Class Decoder

java.lang.Object
  |
  +--Decoder

public class Decoder

extends java.lang.Object

This class takes a BigInteger as encoded text and decodes it into an array of bytes.

Constructor Summary

Decoder(java.math.BigInteger d, java.math.BigInteger n)
Constructs a new Decoder

Method Summary

byte[]	decode(java.math.BigInteger c) This takes a BigInteger representing an encoded value and decodes it into an array of bytes representing plain text
static void	main(java.lang.String[] args) Tests the Decoder class

Methods inherited from class java.lang.Object

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

Constructor Detail

Decoder

public Decoder(java.math.BigInteger d,
               java.math.BigInteger n)

Constructs a new Decoder

Parameters:

d, - n These contain values for the decoding exponent and the modulus

Postcondition

A new Decoder has been created that contains the passed values.

Throws:

OutOfMemoryError - Indicates that there is insufficient memory for a new Decoder.

Method Detail

decode

public byte[] decode(java.math.BigInteger c)

This takes a BigInteger representing an encoded value and decodes it into an array of bytes representing plain text

Parameters:

c - This contains a BigInteger

Returns:

Returns an array of bytes containing the decoded data

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

Tests the Decoder class

Parameters:

args[] - This parameter will be left empty

Postcondition

The BigInteger that represents the encoded value will be printed.

Throws:

OutOfMemoryError - Indicates that there is insufficient memory for a new Decoder, KeyGen, or array of bytes.