204a42ca97
Summary: These methods allow for more thorough testing of the ObjectRegistry and Customizable infrastructure in a simpler manner. With this change, the Customizable tests can now check what factories are registered and attempt to create each of them in a systematic fashion. With this change, I think all of the factories registered with the ObjectRegistry/CreateFromString are now tested via the customizable_test classes. Note that there were a few other minor changes. There was a "posix://*" register with the ObjectRegistry which was missed during the PatternEntry conversion -- these changes found that. The nickname and default names for the FileSystem classes was also inverted. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9358 Reviewed By: pdillinger Differential Revision: D33433542 Pulled By: mrambacher fbshipit-source-id: 9a32da74e6620745b4eeffb2712be70eeeadfa7e
117 lines
4.6 KiB
C++
117 lines
4.6 KiB
C++
// Copyright (c) 2016-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under both the GPLv2 (found in the
|
|
// COPYING file in the root directory) and Apache 2.0 License
|
|
// (found in the LICENSE.Apache file in the root directory).
|
|
|
|
#pragma once
|
|
|
|
#if !defined(ROCKSDB_LITE)
|
|
|
|
#include "rocksdb/env_encryption.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
// CTRCipherStream implements BlockAccessCipherStream using an
|
|
// Counter operations mode.
|
|
// See https://en.wikipedia.org/wiki/Block_cipher_mode_of_operation
|
|
//
|
|
// Note: This is a possible implementation of BlockAccessCipherStream,
|
|
// it is considered suitable for use.
|
|
class CTRCipherStream final : public BlockAccessCipherStream {
|
|
private:
|
|
std::shared_ptr<BlockCipher> cipher_;
|
|
std::string iv_;
|
|
uint64_t initialCounter_;
|
|
|
|
public:
|
|
CTRCipherStream(const std::shared_ptr<BlockCipher>& c, const char* iv,
|
|
uint64_t initialCounter)
|
|
: cipher_(c), iv_(iv, c->BlockSize()), initialCounter_(initialCounter){};
|
|
virtual ~CTRCipherStream(){};
|
|
|
|
// BlockSize returns the size of each block supported by this cipher stream.
|
|
size_t BlockSize() override { return cipher_->BlockSize(); }
|
|
|
|
protected:
|
|
// Allocate scratch space which is passed to EncryptBlock/DecryptBlock.
|
|
void AllocateScratch(std::string&) override;
|
|
|
|
// Encrypt a block of data at the given block index.
|
|
// Length of data is equal to BlockSize();
|
|
Status EncryptBlock(uint64_t blockIndex, char* data, char* scratch) override;
|
|
|
|
// Decrypt a block of data at the given block index.
|
|
// Length of data is equal to BlockSize();
|
|
Status DecryptBlock(uint64_t blockIndex, char* data, char* scratch) override;
|
|
};
|
|
|
|
// This encryption provider uses a CTR cipher stream, with a given block cipher
|
|
// and IV.
|
|
//
|
|
// Note: This is a possible implementation of EncryptionProvider,
|
|
// it is considered suitable for use, provided a safe BlockCipher is used.
|
|
class CTREncryptionProvider : public EncryptionProvider {
|
|
private:
|
|
std::shared_ptr<BlockCipher> cipher_;
|
|
|
|
protected:
|
|
// For optimal performance when using direct IO, the prefix length should be a
|
|
// multiple of the page size. This size is to ensure the first real data byte
|
|
// is placed at largest known alignment point for direct io.
|
|
const static size_t defaultPrefixLength = 4096;
|
|
|
|
public:
|
|
explicit CTREncryptionProvider(
|
|
const std::shared_ptr<BlockCipher>& c = nullptr);
|
|
virtual ~CTREncryptionProvider() {}
|
|
|
|
static const char* kClassName() { return "CTR"; }
|
|
const char* Name() const override { return kClassName(); }
|
|
bool IsInstanceOf(const std::string& name) const override;
|
|
// GetPrefixLength returns the length of the prefix that is added to every
|
|
// file
|
|
// and used for storing encryption options.
|
|
// For optimal performance when using direct IO, the prefix length should be a
|
|
// multiple of the page size.
|
|
size_t GetPrefixLength() const override;
|
|
|
|
// CreateNewPrefix initialized an allocated block of prefix memory
|
|
// for a new file.
|
|
Status CreateNewPrefix(const std::string& fname, char* prefix,
|
|
size_t prefixLength) const override;
|
|
|
|
// CreateCipherStream creates a block access cipher stream for a file given
|
|
// given name and options.
|
|
Status CreateCipherStream(
|
|
const std::string& fname, const EnvOptions& options, Slice& prefix,
|
|
std::unique_ptr<BlockAccessCipherStream>* result) override;
|
|
|
|
Status AddCipher(const std::string& descriptor, const char* /*cipher*/,
|
|
size_t /*len*/, bool /*for_write*/) override;
|
|
protected:
|
|
|
|
// PopulateSecretPrefixPart initializes the data into a new prefix block
|
|
// that will be encrypted. This function will store the data in plain text.
|
|
// It will be encrypted later (before written to disk).
|
|
// Returns the amount of space (starting from the start of the prefix)
|
|
// that has been initialized.
|
|
virtual size_t PopulateSecretPrefixPart(char* prefix, size_t prefixLength,
|
|
size_t blockSize) const;
|
|
|
|
// CreateCipherStreamFromPrefix creates a block access cipher stream for a
|
|
// file given
|
|
// given name and options. The given prefix is already decrypted.
|
|
virtual Status CreateCipherStreamFromPrefix(
|
|
const std::string& fname, const EnvOptions& options,
|
|
uint64_t initialCounter, const Slice& iv, const Slice& prefix,
|
|
std::unique_ptr<BlockAccessCipherStream>* result);
|
|
};
|
|
|
|
Status NewEncryptedFileSystemImpl(
|
|
const std::shared_ptr<FileSystem>& base_fs,
|
|
const std::shared_ptr<EncryptionProvider>& provider,
|
|
std::unique_ptr<FileSystem>* fs);
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|
|
|
|
#endif // !defined(ROCKSDB_LITE)
|