2 * LUKS - Linux Unified Key Setup
4 * Copyright (C) 2004-2006, Clemens Fruhwirth <clemens@endorphin.org>
5 * Copyright (C) 2009-2012, Red Hat, Inc. All rights reserved.
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * version 2 as published by the Free Software Foundation.
11 * This program 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
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 #ifndef INCLUDED_CRYPTSETUP_LUKS_LUKS_H
22 #define INCLUDED_CRYPTSETUP_LUKS_LUKS_H
25 * LUKS partition header
28 #include "libcryptsetup.h"
30 #define LUKS_CIPHERNAME_L 32
31 #define LUKS_CIPHERMODE_L 32
32 #define LUKS_HASHSPEC_L 32
33 #define LUKS_DIGESTSIZE 20 // since SHA1
34 #define LUKS_HMACSIZE 32
35 #define LUKS_SALTSIZE 32
36 #define LUKS_NUMKEYS 8
38 // Minimal number of iterations
39 #define LUKS_MKD_ITERATIONS_MIN 1000
40 #define LUKS_SLOT_ITERATIONS_MIN 1000
42 #define LUKS_KEY_DISABLED_OLD 0
43 #define LUKS_KEY_ENABLED_OLD 0xCAFE
45 #define LUKS_KEY_DISABLED 0x0000DEAD
46 #define LUKS_KEY_ENABLED 0x00AC71F3
48 #define LUKS_STRIPES 4000
50 // partition header starts with magic
51 #define LUKS_MAGIC {'L','U','K','S', 0xba, 0xbe};
52 #define LUKS_MAGIC_L 6
54 /* Actually we need only 37, but we don't want struct autoaligning to kick in */
55 #define UUID_STRING_L 40
57 /* Offset to keyslot area [in bytes] */
58 #define LUKS_ALIGN_KEYSLOTS 4096
60 /* Any integer values are stored in network byte order on disk and must be
64 struct device_backend;
67 char magic[LUKS_MAGIC_L];
69 char cipherName[LUKS_CIPHERNAME_L];
70 char cipherMode[LUKS_CIPHERMODE_L];
71 char hashSpec[LUKS_HASHSPEC_L];
72 uint32_t payloadOffset;
74 char mkDigest[LUKS_DIGESTSIZE];
75 char mkDigestSalt[LUKS_SALTSIZE];
76 uint32_t mkDigestIterations;
77 char uuid[UUID_STRING_L];
82 /* parameters used for password processing */
83 uint32_t passwordIterations;
84 char passwordSalt[LUKS_SALTSIZE];
86 /* parameters used for AF store/load */
87 uint32_t keyMaterialOffset;
89 } keyblock[LUKS_NUMKEYS];
91 /* Align it to 512 sector size */
95 int LUKS_verify_volume_key(const struct luks_phdr *hdr,
96 const struct volume_key *vk);
98 int LUKS_generate_phdr(
99 struct luks_phdr *header,
100 const struct volume_key *vk,
101 const char *cipherName,
102 const char *cipherMode,
103 const char *hashSpec,
105 unsigned int stripes,
106 unsigned int alignPayload,
107 unsigned int alignOffset,
108 uint32_t iteration_time_ms,
109 uint64_t *PBKDF2_per_sec,
110 int detached_metadata_device,
111 struct crypt_device *ctx);
114 struct luks_phdr *hdr,
115 int require_luks_device,
117 struct crypt_device *ctx);
119 int LUKS_read_phdr_backup(
120 const char *backup_file,
121 struct luks_phdr *hdr,
122 int require_luks_device,
123 struct crypt_device *ctx);
125 int LUKS_hdr_uuid_set(
126 struct luks_phdr *hdr,
128 struct crypt_device *ctx);
131 const char *backup_file,
132 struct luks_phdr *hdr,
133 struct crypt_device *ctx);
135 int LUKS_hdr_restore(
136 const char *backup_file,
137 struct luks_phdr *hdr,
138 struct crypt_device *ctx);
141 struct luks_phdr *hdr,
142 struct crypt_device *ctx);
145 unsigned int keyIndex,
146 const char *password,
148 struct luks_phdr *hdr,
149 struct volume_key *vk,
150 uint32_t iteration_time_ms,
151 uint64_t *PBKDF2_per_sec,
152 struct crypt_device *ctx);
154 int LUKS_open_key_with_hdr(
156 const char *password,
158 struct luks_phdr *hdr,
159 struct volume_key **vk,
160 struct crypt_device *ctx);
163 unsigned int keyIndex,
164 struct luks_phdr *hdr,
165 struct crypt_device *ctx);
167 crypt_keyslot_info LUKS_keyslot_info(struct luks_phdr *hdr, int keyslot);
168 int LUKS_keyslot_find_empty(struct luks_phdr *hdr);
169 int LUKS_keyslot_active_count(struct luks_phdr *hdr);
170 int LUKS_keyslot_set(struct luks_phdr *hdr, int keyslot, int enable);
172 int LUKS_encrypt_to_storage(
173 char *src, size_t srcLength,
174 struct luks_phdr *hdr,
175 struct volume_key *vk,
177 struct crypt_device *ctx);
179 int LUKS_decrypt_from_storage(
180 char *dst, size_t dstLength,
181 struct luks_phdr *hdr,
182 struct volume_key *vk,
184 struct crypt_device *ctx);
186 int LUKS1_activate(struct crypt_device *cd,
188 struct volume_key *vk,