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// Copyright (c) 2012 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_AUTHENTICATOR_H_
#define REMOTING_PROTOCOL_NEGOTIATING_AUTHENTICATOR_H_
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "remoting/protocol/authenticator.h"
#include "remoting/protocol/authentication_method.h"
namespace crypto {
class RSAPrivateKey;
} // namespace crypto
namespace remoting {
namespace protocol {
class NegotiatingAuthenticator : public Authenticator {
public:
virtual ~NegotiatingAuthenticator();
static bool IsNegotiableMessage(const buzz::XmlElement* message);
static scoped_ptr<Authenticator> CreateForClient(
const std::string& authentication_tag,
const std::string& shared_secret,
const std::vector<AuthenticationMethod>& methods);
static scoped_ptr<Authenticator> CreateForHost(
const std::string& local_cert,
const crypto::RSAPrivateKey& local_private_key,
const std::string& shared_secret_hash,
AuthenticationMethod::HashFunction hash_function);
// Authenticator interface.
virtual State state() const OVERRIDE;
virtual RejectionReason rejection_reason() const OVERRIDE;
virtual void ProcessMessage(const buzz::XmlElement* message) OVERRIDE;
virtual scoped_ptr<buzz::XmlElement> GetNextMessage() OVERRIDE;
virtual scoped_ptr<ChannelAuthenticator>
CreateChannelAuthenticator() const OVERRIDE;
private:
NegotiatingAuthenticator(Authenticator::State initial_state);
void AddMethod(const AuthenticationMethod& method);
void CreateAuthenticator(State initial_state);
bool is_host_side() const;
// Used only for host authenticators.
std::string local_cert_;
scoped_ptr<crypto::RSAPrivateKey> local_private_key_;
bool certificate_sent_;
std::string shared_secret_hash_;
// Used only for client authenticators.
std::string remote_cert_;
std::string authentication_tag_;
std::string shared_secret_;
// Used for both host and client authenticators.
std::vector<AuthenticationMethod> methods_;
AuthenticationMethod current_method_;
scoped_ptr<Authenticator> current_authenticator_;
State state_;
RejectionReason rejection_reason_;
DISALLOW_COPY_AND_ASSIGN(NegotiatingAuthenticator);
};
} // namespace protocol
} // namespace remoting
#endif // REMOTING_PROTOCOL_NEGOTIATING_AUTHENTICATOR_H_
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