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/* xnu_uuid.c - transform 64-bit serial number
to 128-bit uuid suitable for xnu. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1995,1996,1998,1999,2001,2002,
* 2003, 2009 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/types.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/err.h>
#include <grub/dl.h>
#include <grub/device.h>
#include <grub/disk.h>
#include <grub/fs.h>
#include <grub/file.h>
#include <grub/misc.h>
#include <grub/env.h>
#include <grub/command.h>
#include <grub/i18n.h>
#include <grub/crypto.h>
GRUB_MOD_LICENSE ("GPLv3+");
/* This prefix is used by xnu and boot-132 to hash
together with volume serial. */
static grub_uint8_t hash_prefix[16]
= {0xB3, 0xE2, 0x0F, 0x39, 0xF2, 0x92, 0x11, 0xD6,
0x97, 0xA4, 0x00, 0x30, 0x65, 0x43, 0xEC, 0xAC};
static grub_err_t
grub_cmd_xnu_uuid (grub_command_t cmd __attribute__ ((unused)),
int argc, char **args)
{
grub_uint64_t serial;
grub_uint8_t *xnu_uuid;
char uuid_string[sizeof ("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")];
char *ptr;
void *ctx;
int low = 0;
if (argc < 1)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "UUID required");
if (argc > 1 && grub_strcmp (args[0], "-l") == 0)
{
low = 1;
argc--;
args++;
}
serial = grub_cpu_to_be64 (grub_strtoull (args[0], 0, 16));
ctx = grub_zalloc (GRUB_MD_MD5->contextsize);
if (!ctx)
return grub_errno;
GRUB_MD_MD5->init (ctx);
GRUB_MD_MD5->write (ctx, hash_prefix, sizeof (hash_prefix));
GRUB_MD_MD5->write (ctx, &serial, sizeof (serial));
GRUB_MD_MD5->final (ctx);
xnu_uuid = GRUB_MD_MD5->read (ctx);
grub_snprintf (uuid_string, sizeof (uuid_string),
"%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
(unsigned int) xnu_uuid[0], (unsigned int) xnu_uuid[1],
(unsigned int) xnu_uuid[2], (unsigned int) xnu_uuid[3],
(unsigned int) xnu_uuid[4], (unsigned int) xnu_uuid[5],
(unsigned int) ((xnu_uuid[6] & 0xf) | 0x30),
(unsigned int) xnu_uuid[7],
(unsigned int) ((xnu_uuid[8] & 0x3f) | 0x80),
(unsigned int) xnu_uuid[9],
(unsigned int) xnu_uuid[10], (unsigned int) xnu_uuid[11],
(unsigned int) xnu_uuid[12], (unsigned int) xnu_uuid[13],
(unsigned int) xnu_uuid[14], (unsigned int) xnu_uuid[15]);
if (!low)
for (ptr = uuid_string; *ptr; ptr++)
*ptr = grub_toupper (*ptr);
if (argc == 1)
grub_printf ("%s\n", uuid_string);
if (argc > 1)
grub_env_set (args[1], uuid_string);
grub_free (ctx);
return GRUB_ERR_NONE;
}
static grub_command_t cmd;
GRUB_MOD_INIT (xnu_uuid)
{
cmd = grub_register_command ("xnu_uuid", grub_cmd_xnu_uuid,
/* TRANSLATORS: GRUBUUID stands for "filesystem
UUID as used in GRUB". */
N_("[-l] GRUBUUID [VARNAME]"),
N_("Transform 64-bit UUID to format "
"suitable for XNU. If -l is given keep "
"it lowercase as done by blkid."));
}
GRUB_MOD_FINI (xnu_uuid)
{
grub_unregister_command (cmd);
}
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