com.maverick.sshd.components.standalone
Class DiffieHellmanGroup14Sha1Server

java.lang.Object
  com.maverick.sshd.components.SshKeyExchangeServer
      com.maverick.sshd.components.standalone.DiffieHellmanGroup14Sha1Server

public class DiffieHellmanGroup14Sha1Server
extends SshKeyExchangeServer

Implementation of the required SSH Transport Protocol key exchange method "diffie-hellman-group1-sha1".

Author:

Lee David Painter

Field Summary

static java.lang.String

DIFFIE_HELLMAN_GROUP14_SHA1 Constant for the algorithm name "diffie-hellman-group1-sha1".

Fields inherited from class com.maverick.sshd.components.SshKeyExchangeServer

clientId, clientKexInit, exchangeHash, firstPacketFollows, hostKey, prvkey, pubkey, secret, serverId, serverKexInit, signature, transport, useFirstPacket

Constructor Summary

DiffieHellmanGroup14Sha1Server()
Construct an uninitialized instance.

Method Summary

protected void	calculateExchangeHash() Calculates the exchange hash as an SHA1 hash of the following data.
boolean	exchangeGroup(byte[] msg) Exchange groups
java.lang.String	getAlgorithm() Get the algorithm name for this key exchange
void	init(TransportProtocol transport, java.lang.String clientId, java.lang.String serverId, byte[] clientKexInit, byte[] serverKexInit, SshPrivateKey prvkey, SshPublicKey pubkey, boolean firstPacketFollows, boolean useFirstPacket) Initialize the server side key exchange.
boolean	processMessage(byte[] msg) Process a key exchange message

Methods inherited from class com.maverick.sshd.components.SshKeyExchangeServer

getExchangeHash, getHostKey, getSecret, getSignature, hasReceivedNewKeys, hasSentNewKeys, reset, setReceivedNewKeys, setSentNewKeys

Methods inherited from class java.lang.Object

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

Field Detail

DIFFIE_HELLMAN_GROUP14_SHA1

public static final java.lang.String DIFFIE_HELLMAN_GROUP14_SHA1

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

See Also:

Constant Field Values

Constructor Detail

DiffieHellmanGroup14Sha1Server

public DiffieHellmanGroup14Sha1Server()

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 SshKeyExchangeServer

Returns:

"diffie-hellman-group1-sha1"

init

public void init(TransportProtocol transport,
                 java.lang.String clientId,
                 java.lang.String serverId,
                 byte[] clientKexInit,
                 byte[] serverKexInit,
                 SshPrivateKey prvkey,
                 SshPublicKey pubkey,
                 boolean firstPacketFollows,
                 boolean useFirstPacket)
          throws java.io.IOException

Description copied from class: SshKeyExchangeServer

Initialize the server side key exchange.

Specified by:

init in class SshKeyExchangeServer

Throws:

java.io.IOException

processMessage

public boolean processMessage(byte[] msg)
                       throws SshException,
                              java.io.IOException

Description copied from class: SshKeyExchangeServer

Process a key exchange message

Specified by:

processMessage in class SshKeyExchangeServer

Returns:

boolean, indicating whether it has processed the message or not

Throws:

java.io.IOException

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

exchangeGroup

public boolean exchangeGroup(byte[] msg)
                      throws SshException,
                             java.io.IOException

Description copied from class: SshKeyExchangeServer

Exchange groups

Specified by:

exchangeGroup in class SshKeyExchangeServer

Returns:

boolean, indicating whether it has processed the message or not

Throws:

SshException

java.io.IOException