projects / mirror_qemu.git / blame
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|---|---|---|
| 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 | ||
| 21 | #ifndef QCRYPTO_BLOCK_PRIV_H__ | |
| 22 | #define QCRYPTO_BLOCK_PRIV_H__ | |
| 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, | |
| 44 | QCryptoBlockReadFunc readfunc, | |
| 45 | void *opaque, | |
| 46 | unsigned int flags, | |
| 47 | Error **errp); | |
| 48 | ||
| 49 | int (*create)(QCryptoBlock *block, | |
| 50 | QCryptoBlockCreateOptions *options, | |
| 51 | QCryptoBlockInitFunc initfunc, | |
| 52 | QCryptoBlockWriteFunc writefunc, | |
| 53 | void *opaque, | |
| 54 | Error **errp); | |
| 55 | ||
| 56 | void (*cleanup)(QCryptoBlock *block); | |
| 57 | ||
| 58 | int (*encrypt)(QCryptoBlock *block, | |
| 59 | uint64_t startsector, | |
| 60 | uint8_t *buf, | |
| 61 | size_t len, | |
| 62 | Error **errp); | |
| 63 | int (*decrypt)(QCryptoBlock *block, | |
| 64 | uint64_t startsector, | |
| 65 | uint8_t *buf, | |
| 66 | size_t len, | |
| 67 | Error **errp); | |
| 68 | ||
| 69 | bool (*has_format)(const uint8_t *buf, | |
| 70 | size_t buflen); | |
| 71 | }; | |
| 72 | ||
| 73 | ||
| 74 | int qcrypto_block_decrypt_helper(QCryptoCipher *cipher, | |
| 75 | size_t niv, | |
| 76 | QCryptoIVGen *ivgen, | |
| 77 | int sectorsize, | |
| 78 | uint64_t startsector, | |
| 79 | uint8_t *buf, | |
| 80 | size_t len, | |
| 81 | Error **errp); | |
| 82 | ||
| 83 | int qcrypto_block_encrypt_helper(QCryptoCipher *cipher, | |
| 84 | size_t niv, | |
| 85 | QCryptoIVGen *ivgen, | |
| 86 | int sectorsize, | |
| 87 | uint64_t startsector, | |
| 88 | uint8_t *buf, | |
| 89 | size_t len, | |
| 90 | Error **errp); | |
| 91 | ||
| 92 | #endif /* QCRYPTO_BLOCK_PRIV_H__ */ |