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package org.bouncycastle.math.ec.custom.sec;
import java.math.BigInteger;
import org.bouncycastle.math.ec.ECFieldElement;
import org.bouncycastle.math.raw.Nat576;
import org.bouncycastle.util.Arrays;
public class SecT571FieldElement extends ECFieldElement.AbstractF2m
{
protected long[] x;
public SecT571FieldElement(BigInteger x)
{
if (x == null || x.signum() < 0 || x.bitLength() > 571)
{
throw new IllegalArgumentException("x value invalid for SecT571FieldElement");
}
this.x = SecT571Field.fromBigInteger(x);
}
public SecT571FieldElement()
{
this.x = Nat576.create64();
}
protected SecT571FieldElement(long[] x)
{
this.x = x;
}
// public int bitLength()
// {
// return x.degree();
// }
public boolean isOne()
{
return Nat576.isOne64(x);
}
public boolean isZero()
{
return Nat576.isZero64(x);
}
public boolean testBitZero()
{
return (x[0] & 1L) != 0L;
}
public BigInteger toBigInteger()
{
return Nat576.toBigInteger64(x);
}
public String getFieldName()
{
return "SecT571Field";
}
public int getFieldSize()
{
return 571;
}
public ECFieldElement add(ECFieldElement b)
{
long[] z = Nat576.create64();
SecT571Field.add(x, ((SecT571FieldElement)b).x, z);
return new SecT571FieldElement(z);
}
public ECFieldElement addOne()
{
long[] z = Nat576.create64();
SecT571Field.addOne(x, z);
return new SecT571FieldElement(z);
}
public ECFieldElement subtract(ECFieldElement b)
{
// Addition and subtraction are the same in F2m
return add(b);
}
public ECFieldElement multiply(ECFieldElement b)
{
long[] z = Nat576.create64();
SecT571Field.multiply(x, ((SecT571FieldElement)b).x, z);
return new SecT571FieldElement(z);
}
public ECFieldElement multiplyMinusProduct(ECFieldElement b, ECFieldElement x, ECFieldElement y)
{
return multiplyPlusProduct(b, x, y);
}
public ECFieldElement multiplyPlusProduct(ECFieldElement b, ECFieldElement x, ECFieldElement y)
{
long[] ax = this.x, bx = ((SecT571FieldElement)b).x;
long[] xx = ((SecT571FieldElement)x).x, yx = ((SecT571FieldElement)y).x;
long[] tt = Nat576.createExt64();
SecT571Field.multiplyAddToExt(ax, bx, tt);
SecT571Field.multiplyAddToExt(xx, yx, tt);
long[] z = Nat576.create64();
SecT571Field.reduce(tt, z);
return new SecT571FieldElement(z);
}
public ECFieldElement divide(ECFieldElement b)
{
return multiply(b.invert());
}
public ECFieldElement negate()
{
return this;
}
public ECFieldElement square()
{
long[] z = Nat576.create64();
SecT571Field.square(x, z);
return new SecT571FieldElement(z);
}
public ECFieldElement squareMinusProduct(ECFieldElement x, ECFieldElement y)
{
return squarePlusProduct(x, y);
}
public ECFieldElement squarePlusProduct(ECFieldElement x, ECFieldElement y)
{
long[] ax = this.x;
long[] xx = ((SecT571FieldElement)x).x, yx = ((SecT571FieldElement)y).x;
long[] tt = Nat576.createExt64();
SecT571Field.squareAddToExt(ax, tt);
SecT571Field.multiplyAddToExt(xx, yx, tt);
long[] z = Nat576.create64();
SecT571Field.reduce(tt, z);
return new SecT571FieldElement(z);
}
public ECFieldElement squarePow(int pow)
{
if (pow < 1)
{
return this;
}
long[] z = Nat576.create64();
SecT571Field.squareN(x, pow, z);
return new SecT571FieldElement(z);
}
public int trace()
{
return SecT571Field.trace(x);
}
public ECFieldElement invert()
{
long[] z = Nat576.create64();
SecT571Field.invert(x, z);
return new SecT571FieldElement(z);
}
public ECFieldElement sqrt()
{
long[] z = Nat576.create64();
SecT571Field.sqrt(x, z);
return new SecT571FieldElement(z);
}
public int getRepresentation()
{
return ECFieldElement.F2m.PPB;
}
public int getM()
{
return 571;
}
public int getK1()
{
return 2;
}
public int getK2()
{
return 5;
}
public int getK3()
{
return 10;
}
public boolean equals(Object other)
{
if (other == this)
{
return true;
}
if (!(other instanceof SecT571FieldElement))
{
return false;
}
SecT571FieldElement o = (SecT571FieldElement)other;
return Nat576.eq64(x, o.x);
}
public int hashCode()
{
return 5711052 ^ Arrays.hashCode(x, 0, 9);
}
}
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