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c972fa123c
The two thing that should be handled are cipher and ivgen. For ivgen the solution is just mutex, as iv calculations should not be long in comparison with encryption/decryption. And for cipher let's just keep per-thread ciphers. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
128 lines
4.3 KiB
C
128 lines
4.3 KiB
C
/*
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* QEMU Crypto block device encryption
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*
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* Copyright (c) 2015-2016 Red Hat, Inc.
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*
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* This library 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 of the License, or (at your option) any later version.
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*
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* This library 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 library; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef QCRYPTO_BLOCKPRIV_H
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#define QCRYPTO_BLOCKPRIV_H
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#include "crypto/block.h"
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#include "qemu/thread.h"
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typedef struct QCryptoBlockDriver QCryptoBlockDriver;
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struct QCryptoBlock {
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QCryptoBlockFormat format;
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const QCryptoBlockDriver *driver;
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void *opaque;
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QCryptoCipher **ciphers;
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size_t n_ciphers;
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size_t n_free_ciphers;
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QCryptoIVGen *ivgen;
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QemuMutex mutex;
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QCryptoHashAlgorithm kdfhash;
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size_t niv;
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uint64_t payload_offset; /* In bytes */
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uint64_t sector_size; /* In bytes */
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};
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struct QCryptoBlockDriver {
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int (*open)(QCryptoBlock *block,
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QCryptoBlockOpenOptions *options,
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const char *optprefix,
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QCryptoBlockReadFunc readfunc,
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void *opaque,
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unsigned int flags,
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size_t n_threads,
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Error **errp);
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int (*create)(QCryptoBlock *block,
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QCryptoBlockCreateOptions *options,
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const char *optprefix,
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QCryptoBlockInitFunc initfunc,
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QCryptoBlockWriteFunc writefunc,
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void *opaque,
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Error **errp);
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int (*get_info)(QCryptoBlock *block,
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QCryptoBlockInfo *info,
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Error **errp);
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void (*cleanup)(QCryptoBlock *block);
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int (*encrypt)(QCryptoBlock *block,
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uint64_t startsector,
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uint8_t *buf,
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size_t len,
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Error **errp);
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int (*decrypt)(QCryptoBlock *block,
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uint64_t startsector,
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uint8_t *buf,
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size_t len,
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Error **errp);
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bool (*has_format)(const uint8_t *buf,
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size_t buflen);
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};
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int qcrypto_block_cipher_decrypt_helper(QCryptoCipher *cipher,
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size_t niv,
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QCryptoIVGen *ivgen,
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int sectorsize,
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uint64_t offset,
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uint8_t *buf,
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size_t len,
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Error **errp);
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int qcrypto_block_cipher_encrypt_helper(QCryptoCipher *cipher,
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size_t niv,
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QCryptoIVGen *ivgen,
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int sectorsize,
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uint64_t offset,
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uint8_t *buf,
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size_t len,
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Error **errp);
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int qcrypto_block_decrypt_helper(QCryptoBlock *block,
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int sectorsize,
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uint64_t offset,
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uint8_t *buf,
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size_t len,
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Error **errp);
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int qcrypto_block_encrypt_helper(QCryptoBlock *block,
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int sectorsize,
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uint64_t offset,
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uint8_t *buf,
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size_t len,
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Error **errp);
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int qcrypto_block_init_cipher(QCryptoBlock *block,
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QCryptoCipherAlgorithm alg,
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QCryptoCipherMode mode,
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const uint8_t *key, size_t nkey,
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size_t n_threads, Error **errp);
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void qcrypto_block_free_cipher(QCryptoBlock *block);
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#endif /* QCRYPTO_BLOCKPRIV_H */
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