org.bouncycastle.crypto.asymmetric

Class ECDomainParameters

java.lang.Object

org.bouncycastle.crypto.asymmetric.ECDomainParameters

Direct Known Subclasses:

ECImplicitDomainParameters, NamedECDomainParameters

public class ECDomainParameters
extends java.lang.Object

Container class for Elliptic Curve domain parameters.

Constructor Summary

Constructors

Constructor and Description
ECDomainParameters(ECCurve curve, ECPoint G, java.math.BigInteger n) Constructor that assumes the co-factor h is 1.
ECDomainParameters(ECCurve curve, ECPoint G, java.math.BigInteger n, java.math.BigInteger h) Constructor with explicit co-factor.
ECDomainParameters(ECCurve curve, ECPoint G, java.math.BigInteger n, java.math.BigInteger h, byte[] seed) Constructor with explicit co-factor and generation seed.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o)
ECCurve	getCurve() Return the curve associated with these domain parameters.
ECPoint	getG() Return the base point associated with these domain parameters.
java.math.BigInteger	getH() Return the co-factor associated with these domain parameters.
java.math.BigInteger	getInverseH() Return the multiplicative inverse of H over the order N.
java.math.BigInteger	getN() Return the order associated with these domain parameters.
byte[]	getSeed() Return the generation seed associated with these domain parameters.
int	hashCode()

Methods inherited from class java.lang.Object

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

Constructor Detail

ECDomainParameters

public ECDomainParameters(ECCurve curve,
                          ECPoint G,
                          java.math.BigInteger n)

Constructor that assumes the co-factor h is 1.

Parameters:

curve - the curve for these domain parameters.

G - the base point G for the domain parameters.

n - the order for the domain parameters.

ECDomainParameters

public ECDomainParameters(ECCurve curve,
                          ECPoint G,
                          java.math.BigInteger n,
                          java.math.BigInteger h)

Constructor with explicit co-factor.

Parameters:

curve - the curve for these domain parameters.

G - the base point G for the domain parameters.

n - the order for the domain parameters.

h - the co-factor.

ECDomainParameters

public ECDomainParameters(ECCurve curve,
                          ECPoint G,
                          java.math.BigInteger n,
                          java.math.BigInteger h,
                          byte[] seed)

Constructor with explicit co-factor and generation seed.

Parameters:

curve - the curve for these domain parameters.

G - the base point G for the domain parameters.

n - the order for the domain parameters.

h - the co-factor.

seed - the seed value used to generate the domain parameters.

Method Detail

getCurve

public ECCurve getCurve()

Return the curve associated with these domain parameters.

Returns:

the domain parameters' curve.

getG

public ECPoint getG()

Return the base point associated with these domain parameters.

Returns:

the domain parameters' base point.

getN

public java.math.BigInteger getN()

Return the order associated with these domain parameters.

Returns:

the domain parameters' order.

getH

public java.math.BigInteger getH()

Return the co-factor associated with these domain parameters.

Returns:

the domain parameters' co-factor.

getInverseH

public java.math.BigInteger getInverseH()

Return the multiplicative inverse of H over the order N.

Returns:

inverse of H.

getSeed

public byte[] getSeed()

Return the generation seed associated with these domain parameters.

Returns:

the domain parameters' seed.

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object