mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-11-27 11:20:58 +01:00
446 lines
11 KiB
C
446 lines
11 KiB
C
/*
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* Copyright (c) 1997 Robert Nordier
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <fts.h>
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#include <md5.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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extern int crc(int fd, uint32_t *cval, off_t *clen);
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#define DISTMD5 1 /* MD5 format */
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#define DISTINF 2 /* .inf format */
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#define DISTTYPES 2 /* types supported */
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#define E_UNKNOWN 1 /* Unknown format */
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#define E_BADMD5 2 /* Invalid MD5 format */
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#define E_BADINF 3 /* Invalid .inf format */
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#define E_NAME 4 /* Can't derive component name */
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#define E_LENGTH 5 /* Length mismatch */
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#define E_CHKSUM 6 /* Checksum mismatch */
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#define E_ERRNO 7 /* sys_errlist[errno] */
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#define isfatal(err) ((err) && (err) <= E_NAME)
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#define NAMESIZE 256 /* filename buffer size */
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#define MDSUMLEN 32 /* length of MD5 message digest */
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#define isstdin(path) ((path)[0] == '-' && !(path)[1])
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static const char *opt_dir; /* where to look for components */
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static const char *opt_name; /* name for accessing components */
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static int opt_all; /* report on all components */
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static int opt_ignore; /* ignore missing components */
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static int opt_recurse; /* search directories recursively */
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static int opt_silent; /* silent about inaccessible files */
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static int opt_type; /* dist type: md5 or inf */
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static int opt_exist; /* just verify existence */
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static int ckdist(const char *path, int type);
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static int chkmd5(FILE * fp, const char *path);
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static int chkinf(FILE * fp, const char *path);
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static int report(const char *path, const char *name, int error);
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static const char *distname(const char *path, const char *name,
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const char *ext);
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static const char *stripath(const char *path);
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static int distfile(const char *path);
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static int disttype(const char *name);
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static int fail(const char *path, const char *msg);
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static void usage(void);
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int
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main(int argc, char *argv[])
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{
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static char *arg[2];
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struct stat sb;
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FTS *ftsp;
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FTSENT *f;
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int rval, c, type;
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while ((c = getopt(argc, argv, "ad:in:rst:x")) != -1)
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switch (c) {
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case 'a':
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opt_all = 1;
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break;
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case 'd':
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opt_dir = optarg;
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break;
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case 'i':
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opt_ignore = 1;
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break;
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case 'n':
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opt_name = optarg;
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break;
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case 'r':
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opt_recurse = 1;
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break;
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case 's':
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opt_silent = 1;
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break;
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case 't':
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if ((opt_type = disttype(optarg)) == 0) {
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warnx("illegal argument to -t option");
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usage();
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}
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break;
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case 'x':
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opt_exist = 1;
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break;
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc < 1)
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usage();
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if (opt_dir) {
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if (stat(opt_dir, &sb))
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err(2, "%s", opt_dir);
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if (!S_ISDIR(sb.st_mode))
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errx(2, "%s: not a directory", opt_dir);
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}
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rval = 0;
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do {
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if (isstdin(*argv))
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rval |= ckdist(*argv, opt_type);
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else if (stat(*argv, &sb))
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rval |= fail(*argv, NULL);
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else if (S_ISREG(sb.st_mode))
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rval |= ckdist(*argv, opt_type);
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else {
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arg[0] = *argv;
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if ((ftsp = fts_open(arg, FTS_LOGICAL, NULL)) == NULL)
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err(2, "fts_open");
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while ((f = fts_read(ftsp)) != NULL)
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switch (f->fts_info) {
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case FTS_DC:
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rval = fail(f->fts_path, "Directory causes a cycle");
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break;
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case FTS_DNR:
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case FTS_ERR:
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case FTS_NS:
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rval = fail(f->fts_path, sys_errlist[f->fts_errno]);
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break;
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case FTS_D:
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if (!opt_recurse && f->fts_level > FTS_ROOTLEVEL &&
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fts_set(ftsp, f, FTS_SKIP))
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err(2, "fts_set");
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break;
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case FTS_F:
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if ((type = distfile(f->fts_name)) != 0 &&
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(!opt_type || type == opt_type))
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rval |= ckdist(f->fts_path, type);
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break;
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default: ;
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}
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if (errno)
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err(2, "fts_read");
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if (fts_close(ftsp))
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err(2, "fts_close");
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}
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} while (*++argv);
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return rval;
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}
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static int
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ckdist(const char *path, int type)
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{
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FILE *fp;
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int rval, c;
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if (isstdin(path)) {
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path = "(stdin)";
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fp = stdin;
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} else if ((fp = fopen(path, "r")) == NULL)
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return fail(path, NULL);
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if (!type) {
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if (fp != stdin)
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type = distfile(path);
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if (!type)
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if ((c = fgetc(fp)) != EOF) {
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type = c == 'M' ? DISTMD5 : c == 'P' ? DISTINF : 0;
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(void)ungetc(c, fp);
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}
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}
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switch (type) {
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case DISTMD5:
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rval = chkmd5(fp, path);
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break;
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case DISTINF:
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rval = chkinf(fp, path);
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break;
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default:
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rval = report(path, NULL, E_UNKNOWN);
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}
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if (ferror(fp))
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warn("%s", path);
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if (fp != stdin && fclose(fp))
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err(2, "%s", path);
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return rval;
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}
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static int
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chkmd5(FILE * fp, const char *path)
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{
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char buf[298]; /* "MD5 (NAMESIZE = MDSUMLEN" */
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char name[NAMESIZE + 1];
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char sum[MDSUMLEN + 1], chk[MDSUMLEN + 1];
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const char *dname;
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char *s;
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int rval, error, c, fd;
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char ch;
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rval = 0;
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while (fgets(buf, sizeof(buf), fp)) {
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dname = NULL;
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error = 0;
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if (((c = sscanf(buf, "MD5 (%256s = %32s%c", name, sum,
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&ch)) != 3 && (!feof(fp) || c != 2)) ||
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(c == 3 && ch != '\n') ||
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(s = strrchr(name, ')')) == NULL ||
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strlen(sum) != MDSUMLEN)
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error = E_BADMD5;
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else {
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*s = 0;
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if ((dname = distname(path, name, NULL)) == NULL)
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error = E_NAME;
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else if (opt_exist) {
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if ((fd = open(dname, O_RDONLY)) == -1)
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error = E_ERRNO;
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else if (close(fd))
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err(2, "%s", dname);
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} else if (!MD5File(dname, chk))
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error = E_ERRNO;
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else if (strcmp(chk, sum))
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error = E_CHKSUM;
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}
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if (opt_ignore && error == E_ERRNO && errno == ENOENT)
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continue;
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if (error || opt_all)
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rval |= report(path, dname, error);
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if (isfatal(error))
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break;
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}
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return rval;
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}
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static int
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chkinf(FILE * fp, const char *path)
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{
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char buf[30]; /* "cksum.2 = 10 6" */
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char ext[3];
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struct stat sb;
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const char *dname;
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off_t len;
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u_long sum;
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intmax_t sumlen;
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uint32_t chk;
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int rval, error, c, pieces, cnt, fd;
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char ch;
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rval = 0;
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for (cnt = -1; fgets(buf, sizeof(buf), fp); cnt++) {
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fd = -1;
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dname = NULL;
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error = 0;
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if (cnt == -1) {
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if ((c = sscanf(buf, "Pieces = %d%c", &pieces, &ch)) != 2 ||
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ch != '\n' || pieces < 1)
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error = E_BADINF;
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} else if (((c = sscanf(buf, "cksum.%2s = %lu %jd%c", ext, &sum,
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&sumlen, &ch)) != 4 &&
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(!feof(fp) || c != 3)) || (c == 4 && ch != '\n') ||
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ext[0] != 'a' + cnt / 26 || ext[1] != 'a' + cnt % 26)
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error = E_BADINF;
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else if ((dname = distname(fp == stdin ? NULL : path, NULL,
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ext)) == NULL)
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error = E_NAME;
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else if ((fd = open(dname, O_RDONLY)) == -1)
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error = E_ERRNO;
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else if (fstat(fd, &sb))
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error = E_ERRNO;
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else if (sb.st_size != (off_t)sumlen)
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error = E_LENGTH;
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else if (!opt_exist) {
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if (crc(fd, &chk, &len))
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error = E_ERRNO;
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else if (chk != sum)
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error = E_CHKSUM;
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}
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if (fd != -1 && close(fd))
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err(2, "%s", dname);
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if (opt_ignore && error == E_ERRNO && errno == ENOENT)
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continue;
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if (error || (opt_all && cnt >= 0))
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rval |= report(path, dname, error);
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if (isfatal(error))
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break;
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}
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return rval;
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}
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static int
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report(const char *path, const char *name, int error)
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{
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if (name)
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name = stripath(name);
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switch (error) {
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case E_UNKNOWN:
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printf("%s: Unknown format\n", path);
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break;
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case E_BADMD5:
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printf("%s: Invalid MD5 format\n", path);
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break;
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case E_BADINF:
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printf("%s: Invalid .inf format\n", path);
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break;
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case E_NAME:
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printf("%s: Can't derive component name\n", path);
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break;
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case E_LENGTH:
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printf("%s: %s: Size mismatch\n", path, name);
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break;
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case E_CHKSUM:
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printf("%s: %s: Checksum mismatch\n", path, name);
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break;
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case E_ERRNO:
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printf("%s: %s: %s\n", path, name, sys_errlist[errno]);
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break;
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default:
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printf("%s: %s: OK\n", path, name);
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}
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return error != 0;
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}
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static const char *
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distname(const char *path, const char *name, const char *ext)
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{
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static char buf[NAMESIZE];
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size_t plen, nlen;
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char *s;
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if (opt_name)
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name = opt_name;
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else if (!name) {
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if (!path)
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return NULL;
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name = stripath(path);
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}
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nlen = strlen(name);
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if (ext && nlen > 4 && name[nlen - 4] == '.' &&
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disttype(name + nlen - 3) == DISTINF)
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nlen -= 4;
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if (opt_dir) {
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path = opt_dir;
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plen = strlen(path);
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} else
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plen = path && (s = strrchr(path, '/')) != NULL ?
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(size_t)(s - path) : 0;
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if (plen + (plen > 0) + nlen + (ext ? 3 : 0) >= sizeof(buf))
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return NULL;
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s = buf;
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if (plen) {
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memcpy(s, path, plen);
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s += plen;
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*s++ = '/';
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}
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memcpy(s, name, nlen);
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s += nlen;
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if (ext) {
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*s++ = '.';
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memcpy(s, ext, 2);
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s += 2;
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}
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*s = 0;
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return buf;
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}
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static const char *
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stripath(const char *path)
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{
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const char *s;
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return ((s = strrchr(path, '/')) != NULL && s[1] ?
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s + 1 : path);
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}
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static int
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distfile(const char *path)
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{
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const char *s;
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int type;
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if ((type = disttype(path)) == DISTMD5 ||
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((s = strrchr(path, '.')) != NULL && s > path &&
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(type = disttype(s + 1)) != 0))
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return type;
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return 0;
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}
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static int
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disttype(const char *name)
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{
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static const char dname[DISTTYPES][4] = {"md5", "inf"};
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int i;
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for (i = 0; i < DISTTYPES; i++)
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if (!strcmp(dname[i], name))
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return 1 + i;
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return 0;
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}
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static int
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fail(const char *path, const char *msg)
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{
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if (opt_silent)
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return 0;
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warnx("%s: %s", path, msg ? msg : sys_errlist[errno]);
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return 2;
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}
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static void
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usage(void)
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{
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fprintf(stderr,
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"usage: ckdist [-airsx] [-d dir] [-n name] [-t type] file ...\n");
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exit(2);
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}
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