Java ECFieldElement.add方法代码示例

本文整理汇总了Java中org.bouncycastle.math.ec.ECFieldElement.add方法的典型用法代码示例。如果您正苦于以下问题：Java ECFieldElement.add方法的具体用法？Java ECFieldElement.add怎么用？Java ECFieldElement.add使用的例子？那么, 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org.bouncycastle.math.ec.ECFieldElement的用法示例。

在下文中一共展示了ECFieldElement.add方法的10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: calculateTrace

import org.bouncycastle.math.ec.ECFieldElement; //导入方法依赖的package包/类
private static int calculateTrace(ECFieldElement fe)
{
    int m = fe.getFieldSize();
    ECFieldElement tr = fe;
    for (int i = 1; i < m; ++i)
    {
        fe = fe.square();
        tr = tr.add(fe);
    }
    BigInteger b = tr.toBigInteger();
    if (b.bitLength() > 1)
    {
        throw new IllegalStateException();
    }
    return b.intValue();
}

开发者ID:thedrummeraki，项目名称:Aki-SSL，代码行数:17，代码来源:TraceOptimizer.java

示例2: solveQuadradicEquation

import org.bouncycastle.math.ec.ECFieldElement; //导入方法依赖的package包/类
/**
 * Solves a quadratic equation <code>z<sup>2</sup> + z = beta</code>(X9.62
 * D.1.6) The other solution is <code>z + 1</code>.
 *
 * @param beta The value to solve the qradratic equation for.
 * @return the solution for <code>z<sup>2</sup> + z = beta</code> or
 *         <code>null</code> if no solution exists.
 */
private static ECFieldElement solveQuadradicEquation(ECFieldElement beta)
{
    ECFieldElement.F2m b = (ECFieldElement.F2m)beta;
    ECFieldElement zeroElement = new ECFieldElement.F2m(
        b.getM(), b.getK1(), b.getK2(), b.getK3(), ECConstants.ZERO);

    if (beta.toBigInteger().equals(ECConstants.ZERO))
    {
        return zeroElement;
    }

    ECFieldElement z = null;
    ECFieldElement gamma = zeroElement;

    Random rand = new Random();
    int m = b.getM();
    do
    {
        ECFieldElement t = new ECFieldElement.F2m(b.getM(), b.getK1(),
            b.getK2(), b.getK3(), new BigInteger(m, rand));
        z = zeroElement;
        ECFieldElement w = beta;
        for (int i = 1; i <= m - 1; i++)
        {
            ECFieldElement w2 = w.square();
            z = z.square().add(w2.multiply(t));
            w = w2.add(beta);
        }
        if (!w.toBigInteger().equals(ECConstants.ZERO))
        {
            return null;
        }
        gamma = z.square().add(z);
    }
    while (gamma.toBigInteger().equals(ECConstants.ZERO));

    return z;
}

开发者ID:Appdome，项目名称:ipack，代码行数:47，代码来源:DSTU4145PointEncoder.java

示例3: solveQuadraticEquation

import org.bouncycastle.math.ec.ECFieldElement; //导入方法依赖的package包/类
/**
 * Solves a quadratic equation <code>z<sup>2</sup> + z = beta</code>(X9.62
 * D.1.6) The other solution is <code>z + 1</code>.
 *
 * @param beta The value to solve the quadratic equation for.
 * @return the solution for <code>z<sup>2</sup> + z = beta</code> or
 *         <code>null</code> if no solution exists.
 */
private static ECFieldElement solveQuadraticEquation(ECCurve curve, ECFieldElement beta)
{
    if (beta.isZero())
    {
        return beta;
    }

    ECFieldElement zeroElement = curve.fromBigInteger(ECConstants.ZERO);

    ECFieldElement z = null;
    ECFieldElement gamma = null;

    Random rand = new Random();
    int m = beta.getFieldSize();
    do
    {
        ECFieldElement t = curve.fromBigInteger(new BigInteger(m, rand));
        z = zeroElement;
        ECFieldElement w = beta;
        for (int i = 1; i <= m - 1; i++)
        {
            ECFieldElement w2 = w.square();
            z = z.square().add(w2.multiply(t));
            w = w2.add(beta);
        }
        if (!w.isZero())
        {
            return null;
        }
        gamma = z.square().add(z);
    }
    while (gamma.isZero());

    return z;
}

开发者ID:ttt43ttt，项目名称:gwt-crypto，代码行数:44，代码来源:DSTU4145PointEncoder.java

示例4: decodePoint

import org.bouncycastle.math.ec.ECFieldElement; //导入方法依赖的package包/类
public static ECPoint decodePoint(ECCurve curve, byte[] bytes)
{
    /*byte[] bp_enc=new byte[bytes.length+1];
      if (0==(bytes[bytes.length-1]&0x1))
          bp_enc[0]=0x02;
      else
          bp_enc[0]=0x03;
      System.arraycopy(bytes, 0, bp_enc, 1, bytes.length);
      if (!trace(curve.fromBigInteger(new BigInteger(1, bytes))).equals(curve.getA().toBigInteger()))
          bp_enc[bp_enc.length-1]^=0x01;

      return curve.decodePoint(bp_enc);*/

    BigInteger k = BigInteger.valueOf(bytes[bytes.length - 1] & 0x1);
    if (!trace(curve.fromBigInteger(new BigInteger(1, bytes))).equals(curve.getA().toBigInteger()))
    {
        bytes = Arrays.clone(bytes);
        bytes[bytes.length - 1] ^= 0x01;
    }
    ECCurve.F2m c = (ECCurve.F2m)curve;
    ECFieldElement xp = curve.fromBigInteger(new BigInteger(1, bytes));
    ECFieldElement yp = null;
    if (xp.toBigInteger().equals(ECConstants.ZERO))
    {
        yp = (ECFieldElement.F2m)curve.getB();
        for (int i = 0; i < c.getM() - 1; i++)
        {
            yp = yp.square();
        }
    }
    else
    {
        ECFieldElement beta = xp.add(curve.getA()).add(
            curve.getB().multiply(xp.square().invert()));
        ECFieldElement z = solveQuadradicEquation(beta);
        if (z == null)
        {
            throw new RuntimeException("Invalid point compression");
        }
        if (!trace(z).equals(k))
        {
            z = z.add(curve.fromBigInteger(ECConstants.ONE));
        }
        yp = xp.multiply(z);
    }

    return new ECPoint.F2m(curve, xp, yp);
}

开发者ID:Appdome，项目名称:ipack，代码行数:49，代码来源:DSTU4145PointEncoder.java

示例5: twicePlus

import org.bouncycastle.math.ec.ECFieldElement; //导入方法依赖的package包/类
public ECPoint twicePlus(ECPoint b)
    {
        if (this.isInfinity())
        {
            return b;
        }
        if (b.isInfinity())
        {
            return twice();
        }

        ECCurve curve = this.getCurve();

        ECFieldElement X1 = this.x;
        if (X1.isZero())
        {
            // A point with X == 0 is it's own additive inverse
            return b;
        }

        // NOTE: twicePlus() only optimized for lambda-affine argument
        ECFieldElement X2 = b.getRawXCoord(), Z2 = b.getZCoord(0);
        if (X2.isZero() || !Z2.isOne())
        {
            return twice().add(b);
        }

        ECFieldElement L1 = this.y, Z1 = this.zs[0];
        ECFieldElement L2 = b.getRawYCoord();

        ECFieldElement X1Sq = X1.square();
        ECFieldElement L1Sq = L1.square();
        ECFieldElement Z1Sq = Z1.square();
        ECFieldElement L1Z1 = L1.multiply(Z1);

//        ECFieldElement T = curve.getA().multiply(Z1Sq).add(L1Sq).add(L1Z1);
        ECFieldElement T = L1Sq.add(L1Z1);
        ECFieldElement L2plus1 = L2.addOne();
//        ECFieldElement A = curve.getA().add(L2plus1).multiply(Z1Sq).add(L1Sq).multiplyPlusProduct(T, X1Sq, Z1Sq);
        ECFieldElement A = L2plus1.multiply(Z1Sq).add(L1Sq).multiplyPlusProduct(T, X1Sq, Z1Sq);
        ECFieldElement X2Z1Sq = X2.multiply(Z1Sq);
        ECFieldElement B = X2Z1Sq.add(T).square();

        if (B.isZero())
        {
            if (A.isZero())
            {
                return b.twice();
            }

            return curve.getInfinity();
        }

        if (A.isZero())
        {
//            return new SecT283K1Point(curve, A, curve.getB().sqrt(), withCompression);
            return new SecT283K1Point(curve, A, curve.getB(), withCompression);
        }

        ECFieldElement X3 = A.square().multiply(X2Z1Sq);
        ECFieldElement Z3 = A.multiply(B).multiply(Z1Sq);
        ECFieldElement L3 = A.add(B).square().multiplyPlusProduct(T, L2plus1, Z3);

        return new SecT283K1Point(curve, X3, L3, new ECFieldElement[]{ Z3 }, this.withCompression);
    }

开发者ID:ttt43ttt，项目名称:gwt-crypto，代码行数:66，代码来源:SecT283K1Point.java

示例6: twicePlus

import org.bouncycastle.math.ec.ECFieldElement; //导入方法依赖的package包/类
public ECPoint twicePlus(ECPoint b)
    {
        if (this.isInfinity())
        {
            return b;
        }
        if (b.isInfinity())
        {
            return twice();
        }

        ECCurve curve = this.getCurve();

        ECFieldElement X1 = this.x;
        if (X1.isZero())
        {
            // A point with X == 0 is it's own additive inverse
            return b;
        }

        // NOTE: twicePlus() only optimized for lambda-affine argument
        ECFieldElement X2 = b.getRawXCoord(), Z2 = b.getZCoord(0);
        if (X2.isZero() || !Z2.isOne())
        {
            return twice().add(b);
        }

        ECFieldElement L1 = this.y, Z1 = this.zs[0];
        ECFieldElement L2 = b.getRawYCoord();

        ECFieldElement X1Sq = X1.square();
        ECFieldElement L1Sq = L1.square();
        ECFieldElement Z1Sq = Z1.square();
        ECFieldElement L1Z1 = L1.multiply(Z1);

//        ECFieldElement T = curve.getA().multiply(Z1Sq).add(L1Sq).add(L1Z1);
        ECFieldElement T = L1Sq.add(L1Z1);
        ECFieldElement L2plus1 = L2.addOne();
//        ECFieldElement A = curve.getA().add(L2plus1).multiply(Z1Sq).add(L1Sq).multiplyPlusProduct(T, X1Sq, Z1Sq);
        ECFieldElement A = L2plus1.multiply(Z1Sq).add(L1Sq).multiplyPlusProduct(T, X1Sq, Z1Sq);
        ECFieldElement X2Z1Sq = X2.multiply(Z1Sq);
        ECFieldElement B = X2Z1Sq.add(T).square();

        if (B.isZero())
        {
            if (A.isZero())
            {
                return b.twice();
            }

            return curve.getInfinity();
        }

        if (A.isZero())
        {
//            return new SecT233K1Point(curve, A, curve.getB().sqrt(), withCompression);
            return new SecT233K1Point(curve, A, curve.getB(), withCompression);
        }

        ECFieldElement X3 = A.square().multiply(X2Z1Sq);
        ECFieldElement Z3 = A.multiply(B).multiply(Z1Sq);
        ECFieldElement L3 = A.add(B).square().multiplyPlusProduct(T, L2plus1, Z3);

        return new SecT233K1Point(curve, X3, L3, new ECFieldElement[]{ Z3 }, this.withCompression);
    }

开发者ID:ttt43ttt，项目名称:gwt-crypto，代码行数:66，代码来源:SecT233K1Point.java

示例7: twicePlus

import org.bouncycastle.math.ec.ECFieldElement; //导入方法依赖的package包/类
public ECPoint twicePlus(ECPoint b)
    {
        if (this.isInfinity())
        {
            return b;
        }
        if (b.isInfinity())
        {
            return twice();
        }

        ECCurve curve = this.getCurve();

        ECFieldElement X1 = this.x;
        if (X1.isZero())
        {
            // A point with X == 0 is it's own additive inverse
            return b;
        }

        // NOTE: twicePlus() only optimized for lambda-affine argument
        ECFieldElement X2 = b.getRawXCoord(), Z2 = b.getZCoord(0);
        if (X2.isZero() || !Z2.isOne())
        {
            return twice().add(b);
        }

        ECFieldElement L1 = this.y, Z1 = this.zs[0];
        ECFieldElement L2 = b.getRawYCoord();

        ECFieldElement X1Sq = X1.square();
        ECFieldElement L1Sq = L1.square();
        ECFieldElement Z1Sq = Z1.square();
        ECFieldElement L1Z1 = L1.multiply(Z1);

//        ECFieldElement T = curve.getA().multiply(Z1Sq).add(L1Sq).add(L1Z1);
        ECFieldElement T = L1Sq.add(L1Z1);
        ECFieldElement L2plus1 = L2.addOne();
//        ECFieldElement A = curve.getA().add(L2plus1).multiply(Z1Sq).add(L1Sq).multiplyPlusProduct(T, X1Sq, Z1Sq);
        ECFieldElement A = L2plus1.multiply(Z1Sq).add(L1Sq).multiplyPlusProduct(T, X1Sq, Z1Sq);
        ECFieldElement X2Z1Sq = X2.multiply(Z1Sq);
        ECFieldElement B = X2Z1Sq.add(T).square();

        if (B.isZero())
        {
            if (A.isZero())
            {
                return b.twice();
            }

            return curve.getInfinity();
        }

        if (A.isZero())
        {
//            return new SecT571K1Point(curve, A, curve.getB().sqrt(), withCompression);
            return new SecT571K1Point(curve, A, curve.getB(), withCompression);
        }

        ECFieldElement X3 = A.square().multiply(X2Z1Sq);
        ECFieldElement Z3 = A.multiply(B).multiply(Z1Sq);
        ECFieldElement L3 = A.add(B).square().multiplyPlusProduct(T, L2plus1, Z3);

        return new SecT571K1Point(curve, X3, L3, new ECFieldElement[]{ Z3 }, this.withCompression);
    }

开发者ID:ttt43ttt，项目名称:gwt-crypto，代码行数:66，代码来源:SecT571K1Point.java

示例8: two

import org.bouncycastle.math.ec.ECFieldElement; //导入方法依赖的package包/类
protected ECFieldElement two(ECFieldElement x)
{
    return x.add(x);
}

开发者ID:ttt43ttt，项目名称:gwt-crypto，代码行数:5，代码来源:SecP521R1Point.java

示例9: twicePlus

import org.bouncycastle.math.ec.ECFieldElement; //导入方法依赖的package包/类
public ECPoint twicePlus(ECPoint b)
    {
        if (this.isInfinity())
        {
            return b;
        }
        if (b.isInfinity())
        {
            return twice();
        }

        ECCurve curve = this.getCurve();

        ECFieldElement X1 = this.x;
        if (X1.isZero())
        {
            // A point with X == 0 is it's own additive inverse
            return b;
        }

        // NOTE: twicePlus() only optimized for lambda-affine argument
        ECFieldElement X2 = b.getRawXCoord(), Z2 = b.getZCoord(0);
        if (X2.isZero() || !Z2.isOne())
        {
            return twice().add(b);
        }

        ECFieldElement L1 = this.y, Z1 = this.zs[0];
        ECFieldElement L2 = b.getRawYCoord();

        ECFieldElement X1Sq = X1.square();
        ECFieldElement L1Sq = L1.square();
        ECFieldElement Z1Sq = Z1.square();
        ECFieldElement L1Z1 = L1.multiply(Z1);

//        ECFieldElement T = curve.getA().multiply(Z1Sq).add(L1Sq).add(L1Z1);
        ECFieldElement T = L1Sq.add(L1Z1);
        ECFieldElement L2plus1 = L2.addOne();
//        ECFieldElement A = curve.getA().add(L2plus1).multiply(Z1Sq).add(L1Sq).multiplyPlusProduct(T, X1Sq, Z1Sq);
        ECFieldElement A = L2plus1.multiply(Z1Sq).add(L1Sq).multiplyPlusProduct(T, X1Sq, Z1Sq);
        ECFieldElement X2Z1Sq = X2.multiply(Z1Sq);
        ECFieldElement B = X2Z1Sq.add(T).square();

        if (B.isZero())
        {
            if (A.isZero())
            {
                return b.twice();
            }

            return curve.getInfinity();
        }

        if (A.isZero())
        {
//            return new SecT239K1Point(curve, A, curve.getB().sqrt(), withCompression);
            return new SecT239K1Point(curve, A, curve.getB(), withCompression);
        }

        ECFieldElement X3 = A.square().multiply(X2Z1Sq);
        ECFieldElement Z3 = A.multiply(B).multiply(Z1Sq);
        ECFieldElement L3 = A.add(B).square().multiplyPlusProduct(T, L2plus1, Z3);

        return new SecT239K1Point(curve, X3, L3, new ECFieldElement[]{ Z3 }, this.withCompression);
    }

开发者ID:ttt43ttt，项目名称:gwt-crypto，代码行数:66，代码来源:SecT239K1Point.java

示例10: twicePlus

import org.bouncycastle.math.ec.ECFieldElement; //导入方法依赖的package包/类
public ECPoint twicePlus(ECPoint b)
    {
        if (this.isInfinity())
        {
            return b;
        }
        if (b.isInfinity())
        {
            return twice();
        }

        ECCurve curve = this.getCurve();

        ECFieldElement X1 = this.x;
        if (X1.isZero())
        {
            // A point with X == 0 is it's own additive inverse
            return b;
        }

        // NOTE: twicePlus() only optimized for lambda-affine argument
        ECFieldElement X2 = b.getRawXCoord(), Z2 = b.getZCoord(0);
        if (X2.isZero() || !Z2.isOne())
        {
            return twice().add(b);
        }

        ECFieldElement L1 = this.y, Z1 = this.zs[0];
        ECFieldElement L2 = b.getRawYCoord();

        ECFieldElement X1Sq = X1.square();
        ECFieldElement L1Sq = L1.square();
        ECFieldElement Z1Sq = Z1.square();
        ECFieldElement L1Z1 = L1.multiply(Z1);

//        ECFieldElement T = curve.getA().multiply(Z1Sq).add(L1Sq).add(L1Z1);
        ECFieldElement T = L1Sq.add(L1Z1);
        ECFieldElement L2plus1 = L2.addOne();
//        ECFieldElement A = curve.getA().add(L2plus1).multiply(Z1Sq).add(L1Sq).multiplyPlusProduct(T, X1Sq, Z1Sq);
        ECFieldElement A = L2plus1.multiply(Z1Sq).add(L1Sq).multiplyPlusProduct(T, X1Sq, Z1Sq);
        ECFieldElement X2Z1Sq = X2.multiply(Z1Sq);
        ECFieldElement B = X2Z1Sq.add(T).square();

        if (B.isZero())
        {
            if (A.isZero())
            {
                return b.twice();
            }

            return curve.getInfinity();
        }

        if (A.isZero())
        {
//            return new SecT409K1Point(curve, A, curve.getB().sqrt(), withCompression);
            return new SecT409K1Point(curve, A, curve.getB(), withCompression);
        }

        ECFieldElement X3 = A.square().multiply(X2Z1Sq);
        ECFieldElement Z3 = A.multiply(B).multiply(Z1Sq);
        ECFieldElement L3 = A.add(B).square().multiplyPlusProduct(T, L2plus1, Z3);

        return new SecT409K1Point(curve, X3, L3, new ECFieldElement[]{ Z3 }, this.withCompression);
    }

开发者ID:ttt43ttt，项目名称:gwt-crypto，代码行数:66，代码来源:SecT409K1Point.java

注：本文中的org.bouncycastle.math.ec.ECFieldElement.add方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。