2 * TCRYPT (TrueCrypt-compatible) header definition
4 * Copyright (C) 2012-2020 Red Hat, Inc. All rights reserved.
5 * Copyright (C) 2012-2020 Milan Broz
7 * This file is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This file is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this file; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 #ifndef _CRYPTSETUP_TCRYPT_H
23 #define _CRYPTSETUP_TCRYPT_H
27 #define TCRYPT_HDR_SALT_LEN 64
28 #define TCRYPT_HDR_IV_LEN 16
29 #define TCRYPT_HDR_LEN 448
30 #define TCRYPT_HDR_KEY_LEN 192
31 #define TCRYPT_HDR_MAGIC "TRUE"
32 #define VCRYPT_HDR_MAGIC "VERA"
33 #define TCRYPT_HDR_MAGIC_LEN 4
35 #define TCRYPT_HDR_HIDDEN_OFFSET_OLD -1536
36 #define TCRYPT_HDR_HIDDEN_OFFSET 65536
38 #define TCRYPT_HDR_HIDDEN_OFFSET_BCK -65536
39 #define TCRYPT_HDR_OFFSET_BCK -131072
41 #define TCRYPT_HDR_SYSTEM_OFFSET 31744
43 #define TCRYPT_LRW_IKEY_LEN 16
44 #define TCRYPT_KEY_POOL_LEN 64
45 #define VCRYPT_KEY_POOL_LEN 128
46 #define TCRYPT_KEYFILE_LEN 1048576
48 #define TCRYPT_HDR_FLAG_SYSTEM (1 << 0)
49 #define TCRYPT_HDR_FLAG_NONSYSTEM (1 << 1)
52 char salt[TCRYPT_HDR_SALT_LEN];
54 /* encrypted part, TCRYPT_HDR_LEN bytes */
56 struct __attribute__((__packed__)) {
57 char magic[TCRYPT_HDR_MAGIC_LEN];
61 uint64_t _reserved1[2]; /* data/header ctime */
62 uint64_t hidden_volume_size;
68 uint8_t _reserved2[120];
69 uint32_t header_crc32;
72 char e[TCRYPT_HDR_LEN];
74 } __attribute__((__packed__));
77 struct crypt_params_tcrypt;
78 struct crypt_dm_active_device;
83 int TCRYPT_read_phdr(struct crypt_device *cd,
84 struct tcrypt_phdr *hdr,
85 struct crypt_params_tcrypt *params);
87 int TCRYPT_init_by_name(struct crypt_device *cd, const char *name,
89 const struct dm_target *tgt,
90 struct device **device,
91 struct crypt_params_tcrypt *tcrypt_params,
92 struct tcrypt_phdr *tcrypt_hdr);
94 int TCRYPT_activate(struct crypt_device *cd,
96 struct tcrypt_phdr *hdr,
97 struct crypt_params_tcrypt *params,
100 int TCRYPT_deactivate(struct crypt_device *cd,
104 uint64_t TCRYPT_get_data_offset(struct crypt_device *cd,
105 struct tcrypt_phdr *hdr,
106 struct crypt_params_tcrypt *params);
108 uint64_t TCRYPT_get_iv_offset(struct crypt_device *cd,
109 struct tcrypt_phdr *hdr,
110 struct crypt_params_tcrypt *params);
112 int TCRYPT_get_volume_key(struct crypt_device *cd,
113 struct tcrypt_phdr *hdr,
114 struct crypt_params_tcrypt *params,
115 struct volume_key **vk);
117 int TCRYPT_dump(struct crypt_device *cd,
118 struct tcrypt_phdr *hdr,
119 struct crypt_params_tcrypt *params);