2 * volume_id - reads filesystem label and uuid
4 * Copyright (C) 2005 W. Michael Petullo <mike@flyn.org>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 //config:config FEATURE_VOLUMEID_LUKS
21 //config: bool "luks filesystem"
23 //config: depends on VOLUMEID
25 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_LUKS) += luks.o
27 #include "volume_id_internal.h"
29 #define LUKS_MAGIC_L 6
30 #define UUID_STRING_L 40
31 #define LUKS_CIPHERNAME_L 32
32 #define LUKS_CIPHERMODE_L 32
33 #define LUKS_HASHSPEC_L 32
34 #define LUKS_DIGESTSIZE 20
35 #define LUKS_SALTSIZE 32
36 #define LUKS_NUMKEYS 8
38 static const uint8_t LUKS_MAGIC[] ALIGN1 = { 'L','U','K','S', 0xba, 0xbe };
41 uint8_t magic[LUKS_MAGIC_L];
43 uint8_t cipherName[LUKS_CIPHERNAME_L];
44 uint8_t cipherMode[LUKS_CIPHERMODE_L];
45 uint8_t hashSpec[LUKS_HASHSPEC_L];
46 uint32_t payloadOffset;
48 uint8_t mkDigest[LUKS_DIGESTSIZE];
49 uint8_t mkDigestSalt[LUKS_SALTSIZE];
50 uint32_t mkDigestIterations;
51 uint8_t uuid[UUID_STRING_L];
54 uint32_t passwordIterations;
55 uint8_t passwordSalt[LUKS_SALTSIZE];
56 uint32_t keyMaterialOffset;
58 } keyblock[LUKS_NUMKEYS];
62 EXPECTED_SIZE_luks_phdr = 0
65 + 1 * LUKS_CIPHERNAME_L
66 + 1 * LUKS_CIPHERMODE_L
83 struct BUG_bad_size_luks_phdr {
84 char BUG_bad_size_luks_phdr[
85 sizeof(struct luks_phdr) == EXPECTED_SIZE_luks_phdr ?
89 int FAST_FUNC volume_id_probe_luks(struct volume_id *id /*,uint64_t off*/)
91 #define off ((uint64_t)0)
92 struct luks_phdr *header;
94 header = volume_id_get_buffer(id, off, sizeof(*header));
98 if (memcmp(header->magic, LUKS_MAGIC, LUKS_MAGIC_L))
101 // volume_id_set_usage(id, VOLUME_ID_CRYPTO);
102 volume_id_set_uuid(id, header->uuid, UUID_DCE_STRING);
103 IF_FEATURE_BLKID_TYPE(id->type = "crypto_LUKS";)