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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__ */ |