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/*
* Copyright (c) 1998, 2024, Oracle and/or its affiliates. All rights reserved.
* 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.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 0000000
* @library /test/lib
* @summary DHKeyAgreement3
* @author Jan Luehe
*/
import java.io.*;
import java.math.BigInteger;
import java.security.*;
import java.security.spec.*;
import java.security.interfaces.*;
import java.util.HexFormat;
import javax.crypto.*;
import javax.crypto.spec.*;
import javax.crypto.interfaces.*;
import jdk.test.lib.security.DiffieHellmanGroup;
import jdk.test.lib.security.SecurityUtils;
/**
* This test utility executes the Diffie-Hellman key agreement protocol
* between 3 parties: Alice, Bob, and Carol.
*
* By default, preconfigured parameters are used.
*/
public class DHKeyAgreement3 {
// Hex formatter to upper case with ":" delimiter
private static final HexFormat HEX_FORMATTER = HexFormat.ofDelimiter(":").withUpperCase();
private DHKeyAgreement3() {}
public static void main(String argv[]) throws Exception {
DHKeyAgreement3 keyAgree = new DHKeyAgreement3();
keyAgree.run();
System.out.println("Test Passed");
}
private void run() throws Exception {
DiffieHellmanGroup dhGroup = SecurityUtils.getTestDHGroup();
DHParameterSpec dhParamSpec;
System.err.println("Using " + dhGroup.name() + " Diffie-Hellman parameters");
dhParamSpec = new DHParameterSpec(dhGroup.getPrime(), dhGroup.getBase());
// Alice creates her own DH key pair
System.err.println("ALICE: Generate DH keypair ...");
KeyPairGenerator aliceKpairGen = KeyPairGenerator.getInstance("DH", "SunJCE");
aliceKpairGen.initialize(dhParamSpec);
KeyPair aliceKpair = aliceKpairGen.generateKeyPair();
// Bob creates his own DH key pair
System.err.println("BOB: Generate DH keypair ...");
KeyPairGenerator bobKpairGen = KeyPairGenerator.getInstance("DH", "SunJCE");
bobKpairGen.initialize(dhParamSpec);
KeyPair bobKpair = bobKpairGen.generateKeyPair();
// Carol creates her own DH key pair
System.err.println("CAROL: Generate DH keypair ...");
KeyPairGenerator carolKpairGen = KeyPairGenerator.getInstance("DH", "SunJCE");
carolKpairGen.initialize(dhParamSpec);
KeyPair carolKpair = carolKpairGen.generateKeyPair();
// Alice initialize
System.err.println("ALICE: Initialize ...");
KeyAgreement aliceKeyAgree = KeyAgreement.getInstance("DH", "SunJCE");
aliceKeyAgree.init(aliceKpair.getPrivate());
// Bob initialize
System.err.println("BOB: Initialize ...");
KeyAgreement bobKeyAgree = KeyAgreement.getInstance("DH", "SunJCE");
bobKeyAgree.init(bobKpair.getPrivate());
// Carol initialize
System.err.println("CAROL: Initialize ...");
KeyAgreement carolKeyAgree = KeyAgreement.getInstance("DH", "SunJCE");
carolKeyAgree.init(carolKpair.getPrivate());
// Alice uses Carol's public key
Key ac = aliceKeyAgree.doPhase(carolKpair.getPublic(), false);
// Bob uses Alice's public key
Key ba = bobKeyAgree.doPhase(aliceKpair.getPublic(), false);
// Carol uses Bob's public key
Key cb = carolKeyAgree.doPhase(bobKpair.getPublic(), false);
// Alice uses Carol's result from above
aliceKeyAgree.doPhase(cb, true);
// Bob uses Alice's result from above
bobKeyAgree.doPhase(ac, true);
// Carol uses Bob's result from above
carolKeyAgree.doPhase(ba, true);
// Alice, Bob and Carol compute their secrets
byte[] aliceSharedSecret = aliceKeyAgree.generateSecret();
int aliceLen = aliceSharedSecret.length;
System.out.println("Alice secret: " + HEX_FORMATTER.formatHex(aliceSharedSecret));
byte[] bobSharedSecret = bobKeyAgree.generateSecret();
int bobLen = bobSharedSecret.length;
System.out.println("Bob secret: " + HEX_FORMATTER.formatHex(bobSharedSecret));
byte[] carolSharedSecret = carolKeyAgree.generateSecret();
int carolLen = carolSharedSecret.length;
System.out.println("Carol secret: " + HEX_FORMATTER.formatHex(carolSharedSecret));
// Compare Alice and Bob
if (aliceLen != bobLen) {
throw new Exception("Alice and Bob have different lengths");
}
for (int i=0; i<aliceLen; i++) {
if (aliceSharedSecret[i] != bobSharedSecret[i]) {
throw new Exception("Alice and Bob differ");
}
}
System.err.println("Alice and Bob are the same");
// Compare Bob and Carol
if (bobLen != carolLen) {
throw new Exception("Bob and Carol have different lengths");
}
for (int i=0; i<bobLen; i++) {
if (bobSharedSecret[i] != carolSharedSecret[i]) {
throw new Exception("Bob and Carol differ");
}
}
System.err.println("Bob and Carol are the same");
}
/*
* Converts a byte to hex digit and writes to the supplied buffer
*/
private void byte2hex(byte b, StringBuffer buf) {
char[] hexChars = { '0', '1', '2', '3', '4', '5', '6', '7', '8',
'9', 'A', 'B', 'C', 'D', 'E', 'F' };
int high = ((b & 0xf0) >> 4);
int low = (b & 0x0f);
buf.append(hexChars[high]);
buf.append(hexChars[low]);
}
/*
* Prints the usage of this test.
*/
private void usage() {
System.err.print("DHKeyAgreement usage: ");
System.err.println("[-gen]");
}
}
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