de.bb.security
Class Iso9796

java.lang.Object
  |
  +--de.bb.security.Iso9796

public class Iso9796

extends java.lang.Object

Constructor Summary

Iso9796()

Method Summary

static byte[]	pad(byte[] in, int inbits, int ks) pad an input data according to ISO9796 to fit the specified keylength
static byte[]	unpad(byte[] in) unpad an input data according to ISO9796

Methods inherited from class java.lang.Object

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

Constructor Detail

Iso9796

public Iso9796()

Method Detail

pad

public static byte[] pad(byte[] in,
                         int inbits,
                         int ks)

pad an input data according to ISO9796 to fit the specified keylength

Parameters:

in - - input data

ks - - the length of the modulo

Returns:

a new allocated byte array containing the padded data

unpad

public static byte[] unpad(byte[] in)

unpad an input data according to ISO9796

Parameters:

in - - input data

Returns:

a new allocated byte array containing the unpadded data or null on error