Package org.bouncycastle.jce.spec

Class ECParameterSpec

java.lang.Object

org.bouncycastle.jce.spec.ECParameterSpec

All Implemented Interfaces:

AlgorithmParameterSpec

Direct Known Subclasses:

ECNamedCurveParameterSpec

public class ECParameterSpec
extends Object
implements AlgorithmParameterSpec

basic domain parameters for an Elliptic Curve public or private key.

Constructor Summary

Constructors

Constructor	Description
ECParameterSpec(ECCurve curve, ECPoint G, BigInteger n)
ECParameterSpec(ECCurve curve, ECPoint G, BigInteger n, BigInteger h)
ECParameterSpec(ECCurve curve, ECPoint G, BigInteger n, BigInteger h, byte[] seed)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)	Compares this instance with the specified object and indicates if they are equal.
ECCurve	getCurve()	return the curve along which the base point lies.
ECPoint	getG()	return the base point we are using for these domain parameters.
BigInteger	getH()	return the cofactor H to the order of G.
BigInteger	getN()	return the order N of G
byte[]	getSeed()	return the seed used to generate this curve (if available).
int	hashCode()	Returns an integer hash code for this object.

Methods inherited from class java.lang.Object

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

Constructor Details

ECParameterSpec

public ECParameterSpec(ECCurve curve,
ECPoint G,
BigInteger n)

ECParameterSpec

public ECParameterSpec(ECCurve curve,
ECPoint G,
BigInteger n,
BigInteger h)

ECParameterSpec

public ECParameterSpec(ECCurve curve,
ECPoint G,
BigInteger n,
BigInteger h,
byte[] seed)

Method Details

getCurve

public ECCurve getCurve()

return the curve along which the base point lies.

Returns:

the curve

getG

public ECPoint getG()

return the base point we are using for these domain parameters.

Returns:

the base point.

getN

public BigInteger getN()

return the order N of G

Returns:

the order

getH

public BigInteger getH()

return the cofactor H to the order of G.

Returns:

the cofactor

getSeed

public byte[] getSeed()

return the seed used to generate this curve (if available).

Returns:

the random seed

equals

public boolean equals(Object o)

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:

o - 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)