RTCCertificate serialization.

webrtc/base/rtccertificate.h

Index: webrtc/base/rtccertificate.h
diff --git a/webrtc/base/rtccertificate.h b/webrtc/base/rtccertificate.h
index 3d4f36e6a3e9886c70ba516bb77225929a1807b9..46d6fd427cf0e09d63e811c91dd22ab12de9c1e1 100644
--- a/webrtc/base/rtccertificate.h
+++ b/webrtc/base/rtccertificate.h
@@ -20,6 +20,28 @@
 
 namespace rtc {
 
+// This class contains PEM strings of an RTCCertificate's private key and
+// certificate and acts as a text representation of RTCCertificate. Certificates
+// can be serialized and deserialized to and from this format, which allows for
+// cloning and storing of certificates to disk. The PEM format is that of
+// |SSLIdentity::PrivateKeyToPEMString| and |SSLCertificate::ToPEMString|, e.g.
+// the string representations used by OpenSSL.
+class RTCCertificatePEM {
+ public:
+  RTCCertificatePEM(
+      const std::string& private_key,
+      const std::string& certificate)
+      : private_key_(private_key),
+        certificate_(certificate) {}
+
+  const std::string& private_key() const { return private_key_; }
+  const std::string& certificate() const { return certificate_; }
+
+ private:
+  std::string private_key_;
+  std::string certificate_;
+};
+
 // A thin abstraction layer between "lower level crypto stuff" like
 // SSLCertificate and WebRTC usage. Takes ownership of some lower level objects,
 // reference counting protects these from premature destruction.
@@ -42,6 +64,12 @@ class RTCCertificate : public RefCountInterface {
   // However, some places might need SSLIdentity* for its public/private key...
   SSLIdentity* identity() const { return identity_.get(); }
 
+  // To/from PEM, a text representation of the RTCCertificate.
+  RTCCertificatePEM ToPEM() const;
+  static scoped_refptr<RTCCertificate> FromPEM(const RTCCertificatePEM& pem);
+  bool operator==(const RTCCertificate& certificate) const;
+  bool operator!=(const RTCCertificate& certificate) const;
+
  protected:
   explicit RTCCertificate(SSLIdentity* identity);
   ~RTCCertificate() override;