Package com.sshtools.common.ssh.components

Class NoneCipher

java.lang.Object

com.sshtools.common.ssh.components.AbstractSshCipher

com.sshtools.common.ssh.components.NoneCipher

All Implemented Interfaces:

Component, SshCipher, SshComponent, SecureComponent

public class NoneCipher
extends AbstractSshCipher

This special cipher implementation provides an unencrypted connection. This is not enabled by default and should be used with caution. To enable and use the cipher you should add the following code before you connect your SSH client.

 SshConnector con = SshConnector.getInstance();
 Ssh2Context ssh2Context = (Ssh2Context) con.getContext(SshConnector.SSH2);
 ssh2Context.supportedCiphers().add("none", NoneCipher.class);
 ssh2Context.setPreferredCipherCS("none");
 ssh2Context.setPreferredCipherSC("none");
 

Author:

Lee David Painter

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	NoneCipher.NoneCipherFactory

Field Summary

Fields inherited from interface com.sshtools.common.ssh.components.SshCipher

DECRYPT_MODE, ENCRYPT_MODE

Constructor Summary

Constructors

Constructor	Description
NoneCipher()

Method Summary

Modifier and Type	Method	Description
int	getBlockSize()	Get the cipher block size.
int	getKeyLength()	Return the key length required
String	getProviderName()
void	init(int mode, byte[] iv, byte[] keydata)	Initialize the cipher with up to 40 bytes of iv and key data.
void	transform(byte[] src, int start, byte[] dest, int offset, int len)	Transform the byte array according to the cipher mode; it is legal for the source and destination arrays to reference the same physical array so care should be taken in the transformation process to safeguard this rule.

Methods inherited from class com.sshtools.common.ssh.components.AbstractSshCipher

getAlgorithm, getMacLength, getPriority, getSecurityLevel, isMAC, transform

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

NoneCipher

public NoneCipher()

Method Details

getBlockSize

public int getBlockSize()

Get the cipher block size.

Specified by:

getBlockSize in interface SshCipher

Specified by:

getBlockSize in class AbstractSshCipher

Returns:

the block size in bytes.

getKeyLength

public int getKeyLength()

Description copied from class: AbstractSshCipher

Return the key length required

Specified by:

getKeyLength in interface SshCipher

Specified by:

getKeyLength in class AbstractSshCipher

Returns:

init

public void init(int mode,
 byte[] iv,
 byte[] keydata)
          throws IOException

Initialize the cipher with up to 40 bytes of iv and key data.

Specified by:

init in interface SshCipher

Specified by:

init in class AbstractSshCipher

Parameters:

mode - the mode to operate

iv - the initiaization vector

keydata - the key data

Throws:

IOException

transform

public void transform(byte[] src,
 int start,
 byte[] dest,
 int offset,
 int len)
               throws IOException

Transform the byte array according to the cipher mode; it is legal for the source and destination arrays to reference the same physical array so care should be taken in the transformation process to safeguard this rule.

Specified by:

transform in interface SshCipher

Specified by:

transform in class AbstractSshCipher

Parameters:

src - byte[]

start - int

dest - byte[]

offset - int

len - int

Throws:

IOException

getProviderName

public String getProviderName()

Specified by:

getProviderName in interface SshCipher

Specified by:

getProviderName in class AbstractSshCipher