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_BLOCK_PRIV_H__
  22#define QCRYPTO_BLOCK_PRIV_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    void (*cleanup)(QCryptoBlock *block);
  57
  58    int (*encrypt)(QCryptoBlock *block,
  59                   uint64_t startsector,
  60                   uint8_t *buf,
  61                   size_t len,
  62                   Error **errp);
  63    int (*decrypt)(QCryptoBlock *block,
  64                   uint64_t startsector,
  65                   uint8_t *buf,
  66                   size_t len,
  67                   Error **errp);
  68
  69    bool (*has_format)(const uint8_t *buf,
  70                       size_t buflen);
  71};
  72
  73
  74int qcrypto_block_decrypt_helper(QCryptoCipher *cipher,
  75                                 size_t niv,
  76                                 QCryptoIVGen *ivgen,
  77                                 int sectorsize,
  78                                 uint64_t startsector,
  79                                 uint8_t *buf,
  80                                 size_t len,
  81                                 Error **errp);
  82
  83int qcrypto_block_encrypt_helper(QCryptoCipher *cipher,
  84                                 size_t niv,
  85                                 QCryptoIVGen *ivgen,
  86                                 int sectorsize,
  87                                 uint64_t startsector,
  88                                 uint8_t *buf,
  89                                 size_t len,
  90                                 Error **errp);
  91
  92#endif /* QCRYPTO_BLOCK_PRIV_H__ */
  93