jdk-24/test/jdk/sun/security/pkcs11/MessageDigest/ReinitDigest.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 /*
 * @test
 * @bug 4856966 8242332 8269276
 * @summary
 * @author Andreas Sterbenz
 * @library /test/lib ..
 * @key randomness
 * @modules jdk.crypto.cryptoki
 * @run main/othervm ReinitDigest
 */
import java.security.MessageDigest;
import java.security.Provider;
import java.util.Arrays;
import java.util.Random;
import java.util.List;

public class ReinitDigest extends PKCS11Test {

    public static void main(String[] args) throws Exception {
        main(new ReinitDigest(), args);
    }

    @Override
    public void main(Provider p) throws Exception {
        List<String> ALGS = getSupportedAlgorithms("MessageDigest", "SHA", p);
        Random r = new Random();
        byte[] data1 = new byte[10 * 1024];
        byte[] data2 = new byte[10 * 1024];
        r.nextBytes(data1);
        r.nextBytes(data2);

        boolean success = true;
        for (String alg : ALGS) {
            try {
                doTest(alg, p, data1, data2);
            } catch (Exception e) {
                System.out.println("Unexpected exception: " + e);
                e.printStackTrace();
                success = false;
            }
        }

        if (!success) {
            throw new RuntimeException("Test failed");
        }
        System.out.println("All tests passed");
    }

    private void doTest(String alg, Provider p, byte[] data1, byte[] data2)
            throws Exception {
        System.out.println("Testing " + alg);
        MessageDigest md1 = MessageDigest.getInstance(alg,
                System.getProperty("test.provider.name", "SUN"));
        byte[] d1 = md1.digest(data1);
        MessageDigest md2 = MessageDigest.getInstance(alg, p);
        checkInstances(md1, md2);
        byte[] d2 = md2.digest(data1);
        check(d1, d2);
        byte[] d3 = md2.digest(data1);
        check(d1, d3);
        md2.update(data2);
        md2.update((byte) 0);
        md2.reset();
        byte[] d4 = md2.digest(data1);
        check(d1, d4);
    }

    private static void check(byte[] d1, byte[] d2) throws Exception {
        if (Arrays.equals(d1, d2) == false) {
            throw new RuntimeException("Digest mismatch");
        }
    }

    private static void checkInstances(MessageDigest md1, MessageDigest md2)
            throws Exception {
        if (md1.equals(md2)) {
            throw new RuntimeException("MD instances should be different");
        }
        if (!md1.getAlgorithm().equals(md2.getAlgorithm())) {
            throw new RuntimeException("Algorithm name should equal");
        }
        if (md1.getProvider().getName().equals(md2.getProvider().getName())) {
            throw new RuntimeException("Provider name should be different");
        }
    }
}