Examples with ECPoint java.security.spec.ECPoint used on opensource projects

Example 36 with ECPoint

use of java.security.spec.ECPoint in project robovm by robovm.

the class OpenSSLECGroupContext method getInstance.

public static OpenSSLECGroupContext getInstance(ECParameterSpec params) throws InvalidAlgorithmParameterException {
    final String curveName = params.getCurveName();
    if (curveName != null) {
        return OpenSSLECGroupContext.getCurveByName(curveName);
    }
    final EllipticCurve curve = params.getCurve();
    final ECField field = curve.getField();
    final int type;
    final BigInteger p;
    if (field instanceof ECFieldFp) {
        type = NativeCrypto.EC_CURVE_GFP;
        p = ((ECFieldFp) field).getP();
    } else if (field instanceof ECFieldF2m) {
        type = NativeCrypto.EC_CURVE_GF2M;
        p = ((ECFieldF2m) field).getReductionPolynomial();
    } else {
        throw new InvalidParameterException("unhandled field class " + field.getClass().getName());
    }
    final ECPoint generator = params.getGenerator();
    return OpenSSLECGroupContext.getInstance(type, p, curve.getA(), curve.getB(), generator.getAffineX(), generator.getAffineY(), params.getOrder(), BigInteger.valueOf(params.getCofactor()));
}

Example 37 with ECPoint

use of java.security.spec.ECPoint in project robovm by robovm.

the class OpenSSLECGroupContext method getECParameterSpec.

public ECParameterSpec getECParameterSpec() {
    final String curveName = NativeCrypto.EC_GROUP_get_curve_name(groupCtx);
    final byte[][] curveParams = NativeCrypto.EC_GROUP_get_curve(groupCtx);
    final BigInteger p = new BigInteger(curveParams[0]);
    final BigInteger a = new BigInteger(curveParams[1]);
    final BigInteger b = new BigInteger(curveParams[2]);
    final ECField field;
    final int type = NativeCrypto.get_EC_GROUP_type(groupCtx);
    if (type == NativeCrypto.EC_CURVE_GFP) {
        field = new ECFieldFp(p);
    } else if (type == NativeCrypto.EC_CURVE_GF2M) {
        field = new ECFieldF2m(p.bitLength() - 1, p);
    } else {
        throw new RuntimeException("unknown curve type " + type);
    }
    final EllipticCurve curve = new EllipticCurve(field, a, b);
    final OpenSSLECPointContext generatorCtx = new OpenSSLECPointContext(this, NativeCrypto.EC_GROUP_get_generator(groupCtx));
    final ECPoint generator = generatorCtx.getECPoint();
    final BigInteger order = new BigInteger(NativeCrypto.EC_GROUP_get_order(groupCtx));
    final BigInteger cofactor = new BigInteger(NativeCrypto.EC_GROUP_get_cofactor(groupCtx));
    return new ECParameterSpec(curve, generator, order, cofactor.intValue(), curveName);
}

Example 38 with ECPoint

use of java.security.spec.ECPoint in project robovm by robovm.

the class OpenSSLECPointContext method getECPoint.

public ECPoint getECPoint() {
    final byte[][] generatorCoords = NativeCrypto.EC_POINT_get_affine_coordinates(group.getContext(), pointCtx);
    final BigInteger x = new BigInteger(generatorCoords[0]);
    final BigInteger y = new BigInteger(generatorCoords[1]);
    return new ECPoint(x, y);
}

Example 39 with ECPoint

use of java.security.spec.ECPoint in project cxf by apache.

the class CryptoUtils method getECPublicKey.

public static ECPublicKey getECPublicKey(String curve, byte[] xPoint, byte[] yPoint) {
    try {
        ECParameterSpec params = getECParameterSpec(curve, false);
        ECPoint ecPoint = new ECPoint(toBigInteger(xPoint), toBigInteger(yPoint));
        ECPublicKeySpec keySpec = new ECPublicKeySpec(ecPoint, params);
        KeyFactory kf = KeyFactory.getInstance("EC");
        return (ECPublicKey) kf.generatePublic(keySpec);
    } catch (Exception ex) {
        throw new SecurityException(ex);
    }
}