--- a/src/java.security.jgss/share/classes/sun/security/krb5/internal/crypto/CksumType.java	Tue Jul 02 18:24:47 2019 -0400
+++ b/src/java.security.jgss/share/classes/sun/security/krb5/internal/crypto/CksumType.java	Wed Jul 03 11:43:01 2019 +0800
@@ -156,6 +156,11 @@
     public abstract byte[] calculateKeyedChecksum(byte[] data, int size,
         byte[] key, int usage) throws KrbCryptoException;
 
+    public boolean verifyChecksum(byte[] data, byte[] checksum)
+            throws KrbCryptoException {
+        throw new UnsupportedOperationException("Not supported");
+    }
+
     public abstract boolean verifyKeyedChecksum(byte[] data, int size,
         byte[] key, byte[] checksum, int usage) throws KrbCryptoException;