[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"

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 */
    uint64_t sector_size; /* 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 offset,
                                 uint8_t *buf,
                                 size_t len,
                                 Error **errp);

int qcrypto_block_encrypt_helper(QCryptoCipher *cipher,
                                 size_t niv,
                                 QCryptoIVGen *ivgen,
                                 int sectorsize,
                                 uint64_t offset,
                                 uint8_t *buf,
                                 size_t len,
                                 Error **errp);

#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
	24	#include "crypto/block.h"
	25
	26	typedef struct QCryptoBlockDriver QCryptoBlockDriver;
	27
	28	struct QCryptoBlock {
	29	QCryptoBlockFormat format;
	30
	31	const QCryptoBlockDriver *driver;
	32	void *opaque;
	33
	34	QCryptoCipher *cipher;
	35	QCryptoIVGen *ivgen;
	36	QCryptoHashAlgorithm kdfhash;
	37	size_t niv;
	38	uint64_t payload_offset; /* In bytes */
850f49de	39	uint64_t sector_size; /* In bytes */
7d969014 DB	40	};
	41
	42	struct QCryptoBlockDriver {
	43	int (open)(QCryptoBlock block,
	44	QCryptoBlockOpenOptions *options,
1cd9a787	45	const char *optprefix,
7d969014 DB	46	QCryptoBlockReadFunc readfunc,
	47	void *opaque,
	48	unsigned int flags,
	49	Error **errp);
	50
	51	int (create)(QCryptoBlock block,
	52	QCryptoBlockCreateOptions *options,
1cd9a787	53	const char *optprefix,
7d969014 DB	54	QCryptoBlockInitFunc initfunc,
	55	QCryptoBlockWriteFunc writefunc,
	56	void *opaque,
	57	Error **errp);
	58
40c85028 DB	59	int (get_info)(QCryptoBlock block,
	60	QCryptoBlockInfo *info,
	61	Error **errp);
	62
7d969014 DB	63	void (cleanup)(QCryptoBlock block);
	64
	65	int (encrypt)(QCryptoBlock block,
	66	uint64_t startsector,
	67	uint8_t *buf,
	68	size_t len,
	69	Error **errp);
	70	int (decrypt)(QCryptoBlock block,
	71	uint64_t startsector,
	72	uint8_t *buf,
	73	size_t len,
	74	Error **errp);
	75
	76	bool (has_format)(const uint8_t buf,
	77	size_t buflen);
	78	};
	79
	80
	81	int qcrypto_block_decrypt_helper(QCryptoCipher *cipher,
	82	size_t niv,
	83	QCryptoIVGen *ivgen,
	84	int sectorsize,
4609742a	85	uint64_t offset,
7d969014 DB	86	uint8_t *buf,
	87	size_t len,
	88	Error **errp);
	89
	90	int qcrypto_block_encrypt_helper(QCryptoCipher *cipher,
	91	size_t niv,
	92	QCryptoIVGen *ivgen,
	93	int sectorsize,
4609742a	94	uint64_t offset,
7d969014 DB	95	uint8_t *buf,
	96	size_t len,
	97	Error **errp);
	98
121d0712	99	#endif /* QCRYPTO_BLOCKPRIV_H */