RTCCertificateGeneratorInterface and RTCCertificateGeneratorStoreWrapper added.

webrtc/base/rtccertificategenerator.h

 /*
  *  Copyright 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #ifndef WEBRTC_BASE_RTCCERTIFICATEGENERATOR_H_
 #define WEBRTC_BASE_RTCCERTIFICATEGENERATOR_H_
 
 #include "webrtc/base/optional.h"
 #include "webrtc/base/refcount.h"
 #include "webrtc/base/rtccertificate.h"
 #include "webrtc/base/scoped_ref_ptr.h"
 #include "webrtc/base/sslidentity.h"
 #include "webrtc/base/thread.h"
 
 namespace rtc {
 
+// See |RTCCertificateGeneratorInterface::GenerateCertificateAsync|.
 class RTCCertificateGeneratorCallback : public RefCountInterface {
  public:
   virtual void OnSuccess(
     const scoped_refptr<RTCCertificate>& certificate) = 0;
   virtual void OnFailure() = 0;
 
  protected:
   ~RTCCertificateGeneratorCallback() override {}
 };
 
 // Generates |RTCCertificate|s.
+// See |RTCCertificateGenerator| for the WebRTC repo's implementation.
+class RTCCertificateGeneratorInterface {
+ public:
+  virtual ~RTCCertificateGeneratorInterface() {}
+
+  // Generates a certificate asynchronously on the worker thread.
+  // Must be called on the signaling thread. The |callback| is invoked with the
+  // result on the signaling thread. |exipres_ms| optionally specifies for how
+  // long we want the certificate to be valid, but the implementation may choose
+  // its own restrictions on the expiration time.
+  virtual void GenerateCertificateAsync(
+      const KeyParams& key_params,
+      const Optional<uint64_t>& expires_ms,
+      const scoped_refptr<RTCCertificateGeneratorCallback>& callback) = 0;
+};
+
+// Standard implementation of |RTCCertificateGeneratorInterface|.
 // The static function |GenerateCertificate| generates a certificate on the
 // current thread. The |RTCCertificateGenerator| instance generates certificates
 // asynchronously on the worker thread with |GenerateCertificateAsync|.
-class RTCCertificateGenerator {
+class RTCCertificateGenerator : public RTCCertificateGeneratorInterface {
  public:
   // Generates a certificate on the current thread. Returns null on failure.
   // If |expires_ms| is specified, the certificate will expire in approximately
   // that many milliseconds from now. |expires_ms| is limited to a year, a
   // larger value than that is clamped down to a year. If |expires_ms| is not
   // specified, a default expiration time is used.
   static scoped_refptr<RTCCertificate> GenerateCertificate(
       const KeyParams& key_params,
       const Optional<uint64_t>& expires_ms);
 
   RTCCertificateGenerator(Thread* signaling_thread, Thread* worker_thread);
+  ~RTCCertificateGenerator() override {}
 
-  // Generates a certificate asynchronously on the worker thread.
-  // Must be called on the signaling thread. The |callback| is invoked with the
-  // result on the signaling thread. If |expires_ms| is specified, the
-  // certificate will expire in approximately that many milliseconds from now.
-  // |expires_ms| is limited to a year, a larger value than that is clamped down
-  // to a year. If |expires_ms| is not  specified, a default expiration time is
-  // used.
+  // |RTCCertificateGeneratorInterface| overrides.
+  // If |expires_ms| is specified, the certificate will expire in approximately
+  // that many milliseconds from now. |expires_ms| is limited to a year, a
+  // larger value than that is clamped down to a year. If |expires_ms| is not
+  // specified, a default expiration time is used.
   void GenerateCertificateAsync(
       const KeyParams& key_params,
       const Optional<uint64_t>& expires_ms,
-      const scoped_refptr<RTCCertificateGeneratorCallback>& callback);
+      const scoped_refptr<RTCCertificateGeneratorCallback>& callback) override;
 
  private:
   Thread* const signaling_thread_;
   Thread* const worker_thread_;
 };
 
 }  // namespace rtc
 
 #endif  // WEBRTC_BASE_RTCCERTIFICATEGENERATOR_H_