Provide RSA2048 as per RFC

webrtc/base/opensslstreamadapter.cc

 /*
  *  Copyright 2004 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.
  */
 
@@ skipping 1110 matching lines @@
 #ifdef HAVE_DTLS_SRTP
   return true;
 #else
   return false;
 #endif
 }
 
 std::string OpenSSLStreamAdapter::GetDefaultSslCipher(
     SSLProtocolVersion version,
     KeyType key_type) {
-  if (key_type == KT_RSA) {
+  if (key_type == KT_RSA1024 || key_type == KT_RSA2048) {
     switch (version) {
       case SSL_PROTOCOL_TLS_10:
       case SSL_PROTOCOL_TLS_11:
         return kDefaultSslCipher10;
       case SSL_PROTOCOL_TLS_12:
       default:
 #ifdef OPENSSL_IS_BORINGSSL
         if (EVP_has_aes_hardware()) {
           return kDefaultSslCipher12;
         } else {
@@ skipping 21 matching lines @@
 #endif
     }
   } else {
     return std::string();
   }
 }
 
 }  // namespace rtc
 
 #endif  // HAVE_OPENSSL_SSL_H