usr.bin/cksum/cksum.c

   1 /*      $NetBSD: cksum.c,v 1.45 2011/08/29 14:12:29 joerg Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1991, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * James W. Williams of NASA Goddard Space Flight Center.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 /*-
  36  * Copyright (c) 1997 Jason R. Thorpe.  All rights reserved.
  37  *
  38  * This code is derived from software contributed to Berkeley by
  39  * James W. Williams of NASA Goddard Space Flight Center.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  * 3. All advertising materials mentioning features or use of this software
  50  *    must display the following acknowledgement:
  51  *      This product includes software developed by the University of
  52  *      California, Berkeley and its contributors.
  53  * 4. Neither the name of the University nor the names of its contributors
  54  *    may be used to endorse or promote products derived from this software
  55  *    without specific prior written permission.
  56  *
  57  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  58  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  59  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  60  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  61  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  62  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  63  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  64  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  65  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  66  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  67  * SUCH DAMAGE.
  68  */
  69
  70 #if HAVE_NBTOOL_CONFIG_H
  71 #include "nbtool_config.h"
  72 #endif
  73
  74 #include <sys/cdefs.h>
  75 #if defined(__COPYRIGHT) && !defined(lint)
  76 __COPYRIGHT("@(#) Copyright (c) 1991, 1993\
  77  The Regents of the University of California.  All rights reserved.");
  78 #endif /* not lint */
  79
  80 #if defined(__RCSID) && !defined(lint)
  81 #if 0
  82 static char sccsid[] = "@(#)cksum.c     8.2 (Berkeley) 4/28/95";
  83 #endif
  84 __RCSID("$NetBSD: cksum.c,v 1.45 2011/08/29 14:12:29 joerg Exp $");
  85 #endif /* not lint */
  86
  87 #include <sys/types.h>
  88
  89 #include <ctype.h>
  90 #include <err.h>
  91 #include <errno.h>
  92 #include <fcntl.h>
  93 #include <locale.h>
  94 #include <md2.h>
  95 #include <md4.h>
  96 #include <md5.h>
  97 #include <rmd160.h>
  98 #include <sha1.h>
  99 #include <sha2.h>
 100 #include <stdio.h>
 101 #include <stdlib.h>
 102 #include <string.h>
 103 #include <unistd.h>
 104
 105 #include "extern.h"
 106
 107 typedef char *(*_filefunc)(const char *, char *);
 108
 109 const struct hash {
 110         const char *progname;
 111         const char *hashname;
 112         void (*stringfunc)(const char *);
 113         void (*timetrialfunc)(void);
 114         void (*testsuitefunc)(void);
 115         void (*filterfunc)(int);
 116         char *(*filefunc)(const char *, char *);
 117 } hashes[] = {
 118         { "md2", "MD2",
 119           MD2String, MD2TimeTrial, MD2TestSuite,
 120           MD2Filter, MD2File },
 121         { "md4", "MD4",
 122           MD4String, MD4TimeTrial, MD4TestSuite,
 123           MD4Filter, MD4File },
 124         { "md5", "MD5",
 125           MD5String, MD5TimeTrial, MD5TestSuite,
 126           MD5Filter, MD5File },
 127         { "rmd160", "RMD160",
 128           RMD160String, RMD160TimeTrial, RMD160TestSuite,
 129           RMD160Filter, (_filefunc) RMD160File },
 130         { "sha1", "SHA1",
 131           SHA1String, SHA1TimeTrial, SHA1TestSuite,
 132           SHA1Filter, (_filefunc) SHA1File },
 133         { "sha256", "SHA256",
 134           SHA256_String, SHA256_TimeTrial, SHA256_TestSuite,
 135           SHA256_Filter, (_filefunc) SHA256_File },
 136         { "sha384", "SHA384",
 137           SHA384_String, SHA384_TimeTrial, SHA384_TestSuite,
 138           SHA384_Filter, (_filefunc) SHA384_File },
 139         { "sha512", "SHA512",
 140           SHA512_String, SHA512_TimeTrial, SHA512_TestSuite,
 141           SHA512_Filter, (_filefunc) SHA512_File },
 142         { .progname = NULL, },
 143 };
 144
 145 static int      hash_digest_file(char *, const struct hash *, int);
 146 __dead static void      requirehash(const char *);
 147 __dead static void      usage(void);
 148
 149 int
 150 main(int argc, char **argv)
 151 {
 152         int ch, fd, rval, dosum, pflag, nohashstdin;
 153         u_int32_t val;
 154         off_t len;
 155         char *fn;
 156         const char *progname;
 157         int (*cfncn) (int, u_int32_t *, off_t *);
 158         void (*pfncn) (char *, u_int32_t, off_t);
 159         const struct hash *hash;
 160         int normal, i, check_warn, do_check;
 161
 162         cfncn = NULL;
 163         pfncn = NULL;
 164         dosum = pflag = nohashstdin = 0;
 165         normal = 0;
 166         check_warn = 0;
 167         do_check = 0;
 168
 169         setlocale(LC_ALL, "");
 170
 171         progname = getprogname();
 172
 173         for (hash = hashes; hash->hashname != NULL; hash++)
 174                 if (strcmp(progname, hash->progname) == 0)
 175                         break;
 176
 177         if (hash->hashname == NULL) {
 178                 hash = NULL;
 179
 180                 if (!strcmp(progname, "sum")) {
 181                         dosum = 1;
 182                         cfncn = csum1;
 183                         pfncn = psum1;
 184                 } else {
 185                         cfncn = crc;
 186                         pfncn = pcrc;
 187                 }
 188         }
 189
 190         while ((ch = getopt(argc, argv, "a:cno:ps:twx")) != -1)
 191                 switch(ch) {
 192                 case 'a':
 193                         if (hash) {
 194                                 warnx("illegal use of -a option\n");
 195                                 usage();
 196                         }
 197                         i = 0;
 198                         while (hashes[i].hashname != NULL) {
 199                                 if (!strcasecmp(hashes[i].hashname, optarg)) {
 200                                         hash = &hashes[i];
 201                                         break;
 202                                 }
 203                                 i++;
 204                         }
 205                         if (hash == NULL) {
 206                                 if (!strcasecmp(optarg, "old1")) {
 207                                         cfncn = csum1;
 208                                         pfncn = psum1;
 209                                 } else if (!strcasecmp(optarg, "old2")) {
 210                                         cfncn = csum2;
 211                                         pfncn = psum2;
 212                                 } else if (!strcasecmp(optarg, "crc")) {
 213                                         cfncn = crc;
 214                                         pfncn = pcrc;
 215                                 } else {
 216                                         warnx("illegal argument to -a option");
 217                                         usage();
 218                                 }
 219                         }
 220                         break;
 221                 case 'c':
 222                         do_check = 1;
 223                         break;
 224                 case 'n':
 225                         normal = 1;
 226                         break;
 227                 case 'o':
 228                         if (hash) {
 229                                 warnx("%s mutually exclusive with sum",
 230                                       hash->hashname);
 231                                 usage();
 232                         }
 233                         if (!strcmp(optarg, "1")) {
 234                                 cfncn = csum1;
 235                                 pfncn = psum1;
 236                         } else if (!strcmp(optarg, "2")) {
 237                                 cfncn = csum2;
 238                                 pfncn = psum2;
 239                         } else {
 240                                 warnx("illegal argument to -o option");
 241                                 usage();
 242                         }
 243                         break;
 244                 case 'p':
 245                         if (hash == NULL)
 246                                 requirehash("-p");
 247                         pflag = 1;
 248                         break;
 249                 case 's':
 250                         if (hash == NULL)
 251                                 requirehash("-s");
 252                         nohashstdin = 1;
 253                         hash->stringfunc(optarg);
 254                         break;
 255                 case 't':
 256                         if (hash == NULL)
 257                                 requirehash("-t");
 258                         nohashstdin = 1;
 259                         hash->timetrialfunc();
 260                         break;
 261                 case 'w':
 262                         check_warn = 1;
 263                         break;
 264                 case 'x':
 265                         if (hash == NULL)
 266                                 requirehash("-x");
 267                         nohashstdin = 1;
 268                         hash->testsuitefunc();
 269                         break;
 270                 case '?':
 271                 default:
 272                         usage();
 273                 }
 274         argc -= optind;
 275         argv += optind;
 276
 277         if (do_check) {
 278                 /*
 279                  * Verify checksums
 280                  */
 281                 FILE *f;
 282                 char buf[BUFSIZ];
 283                 char *s, *p_filename, *p_cksum;
 284                 int l_filename, l_cksum;
 285                 char filename[BUFSIZ];
 286                 char cksum[BUFSIZ];
 287                 int ok,cnt,badcnt;
 288
 289                 rval = 0;
 290                 cnt = badcnt = 0;
 291
 292                 if (argc == 0) {
 293                         f = fdopen(STDIN_FILENO, "r");
 294                 } else {
 295                         f = fopen(argv[0], "r");
 296                 }
 297                 if (f == NULL)
 298                         err(1, "Cannot read %s",
 299                             argc>0?argv[0]:"stdin");
 300
 301                 while(fgets(buf, sizeof(buf), f) != NULL) {
 302                         s=strrchr(buf, '\n');
 303                         if (s)
 304                                 *s = '\0';
 305
 306                         p_cksum = p_filename = NULL;
 307
 308                         p_filename = strchr(buf, '(');
 309                         if (p_filename) {
 310                                 /*
 311                                  * Assume 'normal' output if there's a '('
 312                                  */
 313                                 p_filename += 1;
 314                                 normal = 0;
 315
 316                                 p_cksum = strrchr(p_filename, ')');
 317                                 if (p_cksum == NULL) {
 318                                         if (check_warn)
 319                                                 warnx("bogus format: %s. "
 320                                                       "Skipping...",
 321                                                       buf);
 322                                         rval = 1;
 323                                         continue;
 324                                 }
 325                                 p_cksum += 4;
 326
 327                                 l_cksum = strlen(p_cksum);
 328                                 l_filename = p_cksum - p_filename - 4;
 329
 330                                 /* Sanity check, and find proper hash if
 331                                  * it's not the same as the current program
 332                                  */
 333                                 if (hash == NULL ||
 334                                     strncmp(buf, hash->hashname,
 335                                             strlen(hash->hashname)) != 0) {
 336                                         /*
 337                                          * Search proper hash
 338                                          */
 339                                         const struct hash *nhash;
 340
 341                                         for (nhash = hashes ;
 342                                              nhash->hashname != NULL;
 343                                              nhash++)
 344                                                 if (strncmp(buf,
 345                                                             nhash->hashname,
 346                                                             strlen(nhash->hashname)) == 0)
 347                                                         break;
 348
 349
 350                                         if (nhash->hashname == NULL) {
 351                                                 if (check_warn)
 352                                                         warnx("unknown hash: %s",
 353                                                               buf);
 354                                                 rval = 1;
 355                                                 continue;
 356                                         } else {
 357                                                 hash = nhash;
 358                                         }
 359                                 }
 360
 361                         } else {
 362                                 if (hash) {
 363                                         int nspaces;
 364
 365                                         /*
 366                                          * 'normal' output, no (ck)sum
 367                                          */
 368                                         normal = 1;
 369                                         nspaces = 1;
 370
 371                                         p_cksum = buf;
 372                                         p_filename = strchr(buf, ' ');
 373                                         if (p_filename == NULL) {
 374                                                 if (check_warn)
 375                                                         warnx("no filename in %s? "
 376                                                               "Skipping...", buf);
 377                                                 rval = 1;
 378                                                 continue;
 379                                         }
 380                                         while (isspace((int)*++p_filename))
 381                                                 nspaces++;
 382                                         l_filename = strlen(p_filename);
 383                                         l_cksum = p_filename - buf - nspaces;
 384                                 } else {
 385                                         /*
 386                                          * sum/cksum output format
 387                                          */
 388                                         p_cksum = buf;
 389                                         s=strchr(p_cksum, ' ');
 390                                         if (s == NULL) {
 391                                                 if (check_warn)
 392                                                         warnx("bogus format: %s."
 393                                                               " Skipping...",
 394                                                               buf);
 395                                                 rval = 1;
 396                                                 continue;
 397                                         }
 398                                         l_cksum = s - p_cksum;
 399
 400                                         p_filename = strrchr(buf, ' ');
 401                                         if (p_filename == NULL) {
 402                                                 if (check_warn)
 403                                                         warnx("no filename in %s?"
 404                                                               " Skipping...",
 405                                                               buf);
 406                                                 rval = 1;
 407                                                 continue;
 408                                         }
 409                                         p_filename++;
 410                                         l_filename = strlen(p_filename);
 411                                 }
 412                         }
 413
 414                         strlcpy(filename, p_filename, l_filename+1);
 415                         strlcpy(cksum, p_cksum, l_cksum+1);
 416
 417                         if (hash) {
 418                                 if (access(filename, R_OK) == 0
 419                                     && strcmp(cksum, hash->filefunc(filename, NULL)) == 0)
 420                                         ok = 1;
 421                                 else
 422                                         ok = 0;
 423                         } else {
 424                                 if ((fd = open(filename, O_RDONLY, 0)) < 0) {
 425                                         if (check_warn)
 426                                                 warn("%s", filename);
 427                                         rval = 1;
 428                                         ok = 0;
 429                                 } else {
 430                                         if (cfncn(fd, &val, &len))
 431                                                 ok = 0;
 432                                         else {
 433                                                 u_int32_t should_val;
 434
 435                                                 should_val =
 436                                                   strtoul(cksum, NULL, 10);
 437                                                 if (val == should_val)
 438                                                         ok = 1;
 439                                                 else
 440                                                         ok = 0;
 441                                         }
 442                                         close(fd);
 443                                 }
 444                         }
 445
 446                         if (! ok) {
 447                                 if (hash)
 448                                         printf("(%s) ", hash->hashname);
 449                                 printf("%s: FAILED\n", filename);
 450                                 badcnt++;
 451                         }
 452                         cnt++;
 453
 454                 }
 455                 fclose(f);
 456
 457                 if (badcnt > 0)
 458                         rval = 1;
 459
 460         } else {
 461                 /*
 462                  * Calculate checksums
 463                  */
 464
 465                 fd = STDIN_FILENO;
 466                 fn = NULL;
 467                 rval = 0;
 468                 do {
 469                         if (*argv) {
 470                                 fn = *argv++;
 471                                 if (hash != NULL) {
 472                                         if (hash_digest_file(fn, hash, normal)) {
 473                                                 warn("%s", fn);
 474                                                 rval = 1;
 475                                         }
 476                                         continue;
 477                                 }
 478                                 if ((fd = open(fn, O_RDONLY, 0)) < 0) {
 479                                         warn("%s", fn);
 480                                         rval = 1;
 481                                         continue;
 482                                 }
 483                         } else if (hash && !nohashstdin) {
 484                                 hash->filterfunc(pflag);
 485                         }
 486
 487                         if (hash == NULL) {
 488                                 if (cfncn(fd, &val, &len)) {
 489                                         warn("%s", fn ? fn : "stdin");
 490                                         rval = 1;
 491                                 } else
 492                                         pfncn(fn, val, len);
 493                                 (void)close(fd);
 494                         }
 495                 } while (*argv);
 496         }
 497         exit(rval);
 498 }
 499
 500 static int
 501 hash_digest_file(char *fn, const struct hash *hash, int normal)
 502 {
 503         char *cp;
 504
 505         cp = hash->filefunc(fn, NULL);
 506         if (cp == NULL)
 507                 return 1;
 508
 509         if (normal)
 510                 printf("%s %s\n", cp, fn);
 511         else
 512                 printf("%s (%s) = %s\n", hash->hashname, fn, cp);
 513
 514         free(cp);
 515
 516         return 0;
 517 }
 518
 519 static void
 520 requirehash(const char *flg)
 521 {
 522         warnx("%s flag requires `-a algorithm'", flg);
 523         usage();
 524 }
 525
 526 static void
 527 usage(void)
 528 {
 529         const char fileargs[] = "[file ... | -c [-w] [sumfile]]";
 530         const char sumargs[] = "[-n] [-a algorithm [-ptx] [-s string]] [-o 1|2]";
 531         const char hashargs[] = "[-nptx] [-s string]";
 532
 533         (void)fprintf(stderr, "usage: cksum %s\n             %s\n",
 534             sumargs, fileargs);
 535         (void)fprintf(stderr, "       sum %s\n           %s\n",
 536             sumargs, fileargs);
 537         (void)fprintf(stderr, "       md2 %s %s\n", hashargs, fileargs);
 538         (void)fprintf(stderr, "       md4 %s %s\n", hashargs, fileargs);
 539         (void)fprintf(stderr, "       md5 %s %s\n", hashargs, fileargs);
 540         (void)fprintf(stderr, "       rmd160 %s %s\n", hashargs, fileargs);
 541         (void)fprintf(stderr, "       sha1 %s %s\n", hashargs, fileargs);
 542         exit(1);
 543 }