mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-11-05 20:35:44 +00:00
crypto: split LUKS header definitions off into file
This will allow unit testing code to use the structs. Reviewed-by: Richard W.M. Jones <rjones@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrangé
parent
b57151ac03
commit
36445acebd
2 changed files with 138 additions and 93 deletions
137
crypto/block-luks-priv.h
Normal file
137
crypto/block-luks-priv.h
Normal file
|
|
@ -0,0 +1,137 @@
|
|||
/*
|
||||
* QEMU Crypto block device encryption LUKS format
|
||||
*
|
||||
* Copyright (c) 2015-2016 Red Hat, Inc.
|
||||
*
|
||||
* This library 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 library 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 library; if not, see <http://www.gnu.org/licenses/>.
|
||||
*
|
||||
*/
|
||||
|
||||
#include "qemu/osdep.h"
|
||||
#include "qapi/error.h"
|
||||
#include "qemu/bswap.h"
|
||||
|
||||
#include "block-luks.h"
|
||||
|
||||
#include "crypto/hash.h"
|
||||
#include "crypto/afsplit.h"
|
||||
#include "crypto/pbkdf.h"
|
||||
#include "crypto/secret.h"
|
||||
#include "crypto/random.h"
|
||||
#include "qemu/uuid.h"
|
||||
|
||||
#include "qemu/coroutine.h"
|
||||
#include "qemu/bitmap.h"
|
||||
|
||||
/*
|
||||
* Reference for the LUKS format implemented here is
|
||||
*
|
||||
* docs/on-disk-format.pdf
|
||||
*
|
||||
* in 'cryptsetup' package source code
|
||||
*
|
||||
* This file implements the 1.2.1 specification, dated
|
||||
* Oct 16, 2011.
|
||||
*/
|
||||
|
||||
typedef struct QCryptoBlockLUKSHeader QCryptoBlockLUKSHeader;
|
||||
typedef struct QCryptoBlockLUKSKeySlot QCryptoBlockLUKSKeySlot;
|
||||
|
||||
|
||||
/* The following constants are all defined by the LUKS spec */
|
||||
#define QCRYPTO_BLOCK_LUKS_VERSION 1
|
||||
|
||||
#define QCRYPTO_BLOCK_LUKS_MAGIC_LEN 6
|
||||
#define QCRYPTO_BLOCK_LUKS_CIPHER_NAME_LEN 32
|
||||
#define QCRYPTO_BLOCK_LUKS_CIPHER_MODE_LEN 32
|
||||
#define QCRYPTO_BLOCK_LUKS_HASH_SPEC_LEN 32
|
||||
#define QCRYPTO_BLOCK_LUKS_DIGEST_LEN 20
|
||||
#define QCRYPTO_BLOCK_LUKS_SALT_LEN 32
|
||||
#define QCRYPTO_BLOCK_LUKS_UUID_LEN 40
|
||||
#define QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS 8
|
||||
#define QCRYPTO_BLOCK_LUKS_STRIPES 4000
|
||||
#define QCRYPTO_BLOCK_LUKS_MIN_SLOT_KEY_ITERS 1000
|
||||
#define QCRYPTO_BLOCK_LUKS_MIN_MASTER_KEY_ITERS 1000
|
||||
#define QCRYPTO_BLOCK_LUKS_KEY_SLOT_OFFSET 4096
|
||||
|
||||
#define QCRYPTO_BLOCK_LUKS_KEY_SLOT_DISABLED 0x0000DEAD
|
||||
#define QCRYPTO_BLOCK_LUKS_KEY_SLOT_ENABLED 0x00AC71F3
|
||||
|
||||
#define QCRYPTO_BLOCK_LUKS_SECTOR_SIZE 512LL
|
||||
|
||||
#define QCRYPTO_BLOCK_LUKS_DEFAULT_ITER_TIME_MS 2000
|
||||
#define QCRYPTO_BLOCK_LUKS_ERASE_ITERATIONS 40
|
||||
|
||||
static const char qcrypto_block_luks_magic[QCRYPTO_BLOCK_LUKS_MAGIC_LEN] = {
|
||||
'L', 'U', 'K', 'S', 0xBA, 0xBE
|
||||
};
|
||||
|
||||
/*
|
||||
* This struct is written to disk in big-endian format,
|
||||
* but operated upon in native-endian format.
|
||||
*/
|
||||
struct QCryptoBlockLUKSKeySlot {
|
||||
/* state of keyslot, enabled/disable */
|
||||
uint32_t active;
|
||||
/* iterations for PBKDF2 */
|
||||
uint32_t iterations;
|
||||
/* salt for PBKDF2 */
|
||||
uint8_t salt[QCRYPTO_BLOCK_LUKS_SALT_LEN];
|
||||
/* start sector of key material */
|
||||
uint32_t key_offset_sector;
|
||||
/* number of anti-forensic stripes */
|
||||
uint32_t stripes;
|
||||
};
|
||||
|
||||
/*
|
||||
* This struct is written to disk in big-endian format,
|
||||
* but operated upon in native-endian format.
|
||||
*/
|
||||
struct QCryptoBlockLUKSHeader {
|
||||
/* 'L', 'U', 'K', 'S', '0xBA', '0xBE' */
|
||||
char magic[QCRYPTO_BLOCK_LUKS_MAGIC_LEN];
|
||||
|
||||
/* LUKS version, currently 1 */
|
||||
uint16_t version;
|
||||
|
||||
/* cipher name specification (aes, etc) */
|
||||
char cipher_name[QCRYPTO_BLOCK_LUKS_CIPHER_NAME_LEN];
|
||||
|
||||
/* cipher mode specification (cbc-plain, xts-essiv:sha256, etc) */
|
||||
char cipher_mode[QCRYPTO_BLOCK_LUKS_CIPHER_MODE_LEN];
|
||||
|
||||
/* hash specification (sha256, etc) */
|
||||
char hash_spec[QCRYPTO_BLOCK_LUKS_HASH_SPEC_LEN];
|
||||
|
||||
/* start offset of the volume data (in 512 byte sectors) */
|
||||
uint32_t payload_offset_sector;
|
||||
|
||||
/* Number of key bytes */
|
||||
uint32_t master_key_len;
|
||||
|
||||
/* master key checksum after PBKDF2 */
|
||||
uint8_t master_key_digest[QCRYPTO_BLOCK_LUKS_DIGEST_LEN];
|
||||
|
||||
/* salt for master key PBKDF2 */
|
||||
uint8_t master_key_salt[QCRYPTO_BLOCK_LUKS_SALT_LEN];
|
||||
|
||||
/* iterations for master key PBKDF2 */
|
||||
uint32_t master_key_iterations;
|
||||
|
||||
/* UUID of the partition in standard ASCII representation */
|
||||
uint8_t uuid[QCRYPTO_BLOCK_LUKS_UUID_LEN];
|
||||
|
||||
/* key slots */
|
||||
QCryptoBlockLUKSKeySlot key_slots[QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS];
|
||||
};
|
||||
|
|
@ -23,6 +23,7 @@
|
|||
#include "qemu/bswap.h"
|
||||
|
||||
#include "block-luks.h"
|
||||
#include "block-luks-priv.h"
|
||||
|
||||
#include "crypto/hash.h"
|
||||
#include "crypto/afsplit.h"
|
||||
|
|
@ -46,37 +47,6 @@
|
|||
*/
|
||||
|
||||
typedef struct QCryptoBlockLUKS QCryptoBlockLUKS;
|
||||
typedef struct QCryptoBlockLUKSHeader QCryptoBlockLUKSHeader;
|
||||
typedef struct QCryptoBlockLUKSKeySlot QCryptoBlockLUKSKeySlot;
|
||||
|
||||
|
||||
/* The following constants are all defined by the LUKS spec */
|
||||
#define QCRYPTO_BLOCK_LUKS_VERSION 1
|
||||
|
||||
#define QCRYPTO_BLOCK_LUKS_MAGIC_LEN 6
|
||||
#define QCRYPTO_BLOCK_LUKS_CIPHER_NAME_LEN 32
|
||||
#define QCRYPTO_BLOCK_LUKS_CIPHER_MODE_LEN 32
|
||||
#define QCRYPTO_BLOCK_LUKS_HASH_SPEC_LEN 32
|
||||
#define QCRYPTO_BLOCK_LUKS_DIGEST_LEN 20
|
||||
#define QCRYPTO_BLOCK_LUKS_SALT_LEN 32
|
||||
#define QCRYPTO_BLOCK_LUKS_UUID_LEN 40
|
||||
#define QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS 8
|
||||
#define QCRYPTO_BLOCK_LUKS_STRIPES 4000
|
||||
#define QCRYPTO_BLOCK_LUKS_MIN_SLOT_KEY_ITERS 1000
|
||||
#define QCRYPTO_BLOCK_LUKS_MIN_MASTER_KEY_ITERS 1000
|
||||
#define QCRYPTO_BLOCK_LUKS_KEY_SLOT_OFFSET 4096
|
||||
|
||||
#define QCRYPTO_BLOCK_LUKS_KEY_SLOT_DISABLED 0x0000DEAD
|
||||
#define QCRYPTO_BLOCK_LUKS_KEY_SLOT_ENABLED 0x00AC71F3
|
||||
|
||||
#define QCRYPTO_BLOCK_LUKS_SECTOR_SIZE 512LL
|
||||
|
||||
#define QCRYPTO_BLOCK_LUKS_DEFAULT_ITER_TIME_MS 2000
|
||||
#define QCRYPTO_BLOCK_LUKS_ERASE_ITERATIONS 40
|
||||
|
||||
static const char qcrypto_block_luks_magic[QCRYPTO_BLOCK_LUKS_MAGIC_LEN] = {
|
||||
'L', 'U', 'K', 'S', 0xBA, 0xBE
|
||||
};
|
||||
|
||||
typedef struct QCryptoBlockLUKSNameMap QCryptoBlockLUKSNameMap;
|
||||
struct QCryptoBlockLUKSNameMap {
|
||||
|
|
@ -134,69 +104,7 @@ qcrypto_block_luks_cipher_name_map[] = {
|
|||
{ "twofish", qcrypto_block_luks_cipher_size_map_twofish },
|
||||
};
|
||||
|
||||
|
||||
/*
|
||||
* This struct is written to disk in big-endian format,
|
||||
* but operated upon in native-endian format.
|
||||
*/
|
||||
struct QCryptoBlockLUKSKeySlot {
|
||||
/* state of keyslot, enabled/disable */
|
||||
uint32_t active;
|
||||
/* iterations for PBKDF2 */
|
||||
uint32_t iterations;
|
||||
/* salt for PBKDF2 */
|
||||
uint8_t salt[QCRYPTO_BLOCK_LUKS_SALT_LEN];
|
||||
/* start sector of key material */
|
||||
uint32_t key_offset_sector;
|
||||
/* number of anti-forensic stripes */
|
||||
uint32_t stripes;
|
||||
};
|
||||
|
||||
QEMU_BUILD_BUG_ON(sizeof(struct QCryptoBlockLUKSKeySlot) != 48);
|
||||
|
||||
|
||||
/*
|
||||
* This struct is written to disk in big-endian format,
|
||||
* but operated upon in native-endian format.
|
||||
*/
|
||||
struct QCryptoBlockLUKSHeader {
|
||||
/* 'L', 'U', 'K', 'S', '0xBA', '0xBE' */
|
||||
char magic[QCRYPTO_BLOCK_LUKS_MAGIC_LEN];
|
||||
|
||||
/* LUKS version, currently 1 */
|
||||
uint16_t version;
|
||||
|
||||
/* cipher name specification (aes, etc) */
|
||||
char cipher_name[QCRYPTO_BLOCK_LUKS_CIPHER_NAME_LEN];
|
||||
|
||||
/* cipher mode specification (cbc-plain, xts-essiv:sha256, etc) */
|
||||
char cipher_mode[QCRYPTO_BLOCK_LUKS_CIPHER_MODE_LEN];
|
||||
|
||||
/* hash specification (sha256, etc) */
|
||||
char hash_spec[QCRYPTO_BLOCK_LUKS_HASH_SPEC_LEN];
|
||||
|
||||
/* start offset of the volume data (in 512 byte sectors) */
|
||||
uint32_t payload_offset_sector;
|
||||
|
||||
/* Number of key bytes */
|
||||
uint32_t master_key_len;
|
||||
|
||||
/* master key checksum after PBKDF2 */
|
||||
uint8_t master_key_digest[QCRYPTO_BLOCK_LUKS_DIGEST_LEN];
|
||||
|
||||
/* salt for master key PBKDF2 */
|
||||
uint8_t master_key_salt[QCRYPTO_BLOCK_LUKS_SALT_LEN];
|
||||
|
||||
/* iterations for master key PBKDF2 */
|
||||
uint32_t master_key_iterations;
|
||||
|
||||
/* UUID of the partition in standard ASCII representation */
|
||||
uint8_t uuid[QCRYPTO_BLOCK_LUKS_UUID_LEN];
|
||||
|
||||
/* key slots */
|
||||
QCryptoBlockLUKSKeySlot key_slots[QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS];
|
||||
};
|
||||
|
||||
QEMU_BUILD_BUG_ON(sizeof(struct QCryptoBlockLUKSHeader) != 592);
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue