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

Introduction

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

Prototype

public BigInteger getH() 

Source Link

Usage

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

License:Apache License

/**
 * Set/*www.  jav  a 2  s .  c  om*/
 * <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   www.  j a va2s .  c  om

    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
 *///  w  ww  . j a  v a2s. c om
@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: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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