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
21 #include "volume_id_internal.h"
23 #define LUKS_MAGIC_L 6
24 #define UUID_STRING_L 40
25 #define LUKS_CIPHERNAME_L 32
26 #define LUKS_CIPHERMODE_L 32
27 #define LUKS_HASHSPEC_L 32
28 #define LUKS_DIGESTSIZE 20
29 #define LUKS_SALTSIZE 32
30 #define LUKS_NUMKEYS 8
32 static const uint8_t LUKS_MAGIC
[] = { 'L','U','K','S', 0xba, 0xbe };
35 uint8_t magic
[LUKS_MAGIC_L
];
37 uint8_t cipherName
[LUKS_CIPHERNAME_L
];
38 uint8_t cipherMode
[LUKS_CIPHERMODE_L
];
39 uint8_t hashSpec
[LUKS_HASHSPEC_L
];
40 uint32_t payloadOffset
;
42 uint8_t mkDigest
[LUKS_DIGESTSIZE
];
43 uint8_t mkDigestSalt
[LUKS_SALTSIZE
];
44 uint32_t mkDigestIterations
;
45 uint8_t uuid
[UUID_STRING_L
];
48 uint32_t passwordIterations
;
49 uint8_t passwordSalt
[LUKS_SALTSIZE
];
50 uint32_t keyMaterialOffset
;
52 } keyblock
[LUKS_NUMKEYS
];
56 EXPECTED_SIZE_luks_phdr
= 0
59 + 1 * LUKS_CIPHERNAME_L
60 + 1 * LUKS_CIPHERMODE_L
77 struct BUG_bad_size_luks_phdr
{
78 char BUG_bad_size_luks_phdr
[
79 sizeof(struct luks_phdr
) == EXPECTED_SIZE_luks_phdr
?
83 int FAST_FUNC
volume_id_probe_luks(struct volume_id
*id
/*,uint64_t off*/)
85 #define off ((uint64_t)0)
86 struct luks_phdr
*header
;
88 header
= volume_id_get_buffer(id
, off
, sizeof(*header
));
92 if (memcmp(header
->magic
, LUKS_MAGIC
, LUKS_MAGIC_L
))
95 // volume_id_set_usage(id, VOLUME_ID_CRYPTO);
96 volume_id_set_uuid(id
, header
->uuid
, UUID_DCE_STRING
);
97 IF_FEATURE_BLKID_TYPE(id
->type
= "crypto_LUKS";)