package org.bouncycastle.jce.provider.test;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.jce.ECPointUtil;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.util.encoders.Hex;
import org.bouncycastle.util.test.SimpleTest;
import javax.crypto.KeyAgreement;
import javax.crypto.SecretKey;
import javax.crypto.interfaces.DHPrivateKey;
import javax.crypto.interfaces.DHPublicKey;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.DHParameterSpec;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.math.BigInteger;
import java.security.AlgorithmParameterGenerator;
import java.security.AlgorithmParameters;
import java.security.Key;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.SecureRandom;
import java.security.Security;
import java.security.interfaces.ECPrivateKey;
import java.security.interfaces.ECPublicKey;
import java.security.spec.ECFieldFp;
import java.security.spec.ECParameterSpec;
import java.security.spec.EllipticCurve;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
public class DHTest
extends SimpleTest
{
private BigInteger g512 = new BigInteger("153d5d6172adb43045b68ae8e1de1070b6137005686d29d3d73a7749199681ee5b212c9b96bfdcfa5b20cd5e3fd2044895d609cf9b410b7a0f12ca1cb9a428cc", 16);
private BigInteger p512 = new BigInteger("9494fec095f3b85ee286542b3836fc81a5dd0a0349b4c239dd38744d488cf8e31db8bcb7d33b41abb9e5a33cca9144b1cef332c94bf0573bf047a3aca98cdf3b", 16);
private BigInteger g768 = new BigInteger("7c240073c1316c621df461b71ebb0cdcc90a6e5527e5e126633d131f87461c4dc4afc60c2cb0f053b6758871489a69613e2a8b4c8acde23954c08c81cbd36132cfd64d69e4ed9f8e51ed6e516297206672d5c0a69135df0a5dcf010d289a9ca1", 16);
private BigInteger p768 = new BigInteger("8c9dd223debed1b80103b8b309715be009d48860ed5ae9b9d5d8159508efd802e3ad4501a7f7e1cfec78844489148cd72da24b21eddd01aa624291c48393e277cfc529e37075eccef957f3616f962d15b44aeab4039d01b817fde9eaa12fd73f", 16);
private BigInteger g1024 = new BigInteger("1db17639cdf96bc4eabba19454f0b7e5bd4e14862889a725c96eb61048dcd676ceb303d586e30f060dbafd8a571a39c4d823982117da5cc4e0f89c77388b7a08896362429b94a18a327604eb7ff227bffbc83459ade299e57b5f77b50fb045250934938efa145511166e3197373e1b5b1e52de713eb49792bedde722c6717abf", 16);
private BigInteger p1024 = new BigInteger("a00e283b3c624e5b2b4d9fbc2653b5185d99499b00fd1bf244c6f0bb817b4d1c451b2958d62a0f8a38caef059fb5ecd25d75ed9af403f5b5bdab97a642902f824e3c13789fed95fa106ddfe0ff4a707c85e2eb77d49e68f2808bcea18ce128b178cd287c6bc00efa9a1ad2a673fe0dceace53166f75b81d6709d5f8af7c66bb7", 16);
public String getName()
{
return "DH";
}
private void testGP(
int size,
int privateValueSize,
BigInteger g,
BigInteger p)
throws Exception
{
DHParameterSpec dhParams = new DHParameterSpec(p, g, privateValueSize);
KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DH", "BC");
keyGen.initialize(dhParams);
//
// a side
//
KeyPair aKeyPair = keyGen.generateKeyPair();
KeyAgreement aKeyAgree = KeyAgreement.getInstance("DH", "BC");
checkKeySize(privateValueSize, aKeyPair);
aKeyAgree.init(aKeyPair.getPrivate());
//
// b side
//
KeyPair bKeyPair = keyGen.generateKeyPair();
KeyAgreement bKeyAgree = KeyAgreement.getInstance("DH", "BC");
checkKeySize(privateValueSize, bKeyPair);
bKeyAgree.init(bKeyPair.getPrivate());
//
// agreement
//
aKeyAgree.doPhase(bKeyPair.getPublic(), true);
bKeyAgree.doPhase(aKeyPair.getPublic(), true);
BigInteger k1 = new BigInteger(aKeyAgree.generateSecret());
BigInteger k2 = new BigInteger(bKeyAgree.generateSecret());
if (!k1.equals(k2))
{
fail(size + " bit 2-way test failed");
}
//
// public key encoding test
//
byte[] pubEnc = aKeyPair.getPublic().getEncoded();
KeyFactory keyFac = KeyFactory.getInstance("DH", "BC");
X509EncodedKeySpec pubX509 = new X509EncodedKeySpec(pubEnc);
DHPublicKey pubKey = (DHPublicKey)keyFac.generatePublic(pubX509);
DHParameterSpec spec = pubKey.getParams();
if (!spec.getG().equals(dhParams.getG()) || !spec.getP().equals(dhParams.getP()))
{
fail(size + " bit public key encoding/decoding test failed on parameters");
}
if (!((DHPublicKey)aKeyPair.getPublic()).getY().equals(pubKey.getY()))
{
fail(size + " bit public key encoding/decoding test failed on y value");
}
//
// public key serialisation test
//
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
ObjectOutputStream oOut = new ObjectOutputStream(bOut);
oOut.writeObject(aKeyPair.getPublic());
ByteArrayInputStream bIn = new ByteArrayInputStream(bOut.toByteArray());
ObjectInputStream oIn = new ObjectInputStream(bIn);
pubKey = (DHPublicKey)oIn.readObject();
spec = pubKey.getParams();
if (!spec.getG().equals(dhParams.getG()) || !spec.getP().equals(dhParams.getP()))
{
fail(size + " bit public key serialisation test failed on parameters");
}
if (!((DHPublicKey)aKeyPair.getPublic()).getY().equals(pubKey.getY()))
{
fail(size + " bit public key serialisation test failed on y value");
}
//
// private key encoding test
//
byte[] privEnc = aKeyPair.getPrivate().getEncoded();
PKCS8EncodedKeySpec privPKCS8 = new PKCS8EncodedKeySpec(privEnc);
DHPrivateKey privKey = (DHPrivateKey)keyFac.generatePrivate(privPKCS8);
spec = privKey.getParams();
if (!spec.getG().equals(dhParams.getG()) || !spec.getP().equals(dhParams.getP()))
{
fail(size + " bit private key encoding/decoding test failed on parameters");
}
if (!((DHPrivateKey)aKeyPair.getPrivate()).getX().equals(privKey.getX()))
{
fail(size + " bit private key encoding/decoding test failed on y value");
}
//
// private key serialisation test
//
bOut = new ByteArrayOutputStream();
oOut = new ObjectOutputStream(bOut);
oOut.writeObject(aKeyPair.getPrivate());
bIn = new ByteArrayInputStream(bOut.toByteArray());
oIn = new ObjectInputStream(bIn);
privKey = (DHPrivateKey)oIn.readObject();
spec = privKey.getParams();
if (!spec.getG().equals(dhParams.getG()) || !spec.getP().equals(dhParams.getP()))
{
fail(size + " bit private key serialisation test failed on parameters");
}
if (!((DHPrivateKey)aKeyPair.getPrivate()).getX().equals(privKey.getX()))
{
fail(size + " bit private key serialisation test failed on y value");
}
//
// three party test
//
KeyPairGenerator aPairGen = KeyPairGenerator.getInstance("DH", "BC");
aPairGen.initialize(spec);
KeyPair aPair = aPairGen.generateKeyPair();
KeyPairGenerator bPairGen = KeyPairGenerator.getInstance("DH", "BC");
bPairGen.initialize(spec);
KeyPair bPair = bPairGen.generateKeyPair();
KeyPairGenerator cPairGen = KeyPairGenerator.getInstance("DH", "BC");
cPairGen.initialize(spec);
KeyPair cPair = cPairGen.generateKeyPair();
aKeyAgree.init(aPair.getPrivate());
bKeyAgree.init(bPair.getPrivate());
KeyAgreement cKeyAgree = KeyAgreement.getInstance("DH", "BC");
cKeyAgree.init(cPair.getPrivate());
Key ac = aKeyAgree.doPhase(cPair.getPublic(), false);
Key ba = bKeyAgree.doPhase(aPair.getPublic(), false);
Key cb = cKeyAgree.doPhase(bPair.getPublic(), false);
aKeyAgree.doPhase(cb, true);
bKeyAgree.doPhase(ac, true);
cKeyAgree.doPhase(ba, true);
BigInteger aShared = new BigInteger(aKeyAgree.generateSecret());
BigInteger bShared = new BigInteger(bKeyAgree.generateSecret());
BigInteger cShared = new BigInteger(cKeyAgree.generateSecret());
if (!aShared.equals(bShared))
{
fail(size + " bit 3-way test failed (a and b differ)");
}
if (!cShared.equals(bShared))
{
fail(size + " bit 3-way test failed (c and b differ)");
}
}
private void testExplicitWrapping(
int size,
int privateValueSize,
BigInteger g,
BigInteger p)
throws Exception
{
DHParameterSpec dhParams = new DHParameterSpec(p, g, privateValueSize);
KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DH", "BC");
keyGen.initialize(dhParams);
//
// a side
//
KeyPair aKeyPair = keyGen.generateKeyPair();
KeyAgreement aKeyAgree = KeyAgreement.getInstance("DH", "BC");
checkKeySize(privateValueSize, aKeyPair);
aKeyAgree.init(aKeyPair.getPrivate());
//
// b side
//
KeyPair bKeyPair = keyGen.generateKeyPair();
KeyAgreement bKeyAgree = KeyAgreement.getInstance("DH", "BC");
checkKeySize(privateValueSize, bKeyPair);
bKeyAgree.init(bKeyPair.getPrivate());
//
// agreement
//
aKeyAgree.doPhase(bKeyPair.getPublic(), true);
bKeyAgree.doPhase(aKeyPair.getPublic(), true);
SecretKey k1 = aKeyAgree.generateSecret(PKCSObjectIdentifiers.id_alg_CMS3DESwrap.getId());
SecretKey k2 = aKeyAgree.generateSecret(PKCSObjectIdentifiers.id_alg_CMS3DESwrap.getId());
}
private void checkKeySize(int privateValueSize, KeyPair aKeyPair)
{
if (privateValueSize != 0)
{
DHPrivateKey key = (DHPrivateKey)aKeyPair.getPrivate();
if (key.getX().bitLength() != privateValueSize)
{
fail("limited key check failed for key size " + privateValueSize);
}
}
}
private void testRandom(
int size)
throws Exception
{
AlgorithmParameterGenerator a = AlgorithmParameterGenerator.getInstance("DH", "BC");
a.init(size, new SecureRandom());
AlgorithmParameters params = a.generateParameters();
byte[] encodeParams = params.getEncoded();
AlgorithmParameters a2 = AlgorithmParameters.getInstance("DH", "BC");
a2.init(encodeParams);
// a and a2 should be equivalent!
byte[] encodeParams_2 = a2.getEncoded();
if (!areEqual(encodeParams, encodeParams_2))
{
fail("encode/decode parameters failed");
}
DHParameterSpec dhP = (DHParameterSpec)params.getParameterSpec(DHParameterSpec.class);
testGP(size, 0, dhP.getG(), dhP.getP());
}
private void testECDH(String algorithm)
throws Exception
{
KeyPairGenerator g = KeyPairGenerator.getInstance(algorithm, "BC");
EllipticCurve curve = new EllipticCurve(
new ECFieldFp(new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839")), // q
new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16), // a
new BigInteger("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16)); // b
ECParameterSpec ecSpec = new ECParameterSpec(
curve,
ECPointUtil.decodePoint(curve, Hex.decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // G
new BigInteger("883423532389192164791648750360308884807550341691627752275345424702807307"), // n
1); // h
g.initialize(ecSpec, new SecureRandom());
//
// a side
//
KeyPair aKeyPair = g.generateKeyPair();
KeyAgreement aKeyAgree = KeyAgreement.getInstance(algorithm, "BC");
aKeyAgree.init(aKeyPair.getPrivate());
//
// b side
//
KeyPair bKeyPair = g.generateKeyPair();
KeyAgreement bKeyAgree = KeyAgreement.getInstance(algorithm, "BC");
bKeyAgree.init(bKeyPair.getPrivate());
//
// agreement
//
aKeyAgree.doPhase(bKeyPair.getPublic(), true);
bKeyAgree.doPhase(aKeyPair.getPublic(), true);
BigInteger k1 = new BigInteger(aKeyAgree.generateSecret());
BigInteger k2 = new BigInteger(bKeyAgree.generateSecret());
if (!k1.equals(k2))
{
fail(algorithm + " 2-way test failed");
}
//
// public key encoding test
//
byte[] pubEnc = aKeyPair.getPublic().getEncoded();
KeyFactory keyFac = KeyFactory.getInstance(algorithm, "BC");
X509EncodedKeySpec pubX509 = new X509EncodedKeySpec(pubEnc);
ECPublicKey pubKey = (ECPublicKey)keyFac.generatePublic(pubX509);
if (!pubKey.getW().equals(((ECPublicKey)aKeyPair.getPublic()).getW()))
{
System.out.println(" expected " + pubKey.getW().getAffineX() + " got " + ((ECPublicKey)aKeyPair.getPublic()).getW().getAffineX());
System.out.println(" expected " + pubKey.getW().getAffineY() + " got " + ((ECPublicKey)aKeyPair.getPublic()).getW().getAffineY());
fail(algorithm + " public key encoding (W test) failed");
}
if (!pubKey.getParams().getGenerator().equals(((ECPublicKey)aKeyPair.getPublic()).getParams().getGenerator()))
{
fail(algorithm + " public key encoding (G test) failed");
}
//
// private key encoding test
//
byte[] privEnc = aKeyPair.getPrivate().getEncoded();
PKCS8EncodedKeySpec privPKCS8 = new PKCS8EncodedKeySpec(privEnc);
ECPrivateKey privKey = (ECPrivateKey)keyFac.generatePrivate(privPKCS8);
if (!privKey.getS().equals(((ECPrivateKey)aKeyPair.getPrivate()).getS()))
{
fail(algorithm + " private key encoding (S test) failed");
}
if (!privKey.getParams().getGenerator().equals(((ECPrivateKey)aKeyPair.getPrivate()).getParams().getGenerator()))
{
fail(algorithm + " private key encoding (G test) failed");
}
}
private void testExceptions()
{
try
{
KeyAgreement aKeyAgree = KeyAgreement.getInstance("DH", "BC");
aKeyAgree.generateSecret("DES");
}
catch (IllegalStateException e)
{
// okay
}
catch (Exception e)
{
fail("Unexpected exception: " + e, e);
}
}
private void testDESAndDESede(BigInteger g, BigInteger p)
throws Exception
{
DHParameterSpec dhParams = new DHParameterSpec(p, g, 256);
KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DH", "BC");
keyGen.initialize(dhParams);
KeyPair kp = keyGen.generateKeyPair();
KeyAgreement keyAgreement = KeyAgreement.getInstance("DH", "BC");
keyAgreement.init(kp.getPrivate());
keyAgreement.doPhase(kp.getPublic(), true);
SecretKey key = keyAgreement.generateSecret("DES");
if (key.getEncoded().length != 8)
{
fail("DES length wrong");
}
if (!DESKeySpec.isParityAdjusted(key.getEncoded(), 0))
{
fail("DES parity wrong");
}
key = keyAgreement.generateSecret("DESEDE");
if (key.getEncoded().length != 24)
{
fail("DESEDE length wrong");
}
if (!DESedeKeySpec.isParityAdjusted(key.getEncoded(), 0))
{
fail("DESEDE parity wrong");
}
key = keyAgreement.generateSecret("Blowfish");
if (key.getEncoded().length != 56)
{
fail("Blowfish length wrong");
}
}
public void performTest()
throws Exception
{
testGP(512, 0, g512, p512);
testGP(768, 0, g768, p768);
testGP(1024, 0, g1024, p1024);
testGP(512, 64, g512, p512);
testGP(768, 128, g768, p768);
testGP(1024, 256, g1024, p1024);
testExplicitWrapping(512, 0, g512, p512);
testRandom(256);
testECDH("ECDH");
testECDH("ECDHC");
testExceptions();
testDESAndDESede(g768, p768);
}
public static void main(
String[] args)
{
Security.addProvider(new BouncyCastleProvider());
runTest(new DHTest());
}
}