remoting/protocol/negotiating_authenticator.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef REMOTING_PROTOCOL_NEGOTIATING_AUTHENTICATOR_H_
   6 #define REMOTING_PROTOCOL_NEGOTIATING_AUTHENTICATOR_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/basictypes.h"
  12 #include "base/memory/ref_counted.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "remoting/protocol/authenticator.h"
  15 #include "remoting/protocol/authentication_method.h"
  16
  17 namespace remoting {
  18
  19 class RsaKeyPair;
  20
  21 namespace protocol {
  22
  23 class NegotiatingAuthenticator : public Authenticator {
  24  public:
  25   virtual ~NegotiatingAuthenticator();
  26
  27   static bool IsNegotiableMessage(const buzz::XmlElement* message);
  28
  29   // Creates a client authenticator for the given methods.
  30   static scoped_ptr<Authenticator> CreateForClient(
  31       const std::string& authentication_tag,
  32       const std::string& shared_secret,
  33       const std::vector<AuthenticationMethod>& methods);
  34
  35   // Creates a host authenticator, using a fixed shared secret/PIN hash.
  36   static scoped_ptr<Authenticator> CreateForHost(
  37       const std::string& local_cert,
  38       scoped_refptr<RsaKeyPair> key_pair,
  39       const std::string& shared_secret_hash,
  40       AuthenticationMethod::HashFunction hash_function);
  41
  42   // Authenticator interface.
  43   virtual State state() const OVERRIDE;
  44   virtual RejectionReason rejection_reason() const OVERRIDE;
  45   virtual void ProcessMessage(const buzz::XmlElement* message,
  46                               const base::Closure& resume_callback) OVERRIDE;
  47   virtual scoped_ptr<buzz::XmlElement> GetNextMessage() OVERRIDE;
  48   virtual scoped_ptr<ChannelAuthenticator>
  49       CreateChannelAuthenticator() const OVERRIDE;
  50
  51  private:
  52   NegotiatingAuthenticator(Authenticator::State initial_state);
  53
  54   void AddMethod(const AuthenticationMethod& method);
  55   void CreateAuthenticator(State initial_state);
  56   void UpdateState(const base::Closure& resume_callback);
  57
  58   bool is_host_side() const;
  59
  60   // Used only for host authenticators.
  61   std::string local_cert_;
  62   scoped_refptr<RsaKeyPair> local_key_pair_;
  63   std::string shared_secret_hash_;
  64
  65   // Used only for client authenticators.
  66   std::string authentication_tag_;
  67   std::string shared_secret_;
  68
  69   // Used for both host and client authenticators.
  70   std::vector<AuthenticationMethod> methods_;
  71   AuthenticationMethod current_method_;
  72   scoped_ptr<Authenticator> current_authenticator_;
  73   State state_;
  74   RejectionReason rejection_reason_;
  75
  76   DISALLOW_COPY_AND_ASSIGN(NegotiatingAuthenticator);
  77 };
  78
  79 }  // namespace protocol
  80 }  // namespace remoting
  81
  82 #endif  // REMOTING_PROTOCOL_NEGOTIATING_AUTHENTICATOR_H_