417a701636
- Fixed numBlocks() in OnDiskBlockStore, FakeBlockStore, CachingBlockStore, ... - CachingBlockStore caches created blocks and doesn't directly create them in the underlying blockstore
62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
#pragma once
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#ifndef BLOCKSTORE_IMPLEMENTATIONS_ENCRYPTED_ENCRYPTEDBLOCK_H_
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#define BLOCKSTORE_IMPLEMENTATIONS_ENCRYPTED_ENCRYPTEDBLOCK_H_
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#include "../../interface/Block.h"
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#include "EncryptionKey.h"
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#include "../../utils/Data.h"
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#include "../../interface/BlockStore.h"
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#include "messmer/cpp-utils/macros.h"
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#include <memory>
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namespace blockstore {
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namespace encrypted {
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class EncryptedBlockStore;
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class EncryptedBlock: public Block {
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public:
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//TODO Storing key twice (in parent class and in object pointed to). Once would be enough.
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EncryptedBlock(std::unique_ptr<Block> baseBlock, const EncryptionKey &encKey);
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virtual ~EncryptedBlock();
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static std::unique_ptr<EncryptedBlock> TryCreateNew(BlockStore *baseBlockStore, const Key &key, Data data, const EncryptionKey &encKey);
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const void *data() const override;
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void write(const void *source, uint64_t offset, uint64_t size) override;
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void flush() override;
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size_t size() const override;
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static constexpr unsigned int BASE_BLOCK_SIZE(unsigned int useableBlockSize) {
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return useableBlockSize + IV_SIZE;
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}
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static constexpr unsigned int USEABLE_BLOCK_SIZE(unsigned int baseBlockSize) {
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return baseBlockSize - IV_SIZE;
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}
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private:
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std::unique_ptr<Block> _baseBlock;
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Data _plaintextData;
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EncryptionKey _encKey;
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bool _dataChanged;
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static constexpr unsigned int IV_SIZE = CryptoPP::AES::BLOCKSIZE;
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byte *baseBlockIV();
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byte *baseBlockData();
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void _encryptToBaseBlock();
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void _decryptFromBaseBlock();
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static Data _encrypt(const Data &plaintext, const EncryptionKey &encKey);
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DISALLOW_COPY_AND_ASSIGN(EncryptedBlock);
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};
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}
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}
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#endif
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