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// Copyright 2013 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 REMOTING_PROTOCOL_NEGOTIATING_CLIENT_AUTHENTICATOR_H_
#define REMOTING_PROTOCOL_NEGOTIATING_CLIENT_AUTHENTICATOR_H_
#include <string>
#include <vector>
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "remoting/protocol/authenticator.h"
#include "remoting/protocol/negotiating_authenticator_base.h"
#include "remoting/protocol/third_party_client_authenticator.h"
namespace remoting {
namespace protocol {
// Client-side implementation of NegotiatingAuthenticatorBase.
// See comments in negotiating_authenticator_base.h for a general explanation.
class NegotiatingClientAuthenticator : public NegotiatingAuthenticatorBase {
public:
// TODO(jamiewalch): Pass ClientConfig instead of separate parameters.
NegotiatingClientAuthenticator(
const std::string& client_pairing_id,
const std::string& shared_secret,
const std::string& authentication_tag,
const FetchSecretCallback& fetch_secret_callback,
const FetchThirdPartyTokenCallback& fetch_third_party_token_callback);
~NegotiatingClientAuthenticator() override;
// Overriden from Authenticator.
void ProcessMessage(const buzz::XmlElement* message,
const base::Closure& resume_callback) override;
scoped_ptr<buzz::XmlElement> GetNextMessage() override;
private:
// (Asynchronously) creates an authenticator, and stores it in
// |current_authenticator_|. Authenticators that can be started in either
// state will be created in |preferred_initial_state|.
// |resume_callback| is called after |current_authenticator_| is set.
void CreateAuthenticatorForCurrentMethod(
Authenticator::State preferred_initial_state,
const base::Closure& resume_callback);
// If possible, create a preferred authenticator ready to send an
// initial message optimistically to the host. The host is free to
// ignore the client's preferred authenticator and initial message
// and to instead reply with an alternative method. See the comments
// in negotiating_authenticator_base.h for more details.
//
// Sets |current_authenticator_| and |current_method_| iff the client
// has a preferred authenticator that can optimistically send an initial
// message.
void CreatePreferredAuthenticator();
// Creates a V2Authenticator in state |initial_state| with the given
// |shared_secret|, then runs |resume_callback|.
void CreateV2AuthenticatorWithSecret(
Authenticator::State initial_state,
const base::Closure& resume_callback,
const std::string& shared_secret);
// Used for pairing authenticators
std::string client_pairing_id_;
std::string shared_secret_;
// Used for all authenticators.
std::string authentication_tag_;
// Used for shared secret authenticators.
FetchSecretCallback fetch_secret_callback_;
// Used for third party authenticators.
FetchThirdPartyTokenCallback fetch_third_party_token_callback_;
// Internal NegotiatingClientAuthenticator data.
bool method_set_by_host_ = false;
base::WeakPtrFactory<NegotiatingClientAuthenticator> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(NegotiatingClientAuthenticator);
};
} // namespace protocol
} // namespace remoting
#endif // REMOTING_PROTOCOL_NEGOTIATING_CLIENT_AUTHENTICATOR_H_
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