Package org.apache.sshd.common.kex

Class DHG

java.lang.Object

org.apache.sshd.common.kex.AbstractDH

org.apache.sshd.common.kex.DHG

public class DHG
extends AbstractDH

Diffie-Hellman key generator.

Field Summary

Fields

Modifier and Type	Field	Description
private java.math.BigInteger	f
private Factory<? extends Digest>	factory
private java.math.BigInteger	g
static java.lang.String	KEX_TYPE
private java.math.BigInteger	p

Fields inherited from class org.apache.sshd.common.kex.AbstractDH

myKeyAgree

Constructor Summary

Constructors

Constructor	Description
DHG(Factory<? extends Digest> digestFactory)
DHG(Factory<? extends Digest> digestFactory, java.math.BigInteger pValue, java.math.BigInteger gValue)

Method Summary

Modifier and Type	Method	Description
protected byte[]	calculateE()	Lazy-called by AbstractDH.getE() if the public key data has not been generated yet.
protected byte[]	calculateK()	Lazy-called by AbstractDH.getK() if the shared secret data has not been calculated yet
java.math.BigInteger	getG()
Digest	getHash()
java.math.BigInteger	getP()
void	setF(byte[] f)
void	setF(java.math.BigInteger f)
void	setG(byte[] g)
void	setG(java.math.BigInteger g)
void	setP(byte[] p)
void	setP(java.math.BigInteger p)
java.lang.String	toString()

Methods inherited from class org.apache.sshd.common.kex.AbstractDH

checkKeyAgreementNecessity, getE, getK, getKeyEncapsulation, isPublicDataAvailable, isSharedSecretAvailable, putE, putF, stripLeadingZeroes

Methods inherited from class java.lang.Object

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

Field Detail

KEX_TYPE

public static final java.lang.String KEX_TYPE

See Also:

Constant Field Values

p

private java.math.BigInteger p

g

private java.math.BigInteger g

f

private java.math.BigInteger f

factory

private Factory<? extends Digest> factory

Constructor Detail

DHG

public DHG(Factory<? extends Digest> digestFactory)
    throws java.lang.Exception

Throws:

java.lang.Exception

DHG

public DHG(Factory<? extends Digest> digestFactory,
           java.math.BigInteger pValue,
           java.math.BigInteger gValue)
    throws java.lang.Exception

Throws:

java.lang.Exception

Method Detail

calculateE

protected byte[] calculateE()
                     throws java.lang.Exception

Description copied from class: AbstractDH

Lazy-called by AbstractDH.getE() if the public key data has not been generated yet.

Specified by:

calculateE in class AbstractDH

Returns:

The calculated public key data

Throws:

java.lang.Exception - If failed to generate the relevant data

calculateK

protected byte[] calculateK()
                     throws java.lang.Exception

Description copied from class: AbstractDH

Lazy-called by AbstractDH.getK() if the shared secret data has not been calculated yet

Specified by:

calculateK in class AbstractDH

Returns:

The shared secret data

Throws:

java.lang.Exception - If failed to calculate it

setP

public void setP(byte[] p)

setG

public void setG(byte[] g)

setF

public void setF(byte[] f)

Specified by:

setF in class AbstractDH

getP

public java.math.BigInteger getP()

setP

public void setP(java.math.BigInteger p)

getG

public java.math.BigInteger getG()

setG

public void setG(java.math.BigInteger g)

setF

public void setF(java.math.BigInteger f)

getHash

public Digest getHash()
               throws java.lang.Exception

Specified by:

getHash in class AbstractDH

Throws:

java.lang.Exception

toString

public java.lang.String toString()

Overrides:

toString in class AbstractDH