net.schmizz.sshj.transport.kex
Class AbstractDHG

java.lang.Object
  net.schmizz.sshj.transport.kex.AbstractDHG

All Implemented Interfaces:

KeyExchange

Direct Known Subclasses:

DHG1, DHG14

public abstract class AbstractDHG
extends Object
implements KeyExchange

Base class for DHG key exchange algorithms. Implementations will only have to configure the required data on the DH class in the

Constructor Summary

AbstractDHG()

Method Summary

byte[]	getH()
Digest	getHash() The message digest used by this key exchange algorithm.
PublicKey	getHostKey()
BigInteger	getK()
void	init(Transport trans, String V_S, String V_C, byte[] I_S, byte[] I_C) Initialize the key exchange algorithm.
protected abstract void	initDH(DH dh)
boolean	next(Message msg, SSHPacket packet) Process the next packet

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractDHG

public AbstractDHG()

Method Detail

getH

public byte[] getH()

Specified by:

getH in interface KeyExchange

Returns:

the computed H parameter

getK

public BigInteger getK()

Specified by:

getK in interface KeyExchange

Returns:

the computed K parameter

getHash

public Digest getHash()

Description copied from interface: KeyExchange

The message digest used by this key exchange algorithm.

Specified by:

getHash in interface KeyExchange

Returns:

the message digest

getHostKey

public PublicKey getHostKey()

Specified by:

getHostKey in interface KeyExchange

Returns:

the host key determined from server's response packets

init

public void init(Transport trans,
                 String V_S,
                 String V_C,
                 byte[] I_S,
                 byte[] I_C)
          throws GeneralSecurityException,
                 TransportException

Description copied from interface: KeyExchange

Initialize the key exchange algorithm.

Specified by:

init in interface KeyExchange

Parameters:

trans - the transport

V_S - the server identification string

V_C - the client identification string

I_S - the server key init packet

I_C - the client key init packet

Throws:

GeneralSecurityException

TransportException - if there is an error sending a packet

next

public boolean next(Message msg,
                    SSHPacket packet)
             throws GeneralSecurityException,
                    TransportException

Description copied from interface: KeyExchange

Process the next packet

Specified by:

next in interface KeyExchange

Parameters:

msg - message identifier

packet - the packet

Returns:

a boolean indicating if the processing is complete or if more packets are to be received

Throws:

GeneralSecurityException

TransportException - if there is an error sending a packet

initDH

protected abstract void initDH(DH dh)
                        throws GeneralSecurityException

Throws:

GeneralSecurityException