Generates the DTLS identity in browser process and returns it to render process.

content/browser/renderer_host/media/webrtc_identity_service_host.cc

+// Copyright (c) 2013 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 "content/browser/renderer_host/media/webrtc_identity_service_host.h"
+
+#include "base/bind.h"
+#include "base/callback_helpers.h"
+#include "content/browser/media/webrtc_identity_store.h"
+#include "content/common/media/webrtc_identity_messages.h"
+#include "net/base/net_errors.h"
+
+namespace content {
+
+WebRTCIdentityServiceHost::WebRTCIdentityServiceHost(
+    WebRTCIdentityStore* identity_store)
+    : identity_store_(identity_store) {}
+
+WebRTCIdentityServiceHost::~WebRTCIdentityServiceHost() {
+  if (cancel_callback_.is_null())
+    return;
+  cancel_callback_.Run();
+}
+
+bool WebRTCIdentityServiceHost::OnMessageReceived(const IPC::Message& message,
+                                                  bool* message_was_ok) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP_EX(WebRTCIdentityServiceHost, message, *message_was_ok)
+    IPC_MESSAGE_HANDLER(WebRTCIdentityMsg_RequestIdentity, OnRequestIdentity)
+    IPC_MESSAGE_HANDLER(WebRTCIdentityMsg_CancelRequest, OnCancelRequest)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP_EX()
+  return handled;
+}
+
+void WebRTCIdentityServiceHost::OnRequestIdentity(
+    int request_id,
+    const GURL& origin,
+    const std::string& identity_name,
+    const std::string& common_name) {
+  if (!cancel_callback_.is_null()) {
+    DLOG(WARNING)
+        << "The request is rejected because there is already a pending request";
+    SendErrorMessage(request_id, net::ERR_INSUFFICIENT_RESOURCES);
+    return;
+  }
+  cancel_callback_ = identity_store_->RequestIdentity(
+      origin,
+      identity_name,
+      common_name,
+      base::Bind(&WebRTCIdentityServiceHost::OnComplete,
+                 base::Unretained(this),
+                 request_id));
+  if (cancel_callback_.is_null()) {
+    SendErrorMessage(request_id, net::ERR_UNEXPECTED);
+  }
+}
+
+void WebRTCIdentityServiceHost::OnCancelRequest(int request_id) {
+  base::ResetAndReturn(&cancel_callback_);
+}
+
+void WebRTCIdentityServiceHost::OnComplete(int request_id,
+                                           int error,
+                                           const std::string& certificate,
+                                           const std::string& private_key) {
+  cancel_callback_.Reset();
+  if (error == net::OK) {
+    Send(new WebRTCIdentityHostMsg_IdentityReady(
+        request_id, certificate, private_key));
+  } else {
+    SendErrorMessage(request_id, error);
+  }
+}
+
+void WebRTCIdentityServiceHost::SendErrorMessage(int request_id, int error) {
+  Send(new WebRTCIdentityHostMsg_RequestFailed(request_id, error));
+}
+
+}  // namespace content