client
Class MessageGenerator

java.lang.Object
  client.MessageGenerator

final class MessageGenerator
extends java.lang.Object

Provides methods for generating messages (the mixes are capable of processing) from byte arrays.

Author:

Karl-Peter Fuchs

Constructor Summary

protected

MessageGenerator(int numberOfMixesInCascade, Cryptography cryptography) Generates a new MessageGenerator for generating messages (the mixes are capable of processing) from byte arrays.

Method Summary

protected byte[]	generateChannelEstablishMessage(byte[] bytePayload) Generates a message which consists of one or more (encrypted) layers, the cascade's mixes are capable of processing from the bypassed data (Type: ChannelEstablishMessage).
protected byte[]	generateChannelMessage(byte[] bytePayload) Generates a message which consists of one or more (encrypted) layers, the cascade's mixes are capable of processing from the bypassed data (Type: ChannelMessage).

Methods inherited from class java.lang.Object

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

Constructor Detail

MessageGenerator

protected MessageGenerator(int numberOfMixesInCascade,
                           Cryptography cryptography)

Generates a new MessageGenerator for generating messages (the mixes are capable of processing) from byte arrays.

Parameters:

numberOfMixesInCascade - Number of mixes in the cascade this Client shall use.

cryptography - Reference on Cryptography object that shall be used to encrypt messages.

Method Detail

generateChannelEstablishMessage

protected byte[] generateChannelEstablishMessage(byte[] bytePayload)
                                          throws MessageTooLongException

Generates a message which consists of one or more (encrypted) layers, the cascade's mixes are capable of processing from the bypassed data (Type: ChannelEstablishMessage). A layer is added for each mix in the cascade.

Parameters:

bytePayload - Data to generate the mix message from.

Returns:

The generated ChannelEstablishMessage as a byte array.

Throws:

MessageTooLongException - Thrown when the bypassed message is larger than the maximum message size.

generateChannelMessage

protected byte[] generateChannelMessage(byte[] bytePayload)
                                 throws MessageTooLongException

Generates a message which consists of one or more (encrypted) layers, the cascade's mixes are capable of processing from the bypassed data (Type: ChannelMessage). A layer is added for each mix in the cascade.

Parameters:

bytePayload - Data to generate the mix message from.

Returns:

The generated ChannelMessage as a byte array.

Throws:

MessageTooLongException - Thrown when the bypassed message is larger than the maximum message size.