mirror of
https://gitlab.com/cryptsetup/cryptsetup.git
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32d5e59ab6
This can be used in some automated systems and allows device to be removed after the last user mapping closes it.
117 lines
3.3 KiB
C
117 lines
3.3 KiB
C
/*
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* TCRYPT (TrueCrypt-compatible) header defitinion
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*
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* Copyright (C) 2012-2017, Red Hat, Inc. All rights reserved.
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* Copyright (C) 2012-2017, Milan Broz
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*
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* This file is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This file is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this file; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "libcryptsetup.h"
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#ifndef _CRYPTSETUP_TCRYPT_H
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#define _CRYPTSETUP_TCRYPT_H
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#define TCRYPT_HDR_SALT_LEN 64
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#define TCRYPT_HDR_IV_LEN 16
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#define TCRYPT_HDR_LEN 448
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#define TCRYPT_HDR_KEY_LEN 192
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#define TCRYPT_HDR_MAGIC "TRUE"
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#define VCRYPT_HDR_MAGIC "VERA"
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#define TCRYPT_HDR_MAGIC_LEN 4
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#define TCRYPT_HDR_HIDDEN_OFFSET_OLD -1536
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#define TCRYPT_HDR_HIDDEN_OFFSET 65536
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#define TCRYPT_HDR_HIDDEN_OFFSET_BCK -65536
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#define TCRYPT_HDR_OFFSET_BCK -131072
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#define TCRYPT_HDR_SYSTEM_OFFSET 31744
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#define TCRYPT_LRW_IKEY_LEN 16
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#define TCRYPT_KEY_POOL_LEN 64
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#define TCRYPT_KEYFILE_LEN 1048576
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#define TCRYPT_HDR_FLAG_SYSTEM (1 << 0)
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#define TCRYPT_HDR_FLAG_NONSYSTEM (1 << 1)
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struct tcrypt_phdr {
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char salt[TCRYPT_HDR_SALT_LEN];
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/* encrypted part, TCRYPT_HDR_LEN bytes */
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union {
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struct __attribute__((__packed__)) {
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char magic[TCRYPT_HDR_MAGIC_LEN];
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uint16_t version;
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uint16_t version_tc;
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uint32_t keys_crc32;
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uint64_t _reserved1[2]; /* data/header ctime */
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uint64_t hidden_volume_size;
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uint64_t volume_size;
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uint64_t mk_offset;
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uint64_t mk_size;
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uint32_t flags;
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uint32_t sector_size;
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uint8_t _reserved2[120];
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uint32_t header_crc32;
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char keys[256];
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} d;
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char e[TCRYPT_HDR_LEN];
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};
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} __attribute__((__packed__));
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struct crypt_dm_active_device;
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struct volume_key;
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struct device;
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int TCRYPT_read_phdr(struct crypt_device *cd,
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struct tcrypt_phdr *hdr,
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struct crypt_params_tcrypt *params);
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int TCRYPT_init_by_name(struct crypt_device *cd, const char *name,
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const struct crypt_dm_active_device *dmd,
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struct device **device,
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struct crypt_params_tcrypt *tcrypt_params,
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struct tcrypt_phdr *tcrypt_hdr);
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int TCRYPT_activate(struct crypt_device *cd,
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const char *name,
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struct tcrypt_phdr *hdr,
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struct crypt_params_tcrypt *params,
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uint32_t flags);
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int TCRYPT_deactivate(struct crypt_device *cd,
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const char *name,
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uint32_t flags);
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uint64_t TCRYPT_get_data_offset(struct crypt_device *cd,
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struct tcrypt_phdr *hdr,
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struct crypt_params_tcrypt *params);
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uint64_t TCRYPT_get_iv_offset(struct crypt_device *cd,
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struct tcrypt_phdr *hdr,
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struct crypt_params_tcrypt *params);
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int TCRYPT_get_volume_key(struct crypt_device *cd,
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struct tcrypt_phdr *hdr,
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struct crypt_params_tcrypt *params,
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struct volume_key **vk);
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int TCRYPT_dump(struct crypt_device *cd,
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struct tcrypt_phdr *hdr,
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struct crypt_params_tcrypt *params);
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#endif
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