usr.bin/cksum/cksum.c

   1 /*      $NetBSD: cksum.c,v 1.48 2015/06/16 22:54:10 christos 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 1.48 2015/06/16 22:54:10 christos 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 #define PRINT_NORMAL     0x01
 108 #define PRINT_QUIET      0x02
 109
 110 typedef char *(*_filefunc)(const char *, char *);
 111
 112 const struct hash {
 113         const char *progname;
 114         const char *hashname;
 115         void (*stringfunc)(const char *);
 116         void (*timetrialfunc)(void);
 117         void (*testsuitefunc)(void);
 118         void (*filterfunc)(int);
 119         char *(*filefunc)(const char *, char *);
 120 } hashes[] = {
 121         { "md2", "MD2",
 122           MD2String, MD2TimeTrial, MD2TestSuite,
 123           MD2Filter, MD2File },
 124         { "md4", "MD4",
 125           MD4String, MD4TimeTrial, MD4TestSuite,
 126           MD4Filter, MD4File },
 127         { "md5", "MD5",
 128           MD5String, MD5TimeTrial, MD5TestSuite,
 129           MD5Filter, MD5File },
 130         { "rmd160", "RMD160",
 131           RMD160String, RMD160TimeTrial, RMD160TestSuite,
 132           RMD160Filter, (_filefunc) RMD160File },
 133         { "sha1", "SHA1",
 134           SHA1String, SHA1TimeTrial, SHA1TestSuite,
 135           SHA1Filter, (_filefunc) SHA1File },
 136         { "sha256", "SHA256",
 137           SHA256_String, SHA256_TimeTrial, SHA256_TestSuite,
 138           SHA256_Filter, (_filefunc) SHA256_File },
 139         { "sha384", "SHA384",
 140           SHA384_String, SHA384_TimeTrial, SHA384_TestSuite,
 141           SHA384_Filter, (_filefunc) SHA384_File },
 142         { "sha512", "SHA512",
 143           SHA512_String, SHA512_TimeTrial, SHA512_TestSuite,
 144           SHA512_Filter, (_filefunc) SHA512_File },
 145         { .progname = NULL, },
 146 };
 147
 148 static int      hash_digest_file(char *, const struct hash *, int);
 149 __dead static void      requirehash(const char *);
 150 __dead static void      usage(void);
 151
 152 int
 153 main(int argc, char **argv)
 154 {
 155         int ch, fd, rval, pflag, nohashstdin;
 156         u_int32_t val;
 157         off_t len;
 158         char *fn;
 159         const char *progname;
 160         int (*cfncn) (int, u_int32_t *, off_t *);
 161         void (*pfncn) (char *, u_int32_t, off_t);
 162         const struct hash *hash;
 163         int i, check_warn, do_check;
 164         int print_flags;
 165
 166         cfncn = NULL;
 167         pfncn = NULL;
 168         pflag = nohashstdin = 0;
 169         check_warn = 0;
 170         do_check = 0;
 171         print_flags = 0;
 172
 173         setlocale(LC_ALL, "");
 174
 175         progname = getprogname();
 176
 177         for (hash = hashes; hash->hashname != NULL; hash++)
 178                 if (strcmp(progname, hash->progname) == 0)
 179                         break;
 180
 181         if (hash->hashname == NULL) {
 182                 hash = NULL;
 183
 184                 if (!strcmp(progname, "sum")) {
 185                         cfncn = csum1;
 186                         pfncn = psum1;
 187                 } else {
 188                         cfncn = crc;
 189                         pfncn = pcrc;
 190                 }
 191         }
 192
 193         while ((ch = getopt(argc, argv, "a:cno:pqs:twx")) != -1)
 194                 switch(ch) {
 195                 case 'a':
 196                         if (hash) {
 197                                 warnx("illegal use of -a option");
 198                                 usage();
 199                         }
 200                         i = 0;
 201                         while (hashes[i].hashname != NULL) {
 202                                 if (!strcasecmp(hashes[i].hashname, optarg)) {
 203                                         hash = &hashes[i];
 204                                         break;
 205                                 }
 206                                 i++;
 207                         }
 208                         if (hash == NULL) {
 209                                 if (!strcasecmp(optarg, "old1")) {
 210                                         cfncn = csum1;
 211                                         pfncn = psum1;
 212                                 } else if (!strcasecmp(optarg, "old2")) {
 213                                         cfncn = csum2;
 214                                         pfncn = psum2;
 215                                 } else if (!strcasecmp(optarg, "crc")) {
 216                                         cfncn = crc;
 217                                         pfncn = pcrc;
 218                                 } else {
 219                                         warnx("illegal argument to -a option");
 220                                         usage();
 221                                 }
 222                         }
 223                         break;
 224                 case 'c':
 225                         do_check = 1;
 226                         break;
 227                 case 'n':
 228                         print_flags |= PRINT_NORMAL;
 229                         break;
 230                 case 'o':
 231                         if (hash) {
 232                                 warnx("%s mutually exclusive with sum",
 233                                       hash->hashname);
 234                                 usage();
 235                         }
 236                         if (!strcmp(optarg, "1")) {
 237                                 cfncn = csum1;
 238                                 pfncn = psum1;
 239                         } else if (!strcmp(optarg, "2")) {
 240                                 cfncn = csum2;
 241                                 pfncn = psum2;
 242                         } else {
 243                                 warnx("illegal argument to -o option");
 244                                 usage();
 245                         }
 246                         break;
 247                 case 'p':
 248                         if (hash == NULL)
 249                                 requirehash("-p");
 250                         pflag = 1;
 251                         break;
 252                 case 'q':
 253                         print_flags |= PRINT_QUIET;
 254                         break;
 255                 case 's':
 256                         if (hash == NULL)
 257                                 requirehash("-s");
 258                         nohashstdin = 1;
 259                         hash->stringfunc(optarg);
 260                         break;
 261                 case 't':
 262                         if (hash == NULL)
 263                                 requirehash("-t");
 264                         nohashstdin = 1;
 265                         hash->timetrialfunc();
 266                         break;
 267                 case 'w':
 268                         check_warn = 1;
 269                         break;
 270                 case 'x':
 271                         if (hash == NULL)
 272                                 requirehash("-x");
 273                         nohashstdin = 1;
 274                         hash->testsuitefunc();
 275                         break;
 276                 case '?':
 277                 default:
 278                         usage();
 279                 }
 280         argc -= optind;
 281         argv += optind;
 282
 283         if (do_check) {
 284                 /*
 285                  * Verify checksums
 286                  */
 287                 FILE *f;
 288                 char buf[BUFSIZ];
 289                 char *s, *p_filename, *p_cksum;
 290                 int l_filename, l_cksum;
 291                 char filename[BUFSIZ];
 292                 char cksum[BUFSIZ];
 293                 int ok,cnt,badcnt;
 294
 295                 rval = 0;
 296                 cnt = badcnt = 0;
 297
 298                 if (argc == 0) {
 299                         f = fdopen(STDIN_FILENO, "r");
 300                 } else {
 301                         f = fopen(argv[0], "r");
 302                 }
 303                 if (f == NULL)
 304                         err(1, "Cannot read %s",
 305                             argc>0?argv[0]:"stdin");
 306
 307                 while(fgets(buf, sizeof(buf), f) != NULL) {
 308                         s = strrchr(buf, '\n');
 309                         if (s)
 310                                 *s = '\0';
 311
 312                         p_cksum = p_filename = NULL;
 313
 314                         p_filename = strchr(buf, '(');
 315                         if (p_filename) {
 316                                 /*
 317                                  * Assume 'normal' output if there's a '('
 318                                  */
 319                                 p_filename += 1;
 320                                 print_flags &= ~(PRINT_NORMAL);
 321
 322                                 p_cksum = strrchr(p_filename, ')');
 323                                 if (p_cksum == NULL) {
 324                                         if (check_warn)
 325                                                 warnx("bogus format: %s. "
 326                                                       "Skipping...",
 327                                                       buf);
 328                                         rval = 1;
 329                                         continue;
 330                                 }
 331                                 p_cksum += 4;
 332
 333                                 l_cksum = strlen(p_cksum);
 334                                 l_filename = p_cksum - p_filename - 4;
 335
 336                                 /* Sanity check, and find proper hash if
 337                                  * it's not the same as the current program
 338                                  */
 339                                 if (hash == NULL ||
 340                                     strncmp(buf, hash->hashname,
 341                                             strlen(hash->hashname)) != 0) {
 342                                         /*
 343                                          * Search proper hash
 344                                          */
 345                                         const struct hash *nhash;
 346
 347                                         for (nhash = hashes ;
 348                                              nhash->hashname != NULL;
 349                                              nhash++)
 350                                                 if (strncmp(buf,
 351                                                             nhash->hashname,
 352                                                             strlen(nhash->hashname)) == 0)
 353                                                         break;
 354
 355
 356                                         if (nhash->hashname == NULL) {
 357                                                 if (check_warn)
 358                                                         warnx("unknown hash: %s",
 359                                                               buf);
 360                                                 rval = 1;
 361                                                 continue;
 362                                         } else {
 363                                                 hash = nhash;
 364                                         }
 365                                 }
 366
 367                         } else {
 368                                 if (hash) {
 369                                         int nspaces;
 370
 371                                         /*
 372                                          * 'normal' output, no (ck)sum
 373                                          */
 374                                         print_flags |= PRINT_NORMAL;
 375                                         nspaces = 1;
 376
 377                                         p_cksum = buf;
 378                                         p_filename = strchr(buf, ' ');
 379                                         if (p_filename == NULL) {
 380                                                 if (check_warn)
 381                                                         warnx("no filename in %s? "
 382                                                               "Skipping...", buf);
 383                                                 rval = 1;
 384                                                 continue;
 385                                         }
 386                                         while (isspace((int)*++p_filename))
 387                                                 nspaces++;
 388                                         l_filename = strlen(p_filename);
 389                                         l_cksum = p_filename - buf - nspaces;
 390                                 } else {
 391                                         /*
 392                                          * sum/cksum output format
 393                                          */
 394                                         p_cksum = buf;
 395                                         s=strchr(p_cksum, ' ');
 396                                         if (s == NULL) {
 397                                                 if (check_warn)
 398                                                         warnx("bogus format: %s."
 399                                                               " Skipping...",
 400                                                               buf);
 401                                                 rval = 1;
 402                                                 continue;
 403                                         }
 404                                         l_cksum = s - p_cksum;
 405
 406                                         p_filename = strrchr(buf, ' ');
 407                                         if (p_filename == NULL) {
 408                                                 if (check_warn)
 409                                                         warnx("no filename in %s?"
 410                                                               " Skipping...",
 411                                                               buf);
 412                                                 rval = 1;
 413                                                 continue;
 414                                         }
 415                                         p_filename++;
 416                                         l_filename = strlen(p_filename);
 417                                 }
 418                         }
 419
 420                         strlcpy(filename, p_filename, l_filename+1);
 421                         strlcpy(cksum, p_cksum, l_cksum+1);
 422
 423                         if (hash) {
 424                                 if (access(filename, R_OK) == 0
 425                                     && strcmp(cksum, hash->filefunc(filename, NULL)) == 0)
 426                                         ok = 1;
 427                                 else
 428                                         ok = 0;
 429                         } else {
 430                                 if ((fd = open(filename, O_RDONLY, 0)) < 0) {
 431                                         if (check_warn)
 432                                                 warn("%s", filename);
 433                                         rval = 1;
 434                                         ok = 0;
 435                                 } else {
 436                                         if (cfncn(fd, &val, &len))
 437                                                 ok = 0;
 438                                         else {
 439                                                 u_int32_t should_val;
 440
 441                                                 should_val =
 442                                                   strtoul(cksum, NULL, 10);
 443                                                 if (val == should_val)
 444                                                         ok = 1;
 445                                                 else
 446                                                         ok = 0;
 447                                         }
 448                                         close(fd);
 449                                 }
 450                         }
 451
 452                         if (! ok) {
 453                                 if (hash)
 454                                         printf("(%s) ", hash->hashname);
 455                                 printf("%s: FAILED\n", filename);
 456                                 badcnt++;
 457                         }
 458                         cnt++;
 459
 460                 }
 461                 fclose(f);
 462
 463                 if (badcnt > 0)
 464                         rval = 1;
 465
 466         } else {
 467                 /*
 468                  * Calculate checksums
 469                  */
 470
 471                 fd = STDIN_FILENO;
 472                 fn = NULL;
 473                 rval = 0;
 474                 do {
 475                         if (*argv) {
 476                                 fn = *argv++;
 477                                 if (hash != NULL) {
 478                                         if (hash_digest_file(fn, hash, print_flags)) {
 479                                                 warn("%s", fn);
 480                                                 rval = 1;
 481                                         }
 482                                         continue;
 483                                 }
 484                                 if ((fd = open(fn, O_RDONLY, 0)) < 0) {
 485                                         warn("%s", fn);
 486                                         rval = 1;
 487                                         continue;
 488                                 }
 489                         } else if (hash && !nohashstdin) {
 490                                 hash->filterfunc(pflag);
 491                         }
 492
 493                         if (hash == NULL) {
 494                                 if (cfncn(fd, &val, &len)) {
 495                                         warn("%s", fn ? fn : "stdin");
 496                                         rval = 1;
 497                                 } else
 498                                         pfncn(fn, val, len);
 499                                 (void)close(fd);
 500                         }
 501                 } while (*argv);
 502         }
 503         exit(rval);
 504 }
 505
 506 static int
 507 hash_digest_file(char *fn, const struct hash *hash, int flags)
 508 {
 509         char *cp;
 510
 511         cp = hash->filefunc(fn, NULL);
 512         if (cp == NULL)
 513                 return 1;
 514
 515         if (flags & PRINT_QUIET)
 516                 printf("%s\n", cp);
 517         else if (flags & PRINT_NORMAL)
 518                 printf("%s %s\n", cp, fn);
 519         else
 520                 printf("%s (%s) = %s\n", hash->hashname, fn, cp);
 521
 522         free(cp);
 523
 524         return 0;
 525 }
 526
 527 static void
 528 requirehash(const char *flg)
 529 {
 530         warnx("%s flag requires `-a algorithm'", flg);
 531         usage();
 532 }
 533
 534 static void
 535 usage(void)
 536 {
 537         const char fileargs[] = "[file ... | -c [-w] [sumfile]]";
 538         const char sumargs[] = "[-n] [-a algorithm [-ptx] [-s string]] [-o 1|2]";
 539         const char hashargs[] = "[-nptx] [-s string]";
 540
 541         (void)fprintf(stderr, "usage: cksum %s\n             %s\n",
 542             sumargs, fileargs);
 543         (void)fprintf(stderr, "       sum %s\n           %s\n",
 544             sumargs, fileargs);
 545         (void)fprintf(stderr, "       md2 %s %s\n", hashargs, fileargs);
 546         (void)fprintf(stderr, "       md4 %s %s\n", hashargs, fileargs);
 547         (void)fprintf(stderr, "       md5 %s %s\n", hashargs, fileargs);
 548         (void)fprintf(stderr, "       rmd160 %s %s\n", hashargs, fileargs);
 549         (void)fprintf(stderr, "       sha1 %s %s\n", hashargs, fileargs);
 550         exit(1);
 551 }