125 lines
2.9 KiB
C
125 lines
2.9 KiB
C
/** \ingroup signature.c
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* \file lib/md5sum.c
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* Generate/check MD5 Message Digests.
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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 "system.h"
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#include "md5.h"
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#include "rpmio_internal.h"
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#include "debug.h"
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/**
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* Calculate MD5 sum for file.
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* @param fn file name
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* @retval digest address of md5sum
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* @param asAscii return md5sum as ascii string?
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* @param brokenEndian calculate broken MD5 sum?
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* @return 0 on success, 1 on error
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*/
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static int domd5(const char * fn, unsigned char * digest, int asAscii,
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int brokenEndian)
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{
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int rc;
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#ifndef DYING
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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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memset(bindigest, 0, sizeof(bindigest));
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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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rpmMD5Init(&ctx, brokenEndian);
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while ((rc = fread(buf, sizeof(buf[0]), sizeof(buf), fp)) > 0)
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rpmMD5Update(&ctx, buf, rc);
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rpmMD5Final(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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if (!asAscii) {
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memcpy(digest, bindigest, 16);
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} else {
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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%02x",
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(unsigned)bindigest[0],
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(unsigned)bindigest[1],
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(unsigned)bindigest[2],
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(unsigned)bindigest[3],
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(unsigned)bindigest[4],
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(unsigned)bindigest[5],
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(unsigned)bindigest[6],
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(unsigned)bindigest[7],
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(unsigned)bindigest[8],
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(unsigned)bindigest[9],
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(unsigned)bindigest[10],
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(unsigned)bindigest[11],
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(unsigned)bindigest[12],
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(unsigned)bindigest[13],
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(unsigned)bindigest[14],
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(unsigned)bindigest[15]);
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}
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fclose(fp);
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rc = 0;
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#else
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FD_t fd = Fopen(fn, "r.ufdio");
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unsigned char buf[BUFSIZ];
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unsigned char * md5sum = NULL;
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size_t md5len;
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if (fd == NULL || Ferror(fd)) {
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if (fd)
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Fclose(fd);
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return 1;
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}
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/* Preserve legacy "brokenEndian" behavior. */
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fdInitMD5(fd, (brokenEndian ? RPMDIGEST_NATIVE : 0) );
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while ((rc = Fread(buf, sizeof(buf[0]), sizeof(buf), fd)) > 0)
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;
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fdFiniMD5(fd, (void **)&md5sum, &md5len, 1);
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if (Ferror(fd))
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rc = 1;
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Fclose(fd);
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if (!rc)
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memcpy(digest, md5sum, md5len);
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if (md5sum)
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free(md5sum);
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#endif
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return rc;
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}
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int mdbinfile(const char *fn, unsigned char *bindigest) {
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return domd5(fn, bindigest, 0, 0);
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}
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int mdbinfileBroken(const char *fn, unsigned char *bindigest) {
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return domd5(fn, bindigest, 0, 1);
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}
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int mdfile(const char *fn, unsigned char *digest) {
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return domd5(fn, digest, 1, 0);
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}
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int mdfileBroken(const char *fn, unsigned char *digest) {
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return domd5(fn, digest, 1, 1);
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}
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