Name: ktR10099 Date: 11/18/2003



There is no wording in the spec, that javax.crypto.Mac.getProvider() can't
return null. Current implementation throws NPE, while trying to retrieve
null provider. Please find below example, demonstrating the bug:
----------------------------------------------------------------
import javax.crypto.*;
import java.security.*;

public class test137 {
    public static void main(String[] args) {
        MyMac mm = new MyMac(null, null, null);
        System.out.println("Mac created");
        System.out.println("Provider : " + mm.getProvider());
        System.out.println("Finished");
    }
}

class MyMac extends Mac {
    public MyMac(MacSpi macSpi, Provider provider,String algorithm) {
        super(macSpi, provider, algorithm);
    }
}
------------------------output of test137-------------------------
java full version "1.5.0-beta-b28"
Mac created
Exception in thread "main" java.lang.NullPointerException
        at javax.crypto.Mac.a(DashoA6275)
        at javax.crypto.Mac.getProvider(DashoA6275)
        at test137.main(test137.java:8)
------------------------------------------------------------------
======================================================================