Merge remote-tracking branch 'remotes/kraxel/tags/pull-vga-20170103-1' into staging
[qemu.git] / crypto / blockpriv.h
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_BLOCKPRIV_H
22 #define QCRYPTO_BLOCKPRIV_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 int (*get_info)(QCryptoBlock *block,
57 QCryptoBlockInfo *info,
58 Error **errp);
59
60 void (*cleanup)(QCryptoBlock *block);
61
62 int (*encrypt)(QCryptoBlock *block,
63 uint64_t startsector,
64 uint8_t *buf,
65 size_t len,
66 Error **errp);
67 int (*decrypt)(QCryptoBlock *block,
68 uint64_t startsector,
69 uint8_t *buf,
70 size_t len,
71 Error **errp);
72
73 bool (*has_format)(const uint8_t *buf,
74 size_t buflen);
75 };
76
77
78 int qcrypto_block_decrypt_helper(QCryptoCipher *cipher,
79 size_t niv,
80 QCryptoIVGen *ivgen,
81 int sectorsize,
82 uint64_t startsector,
83 uint8_t *buf,
84 size_t len,
85 Error **errp);
86
87 int qcrypto_block_encrypt_helper(QCryptoCipher *cipher,
88 size_t niv,
89 QCryptoIVGen *ivgen,
90 int sectorsize,
91 uint64_t startsector,
92 uint8_t *buf,
93 size_t len,
94 Error **errp);
95
96 #endif /* QCRYPTO_BLOCKPRIV_H */