com.maverick.ssh.components.jce
Class DiffieHellmanGroup1Sha1

java.lang.Object
  com.maverick.ssh.components.SshKeyExchangeClient
      com.maverick.ssh.components.jce.DiffieHellmanGroup1Sha1

All Implemented Interfaces:

AbstractKeyExchange, SshKeyExchange

public class DiffieHellmanGroup1Sha1

extends SshKeyExchangeClient

implements AbstractKeyExchange

An implementation of the diffie-hellman-group1-sha1 key exchange mechanism that uses JCE provider for DH agreement and Digest.

Author:

Lee David Painter

Field Summary

static java.lang.String

DIFFIE_HELLMAN_GROUP1_SHA1 Constant for the algorithm name "diffie-hellman-group1-sha1".

Fields inherited from class com.maverick.ssh.components.SshKeyExchangeClient

exchangeHash, hostKey, secret, signature, transport

Constructor Summary

DiffieHellmanGroup1Sha1()
Construct an uninitialized instance.

Method Summary

protected void	calculateExchangeHash() Calculates the exchange hash as an SHA1 hash of the following data.
java.lang.String	getAlgorithm() Get the algorithm name for this key exchange
java.lang.String	getProvider()
boolean	isKeyExchangeMessage(int messageid)
void	performClientExchange(java.lang.String clientIdentification, java.lang.String serverIdentification, byte[] clientKexInit, byte[] serverKexInit) Override to perform the client side key exchange.

Methods inherited from class com.maverick.ssh.components.SshKeyExchangeClient

getExchangeHash, getHostKey, getSecret, getSignature, init, reset

Methods inherited from class java.lang.Object

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

Field Detail

DIFFIE_HELLMAN_GROUP1_SHA1

public static final java.lang.String DIFFIE_HELLMAN_GROUP1_SHA1

Constant for the algorithm name "diffie-hellman-group1-sha1".

See Also:

Constant Field Values

Constructor Detail

DiffieHellmanGroup1Sha1

public DiffieHellmanGroup1Sha1()

Construct an uninitialized instance.

Method Detail

getAlgorithm

public java.lang.String getAlgorithm()

Get the algorithm name for this key exchange

Specified by:

getAlgorithm in class SshKeyExchangeClient

Returns:

"diffie-hellman-group1-sha1"

getProvider

public java.lang.String getProvider()

Specified by:

getProvider in interface AbstractKeyExchange

performClientExchange

public void performClientExchange(java.lang.String clientIdentification,
                                  java.lang.String serverIdentification,
                                  byte[] clientKexInit,
                                  byte[] serverKexInit)
                           throws SshException

Description copied from class: SshKeyExchangeClient

Override to perform the client side key exchange. The implementation should not return until all messages have been sent.

Specified by:

performClientExchange in class SshKeyExchangeClient

Parameters:

clientIdentification -

serverIdentification -

clientKexInit -

serverKexInit -

Throws:

SshException

calculateExchangeHash

protected void calculateExchangeHash()
                              throws SshException

Calculates the exchange hash as an SHA1 hash of the following data.

  String         the client's version string (CR and NL excluded)
  String         the server's version string (CR and NL excluded)
  String         the payload of the client's SSH_MSG_KEXINIT
  String         the payload of the server's SSH_MSG_KEXINIT
  String         the host key
  BigInteger     e, exchange value sent by the client
  BigInteger     f, exchange value sent by the server
  BigInteger     K, the shared secret
 

Throws:

java.io.IOException

SshException

isKeyExchangeMessage

public boolean isKeyExchangeMessage(int messageid)

Specified by:

isKeyExchangeMessage in class SshKeyExchangeClient