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cryptix.jce.provider.cipher
Class ModeOFB  

java.lang.Object
  cryptix.jce.provider.cipher.Mode
      cryptix.jce.provider.cipher.ModeOFB

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final class ModeOFB

extends Mode

Please read the comments in the source.

Version:

$Revision: 1.13 $

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Field Summary
protected  int	bufCount           How many bytes the buffer holds
protected  BlockCipher	cipher           Underlying block cipher
protected  int	CIPHER_BLOCK_SIZE           Block size of underlying cipher
protected  boolean	decrypt           Decrypting?
private  byte[]	IV           the IV which is used here
private  byte[]	keyStreamBuf
private  int	keyStreamBufOffset

 

Constructor Summary
(package private)	ModeOFB(BlockCipher cipher)

 

Method Summary
(package private)  byte[]	coreGetIV()
(package private)  int	coreGetOutputSize(int inputLen)
(package private)  java.security.spec.AlgorithmParameterSpec	coreGetParamSpec()
(package private)  void	coreInit(boolean decrypt, java.security.Key key, java.security.spec.AlgorithmParameterSpec params, java.security.SecureRandom random)
(package private)  int	coreUpdate(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset)
protected  byte[]	extractIV(java.security.spec.AlgorithmParameterSpec params)
protected  byte[]	generateIV()
(package private)  int	getBlockSize()
(package private)  int	getBufSize()
(package private) static Mode	getInstance(java.lang.String mode, BlockCipher cipher)
(package private)  byte[]	getIV()
(package private)  int	getOutputSize(int inputLen)
(package private)  java.security.spec.AlgorithmParameterSpec	getParamSpec()
(package private)  void	init(boolean decrypt, java.security.Key key, java.security.spec.AlgorithmParameterSpec params, java.security.SecureRandom random)
(package private)  boolean	needsPadding()
(package private)  int	update(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset)

 

Methods inherited from class java.lang.Object

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

 

Field Detail

keyStreamBuf

private final byte[] keyStreamBuf

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keyStreamBufOffset

private int keyStreamBufOffset

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IV

private byte[] IV

the IV which is used here

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cipher

protected final BlockCipher cipher

Underlying block cipher

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CIPHER_BLOCK_SIZE

protected final int CIPHER_BLOCK_SIZE

Block size of underlying cipher

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decrypt

protected boolean decrypt

Decrypting?

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bufCount

protected int bufCount

How many bytes the buffer holds

Constructor Detail

ModeOFB

ModeOFB(BlockCipher cipher)

Method Detail

coreGetOutputSize

final int coreGetOutputSize(int inputLen)

Specified by:

coreGetOutputSize in class Mode

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coreInit

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

Specified by:

coreInit in class Mode

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coreUpdate

final int coreUpdate(byte[] input,
                     int inputOffset,
                     int inputLen,
                     byte[] output,
                     int outputOffset)

Specified by:

coreUpdate in class Mode

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coreGetIV

final byte[] coreGetIV()

Specified by:

coreGetIV in class Mode

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coreGetParamSpec

final java.security.spec.AlgorithmParameterSpec coreGetParamSpec()

Specified by:

coreGetParamSpec in class Mode

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needsPadding

final boolean needsPadding()

Specified by:

needsPadding in class Mode

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getInstance

static Mode getInstance(java.lang.String mode,
                        BlockCipher cipher)
                 throws java.security.NoSuchAlgorithmException

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init

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

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getIV

final byte[] getIV()

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getParamSpec

final java.security.spec.AlgorithmParameterSpec getParamSpec()

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getOutputSize

final int getOutputSize(int inputLen)

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getBlockSize

final int getBlockSize()

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update

final int update(byte[] input,
                 int inputOffset,
                 int inputLen,
                 byte[] output,
                 int outputOffset)

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getBufSize

final int getBufSize()

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generateIV

protected byte[] generateIV()

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extractIV

protected final byte[] extractIV(java.security.spec.AlgorithmParameterSpec params)
                          throws java.security.InvalidAlgorithmParameterException

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> cryptix >> jce >> provider >> [ cipher overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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