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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_PROXIMITY_AUTH_DEVICE_TO_DEVICE_SECURE_CONTEXT_H
#define COMPONENTS_PROXIMITY_AUTH_DEVICE_TO_DEVICE_SECURE_CONTEXT_H
#include <memory>
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "components/proximity_auth/secure_context.h"
namespace securemessage {
class Header;
}
namespace cryptauth {
class SecureMessageDelegate;
}
namespace proximity_auth {
// SecureContext implementation for the DeviceToDevice protocol.
class DeviceToDeviceSecureContext : public SecureContext {
public:
DeviceToDeviceSecureContext(
std::unique_ptr<cryptauth::SecureMessageDelegate> secure_message_delegate,
const std::string& symmetric_key,
const std::string& responder_auth_message_,
ProtocolVersion protocol_version);
~DeviceToDeviceSecureContext() override;
// SecureContext:
void Decode(const std::string& encoded_message,
const MessageCallback& callback) override;
void Encode(const std::string& message,
const MessageCallback& callback) override;
ProtocolVersion GetProtocolVersion() const override;
std::string GetChannelBindingData() const override;
private:
// Callback for unwrapping a secure message. |callback| will be invoked with
// the decrypted payload if the message is unwrapped successfully; otherwise
// it will be invoked with an empty string.
void HandleUnwrapResult(
const DeviceToDeviceSecureContext::MessageCallback& callback,
bool verified,
const std::string& payload,
const securemessage::Header& header);
// Delegate for handling the creation and unwrapping of SecureMessages.
std::unique_ptr<cryptauth::SecureMessageDelegate> secure_message_delegate_;
// The symmetric key used to create and unwrap messages.
const std::string symmetric_key_;
// The [Responder Auth] message received from the remote device during
// authentication.
const std::string responder_auth_message_;
// The protocol version supported by the remote device.
const ProtocolVersion protocol_version_;
// The last sequence number of the message sent or received.
int last_sequence_number_;
base::WeakPtrFactory<DeviceToDeviceSecureContext> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(DeviceToDeviceSecureContext);
};
} // namespace proximity_auth
#endif // COMPONENTS_PROXIMITY_AUTH_DEVICE_TO_DEVICE_SECURE_CONTEXT_H
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