Example usage for org.bouncycastle.math.ec ECPoint getYCoord

Introduction

In this page you can find the example usage for org.bouncycastle.math.ec ECPoint getYCoord.

Prototype

public ECFieldElement getYCoord() 

Source Link

Document

Returns the y-coordinate.

Usage

From source file:com.vvote.verifierlibrary.utils.crypto.ECUtils.java

License:Open Source License

/**
 * Convers a single ECPoint into a JSONObject. THe coordinates are stored in
 * Hex representations of their underlying BigInteger format
 * /*from   w  w  w.  j  a  v a2s  . c  o m*/
 * @param point
 * @return the JSONObject
 * @throws JSONException
 */
public static JSONObject constructJSONFromECPoint(ECPoint point) throws JSONException {
    JSONObject jpoint = new JSONObject();
    jpoint.put(CryptoConstants.EC.X, point.getXCoord().toBigInteger().toString(16));
    jpoint.put(CryptoConstants.EC.Y, point.getYCoord().toBigInteger().toString(16));

    return jpoint;
}

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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 w  w .  jav a2s.  c  o m
@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

static void serializeECPoint(ECPoint point, Output output) throws KryoException {
    if (point.isInfinity()) {
        return;/*from www  .  j  a v a  2 s.  co  m*/
    }

    ECPoint normed = point.normalize();

    byte[] X = normed.getXCoord().getEncoded();
    byte[] Y = normed.getYCoord().getEncoded();

    int length = 1 + X.length + Y.length;
    output.writeInt(length, true);

    output.write(0x04);
    output.write(X);
    output.write(Y);
}

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