1cd9a787a2
While the crypto layer uses a fixed option name "key-secret", the upper block layer may have a prefix on the options. e.g. "encrypt.key-secret", in order to avoid clashes between crypto option names & other block option names. To ensure the crypto layer can report accurate error messages, we must tell it what option name prefix was used. Reviewed-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 20170623162419.26068-19-berrange@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
99 lines
3.1 KiB
C
99 lines
3.1 KiB
C
/*
|
|
* 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 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"
|
|
|
|
typedef struct QCryptoBlockDriver QCryptoBlockDriver;
|
|
|
|
struct QCryptoBlock {
|
|
QCryptoBlockFormat format;
|
|
|
|
const QCryptoBlockDriver *driver;
|
|
void *opaque;
|
|
|
|
QCryptoCipher *cipher;
|
|
QCryptoIVGen *ivgen;
|
|
QCryptoHashAlgorithm kdfhash;
|
|
size_t niv;
|
|
uint64_t payload_offset; /* In bytes */
|
|
};
|
|
|
|
struct QCryptoBlockDriver {
|
|
int (*open)(QCryptoBlock *block,
|
|
QCryptoBlockOpenOptions *options,
|
|
const char *optprefix,
|
|
QCryptoBlockReadFunc readfunc,
|
|
void *opaque,
|
|
unsigned int flags,
|
|
Error **errp);
|
|
|
|
int (*create)(QCryptoBlock *block,
|
|
QCryptoBlockCreateOptions *options,
|
|
const char *optprefix,
|
|
QCryptoBlockInitFunc initfunc,
|
|
QCryptoBlockWriteFunc writefunc,
|
|
void *opaque,
|
|
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_decrypt_helper(QCryptoCipher *cipher,
|
|
size_t niv,
|
|
QCryptoIVGen *ivgen,
|
|
int sectorsize,
|
|
uint64_t startsector,
|
|
uint8_t *buf,
|
|
size_t len,
|
|
Error **errp);
|
|
|
|
int qcrypto_block_encrypt_helper(QCryptoCipher *cipher,
|
|
size_t niv,
|
|
QCryptoIVGen *ivgen,
|
|
int sectorsize,
|
|
uint64_t startsector,
|
|
uint8_t *buf,
|
|
size_t len,
|
|
Error **errp);
|
|
|
|
#endif /* QCRYPTO_BLOCKPRIV_H */
|