package gnu.testlet.gnu.crypto.key.dh;
// ----------------------------------------------------------------------------
// $Id: TestOfDHKeyAgreements.java,v 1.2 2005/10/06 04:24:20 rsdio Exp $
//
// Copyright (C) 2003 Free Software Foundation, Inc.
//
// This file is part of GNU Crypto.
//
// GNU Crypto is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or (at your option)
// any later version.
//
// GNU Crypto 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 for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; see the file COPYING. If not, write to the
//
// Free Software Foundation Inc.,
// 51 Franklin Street, Fifth Floor,
// Boston, MA 02110-1301
// USA
//
// Linking this library statically or dynamically with other modules is
// making a combined work based on this library. Thus, the terms and
// conditions of the GNU General Public License cover the whole
// combination.
//
// As a special exception, the copyright holders of this library give
// you permission to link this library with independent modules to
// produce an executable, regardless of the license terms of these
// independent modules, and to copy and distribute the resulting
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// library, you may extend this exception to your version of the
// library, but you are not obligated to do so. If you do not wish to
// do so, delete this exception statement from your version.
// ----------------------------------------------------------------------------
// Tags: GNU-CRYPTO
import gnu.crypto.Registry;
import gnu.crypto.key.IKeyAgreementParty;
import gnu.crypto.key.IKeyPairGenerator;
import gnu.crypto.key.KeyPairGeneratorFactory;
import gnu.crypto.key.KeyAgreementException;
import gnu.crypto.key.IncomingMessage;
import gnu.crypto.key.OutgoingMessage;
import gnu.crypto.key.dh.DiffieHellmanKeyAgreement;
import gnu.crypto.key.dh.DiffieHellmanReceiver;
import gnu.crypto.key.dh.DiffieHellmanSender;
import gnu.crypto.key.dh.ElGamalReceiver;
import gnu.crypto.key.dh.ElGamalSender;
import gnu.crypto.key.dh.ElGamalKeyAgreement;
import gnu.crypto.util.Util;
import gnu.testlet.TestHarness;
import gnu.testlet.Testlet;
import java.security.KeyPair;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
/**
* <p>A test case for the Diffie-Hellman key agreements, both the Static-Static
* (basic version) and the Ephemeral-Static (ElGamal) modes.</p>
*
* @version $Revision: 1.2 $
*/
public class TestOfDHKeyAgreements implements Testlet {
// Constants and variables
// -------------------------------------------------------------------------
private KeyPair kpA, kpB;
private IKeyAgreementParty A, B;
// Constructor(s)
// -------------------------------------------------------------------------
// default 0-arguments constructor
// Class methods
// -------------------------------------------------------------------------
// Instance methods
// -------------------------------------------------------------------------
public void test(TestHarness harness) {
testOfStaticStatic(harness);
testOfEphemeralStatic(harness);
}
public void testOfStaticStatic(TestHarness harness) {
harness.checkPoint("TestOfDHKeyAgreements.testOfStaticStatic");
setUp();
A = new DiffieHellmanSender();
B = new DiffieHellmanReceiver();
Map mapA = new HashMap();
mapA.put(
DiffieHellmanKeyAgreement.KA_DIFFIE_HELLMAN_OWNER_PRIVATE_KEY,
kpA.getPrivate());
Map mapB = new HashMap();
mapB.put(
DiffieHellmanKeyAgreement.KA_DIFFIE_HELLMAN_OWNER_PRIVATE_KEY,
kpB.getPrivate());
try {
A.init(mapA);
} catch (KeyAgreementException x) {
harness.debug(x);
harness.fail("while initialising A");
}
harness.check(!A.isComplete(), "A is ready");
try {
B.init(mapB);
} catch (KeyAgreementException x) {
harness.debug(x);
harness.fail("while initialising B");
}
harness.check(!B.isComplete(), "B is ready");
// (1) A -> B: g**x mod p
OutgoingMessage out = null;
try {
out = A.processMessage(null);
} catch (KeyAgreementException x) {
harness.debug(x);
harness.fail("while A is in step #1");
}
harness.check(!A.isComplete(), "A is OK after step #1");
// (2) B -> A: g^^y mod p
IncomingMessage in = null;
try {
in = new IncomingMessage(out.toByteArray());
} catch (KeyAgreementException x) {
harness.debug(x);
harness.fail("while feeding B, A's incoming message");
}
out = null;
try {
out = B.processMessage(in);
} catch (KeyAgreementException x) {
harness.debug(x);
harness.fail("while B is in step #1");
}
harness.check(B.isComplete(), "B is complete after step #1");
byte[] k2 = null;
try {
k2 = B.getSharedSecret();
} catch (KeyAgreementException x) {
harness.fail("while accessing B's version of the shared secret");
}
// A computes the shared secret
in = null;
try {
in = new IncomingMessage(out.toByteArray());
} catch (KeyAgreementException x) {
harness.debug(x);
harness.fail("while feeding A, B's incoming message");
}
out = null;
try {
out = A.processMessage(in);
} catch (KeyAgreementException x) {
harness.debug(x);
harness.fail("while A is in step #2");
}
harness.check(A.isComplete(), "A is complete after step #2");
byte[] k1 = null;
try {
k1 = A.getSharedSecret();
} catch (KeyAgreementException x) {
harness.fail("while accessing A's version of the shared secret");
}
harness.check(Arrays.equals(k1, k2), "A and B share the same secret");
}
public void testOfEphemeralStatic(TestHarness harness) {
harness.checkPoint("TestOfDHKeyAgreements.testOfEphemeralStatic");
setUp();
A = new ElGamalSender();
B = new ElGamalReceiver();
Map mapA = new HashMap();
mapA.put(
ElGamalKeyAgreement.KA_ELGAMAL_RECIPIENT_PUBLIC_KEY,
kpB.getPublic());
Map mapB = new HashMap();
mapB.put(
ElGamalKeyAgreement.KA_ELGAMAL_RECIPIENT_PRIVATE_KEY,
kpB.getPrivate());
try {
A.init(mapA);
} catch (KeyAgreementException x) {
harness.debug(x);
harness.fail("while initialising A");
}
harness.check(!A.isComplete(), "A is ready");
try {
B.init(mapB);
} catch (KeyAgreementException x) {
harness.debug(x);
harness.fail("while initialising B");
}
harness.check(!B.isComplete(), "B is ready");
// (1) A -> B: g**x mod p
OutgoingMessage out = null;
try {
out = A.processMessage(null);
} catch (KeyAgreementException x) {
harness.debug(x);
harness.fail("while A is in step #1");
}
harness.check(A.isComplete(), "A is complete after step #1");
IncomingMessage in = null;
try {
in = new IncomingMessage(out.toByteArray());
} catch (KeyAgreementException x) {
harness.debug(x);
harness.fail("while feeding B, A's incoming message");
}
out = null;
try {
out = B.processMessage(in);
} catch (KeyAgreementException x) {
harness.debug(x);
harness.fail("while B is in step #1");
}
harness.check(B.isComplete(), "B is complete after step #1");
byte[] k1 = null;
try {
k1 = A.getSharedSecret();
} catch (KeyAgreementException x) {
harness.fail("while accessing A's version of the shared secret");
}
byte[] k2 = null;
try {
k2 = B.getSharedSecret();
} catch (KeyAgreementException x) {
harness.fail("while accessing B's version of the shared secret");
}
harness.check(Arrays.equals(k1, k2), "A and B share the same secret");
}
// helper methods ----------------------------------------------------------
private void setUp() {
IKeyPairGenerator kpg = KeyPairGeneratorFactory.getInstance(Registry.DH_KPG);
kpg.setup(new HashMap()); // use default values
kpA = kpg.generate();
kpB = kpg.generate();
}
}