lava.security.des
Class DesEcbDecoder

java.lang.Object
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  +--lava.security.des.DesEcbCoder
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        +--lava.security.des.DesEcbDecoder

public class DesEcbDecoder

extends DesEcbCoder

Decrypts using DES-ECB.

Details: DesEcbDecoder decrypts long arrays using DES (or 3DES) in ECB mode. Please refer to the superclass documentation for important information regarding usage.

Since:

2001.02.02

Author:

Sharky

Constructor Summary

DesEcbDecoder(IBlockCipher64 engine)
Sets decryption engine.

Method Summary

int	continueTransform(java.lang.Object src, java.lang.Object dest, int length) Decrypts longs.

Methods inherited from class lava.security.des.DesEcbCoder

beginTransform, completeTransform, getTransformInputWidth, getTransformOutputWidth

Methods inherited from class java.lang.Object

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

Constructor Detail

DesEcbDecoder

public DesEcbDecoder(IBlockCipher64 engine)

Sets decryption engine.

Details: This constructor sets the 64-bit block decryption engine (engine) used for decryption. engine can be an instance of DesEngine, TripleDesEngine, or any other 64-bit block cipher that satisfies the IBlockCipher64 interface contract.

Parameters:

engine - the engine

Method Detail

continueTransform

public int continueTransform(java.lang.Object src,
                             java.lang.Object dest,
                             int length)

Decrypts longs.

Details: continueTransform decrypts the plain text stored in src and stores the resulting cipher text in the provided output array (dest). Both arrays must be long arrays. If dest is too short to store the result, the overflow is discarded.

Parameters:

src - cipher text

dest - plain text

length - number of cipher text symbols

Returns:

number of plain text symbols stored or discarded