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package org.bouncycastle.crypto.test;
import java.math.BigInteger;
import java.security.SecureRandom;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.x9.ECNamedCurveTable;
import org.bouncycastle.asn1.x9.X9ECParameters;
import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
import org.bouncycastle.crypto.BufferedBlockCipher;
import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.crypto.InvalidCipherTextException;
import org.bouncycastle.crypto.KeyEncoder;
import org.bouncycastle.crypto.KeyGenerationParameters;
import org.bouncycastle.crypto.agreement.ECDHBasicAgreement;
import org.bouncycastle.crypto.digests.SHA1Digest;
import org.bouncycastle.crypto.digests.SHA512Digest;
import org.bouncycastle.crypto.engines.IESEngine;
import org.bouncycastle.crypto.engines.TwofishEngine;
import org.bouncycastle.crypto.generators.ECKeyPairGenerator;
import org.bouncycastle.crypto.generators.EphemeralKeyPairGenerator;
import org.bouncycastle.crypto.generators.KDF2BytesGenerator;
import org.bouncycastle.crypto.kems.ECIESKeyEncapsulation;
import org.bouncycastle.crypto.macs.HMac;
import org.bouncycastle.crypto.modes.CBCBlockCipher;
import org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher;
import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
import org.bouncycastle.crypto.params.ECDomainParameters;
import org.bouncycastle.crypto.params.ECKeyGenerationParameters;
import org.bouncycastle.crypto.params.ECNamedDomainParameters;
import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
import org.bouncycastle.crypto.params.ECPublicKeyParameters;
import org.bouncycastle.crypto.params.IESParameters;
import org.bouncycastle.crypto.params.IESWithCipherParameters;
import org.bouncycastle.crypto.params.KeyParameter;
import org.bouncycastle.crypto.params.ParametersWithIV;
import org.bouncycastle.crypto.parsers.ECIESPublicKeyParser;
import org.bouncycastle.math.ec.ECConstants;
import org.bouncycastle.math.ec.ECCurve;
import org.bouncycastle.util.Arrays;
import org.bouncycastle.util.encoders.Hex;
import org.bouncycastle.util.test.SimpleTest;
/**
* test for ECIES - Elliptic Curve Integrated Encryption Scheme
*/
public class ECIESTest
extends SimpleTest
{
private static byte[] TWOFISH_IV = Hex.decode("000102030405060708090a0b0c0d0e0f");
ECIESTest()
{
}
public String getName()
{
return "ECIES";
}
private void doStaticTest(byte[] iv)
throws Exception
{
BigInteger n = new BigInteger("6277101735386680763835789423176059013767194773182842284081");
ECCurve.Fp curve = new ECCurve.Fp(
new BigInteger("6277101735386680763835789423207666416083908700390324961279"), // q
new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16), // a
new BigInteger("64210519e59c80e70fa7e9ab72243049feb8deecc146b9b1", 16), // b
n, ECConstants.ONE);
ECDomainParameters params = new ECDomainParameters(
curve,
curve.decodePoint(Hex.decode("03188da80eb03090f67cbf20eb43a18800f4ff0afd82ff1012")), // G
n);
ECPrivateKeyParameters priKey = new ECPrivateKeyParameters(
new BigInteger("651056770906015076056810763456358567190100156695615665659"), // d
params);
ECPublicKeyParameters pubKey = new ECPublicKeyParameters(
curve.decodePoint(Hex.decode("0262b12d60690cdcf330babab6e69763b471f994dd702d16a5")), // Q
params);
AsymmetricCipherKeyPair p1 = new AsymmetricCipherKeyPair(pubKey, priKey);
AsymmetricCipherKeyPair p2 = new AsymmetricCipherKeyPair(pubKey, priKey);
//
// stream test
//
IESEngine i1 = new IESEngine(
new ECDHBasicAgreement(),
new KDF2BytesGenerator(new SHA1Digest()),
new HMac(new SHA1Digest()));
IESEngine i2 = new IESEngine(
new ECDHBasicAgreement(),
new KDF2BytesGenerator(new SHA1Digest()),
new HMac(new SHA1Digest()));
byte[] d = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
byte[] e = new byte[] { 8, 7, 6, 5, 4, 3, 2, 1 };
CipherParameters p = new IESParameters(d, e, 64);
i1.init(true, p1.getPrivate(), p2.getPublic(), p);
i2.init(false, p2.getPrivate(), p1.getPublic(), p);
byte[] message = Hex.decode("1234567890abcdef");
byte[] out1 = i1.processBlock(message, 0, message.length);
if (!areEqual(out1, Hex.decode("468d89877e8238802403ec4cb6b329faeccfa6f3a730f2cdb3c0a8e8")))
{
fail("stream cipher test failed on enc");
}
byte[] out2 = i2.processBlock(out1, 0, out1.length);
if (!areEqual(out2, message))
{
fail("stream cipher test failed");
}
//
// twofish with CBC
//
BufferedBlockCipher c1 = new PaddedBufferedBlockCipher(
new CBCBlockCipher(new TwofishEngine()));
BufferedBlockCipher c2 = new PaddedBufferedBlockCipher(
new CBCBlockCipher(new TwofishEngine()));
i1 = new IESEngine(
new ECDHBasicAgreement(),
new KDF2BytesGenerator(new SHA1Digest()),
new HMac(new SHA1Digest()),
c1);
i2 = new IESEngine(
new ECDHBasicAgreement(),
new KDF2BytesGenerator(new SHA1Digest()),
new HMac(new SHA1Digest()),
c2);
d = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
e = new byte[] { 8, 7, 6, 5, 4, 3, 2, 1 };
p = new IESWithCipherParameters(d, e, 64, 128);
if (iv != null)
{
p = new ParametersWithIV(p, iv);
}
i1.init(true, p1.getPrivate(), p2.getPublic(), p);
i2.init(false, p2.getPrivate(), p1.getPublic(), p);
message = Hex.decode("1234567890abcdef");
out1 = i1.processBlock(message, 0, message.length);
if (!areEqual(out1, (iv == null) ?
Hex.decode("b8a06ea5c2b9df28b58a0a90a734cde8c9c02903e5c220021fe4417410d1e53a32a71696")
: Hex.decode("f246b0e26a2711992cac9c590d08e45c5e730b7c0f4218bb064e27b7dd7c8a3bd8bf01c3")))
{
fail("twofish cipher test failed on enc");
}
out2 = i2.processBlock(out1, 0, out1.length);
if (!areEqual(out2, message))
{
fail("twofish cipher test failed");
}
}
private void doShortTest(byte[] iv)
throws Exception
{
BigInteger n = new BigInteger("6277101735386680763835789423176059013767194773182842284081");
ECCurve.Fp curve = new ECCurve.Fp(
new BigInteger("6277101735386680763835789423207666416083908700390324961279"), // q
new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16), // a
new BigInteger("64210519e59c80e70fa7e9ab72243049feb8deecc146b9b1", 16), // b
n, ECConstants.ONE);
ECDomainParameters params = new ECDomainParameters(
curve,
curve.decodePoint(Hex.decode("03188da80eb03090f67cbf20eb43a18800f4ff0afd82ff1012")), // G
n);
ECPrivateKeyParameters priKey = new ECPrivateKeyParameters(
new BigInteger("651056770906015076056810763456358567190100156695615665659"), // d
params);
ECPublicKeyParameters pubKey = new ECPublicKeyParameters(
curve.decodePoint(Hex.decode("0262b12d60690cdcf330babab6e69763b471f994dd702d16a5")), // Q
params);
AsymmetricCipherKeyPair p1 = new AsymmetricCipherKeyPair(pubKey, priKey);
AsymmetricCipherKeyPair p2 = new AsymmetricCipherKeyPair(pubKey, priKey);
//
// stream test - V 0
//
IESEngine i1 = new IESEngine(
new ECDHBasicAgreement(),
new KDF2BytesGenerator(new SHA1Digest()),
new HMac(new SHA1Digest()));
IESEngine i2 = new IESEngine(
new ECDHBasicAgreement(),
new KDF2BytesGenerator(new SHA1Digest()),
new HMac(new SHA1Digest()));
byte[] d = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
byte[] e = new byte[] { 8, 7, 6, 5, 4, 3, 2, 1 };
CipherParameters p = new IESParameters(d, e, 64);
i1.init(true, p1.getPrivate(), p2.getPublic(), p);
i2.init(false, p2.getPrivate(), p1.getPublic(), p);
byte[] message = new byte[0];
byte[] out1 = i1.processBlock(message, 0, message.length);
byte[] out2 = i2.processBlock(out1, 0, out1.length);
if (!areEqual(out2, message))
{
fail("stream cipher test failed");
}
try
{
i2.processBlock(out1, 0, out1.length - 1);
fail("no exception");
}
catch (InvalidCipherTextException ex)
{
if (!"Length of input must be greater than the MAC and V combined".equals(ex.getMessage()))
{
fail("wrong exception");
}
}
// with ephemeral key pair
// Generate the ephemeral key pair
ECKeyPairGenerator gen = new ECKeyPairGenerator();
gen.init(new ECKeyGenerationParameters(params, new SecureRandom()));
EphemeralKeyPairGenerator ephKeyGen = new EphemeralKeyPairGenerator(gen, new KeyEncoder()
{
public byte[] getEncoded(AsymmetricKeyParameter keyParameter)
{
return ((ECPublicKeyParameters)keyParameter).getQ().getEncoded(false);
}
});
i1.init(p2.getPublic(), p, ephKeyGen);
i2.init(p2.getPrivate(), p, new ECIESPublicKeyParser(params));
out1 = i1.processBlock(message, 0, message.length);
out2 = i2.processBlock(out1, 0, out1.length);
if (!areEqual(out2, message))
{
fail("V cipher test failed");
}
try
{
i2.processBlock(out1, 0, out1.length - 1);
fail("no exception");
}
catch (InvalidCipherTextException ex)
{
if (!"Length of input must be greater than the MAC and V combined".equals(ex.getMessage()))
{
fail("wrong exception");
}
}
}
private void doEphemeralTest(byte[] iv, final boolean usePointCompression)
throws Exception
{
BigInteger n = new BigInteger("6277101735386680763835789423176059013767194773182842284081");
ECCurve.Fp curve = new ECCurve.Fp(
new BigInteger("6277101735386680763835789423207666416083908700390324961279"), // q
new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16), // a
new BigInteger("64210519e59c80e70fa7e9ab72243049feb8deecc146b9b1", 16), // b
n, ECConstants.ONE);
ECDomainParameters params = new ECDomainParameters(
curve,
curve.decodePoint(Hex.decode("03188da80eb03090f67cbf20eb43a18800f4ff0afd82ff1012")), // G
n);
ECPrivateKeyParameters priKey = new ECPrivateKeyParameters(
new BigInteger("651056770906015076056810763456358567190100156695615665659"), // d
params);
ECPublicKeyParameters pubKey = new ECPublicKeyParameters(
curve.decodePoint(Hex.decode("0262b12d60690cdcf330babab6e69763b471f994dd702d16a5")), // Q
params);
AsymmetricCipherKeyPair p1 = new AsymmetricCipherKeyPair(pubKey, priKey);
AsymmetricCipherKeyPair p2 = new AsymmetricCipherKeyPair(pubKey, priKey);
// Generate the ephemeral key pair
ECKeyPairGenerator gen = new ECKeyPairGenerator();
gen.init(new ECKeyGenerationParameters(params, new SecureRandom()));
EphemeralKeyPairGenerator ephKeyGen = new EphemeralKeyPairGenerator(gen, new KeyEncoder()
{
public byte[] getEncoded(AsymmetricKeyParameter keyParameter)
{
return ((ECPublicKeyParameters)keyParameter).getQ().getEncoded(usePointCompression);
}
});
//
// stream test
//
IESEngine i1 = new IESEngine(
new ECDHBasicAgreement(),
new KDF2BytesGenerator(new SHA1Digest()),
new HMac(new SHA1Digest()));
IESEngine i2 = new IESEngine(
new ECDHBasicAgreement(),
new KDF2BytesGenerator(new SHA1Digest()),
new HMac(new SHA1Digest()));
byte[] d = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
byte[] e = new byte[] { 8, 7, 6, 5, 4, 3, 2, 1 };
CipherParameters p = new IESParameters(d, e, 64);
i1.init(p2.getPublic(), p, ephKeyGen);
i2.init(p2.getPrivate(), p, new ECIESPublicKeyParser(params));
byte[] message = Hex.decode("1234567890abcdef");
byte[] out1 = i1.processBlock(message, 0, message.length);
byte[] out2 = i2.processBlock(out1, 0, out1.length);
if (!areEqual(out2, message))
{
fail("stream cipher test failed");
}
//
// twofish with CBC
//
BufferedBlockCipher c1 = new PaddedBufferedBlockCipher(
new CBCBlockCipher(new TwofishEngine()));
BufferedBlockCipher c2 = new PaddedBufferedBlockCipher(
new CBCBlockCipher(new TwofishEngine()));
i1 = new IESEngine(
new ECDHBasicAgreement(),
new KDF2BytesGenerator(new SHA1Digest()),
new HMac(new SHA1Digest()),
c1);
i2 = new IESEngine(
new ECDHBasicAgreement(),
new KDF2BytesGenerator(new SHA1Digest()),
new HMac(new SHA1Digest()),
c2);
d = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
e = new byte[] { 8, 7, 6, 5, 4, 3, 2, 1 };
p = new IESWithCipherParameters(d, e, 64, 128);
if (iv != null)
{
p = new ParametersWithIV(p, iv);
}
i1.init(p2.getPublic(), p, ephKeyGen);
i2.init(p2.getPrivate(), p, new ECIESPublicKeyParser(params));
message = Hex.decode("1234567890abcdef");
out1 = i1.processBlock(message, 0, message.length);
out2 = i2.processBlock(out1, 0, out1.length);
if (!areEqual(out2, message))
{
fail("twofish cipher test failed");
}
}
private void doTest(AsymmetricCipherKeyPair p1, AsymmetricCipherKeyPair p2)
throws Exception
{
//
// stream test
//
IESEngine i1 = new IESEngine(
new ECDHBasicAgreement(),
new KDF2BytesGenerator(new SHA1Digest()),
new HMac(new SHA1Digest()));
IESEngine i2 = new IESEngine(
new ECDHBasicAgreement(),
new KDF2BytesGenerator(new SHA1Digest()),
new HMac(new SHA1Digest()));
byte[] d = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
byte[] e = new byte[] { 8, 7, 6, 5, 4, 3, 2, 1 };
IESParameters p = new IESParameters(d, e, 64);
i1.init(true, p1.getPrivate(), p2.getPublic(), p);
i2.init(false, p2.getPrivate(), p1.getPublic(), p);
byte[] message = Hex.decode("1234567890abcdef");
byte[] out1 = i1.processBlock(message, 0, message.length);
byte[] out2 = i2.processBlock(out1, 0, out1.length);
if (!areEqual(out2, message))
{
fail("stream cipher test failed");
}
//
// twofish with CBC
//
BufferedBlockCipher c1 = new PaddedBufferedBlockCipher(
new CBCBlockCipher(new TwofishEngine()));
BufferedBlockCipher c2 = new PaddedBufferedBlockCipher(
new CBCBlockCipher(new TwofishEngine()));
i1 = new IESEngine(
new ECDHBasicAgreement(),
new KDF2BytesGenerator(new SHA1Digest()),
new HMac(new SHA1Digest()),
c1);
i2 = new IESEngine(
new ECDHBasicAgreement(),
new KDF2BytesGenerator(new SHA1Digest()),
new HMac(new SHA1Digest()),
c2);
d = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
e = new byte[] { 8, 7, 6, 5, 4, 3, 2, 1 };
p = new IESWithCipherParameters(d, e, 64, 128);
i1.init(true, p1.getPrivate(), p2.getPublic(), p);
i2.init(false, p2.getPrivate(), p1.getPublic(), p);
message = Hex.decode("1234567890abcdef");
out1 = i1.processBlock(message, 0, message.length);
out2 = i2.processBlock(out1, 0, out1.length);
if (!areEqual(out2, message))
{
fail("twofish cipher test failed");
}
}
public void performTest()
throws Exception
{
doStaticTest(null);
doStaticTest(TWOFISH_IV);
doShortTest(null);
BigInteger n = new BigInteger("6277101735386680763835789423176059013767194773182842284081");
ECCurve.Fp curve = new ECCurve.Fp(
new BigInteger("6277101735386680763835789423207666416083908700390324961279"), // q
new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16), // a
new BigInteger("64210519e59c80e70fa7e9ab72243049feb8deecc146b9b1", 16), // b
n, ECConstants.ONE);
ECDomainParameters params = new ECDomainParameters(
curve,
curve.decodePoint(Hex.decode("03188da80eb03090f67cbf20eb43a18800f4ff0afd82ff1012")), // G
n);
ECKeyPairGenerator eGen = new ECKeyPairGenerator();
KeyGenerationParameters gParam = new ECKeyGenerationParameters(params, new SecureRandom());
eGen.init(gParam);
AsymmetricCipherKeyPair p1 = eGen.generateKeyPair();
AsymmetricCipherKeyPair p2 = eGen.generateKeyPair();
doTest(p1, p2);
doEphemeralTest(null, false);
doEphemeralTest(null, true);
doEphemeralTest(TWOFISH_IV, false);
doEphemeralTest(TWOFISH_IV, true);
doCofactorTest(true, false);
doCofactorTest(false, false);
doCofactorTest(false, true);
doCofactorTest(true, true);
}
private void doCofactorTest(boolean newCofactorMode, boolean oldCofactorMode)
{
/* Create the generator */
ECKeyPairGenerator myGenerator = new ECKeyPairGenerator();
SecureRandom myRandom = new SecureRandom();
String myCurve = "sect571k1"; /* Any curve will do */
/* Lookup the parameters */
X9ECParameters x9 = ECNamedCurveTable.getByName(myCurve);
/* Initialise the generator */
ASN1ObjectIdentifier myOid = ECNamedCurveTable.getOID(myCurve);
ECNamedDomainParameters myDomain = new ECNamedDomainParameters(myOid, x9.getCurve(), x9.getG(), x9.getN(), x9.getH(), x9.getSeed());
ECKeyGenerationParameters myParams = new ECKeyGenerationParameters(myDomain, myRandom);
myGenerator.init(myParams);
/* Create the key Pair */
AsymmetricCipherKeyPair myPair = myGenerator.generateKeyPair();
/* Determine message length */
int myFieldSize = x9.getCurve().getFieldSize();
myFieldSize = (myFieldSize + 8 - 1) / 8;
int myLen = 2 * myFieldSize + 1;
byte[] myMessage = new byte[myLen];
int myKeyLen = 256 / 8;
/* Create agreement */
ECIESKeyEncapsulation myAgreement = new ECIESKeyEncapsulation(new KDF2BytesGenerator(new SHA512Digest()), myRandom, newCofactorMode, oldCofactorMode, false);
myAgreement.init(myPair.getPublic());
KeyParameter mySender = (KeyParameter) myAgreement.encrypt(myMessage, myKeyLen);
byte[] mySenderKey = mySender.getKey();
/* Accept agreement */
myAgreement.init(myPair.getPrivate());
KeyParameter myReceiver = (KeyParameter) myAgreement.decrypt(myMessage, myKeyLen);
byte[] myReceiverKey = myReceiver.getKey();
/* Check that keys match */
isTrue("new " + newCofactorMode + " old " + oldCofactorMode, Arrays.areEqual(mySenderKey, myReceiverKey));
}
public static void main(
String[] args)
{
runTest(new ECIESTest());
}
}