Class Curve25519DH

java.lang.Object

net.schmizz.sshj.transport.kex.DHBase

net.schmizz.sshj.transport.kex.Curve25519DH

public class Curve25519DH
extends DHBase

Key Exchange Method using Curve25519 as defined in RFC 8731

Field Summary

Fields

Modifier and Type	Field	Description
private static final String	ALGORITHM
private byte[]	algorithmId
private int	algorithmIdLength
private int	encodedKeyLength
private static final int	KEY_LENGTH

Fields inherited from class DHBase

agreement, generator

Constructor Summary

Constructors

Constructor	Description
Curve25519DH()

Method Summary

Modifier and Type	Method	Description
(package private) void	computeK(byte[] peerPublicKey)	Compute Shared Secret Key using Diffie-Hellman Curve25519 known as X25519
private KeySpec	getPeerPublicKeySpec(byte[] peerPublicKey)
void	init(AlgorithmParameterSpec params, Factory<Random> randomFactory)	Initialize Key Agreement with generated Public and Private Key Pair
private void	setPublicKey(PublicKey publicKey)

Methods inherited from class DHBase

getE, getK, setE, setK

Methods inherited from class Object

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

Field Details

ALGORITHM

private static final String ALGORITHM

See Also:

• Constant Field Values

KEY_LENGTH

private static final int KEY_LENGTH

See Also:

• Constant Field Values

encodedKeyLength

private int encodedKeyLength

algorithmIdLength

private int algorithmIdLength

algorithmId

private byte[] algorithmId

Constructor Details

Curve25519DH

public Curve25519DH()

Method Details

computeK

void computeK(byte[] peerPublicKey)
       throws GeneralSecurityException

Compute Shared Secret Key using Diffie-Hellman Curve25519 known as X25519

Specified by:

computeK in class DHBase

Parameters:

peerPublicKey - Peer public key bytes

Throws:

GeneralSecurityException - Thrown on key agreement failures

init

public void init(AlgorithmParameterSpec params,
 Factory<Random> randomFactory)
          throws GeneralSecurityException

Initialize Key Agreement with generated Public and Private Key Pair

Specified by:

init in class DHBase

Parameters:

params - Parameters not used

randomFactory - Random Factory not used

Throws:

GeneralSecurityException - Thrown on key agreement initialization failures

setPublicKey

private void setPublicKey(PublicKey publicKey)

getPeerPublicKeySpec

private KeySpec getPeerPublicKeySpec(byte[] peerPublicKey)