LXR qemu/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
  26typedef struct QCryptoBlockDriver QCryptoBlockDriver;
  27
  28struct 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
  41struct 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
  78int 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
  87int 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 */
  97