org.spongycastle.math.ec

Class ECFieldElement.Fp

java.lang.Object

org.spongycastle.math.ec.ECFieldElement

org.spongycastle.math.ec.ECFieldElement.Fp

All Implemented Interfaces:

ECConstants

Enclosing class:

ECFieldElement

public static class ECFieldElement.Fp
extends ECFieldElement

Nested Class Summary

Nested classes/interfaces inherited from class org.spongycastle.math.ec.ECFieldElement

ECFieldElement.F2m, ECFieldElement.Fp

Field Summary

Fields inherited from interface org.spongycastle.math.ec.ECConstants

EIGHT, FOUR, ONE, THREE, TWO, ZERO

Constructor Summary

Constructors

Constructor and Description
Fp(java.math.BigInteger q, java.math.BigInteger x) Deprecated. Use ECCurve.fromBigInteger to construct field elements

Method Summary

Modifier and Type	Method and Description
ECFieldElement	add(ECFieldElement b)
ECFieldElement	addOne()
ECFieldElement	divide(ECFieldElement b)
boolean	equals(java.lang.Object other)
java.lang.String	getFieldName() return the field name for this field.
int	getFieldSize()
java.math.BigInteger	getQ()
int	hashCode()
ECFieldElement	invert()
protected java.math.BigInteger	modAdd(java.math.BigInteger x1, java.math.BigInteger x2)
protected java.math.BigInteger	modDouble(java.math.BigInteger x)
protected java.math.BigInteger	modHalf(java.math.BigInteger x)
protected java.math.BigInteger	modHalfAbs(java.math.BigInteger x)
protected java.math.BigInteger	modInverse(java.math.BigInteger x)
protected java.math.BigInteger	modMult(java.math.BigInteger x1, java.math.BigInteger x2)
protected java.math.BigInteger	modReduce(java.math.BigInteger x)
protected java.math.BigInteger	modSubtract(java.math.BigInteger x1, java.math.BigInteger x2)
ECFieldElement	multiply(ECFieldElement b)
ECFieldElement	multiplyMinusProduct(ECFieldElement b, ECFieldElement x, ECFieldElement y)
ECFieldElement	multiplyPlusProduct(ECFieldElement b, ECFieldElement x, ECFieldElement y)
ECFieldElement	negate()
ECFieldElement	sqrt() return a sqrt root - the routine verifies that the calculation returns the right value - if none exists it returns null.
ECFieldElement	square()
ECFieldElement	squareMinusProduct(ECFieldElement x, ECFieldElement y)
ECFieldElement	squarePlusProduct(ECFieldElement x, ECFieldElement y)
ECFieldElement	subtract(ECFieldElement b)
java.math.BigInteger	toBigInteger()

Methods inherited from class org.spongycastle.math.ec.ECFieldElement

bitLength, getEncoded, isOne, isZero, squarePow, testBitZero, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Fp

public Fp(java.math.BigInteger q,
          java.math.BigInteger x)

Deprecated. Use ECCurve.fromBigInteger to construct field elements

Method Detail

toBigInteger

public java.math.BigInteger toBigInteger()

Specified by:

toBigInteger in class ECFieldElement

getFieldName

public java.lang.String getFieldName()

return the field name for this field.

Specified by:

getFieldName in class ECFieldElement

Returns:

the string "Fp".

getFieldSize

public int getFieldSize()

Specified by:

getFieldSize in class ECFieldElement

getQ

public java.math.BigInteger getQ()

add

public ECFieldElement add(ECFieldElement b)

Specified by:

add in class ECFieldElement

addOne

public ECFieldElement addOne()

Specified by:

addOne in class ECFieldElement

subtract

public ECFieldElement subtract(ECFieldElement b)

Specified by:

subtract in class ECFieldElement

multiply

public ECFieldElement multiply(ECFieldElement b)

Specified by:

multiply in class ECFieldElement

multiplyMinusProduct

public ECFieldElement multiplyMinusProduct(ECFieldElement b,
                                           ECFieldElement x,
                                           ECFieldElement y)

Overrides:

multiplyMinusProduct in class ECFieldElement

multiplyPlusProduct

public ECFieldElement multiplyPlusProduct(ECFieldElement b,
                                          ECFieldElement x,
                                          ECFieldElement y)

Overrides:

multiplyPlusProduct in class ECFieldElement

divide

public ECFieldElement divide(ECFieldElement b)

Specified by:

divide in class ECFieldElement

negate

public ECFieldElement negate()

Specified by:

negate in class ECFieldElement

square

public ECFieldElement square()

Specified by:

square in class ECFieldElement

squareMinusProduct

public ECFieldElement squareMinusProduct(ECFieldElement x,
                                         ECFieldElement y)

Overrides:

squareMinusProduct in class ECFieldElement

squarePlusProduct

public ECFieldElement squarePlusProduct(ECFieldElement x,
                                        ECFieldElement y)

Overrides:

squarePlusProduct in class ECFieldElement

invert

public ECFieldElement invert()

Specified by:

invert in class ECFieldElement

sqrt

public ECFieldElement sqrt()

return a sqrt root - the routine verifies that the calculation returns the right value - if none exists it returns null.

Specified by:

sqrt in class ECFieldElement

modAdd

protected java.math.BigInteger modAdd(java.math.BigInteger x1,
                                      java.math.BigInteger x2)

modDouble

protected java.math.BigInteger modDouble(java.math.BigInteger x)

modHalf

protected java.math.BigInteger modHalf(java.math.BigInteger x)

modHalfAbs

protected java.math.BigInteger modHalfAbs(java.math.BigInteger x)

modInverse

protected java.math.BigInteger modInverse(java.math.BigInteger x)

modMult

protected java.math.BigInteger modMult(java.math.BigInteger x1,
                                       java.math.BigInteger x2)

modReduce

protected java.math.BigInteger modReduce(java.math.BigInteger x)

modSubtract

protected java.math.BigInteger modSubtract(java.math.BigInteger x1,
                                           java.math.BigInteger x2)

equals

public boolean equals(java.lang.Object other)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object