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/** \ingroup signature.c
* \file lib/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 "system.h"
#include "md5.h"
/**
* Calculate MD5 sum for file.
* @param fn file name
* @retval digest address of md5sum
* @param asAscii return md5sum as ascii string?
* @param brokenEndian calculate broken MD5 sum?
* @return 0 on success, 1 on error
*/
static int domd5(const char * fn, unsigned char * digest, int asAscii,
int brokenEndian) {
unsigned char buf[1024];
unsigned char bindigest[16];
FILE * fp;
MD5_CTX ctx;
int n;
memset(bindigest, 0, sizeof(bindigest));
fp = fopen(fn, "r");
if (!fp) {
return 1;
}
rpmMD5Init(&ctx, brokenEndian);
while ((n = fread(buf, 1, sizeof(buf), fp)) > 0)
rpmMD5Update(&ctx, buf, n);
rpmMD5Final(bindigest, &ctx);
if (ferror(fp)) {
fclose(fp);
return 1;
}
if (!asAscii) {
memcpy(digest, bindigest, 16);
} else {
sprintf(digest, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"
"%02x%02x%02x%02x%02x",
(unsigned)bindigest[0],
(unsigned)bindigest[1],
(unsigned)bindigest[2],
(unsigned)bindigest[3],
(unsigned)bindigest[4],
(unsigned)bindigest[5],
(unsigned)bindigest[6],
(unsigned)bindigest[7],
(unsigned)bindigest[8],
(unsigned)bindigest[9],
(unsigned)bindigest[10],
(unsigned)bindigest[11],
(unsigned)bindigest[12],
(unsigned)bindigest[13],
(unsigned)bindigest[14],
(unsigned)bindigest[15]);
}
fclose(fp);
return 0;
}
int mdbinfile(const char *fn, unsigned char *bindigest) {
return domd5(fn, bindigest, 0, 0);
}
int mdbinfileBroken(const char *fn, unsigned char *bindigest) {
return domd5(fn, bindigest, 0, 1);
}
int mdfile(const char *fn, unsigned char *digest) {
return domd5(fn, digest, 1, 0);
}
int mdfileBroken(const char *fn, unsigned char *digest) {
return domd5(fn, digest, 1, 1);
}
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