arch/all-pc/boot/grub2-aros/grub-core/commands/xnu_uuid.c

   1 /* xnu_uuid.c - transform 64-bit serial number
   2    to 128-bit uuid suitable for xnu. */
   3 /*
   4  *  GRUB  --  GRand Unified Bootloader
   5  *  Copyright (C) 1995,1996,1998,1999,2001,2002,
   6  *                2003, 2009  Free Software Foundation, Inc.
   7  *
   8  *  GRUB is free software: you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation, either version 3 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  GRUB is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include <grub/types.h>
  23 #include <grub/misc.h>
  24 #include <grub/mm.h>
  25 #include <grub/err.h>
  26 #include <grub/dl.h>
  27 #include <grub/device.h>
  28 #include <grub/disk.h>
  29 #include <grub/fs.h>
  30 #include <grub/file.h>
  31 #include <grub/misc.h>
  32 #include <grub/env.h>
  33 #include <grub/command.h>
  34 #include <grub/i18n.h>
  35 #include <grub/crypto.h>
  36
  37 GRUB_MOD_LICENSE ("GPLv3+");
  38
  39 /* This prefix is used by xnu and boot-132 to hash
  40    together with volume serial. */
  41 static grub_uint8_t hash_prefix[16]
  42   = {0xB3, 0xE2, 0x0F, 0x39, 0xF2, 0x92, 0x11, 0xD6,
  43      0x97, 0xA4, 0x00, 0x30, 0x65, 0x43, 0xEC, 0xAC};
  44
  45 static grub_err_t
  46 grub_cmd_xnu_uuid (grub_command_t cmd __attribute__ ((unused)),
  47                    int argc, char **args)
  48 {
  49   grub_uint64_t serial;
  50   grub_uint8_t *xnu_uuid;
  51   char uuid_string[sizeof ("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")];
  52   char *ptr;
  53   void *ctx;
  54   int low = 0;
  55
  56   if (argc < 1)
  57     return grub_error (GRUB_ERR_BAD_ARGUMENT, "UUID required");
  58
  59   if (argc > 1 && grub_strcmp (args[0], "-l") == 0)
  60     {
  61       low = 1;
  62       argc--;
  63       args++;
  64     }
  65
  66   serial = grub_cpu_to_be64 (grub_strtoull (args[0], 0, 16));
  67
  68   ctx = grub_zalloc (GRUB_MD_MD5->contextsize);
  69   if (!ctx)
  70     return grub_errno;
  71   GRUB_MD_MD5->init (ctx);
  72   GRUB_MD_MD5->write (ctx, hash_prefix, sizeof (hash_prefix));
  73   GRUB_MD_MD5->write (ctx, &serial, sizeof (serial));
  74   GRUB_MD_MD5->final (ctx);
  75   xnu_uuid = GRUB_MD_MD5->read (ctx);
  76
  77   grub_snprintf (uuid_string, sizeof (uuid_string),
  78                 "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
  79                 (unsigned int) xnu_uuid[0], (unsigned int) xnu_uuid[1],
  80                 (unsigned int) xnu_uuid[2], (unsigned int) xnu_uuid[3],
  81                 (unsigned int) xnu_uuid[4], (unsigned int) xnu_uuid[5],
  82                 (unsigned int) ((xnu_uuid[6] & 0xf) | 0x30),
  83                 (unsigned int) xnu_uuid[7],
  84                 (unsigned int) ((xnu_uuid[8] & 0x3f) | 0x80),
  85                 (unsigned int) xnu_uuid[9],
  86                 (unsigned int) xnu_uuid[10], (unsigned int) xnu_uuid[11],
  87                 (unsigned int) xnu_uuid[12], (unsigned int) xnu_uuid[13],
  88                 (unsigned int) xnu_uuid[14], (unsigned int) xnu_uuid[15]);
  89   if (!low)
  90     for (ptr = uuid_string; *ptr; ptr++)
  91       *ptr = grub_toupper (*ptr);
  92   if (argc == 1)
  93     grub_printf ("%s\n", uuid_string);
  94   if (argc > 1)
  95     grub_env_set (args[1], uuid_string);
  96
  97   grub_free (ctx);
  98
  99   return GRUB_ERR_NONE;
 100 }
 101
 102 static grub_command_t cmd;
 103
 104
 105 GRUB_MOD_INIT (xnu_uuid)
 106 {
 107   cmd = grub_register_command ("xnu_uuid", grub_cmd_xnu_uuid,
 108                                /* TRANSLATORS: GRUBUUID stands for "filesystem
 109                                   UUID as used in GRUB".  */
 110                                N_("[-l] GRUBUUID [VARNAME]"),
 111                                N_("Transform 64-bit UUID to format "
 112                                   "suitable for XNU. If -l is given keep "
 113                                   "it lowercase as done by blkid."));
 114 }
 115
 116 GRUB_MOD_FINI (xnu_uuid)
 117 {
 118   grub_unregister_command (cmd);
 119 }