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 2.1 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_BLOCKPRIV_H |
22 | #define QCRYPTO_BLOCKPRIV_H |
23 | |
24 | #include "crypto/block.h" |
25 | #include "qemu/thread.h" |
26 | |
27 | typedef struct QCryptoBlockDriver QCryptoBlockDriver; |
28 | |
29 | struct QCryptoBlock { |
30 | QCryptoBlockFormat format; |
31 | |
32 | const QCryptoBlockDriver *driver; |
33 | void *opaque; |
34 | |
35 | QCryptoCipher **ciphers; |
36 | size_t n_ciphers; |
37 | size_t n_free_ciphers; |
38 | QCryptoIVGen *ivgen; |
39 | QemuMutex mutex; |
40 | |
41 | QCryptoHashAlgorithm kdfhash; |
42 | size_t niv; |
43 | uint64_t payload_offset; /* In bytes */ |
44 | uint64_t sector_size; /* In bytes */ |
45 | }; |
46 | |
47 | struct QCryptoBlockDriver { |
48 | int (*open)(QCryptoBlock *block, |
49 | QCryptoBlockOpenOptions *options, |
50 | const char *optprefix, |
51 | QCryptoBlockReadFunc readfunc, |
52 | void *opaque, |
53 | unsigned int flags, |
54 | size_t n_threads, |
55 | Error **errp); |
56 | |
57 | int (*create)(QCryptoBlock *block, |
58 | QCryptoBlockCreateOptions *options, |
59 | const char *optprefix, |
60 | QCryptoBlockInitFunc initfunc, |
61 | QCryptoBlockWriteFunc writefunc, |
62 | void *opaque, |
63 | Error **errp); |
64 | |
65 | int (*get_info)(QCryptoBlock *block, |
66 | QCryptoBlockInfo *info, |
67 | Error **errp); |
68 | |
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 | |
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); |
104 | |
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 | |
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 | |
127 | #endif /* QCRYPTO_BLOCKPRIV_H */ |
128 | |