[mirror_qemu.git] / crypto / blockpriv.h

/*
 * 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"
#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 (*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 */
Commit	Line	Data
7d969014 DB	1	/*
	2	* QEMU Crypto block device encryption
	3	*
	4	* Copyright (c) 2015-2016 Red Hat, Inc.
	5	*
	6	* This library is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2 of the License, or (at your option) any later version.
	10	*
	11	* This library is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* Lesser General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public
	17	* License along with this library; if not, see <http://www.gnu.org/licenses/>.
	18	*
	19	*/
	20
121d0712 MA	21	#ifndef QCRYPTO_BLOCKPRIV_H
121d0712 MA	22	#define QCRYPTO_BLOCKPRIV_H
7d969014 DB	23
7d969014 DB	24	#include "crypto/block.h"
c972fa12	25	#include "qemu/thread.h"
7d969014 DB	26
	27	typedef struct QCryptoBlockDriver QCryptoBlockDriver;
	28
	29	struct QCryptoBlock {
	30	QCryptoBlockFormat format;
	31
	32	const QCryptoBlockDriver *driver;
	33	void *opaque;
	34
c972fa12 VSO	35	QCryptoCipher **ciphers;
	36	size_t n_ciphers;
	37	size_t n_free_ciphers;
7d969014	38	QCryptoIVGen *ivgen;
c972fa12 VSO	39	QemuMutex mutex;
c972fa12 VSO	40
7d969014 DB	41	QCryptoHashAlgorithm kdfhash;
	42	size_t niv;
	43	uint64_t payload_offset; /* In bytes */
850f49de	44	uint64_t sector_size; /* In bytes */
7d969014 DB	45	};
	46
	47	struct QCryptoBlockDriver {
	48	int (open)(QCryptoBlock block,
	49	QCryptoBlockOpenOptions *options,
1cd9a787	50	const char *optprefix,
7d969014 DB	51	QCryptoBlockReadFunc readfunc,
	52	void *opaque,
	53	unsigned int flags,
c972fa12	54	size_t n_threads,
7d969014 DB	55	Error **errp);
	56
	57	int (create)(QCryptoBlock block,
	58	QCryptoBlockCreateOptions *options,
1cd9a787	59	const char *optprefix,
7d969014 DB	60	QCryptoBlockInitFunc initfunc,
	61	QCryptoBlockWriteFunc writefunc,
	62	void *opaque,
	63	Error **errp);
	64
40c85028 DB	65	int (get_info)(QCryptoBlock block,
	66	QCryptoBlockInfo *info,
	67	Error **errp);
	68
7d969014 DB	69	void (cleanup)(QCryptoBlock block);
	70
	71	int (encrypt)(QCryptoBlock block,
	72	uint64_t startsector,
	73	uint8_t *buf,
	74	size_t len,
	75	Error **errp);
	76	int (decrypt)(QCryptoBlock block,
	77	uint64_t startsector,
	78	uint8_t *buf,
	79	size_t len,
	80	Error **errp);
	81
	82	bool (has_format)(const uint8_t buf,
	83	size_t buflen);
	84	};
	85
	86
0270417c VSO	87	int qcrypto_block_cipher_decrypt_helper(QCryptoCipher *cipher,
	88	size_t niv,
	89	QCryptoIVGen *ivgen,
	90	int sectorsize,
	91	uint64_t offset,
	92	uint8_t *buf,
	93	size_t len,
	94	Error **errp);
	95
	96	int qcrypto_block_cipher_encrypt_helper(QCryptoCipher *cipher,
	97	size_t niv,
	98	QCryptoIVGen *ivgen,
	99	int sectorsize,
	100	uint64_t offset,
	101	uint8_t *buf,
	102	size_t len,
	103	Error **errp);
7d969014	104
0f0d596c VSO	105	int qcrypto_block_decrypt_helper(QCryptoBlock *block,
	106	int sectorsize,
	107	uint64_t offset,
	108	uint8_t *buf,
	109	size_t len,
	110	Error **errp);
	111
	112	int qcrypto_block_encrypt_helper(QCryptoBlock *block,
	113	int sectorsize,
	114	uint64_t offset,
	115	uint8_t *buf,
	116	size_t len,
	117	Error **errp);
	118
c972fa12 VSO	119	int qcrypto_block_init_cipher(QCryptoBlock *block,
	120	QCryptoCipherAlgorithm alg,
	121	QCryptoCipherMode mode,
	122	const uint8_t *key, size_t nkey,
	123	size_t n_threads, Error **errp);
	124
	125	void qcrypto_block_free_cipher(QCryptoBlock *block);
	126
121d0712	127	#endif /* QCRYPTO_BLOCKPRIV_H */