org.bouncycastle.math.ec.ECCurve.getCoordinateSystem()方法的使用及代码示例

x33g5p2x  于2022-01-19 转载在 其他  
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本文整理了Java中org.bouncycastle.math.ec.ECCurve.getCoordinateSystem()方法的一些代码示例，展示了ECCurve.getCoordinateSystem()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。ECCurve.getCoordinateSystem()方法的具体详情如下：
包路径：org.bouncycastle.math.ec.ECCurve
类名称：ECCurve
方法名：getCoordinateSystem

ECCurve.getCoordinateSystem介绍

暂无

代码示例

代码示例来源：origin: org.bouncycastle/bcprov-debug-jdk15on

protected int getCurveCoordinateSystem()
{
  // Cope with null curve, most commonly used by implicitlyCa
  return null == curve ? ECCurve.COORD_AFFINE : curve.getCoordinateSystem();
}

代码示例来源：origin: redfish64/TinyTravelTracker

protected int getCurveCoordinateSystem()
{
  // Cope with null curve, most commonly used by implicitlyCa
  return null == curve ? ECCurve.COORD_AFFINE : curve.getCoordinateSystem();
}

代码示例来源：origin: org.bouncycastle/bcprov-debug-jdk15on

protected static ECFieldElement[] getInitialZCoords(ECCurve curve)
{
  // Cope with null curve, most commonly used by implicitlyCa
  int coord = null == curve ? ECCurve.COORD_AFFINE : curve.getCoordinateSystem();
  switch (coord)
  {
  case ECCurve.COORD_AFFINE:
  case ECCurve.COORD_LAMBDA_AFFINE:
    return EMPTY_ZS;
  default:
    break;
  }
  ECFieldElement one = curve.fromBigInteger(ECConstants.ONE);
  switch (coord)
  {
  case ECCurve.COORD_HOMOGENEOUS:
  case ECCurve.COORD_JACOBIAN:
  case ECCurve.COORD_LAMBDA_PROJECTIVE:
    return new ECFieldElement[]{ one };
  case ECCurve.COORD_JACOBIAN_CHUDNOVSKY:
    return new ECFieldElement[]{ one, one, one };
  case ECCurve.COORD_JACOBIAN_MODIFIED:
    return new ECFieldElement[]{ one, curve.getA() };
  default:
    throw new IllegalArgumentException("unknown coordinate system");
  }
}

代码示例来源：origin: redfish64/TinyTravelTracker

protected static ECFieldElement[] getInitialZCoords(ECCurve curve)
{
  // Cope with null curve, most commonly used by implicitlyCa
  int coord = null == curve ? ECCurve.COORD_AFFINE : curve.getCoordinateSystem();
  switch (coord)
  {
  case ECCurve.COORD_AFFINE:
  case ECCurve.COORD_LAMBDA_AFFINE:
    return EMPTY_ZS;
  default:
    break;
  }
  ECFieldElement one = curve.fromBigInteger(ECConstants.ONE);
  switch (coord)
  {
  case ECCurve.COORD_HOMOGENEOUS:
  case ECCurve.COORD_JACOBIAN:
  case ECCurve.COORD_LAMBDA_PROJECTIVE:
    return new ECFieldElement[]{ one };
  case ECCurve.COORD_JACOBIAN_CHUDNOVSKY:
    return new ECFieldElement[]{ one, one, one };
  case ECCurve.COORD_JACOBIAN_MODIFIED:
    return new ECFieldElement[]{ one, curve.getA() };
  default:
    throw new IllegalArgumentException("unknown coordinate system");
  }
}

代码示例来源：origin: redfish64/TinyTravelTracker

protected ECCurve configureCurve(ECCurve c, int coord)
  {
    if (c.getCoordinateSystem() == coord)
    {
      return c;
    }

    if (!c.supportsCoordinateSystem(coord))
    {
      throw new IllegalArgumentException("Coordinate system " + coord + " not supported by this curve");
    }

    return c.configure().setCoordinateSystem(coord).create();
  }
}

代码示例来源：origin: org.bouncycastle/bcprov-debug-jdk15on

protected ECCurve configureCurve(ECCurve c, int coord)
  {
    if (c.getCoordinateSystem() == coord)
    {
      return c;
    }

    if (!c.supportsCoordinateSystem(coord))
    {
      throw new IllegalArgumentException("Coordinate system " + coord + " not supported by this curve");
    }

    return c.configure().setCoordinateSystem(coord).create();
  }
}

代码示例来源：origin: org.bouncycastle/bcprov-debug-jdk15on

public ECPoint negate()
{
  if (this.isInfinity())
  {
    return this;
  }
  ECCurve curve = this.getCurve();
  int coord = curve.getCoordinateSystem();
  if (ECCurve.COORD_AFFINE != coord)
  {
    return new ECPoint.Fp(curve, this.x, this.y.negate(), this.zs, this.withCompression);
  }
  return new ECPoint.Fp(curve, this.x, this.y.negate(), this.withCompression);
}

代码示例来源：origin: redfish64/TinyTravelTracker

public ECPoint negate()
{
  if (this.isInfinity())
  {
    return this;
  }
  ECCurve curve = this.getCurve();
  int coord = curve.getCoordinateSystem();
  if (ECCurve.COORD_AFFINE != coord)
  {
    return new ECPoint.Fp(curve, this.x, this.y.negate(), this.zs, this.withCompression);
  }
  return new ECPoint.Fp(curve, this.x, this.y.negate(), this.withCompression);
}

代码示例来源：origin: redfish64/TinyTravelTracker

switch (this.getCoordinateSystem())

代码示例来源：origin: org.bouncycastle/bcprov-debug-jdk15on

switch (this.getCoordinateSystem())

代码示例来源：origin: redfish64/TinyTravelTracker

public ECPoint.F2m tau()
{
  if (this.isInfinity())
  {
    return this;
  }
  ECCurve curve = this.getCurve();
  int coord = curve.getCoordinateSystem();
  ECFieldElement X1 = this.x;
  switch (coord)
  {
  case ECCurve.COORD_AFFINE:
  case ECCurve.COORD_LAMBDA_AFFINE:
  {
    ECFieldElement Y1 = this.y;
    return new ECPoint.F2m(curve, X1.square(), Y1.square(), this.withCompression);
  }
  case ECCurve.COORD_HOMOGENEOUS:
  case ECCurve.COORD_LAMBDA_PROJECTIVE:
  {
    ECFieldElement Y1 = this.y, Z1 = this.zs[0];
    return new ECPoint.F2m(curve, X1.square(), Y1.square(), new ECFieldElement[]{ Z1.square() }, this.withCompression);
  }
  default:
  {
    throw new IllegalStateException("unsupported coordinate system");
  }
  }
}

代码示例来源：origin: org.bouncycastle/bcprov-debug-jdk15on

public ECPoint.AbstractF2m tau()
{
  if (this.isInfinity())
  {
    return this;
  }
  ECCurve curve = this.getCurve();
  int coord = curve.getCoordinateSystem();
  ECFieldElement X1 = this.x;
  switch (coord)
  {
  case ECCurve.COORD_AFFINE:
  case ECCurve.COORD_LAMBDA_AFFINE:
  {
    ECFieldElement Y1 = this.y;
    return (ECPoint.AbstractF2m)curve.createRawPoint(X1.square(), Y1.square(), this.withCompression);
  }
  case ECCurve.COORD_HOMOGENEOUS:
  case ECCurve.COORD_LAMBDA_PROJECTIVE:
  {
    ECFieldElement Y1 = this.y, Z1 = this.zs[0];
    return (ECPoint.AbstractF2m)curve.createRawPoint(X1.square(), Y1.square(),
      new ECFieldElement[]{ Z1.square() }, this.withCompression);
  }
  default:
  {
    throw new IllegalStateException("unsupported coordinate system");
  }
  }
}

代码示例来源：origin: org.bouncycastle/bcprov-debug-jdk15on

int coord = curve.getCoordinateSystem();

代码示例来源：origin: redfish64/TinyTravelTracker

public ECPoint importPoint(ECPoint p)
{
  if (this != p.getCurve() && this.getCoordinateSystem() == COORD_JACOBIAN && !p.isInfinity())
  {
    switch (p.getCurve().getCoordinateSystem())
    {
    case COORD_JACOBIAN:
    case COORD_JACOBIAN_CHUDNOVSKY:
    case COORD_JACOBIAN_MODIFIED:
      return new ECPoint.Fp(this,
        fromBigInteger(p.x.toBigInteger()),
        fromBigInteger(p.y.toBigInteger()),
        new ECFieldElement[]{ fromBigInteger(p.zs[0].toBigInteger()) },
        p.withCompression);
    default:
      break;
    }
  }
  return super.importPoint(p);
}

代码示例来源：origin: org.bouncycastle/bcprov-debug-jdk15on

public ECPoint importPoint(ECPoint p)
{
  if (this != p.getCurve() && this.getCoordinateSystem() == ECCurve.COORD_JACOBIAN && !p.isInfinity())
  {
    switch (p.getCurve().getCoordinateSystem())
    {
    case ECCurve.COORD_JACOBIAN:
    case ECCurve.COORD_JACOBIAN_CHUDNOVSKY:
    case ECCurve.COORD_JACOBIAN_MODIFIED:
      return new ECPoint.Fp(this,
        fromBigInteger(p.x.toBigInteger()),
        fromBigInteger(p.y.toBigInteger()),
        new ECFieldElement[]{ fromBigInteger(p.zs[0].toBigInteger()) },
        p.withCompression);
    default:
      break;
    }
  }
  return super.importPoint(p);
}

代码示例来源：origin: org.bouncycastle/bcprov-debug-jdk15on

ECFieldElement X = this.x, A = curve.getA(), B = curve.getB();
int coord = curve.getCoordinateSystem();
if (coord == ECCurve.COORD_LAMBDA_PROJECTIVE)

代码示例来源：origin: org.bouncycastle/bcprov-debug-jdk15on

int coord = curve.getCoordinateSystem();

代码示例来源：origin: redfish64/TinyTravelTracker

int coord = curve.getCoordinateSystem();

代码示例来源：origin: redfish64/TinyTravelTracker

int coord = curve.getCoordinateSystem();

代码示例来源：origin: org.bouncycastle/bcprov-debug-jdk15on

int coord = curve.getCoordinateSystem();

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