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*
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* 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 0000000
* @summary DHKeyAgreement3
* @author Jan Luehe
*/
import java.io.*;
import java.math.BigInteger;
import java.security.*;
import java.security.spec.*;
import java.security.interfaces.*;
import javax.crypto.*;
import javax.crypto.spec.*;
import javax.crypto.interfaces.*;
/**
* This test utility executes the Diffie-Hellman key agreement protocol
* between 3 parties: Alice, Bob, and Carol.
*
* We use the same 1024 bit prime modulus and base generator that are used by
* SKIP.
*/
public class DHKeyAgreement3 {
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 {
DHParameterSpec dhSkipParamSpec;
System.err.println("Using SKIP Diffie-Hellman parameters");
dhSkipParamSpec = new DHParameterSpec(skip1024Modulus, skip1024Base);
// Alice creates her own DH key pair
System.err.println("ALICE: Generate DH keypair ...");
KeyPairGenerator aliceKpairGen = KeyPairGenerator.getInstance("DH", "SunJCE");
aliceKpairGen.initialize(dhSkipParamSpec);
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(dhSkipParamSpec);
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(dhSkipParamSpec);
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: " + toHexString(aliceSharedSecret));
byte[] bobSharedSecret = bobKeyAgree.generateSecret();
int bobLen = bobSharedSecret.length;
System.out.println("Bob secret: " + toHexString(bobSharedSecret));
byte[] carolSharedSecret = carolKeyAgree.generateSecret();
int carolLen = carolSharedSecret.length;
System.out.println("Carol secret: " + toHexString(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]);
}
/*
* Converts a byte array to hex string
*/
private String toHexString(byte[] block) {
StringBuffer buf = new StringBuffer();
int len = block.length;
for (int i = 0; i < len; i++) {
byte2hex(block[i], buf);
if (i < len-1) {
buf.append(":");
}
}
return buf.toString();
}
/*
* Prints the usage of this test.
*/
private void usage() {
System.err.print("DHKeyAgreement usage: ");
System.err.println("[-gen]");
}
// The 1024 bit Diffie-Hellman modulus values used by SKIP
private static final byte skip1024ModulusBytes[] = {
(byte)0xF4, (byte)0x88, (byte)0xFD, (byte)0x58,
(byte)0x4E, (byte)0x49, (byte)0xDB, (byte)0xCD,
(byte)0x20, (byte)0xB4, (byte)0x9D, (byte)0xE4,
(byte)0x91, (byte)0x07, (byte)0x36, (byte)0x6B,
(byte)0x33, (byte)0x6C, (byte)0x38, (byte)0x0D,
(byte)0x45, (byte)0x1D, (byte)0x0F, (byte)0x7C,
(byte)0x88, (byte)0xB3, (byte)0x1C, (byte)0x7C,
(byte)0x5B, (byte)0x2D, (byte)0x8E, (byte)0xF6,
(byte)0xF3, (byte)0xC9, (byte)0x23, (byte)0xC0,
(byte)0x43, (byte)0xF0, (byte)0xA5, (byte)0x5B,
(byte)0x18, (byte)0x8D, (byte)0x8E, (byte)0xBB,
(byte)0x55, (byte)0x8C, (byte)0xB8, (byte)0x5D,
(byte)0x38, (byte)0xD3, (byte)0x34, (byte)0xFD,
(byte)0x7C, (byte)0x17, (byte)0x57, (byte)0x43,
(byte)0xA3, (byte)0x1D, (byte)0x18, (byte)0x6C,
(byte)0xDE, (byte)0x33, (byte)0x21, (byte)0x2C,
(byte)0xB5, (byte)0x2A, (byte)0xFF, (byte)0x3C,
(byte)0xE1, (byte)0xB1, (byte)0x29, (byte)0x40,
(byte)0x18, (byte)0x11, (byte)0x8D, (byte)0x7C,
(byte)0x84, (byte)0xA7, (byte)0x0A, (byte)0x72,
(byte)0xD6, (byte)0x86, (byte)0xC4, (byte)0x03,
(byte)0x19, (byte)0xC8, (byte)0x07, (byte)0x29,
(byte)0x7A, (byte)0xCA, (byte)0x95, (byte)0x0C,
(byte)0xD9, (byte)0x96, (byte)0x9F, (byte)0xAB,
(byte)0xD0, (byte)0x0A, (byte)0x50, (byte)0x9B,
(byte)0x02, (byte)0x46, (byte)0xD3, (byte)0x08,
(byte)0x3D, (byte)0x66, (byte)0xA4, (byte)0x5D,
(byte)0x41, (byte)0x9F, (byte)0x9C, (byte)0x7C,
(byte)0xBD, (byte)0x89, (byte)0x4B, (byte)0x22,
(byte)0x19, (byte)0x26, (byte)0xBA, (byte)0xAB,
(byte)0xA2, (byte)0x5E, (byte)0xC3, (byte)0x55,
(byte)0xE9, (byte)0x2F, (byte)0x78, (byte)0xC7
};
// The SKIP 1024 bit modulus
private static final BigInteger skip1024Modulus
= new BigInteger(1, skip1024ModulusBytes);
// The base used with the SKIP 1024 bit modulus
private static final BigInteger skip1024Base = BigInteger.valueOf(2);
}