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
14namespace remoting {
15
16class RsaKeyPair;
17
18namespace protocol {
19
20class 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.
29class 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  virtual ~ThirdPartyHostAuthenticator();
39
40 protected:
41  // ThirdPartyAuthenticator implementation.
42  virtual void ProcessTokenMessage(
43      const buzz::XmlElement* message,
44      const base::Closure& resume_callback) OVERRIDE;
45  virtual void AddTokenElements(buzz::XmlElement* message) OVERRIDE;
46
47 private:
48  void OnThirdPartyTokenValidated(const buzz::XmlElement* message,
49                                  const base::Closure& resume_callback,
50                                  const std::string& shared_secret);
51
52  std::string local_cert_;
53  scoped_refptr<RsaKeyPair> key_pair_;
54  scoped_ptr<TokenValidator> token_validator_;
55
56  DISALLOW_COPY_AND_ASSIGN(ThirdPartyHostAuthenticator);
57};
58
59}  // namespace protocol
60}  // namespace remoting
61
62#endif  // REMOTING_PROTOCOL_THIRD_PARTY_HOST_AUTHENTICATOR_H_
63