Package com.sshtools.client.components

Class DiffieHellmanEcdh

java.lang.Object

com.sshtools.client.SshKeyExchangeClient

com.sshtools.client.components.DiffieHellmanEcdh

All Implemented Interfaces:

Component, SshComponent, SecureComponent, SshKeyExchange<SshClientContext>

Direct Known Subclasses:

DiffieHellmanEcdhNistp256, DiffieHellmanEcdhNistp384, DiffieHellmanEcdhNistp521

public abstract class DiffieHellmanEcdh
extends SshKeyExchangeClient
implements SshKeyExchange<SshClientContext>

Field Summary

Fields

Modifier and Type	Field	Description
static final int	SSH_MSG_KEX_ECDH_INIT
static final int	SSH_MSG_KEX_ECDH_REPLY

Fields inherited from class com.sshtools.client.SshKeyExchangeClient

e, exchangeHash, f, firstPacketFollows, hostKey, key, secret, signature, transport, useFirstPacket

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	DiffieHellmanEcdh(String name, String curve, String hashAlgorithm, SecurityLevel securityLevel, int priority)

Method Summary

Modifier and Type	Method	Description
protected void	calculateExchangeHash()	Calculates the exchange hash as an SHA1 hash of the following data.
String	getAlgorithm()
String	getProvider()
void	init(SshTransport<SshClientContext> transport, String clientId, String serverId, byte[] clientKexInit, byte[] serverKexInit, SshPrivateKey prvkey, SshPublicKey pubkey, boolean firstPacketFollows, boolean useFirstPacket)
boolean	processMessage(byte[] msg)	Process a key exchange message
void	test()

Methods inherited from class com.sshtools.client.SshKeyExchangeClient

getExchangeHash, getHashAlgorithm, getHostKey, getPriority, getSecret, getSecurityLevel, 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

Methods inherited from interface com.sshtools.common.ssh.SecureComponent

getPriority, getSecurityLevel

Methods inherited from interface com.sshtools.synergy.ssh.components.SshKeyExchange

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

Field Details

SSH_MSG_KEX_ECDH_INIT

public static final int SSH_MSG_KEX_ECDH_INIT

See Also:

• Constant Field Values

SSH_MSG_KEX_ECDH_REPLY

public static final int SSH_MSG_KEX_ECDH_REPLY

See Also:

• Constant Field Values

Constructor Details

DiffieHellmanEcdh

protected DiffieHellmanEcdh(String name,
 String curve,
 String hashAlgorithm,
 SecurityLevel securityLevel,
 int priority)

Method Details

getAlgorithm

public String getAlgorithm()

Specified by:

getAlgorithm in interface SecureComponent

Specified by:

getAlgorithm in interface SshComponent

Specified by:

getAlgorithm in interface SshKeyExchange<SshClientContext>

calculateExchangeHash

protected void calculateExchangeHash()
                              throws SshException

Description copied from class: SshKeyExchangeClient

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
 

Overrides:

calculateExchangeHash in class SshKeyExchangeClient

Throws:

SshException

init

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

Specified by:

init in interface SshKeyExchange<SshClientContext>

Throws:

IOException

SshException

processMessage

public boolean processMessage(byte[] msg)
                       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

getProvider

public String getProvider()

Specified by:

getProvider in interface SshKeyExchange<SshClientContext>

test

public void test()
          throws IOException,
SshException

Specified by:

test in interface SshKeyExchange<SshClientContext>

Throws:

IOException

SshException