2 * TCRYPT (TrueCrypt-compatible) header defitinion
4 * Copyright (C) 2012, Red Hat, Inc. All rights reserved.
5 * Copyright (C) 2012, Milan Broz
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 #include "libcryptsetup.h"
23 #ifndef _CRYPTSETUP_TCRYPT_H
24 #define _CRYPTSETUP_TCRYPT_H
26 #define TCRYPT_HDR_SALT_LEN 64
27 #define TCRYPT_HDR_IV_LEN 16
28 #define TCRYPT_HDR_LEN 448
29 #define TCRYPT_HDR_KEY_LEN 192
30 #define TCRYPT_HDR_MAGIC "TRUE"
31 #define TCRYPT_HDR_MAGIC_LEN 4
33 #define TCRYPT_HDR_HIDDEN_OFFSET_OLD -1536
34 #define TCRYPT_HDR_HIDDEN_OFFSET 65536
36 #define TCRYPT_HDR_HIDDEN_OFFSET_BCK -65536
37 #define TCRYPT_HDR_OFFSET_BCK -131072
39 #define TCRYPT_HDR_SYSTEM_OFFSET 31744
41 #define TCRYPT_LRW_IKEY_LEN 16
42 #define TCRYPT_KEY_POOL_LEN 64
43 #define TCRYPT_KEYFILE_LEN 1048576
45 #define TCRYPT_HDR_FLAG_SYSTEM (1 << 0)
46 #define TCRYPT_HDR_FLAG_NONSYSTEM (1 << 1)
49 char salt[TCRYPT_HDR_SALT_LEN];
51 /* encrypted part, TCRYPT_HDR_LEN bytes */
53 struct __attribute__((__packed__)) {
54 char magic[TCRYPT_HDR_MAGIC_LEN];
58 uint64_t _reserved1[2]; /* data/header ctime */
59 uint64_t hidden_volume_size;
65 uint8_t _reserved2[120];
66 uint32_t header_crc32;
69 char e[TCRYPT_HDR_LEN];
71 } __attribute__((__packed__));
73 struct crypt_dm_active_device;
77 int TCRYPT_read_phdr(struct crypt_device *cd,
78 struct tcrypt_phdr *hdr,
79 struct crypt_params_tcrypt *params);
81 int TCRYPT_init_by_name(struct crypt_device *cd, const char *name,
82 const struct crypt_dm_active_device *dmd,
83 struct device **device,
84 struct crypt_params_tcrypt *tcrypt_params,
85 struct tcrypt_phdr *tcrypt_hdr);
87 int TCRYPT_activate(struct crypt_device *cd,
89 struct tcrypt_phdr *hdr,
90 struct crypt_params_tcrypt *params,
93 int TCRYPT_deactivate(struct crypt_device *cd,
96 uint64_t TCRYPT_get_data_offset(struct crypt_device *cd,
97 struct tcrypt_phdr *hdr,
98 struct crypt_params_tcrypt *params);
100 uint64_t TCRYPT_get_iv_offset(struct crypt_device *cd,
101 struct tcrypt_phdr *hdr,
102 struct crypt_params_tcrypt *params);
104 int TCRYPT_get_volume_key(struct crypt_device *cd,
105 struct tcrypt_phdr *hdr,
106 struct crypt_params_tcrypt *params,
107 struct volume_key **vk);
109 int TCRYPT_dump(struct crypt_device *cd,
110 struct tcrypt_phdr *hdr,
111 struct crypt_params_tcrypt *params);