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| 1 // Copyright 2013 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_PAIRING_CLIENT_AUTHENTICATOR_H_ |
| 6 #define REMOTING_PROTOCOL_PAIRING_CLIENT_AUTHENTICATOR_H_ |
| 7 |
| 8 #include "base/memory/weak_ptr.h" |
| 9 #include "remoting/protocol/authenticator.h" |
| 10 |
| 11 namespace remoting { |
| 12 |
| 13 class RsaKeyPair; |
| 14 |
| 15 namespace protocol { |
| 16 |
| 17 class Authenticator; |
| 18 |
| 19 typedef base::Callback<void(const std::string& secret)> SecretFetchedCallback; |
| 20 typedef base::Callback<void( |
| 21 const SecretFetchedCallback& secret_fetched_callback)> FetchSecretCallback; |
| 22 |
| 23 // PairingClientAuthenticator builds on top of V2Authenticator to add |
| 24 // support for PIN-less authentication via device pairing. If a client |
| 25 // device is already paired, it includes a client id in the initial |
| 26 // authentication message. If the host recognizes the id, it looks up |
| 27 // the corresponding shared secret to authenticate the client. If it |
| 28 // does not recognize the id, it sends an error message to the client, |
| 29 // which will prompt the user for a PIN to use for authentication |
| 30 // instead. In either case, the V2Authenticator is used for |
| 31 // authentication. |
| 32 class PairingClientAuthenticator : public Authenticator { |
| 33 public: |
| 34 PairingClientAuthenticator( |
| 35 const std::string& client_id, |
| 36 const std::string& shared_secret, |
| 37 const FetchSecretCallback& fetch_secret_callback, |
| 38 const std::string& authentication_tag); |
| 39 virtual ~PairingClientAuthenticator() {} |
| 40 |
| 41 // Authenticator interface. |
| 42 virtual State state() const OVERRIDE; |
| 43 virtual RejectionReason rejection_reason() const OVERRIDE; |
| 44 virtual void ProcessMessage(const buzz::XmlElement* message, |
| 45 const base::Closure& resume_callback) OVERRIDE; |
| 46 virtual scoped_ptr<buzz::XmlElement> GetNextMessage() OVERRIDE; |
| 47 virtual scoped_ptr<ChannelAuthenticator> |
| 48 CreateChannelAuthenticator() const OVERRIDE; |
| 49 |
| 50 private: |
| 51 void CreateV2AuthenticatorWithSecret(const base::Closure& resume_callback, |
| 52 const std::string& secret); |
| 53 |
| 54 bool initial_message_sent_; |
| 55 std::string client_id_; |
| 56 const std::string& shared_secret_; |
| 57 FetchSecretCallback fetch_secret_callback_; |
| 58 std::string authentication_tag_; |
| 59 State initial_state_; |
| 60 scoped_ptr<Authenticator> v2_authenticator_; |
| 61 bool pairing_failed_; |
| 62 base::WeakPtrFactory<PairingClientAuthenticator> weak_factory_; |
| 63 |
| 64 DISALLOW_COPY_AND_ASSIGN(PairingClientAuthenticator); |
| 65 }; |
| 66 |
| 67 } // namespace protocol |
| 68 } // namespace remoting |
| 69 |
| 70 #endif // REMOTING_PROTOCOL_PAIRING_AUTHENTICATOR_H_ |
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