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