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package org.uic.barcode.test;
import java.math.BigInteger;
import java.security.InvalidAlgorithmParameterException;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.Provider;
import java.security.PublicKey;
import java.security.SecureRandom;
import java.security.Security;
import java.security.interfaces.ECPublicKey;
import java.security.spec.ECGenParameterSpec;
import java.util.Arrays;
import org.bouncycastle.asn1.sec.SECNamedCurves;
import org.bouncycastle.asn1.x9.ECNamedCurveTable;
import org.bouncycastle.asn1.x9.X9ECParameters;
import org.bouncycastle.crypto.generators.ECKeyPairGenerator;
import org.bouncycastle.crypto.params.ECDomainParameters;
import org.bouncycastle.crypto.params.ECKeyGenerationParameters;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.math.ec.ECCurve;
import org.bouncycastle.math.ec.ECPoint;
import org.bouncycastle.util.encoders.Hex;
import org.junit.Before;
import org.junit.Test;
import org.uic.barcode.utils.AlgorithmNameResolver;
import org.uic.barcode.utils.ECKeyEncoder;
public class ECKeyEncoderTest521 {
public static Provider provider = null;
@Before public void initialize() {
provider = new BouncyCastleProvider();
Security.addProvider(provider);
AlgorithmNameResolver.addMap(AlgorithmNameResolver.TYPE_KEY_GENERATOR_ALG, "1.3.132.0.35", "EC");
}
@Test public void testEncodeCompressed() throws Exception {
for (int i = 0; i < 10; i++) {
String name = "secp521r1";
AlgorithmNameResolver.addMap(AlgorithmNameResolver.TYPE_KEY_GENERATOR_ALG, "1.3.132.0.35", "EC");
ECPublicKey key = createECPublicKey(name);
// some additional encoding tricks
byte[] compressedBC = getCompressed(key,name);
String compressedHexBC = Hex.toHexString(compressedBC);
byte[] publicKeyBytes = ECKeyEncoder.getEncoded(key, ECKeyEncoder.ENCODING_X962_COMPRESSED);
String compressedHex = Hex.toHexString(publicKeyBytes);
if (!compressedHexBC.equals(compressedHex)) {
assert(compressedHexBC.equals(compressedHex));
}
assert(Arrays.equals(compressedBC, publicKeyBytes));
assert(compressedHexBC.equals(compressedHex));
}
}
@Test public void testDecodeCompressed() throws Exception {
for (int i = 0; i < 10; i++) {
String name = "secp521r1";
AlgorithmNameResolver.addMap(AlgorithmNameResolver.TYPE_KEY_GENERATOR_ALG, "1.3.132.0.35", "EC");
ECPublicKey key = createECPublicKey(name);
// some additional encoding tricks
byte[] compressedBC = getCompressed(key,name);
PublicKey publicKey = ECKeyEncoder.fromEncoded(compressedBC, "1.3.132.0.35", provider);
compareKeys((ECPublicKey) publicKey, key);
}
}
@Test public void testEncodeUnCompressed() throws Exception {
for (int i = 0; i < 10; i++) {
String name = "secp521r1";
AlgorithmNameResolver.addMap(AlgorithmNameResolver.TYPE_KEY_GENERATOR_ALG, "1.3.132.0.35", "EC");
ECPublicKey key = createECPublicKey(name);
byte[] uncompressedBC = getUnCompressed(key,name);
//String uncompressedHex = Hex.toHexString(uncompressedBC);
byte[] publicKeyUnComp = ECKeyEncoder.getEncoded(key, ECKeyEncoder.ENCODING_X962_UNCOMPESSED);
if (!Arrays.equals(uncompressedBC, publicKeyUnComp)) {
assert(Arrays.equals(uncompressedBC, publicKeyUnComp));
}
assert(Arrays.equals(uncompressedBC, publicKeyUnComp));
}
}
@Test public void testDecodeUnCompressed() throws Exception {
for (int i = 0; i < 10; i++) {
String name = "secp521r1";
AlgorithmNameResolver.addMap(AlgorithmNameResolver.TYPE_KEY_GENERATOR_ALG, "1.3.132.0.35", "EC");
ECPublicKey key = createECPublicKey(name);
// some additional encoding tricks
byte[] compressedBC = getUnCompressed(key,name);
//String compressedHex = Hex.toHexString(compressedBC);
PublicKey publicKey = ECKeyEncoder.fromEncoded(compressedBC, "1.3.132.0.35", provider);
compareKeys((ECPublicKey) publicKey, key);
}
}
@Test public void testEncodeX509() throws Exception {
for (int i = 0; i < 10; i++) {
String name = "secp521r1";
AlgorithmNameResolver.addMap(AlgorithmNameResolver.TYPE_KEY_GENERATOR_ALG, "1.3.132.0.35", "EC");
ECPublicKey key = createECPublicKey(name);
byte[] publicKeyBcX509 = key.getEncoded();
byte[] publicKeyBytes = ECKeyEncoder.getEncoded(key, ECKeyEncoder.ENCODING_X509);
assert(Arrays.equals(publicKeyBcX509, publicKeyBytes));
}
}
@Test public void testDecodeX509() throws Exception {
for (int i = 0; i < 10; i++) {
String name = "secp521r1";
AlgorithmNameResolver.addMap(AlgorithmNameResolver.TYPE_KEY_GENERATOR_ALG, "1.3.132.0.35", "EC");
ECPublicKey key = createECPublicKey(name);
// some additional encoding tricks
byte[] compressedBC = key.getEncoded();
//String compressedHex = Hex.toHexString(compressedBC);
PublicKey publicKey = ECKeyEncoder.fromEncoded(compressedBC, "1.3.132.0.35", provider);
compareKeys((ECPublicKey) publicKey, key);
}
}
private ECPublicKey createECPublicKey(String name) throws NoSuchAlgorithmException, NoSuchProviderException, InvalidAlgorithmParameterException {
ECKeyPairGenerator gen = new ECKeyPairGenerator();
SecureRandom secureRandom = new SecureRandom();
X9ECParameters secnamecurves = SECNamedCurves.getByName(name);
ECDomainParameters ecParams = new ECDomainParameters(secnamecurves.getCurve(), secnamecurves.getG(),
secnamecurves.getN(), secnamecurves.getH());
ECKeyGenerationParameters keyGenParam = new ECKeyGenerationParameters(ecParams, secureRandom);
gen.init(keyGenParam);
KeyPairGenerator kpg = KeyPairGenerator.getInstance("EC", "BC");
ECGenParameterSpec ecGenParameterSpec = new ECGenParameterSpec("secp521r1");
kpg.initialize(ecGenParameterSpec);
ECPublicKey key = (ECPublicKey) kpg.generateKeyPair().getPublic();
return key;
}
private byte[] getCompressed(ECPublicKey key, String name) {
byte[] x = key.getW().getAffineX().toByteArray();
byte[] y = key.getW().getAffineY().toByteArray();
// assumes that x and y are (unsigned) big endian encoded
BigInteger xbi = new BigInteger(1, x);
BigInteger ybi = new BigInteger(1, y);
X9ECParameters x9 = ECNamedCurveTable.getByName(name);
ECCurve curve = x9.getCurve();
ECPoint point = curve.createPoint(xbi, ybi);
return point.getEncoded(true);
}
private byte[] getUnCompressed(ECPublicKey key, String name) {
byte[] x = key.getW().getAffineX().toByteArray();
byte[] y = key.getW().getAffineY().toByteArray();
// assumes that x and y are (unsigned) big endian encoded
BigInteger xbi = new BigInteger(1, x);
BigInteger ybi = new BigInteger(1, y);
X9ECParameters x9 = ECNamedCurveTable.getByName(name);
ECCurve curve = x9.getCurve();
ECPoint point = curve.createPoint(xbi, ybi);
return point.getEncoded(false);
}
private void compareKeys(ECPublicKey key1, ECPublicKey key2) {
assert(key1.getW().getAffineX().equals(key2.getW().getAffineX()) );
assert(key1.getW().getAffineY().equals(key2.getW().getAffineY()) );
}
}
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