remoting/protocol/third_party_client_authenticator.cc

   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 #include "remoting/protocol/third_party_client_authenticator.h"
   6
   7 #include "base/base64.h"
   8 #include "base/bind.h"
   9 #include "base/callback.h"
  10 #include "base/logging.h"
  11 #include "remoting/base/constants.h"
  12 #include "remoting/base/rsa_key_pair.h"
  13 #include "remoting/protocol/channel_authenticator.h"
  14 #include "remoting/protocol/v2_authenticator.h"
  15 #include "third_party/webrtc/libjingle/xmllite/xmlelement.h"
  16 #include "url/gurl.h"
  17
  18 namespace remoting {
  19 namespace protocol {
  20
  21 ThirdPartyClientAuthenticator::ThirdPartyClientAuthenticator(
  22     scoped_ptr<TokenFetcher> token_fetcher)
  23     : ThirdPartyAuthenticatorBase(WAITING_MESSAGE),
  24       token_fetcher_(token_fetcher.Pass()) {
  25 }
  26
  27 ThirdPartyClientAuthenticator::~ThirdPartyClientAuthenticator() {
  28 }
  29
  30 void ThirdPartyClientAuthenticator::ProcessTokenMessage(
  31     const buzz::XmlElement* message,
  32     const base::Closure& resume_callback) {
  33   std::string token_url = message->TextNamed(kTokenUrlTag);
  34   std::string token_scope = message->TextNamed(kTokenScopeTag);
  35
  36   if (token_url.empty() || token_scope.empty()) {
  37     LOG(ERROR) << "Third-party authentication protocol error: "
  38         "missing token verification URL or scope.";
  39     token_state_ = REJECTED;
  40     rejection_reason_ = PROTOCOL_ERROR;
  41     resume_callback.Run();
  42     return;
  43   }
  44
  45   token_state_ = PROCESSING_MESSAGE;
  46
  47   // |token_fetcher_| is owned, so Unretained() is safe here.
  48   token_fetcher_->FetchThirdPartyToken(
  49       GURL(token_url), token_scope, base::Bind(
  50           &ThirdPartyClientAuthenticator::OnThirdPartyTokenFetched,
  51           base::Unretained(this), resume_callback));
  52 }
  53
  54 void ThirdPartyClientAuthenticator::AddTokenElements(
  55     buzz::XmlElement* message) {
  56   DCHECK_EQ(token_state_, MESSAGE_READY);
  57   DCHECK(!token_.empty());
  58
  59   buzz::XmlElement* token_tag = new buzz::XmlElement(kTokenTag);
  60   token_tag->SetBodyText(token_);
  61   message->AddElement(token_tag);
  62   token_state_ = ACCEPTED;
  63 }
  64
  65 void ThirdPartyClientAuthenticator::OnThirdPartyTokenFetched(
  66     const base::Closure& resume_callback,
  67     const std::string& third_party_token,
  68     const std::string& shared_secret) {
  69   token_ = third_party_token;
  70   if (token_.empty() || shared_secret.empty()) {
  71     token_state_ = REJECTED;
  72     rejection_reason_ = INVALID_CREDENTIALS;
  73   } else {
  74     token_state_ = MESSAGE_READY;
  75     underlying_ = V2Authenticator::CreateForClient(
  76         shared_secret, MESSAGE_READY);
  77   }
  78   resume_callback.Run();
  79 }
  80
  81 }  // namespace protocol
  82 }  // namespace remoting