remoting/protocol/third_party_host_authenticator.h

   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_THIRD_PARTY_HOST_AUTHENTICATOR_H_
   6 #define REMOTING_PROTOCOL_THIRD_PARTY_HOST_AUTHENTICATOR_H_
   7
   8 #include <string>
   9
  10 #include "base/callback.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "remoting/protocol/third_party_authenticator_base.h"
  13
  14 namespace remoting {
  15
  16 class RsaKeyPair;
  17
  18 namespace protocol {
  19
  20 class TokenValidator;
  21
  22 // Implements the host side of the third party authentication mechanism.
  23 // The host authenticator sends the |token_url| and |scope| obtained from the
  24 // |TokenValidator| to the client, and expects a |token| in response.
  25 // Once that token is received, it calls |TokenValidator| asynchronously to
  26 // validate it, and exchange it for a |shared_secret|. Once the |TokenValidator|
  27 // returns, the host uses the |shared_secret| to create an underlying
  28 // |V2Authenticator|, which is used to establish the encrypted connection.
  29 class ThirdPartyHostAuthenticator : public ThirdPartyAuthenticatorBase {
  30  public:
  31   // Creates a third-party host authenticator. |local_cert| and |key_pair| are
  32   // used by the underlying V2Authenticator to create the SSL channels.
  33   // |token_validator| contains the token parameters to be sent to the client
  34   // and is used to obtain the shared secret.
  35   ThirdPartyHostAuthenticator(const std::string& local_cert,
  36                               scoped_refptr<RsaKeyPair> key_pair,
  37                               scoped_ptr<TokenValidator> token_validator);
  38   ~ThirdPartyHostAuthenticator() override;
  39
  40  protected:
  41   // ThirdPartyAuthenticator implementation.
  42   void ProcessTokenMessage(const buzz::XmlElement* message,
  43                            const base::Closure& resume_callback) override;
  44   void AddTokenElements(buzz::XmlElement* message) override;
  45
  46  private:
  47   void OnThirdPartyTokenValidated(const buzz::XmlElement* message,
  48                                   const base::Closure& resume_callback,
  49                                   const std::string& shared_secret);
  50
  51   std::string local_cert_;
  52   scoped_refptr<RsaKeyPair> key_pair_;
  53   scoped_ptr<TokenValidator> token_validator_;
  54
  55   DISALLOW_COPY_AND_ASSIGN(ThirdPartyHostAuthenticator);
  56 };
  57
  58 }  // namespace protocol
  59 }  // namespace remoting
  60
  61 #endif  // REMOTING_PROTOCOL_THIRD_PARTY_HOST_AUTHENTICATOR_H_