zeta.crypto
Class Encrypter

java.lang.Object
  |
  +--zeta.crypto.Encrypter

public class Encrypter

extends java.lang.Object

Encrypts every communication between the client and the server using a key establishment protocol (half-certified Diffie-Hellman) with keys which have a length of 1024 Bit.

Field Summary

private Key	key
private int	KEY_LENGTH

Constructor Summary

Encrypter(Key key)

Method Summary

static void	bzip2CompressData(java.lang.String inFilename, java.lang.String outFilename) Compresses a specified file.
void	encrypt(int randomize, long inLength, java.io.InputStream in, java.io.OutputStream out) Encrypts a specified input stream.
void	encrypt(int randomize, java.lang.String inFilename, java.lang.String outFilename) Encrypts a specified file.
java.lang.String	encryptURLFile(java.lang.String urlFile) Encrypts the file attribute of a URL.
static void	main(java.lang.String[] args) Simple test program.

Methods inherited from class java.lang.Object

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

Field Detail

key

private Key key

KEY_LENGTH

private final int KEY_LENGTH

See Also:

Constant Field Values

Constructor Detail

Encrypter

public Encrypter(Key key)

Parameters:

key - key for the encryption algorithm

Method Detail

encrypt

public void encrypt(int randomize,
                    java.lang.String inFilename,
                    java.lang.String outFilename)
             throws java.io.IOException

Encrypts a specified file. Every transfer of a result uses a key establishment protocol (half-certified Diffie-Hellman) with keys which have a length of 1024 Bit.

Parameters:

randomize - random number for the key establishment protocol

inFilename - name of the file which should be encrypted

outFilename - name of the encrypted file

Throws:

java.io.IOException - if an I/O error occurs.

encrypt

public void encrypt(int randomize,
                    long inLength,
                    java.io.InputStream in,
                    java.io.OutputStream out)
             throws java.io.IOException

Encrypts a specified input stream. Every transfer of a result uses a key establishment protocol (half-certified Diffie-Hellman) with keys which have a length of 1024 Bit.

Parameters:

randomize - random number for the key establishment protocol

inLength - inLength length of the input stream which should be encrypted

in - input stream which should be encrypted

out - output stream for the encrypted data

Throws:

java.io.IOException - if an I/O error occurs.

encryptURLFile

public java.lang.String encryptURLFile(java.lang.String urlFile)
                                throws java.io.IOException

Encrypts the file attribute of a URL. The default encryption algorithmus will be used.

Parameters:

urlFile - file attribute of a URL

Returns:

encrypted file attribute of a URL where the parameters are packed in a new parameter 'param'

Throws:

java.io.IOException - if an I/O error occurs.

bzip2CompressData

public static void bzip2CompressData(java.lang.String inFilename,
                                     java.lang.String outFilename)
                              throws java.io.IOException

Compresses a specified file.

Parameters:

inFilename - name of the file which should be compressed

outFilename - name of the compressed file

Throws:

java.io.IOException - if an I/O error occurs.

main

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

Simple test program.