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/*
* TCRYPT (TrueCrypt-compatible) header definition
*
* Copyright (C) 2012-2021 Red Hat, Inc. All rights reserved.
* Copyright (C) 2012-2021 Milan Broz
*
* This file is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This file is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this file; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef _CRYPTSETUP_TCRYPT_H
#define _CRYPTSETUP_TCRYPT_H
#include <stdint.h>
#define TCRYPT_HDR_SALT_LEN 64
#define TCRYPT_HDR_IV_LEN 16
#define TCRYPT_HDR_LEN 448
#define TCRYPT_HDR_KEY_LEN 192
#define TCRYPT_HDR_MAGIC "TRUE"
#define VCRYPT_HDR_MAGIC "VERA"
#define TCRYPT_HDR_MAGIC_LEN 4
#define TCRYPT_HDR_HIDDEN_OFFSET_OLD -1536
#define TCRYPT_HDR_HIDDEN_OFFSET 65536
#define TCRYPT_HDR_HIDDEN_OFFSET_BCK -65536
#define TCRYPT_HDR_OFFSET_BCK -131072
#define TCRYPT_HDR_SYSTEM_OFFSET 31744
#define TCRYPT_LRW_IKEY_LEN 16
#define TCRYPT_KEY_POOL_LEN 64
#define VCRYPT_KEY_POOL_LEN 128
#define TCRYPT_KEYFILE_LEN 1048576
#define TCRYPT_HDR_FLAG_SYSTEM (1 << 0)
#define TCRYPT_HDR_FLAG_NONSYSTEM (1 << 1)
struct tcrypt_phdr {
char salt[TCRYPT_HDR_SALT_LEN];
/* encrypted part, TCRYPT_HDR_LEN bytes */
union {
struct __attribute__((__packed__)) {
char magic[TCRYPT_HDR_MAGIC_LEN];
uint16_t version;
uint16_t version_tc;
uint32_t keys_crc32;
uint64_t _reserved1[2]; /* data/header ctime */
uint64_t hidden_volume_size;
uint64_t volume_size;
uint64_t mk_offset;
uint64_t mk_size;
uint32_t flags;
uint32_t sector_size;
uint8_t _reserved2[120];
uint32_t header_crc32;
char keys[256];
} d;
char e[TCRYPT_HDR_LEN];
};
} __attribute__((__packed__));
struct crypt_device;
struct crypt_params_tcrypt;
struct crypt_dm_active_device;
struct dm_target;
struct volume_key;
struct device;
int TCRYPT_read_phdr(struct crypt_device *cd,
struct tcrypt_phdr *hdr,
struct crypt_params_tcrypt *params);
int TCRYPT_init_by_name(struct crypt_device *cd, const char *name,
const char *uuid,
const struct dm_target *tgt,
struct device **device,
struct crypt_params_tcrypt *tcrypt_params,
struct tcrypt_phdr *tcrypt_hdr);
int TCRYPT_activate(struct crypt_device *cd,
const char *name,
struct tcrypt_phdr *hdr,
struct crypt_params_tcrypt *params,
uint32_t flags);
int TCRYPT_deactivate(struct crypt_device *cd,
const char *name,
uint32_t flags);
uint64_t TCRYPT_get_data_offset(struct crypt_device *cd,
struct tcrypt_phdr *hdr,
struct crypt_params_tcrypt *params);
uint64_t TCRYPT_get_iv_offset(struct crypt_device *cd,
struct tcrypt_phdr *hdr,
struct crypt_params_tcrypt *params);
int TCRYPT_get_volume_key(struct crypt_device *cd,
struct tcrypt_phdr *hdr,
struct crypt_params_tcrypt *params,
struct volume_key **vk);
int TCRYPT_dump(struct crypt_device *cd,
struct tcrypt_phdr *hdr,
struct crypt_params_tcrypt *params);
#endif
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