de.flexiprovider.common.padding
Class NoPadding

java.lang.Object
  |
  +--de.flexiprovider.api.PaddingScheme
        |
        +--de.flexiprovider.common.padding.NoPadding

public class NoPadding

extends PaddingScheme

NoPadding leaves the input unchanged in case of a suitable blocksize. Otherwise, it will throw a BadPaddingException.

Author:

Andre Maric, Witold Wegner

Fields inherited from class de.flexiprovider.api.PaddingScheme

blockSize

Constructor Summary

NoPadding()

Method Summary

protected void	pad(byte[] input, int inOff, int inLen) Pad the input to make its length divisible by the the block length.
protected int	padLength(int inLen) Return the number of bytes which will be appended to the the plaintext during padding.
protected int	unpad(byte[] input, int inOff, int inLen) Given the plaintext that includes the padding bytes, unpad the plaintext and return the index indicating where the padding bytes start.

Methods inherited from class de.flexiprovider.api.PaddingScheme

setBlockSize

Methods inherited from class java.lang.Object

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

Constructor Detail

NoPadding

public NoPadding()

Method Detail

padLength

protected int padLength(int inLen)

Description copied from class: PaddingScheme

Return the number of bytes which will be appended to the the plaintext during padding.

Overrides:

padLength in class PaddingScheme

Following copied from class: de.flexiprovider.api.PaddingScheme

Parameters:

inLen - the length of the plaintext to be padded

Returns:

the number of padding bytes (may be 0)

pad

protected void pad(byte[] input,
                   int inOff,
                   int inLen)
            throws BadPaddingException

Description copied from class: PaddingScheme

Pad the input to make its length divisible by the the block length. The padding is written to the same buffer which is used for input. The caller has to ensure that the input array is large enough to hold the padding bytes.

Overrides:

pad in class PaddingScheme

Following copied from class: de.flexiprovider.api.PaddingScheme

Parameters:

input - byte array containing the plaintext to be padded

inOff - index where the plaintext starts

inLen - length of the plaintext

Throws:

BadPaddingException - if the input buffer is too small to hold the padding bytes.

unpad

protected int unpad(byte[] input,
                    int inOff,
                    int inLen)

Description copied from class: PaddingScheme

Given the plaintext that includes the padding bytes, unpad the plaintext and return the index indicating where the padding bytes start.

Overrides:

unpad in class PaddingScheme

Following copied from class: de.flexiprovider.api.PaddingScheme

Parameters:

input - byte array containing the padded plaintext

inOff - index where the plaintext starts

inLen - size of the plaintext

Returns:

index in the array where the padding bytes start

Throws:

BadPaddingException - if unpadding fails.