org.bouncycastle.math.ec.custom.sec

Class SecP256K1FieldElement

java.lang.Object

org.bouncycastle.math.ec.ECFieldElement

org.bouncycastle.math.ec.custom.sec.SecP256K1FieldElement

All Implemented Interfaces:

ECConstants

public class SecP256K1FieldElement
extends ECFieldElement

Nested Class Summary

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

ECFieldElement.F2m, ECFieldElement.Fp

Field Summary

Fields

Modifier and Type	Field and Description
static BigInteger	Q
protected int[]	x

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

FOUR, ONE, THREE, TWO, ZERO

Constructor Summary

Constructors

Modifier	Constructor and Description
	SecP256K1FieldElement()
	SecP256K1FieldElement(BigInteger x)
protected	SecP256K1FieldElement(int[] x)

Method Summary

Modifier and Type	Method and Description
ECFieldElement	add(ECFieldElement b)
ECFieldElement	addOne()
ECFieldElement	divide(ECFieldElement b)
boolean	equals(Object other) Compares this instance with the specified object and indicates if they are equal.
String	getFieldName()
int	getFieldSize()
int	hashCode() Returns an integer hash code for this object.
ECFieldElement	invert()
boolean	isOne()
boolean	isZero()
ECFieldElement	multiply(ECFieldElement b)
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	subtract(ECFieldElement b)
boolean	testBitZero()
BigInteger	toBigInteger()

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

bitLength, getEncoded, multiplyMinusProduct, multiplyPlusProduct, squareMinusProduct, squarePlusProduct, toString

Methods inherited from class java.lang.Object

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

Field Detail

Q

public static final BigInteger Q

x

protected int[] x

Constructor Detail

SecP256K1FieldElement

public SecP256K1FieldElement(BigInteger x)

SecP256K1FieldElement

public SecP256K1FieldElement()

SecP256K1FieldElement

protected SecP256K1FieldElement(int[] x)

Method Detail

isZero

public boolean isZero()

Overrides:

isZero in class ECFieldElement

isOne

public boolean isOne()

Overrides:

isOne in class ECFieldElement

testBitZero

public boolean testBitZero()

Overrides:

testBitZero in class ECFieldElement

toBigInteger

public BigInteger toBigInteger()

Specified by:

toBigInteger in class ECFieldElement

getFieldName

public String getFieldName()

Specified by:

getFieldName in class ECFieldElement

getFieldSize

public int getFieldSize()

Specified by:

getFieldSize in class ECFieldElement

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

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

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

equals

public boolean equals(Object other)

Description copied from class: Object

Compares this instance with the specified object and indicates if they are equal. In order to be equal, o must represent the same object as this instance using a class-specific comparison. The general contract is that this comparison should be reflexive, symmetric, and transitive. Also, no object reference other than null is equal to null.

The default implementation returns true only if this == o. See Writing a correct equals method if you intend implementing your own equals method.

The general contract for the equals and Object.hashCode() methods is that if equals returns true for any two objects, then hashCode() must return the same value for these objects. This means that subclasses of Object usually override either both methods or neither of them.

Overrides:

equals in class Object

Parameters:

other - the object to compare this instance with.

Returns:

true if the specified object is equal to this Object; false otherwise.

See Also:

Object.hashCode()

hashCode

public int hashCode()

Description copied from class: Object

Returns an integer hash code for this object. By contract, any two objects for which Object.equals(java.lang.Object) returns true must return the same hash code value. This means that subclasses of Object usually override both methods or neither method.

Note that hash values must not change over time unless information used in equals comparisons also changes.

See Writing a correct hashCode method if you intend implementing your own hashCode method.

Overrides:

hashCode in class Object

Returns:

this object's hash code.

See Also:

Object.equals(java.lang.Object)