Contents of /trunk/mkinitrd-magellan/busybox/util-linux/volume_id/luks.c
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Sun May 30 11:32:42 2010 UTC (14 years ago) by niro
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Sun May 30 11:32:42 2010 UTC (14 years ago) by niro
File MIME type: text/plain
File size: 2669 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
1 | /* |
2 | * volume_id - reads filesystem label and uuid |
3 | * |
4 | * Copyright (C) 2005 W. Michael Petullo <mike@flyn.org> |
5 | * |
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. |
10 | * |
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. |
15 | * |
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 |
19 | */ |
20 | |
21 | #include "volume_id_internal.h" |
22 | |
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 |
31 | |
32 | static const uint8_t LUKS_MAGIC[] = { 'L','U','K','S', 0xba, 0xbe }; |
33 | |
34 | struct luks_phdr { |
35 | uint8_t magic[LUKS_MAGIC_L]; |
36 | uint16_t version; |
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; |
41 | uint32_t keyBytes; |
42 | uint8_t mkDigest[LUKS_DIGESTSIZE]; |
43 | uint8_t mkDigestSalt[LUKS_SALTSIZE]; |
44 | uint32_t mkDigestIterations; |
45 | uint8_t uuid[UUID_STRING_L]; |
46 | struct { |
47 | uint32_t active; |
48 | uint32_t passwordIterations; |
49 | uint8_t passwordSalt[LUKS_SALTSIZE]; |
50 | uint32_t keyMaterialOffset; |
51 | uint32_t stripes; |
52 | } keyblock[LUKS_NUMKEYS]; |
53 | }; |
54 | |
55 | enum { |
56 | EXPECTED_SIZE_luks_phdr = 0 |
57 | + 1 * LUKS_MAGIC_L |
58 | + 2 |
59 | + 1 * LUKS_CIPHERNAME_L |
60 | + 1 * LUKS_CIPHERMODE_L |
61 | + 1 * LUKS_HASHSPEC_L |
62 | + 4 |
63 | + 4 |
64 | + 1 * LUKS_DIGESTSIZE |
65 | + 1 * LUKS_SALTSIZE |
66 | + 4 |
67 | + 1 * UUID_STRING_L |
68 | + LUKS_NUMKEYS * (0 |
69 | + 4 |
70 | + 4 |
71 | + 1 * LUKS_SALTSIZE |
72 | + 4 |
73 | + 4 |
74 | ) |
75 | }; |
76 | |
77 | struct BUG_bad_size_luks_phdr { |
78 | char BUG_bad_size_luks_phdr[ |
79 | sizeof(struct luks_phdr) == EXPECTED_SIZE_luks_phdr ? |
80 | 1 : -1]; |
81 | }; |
82 | |
83 | int FAST_FUNC volume_id_probe_luks(struct volume_id *id /*,uint64_t off*/) |
84 | { |
85 | #define off ((uint64_t)0) |
86 | struct luks_phdr *header; |
87 | |
88 | header = volume_id_get_buffer(id, off, sizeof(*header)); |
89 | if (header == NULL) |
90 | return -1; |
91 | |
92 | if (memcmp(header->magic, LUKS_MAGIC, LUKS_MAGIC_L)) |
93 | return -1; |
94 | |
95 | // volume_id_set_usage(id, VOLUME_ID_CRYPTO); |
96 | volume_id_set_uuid(id, header->uuid, UUID_DCE_STRING); |
97 | // id->type = "crypto_LUKS"; |
98 | |
99 | return 0; |
100 | } |