grub-core/commands/legacycfg.c

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2000, 2001, 2010  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <grub/types.h>
  20 #include <grub/misc.h>
  21 #include <grub/command.h>
  22 #include <grub/mm.h>
  23 #include <grub/err.h>
  24 #include <grub/dl.h>
  25 #include <grub/file.h>
  26 #include <grub/normal.h>
  27 #include <grub/script_sh.h>
  28 #include <grub/i18n.h>
  29 #include <grub/term.h>
  30 #include <grub/legacy_parse.h>
  31 #include <grub/crypto.h>
  32 #include <grub/auth.h>
  33 #include <grub/disk.h>
  34 #include <grub/partition.h>
  35
  36 GRUB_MOD_LICENSE ("GPLv3+");
  37
  38 /* Helper for legacy_file.  */
  39 static grub_err_t
  40 legacy_file_getline (char **line, int cont __attribute__ ((unused)),
  41                      void *data __attribute__ ((unused)))
  42 {
  43   *line = 0;
  44   return GRUB_ERR_NONE;
  45 }
  46
  47 static grub_err_t
  48 legacy_file (const char *filename)
  49 {
  50   grub_file_t file;
  51   char *entryname = NULL, *entrysrc = NULL;
  52   grub_menu_t menu;
  53   char *suffix = grub_strdup ("");
  54
  55   if (!suffix)
  56     return grub_errno;
  57
  58   file = grub_file_open (filename);
  59   if (! file)
  60     {
  61       grub_free (suffix);
  62       return grub_errno;
  63     }
  64
  65   menu = grub_env_get_menu ();
  66   if (! menu)
  67     {
  68       menu = grub_zalloc (sizeof (*menu));
  69       if (! menu)
  70         {
  71           grub_free (suffix);
  72           return grub_errno;
  73         }
  74
  75       grub_env_set_menu (menu);
  76     }
  77
  78   while (1)
  79     {
  80       char *buf = grub_file_getline (file);
  81       char *parsed = NULL;
  82
  83       if (!buf && grub_errno)
  84         {
  85           grub_file_close (file);
  86           grub_free (suffix);
  87           return grub_errno;
  88         }
  89
  90       if (!buf)
  91         break;
  92
  93       {
  94         char *oldname = NULL;
  95         char *newsuffix;
  96         char *ptr;
  97
  98         for (ptr = buf; *ptr && grub_isspace (*ptr); ptr++);
  99
 100         oldname = entryname;
 101         parsed = grub_legacy_parse (ptr, &entryname, &newsuffix);
 102         grub_free (buf);
 103         buf = NULL;
 104         if (newsuffix)
 105           {
 106             char *t;
 107
 108             t = suffix;
 109             suffix = grub_realloc (suffix, grub_strlen (suffix)
 110                                    + grub_strlen (newsuffix) + 1);
 111             if (!suffix)
 112               {
 113                 grub_free (t);
 114                 grub_free (entrysrc);
 115                 grub_free (parsed);
 116                 grub_free (newsuffix);
 117                 grub_free (suffix);
 118                 return grub_errno;
 119               }
 120             grub_memcpy (suffix + grub_strlen (suffix), newsuffix,
 121                          grub_strlen (newsuffix) + 1);
 122             grub_free (newsuffix);
 123             newsuffix = NULL;
 124           }
 125         if (oldname != entryname && oldname)
 126           {
 127             const char **args = grub_malloc (sizeof (args[0]));
 128             if (!args)
 129               {
 130                 grub_file_close (file);
 131                 return grub_errno;
 132               }
 133             args[0] = oldname;
 134             grub_normal_add_menu_entry (1, args, NULL, NULL, "legacy",
 135                                         NULL, NULL,
 136                                         entrysrc, 0);
 137             grub_free (args);
 138             entrysrc[0] = 0;
 139             grub_free (oldname);
 140           }
 141       }
 142
 143       if (parsed && !entryname)
 144         {
 145           grub_normal_parse_line (parsed, legacy_file_getline, NULL);
 146           grub_print_error ();
 147           grub_free (parsed);
 148           parsed = NULL;
 149         }
 150       else if (parsed)
 151         {
 152           if (!entrysrc)
 153             entrysrc = parsed;
 154           else
 155             {
 156               char *t;
 157
 158               t = entrysrc;
 159               entrysrc = grub_realloc (entrysrc, grub_strlen (entrysrc)
 160                                        + grub_strlen (parsed) + 1);
 161               if (!entrysrc)
 162                 {
 163                   grub_free (t);
 164                   grub_free (parsed);
 165                   grub_free (suffix);
 166                   return grub_errno;
 167                 }
 168               grub_memcpy (entrysrc + grub_strlen (entrysrc), parsed,
 169                            grub_strlen (parsed) + 1);
 170               grub_free (parsed);
 171               parsed = NULL;
 172             }
 173         }
 174     }
 175   grub_file_close (file);
 176
 177   if (entryname)
 178     {
 179       const char **args = grub_malloc (sizeof (args[0]));
 180       if (!args)
 181         {
 182           grub_file_close (file);
 183           grub_free (suffix);
 184           grub_free (entrysrc);
 185           return grub_errno;
 186         }
 187       args[0] = entryname;
 188       grub_normal_add_menu_entry (1, args, NULL, NULL, NULL,
 189                                   NULL, NULL, entrysrc, 0);
 190       grub_free (args);
 191     }
 192
 193   grub_normal_parse_line (suffix, legacy_file_getline, NULL);
 194   grub_print_error ();
 195   grub_free (suffix);
 196   grub_free (entrysrc);
 197
 198   return GRUB_ERR_NONE;
 199 }
 200
 201 static grub_err_t
 202 grub_cmd_legacy_source (struct grub_command *cmd,
 203                         int argc, char **args)
 204 {
 205   int new_env, extractor;
 206   grub_err_t ret;
 207
 208   if (argc != 1)
 209     return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
 210
 211   extractor = (cmd->name[0] == 'e');
 212   new_env = (cmd->name[extractor ? (sizeof ("extract_legacy_entries_") - 1)
 213                        : (sizeof ("legacy_") - 1)] == 'c');
 214
 215   if (new_env)
 216     grub_cls ();
 217
 218   if (new_env && !extractor)
 219     grub_env_context_open ();
 220   if (extractor)
 221     grub_env_extractor_open (!new_env);
 222
 223   ret = legacy_file (args[0]);
 224
 225   if (new_env)
 226     {
 227       grub_menu_t menu;
 228       menu = grub_env_get_menu ();
 229       if (menu && menu->size)
 230         grub_show_menu (menu, 1, 0);
 231       if (!extractor)
 232         grub_env_context_close ();
 233     }
 234   if (extractor)
 235     grub_env_extractor_close (!new_env);
 236
 237   return ret;
 238 }
 239
 240 static enum
 241   {
 242     GUESS_IT, LINUX, MULTIBOOT, KFREEBSD, KNETBSD, KOPENBSD
 243   } kernel_type;
 244
 245 static grub_err_t
 246 grub_cmd_legacy_kernel (struct grub_command *mycmd __attribute__ ((unused)),
 247                         int argc, char **args)
 248 {
 249   int i;
 250 #ifdef TODO
 251   int no_mem_option = 0;
 252 #endif
 253   struct grub_command *cmd;
 254   char **cutargs;
 255   int cutargc;
 256
 257   for (i = 0; i < 2; i++)
 258     {
 259       /* FIXME: really support this.  */
 260       if (argc >= 1 && grub_strcmp (args[0], "--no-mem-option") == 0)
 261         {
 262 #ifdef TODO
 263           no_mem_option = 1;
 264 #endif
 265           argc--;
 266           args++;
 267           continue;
 268         }
 269
 270       /* linux16 handles both zImages and bzImages.   */
 271       if (argc >= 1 && (grub_strcmp (args[0], "--type=linux") == 0
 272                         || grub_strcmp (args[0], "--type=biglinux") == 0))
 273         {
 274           kernel_type = LINUX;
 275           argc--;
 276           args++;
 277           continue;
 278         }
 279
 280       if (argc >= 1 && grub_strcmp (args[0], "--type=multiboot") == 0)
 281         {
 282           kernel_type = MULTIBOOT;
 283           argc--;
 284           args++;
 285           continue;
 286         }
 287
 288       if (argc >= 1 && grub_strcmp (args[0], "--type=freebsd") == 0)
 289         {
 290           kernel_type = KFREEBSD;
 291           argc--;
 292           args++;
 293           continue;
 294         }
 295
 296       if (argc >= 1 && grub_strcmp (args[0], "--type=openbsd") == 0)
 297         {
 298           kernel_type = KOPENBSD;
 299           argc--;
 300           args++;
 301           continue;
 302         }
 303
 304       if (argc >= 1 && grub_strcmp (args[0], "--type=netbsd") == 0)
 305         {
 306           kernel_type = KNETBSD;
 307           argc--;
 308           args++;
 309           continue;
 310         }
 311     }
 312
 313   if (argc < 2)
 314     return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
 315
 316   cutargs = grub_malloc (sizeof (cutargs[0]) * (argc - 1));
 317   cutargc = argc - 1;
 318   grub_memcpy (cutargs + 1, args + 2, sizeof (cutargs[0]) * (argc - 2));
 319   cutargs[0] = args[0];
 320
 321   do
 322     {
 323       /* First try Linux.  */
 324       if (kernel_type == GUESS_IT || kernel_type == LINUX)
 325         {
 326 #ifdef GRUB_MACHINE_PCBIOS
 327           cmd = grub_command_find ("linux16");
 328 #else
 329           cmd = grub_command_find ("linux");
 330 #endif
 331           if (cmd)
 332             {
 333               if (!(cmd->func) (cmd, cutargc, cutargs))
 334                 {
 335                   kernel_type = LINUX;
 336                   return GRUB_ERR_NONE;
 337                 }
 338             }
 339           grub_errno = GRUB_ERR_NONE;
 340         }
 341
 342       /* Then multiboot.  */
 343       if (kernel_type == GUESS_IT || kernel_type == MULTIBOOT)
 344         {
 345           cmd = grub_command_find ("multiboot");
 346           if (cmd)
 347             {
 348               if (!(cmd->func) (cmd, argc, args))
 349                 {
 350                   kernel_type = MULTIBOOT;
 351                   return GRUB_ERR_NONE;
 352                 }
 353             }
 354           grub_errno = GRUB_ERR_NONE;
 355         }
 356
 357       {
 358         int bsd_device = -1;
 359         int bsd_slice = -1;
 360         int bsd_part = -1;
 361         {
 362           grub_device_t dev;
 363           const char *hdbiasstr;
 364           int hdbias = 0;
 365           hdbiasstr = grub_env_get ("legacy_hdbias");
 366           if (hdbiasstr)
 367             {
 368               hdbias = grub_strtoul (hdbiasstr, 0, 0);
 369               grub_errno = GRUB_ERR_NONE;
 370             }
 371           dev = grub_device_open (0);
 372           if (dev && dev->disk
 373               && dev->disk->dev->id == GRUB_DISK_DEVICE_BIOSDISK_ID
 374               && dev->disk->id >= 0x80 && dev->disk->id <= 0x90)
 375             {
 376               struct grub_partition *part = dev->disk->partition;
 377               bsd_device = dev->disk->id - 0x80 - hdbias;
 378               if (part && (grub_strcmp (part->partmap->name, "netbsd") == 0
 379                            || grub_strcmp (part->partmap->name, "openbsd") == 0
 380                            || grub_strcmp (part->partmap->name, "bsd") == 0))
 381                 {
 382                   bsd_part = part->number;
 383                   part = part->parent;
 384                 }
 385               if (part && grub_strcmp (part->partmap->name, "msdos") == 0)
 386                 bsd_slice = part->number;
 387             }
 388           if (dev)
 389             grub_device_close (dev);
 390         }
 391
 392         /* k*BSD didn't really work well with grub-legacy.  */
 393         if (kernel_type == GUESS_IT || kernel_type == KFREEBSD)
 394           {
 395             char buf[sizeof("adXXXXXXXXXXXXsXXXXXXXXXXXXYYY")];
 396             if (bsd_device != -1)
 397               {
 398                 if (bsd_slice != -1 && bsd_part != -1)
 399                   grub_snprintf(buf, sizeof(buf), "ad%ds%d%c", bsd_device,
 400                                 bsd_slice, 'a' + bsd_part);
 401                 else if (bsd_slice != -1)
 402                   grub_snprintf(buf, sizeof(buf), "ad%ds%d", bsd_device,
 403                                 bsd_slice);
 404                 else
 405                   grub_snprintf(buf, sizeof(buf), "ad%d", bsd_device);
 406                 grub_env_set ("kFreeBSD.vfs.root.mountfrom", buf);
 407               }
 408             else
 409               grub_env_unset ("kFreeBSD.vfs.root.mountfrom");
 410             cmd = grub_command_find ("kfreebsd");
 411             if (cmd)
 412               {
 413                 if (!(cmd->func) (cmd, cutargc, cutargs))
 414                   {
 415                     kernel_type = KFREEBSD;
 416                     return GRUB_ERR_NONE;
 417                   }
 418               }
 419             grub_errno = GRUB_ERR_NONE;
 420           }
 421         {
 422           char **bsdargs;
 423           int bsdargc;
 424           char bsddevname[sizeof ("wdXXXXXXXXXXXXY")];
 425           if (bsd_device == -1)
 426             {
 427               bsdargs = cutargs;
 428               bsdargc = cutargc;
 429             }
 430           else
 431             {
 432               char rbuf[3] = "-r";
 433               bsdargc = cutargc + 2;
 434               bsdargs = grub_malloc (sizeof (bsdargs[0]) * bsdargc);
 435               grub_memcpy (bsdargs, args, argc * sizeof (bsdargs[0]));
 436               bsdargs[argc] = rbuf;
 437               bsdargs[argc + 1] = bsddevname;
 438               grub_snprintf (bsddevname, sizeof (bsddevname),
 439                              "wd%d%c", bsd_device,
 440                              bsd_part != -1 ? bsd_part + 'a' : 'c');
 441             }
 442           if (kernel_type == GUESS_IT || kernel_type == KNETBSD)
 443             {
 444               cmd = grub_command_find ("knetbsd");
 445               if (cmd)
 446                 {
 447                   if (!(cmd->func) (cmd, bsdargc, bsdargs))
 448                     {
 449                       kernel_type = KNETBSD;
 450                       return GRUB_ERR_NONE;
 451                     }
 452                 }
 453               grub_errno = GRUB_ERR_NONE;
 454             }
 455           if (kernel_type == GUESS_IT || kernel_type == KOPENBSD)
 456             {
 457               cmd = grub_command_find ("kopenbsd");
 458               if (cmd)
 459                 {
 460                   if (!(cmd->func) (cmd, bsdargc, bsdargs))
 461                     {
 462                       kernel_type = KOPENBSD;
 463                       return GRUB_ERR_NONE;
 464                     }
 465                 }
 466               grub_errno = GRUB_ERR_NONE;
 467             }
 468           if (bsdargs != cutargs)
 469             grub_free (bsdargs);
 470         }
 471       }
 472     }
 473   while (0);
 474
 475   return grub_error (GRUB_ERR_BAD_OS, "couldn't load file %s",
 476                      args[0]);
 477 }
 478
 479 static grub_err_t
 480 grub_cmd_legacy_initrd (struct grub_command *mycmd __attribute__ ((unused)),
 481                         int argc, char **args)
 482 {
 483   struct grub_command *cmd;
 484
 485   if (kernel_type == LINUX)
 486     {
 487 #ifdef GRUB_MACHINE_PCBIOS
 488       cmd = grub_command_find ("initrd16");
 489 #else
 490       cmd = grub_command_find ("initrd");
 491 #endif
 492       if (!cmd)
 493         return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("can't find command `%s'"),
 494 #ifdef GRUB_MACHINE_PCBIOS
 495                            "initrd16"
 496 #else
 497                            "initrd"
 498 #endif
 499                            );
 500
 501       return cmd->func (cmd, argc, args);
 502     }
 503   if (kernel_type == MULTIBOOT)
 504     {
 505       cmd = grub_command_find ("module");
 506       if (!cmd)
 507         return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("can't find command `%s'"),
 508                            "module");
 509
 510       return cmd->func (cmd, argc, args);
 511     }
 512
 513   return grub_error (GRUB_ERR_BAD_ARGUMENT,
 514                      N_("you need to load the kernel first"));
 515 }
 516
 517 static grub_err_t
 518 grub_cmd_legacy_initrdnounzip (struct grub_command *mycmd __attribute__ ((unused)),
 519                                int argc, char **args)
 520 {
 521   struct grub_command *cmd;
 522
 523   if (kernel_type == LINUX)
 524     {
 525       cmd = grub_command_find ("initrd16");
 526       if (!cmd)
 527         return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("can't find command `%s'"),
 528                            "initrd16");
 529
 530       return cmd->func (cmd, argc, args);
 531     }
 532   if (kernel_type == MULTIBOOT)
 533     {
 534       char **newargs;
 535       grub_err_t err;
 536       char nounzipbuf[10] = "--nounzip";
 537       newargs = grub_malloc ((argc + 1) * sizeof (newargs[0]));
 538       if (!newargs)
 539         return grub_errno;
 540       grub_memcpy (newargs + 1, args, argc * sizeof (newargs[0]));
 541       newargs[0] = nounzipbuf;
 542       cmd = grub_command_find ("module");
 543       if (!cmd)
 544         return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("can't find command `%s'"),
 545                            "module");
 546
 547       err = cmd->func (cmd, argc + 1, newargs);
 548       grub_free (newargs);
 549       return err;
 550     }
 551
 552   return grub_error (GRUB_ERR_BAD_ARGUMENT,
 553                      N_("you need to load the kernel first"));
 554 }
 555
 556 static grub_err_t
 557 check_password_deny (const char *user __attribute__ ((unused)),
 558                      const char *entered  __attribute__ ((unused)),
 559                      void *password __attribute__ ((unused)))
 560 {
 561   return GRUB_ACCESS_DENIED;
 562 }
 563
 564 #define MD5_HASHLEN 16
 565
 566 struct legacy_md5_password
 567 {
 568   grub_uint8_t *salt;
 569   int saltlen;
 570   grub_uint8_t hash[MD5_HASHLEN];
 571 };
 572
 573 static int
 574 check_password_md5_real (const char *entered,
 575                          struct legacy_md5_password *pw)
 576 {
 577   grub_size_t enteredlen = grub_strlen (entered);
 578   unsigned char alt_result[MD5_HASHLEN];
 579   unsigned char *digest;
 580   grub_uint8_t *ctx;
 581   grub_size_t i;
 582   int ret;
 583
 584   ctx = grub_zalloc (GRUB_MD_MD5->contextsize);
 585   if (!ctx)
 586     return 0;
 587
 588   GRUB_MD_MD5->init (ctx);
 589   GRUB_MD_MD5->write (ctx, entered, enteredlen);
 590   GRUB_MD_MD5->write (ctx, pw->salt + 3, pw->saltlen - 3);
 591   GRUB_MD_MD5->write (ctx, entered, enteredlen);
 592   digest = GRUB_MD_MD5->read (ctx);
 593   GRUB_MD_MD5->final (ctx);
 594   grub_memcpy (alt_result, digest, MD5_HASHLEN);
 595
 596   GRUB_MD_MD5->init (ctx);
 597   GRUB_MD_MD5->write (ctx, entered, enteredlen);
 598   GRUB_MD_MD5->write (ctx, pw->salt, pw->saltlen); /* include the $1$ header */
 599   for (i = enteredlen; i > 16; i -= 16)
 600     GRUB_MD_MD5->write (ctx, alt_result, 16);
 601   GRUB_MD_MD5->write (ctx, alt_result, i);
 602
 603   for (i = enteredlen; i > 0; i >>= 1)
 604     GRUB_MD_MD5->write (ctx, entered + ((i & 1) ? enteredlen : 0), 1);
 605   digest = GRUB_MD_MD5->read (ctx);
 606   GRUB_MD_MD5->final (ctx);
 607
 608   for (i = 0; i < 1000; i++)
 609     {
 610       grub_memcpy (alt_result, digest, 16);
 611
 612       GRUB_MD_MD5->init (ctx);
 613       if ((i & 1) != 0)
 614         GRUB_MD_MD5->write (ctx, entered, enteredlen);
 615       else
 616         GRUB_MD_MD5->write (ctx, alt_result, 16);
 617
 618       if (i % 3 != 0)
 619         GRUB_MD_MD5->write (ctx, pw->salt + 3, pw->saltlen - 3);
 620
 621       if (i % 7 != 0)
 622         GRUB_MD_MD5->write (ctx, entered, enteredlen);
 623
 624       if ((i & 1) != 0)
 625         GRUB_MD_MD5->write (ctx, alt_result, 16);
 626       else
 627         GRUB_MD_MD5->write (ctx, entered, enteredlen);
 628       digest = GRUB_MD_MD5->read (ctx);
 629       GRUB_MD_MD5->final (ctx);
 630     }
 631
 632   ret = (grub_crypto_memcmp (digest, pw->hash, MD5_HASHLEN) == 0);
 633   grub_free (ctx);
 634   return ret;
 635 }
 636
 637 static grub_err_t
 638 check_password_md5 (const char *user,
 639                     const char *entered,
 640                     void *password)
 641 {
 642   if (!check_password_md5_real (entered, password))
 643     return GRUB_ACCESS_DENIED;
 644
 645   grub_auth_authenticate (user);
 646
 647   return GRUB_ERR_NONE;
 648 }
 649
 650 static inline int
 651 ib64t (char c)
 652 {
 653   if (c == '.')
 654     return 0;
 655   if (c == '/')
 656     return 1;
 657   if (c >= '0' && c <= '9')
 658     return c - '0' + 2;
 659   if (c >= 'A' && c <= 'Z')
 660     return c - 'A' + 12;
 661   if (c >= 'a' && c <= 'z')
 662     return c - 'a' + 38;
 663   return -1;
 664 }
 665
 666 static struct legacy_md5_password *
 667 parse_legacy_md5 (int argc, char **args)
 668 {
 669   const char *salt, *saltend;
 670   struct legacy_md5_password *pw = NULL;
 671   int i;
 672   const char *p;
 673
 674   if (grub_memcmp (args[0], "--md5", sizeof ("--md5")) != 0)
 675     goto fail;
 676   if (argc == 1)
 677     goto fail;
 678   if (grub_strlen(args[1]) <= 3)
 679     goto fail;
 680   salt = args[1];
 681   saltend = grub_strchr (salt + 3, '$');
 682   if (!saltend)
 683     goto fail;
 684   pw = grub_malloc (sizeof (*pw));
 685   if (!pw)
 686     goto fail;
 687
 688   p = saltend + 1;
 689   for (i = 0; i < 5; i++)
 690     {
 691       int n;
 692       grub_uint32_t w = 0;
 693
 694       for (n = 0; n < 4; n++)
 695         {
 696           int ww = ib64t(*p++);
 697           if (ww == -1)
 698             goto fail;
 699           w |= ww << (n * 6);
 700         }
 701       pw->hash[i == 4 ? 5 : 12+i] = w & 0xff;
 702       pw->hash[6+i] = (w >> 8) & 0xff;
 703       pw->hash[i] = (w >> 16) & 0xff;
 704     }
 705   {
 706     int n;
 707     grub_uint32_t w = 0;
 708     for (n = 0; n < 2; n++)
 709       {
 710         int ww = ib64t(*p++);
 711         if (ww == -1)
 712           goto fail;
 713         w |= ww << (6 * n);
 714       }
 715     if (w >= 0x100)
 716       goto fail;
 717     pw->hash[11] = w;
 718   }
 719
 720   pw->saltlen = saltend - salt;
 721   pw->salt = (grub_uint8_t *) grub_strndup (salt, pw->saltlen);
 722   if (!pw->salt)
 723     goto fail;
 724
 725   return pw;
 726
 727  fail:
 728   grub_free (pw);
 729   return NULL;
 730 }
 731
 732 static grub_err_t
 733 grub_cmd_legacy_password (struct grub_command *mycmd __attribute__ ((unused)),
 734                           int argc, char **args)
 735 {
 736   struct legacy_md5_password *pw = NULL;
 737
 738   if (argc == 0)
 739     return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("one argument expected"));
 740   if (args[0][0] != '-' || args[0][1] != '-')
 741     return grub_normal_set_password ("legacy", args[0]);
 742
 743   pw = parse_legacy_md5 (argc, args);
 744
 745   if (pw)
 746     return grub_auth_register_authentication ("legacy", check_password_md5, pw);
 747   else
 748     /* This is to imitate minor difference between grub-legacy in GRUB2.
 749        If 2 password commands are executed in a row and second one fails
 750        on GRUB2 the password of first one is used, whereas in grub-legacy
 751        authenthication is denied. In case of no password command was executed
 752        early both versions deny any access.  */
 753     return grub_auth_register_authentication ("legacy", check_password_deny,
 754                                               NULL);
 755 }
 756
 757 int
 758 grub_legacy_check_md5_password (int argc, char **args,
 759                                 char *entered)
 760 {
 761   struct legacy_md5_password *pw = NULL;
 762   int ret;
 763
 764   if (args[0][0] != '-' || args[0][1] != '-')
 765     {
 766       char correct[GRUB_AUTH_MAX_PASSLEN];
 767
 768       grub_memset (correct, 0, sizeof (correct));
 769       grub_strncpy (correct, args[0], sizeof (correct));
 770
 771       return grub_crypto_memcmp (entered, correct, GRUB_AUTH_MAX_PASSLEN) == 0;
 772     }
 773
 774   pw = parse_legacy_md5 (argc, args);
 775
 776   if (!pw)
 777     return 0;
 778
 779   ret = check_password_md5_real (entered, pw);
 780   grub_free (pw);
 781   return ret;
 782 }
 783
 784 static grub_err_t
 785 grub_cmd_legacy_check_password (struct grub_command *mycmd __attribute__ ((unused)),
 786                                 int argc, char **args)
 787 {
 788   char entered[GRUB_AUTH_MAX_PASSLEN];
 789
 790   if (argc == 0)
 791     return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("one argument expected"));
 792   grub_puts_ (N_("Enter password: "));
 793   if (!grub_password_get (entered, GRUB_AUTH_MAX_PASSLEN))
 794     return GRUB_ACCESS_DENIED;
 795
 796   if (!grub_legacy_check_md5_password (argc, args,
 797                                        entered))
 798     return GRUB_ACCESS_DENIED;
 799
 800   return GRUB_ERR_NONE;
 801 }
 802
 803 static grub_command_t cmd_source, cmd_configfile;
 804 static grub_command_t cmd_source_extract, cmd_configfile_extract;
 805 static grub_command_t cmd_kernel, cmd_initrd, cmd_initrdnounzip;
 806 static grub_command_t cmd_password, cmd_check_password;
 807
 808 GRUB_MOD_INIT(legacycfg)
 809 {
 810   cmd_source
 811     = grub_register_command ("legacy_source",
 812                              grub_cmd_legacy_source,
 813                              N_("FILE"),
 814                              /* TRANSLATORS: "legacy config" means
 815                                 "config as used by grub-legacy".  */
 816                              N_("Parse legacy config in same context"));
 817   cmd_configfile
 818     = grub_register_command ("legacy_configfile",
 819                              grub_cmd_legacy_source,
 820                              N_("FILE"),
 821                              N_("Parse legacy config in new context"));
 822   cmd_source_extract
 823     = grub_register_command ("extract_legacy_entries_source",
 824                              grub_cmd_legacy_source,
 825                              N_("FILE"),
 826                              N_("Parse legacy config in same context taking only menu entries"));
 827   cmd_configfile_extract
 828     = grub_register_command ("extract_legacy_entries_configfile",
 829                              grub_cmd_legacy_source,
 830                              N_("FILE"),
 831                              N_("Parse legacy config in new context taking only menu entries"));
 832
 833   cmd_kernel = grub_register_command ("legacy_kernel",
 834                                       grub_cmd_legacy_kernel,
 835                                       N_("[--no-mem-option] [--type=TYPE] FILE [ARG ...]"),
 836                                       N_("Simulate grub-legacy `kernel' command"));
 837
 838   cmd_initrd = grub_register_command ("legacy_initrd",
 839                                       grub_cmd_legacy_initrd,
 840                                       N_("FILE [ARG ...]"),
 841                                       N_("Simulate grub-legacy `initrd' command"));
 842   cmd_initrdnounzip = grub_register_command ("legacy_initrd_nounzip",
 843                                              grub_cmd_legacy_initrdnounzip,
 844                                              N_("FILE [ARG ...]"),
 845                                              N_("Simulate grub-legacy `modulenounzip' command"));
 846
 847   cmd_password = grub_register_command ("legacy_password",
 848                                         grub_cmd_legacy_password,
 849                                         N_("[--md5] PASSWD [FILE]"),
 850                                         N_("Simulate grub-legacy `password' command"));
 851
 852   cmd_check_password = grub_register_command ("legacy_check_password",
 853                                               grub_cmd_legacy_check_password,
 854                                               N_("[--md5] PASSWD [FILE]"),
 855                                               N_("Simulate grub-legacy `password' command in menu entry mode"));
 856
 857 }
 858
 859 GRUB_MOD_FINI(legacycfg)
 860 {
 861   grub_unregister_command (cmd_source);
 862   grub_unregister_command (cmd_configfile);
 863   grub_unregister_command (cmd_source_extract);
 864   grub_unregister_command (cmd_configfile_extract);
 865
 866   grub_unregister_command (cmd_kernel);
 867   grub_unregister_command (cmd_initrd);
 868   grub_unregister_command (cmd_initrdnounzip);
 869
 870   grub_unregister_command (cmd_password);
 871   grub_unregister_command (cmd_check_password);
 872 }