com.maverick.sshd.components.jce
Class DiffieHellmanGroup14Sha1JCE

java.lang.Object
  com.maverick.sshd.components.SshKeyExchangeServer
      com.maverick.sshd.components.jce.DiffieHellmanGroup14Sha1JCE

All Implemented Interfaces:

com.maverick.ssh.components.jce.AbstractKeyExchange, com.maverick.ssh.components.SshComponent

public class DiffieHellmanGroup14Sha1JCE
extends SshKeyExchangeServer
implements com.maverick.ssh.components.jce.AbstractKeyExchange

Implementation of the required SSH Transport Protocol key exchange method "diffie-hellman-group14-sha1".

Author:

Lee David Painter

Field Summary

static String

DIFFIE_HELLMAN_GROUP14_SHA1 Constant for the algorithm name "diffie-hellman-group14-sha1".

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

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

Constructor Summary

DiffieHellmanGroup14Sha1JCE()
Construct an uninitialized instance.

Method Summary

protected void	calculateExchangeHash() Calculates the exchange hash as an SHA1 hash of the following data.
String	getName() Get the algorithm name for this key exchange
String	getProvider()
void	init(org.apache.mina.core.session.IoSession session, SshTransport 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) 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 String DIFFIE_HELLMAN_GROUP14_SHA1

Constant for the algorithm name "diffie-hellman-group14-sha1".

See Also:

Constant Field Values

Constructor Detail

DiffieHellmanGroup14Sha1JCE

public DiffieHellmanGroup14Sha1JCE()

Construct an uninitialized instance.

Method Detail

getName

public String getName()

Get the algorithm name for this key exchange

Specified by:

getName in interface com.maverick.ssh.components.SshComponent

Specified by:

getName in class SshKeyExchangeServer

Returns:

"diffie-hellman-group14-sha1"

init

public void init(org.apache.mina.core.session.IoSession session,
                 SshTransport 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

Description copied from class: SshKeyExchangeServer

Initialize the server side key exchange.

Specified by:

init in class SshKeyExchangeServer

Throws:

IOException

getProvider

public String getProvider()

Specified by:

getProvider in interface com.maverick.ssh.components.jce.AbstractKeyExchange

processMessage

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

IOException

com.maverick.ssh.common.SshException

calculateExchangeHash

protected void calculateExchangeHash()
                              throws com.maverick.ssh.common.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.common.SshException