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tdlib-fork/td/telegram/files/FileEncryptionKey.h

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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#pragma once
#include "td/utils/common.h"
#include "td/utils/logging.h"
#include "td/utils/Slice.h"
#include "td/utils/StringBuilder.h"
#include "td/utils/tl_helpers.h"
#include "td/utils/UInt.h"
namespace td {
namespace secure_storage {
class Secret;
class ValueHash;
} // namespace secure_storage
struct FileEncryptionKey {
enum class Type : int32 { None, Secret, Secure };
FileEncryptionKey() = default;
FileEncryptionKey(Slice key, Slice iv);
explicit FileEncryptionKey(const secure_storage::Secret &secret);
bool is_secret() const {
return type_ == Type::Secret;
}
bool is_secure() const {
return type_ == Type::Secure;
}
static FileEncryptionKey create();
static FileEncryptionKey create_secure_key();
const UInt256 &key() const;
Slice key_slice() const;
secure_storage::Secret secret() const;
bool has_value_hash() const;
void set_value_hash(const secure_storage::ValueHash &value_hash);
secure_storage::ValueHash value_hash() const;
UInt256 &mutable_iv();
Slice iv_slice() const;
int32 calc_fingerprint() const;
bool empty() const {
return key_iv_.empty();
}
size_t size() const {
return key_iv_.size();
}
template <class StorerT>
void store(StorerT &storer) const {
td::store(key_iv_, storer);
}
template <class ParserT>
void parse(Type type, ParserT &parser) {
td::parse(key_iv_, parser);
if (key_iv_.empty()) {
type_ = Type::None;
} else {
if (type_ == Type::Secure) {
if (key_iv_.size() != 64) {
LOG(ERROR) << "Have wrong key size " << key_iv_.size();
}
}
type_ = type;
}
}
friend bool operator==(const FileEncryptionKey &lhs, const FileEncryptionKey &rhs) {
return lhs.key_iv_ == rhs.key_iv_;
}
private:
string key_iv_; // TODO wrong alignment is possible
Type type_ = Type::None;
};
inline bool operator!=(const FileEncryptionKey &lhs, const FileEncryptionKey &rhs) {
return !(lhs == rhs);
}
StringBuilder &operator<<(StringBuilder &string_builder, const FileEncryptionKey &key);
} // namespace td