本文整理汇总了Java中java.security.spec.ECParameterSpec.getCofactor方法的典型用法代码示例。如果您正苦于以下问题：Java ECParameterSpec.getCofactor方法的具体用法？Java ECParameterSpec.getCofactor怎么用？Java ECParameterSpec.getCofactor使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类java.security.spec.ECParameterSpec的用法示例。
在下文中一共展示了ECParameterSpec.getCofactor方法的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: mapNonceGMWithECDH
import java.security.spec.ECParameterSpec; //导入方法依赖的package包/类
private static ECParameterSpec mapNonceGMWithECDH(final BigInteger nonceS,
final ECPoint sharedSecretPointH,
final ECParameterSpec params) {
// D~ = (p, a, b, G~, n, h) where G~ = [s]G + H
final ECPoint generator = params.getGenerator();
final EllipticCurve curve = params.getCurve();
final BigInteger a = curve.getA();
final BigInteger b = curve.getB();
final ECFieldFp field = (ECFieldFp)curve.getField();
final BigInteger p = field.getP();
final BigInteger order = params.getOrder();
final int cofactor = params.getCofactor();
final ECPoint ephemeralGenerator = add(multiply(nonceS, generator, params), sharedSecretPointH, params);
if (!toBouncyCastleECPoint(ephemeralGenerator, params).isValid()) {
LOGGER.warning("Se ha generado un punto invalido"); //$NON-NLS-1$
}
return new ECParameterSpec(new EllipticCurve(new ECFieldFp(p), a, b), ephemeralGenerator, order, cofactor);
}
示例2: mapNonceGMWithECDH
import java.security.spec.ECParameterSpec; //导入方法依赖的package包/类
private static ECParameterSpec mapNonceGMWithECDH(final BigInteger nonceS,
final ECPoint sharedSecretPointH,
final ECParameterSpec params) {
// D~ = (p, a, b, G~, n, h) where G~ = [s]G + H
final ECPoint generator = params.getGenerator();
final EllipticCurve curve = params.getCurve();
final BigInteger a = curve.getA();
final BigInteger b = curve.getB();
final ECFieldFp field = (ECFieldFp)curve.getField();
final BigInteger p = field.getP();
final BigInteger order = params.getOrder();
final int cofactor = params.getCofactor();
final ECPoint ephemeralGenerator = add(multiply(nonceS, generator, params), sharedSecretPointH, params);
if (!toSpongyCastleECPoint(ephemeralGenerator, params).isValid()) {
LOGGER.warning("Se ha generado un punto invalido"); //$NON-NLS-1$
}
return new ECParameterSpec(new EllipticCurve(new ECFieldFp(p), a, b), ephemeralGenerator, order, cofactor);
}
示例3: matchCurve
import java.security.spec.ECParameterSpec; //导入方法依赖的package包/类
private static boolean matchCurve(ECParameterSpec params, Curve curve) {
int fieldSize = params.getCurve().getField().getFieldSize();
if (curve.getCurve().getField().getFieldSize() == fieldSize
&& curve.getCurve().equals(params.getCurve())
&& curve.getGenerator().equals(params.getGenerator())
&& curve.getOrder().equals(params.getOrder())
&& curve.getCofactor() == params.getCofactor()) {
return true;
} else {
return false;
}
}
示例4: toBouncyCastleECCurve
import java.security.spec.ECParameterSpec; //导入方法依赖的package包/类
private static ECCurve toBouncyCastleECCurve(final ECParameterSpec params) {
final EllipticCurve curve = params.getCurve();
final ECField field = curve.getField();
if (!(field instanceof ECFieldFp)) {
throw new IllegalArgumentException(
"Solo se soporta 'ECFieldFp' y se proporciono " + field.getClass().getCanonicalName() //$NON-NLS-1$
);
}
final int coFactor = params.getCofactor();
final BigInteger order = params.getOrder();
final BigInteger a = curve.getA();
final BigInteger b = curve.getB();
final BigInteger p = getPrime(params);
return new ECCurve.Fp(p, a, b, order, BigInteger.valueOf(coFactor));
}
示例5: toSpongyCastleECCurve
import java.security.spec.ECParameterSpec; //导入方法依赖的package包/类
private static ECCurve toSpongyCastleECCurve(final ECParameterSpec params) {
final EllipticCurve curve = params.getCurve();
final ECField field = curve.getField();
if (!(field instanceof ECFieldFp)) {
throw new IllegalArgumentException(
"Solo se soporta 'ECFieldFp' y se proporciono " + field.getClass().getCanonicalName() //$NON-NLS-1$
);
}
final int coFactor = params.getCofactor();
final BigInteger order = params.getOrder();
final BigInteger a = curve.getA();
final BigInteger b = curve.getB();
final BigInteger p = getPrime(params);
return new ECCurve.Fp(p, a, b, order, BigInteger.valueOf(coFactor));
}