net.schmizz.sshj.transport.cipher

Class BaseCipher

java.lang.Object

net.schmizz.sshj.transport.cipher.BaseCipher

All Implemented Interfaces:

Cipher

Direct Known Subclasses:

BlockCipher, StreamCipher

public abstract class BaseCipher
extends java.lang.Object
implements Cipher

Base class for all Cipher implementations delegating to the JCE provider.

Nested Class Summary

Nested classes/interfaces inherited from interface net.schmizz.sshj.transport.cipher.Cipher

Cipher.Mode

Constructor Summary

Constructors

Constructor and Description
BaseCipher(int ivsize, int bsize, java.lang.String algorithm, java.lang.String transformation)

Method Summary

Modifier and Type	Method and Description
int	getBlockSize()
int	getIVSize()
protected javax.crypto.spec.SecretKeySpec	getKeySpec(byte[] key)
protected int	getMode(Cipher.Mode mode)
void	init(Cipher.Mode mode, byte[] key, byte[] iv) Initialize the cipher for encryption or decryption with the given private key and initialization vector
protected abstract void	initCipher(javax.crypto.Cipher cipher, Cipher.Mode mode, byte[] key, byte[] iv)
void	update(byte[] input, int inputOffset, int inputLen) Performs in-place encryption or decryption on the given data.

Methods inherited from class java.lang.Object

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

Constructor Detail

BaseCipher

public BaseCipher(int ivsize,
                  int bsize,
                  java.lang.String algorithm,
                  java.lang.String transformation)

Method Detail

getBlockSize

public int getBlockSize()

Specified by:

getBlockSize in interface Cipher

Returns:

the block size for this cipher

getIVSize

public int getIVSize()

Specified by:

getIVSize in interface Cipher

Returns:

the size of the initialization vector

init

public void init(Cipher.Mode mode,
                 byte[] key,
                 byte[] iv)

Description copied from interface: Cipher

Initialize the cipher for encryption or decryption with the given private key and initialization vector

Specified by:

init in interface Cipher

Parameters:

mode - whether this instance wil encrypt or decrypt

key - the key for the cipher

iv - initialization vector

initCipher

protected abstract void initCipher(javax.crypto.Cipher cipher,
                                   Cipher.Mode mode,
                                   byte[] key,
                                   byte[] iv)
                            throws java.security.InvalidKeyException,
                                   java.security.InvalidAlgorithmParameterException

Throws:

java.security.InvalidKeyException

java.security.InvalidAlgorithmParameterException

getKeySpec

protected javax.crypto.spec.SecretKeySpec getKeySpec(byte[] key)

getMode

protected int getMode(Cipher.Mode mode)

update

public void update(byte[] input,
                   int inputOffset,
                   int inputLen)

Description copied from interface: Cipher

Performs in-place encryption or decryption on the given data.

Specified by:

update in interface Cipher

Parameters:

input - the subject

inputOffset - offset at which to start

inputLen - number of bytes starting at inputOffset