Package org.apache.sshd.common.kex

Class ECDH

java.lang.Object

org.apache.sshd.common.kex.AbstractDH

org.apache.sshd.common.kex.ECDH

public class ECDH
extends AbstractDH

Elliptic Curve Diffie-Hellman key agreement.

Field Summary

Fields

Modifier and Type	Field	Description
private ECCurves	curve
private java.security.spec.ECPoint	f
static java.lang.String	KEX_TYPE
private java.security.spec.ECParameterSpec	params

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

myKeyAgree

Constructor Summary

Constructors

Constructor	Description
ECDH()
ECDH(java.lang.String curveName)
ECDH(java.security.spec.ECParameterSpec paramSpec)
ECDH(ECCurves curve)

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
Digest	getHash()
void	putE(Buffer buffer, byte[] e)
void	putF(Buffer buffer, byte[] f)
void	setCurveParameters(java.security.spec.ECParameterSpec paramSpec)
void	setF(byte[] f)
java.lang.String	toString()

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

checkKeyAgreementNecessity, getE, getK, isPublicDataAvailable, isSharedSecretAvailable, 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

curve

private ECCurves curve

params

private java.security.spec.ECParameterSpec params

f

private java.security.spec.ECPoint f

Constructor Detail

ECDH

public ECDH()
     throws java.lang.Exception

Throws:

java.lang.Exception

ECDH

public ECDH(java.lang.String curveName)
     throws java.lang.Exception

Throws:

java.lang.Exception

ECDH

public ECDH(ECCurves curve)
     throws java.lang.Exception

Throws:

java.lang.Exception

ECDH

public ECDH(java.security.spec.ECParameterSpec paramSpec)
     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

setCurveParameters

public void setCurveParameters(java.security.spec.ECParameterSpec paramSpec)

setF

public void setF(byte[] f)

Specified by:

setF in class AbstractDH

putE

public void putE(Buffer buffer,
                 byte[] e)

Overrides:

putE in class AbstractDH

putF

public void putF(Buffer buffer,
                 byte[] f)

Overrides:

putF in class AbstractDH

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