cryptix.provider.padding
Class OneAndZeroes
java.lang.Object
|
+--xjava.security.IJCE_Traceable
|
+--xjava.security.PaddingScheme
|
+--cryptix.provider.padding.OneAndZeroes
- public final class OneAndZeroes
- extends PaddingScheme
Class for padding cipher data with a binary-digit one, followed by
as many binary-digit zeroes as needed to fill this instance's
blockSize
.
Copyright © 1997
Systemics Ltd on behalf of the
Cryptix Development Team.
All rights reserved.
$Revision: 1.4 $
- Since:
- Cryptix 2.2.2
- Author:
- Raif S. Naffah
- See Also:
java.security.PaddingScheme
Constructor Summary |
OneAndZeroes()
Creates a OneAndZeroes object. |
Method Summary |
protected boolean |
engineIsValidBlockSize(int size)
SPI: Returns true if size is a valid block size (in
bytes) for this algorithm. |
protected int |
enginePad(byte[] in,
int offset,
int length)
Pads a given array of bytes. |
protected int |
engineUnpad(byte[] in,
int offset,
int length)
Given the specified subarray of bytes that includes padding bytes, returns
the index indicating where padding starts. |
Methods inherited from class xjava.security.PaddingScheme |
clone,
engineGetParameter,
engineSetBlockSize,
engineSetParameter,
getAlgorithm,
getAlgorithms,
getAlgorithms,
getBlockSize,
getInstance,
getInstance,
getParameter,
pad,
paddingScheme,
padLength,
setParameter,
toString,
unpad |
Methods inherited from class java.lang.Object |
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
wait,
wait,
wait |
OneAndZeroes
public OneAndZeroes()
- Creates a OneAndZeroes object.
enginePad
protected int enginePad(byte[] in,
int offset,
int length)
- Pads a given array of bytes. The padding is written to the same
buffer that is used for input (in). When this method returns,
the padded block will be stored at
in[offset..offset+blockSize-1]
.
- Overrides:
- enginePad in class PaddingScheme
- Parameters:
in
- the buffer containing the incomplete block.offset
- the offset into the in buffer of the
first byte in the group of bytes to be padded.length
- the number of bytes from the in buffer,
starting at offset, that need to be padded.
engineUnpad
protected int engineUnpad(byte[] in,
int offset,
int length)
- Given the specified subarray of bytes that includes padding bytes, returns
the index indicating where padding starts.
- Overrides:
- engineUnpad in class PaddingScheme
- Parameters:
in
- the buffer containing the bytes.offset
- the offset into the in buffer of the
first byte in the block.length
- the number of bytes from the in buffer
to check, starting at offset.- Returns:
- the index into the in buffer indicating where the
padding starts.
engineIsValidBlockSize
protected boolean engineIsValidBlockSize(int size)
- SPI: Returns true if size is a valid block size (in
bytes) for this algorithm.
For OneAndZeroes padding, all sizes are valid.
- Overrides:
- engineIsValidBlockSize in class PaddingScheme
Copyright (C) 1995-2000 The Cryptix Foundation Ltd. All rights reserved.