Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20210330' into...
[qemu/ar7.git] / crypto / blockpriv.h
blob3c7ccea50401a2bda8a1a501eb3c8b30d0b40811
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  */
21 #ifndef QCRYPTO_BLOCKPRIV_H
22 #define QCRYPTO_BLOCKPRIV_H
24 #include "crypto/block.h"
25 #include "qemu/thread.h"
27 typedef struct QCryptoBlockDriver QCryptoBlockDriver;
29 struct QCryptoBlock {
30     QCryptoBlockFormat format;
32     const QCryptoBlockDriver *driver;
33     void *opaque;
35     QCryptoCipher **ciphers;
36     size_t n_ciphers;
37     size_t n_free_ciphers;
38     QCryptoIVGen *ivgen;
39     QemuMutex mutex;
41     QCryptoHashAlgorithm kdfhash;
42     size_t niv;
43     uint64_t payload_offset; /* In bytes */
44     uint64_t sector_size; /* In bytes */
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);
57     int (*create)(QCryptoBlock *block,
58                   QCryptoBlockCreateOptions *options,
59                   const char *optprefix,
60                   QCryptoBlockInitFunc initfunc,
61                   QCryptoBlockWriteFunc writefunc,
62                   void *opaque,
63                   Error **errp);
65     int (*amend)(QCryptoBlock *block,
66                  QCryptoBlockReadFunc readfunc,
67                  QCryptoBlockWriteFunc writefunc,
68                  void *opaque,
69                  QCryptoBlockAmendOptions *options,
70                  bool force,
71                  Error **errp);
73     int (*get_info)(QCryptoBlock *block,
74                     QCryptoBlockInfo *info,
75                     Error **errp);
77     void (*cleanup)(QCryptoBlock *block);
79     int (*encrypt)(QCryptoBlock *block,
80                    uint64_t startsector,
81                    uint8_t *buf,
82                    size_t len,
83                    Error **errp);
84     int (*decrypt)(QCryptoBlock *block,
85                    uint64_t startsector,
86                    uint8_t *buf,
87                    size_t len,
88                    Error **errp);
90     bool (*has_format)(const uint8_t *buf,
91                        size_t buflen);
95 int qcrypto_block_cipher_decrypt_helper(QCryptoCipher *cipher,
96                                         size_t niv,
97                                         QCryptoIVGen *ivgen,
98                                         int sectorsize,
99                                         uint64_t offset,
100                                         uint8_t *buf,
101                                         size_t len,
102                                         Error **errp);
104 int qcrypto_block_cipher_encrypt_helper(QCryptoCipher *cipher,
105                                         size_t niv,
106                                         QCryptoIVGen *ivgen,
107                                         int sectorsize,
108                                         uint64_t offset,
109                                         uint8_t *buf,
110                                         size_t len,
111                                         Error **errp);
113 int qcrypto_block_decrypt_helper(QCryptoBlock *block,
114                                  int sectorsize,
115                                  uint64_t offset,
116                                  uint8_t *buf,
117                                  size_t len,
118                                  Error **errp);
120 int qcrypto_block_encrypt_helper(QCryptoBlock *block,
121                                  int sectorsize,
122                                  uint64_t offset,
123                                  uint8_t *buf,
124                                  size_t len,
125                                  Error **errp);
127 int qcrypto_block_init_cipher(QCryptoBlock *block,
128                               QCryptoCipherAlgorithm alg,
129                               QCryptoCipherMode mode,
130                               const uint8_t *key, size_t nkey,
131                               size_t n_threads, Error **errp);
133 void qcrypto_block_free_cipher(QCryptoBlock *block);
135 #endif /* QCRYPTO_BLOCKPRIV_H */