[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"

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 */
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 */
	39	};
	40
	41	struct QCryptoBlockDriver {
	42	int (open)(QCryptoBlock block,
	43	QCryptoBlockOpenOptions *options,
1cd9a787	44	const char *optprefix,
7d969014 DB	45	QCryptoBlockReadFunc readfunc,
	46	void *opaque,
	47	unsigned int flags,
	48	Error **errp);
	49
	50	int (create)(QCryptoBlock block,
	51	QCryptoBlockCreateOptions *options,
1cd9a787	52	const char *optprefix,
7d969014 DB	53	QCryptoBlockInitFunc initfunc,
	54	QCryptoBlockWriteFunc writefunc,
	55	void *opaque,
	56	Error **errp);
	57
40c85028 DB	58	int (get_info)(QCryptoBlock block,
	59	QCryptoBlockInfo *info,
	60	Error **errp);
	61
7d969014 DB	62	void (cleanup)(QCryptoBlock block);
	63
	64	int (encrypt)(QCryptoBlock block,
	65	uint64_t startsector,
	66	uint8_t *buf,
	67	size_t len,
	68	Error **errp);
	69	int (decrypt)(QCryptoBlock block,
	70	uint64_t startsector,
	71	uint8_t *buf,
	72	size_t len,
	73	Error **errp);
	74
	75	bool (has_format)(const uint8_t buf,
	76	size_t buflen);
	77	};
	78
	79
	80	int qcrypto_block_decrypt_helper(QCryptoCipher *cipher,
	81	size_t niv,
	82	QCryptoIVGen *ivgen,
	83	int sectorsize,
	84	uint64_t startsector,
	85	uint8_t *buf,
	86	size_t len,
	87	Error **errp);
	88
	89	int qcrypto_block_encrypt_helper(QCryptoCipher *cipher,
	90	size_t niv,
	91	QCryptoIVGen *ivgen,
	92	int sectorsize,
	93	uint64_t startsector,
	94	uint8_t *buf,
	95	size_t len,
	96	Error **errp);
	97
121d0712	98	#endif /* QCRYPTO_BLOCKPRIV_H */