package org.bouncycastle.jce.provider.test;
import org.bouncycastle.asn1.ASN1InputStream;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERInteger;
import org.bouncycastle.jce.ECPointUtil;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.util.BigIntegers;
import org.bouncycastle.util.encoders.Hex;
import org.bouncycastle.util.test.FixedSecureRandom;
import org.bouncycastle.util.test.SimpleTest;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.SecureRandom;
import java.security.Security;
import java.security.Signature;
import java.security.interfaces.ECPrivateKey;
import java.security.interfaces.ECPublicKey;
import java.security.spec.ECFieldF2m;
import java.security.spec.ECFieldFp;
import java.security.spec.ECParameterSpec;
import java.security.spec.ECPoint;
import java.security.spec.ECPrivateKeySpec;
import java.security.spec.ECPublicKeySpec;
import java.security.spec.EllipticCurve;
public class ECDSA5Test
extends SimpleTest
{
byte[] k1 = Hex.decode("d5014e4b60ef2ba8b6211b4062ba3224e0427dd3");
byte[] k2 = Hex.decode("345e8d05c075c3a508df729a1685690e68fcfb8c8117847e89063bca1f85d968fd281540b6e13bd1af989a1fbf17e06462bf511f9d0b140fb48ac1b1baa5bded");
SecureRandom random = new FixedSecureRandom(new byte[][] { k1, k2 });
private void decodeTest()
{
EllipticCurve curve = new EllipticCurve(
new ECFieldFp(new BigInteger("6277101735386680763835789423207666416083908700390324961279")), // q
new BigInteger("fffffffffffffffffffffffffffffffefffffffffffffffc", 16), // a
new BigInteger("64210519e59c80e70fa7e9ab72243049feb8deecc146b9b1", 16)); // b
ECPoint p = ECPointUtil.decodePoint(curve, Hex.decode("03188da80eb03090f67cbf20eb43a18800f4ff0afd82ff1012"));
if (!p.getAffineX().equals(new BigInteger("188da80eb03090f67cbf20eb43a18800f4ff0afd82ff1012", 16)))
{
fail("x uncompressed incorrectly");
}
if (!p.getAffineY().equals(new BigInteger("7192b95ffc8da78631011ed6b24cdd573f977a11e794811", 16)))
{
fail("y uncompressed incorrectly");
}
}
/**
* X9.62 - 1998,<br>
* J.3.2, Page 155, ECDSA over the field Fp<br>
* an example with 239 bit prime
*/
private void testECDSA239bitPrime()
throws Exception
{
BigInteger r = new BigInteger("308636143175167811492622547300668018854959378758531778147462058306432176");
BigInteger s = new BigInteger("323813553209797357708078776831250505931891051755007842781978505179448783");
byte[] kData = BigIntegers.asUnsignedByteArray(new BigInteger("700000017569056646655505781757157107570501575775705779575555657156756655"));
SecureRandom k = new FixedSecureRandom(kData);
EllipticCurve curve = new EllipticCurve(
new ECFieldFp(new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839")), // q
new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16), // a
new BigInteger("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16)); // b
ECParameterSpec spec = new ECParameterSpec(
curve,
ECPointUtil.decodePoint(curve, Hex.decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // G
new BigInteger("883423532389192164791648750360308884807550341691627752275345424702807307"), // n
1); // h
ECPrivateKeySpec priKey = new ECPrivateKeySpec(
new BigInteger("876300101507107567501066130761671078357010671067781776716671676178726717"), // d
spec);
ECPublicKeySpec pubKey = new ECPublicKeySpec(
ECPointUtil.decodePoint(curve, Hex.decode("025b6dc53bc61a2548ffb0f671472de6c9521a9d2d2534e65abfcbd5fe0c70")), // Q
spec);
Signature sgr = Signature.getInstance("ECDSA", "BC");
KeyFactory f = KeyFactory.getInstance("ECDSA", "BC");
PrivateKey sKey = f.generatePrivate(priKey);
PublicKey vKey = f.generatePublic(pubKey);
sgr.initSign(sKey, k);
byte[] message = new byte[] { (byte)'a', (byte)'b', (byte)'c' };
sgr.update(message);
byte[] sigBytes = sgr.sign();
sgr.initVerify(vKey);
sgr.update(message);
if (!sgr.verify(sigBytes))
{
fail("239 Bit EC verification failed");
}
BigInteger[] sig = derDecode(sigBytes);
if (!r.equals(sig[0]))
{
fail("r component wrong." + System.getProperty("line.separator")
+ " expecting: " + r + System.getProperty("line.separator")
+ " got : " + sig[0]);
}
if (!s.equals(sig[1]))
{
fail("s component wrong." + System.getProperty("line.separator")
+ " expecting: " + s + System.getProperty("line.separator")
+ " got : " + sig[1]);
}
}
/**
* X9.62 - 1998,<br>
* J.2.1, Page 100, ECDSA over the field F2m<br>
* an example with 191 bit binary field
*/
private void testECDSA239bitBinary()
throws Exception
{
BigInteger r = new BigInteger("21596333210419611985018340039034612628818151486841789642455876922391552");
BigInteger s = new BigInteger("197030374000731686738334997654997227052849804072198819102649413465737174");
byte[] kData = BigIntegers.asUnsignedByteArray(new BigInteger("171278725565216523967285789236956265265265235675811949404040041670216363"));
SecureRandom k = new FixedSecureRandom(kData);
EllipticCurve curve = new EllipticCurve(
new ECFieldF2m(239, // m
new int[] { 36 }), // k
new BigInteger("32010857077C5431123A46B808906756F543423E8D27877578125778AC76", 16), // a
new BigInteger("790408F2EEDAF392B012EDEFB3392F30F4327C0CA3F31FC383C422AA8C16", 16)); // b
ECParameterSpec params = new ECParameterSpec(
curve,
ECPointUtil.decodePoint(curve, Hex.decode("0457927098FA932E7C0A96D3FD5B706EF7E5F5C156E16B7E7C86038552E91D61D8EE5077C33FECF6F1A16B268DE469C3C7744EA9A971649FC7A9616305")), // G
new BigInteger("220855883097298041197912187592864814557886993776713230936715041207411783"), // n
4); // h
ECPrivateKeySpec priKeySpec = new ECPrivateKeySpec(
new BigInteger("145642755521911534651321230007534120304391871461646461466464667494947990"), // d
params);
ECPublicKeySpec pubKeySpec = new ECPublicKeySpec(
ECPointUtil.decodePoint(curve, Hex.decode("045894609CCECF9A92533F630DE713A958E96C97CCB8F5ABB5A688A238DEED6DC2D9D0C94EBFB7D526BA6A61764175B99CB6011E2047F9F067293F57F5")), // Q
params);
Signature sgr = Signature.getInstance("ECDSA", "BC");
KeyFactory f = KeyFactory.getInstance("ECDSA", "BC");
PrivateKey sKey = f.generatePrivate(priKeySpec);
PublicKey vKey = f.generatePublic(pubKeySpec);
byte[] message = new byte[] { (byte)'a', (byte)'b', (byte)'c' };
sgr.initSign(sKey, k);
sgr.update(message);
byte[] sigBytes = sgr.sign();
sgr.initVerify(vKey);
sgr.update(message);
if (!sgr.verify(sigBytes))
{
fail("239 Bit EC verification failed");
}
BigInteger[] sig = derDecode(sigBytes);
if (!r.equals(sig[0]))
{
fail("r component wrong." + System.getProperty("line.separator")
+ " expecting: " + r + System.getProperty("line.separator")
+ " got : " + sig[0]);
}
if (!s.equals(sig[1]))
{
fail("s component wrong." + System.getProperty("line.separator")
+ " expecting: " + s + System.getProperty("line.separator")
+ " got : " + sig[1]);
}
}
private void testGeneration()
throws Exception
{
//
// ECDSA generation test
//
byte[] data = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 };
Signature s = Signature.getInstance("ECDSA", "BC");
KeyPairGenerator g = KeyPairGenerator.getInstance("ECDSA", "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());
KeyPair p = g.generateKeyPair();
PrivateKey sKey = p.getPrivate();
PublicKey vKey = p.getPublic();
s.initSign(sKey);
s.update(data);
byte[] sigBytes = s.sign();
s = Signature.getInstance("ECDSA", "BC");
s.initVerify(vKey);
s.update(data);
if (!s.verify(sigBytes))
{
fail("ECDSA verification failed");
}
testKeyFactory((ECPublicKey)vKey, (ECPrivateKey)sKey);
}
private void testKeyFactory(ECPublicKey pub, ECPrivateKey priv)
throws Exception
{
KeyFactory ecFact = KeyFactory.getInstance("ECDSA");
ECPublicKeySpec pubSpec = (ECPublicKeySpec)ecFact.getKeySpec(pub, ECPublicKeySpec.class);
ECPrivateKeySpec privSpec = (ECPrivateKeySpec)ecFact.getKeySpec(priv, ECPrivateKeySpec.class);
if (!pubSpec.getW().equals(pub.getW()) || !pubSpec.getParams().getCurve().equals(pub.getParams().getCurve()))
{
fail("pubSpec not correct");
}
if (!privSpec.getS().equals(priv.getS()) || !privSpec.getParams().getCurve().equals(priv.getParams().getCurve()))
{
fail("privSpec not correct");
}
ECPublicKey pubKey = (ECPublicKey)ecFact.translateKey(pub);
ECPrivateKey privKey = (ECPrivateKey)ecFact.translateKey(priv);
if (!pubKey.getW().equals(pub.getW()) || !pubKey.getParams().getCurve().equals(pub.getParams().getCurve()))
{
fail("pubKey not correct");
}
if (!privKey.getS().equals(priv.getS()) || !privKey.getParams().getCurve().equals(priv.getParams().getCurve()))
{
fail("privKey not correct");
}
}
protected BigInteger[] derDecode(
byte[] encoding)
throws IOException
{
ByteArrayInputStream bIn = new ByteArrayInputStream(encoding);
ASN1InputStream aIn = new ASN1InputStream(bIn);
ASN1Sequence s = (ASN1Sequence)aIn.readObject();
BigInteger[] sig = new BigInteger[2];
sig[0] = ((DERInteger)s.getObjectAt(0)).getValue();
sig[1] = ((DERInteger)s.getObjectAt(1)).getValue();
return sig;
}
public String getName()
{
return "ECDSA5";
}
public void performTest()
throws Exception
{
decodeTest();
testECDSA239bitPrime();
testECDSA239bitBinary();
testGeneration();
}
public static void main(
String[] args)
{
Security.addProvider(new BouncyCastleProvider());
runTest(new ECDSA5Test());
}
}