diff options
Diffstat (limited to 'grub-core/commands/xnu_uuid.c')
| -rw-r--r-- | grub-core/commands/xnu_uuid.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/grub-core/commands/xnu_uuid.c b/grub-core/commands/xnu_uuid.c new file mode 100644 index 0000000..ae4b3a4 --- /dev/null +++ b/grub-core/commands/xnu_uuid.c @@ -0,0 +1,119 @@ +/* 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); +} |