diff --git a/kona-ssl/src/main/java/com/tencent/kona/ssl/KonaSSLProvider.java b/kona-ssl/src/main/java/com/tencent/kona/ssl/KonaSSLProvider.java
index 14ceae5c..b917cab5 100644
--- a/kona-ssl/src/main/java/com/tencent/kona/ssl/KonaSSLProvider.java
+++ b/kona-ssl/src/main/java/com/tencent/kona/ssl/KonaSSLProvider.java
@@ -97,7 +97,8 @@ private static void putEntries(Provider provider) {
         provider.put("Alg.Alias.KeyGenerator.SunTls12KeyMaterial",
                 "SunTlsKeyMaterial");
 
-        provider.put("KeyGenerator.TlsRsaPremasterSecret",
+        provider.put("KeyGenerator.SunTlsRsaPremasterSecret",
                 "com.tencent.kona.sun.security.provider.TlsRsaPremasterSecretGenerator");
+        provider.put("Alg.Alias.KeyGenerator.SunTls12RsaPremasterSecret", "SunTlsRsaPremasterSecret");
     }
 }
diff --git a/kona-ssl/src/main/java/com/tencent/kona/ssl/SSLInsts.java b/kona-ssl/src/main/java/com/tencent/kona/ssl/SSLInsts.java
index e3b43264..bc3db484 100644
--- a/kona-ssl/src/main/java/com/tencent/kona/ssl/SSLInsts.java
+++ b/kona-ssl/src/main/java/com/tencent/kona/ssl/SSLInsts.java
@@ -96,7 +96,7 @@ public static SSLContext getSSLContext(String protocol)
             = new HashSet<>(Arrays.asList(
                     "SunTlsPrf", "SunTls12Prf",
                     "SunTlsMasterSecret", "SunTlsKeyMaterial",
-                    "TlcpSM2PremasterSecret"));
+                    "SunTlsRsaPremasterSecret", "SunTls12RsaPremasterSecret"));
 
     public static KeyGenerator getKeyGenerator(String protocol)
             throws NoSuchAlgorithmException {
diff --git a/kona-ssl/src/main/java/com/tencent/kona/sun/security/ssl/SM2KeyExchange.java b/kona-ssl/src/main/java/com/tencent/kona/sun/security/ssl/SM2KeyExchange.java
index bbc5c42a..55283449 100644
--- a/kona-ssl/src/main/java/com/tencent/kona/sun/security/ssl/SM2KeyExchange.java
+++ b/kona-ssl/src/main/java/com/tencent/kona/sun/security/ssl/SM2KeyExchange.java
@@ -88,7 +88,8 @@ byte[] getEncoded(PublicKey publicKey,
         @SuppressWarnings("deprecation")
         static SM2PremasterSecret createPremasterSecret(
                 ClientHandshakeContext chc) throws GeneralSecurityException {
-            String algorithm = "TlsRsaPremasterSecret";
+            String algorithm = chc.negotiatedProtocol.useTLS12PlusSpec() ?
+                    "SunTls12RsaPremasterSecret" : "SunTlsRsaPremasterSecret";
             KeyGenerator kg = SSLInsts.getKeyGenerator(algorithm);
             TlsRsaPremasterSecretParameterSpec spec =
                     new TlsRsaPremasterSecretParameterSpec(
@@ -105,7 +106,7 @@ static SM2PremasterSecret decode(ServerHandshakeContext shc,
                 throws GeneralSecurityException {
 
             byte[] encoded = null;
-            boolean needFailover = false;
+            boolean needFailover;
             Cipher cipher = CryptoInsts.getCipher("SM2");
             try {
                 // Try UNWRAP_MODE mode firstly.
@@ -117,8 +118,8 @@ static SM2PremasterSecret decode(ServerHandshakeContext shc,
 
                 // The provider selection can be delayed, please don't call
                 // any Cipher method before the call to Cipher.init().
-//                String providerName = cipher.getProvider().getName();
-//                needFailover = !KeyUtil.isOracleJCEProvider(providerName);
+                String providerName = cipher.getProvider().getName();
+                needFailover = !KeyUtil.isOracleJCEProvider(providerName);
             } catch (InvalidKeyException | UnsupportedOperationException iue) {
                 if (SSLLogger.isOn && SSLLogger.isOn("ssl,handshake")) {
                     SSLLogger.warning("The Cipher provider "
@@ -153,7 +154,7 @@ static SM2PremasterSecret decode(ServerHandshakeContext shc,
             } else {
                 // the cipher should have been initialized
                 preMaster = (SecretKey)cipher.unwrap(encrypted,
-                        "TlcpSM2PremasterSecret", Cipher.SECRET_KEY);
+                        "TlsRsaPremasterSecret", Cipher.SECRET_KEY);
             }
 
             return new SM2PremasterSecret(preMaster);
@@ -195,11 +196,8 @@ private static SecretKey generatePremasterSecret(
             }
 
             try {
-                String s = clientVersion == ProtocolVersion.TLCP11.id
-                        ? "Tlcp11PremasterSecret"
-                        : ((clientVersion >= ProtocolVersion.TLS12.id)
-                                ? "SunTls12RsaPremasterSecret"
-                                : "SunTlsRsaPremasterSecret");
+                String s = ((clientVersion >= ProtocolVersion.TLS12.id) ?
+                        "SunTls12RsaPremasterSecret" : "SunTlsRsaPremasterSecret");
                 KeyGenerator kg = CryptoInsts.getKeyGenerator(s);
                 kg.init(new TlsRsaPremasterSecretParameterSpec(
                         clientVersion, serverVersion, encodedSecret),