Example usage for org.bouncycastle.crypto.params ECDomainParameters getG

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.params ECDomainParameters getG.

Prototype

public ECPoint getG() 

Source Link

Usage

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

License:Apache License

/**
 * Set/*  www.j a va  2 s  . c  o  m*/
 * <code>ECDomainParameters</code> for EC curve
 *
 * @param parameters
 * @see ECDomainParameters
 */
final void setDomainParameters(ECDomainParameters parameters) {
    a.setBigInteger(parameters.getCurve().getA().toBigInteger());
    b.setBigInteger(parameters.getCurve().getB().toBigInteger());
    // generator
    g.setBytes(parameters.getG().getEncoded());
    // order
    r.setBigInteger(parameters.getN());
    // cofactor
    setK(parameters.getH().shortValue());
    if (parameters.getCurve() instanceof ECCurve.Fp) {
        ECCurve.Fp ecfp = (ECCurve.Fp) parameters.getCurve();
        fp.setBigInteger(ecfp.getQ());
    } else {
        ECCurve.F2m ecf2m = (ECCurve.F2m) parameters.getCurve();
        setFieldF2M((short) ecf2m.getK1(), (short) ecf2m.getK2(), (short) ecf2m.getK3());
    }
}

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From source file:dorkbox.util.crypto.CryptoECC.java

License:Apache License

public static boolean compare(ECPrivateKeyParameters privateA, ECPrivateKeyParameters privateB) {
    ECDomainParameters parametersA = privateA.getParameters();
    ECDomainParameters parametersB = privateB.getParameters();

    // is it the same curve?
    boolean equals = parametersA.getCurve().equals(parametersB.getCurve());
    if (!equals) {
        return false;
    }/*from   ww  w  .  j  a  v a2s .  co m*/

    equals = parametersA.getG().equals(parametersB.getG());
    if (!equals) {
        return false;
    }

    equals = parametersA.getH().equals(parametersB.getH());
    if (!equals) {
        return false;
    }

    equals = parametersA.getN().equals(parametersB.getN());
    if (!equals) {
        return false;
    }

    equals = privateA.getD().equals(privateB.getD());

    return equals;
}

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From source file:dorkbox.util.crypto.CryptoECC.java

License:Apache License

/**
 * @return true if publicA and publicB are NOT NULL, and are both equal to eachother
 *///from   w  ww. jav a 2  s .com
@SuppressWarnings({ "RedundantIfStatement", "SpellCheckingInspection" })
public static boolean compare(ECPublicKeyParameters publicA, ECPublicKeyParameters publicB) {
    if (publicA == null || publicB == null) {
        return false;
    }

    ECDomainParameters parametersA = publicA.getParameters();
    ECDomainParameters parametersB = publicB.getParameters();

    // is it the same curve?
    boolean equals = parametersA.getCurve().equals(parametersB.getCurve());
    if (!equals) {
        return false;
    }

    equals = parametersA.getG().equals(parametersB.getG());
    if (!equals) {
        return false;
    }

    equals = parametersA.getH().equals(parametersB.getH());
    if (!equals) {
        return false;
    }

    equals = parametersA.getN().equals(parametersB.getN());
    if (!equals) {
        return false;
    }

    ECPoint normalizeA = publicA.getQ().normalize();
    ECPoint normalizeB = publicB.getQ().normalize();

    ECFieldElement xCoordA = normalizeA.getXCoord();
    ECFieldElement xCoordB = normalizeB.getXCoord();

    equals = xCoordA.equals(xCoordB);
    if (!equals) {
        return false;
    }

    ECFieldElement yCoordA = normalizeA.getYCoord();
    ECFieldElement yCoordB = normalizeB.getYCoord();

    equals = yCoordA.equals(yCoordB);
    if (!equals) {
        return false;
    }

    return true;
}

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From source file:dorkbox.util.serialization.EccPrivateKeySerializer.java

License:Apache License

public static void write(Output output, ECPrivateKeyParameters key) throws KryoException {
    byte[] bytes;
    int length;//from w w w  .  ja  v  a2  s.c  o m

    ECDomainParameters parameters = key.getParameters();
    ECCurve curve = parameters.getCurve();

    EccPrivateKeySerializer.serializeCurve(output, curve);

    /////////////
    BigInteger n = parameters.getN();
    ECPoint g = parameters.getG();

    /////////////
    bytes = n.toByteArray();
    length = bytes.length;
    output.writeInt(length, true);
    output.writeBytes(bytes, 0, length);

    serializeECPoint(g, output);

    /////////////
    bytes = key.getD().toByteArray();
    length = bytes.length;
    output.writeInt(length, true);
    output.writeBytes(bytes, 0, length);
}

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From source file:dorkbox.util.serialization.EccPublicKeySerializer.java

License:Apache License

public static void write(Output output, ECPublicKeyParameters key) throws KryoException {
    byte[] bytes;
    int length;//from  www .  j  a va 2  s.com

    ECDomainParameters parameters = key.getParameters();
    ECCurve curve = parameters.getCurve();

    EccPrivateKeySerializer.serializeCurve(output, curve);

    /////////////
    BigInteger n = parameters.getN();
    ECPoint g = parameters.getG();

    /////////////
    bytes = n.toByteArray();
    length = bytes.length;
    output.writeInt(length, true);
    output.writeBytes(bytes, 0, length);

    EccPrivateKeySerializer.serializeECPoint(g, output);
    EccPrivateKeySerializer.serializeECPoint(key.getQ(), output);
}

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From source file:org.cryptacular.adapter.AbstractWrappedECKey.java

License:Open Source License

/** @return  EC domain parameters. */
public ECParameterSpec getParams() {
    final ECDomainParameters params = delegate.getParameters();
    return new ECParameterSpec(EC5Util.convertCurve(params.getCurve(), params.getSeed()),
            new ECPoint(params.getG().normalize().getXCoord().toBigInteger(),
                    params.getG().normalize().getYCoord().toBigInteger()),
            params.getN(), params.getH().intValue());
}

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From source file:org.cryptoworkshop.ximix.client.verify.ECDecryptionChallengeVerifier.java

License:Apache License

private boolean isSameParameters(ECDomainParameters a, ECDomainParameters b) {
    return a.getCurve().equals(b.getCurve()) && a.getG().equals(b.getG()) && a.getH().equals(b.getH())
            && a.getN().equals(b.getN());
}

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From source file:org.cryptoworkshop.ximix.common.crypto.threshold.ECCommittedSecretShare.java

License:Apache License

/**
 * Return true if the share value is revealed by the commitment we carry, false otherwise.
 *
 * @param shareNumber the number of this share.
 * @param domainParams the domain parameters of the curve we expect to be on.
 * @param hValue the value of h used to commit against.
 * @return true if share is revealed by commitment, false otherwise.
 *///from  w w  w  . j  ava  2  s .  com
public boolean isRevealed(int shareNumber, ECDomainParameters domainParams, ECPoint hValue) {
    return getCommitment(shareNumber).equals(domainParams.getG().multiply(share).add(hValue.multiply(witness)));
}

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From source file:org.cryptoworkshop.ximix.demo.admin.Main.java

License:Apache License

private static ECPoint generatePoint(ECDomainParameters params, SecureRandom rand) {
    return params.getG().multiply(getRandomInteger(params.getN(), rand));
}

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From source file:org.cryptoworkshop.ximix.demo.ballot.Main.java

License:Apache License

private static ECPoint generatePoint(ECDomainParameters params, SecureRandom rand) {
    return params.getG().multiply(getRandomInteger(params.getN(), rand)).normalize();
}

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