Provide RSA2048 as per RFC

webrtc/base/nssidentity.cc

Index: webrtc/base/nssidentity.cc
diff --git a/webrtc/base/nssidentity.cc b/webrtc/base/nssidentity.cc
index 6511942a3443eab85f977d24c2a868d7df4f30f7..f32c6c0f2f67f5129dceb901c4aaa9d6e901d635 100644
--- a/webrtc/base/nssidentity.cc
+++ b/webrtc/base/nssidentity.cc
@@ -52,9 +52,9 @@ NSSKeyPair* NSSKeyPair::Generate(KeyType key_type) {
   SECKEYPrivateKey* privkey = nullptr;
   SECKEYPublicKey* pubkey = nullptr;
   SSLKEAType ssl_kea_type;
-  if (key_type == KT_RSA) {
+  if (key_type == KT_RSA1024 || key_type == KT_RSA2048) {
     PK11RSAGenParams rsa_params;
-    rsa_params.keySizeInBits = 1024;
+    rsa_params.keySizeInBits = key_type == KT_RSA1024 ? 1024 : 2048;
     rsa_params.pe = 0x010001;  // 65537 -- a common RSA public exponent.
 
     privkey = PK11_GenerateKeyPair(
@@ -432,7 +432,7 @@ NSSIdentity* NSSIdentity::GenerateInternal(const SSLIdentityParams& params) {
   arena = certificate->arena;
 
   SECOidTag sec_oid;
-  if (params.key_type == KT_RSA) {
+  if (params.key_type == KT_RSA1024 || params.key_type == KT_RSA2048) {
     sec_oid = SEC_OID_PKCS1_SHA256_WITH_RSA_ENCRYPTION;
   } else if (params.key_type == KT_ECDSA) {
     sec_oid = SEC_OID_ANSIX962_ECDSA_SHA256_SIGNATURE;