100 lines
3.0 KiB
C
100 lines
3.0 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef GRUB_CRYPTODISK_HEADER
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#define GRUB_CRYPTODISK_HEADER 1
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#include <grub/disk.h>
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#include <grub/crypto.h>
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typedef enum
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{
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GRUB_CRYPTODISK_MODE_ECB,
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GRUB_CRYPTODISK_MODE_CBC,
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GRUB_CRYPTODISK_MODE_PCBC,
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GRUB_CRYPTODISK_MODE_XTS,
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GRUB_CRYPTODISK_MODE_LRW
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} grub_cryptodisk_mode_t;
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typedef enum
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{
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GRUB_CRYPTODISK_MODE_IV_NULL,
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GRUB_CRYPTODISK_MODE_IV_PLAIN,
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GRUB_CRYPTODISK_MODE_IV_PLAIN64,
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GRUB_CRYPTODISK_MODE_IV_ESSIV,
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GRUB_CRYPTODISK_MODE_IV_BENBI,
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GRUB_CRYPTODISK_MODE_IV_BYTECOUNT64_HASH
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} grub_cryptodisk_mode_iv_t;
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#define GRUB_CRYPTODISK_MAX_UUID_LENGTH 63
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#define GRUB_CRYPTODISK_GF_SIZE 128
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#define GRUB_CRYPTODISK_GF_BYTES (GRUB_CRYPTODISK_GF_SIZE / 8)
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struct grub_cryptodisk
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{
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char *source;
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grub_disk_addr_t offset;
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grub_disk_addr_t total_length;
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grub_disk_t source_disk;
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int ref;
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grub_crypto_cipher_handle_t cipher;
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grub_crypto_cipher_handle_t secondary_cipher;
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grub_crypto_cipher_handle_t essiv_cipher;
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const gcry_md_spec_t *essiv_hash, *hash, *iv_hash;
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grub_cryptodisk_mode_t mode;
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grub_cryptodisk_mode_iv_t mode_iv;
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int benbi_log;
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unsigned long id, source_id;
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enum grub_disk_dev_id source_dev_id;
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char uuid[GRUB_CRYPTODISK_MAX_UUID_LENGTH + 1];
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grub_uint8_t lrw_key[GRUB_CRYPTODISK_GF_BYTES];
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grub_uint8_t *lrw_precalc;
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grub_uint8_t iv_prefix[64];
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grub_size_t iv_prefix_len;
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#ifdef GRUB_UTIL
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char *cheat;
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int cheat_fd;
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#endif
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struct grub_cryptodisk *next;
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};
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typedef struct grub_cryptodisk *grub_cryptodisk_t;
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gcry_err_code_t
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grub_cryptodisk_setkey (grub_cryptodisk_t dev,
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grub_uint8_t *key, grub_size_t keysize);
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gcry_err_code_t
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grub_cryptodisk_decrypt (const struct grub_cryptodisk *dev,
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grub_uint8_t * data, grub_size_t len,
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grub_disk_addr_t sector);
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grub_err_t
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grub_cryptodisk_insert (grub_cryptodisk_t newdev, const char *name,
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grub_disk_t source);
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#ifdef GRUB_UTIL
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grub_err_t
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grub_cryptodisk_cheat_insert (grub_cryptodisk_t newdev, const char *name,
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grub_disk_t source, const char *cheat);
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void
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grub_util_cryptodisk_print_abstraction (grub_disk_t disk);
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#endif
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grub_cryptodisk_t grub_cryptodisk_get_by_uuid (const char *uuid);
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grub_cryptodisk_t grub_cryptodisk_get_by_source_disk (grub_disk_t disk);
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#endif
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