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/*
* QEMU Crypto block device encryption
*
* 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/>.
*
*/
#ifndef QCRYPTO_BLOCKPRIV_H
#define QCRYPTO_BLOCKPRIV_H
#include "crypto/block.h"
#include "qemu/thread.h"
typedef struct QCryptoBlockDriver QCryptoBlockDriver;
struct QCryptoBlock {
QCryptoBlockFormat format;
const QCryptoBlockDriver *driver;
void *opaque;
QCryptoCipher **ciphers;
size_t n_ciphers;
size_t n_free_ciphers;
QCryptoIVGen *ivgen;
QemuMutex mutex;
QCryptoHashAlgorithm kdfhash;
size_t niv;
uint64_t payload_offset; /* In bytes */
uint64_t sector_size; /* In bytes */
};
struct QCryptoBlockDriver {
int (*open)(QCryptoBlock *block,
QCryptoBlockOpenOptions *options,
const char *optprefix,
QCryptoBlockReadFunc readfunc,
void *opaque,
unsigned int flags,
size_t n_threads,
Error **errp);
int (*create)(QCryptoBlock *block,
QCryptoBlockCreateOptions *options,
const char *optprefix,
QCryptoBlockInitFunc initfunc,
QCryptoBlockWriteFunc writefunc,
void *opaque,
Error **errp);
int (*amend)(QCryptoBlock *block,
QCryptoBlockReadFunc readfunc,
QCryptoBlockWriteFunc writefunc,
void *opaque,
QCryptoBlockAmendOptions *options,
bool force,
Error **errp);
int (*get_info)(QCryptoBlock *block,
QCryptoBlockInfo *info,
Error **errp);
void (*cleanup)(QCryptoBlock *block);
int (*encrypt)(QCryptoBlock *block,
uint64_t startsector,
uint8_t *buf,
size_t len,
Error **errp);
int (*decrypt)(QCryptoBlock *block,
uint64_t startsector,
uint8_t *buf,
size_t len,
Error **errp);
bool (*has_format)(const uint8_t *buf,
size_t buflen);
};
int qcrypto_block_cipher_decrypt_helper(QCryptoCipher *cipher,
size_t niv,
QCryptoIVGen *ivgen,
int sectorsize,
uint64_t offset,
uint8_t *buf,
size_t len,
Error **errp);
int qcrypto_block_cipher_encrypt_helper(QCryptoCipher *cipher,
size_t niv,
QCryptoIVGen *ivgen,
int sectorsize,
uint64_t offset,
uint8_t *buf,
size_t len,
Error **errp);
int qcrypto_block_decrypt_helper(QCryptoBlock *block,
int sectorsize,
uint64_t offset,
uint8_t *buf,
size_t len,
Error **errp);
int qcrypto_block_encrypt_helper(QCryptoBlock *block,
int sectorsize,
uint64_t offset,
uint8_t *buf,
size_t len,
Error **errp);
int qcrypto_block_init_cipher(QCryptoBlock *block,
QCryptoCipherAlgorithm alg,
QCryptoCipherMode mode,
const uint8_t *key, size_t nkey,
size_t n_threads, Error **errp);
void qcrypto_block_free_cipher(QCryptoBlock *block);
#endif /* QCRYPTO_BLOCKPRIV_H */
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