[Cast Channel] Add support for nonce challenge to Cast channel authentication.

extensions/browser/api/cast_channel/cast_channel_api.cc

 // Copyright 2014 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 "extensions/browser/api/cast_channel/cast_channel_api.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <limits>
 #include <memory>
 #include <string>
 #include <utility>
 
+#include "base/guid.h"
 #include "base/json/json_writer.h"
 #include "base/lazy_instance.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/time/default_clock.h"
 #include "base/values.h"
 #include "content/public/browser/browser_thread.h"
 #include "extensions/browser/api/cast_channel/cast_message_util.h"
 #include "extensions/browser/api/cast_channel/cast_socket.h"
 #include "extensions/browser/api/cast_channel/keep_alive_delegate.h"
@@ skipping 210 matching lines @@
   return sockets_->Get(extension_->id(), channel_id);
 }
 
 void CastChannelAsyncApiFunction::SetResultFromChannelInfo(
     const ChannelInfo& channel_info) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   SetResult(channel_info.ToValue());
 }
 
 CastChannelOpenFunction::CastChannelOpenFunction()
-    : new_channel_id_(0) {
-}
+    : new_channel_id_(0), nonce_(base::GenerateGUID()) {}
 
 CastChannelOpenFunction::~CastChannelOpenFunction() { }
 
 net::IPEndPoint* CastChannelOpenFunction::ParseConnectInfo(
     const ConnectInfo& connect_info) {
   net::IPAddress ip_address;
   CHECK(ip_address.AssignFromIPLiteral(connect_info.ip_address));
   return new net::IPEndPoint(ip_address,
                              static_cast<uint16_t>(connect_info.port));
 }
@@ skipping 53 matching lines @@
     socket = test_socket.release();
   } else {
     socket = new cast_channel::CastSocketImpl(
         extension_->id(), *ip_endpoint_, channel_auth_,
         ExtensionsBrowserClient::Get()->GetNetLog(),
         base::TimeDelta::FromMilliseconds(connect_info.timeout.get()
                                               ? *connect_info.timeout
                                               : kDefaultConnectTimeoutMillis),
         liveness_timeout_ > base::TimeDelta(), api_->GetLogger(),
         connect_info.capabilities.get() ? *connect_info.capabilities
-                                        : CastDeviceCapability::NONE);
+                                        : CastDeviceCapability::NONE,
+        nonce_);
   }
   new_channel_id_ = AddSocket(socket);
   api_->GetLogger()->LogNewSocketEvent(*socket);
 
   // Construct read delegates.
   std::unique_ptr<api::cast_channel::CastTransport::Delegate> delegate(
       base::MakeUnique<CastMessageHandler>(
           base::Bind(&CastChannelAPI::SendEvent, api_->AsWeakPtr()), socket,
           api_->GetLogger()));
   if (socket->keep_alive()) {
@@ skipping 226 matching lines @@
   return true;
 }
 
 void CastChannelSetAuthorityKeysFunction::AsyncWorkStart() {
   // TODO(eroman): crbug.com/601171: Delete this once the API is
   // removed. It is currently a no-op.
   AsyncWorkCompleted();
 }
 
 }  // namespace extensions