Test4512704.java

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/*
 * @test
 * @bug 4512704
 * @summary Verify that AES cipher can generate default IV in encrypt mode
 * @author Valerie Peng
 */
import java.io.PrintStream;
import java.security.*;
import java.security.spec.*;
import java.util.Random;

import javax.crypto.*;
import javax.crypto.spec.*;
import java.security.Provider;

public class Test4512704 {
    private static final String ALGO = "AES";
    private static final String PADDING = "NoPadding";
    private static final int KEYSIZE = 16; // in bytes

    public void execute(String mode) throws Exception {

        AlgorithmParameterSpec aps = null;
        String transformation = ALGO + "/" + mode + "/"+PADDING;
        Cipher ci = Cipher.getInstance(transformation, "SunJCE");

        KeyGenerator kg = KeyGenerator.getInstance(ALGO, "SunJCE");
        kg.init(KEYSIZE*8);
        SecretKey key = kg.generateKey();
        // TEST FIX 4512704
        try {
            ci.init(Cipher.ENCRYPT_MODE, key, aps);
        } catch(InvalidAlgorithmParameterException ex) {
            throw new Exception("parameter should be generated when null is specified!");
        }
        System.out.println(transformation + ": Passed");
    }

    public static void main (String[] args) throws Exception {
        Test4512704 test = new Test4512704();
        test.execute("CBC");
        test.execute("GCM");
    }
}