Package com.sshtools.client.components

Class Rsa2048Sha256

java.lang.Object

com.sshtools.client.SshKeyExchangeClient

com.sshtools.client.components.Rsa2048Sha256

All Implemented Interfaces:

Component, SshComponent, SecureComponent, AbstractKeyExchange, SshKeyExchange<SshClientContext>

public class Rsa2048Sha256
extends SshKeyExchangeClient
implements AbstractKeyExchange

Implementation of RFC 4432 https://tools.ietf.org/html/rfc4432

Author:

Lee David Painter

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Rsa2048Sha256.Rsa2048Sha256Factory

Field Summary

Fields

Modifier and Type	Field	Description
static final String	RSA_2048_SHA256	Constant for the algorithm name "rsa2048-sha256".

Fields inherited from class com.sshtools.client.SshKeyExchangeClient

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

Constructor Summary

Constructors

Constructor	Description
Rsa2048Sha256()	Construct an uninitialized instance.

Method Summary

Modifier and Type	Method	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	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[] tmp)	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

Field Details

RSA_2048_SHA256

public static final String RSA_2048_SHA256

Constant for the algorithm name "rsa2048-sha256".

See Also:

• Constant Field Values

Constructor Details

Rsa2048Sha256

public Rsa2048Sha256()

Construct an uninitialized instance.

Method Details

getAlgorithm

public String getAlgorithm()

Get the algorithm name for this key exchange

Specified by:

getAlgorithm in interface SecureComponent

Specified by:

getAlgorithm in interface SshComponent

Specified by:

getAlgorithm in interface SshKeyExchange<SshClientContext>

Returns:

"diffie-hellman-group1-sha1"

getProvider

public String getProvider()

Specified by:

getProvider in interface AbstractKeyExchange

Specified by:

getProvider in interface SshKeyExchange<SshClientContext>

test

public void test()

Specified by:

test in interface SshKeyExchange<SshClientContext>

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[] tmp)
                       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
 

Overrides:

calculateExchangeHash in class SshKeyExchangeClient

Throws:

IOException

SshException