Package org.bouncycastle.math.ec

Class ECPoint

java.lang.Object

org.bouncycastle.math.ec.ECPoint

Direct Known Subclasses:

ECPoint.F2m, ECPoint.Fp

public abstract class ECPoint
extends Object

base class for points on elliptic curves.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ECPoint.F2m	Elliptic curve points over F2m
static class	ECPoint.Fp	Elliptic curve points over Fp

Field Summary

Fields

Modifier and Type	Field	Description
protected org.bouncycastle.math.ec.ECMultiplier	multiplier
protected org.bouncycastle.math.ec.PreCompInfo	preCompInfo
protected boolean	withCompression

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ECPoint(ECCurve curve, ECFieldElement x, ECFieldElement y)

Method Summary

Modifier and Type	Method	Description
abstract ECPoint	add(ECPoint b)
boolean	equals(Object other)	Compares this instance with the specified object and indicates if they are equal.
ECCurve	getCurve()
byte[]	getEncoded()
abstract byte[]	getEncoded(boolean compressed)
ECFieldElement	getX()
ECFieldElement	getY()
int	hashCode()	Returns an integer hash code for this object.
boolean	isCompressed()
boolean	isInfinity()
ECPoint	multiply(BigInteger k)	Multiplies this ECPoint by the given number.
abstract ECPoint	negate()
abstract ECPoint	subtract(ECPoint b)
abstract ECPoint	twice()

Methods inherited from class java.lang.Object

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

Field Details

withCompression

protected boolean withCompression

multiplier

protected org.bouncycastle.math.ec.ECMultiplier multiplier

preCompInfo

protected org.bouncycastle.math.ec.PreCompInfo preCompInfo

Constructor Details

ECPoint

protected ECPoint(ECCurve curve,
ECFieldElement x,
ECFieldElement y)

Method Details

getCurve

public ECCurve getCurve()

getX

public ECFieldElement getX()

getY

public ECFieldElement getY()

isInfinity

public boolean isInfinity()

isCompressed

public boolean isCompressed()

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)

getEncoded

public byte[] getEncoded()

getEncoded

public abstract byte[] getEncoded(boolean compressed)

add

public abstract ECPoint add(ECPoint b)

subtract

public abstract ECPoint subtract(ECPoint b)

negate

public abstract ECPoint negate()

twice

public abstract ECPoint twice()

multiply

public ECPoint multiply(BigInteger k)

Multiplies this ECPoint by the given number.

Parameters:

k - The multiplicator.

Returns:

k * this.