73 lines
1.6 KiB
C++
73 lines
1.6 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#pragma once
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#include "storage/storage_file_lock.h"
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#include "storage/storage_encryption.h"
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#include "base/bytes.h"
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#include "base/optional.h"
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namespace Storage {
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class File {
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public:
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enum class Mode {
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Read,
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ReadAppend,
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Write,
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};
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enum class Result {
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Failed,
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LockFailed,
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WrongKey,
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Success,
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};
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Result open(const QString &path, Mode mode, const EncryptionKey &key);
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size_type read(bytes::span bytes);
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bool write(bytes::span bytes);
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size_type readWithPadding(bytes::span bytes);
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bool writeWithPadding(bytes::span bytes);
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bool flush();
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bool isOpen() const;
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int64 size() const;
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int64 offset() const;
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bool seek(int64 offset);
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void close();
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static bool Move(const QString &from, const QString &to);
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private:
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Result attemptOpen(Mode mode, const EncryptionKey &key);
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Result attemptOpenForRead(const EncryptionKey &key);
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Result attemptOpenForReadAppend(const EncryptionKey &key);
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Result attemptOpenForWrite(const EncryptionKey &key);
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bool writeHeader(const EncryptionKey &key);
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Result readHeader(const EncryptionKey &key);
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size_type readPlain(bytes::span bytes);
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size_type writePlain(bytes::const_span bytes);
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void decrypt(bytes::span bytes);
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void encrypt(bytes::span bytes);
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void decryptBack(bytes::span bytes);
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QFile _data;
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FileLock _lock;
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int64 _encryptionOffset = 0;
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int64 _dataSize = 0;
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std::optional<CtrState> _state;
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};
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} // namespace Storage
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