[15]);
return digest;
}
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