Added class to subscribe to GCD notifications over XMPP.

remoting/protocol/me2me_host_authenticator_factory.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "remoting/protocol/me2me_host_authenticator_factory.h"
 
 #include "base/base64.h"
 #include "base/strings/string_util.h"
 #include "remoting/base/rsa_key_pair.h"
 #include "remoting/protocol/channel_authenticator.h"
 #include "remoting/protocol/negotiating_host_authenticator.h"
 #include "remoting/protocol/token_validator.h"
+#include "remoting/signaling/jid_util.h"
 #include "third_party/webrtc/libjingle/xmllite/xmlelement.h"
 
 namespace remoting {
 namespace protocol {
 
 namespace {
 
 // Authenticator that accepts one message and rejects connection after that.
 class RejectingAuthenticator : public Authenticator {
  public:
@@ skipping 85 matching lines @@
     const std::string& remote_jid,
     const buzz::XmlElement* first_message) {
 
   std::string remote_jid_prefix;
 
   if (!use_service_account_) {
     // JID prefixes may not match the host owner email, for example, in cases
     // where the host owner account does not have an email associated with it.
     // In those cases, the only guarantee we have is that JIDs for the same
     // account will have the same prefix.
-    size_t slash_pos = local_jid.find('/');
-    if (slash_pos == std::string::npos) {
+    if (!SplitJidResource(local_jid, &remote_jid_prefix, nullptr)) {
       LOG(DFATAL) << "Invalid local JID:" << local_jid;
       return make_scoped_ptr(new RejectingAuthenticator());
     }
-    remote_jid_prefix = local_jid.substr(0, slash_pos);
   } else {
     // TODO(rmsousa): This only works for cases where the JID prefix matches
     // the host owner email. Figure out a way to verify the JID in other cases.
     remote_jid_prefix = host_owner_;
   }
 
   // Verify that the client's jid is an ASCII string, and then check that the
   // client JID has the expected prefix. Comparison is case insensitive.
   if (!base::IsStringASCII(remote_jid) ||
       !StartsWithASCII(remote_jid, remote_jid_prefix + '/', false)) {
@@ skipping 12 matching lines @@
     return NegotiatingHostAuthenticator::CreateWithSharedSecret(
         local_cert_, key_pair_, shared_secret_hash_.value,
         shared_secret_hash_.hash_function, pairing_registry_);
   }
 
   return make_scoped_ptr(new RejectingAuthenticator());
 }
 
 }  // namespace protocol
 }  // namespace remoting