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