com.maverick.sshd.components.standalone
Class DiffieHellmanGroup1Sha1Server

java.lang.Object
  com.maverick.sshd.components.SshKeyExchangeServer
      com.maverick.sshd.components.standalone.DiffieHellmanGroup1Sha1Server

public class DiffieHellmanGroup1Sha1Server
extends SshKeyExchangeServer

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

Author:

Lee David Painter

Field Summary

static String

DIFFIE_HELLMAN_GROUP1_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

DiffieHellmanGroup1Sha1Server()
Construct an uninitialized instance.

Method Summary

protected void	calculateExchangeHash() Calculates the exchange hash as an SHA1 hash of the following data.
String	getAlgorithm() Get the algorithm name for this key exchange
void	init(TransportProtocol transport, String clientId, String serverId, byte[] clientKexInit, byte[] serverKexInit, com.maverick.ssh.components.SshPrivateKey prvkey, com.maverick.ssh.components.SshPublicKey pubkey, boolean firstPacketFollows, boolean useFirstPacket)
boolean	processMessage(byte[] msg)

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_GROUP1_SHA1

public static final String DIFFIE_HELLMAN_GROUP1_SHA1

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

See Also:

Constant Field Values

Constructor Detail

DiffieHellmanGroup1Sha1Server

public DiffieHellmanGroup1Sha1Server()

Construct an uninitialized instance.

Method Detail

getAlgorithm

public 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,
                 String clientId,
                 String serverId,
                 byte[] clientKexInit,
                 byte[] serverKexInit,
                 com.maverick.ssh.components.SshPrivateKey prvkey,
                 com.maverick.ssh.components.SshPublicKey pubkey,
                 boolean firstPacketFollows,
                 boolean useFirstPacket)
          throws IOException

Specified by:

init in class SshKeyExchangeServer

Throws:

IOException

processMessage

public boolean processMessage(byte[] msg)
                       throws com.maverick.ssh.SshException,
                              IOException

Specified by:

processMessage in class SshKeyExchangeServer

Throws:

com.maverick.ssh.SshException

IOException

calculateExchangeHash

protected void calculateExchangeHash()
                              throws com.maverick.ssh.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:

IOException

com.maverick.ssh.SshException