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cryptix.jce.provider.cipher
Class Padding  

java.lang.Object
  cryptix.jce.provider.cipher.Padding

Direct Known Subclasses:

PaddingNone, PaddingPKCS5

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abstract class Padding

extends java.lang.Object

A fully constructed Cipher instance looks like this:

 +------------------------------------------+
 | CipherSpi (API methods)                  |
 |                                          |
 | +--------------------------------------+ |
 | | Padding                              | |
 | |                                      | |
 | | +----------------------------------+ | |
 | | | Mode                             | | |
 | | |                                  | | |
 | | | +------------------------------+ | | |
 | | | | CipherSpi                    | | | |
 | | | | (blockcipher implementation) | | | |
 | | | |                              | | | |
 | | | +------------------------------+ | | |
 | | |                                  | | |
 | | +----------------------------------+ | |
 | |                                      | |
 | +--------------------------------------+ |
 |                                          |
 +------------------------------------------+
 

Version:

$Revision: 1.20 $

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Field Summary
private  int	blSize
protected  boolean	decrypt
private  boolean	isBuffered
private  Mode	mode           Cipher/Mode delegate
private  byte[]	scratchBuf

 

Constructor Summary
(package private)	Padding(Mode mode)

 

Method Summary
(package private) abstract  byte[]	corePad(byte[] input, int inputLen)
(package private) abstract  int	coreUnPad(byte[] input, int inputLen)
(package private)  int	doFinal(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset)
(package private)  int	getBlockSize()           This method delegates to the wrapped Mode instance.
protected  int	getBufSize()
(package private) static Padding	getInstance(java.lang.String padding, Mode mode)           Factory method for obtaining different padding type objects.
(package private)  byte[]	getIV()           This method delegates to the wrapped Mode instance.
(package private)  int	getOutputSize(int inputLen)
(package private) abstract  int	getPadSize(int inputLen)
(package private)  java.security.spec.AlgorithmParameterSpec	getParamSpec()           This method delegates to the wrapped Mode instance.
(package private)  void	init(boolean decrypt, java.security.Key key, java.security.spec.AlgorithmParameterSpec params, java.security.SecureRandom random)           This method delegates to the wrapped Mode instance.
(package private)  int	update(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset)           This method delegates to the wrapped Mode instance.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

mode

private final Mode mode

Cipher/Mode delegate

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scratchBuf

private byte[] scratchBuf

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blSize

private int blSize

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isBuffered

private boolean isBuffered

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decrypt

protected boolean decrypt

Constructor Detail

Padding

Padding(Mode mode)

Method Detail

getInstance

static Padding getInstance(java.lang.String padding,
                           Mode mode)
                    throws javax.crypto.NoSuchPaddingException

Factory method for obtaining different padding type objects. This method accept a padding name and a Mode instance and returns a Padding instance that wraps the given Mode instance. This class is package protected therefore the various padding types can be (and are) hardcoded here.

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getBlockSize

final int getBlockSize()

This method delegates to the wrapped Mode instance.

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getOutputSize

final int getOutputSize(int inputLen)

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getParamSpec

final java.security.spec.AlgorithmParameterSpec getParamSpec()

This method delegates to the wrapped Mode instance.

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getIV

final byte[] getIV()

This method delegates to the wrapped Mode instance.

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init

final void init(boolean decrypt,
                java.security.Key key,
                java.security.spec.AlgorithmParameterSpec params,
                java.security.SecureRandom random)
         throws java.security.InvalidKeyException,
                java.security.InvalidAlgorithmParameterException

This method delegates to the wrapped Mode instance.

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update

final int update(byte[] input,
                 int inputOffset,
                 int inputLen,
                 byte[] output,
                 int outputOffset)
          throws javax.crypto.ShortBufferException

This method delegates to the wrapped Mode instance.

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doFinal

final int doFinal(byte[] input,
                  int inputOffset,
                  int inputLen,
                  byte[] output,
                  int outputOffset)
           throws javax.crypto.ShortBufferException,
                  javax.crypto.IllegalBlockSizeException,
                  javax.crypto.BadPaddingException

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getBufSize

protected int getBufSize()

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corePad

abstract byte[] corePad(byte[] input,
                        int inputLen)
                 throws javax.crypto.IllegalBlockSizeException

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coreUnPad

abstract int coreUnPad(byte[] input,
                       int inputLen)
                throws javax.crypto.BadPaddingException

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getPadSize

abstract int getPadSize(int inputLen)

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Home >> All >> cryptix >> jce >> provider >> [ cipher overview ]	PREV CLASS  NEXT CLASS
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