73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
|
/*
|
||
|
|
* AsyncFileEncrypted.h
|
||
|
|
*
|
||
|
|
* This source file is part of the FoundationDB open source project
|
||
|
|
*
|
||
|
|
* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __FDBRPC_ASYNC_FILE_ENCRYPTED_H__
|
||
|
|
#define __FDBRPC_ASYNC_FILE_ENCRYPTED_H__
|
||
|
|
|
||
|
|
#include "fdbrpc/IAsyncFile.h"
|
||
|
|
#include "flow/FastRef.h"
|
||
|
|
#include "flow/flow.h"
|
||
|
|
#include "flow/IRandom.h"
|
||
|
|
#include "flow/StreamCipher.h"
|
||
|
|
|
||
|
|
#include <array>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Append-only file encrypted using AES-128-GCM.
|
||
|
|
* */
|
||
|
|
class AsyncFileEncrypted : public IAsyncFile, public ReferenceCounted<AsyncFileEncrypted> {
|
||
|
|
Reference<IAsyncFile> file;
|
||
|
|
StreamCipher::IV firstBlockIV;
|
||
|
|
StreamCipher::IV getIV(uint16_t block) const;
|
||
|
|
bool canWrite;
|
||
|
|
Future<Void> writeLastBlockToFile();
|
||
|
|
friend class AsyncFileEncryptedImpl;
|
||
|
|
static Optional<StreamCipher::Key> key;
|
||
|
|
static StreamCipher::Key getKey();
|
||
|
|
|
||
|
|
// Reading:
|
||
|
|
std::map<uint16_t, Standalone<StringRef>> readBuffers;
|
||
|
|
|
||
|
|
// Writing (append only):
|
||
|
|
std::unique_ptr<EncryptionStreamCipher> encryptor;
|
||
|
|
uint16_t currentBlock{ 0 };
|
||
|
|
int offsetInBlock{ 0 };
|
||
|
|
std::vector<unsigned char> writeBuffer;
|
||
|
|
|
||
|
|
public:
|
||
|
|
AsyncFileEncrypted(Reference<IAsyncFile>, bool canWrite);
|
||
|
|
void addref() override;
|
||
|
|
void delref() override;
|
||
|
|
Future<int> read(void* data, int length, int64_t offset) override;
|
||
|
|
Future<Void> write(void const* data, int length, int64_t offset) override;
|
||
|
|
Future<Void> zeroRange(int64_t offset, int64_t length) override;
|
||
|
|
Future<Void> truncate(int64_t size) override;
|
||
|
|
Future<Void> sync() override;
|
||
|
|
Future<Void> flush() override;
|
||
|
|
Future<int64_t> size() const override;
|
||
|
|
std::string getFilename() const override;
|
||
|
|
Future<Void> readZeroCopy(void** data, int* length, int64_t offset) override;
|
||
|
|
void releaseZeroCopy(void* data, int length, int64_t offset) override;
|
||
|
|
int64_t debugFD() const override;
|
||
|
|
static Future<Void> initializeKey(const Reference<IAsyncFile>& keyFile, int64_t offset = 0);
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|