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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

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 */

/*

 * @test

 * @bug 8048819

 * @summary This test stressful verifies the assertion of "The secret keys generated

 * by all involved parties should be the same." for javax.crypto.KeyAgreement

 * @run main SameDHKeyStressTest

 */

import java.security.AlgorithmParameterGenerator;

import java.security.InvalidAlgorithmParameterException;

import java.security.InvalidKeyException;

import java.security.Key;

import java.security.KeyPair;

import java.security.KeyPairGenerator;

import java.security.NoSuchAlgorithmException;

import java.security.NoSuchProviderException;

import java.security.spec.AlgorithmParameterSpec;

import java.util.Arrays;

import javax.crypto.KeyAgreement;

import javax.crypto.SecretKey;

import javax.crypto.spec.DHGenParameterSpec;

import javax.crypto.spec.DHParameterSpec;

public class SameDHKeyStressTest {

    static final String[] ALGORITHMS = {"DH", "DiffieHellman", "dh", "diffieHELLMAN"};

    static final String[] SECRET_ALOGRITHMS = {"DES", "DESede", "blowfish"};

    static final int[] NUMBER_OF_PARTIES = {2, 3, 4};

    static final String[] PA_NAMES = {"Alice", "Bob", "Carol", "David"};

    public static void main(String args[]) {

        int failedCnt = 0;

        StringBuilder failedList = new StringBuilder("Failed List:");

        for (String algorithm : ALGORITHMS) {

            for (int numOfParties : NUMBER_OF_PARTIES) {

                for (String secretAlgorithm : SECRET_ALOGRITHMS) {

                    if (!runTest(algorithm, numOfParties, secretAlgorithm)) {

                        failedCnt++;

                        failedList.append("\n Altorightm = ").append(algorithm).

                                append(" Number of Parties = ").append(numOfParties).

                                append(" Secret Algorithm = ").append(secretAlgorithm);

                    }

                }

            }

        } //end of for loop

        if (failedCnt > 0) {

            System.out.println(failedList);

            throw new RuntimeException("SameDHKeyStressTest Failed");

        }

    }

    public static boolean runTest(String algo, int numParties, String secretAlgo) {

        KAParticipant[] parties = new KAParticipant[numParties];

        Key[] keyArchives = new Key[numParties];

        try {

            // generate AlogirhtmParameterSpec

            AlgorithmParameterGenerator apg = AlgorithmParameterGenerator.getInstance("DH","SunJCE");

            AlgorithmParameterSpec aps = new DHGenParameterSpec(512, 64);

            apg.init(aps);

            DHParameterSpec spec = apg.generateParameters().

                    getParameterSpec(DHParameterSpec.class);

            //initilize all KeyAgreement participants

            for (int i = 0; i < numParties; i++) {

                parties[i] = new KAParticipant(PA_NAMES[i], algo);

                parties[i].initialize(spec);

                keyArchives[i] = parties[i].getPublicKey();

            }

            // Do all phases in the KeyAgreement for all participants

            Key[] keyBuffer = new Key[numParties];

            boolean lastPhase = false;

            for (int j = 0; j < numParties - 1; j++) {

                if (j == numParties - 2) {

                    lastPhase = true;

                }

                for (int k = 0; k < numParties; k++) {

                    if (k == numParties - 1) {

                        keyBuffer[k] = parties[k].doPhase(keyArchives[0], lastPhase);

                    } else {

                        keyBuffer[k] = parties[k].doPhase(keyArchives[k + 1], lastPhase);

                    }

                }

                System.arraycopy(keyBuffer, 0, keyArchives, 0, numParties);

            }

            //Comparison: The secret keys generated by all involved parties should be the same

            SecretKey[] sKeys = new SecretKey[numParties];

            for (int n = 0; n < numParties; n++) {

                sKeys[n] = parties[n].generateSecret(secretAlgo);

            }

            for (int q = 0; q < numParties - 1; q++) {

                if (!Arrays.equals(sKeys[q].getEncoded(), sKeys[q + 1].getEncoded())) {

                    return false;

                }

            }

            return true;

        } catch (Exception ex) {

            ex.printStackTrace();

            return false;

        }

    }

}

class KAParticipant {

    private String name = null;

    private String algorithm = null;

    private KeyPairGenerator keyGen = null;

    private KeyPair keys = null;

    private KeyAgreement ka = null;

    public KAParticipant(String pName, String algo) throws NoSuchAlgorithmException, NoSuchProviderException {

        name = pName;

        algorithm = algo;

        keyGen = KeyPairGenerator.getInstance(algo,"SunJCE");

        ka = KeyAgreement.getInstance(algo,"SunJCE");

    }

    public void initialize(AlgorithmParameterSpec spec) throws InvalidAlgorithmParameterException, InvalidKeyException {

        keyGen.initialize(spec);

        keys = keyGen.generateKeyPair();

        ka.init(keys.getPrivate());

    }

    public Key doPhase(Key key, boolean lastPhase) throws InvalidKeyException {

        return ka.doPhase(key, lastPhase);

    }

    public Key getPublicKey() {

        return keys.getPublic();

    }

    public byte[] generateSecret() {

        return ka.generateSecret();

    }

    public SecretKey generateSecret(String algo) throws java.lang.IllegalStateException,

            java.security.NoSuchAlgorithmException,

            java.security.InvalidKeyException {

        return ka.generateSecret(algo);

    }

}