cryptix.provider.padding
Class OneAndZeroes
- Padding, Parameterized
public final class OneAndZeroes
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 $
java.security.PaddingScheme
protected boolean | engineIsValidBlockSize(int size) - SPI: Returns true if size is a valid block size (in
bytes) for this algorithm.
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protected int | enginePad(byte[] in, int offset, int length) - Pads a given array of bytes.
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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.
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clone , engineGetParameter , engineIsValidBlockSize , enginePad , engineSetBlockSize , engineSetParameter , engineUnpad , getAlgorithm , getAlgorithms , getAlgorithms , getBlockSize , getInstance , getInstance , getParameter , pad , padLength , paddingScheme , setParameter , toString , unpad |
OneAndZeroes
public OneAndZeroes()
Creates a OneAndZeroes object.
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.
- engineIsValidBlockSize in interface PaddingScheme
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]
.
- enginePad in interface PaddingScheme
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.
- engineUnpad in interface PaddingScheme
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.
- the index into the in buffer indicating where the
padding starts.