com.sshtools.client.components

Class DiffieHellmanGroup1Sha1JCE

java.lang.Object

com.sshtools.client.SshKeyExchangeClient

com.sshtools.client.components.DiffieHellmanGroup1Sha1JCE

All Implemented Interfaces:

SshKeyExchange<SshClientContext>

public class DiffieHellmanGroup1Sha1JCE
extends SshKeyExchangeClient

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

Field Summary

Fields

Modifier and Type	Field and Description
static String	DIFFIE_HELLMAN_GROUP1_SHA1 Constant for the algorithm name "diffie-hellman-group1-sha1".

Fields inherited from class com.sshtools.client.SshKeyExchangeClient

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

Constructor Summary

Constructors

Constructor and Description
DiffieHellmanGroup1Sha1JCE() Construct an uninitialized instance.

Method Summary

Modifier and Type	Method and Description
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
String	getHashAlgorithm()
String	getProvider()
void	init(TransportProtocol<SshClientContext> transport, String clientId, String serverId, byte[] clientKexInit, byte[] serverKexInit, SshPrivateKey prvkey, SshPublicKey pubkey, boolean firstPacketFollows, boolean useFirstPacket)
boolean	isKeyExchangeMessage(int messageid)
boolean	processMessage(byte[] m) Process a key exchange message
void	test()

Methods inherited from class com.sshtools.client.SshKeyExchangeClient

getExchangeHash, getHostKey, getSecret, getSignature, hasReceivedNewKeys, hasSentNewKeys, isComplete, 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

DiffieHellmanGroup1Sha1JCE

public DiffieHellmanGroup1Sha1JCE()

Construct an uninitialized instance.

Method Detail

getAlgorithm

public String getAlgorithm()

Get the algorithm name for this key exchange

Returns:

"diffie-hellman-group1-sha1"

init

public void init(TransportProtocol<SshClientContext> transport,
                 String clientId,
                 String serverId,
                 byte[] clientKexInit,
                 byte[] serverKexInit,
                 SshPrivateKey prvkey,
                 SshPublicKey pubkey,
                 boolean firstPacketFollows,
                 boolean useFirstPacket)
          throws IOException,
                 SshException

Throws:

IOException

SshException

getProvider

public String getProvider()

processMessage

public boolean processMessage(byte[] m)
                       throws SshException,
                              IOException

Description copied from class: SshKeyExchangeClient

Process a key exchange message

Specified by:

processMessage in interface SshKeyExchange<SshClientContext>

Specified by:

processMessage in class SshKeyExchangeClient

Returns:

boolean, indicating whether it has processed the message or not

Throws:

SshException

IOException

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:

IOException

SshException

isKeyExchangeMessage

public boolean isKeyExchangeMessage(int messageid)

getHashAlgorithm

public String getHashAlgorithm()

test

public void test()
          throws IOException,
                 SshException

Throws:

IOException

SshException