anon.mixminion.message
Class Decoder

java.lang.Object
  anon.mixminion.message.Decoder

public class Decoder
extends java.lang.Object

Author:

Stefan Roenisch

Field Summary

private int	KEY_LEN
private java.lang.String	m_message
private java.lang.String	m_password
private int	MAXHOPS
private int	PACKETSIZE

Constructor Summary

Decoder(java.lang.String message, java.lang.String password)
Constructor

Method Summary

private int	byteToInt(byte[] b, int offset) Calculates the int value of a given ByteArray
java.lang.String	decode() Method to decode a given payload as String
private int	testPayload(byte[] payload) Tests a given payload for being a plaintext one
private java.lang.String	trytoReassemble(byte[] fragment) try's to reassemble the message the fragment belongs to and returns either null or the reassembled message
private byte[]	unwhiten(byte[] m) Unwhites a ByteArray in the fashion of mixminion

Methods inherited from class java.lang.Object

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

Field Detail

KEY_LEN

private final int KEY_LEN

See Also:

Constant Field Values

MAXHOPS

private final int MAXHOPS

See Also:

Constant Field Values

PACKETSIZE

private final int PACKETSIZE

See Also:

Constant Field Values

m_message

private java.lang.String m_message

m_password

private java.lang.String m_password

Constructor Detail

Decoder

public Decoder(java.lang.String message,
               java.lang.String password)

Constructor

Parameters:

message -

Method Detail

decode

public java.lang.String decode()
                        throws java.io.IOException

Method to decode a given payload as String

Returns:

String decodedMessages

Throws:

java.io.IOException

testPayload

private int testPayload(byte[] payload)

Tests a given payload for being a plaintext one

Parameters:

payload -

Returns:

true if a message, false otherwise

trytoReassemble

private java.lang.String trytoReassemble(byte[] fragment)

try's to reassemble the message the fragment belongs to and returns either null or the reassembled message

Parameters:

fragment -

Returns:

byteToInt

private int byteToInt(byte[] b,
                      int offset)

Calculates the int value of a given ByteArray

Parameters:

b -

offset -

Returns:

int value of the bytearray

unwhiten

private byte[] unwhiten(byte[] m)

Unwhites a ByteArray in the fashion of mixminion

Parameters:

m -

Returns: