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/*
* md5sum.c - Generate/check MD5 Message Digests
*
* Compile and link with md5.c. If you don't have getopt() in your library
* also include getopt.c. For MSDOS you can also link with the wildcard
* initialization function (wildargs.obj for Turbo C and setargv.obj for MSC)
* so that you can use wildcards on the commandline.
*
* Written March 1993 by Branko Lankester
* Modified June 1993 by Colin Plumb for altered md5.c.
* Modified October 1995 by Erik Troan for RPM
*/
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include "md5.h"
#include "messages.h"
int mdfile(char *fn, unsigned char *digest) {
unsigned char buf[1024];
unsigned char bindigest[16];
FILE * fp;
MD5_CTX ctx;
int n;
fp = fopen(fn, "r");
if (!fp) {
return 1;
}
MD5Init(&ctx);
while ((n = fread(buf, 1, sizeof(buf), fp)) > 0)
MD5Update(&ctx, buf, n);
MD5Final(bindigest, &ctx);
if (ferror(fp)) {
fclose(fp);
return 1;
}
sprintf(digest, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"
"%02x%02x%02x%02x%02x",
bindigest[0], bindigest[1], bindigest[2], bindigest[3],
bindigest[4], bindigest[5], bindigest[6], bindigest[7],
bindigest[8], bindigest[9], bindigest[10], bindigest[11],
bindigest[12], bindigest[13], bindigest[14], bindigest[15]);
fclose(fp);
return 0;
}
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