Chrome is now checking certificate type and needs to be passed the co…

…rrect one in Certificate Request. Certificate WebRTC primarily uses ECDSA, I believe the intent is to support ECDSA, TLS protocol, you need to say so in the CertificateRequest message. (#1105)

Adding ECDSA to DtlsSrtp/DtlsSrtpClient.cs as just to remain in sync with the server code but I have no way to verify that direction.

src/net/DtlsSrtp/DtlsSrtpClient.cs

@@ -45,7 +45,7 @@ public virtual void NotifyServerCertificate(Certificate serverCertificate)
         public virtual TlsCredentials GetClientCredentials(CertificateRequest certificateRequest)
         {
             byte[] certificateTypes = certificateRequest.CertificateTypes;
-            if (certificateTypes == null || !Arrays.Contains(certificateTypes, ClientCertificateType.rsa_sign))
+            if (certificateTypes == null || !Arrays.Contains(certificateTypes, ClientCertificateType.rsa_sign) || !Arrays.Contains(certificateTypes, ClientCertificateType.ecdsa_sign))
             {
                 return null;
             }

src/net/DtlsSrtp/DtlsSrtpServer.cs

@@ -248,7 +248,7 @@ public override CertificateRequest GetCertificateRequest()
                     }
                 }
             }
-            return new CertificateRequest(new byte[] { ClientCertificateType.rsa_sign }, serverSigAlgs, null);
+            return new CertificateRequest(new byte[] { ClientCertificateType.rsa_sign, ClientCertificateType.ecdsa_sign }, serverSigAlgs, null);
         }
 
         public override void NotifyClientCertificate(Certificate clientCertificate)