test/com/sun/crypto/provider/Mac/HmacPBESHA1.java

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/**
 * @test
 * @bug 4893959
 * @summary basic test for HmacPBESHA1
 * @author Valerie Peng
 */
import java.io.PrintStream;
import java.util.*;
import java.security.*;
import java.security.spec.*;

import javax.crypto.*;
import javax.crypto.spec.*;

public class HmacPBESHA1 {
    private static final String MAC_ALGO = "HmacPBESHA1";
    private static final String KEY_ALGO = "PBE";
    private static final String PROVIDER = "SunJCE";

    private SecretKey key = null;

    public static void main(String argv[]) throws Exception {
        HmacPBESHA1 test = new HmacPBESHA1();
        test.run();
        System.out.println("Test Passed");
    }

    public void run() throws Exception {
        if (key == null) {
            char[] password = { 't', 'e', 's', 't' };
            PBEKeySpec keySpec = new PBEKeySpec(password);
            SecretKeyFactory kf = SecretKeyFactory.getInstance(KEY_ALGO, PROVIDER);
            key = kf.generateSecret(keySpec);
        }
        Mac mac = Mac.getInstance(MAC_ALGO, PROVIDER);
        byte[] plainText = new byte[30];

        mac.init(key);
        mac.update(plainText);
        byte[] value1 = mac.doFinal();
        if (value1.length != 20) {
            throw new Exception("incorrect MAC output length, " +
                                "expected 20, got " + value1.length);
        }
        mac.update(plainText);
        byte[] value2 = mac.doFinal();
        if (!Arrays.equals(value1, value2)) {
            throw new Exception("generated different MAC outputs");
        }
    }
}