net.sf.mmm.crypto.asymmetric.access.ec.bc

Class CryptoEllipticCurveBc

java.lang.Object

net.sf.mmm.crypto.asymmetric.access.ec.bc.CryptoEllipticCurveBc

public abstract class CryptoEllipticCurveBc
extends Object

Configuration for a specific elliptic curve based on bouncy castles ECParameterSpec.

Since:

1.0.0

Field Summary

Fields

Modifier and Type	Field and Description
private String	curveName
private org.bouncycastle.jce.spec.ECParameterSpec	ecParameters
private BigInteger	halfN
private BigInteger	q

Constructor Summary

Constructors

Constructor and Description
CryptoEllipticCurveBc(String curveName) The constructor.

Method Summary

Modifier and Type	Method and Description
protected abstract BigInteger	determineCurveQ()
int	getBitLength()
int	getByteLength()
static int	getByteLength(org.bouncycastle.jce.spec.ECParameterSpec ecParameters)
String	getCurveName()
org.bouncycastle.jce.spec.ECParameterSpec	getEcParameters()
BigInteger	getHalfN()
BigInteger	getQ()

Methods inherited from class java.lang.Object

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

Field Detail

curveName

private final String curveName

ecParameters

private org.bouncycastle.jce.spec.ECParameterSpec ecParameters

q

private BigInteger q

halfN

private BigInteger halfN

Constructor Detail

CryptoEllipticCurveBc

CryptoEllipticCurveBc(String curveName)

The constructor.

Parameters:

curveName - the curve name.

Method Detail

getCurveName

public String getCurveName()

Returns:

the curve name.

getEcParameters

public org.bouncycastle.jce.spec.ECParameterSpec getEcParameters()

Returns:

the ECParameterSpec.

getQ

public BigInteger getQ()

Returns:

the Q value of the curve.

determineCurveQ

protected abstract BigInteger determineCurveQ()

Returns:

the Q value.

getHalfN

public BigInteger getHalfN()

Returns:

halfN

getBitLength

public int getBitLength()

Returns:

the length of the curve order and keys in bits.

getByteLength

public int getByteLength()

Returns:

the length of the curve order and keys in bytes.

getByteLength

public static int getByteLength(org.bouncycastle.jce.spec.ECParameterSpec ecParameters)

Parameters:

ecParameters - the ECParameterSpec.

Returns:

the length of the curve order in bytes. This is also the length of the (compressed) keys except for a potential extra byte.