cryptix.provider.padding
Class OneAndZeroes
java.lang.Object
|
+--xjava.security.IJCE_Traceable
|
+--xjava.security.PaddingScheme
|
+--cryptix.provider.padding.OneAndZeroes
- All Implemented Interfaces:
- Padding, Parameterized
- 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