Added DtlsCertificate, a ref counted object owning an SSLIdentity

talk/app/webrtc/webrtcsessiondescriptionfactory.h

 /*
  * libjingle
  * Copyright 2013 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 10 matching lines @@
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef TALK_APP_WEBRTC_WEBRTCSESSIONDESCRIPTIONFACTORY_H_
 #define TALK_APP_WEBRTC_WEBRTCSESSIONDESCRIPTIONFACTORY_H_
 
+#include "talk/app/webrtc/dtlscertificate.h"
+#include "talk/app/webrtc/dtlsidentitystore.h"
 #include "talk/app/webrtc/peerconnectioninterface.h"
 #include "webrtc/p2p/base/transportdescriptionfactory.h"
 #include "talk/session/media/mediasession.h"
 #include "webrtc/base/messagehandler.h"
 
 namespace cricket {
 class ChannelManager;
 class TransportDescriptionFactory;
 }  // namespace cricket
 
 namespace webrtc {
 class CreateSessionDescriptionObserver;
 class MediaConstraintsInterface;
 class MediaStreamSignaling;
 class SessionDescriptionInterface;
 class WebRtcSession;
 
 // DTLS identity request callback class.
 class WebRtcIdentityRequestObserver : public DTLSIdentityRequestObserver,
                                       public sigslot::has_slots<> {
  public:
   // DTLSIdentityRequestObserver overrides.
   void OnFailure(int error) override;
   void OnSuccess(const std::string& der_cert,
                  const std::string& der_private_key) override;
   void OnSuccessWithIdentityObj(
       rtc::scoped_ptr<rtc::SSLIdentity> identity) override;
 
   sigslot::signal1<int> SignalRequestFailed;
-  sigslot::signal1<rtc::SSLIdentity*> SignalIdentityReady;
+  sigslot::signal1<rtc::scoped_refptr<DtlsCertificate>> SignalCertificateReady;
 };
 
 struct CreateSessionDescriptionRequest {
   enum Type {
     kOffer,
     kAnswer,
   };
 
   CreateSessionDescriptionRequest(
       Type type,
       CreateSessionDescriptionObserver* observer,
       const cricket::MediaSessionOptions& options)
       : type(type),
         observer(observer),
         options(options) {}
 
   Type type;
   rtc::scoped_refptr<CreateSessionDescriptionObserver> observer;
   cricket::MediaSessionOptions options;
 };
 
 // This class is used to create offer/answer session description with regards to
 // the async DTLS identity generation for WebRtcSession.
 // It queues the create offer/answer request until the DTLS identity
 // request has completed, i.e. when OnIdentityRequestFailed or OnIdentityReady
 // is called.
 class WebRtcSessionDescriptionFactory : public rtc::MessageHandler,
                                         public sigslot::has_slots<>  {
  public:
+  // Construct with DTLS disabled.
+  WebRtcSessionDescriptionFactory(
+        rtc::Thread* signaling_thread,
+        rtc::Thread* worker_thread,
+        cricket::ChannelManager* channel_manager,
+        MediaStreamSignaling* mediastream_signaling,
+        WebRtcSession* session,
+        const std::string& session_id,
+        cricket::DataChannelType dct);
+  // Construct with DTLS enabled. If a |dtls_identity_service| is provided, it
+  // is used to generate a certificate, otherwise a default service is used.
   WebRtcSessionDescriptionFactory(
       rtc::Thread* signaling_thread,
+      rtc::Thread* worker_thread,
       cricket::ChannelManager* channel_manager,
       MediaStreamSignaling* mediastream_signaling,
       DTLSIdentityServiceInterface* dtls_identity_service,
-      // TODO(jiayl): remove the dependency on session once b/10226852 is fixed.
       WebRtcSession* session,
       const std::string& session_id,
-      cricket::DataChannelType dct,
-      bool dtls_enabled);
+      cricket::DataChannelType dct);
+  // Construct with DTLS enabled using the specified (already generated)
+  // certificate.
+  WebRtcSessionDescriptionFactory(
+      rtc::Thread* signaling_thread,
+      rtc::Thread* worker_thread,
+      cricket::ChannelManager* channel_manager,
+      MediaStreamSignaling* mediastream_signaling,
+      rtc::scoped_refptr<DtlsCertificate> certificate,
+      WebRtcSession* session,
+      const std::string& session_id,
+      cricket::DataChannelType dct);
   virtual ~WebRtcSessionDescriptionFactory();
 
   static void CopyCandidatesFromSessionDescription(
     const SessionDescriptionInterface* source_desc,
     SessionDescriptionInterface* dest_desc);
 
   void CreateOffer(
       CreateSessionDescriptionObserver* observer,
       const PeerConnectionInterface::RTCOfferAnswerOptions& options);
   void CreateAnswer(
       CreateSessionDescriptionObserver* observer,
       const MediaConstraintsInterface* constraints);
 
   void SetSdesPolicy(cricket::SecurePolicy secure_policy);
   cricket::SecurePolicy SdesPolicy() const;
 
-  sigslot::signal1<rtc::SSLIdentity*> SignalIdentityReady;
+  sigslot::signal1<rtc::scoped_refptr<DtlsCertificate>> SignalCertificateReady;
 
   // For testing.
-  bool waiting_for_identity() const {
-    return identity_request_state_ == IDENTITY_WAITING;
+  bool waiting_for_certificate() const {
+    return certificate_request_state_ == CERTIFICATE_WAITING;
   }
 
  private:
-  enum IdentityRequestState {
-    IDENTITY_NOT_NEEDED,
-    IDENTITY_WAITING,
-    IDENTITY_SUCCEEDED,
-    IDENTITY_FAILED,
+  enum CertificateRequestState {
+    CERTIFICATE_NOT_NEEDED,
+    CERTIFICATE_WAITING,
+    CERTIFICATE_SUCCEEDED,
+    CERTIFICATE_FAILED,
   };
 
+  WebRtcSessionDescriptionFactory(
+        rtc::Thread* signaling_thread,
+        rtc::Thread* worker_thread,
+        cricket::ChannelManager* channel_manager,
+        MediaStreamSignaling* mediastream_signaling,
+        WebRtcSession* session,
+        const std::string& session_id,
+        cricket::DataChannelType dct,
+        bool dtls_enabled);
+
   // MessageHandler implementation.
   virtual void OnMessage(rtc::Message* msg);
 
   void InternalCreateOffer(CreateSessionDescriptionRequest request);
   void InternalCreateAnswer(CreateSessionDescriptionRequest request);
   // Posts failure notifications for all pending session description requests.
   void FailPendingRequests(const std::string& reason);
   void PostCreateSessionDescriptionFailed(
       CreateSessionDescriptionObserver* observer,
       const std::string& error);
   void PostCreateSessionDescriptionSucceeded(
       CreateSessionDescriptionObserver* observer,
       SessionDescriptionInterface* description);
 
   void OnIdentityRequestFailed(int error);
-  void SetIdentity(rtc::SSLIdentity* identity);
+  void SetCertificate(rtc::scoped_refptr<DtlsCertificate> certificate);
 
   std::queue<CreateSessionDescriptionRequest>
       create_session_description_requests_;
   rtc::Thread* const signaling_thread_;
+  rtc::Thread* const worker_thread_;
   MediaStreamSignaling* const mediastream_signaling_;
   cricket::TransportDescriptionFactory transport_desc_factory_;
   cricket::MediaSessionDescriptionFactory session_desc_factory_;
   uint64 session_version_;
+  rtc::scoped_ptr<DtlsIdentityStore> identity_store_;
   rtc::scoped_ptr<DTLSIdentityServiceInterface> identity_service_;
   rtc::scoped_refptr<WebRtcIdentityRequestObserver> identity_request_observer_;
+  // TODO(jiayl): remove the dependency on session once b/10226852 is fixed.
   WebRtcSession* const session_;
   const std::string session_id_;
   const cricket::DataChannelType data_channel_type_;
-  IdentityRequestState identity_request_state_;
+  CertificateRequestState certificate_request_state_;
 
   DISALLOW_COPY_AND_ASSIGN(WebRtcSessionDescriptionFactory);
 };
 }  // namespace webrtc
 
 #endif  // TALK_APP_WEBRTC_WEBRTCSESSIONDESCRIPTIONFACTORY_H_