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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 | |
b7cbb874 | 9 | * version 2.1 of the License, or (at your option) any later version. |
7d969014 DB |
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 |
22 | #define QCRYPTO_BLOCKPRIV_H | |
7d969014 DB |
23 | |
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; |
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 */ |