Example usage for org.bouncycastle.crypto.generators ECKeyPairGenerator ECKeyPairGenerator

List of usage examples for org.bouncycastle.crypto.generators ECKeyPairGenerator ECKeyPairGenerator

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Introduction

In this page you can find the example usage for org.bouncycastle.crypto.generators ECKeyPairGenerator ECKeyPairGenerator.

Prototype

ECKeyPairGenerator

Source Link

Usage

From source file:ECIESTest.java

public TestResult perform() {
    SecureRandom random = new SecureRandom();
    ECCurve.Fp curve = new ECCurve.Fp(
            new BigInteger("883423532389192164791648750360308885314476597252960362792450860609699839"), // q
            new BigInteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16), // a
            new BigInteger("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16)); // b

    ECDomainParameters params = new ECDomainParameters(curve,
            curve.decodePoint(Hex.decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // G
            new BigInteger("883423532389192164791648750360308884807550341691627752275345424702807307")); // n

    ECKeyPairGenerator pGen = new ECKeyPairGenerator();
    ECKeyGenerationParameters genParam = new ECKeyGenerationParameters(params, random);

    pGen.init(genParam);/*from  www .  j a v  a2 s  . c  om*/

    AsymmetricCipherKeyPair p1 = pGen.generateKeyPair();
    AsymmetricCipherKeyPair p2 = pGen.generateKeyPair();

    //
    // 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");

    try {
        byte[] out1 = i1.processBlock(message, 0, message.length);

        byte[] out2 = i2.processBlock(out1, 0, out1.length);

        if (!sameAs(out2, message)) {
            return new SimpleTestResult(false, this.getName() + ": stream cipher test failed");
        }

    } catch (Exception ex) {
        return new SimpleTestResult(false, this.getName() + ": stream cipher test exception " + ex.toString());
    }

    //
    // twofish with IV0 test
    //
    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");

    try {
        byte[] out1 = i1.processBlock(message, 0, message.length);

        byte[] out2 = i2.processBlock(out1, 0, out1.length);

        if (!sameAs(out2, message)) {
            return new SimpleTestResult(false, this.getName() + ": twofish cipher test failed");
        }
    } catch (Exception ex) {
        return new SimpleTestResult(false, this.getName() + ": twofish cipher test exception " + ex.toString());
    }

    return new SimpleTestResult(true, this.getName() + ": Okay");
}

From source file:com.bitsofproof.supernode.api.ECKeyPair.java

License:Apache License

public static ECKeyPair createNew(boolean compressed) {
    ECKeyPairGenerator generator = new ECKeyPairGenerator();
    ECKeyGenerationParameters keygenParams = new ECKeyGenerationParameters(domain, secureRandom);
    generator.init(keygenParams);/*from  w  w w.ja  va2 s. c o  m*/
    AsymmetricCipherKeyPair keypair = generator.generateKeyPair();
    ECPrivateKeyParameters privParams = (ECPrivateKeyParameters) keypair.getPrivate();
    ECPublicKeyParameters pubParams = (ECPublicKeyParameters) keypair.getPublic();
    ECKeyPair k = new ECKeyPair();
    k.priv = privParams.getD();
    k.compressed = compressed;
    if (compressed) {
        ECPoint q = pubParams.getQ();
        k.pub = new ECPoint.Fp(domain.getCurve(), q.getX(), q.getY(), true).getEncoded();
    } else {
        k.pub = pubParams.getQ().getEncoded();
    }
    return k;
}

From source file:com.DSC.crypto.ECKey.java

License:Open Source License

/**
 * ECKey object constructor//from  www.  ja  v  a  2  s  .  co m
 * @param param ECDomainParameters for creating the elliptic curve keypair
 */
public ECKey(ECDomainParameters param) {
    /* Instantiate the elliptic curve key parameters */
    this.ECKeyPairGen = new ECKeyPairGenerator();
    this.keyGenParam = new ECKeyGenerationParameters(param, new SecureRandom());
}

From source file:com.DSC.crypto.ECKey.java

License:Open Source License

/**
 * ECKey object constructor, uses the default key domain parameters
 *///w  w w .j  a v  a 2s . c o m
public ECKey() {
    ECKeyParam param = new ECKeyParam();

    /* Instantiate the elliptic curve key parameters */
    this.ECKeyPairGen = new ECKeyPairGenerator();
    this.keyGenParam = new ECKeyGenerationParameters(param.getECDomainParam(), new SecureRandom());
}

From source file:com.google.bitcoin.core.ECKey.java

License:Apache License

/**
 * Generates an entirely new keypair. Point compression is used so the resulting public key will be 33 bytes
 * (32 for the co-ordinate and 1 byte to represent the y bit).
 *//*from   ww  w  .j a va2  s . c om*/
public ECKey() {
    ECKeyPairGenerator generator = new ECKeyPairGenerator();
    ECKeyGenerationParameters keygenParams = new ECKeyGenerationParameters(CURVE, secureRandom);
    generator.init(keygenParams);
    AsymmetricCipherKeyPair keypair = generator.generateKeyPair();
    ECPrivateKeyParameters privParams = (ECPrivateKeyParameters) keypair.getPrivate();
    ECPublicKeyParameters pubParams = (ECPublicKeyParameters) keypair.getPublic();
    priv = privParams.getD();
    // Unfortunately Bouncy Castle does not let us explicitly change a point to be compressed, even though it
    // could easily do so. We must re-build it here so the ECPoints withCompression flag can be set to true.
    ECPoint uncompressed = pubParams.getQ();
    ECPoint compressed = compressPoint(uncompressed);
    pub = compressed.getEncoded();

    creationTimeSeconds = Utils.currentTimeMillis() / 1000;
}

From source file:com.licel.jcardsim.crypto.KeyPairImpl.java

License:Apache License

/**
 * Init key pair generation engine/*from www .ja  v a 2s .  c  om*/
 */
private void initEngine() {
    // only public key params, see specification
    if (publicKey != null) {
        keyGenerationParameters = ((KeyImpl) publicKey).getKeyGenerationParameters(rnd);
    }
    switch (algorithm) {
    case KeyPair.ALG_RSA:
    case KeyPair.ALG_RSA_CRT:
        if (keyGenerationParameters == null) {
            keyGenerationParameters = RSAKeyImpl.getDefaultKeyGenerationParameters(keyLength, rnd);
        }
        engine = new RSAKeyPairGenerator();
        break;
    //
    case KeyPair.ALG_DSA:
        if (keyLength < 512 || keyLength > 1024 || keyLength % 64 != 0) {
            CryptoException.throwIt(CryptoException.ILLEGAL_VALUE);
        }
        if (keyGenerationParameters == null) {
            keyGenerationParameters = DSAKeyImpl.getDefaultKeyGenerationParameters(keyLength, rnd);
        }
        engine = new DSAKeyPairGenerator();
        break;

    // ecc
    case KeyPair.ALG_EC_F2M:
    case KeyPair.ALG_EC_FP:
        if (keyGenerationParameters == null) {
            keyGenerationParameters = ECKeyImpl.getDefaultKeyGenerationParameters(algorithm, keyLength, rnd);
        }
        engine = new ECKeyPairGenerator();
        break;

    default:
        CryptoException.throwIt(CryptoException.NO_SUCH_ALGORITHM);
        break;
    }
    engine.init(keyGenerationParameters);

}

From source file:common.crypto.bouncycastle.CEccKeyGeneratorBC.java

License:Open Source License

@Override
public void initialize(IX9ECParameters curveSpec) throws Exception {

    ECDomainParameters domainParams = new ECDomainParameters(
            (ECCurve.Fp) ((IAdapter) curveSpec.getCurveFP()).getObject(),
            (ECPoint.Fp) ((IAdapter) curveSpec.getG()).getObject(), curveSpec.getN());
    m_keyGen = null;/*  ww  w  .  j  ava2  s . c  o m*/
    m_keyGen = new ECKeyPairGenerator();
    m_keyGen.init(new ECKeyGenerationParameters(domainParams, new SecureRandom()));

}

From source file:COSE.OneKey.java

static private OneKey generateECDSAKey(String curveName, CBORObject curve) {
    X9ECParameters p = NISTNamedCurves.getByName(curveName);

    ECDomainParameters parameters = new ECDomainParameters(p.getCurve(), p.getG(), p.getN(), p.getH());
    ECKeyPairGenerator pGen = new ECKeyPairGenerator();
    ECKeyGenerationParameters genParam = new ECKeyGenerationParameters(parameters, null);
    pGen.init(genParam);//ww w  .j  a  va  2  s  . com

    AsymmetricCipherKeyPair p1 = pGen.generateKeyPair();

    ECPublicKeyParameters keyPublic = (ECPublicKeyParameters) p1.getPublic();
    ECPrivateKeyParameters keyPrivate = (ECPrivateKeyParameters) p1.getPrivate();

    byte[] rgbX = keyPublic.getQ().normalize().getXCoord().getEncoded();
    byte[] rgbY = keyPublic.getQ().normalize().getYCoord().getEncoded();
    boolean signY = true;
    byte[] rgbD = keyPrivate.getD().toByteArray();

    OneKey key = new OneKey();

    key.add(KeyKeys.KeyType, KeyKeys.KeyType_EC2);
    key.add(KeyKeys.EC2_Curve, curve);
    key.add(KeyKeys.EC2_X, CBORObject.FromObject(rgbX));
    key.add(KeyKeys.EC2_Y, CBORObject.FromObject(rgbY));
    key.add(KeyKeys.EC2_D, CBORObject.FromObject(rgbD));

    return key;
}

From source file:COSE.Recipient.java

private void ECDH_GenerateEphemeral() throws CoseException {
    X9ECParameters p = privateKey.GetCurve();
    ECDomainParameters parameters = new ECDomainParameters(p.getCurve(), p.getG(), p.getN(), p.getH());

    ECKeyPairGenerator pGen = new ECKeyPairGenerator();
    ECKeyGenerationParameters genParam = new ECKeyGenerationParameters(parameters, null);
    pGen.init(genParam);//w  w  w .j a v  a  2s.  co m

    AsymmetricCipherKeyPair p1 = pGen.generateKeyPair();

    CBORObject epk = CBORObject.NewMap();
    epk.Add(KeyKeys.KeyType.AsCBOR(), KeyKeys.KeyType_EC2);
    epk.Add(KeyKeys.EC2_Curve.AsCBOR(), privateKey.get(KeyKeys.EC2_Curve.AsCBOR()));
    ECPublicKeyParameters priv = (ECPublicKeyParameters) p1.getPublic();

    byte[] rgbEncoded = priv.getQ().normalize().getEncoded(true);
    byte[] X = new byte[rgbEncoded.length - 1];
    System.arraycopy(rgbEncoded, 1, X, 0, X.length);
    epk.Add(KeyKeys.EC2_X.AsCBOR(), CBORObject.FromObject(X));
    epk.Add(KeyKeys.EC2_Y.AsCBOR(), CBORObject.FromObject((rgbEncoded[0] & 1) == 1));
    addAttribute(HeaderKeys.ECDH_EPK, epk, Attribute.UNPROTECTED);

    OneKey secretKey = new OneKey();
    secretKey.add(KeyKeys.KeyType, KeyKeys.KeyType_EC2);
    secretKey.add(KeyKeys.EC2_Curve, privateKey.get(KeyKeys.EC2_Curve.AsCBOR()));
    secretKey.add(KeyKeys.EC2_X, CBORObject.FromObject(X));
    secretKey.add(KeyKeys.EC2_Y, CBORObject.FromObject((rgbEncoded[0] & 1) == 1));
    ECPrivateKeyParameters priv1 = (ECPrivateKeyParameters) p1.getPrivate();
    secretKey.add(KeyKeys.EC2_D, CBORObject.FromObject(BigIntegers.asUnsignedByteArray(priv1.getD())));

    senderKey = secretKey;
}

From source file:COSE.Sign1MessageTest.java

@BeforeClass
public static void setUpClass() throws CoseException {

    X9ECParameters p = NISTNamedCurves.getByName("P-256");

    ECDomainParameters parameters = new ECDomainParameters(p.getCurve(), p.getG(), p.getN(), p.getH());
    ECKeyPairGenerator pGen = new ECKeyPairGenerator();
    ECKeyGenerationParameters genParam = new ECKeyGenerationParameters(parameters, null);
    pGen.init(genParam);//  w  w w.  ja v  a2s  . c  o  m

    AsymmetricCipherKeyPair p1 = pGen.generateKeyPair();

    keyPublic = (ECPublicKeyParameters) p1.getPublic();
    keyPrivate = (ECPrivateKeyParameters) p1.getPrivate();

    byte[] rgbX = keyPublic.getQ().normalize().getXCoord().getEncoded();
    byte[] rgbY = keyPublic.getQ().normalize().getYCoord().getEncoded();
    boolean signY = true;
    byte[] rgbD = keyPrivate.getD().toByteArray();

    CBORObject key = CBORObject.NewMap();
    key.Add(KeyKeys.KeyType.AsCBOR(), KeyKeys.KeyType_EC2);
    key.Add(KeyKeys.EC2_Curve.AsCBOR(), KeyKeys.EC2_P256);
    key.Add(KeyKeys.EC2_X.AsCBOR(), rgbX);
    key.Add(KeyKeys.EC2_Y.AsCBOR(), rgbY);
    cnKeyPublic = new OneKey(key);

    key = CBORObject.NewMap();
    key.Add(KeyKeys.KeyType.AsCBOR(), KeyKeys.KeyType_EC2);
    key.Add(KeyKeys.EC2_Curve.AsCBOR(), KeyKeys.EC2_P256);
    key.Add(KeyKeys.EC2_X.AsCBOR(), rgbX);
    key.Add(KeyKeys.EC2_Y.AsCBOR(), rgbY);
    cnKeyPublicCompressed = new OneKey(key);

    key = CBORObject.NewMap();
    key.Add(KeyKeys.KeyType.AsCBOR(), KeyKeys.KeyType_EC2);
    key.Add(KeyKeys.EC2_Curve.AsCBOR(), KeyKeys.EC2_P256);
    key.Add(KeyKeys.EC2_D.AsCBOR(), rgbD);
    cnKeyPrivate = new OneKey(key);
}