org.dmonix.cipher
Class DataCipherer

java.lang.Object
  org.dmonix.cipher.DataCipherer

public abstract class DataCipherer

extends java.lang.Object

Utility class for encoding/decoding small amounts of data using ciphers.
The class is designed to encode/decode smaller amounts of data, e.g. strings that are to be stored on file or in a database.
The class can also encode/decode files.
If larger amounts of streamed data is to be encoded/decoded it is advised to use any of the sub classes to DMCipherInputStream and DMCipherOutputStream.

Copyright: Copyright (c) 2004

Company: dmonix.org

Version:

1.0

Author:

Peter Nerg

Constructor Summary

DataCipherer()

Method Summary

java.lang.Object	clone() THIS METHOD IS NOT SUPPORTED!
static byte[]	decodeDataDES(byte[] b, byte[] key) Decodes the data using the DES algorithm.
static byte[]	decodeDataPBE(byte[] b, char[] key) Decodes the data using the PBEWithMD5AndDES algorithm.
static void	decodeFileDES(java.io.File input, java.io.File output, byte[] key) Decodes a single file using the DES algorithm.
static void	decodeFilePBE(java.io.File input, java.io.File output, char[] key) Decodes a single file using the PBE algorithm.
static byte[]	encodeDataDES(byte[] b, byte[] key) Encodes the data using the DES algorithm.
static byte[]	encodeDataPBE(byte[] b, char[] key) Encodes the data using the PBEWithMD5AndDES algorithm.
static void	encodeFileDES(java.io.File input, java.io.File output, byte[] key) Encodes a file using the DES algorithm
static void	encodeFilePBE(java.io.File input, java.io.File output, char[] key) Encodes a single file using the PBE algorithm.

Methods inherited from class java.lang.Object

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

Constructor Detail

DataCipherer

public DataCipherer()

Method Detail

encodeDataDES

public static byte[] encodeDataDES(byte[] b,
                                   byte[] key)
                            throws java.io.IOException,
                                   java.security.GeneralSecurityException

Encodes the data using the DES algorithm.

Parameters:

b - The data to encode

key - The key for the cipher algoritm, must be exactly 8 bytes long (required by the algorithm)

Returns:

The encoded data

Throws:

java.io.IOException

java.security.GeneralSecurityException

encodeDataPBE

public static byte[] encodeDataPBE(byte[] b,
                                   char[] key)
                            throws java.io.IOException,
                                   java.security.GeneralSecurityException

Encodes the data using the PBEWithMD5AndDES algorithm.

Parameters:

b - The data to encode

key - The key for the cipher algoritm

Returns:

The encoded data

Throws:

java.io.IOException

java.security.GeneralSecurityException

decodeDataDES

public static byte[] decodeDataDES(byte[] b,
                                   byte[] key)
                            throws java.io.IOException,
                                   java.security.GeneralSecurityException

Decodes the data using the DES algorithm.

Parameters:

b - The data to decode

key - The key for the cipher algoritm, must be exactly 8 bytes long (required by the algorithm)

Returns:

The decoded data

Throws:

java.io.IOException

java.security.GeneralSecurityException

decodeDataPBE

public static byte[] decodeDataPBE(byte[] b,
                                   char[] key)
                            throws java.io.IOException,
                                   java.security.GeneralSecurityException

Decodes the data using the PBEWithMD5AndDES algorithm.

Parameters:

b - The data to decode

key - The key for the cipher algoritm

Returns:

The decoded data

Throws:

java.io.IOException

java.security.GeneralSecurityException

encodeFileDES

public static void encodeFileDES(java.io.File input,
                                 java.io.File output,
                                 byte[] key)
                          throws java.io.IOException,
                                 java.security.GeneralSecurityException

Encodes a file using the DES algorithm

Parameters:

input - The input file

output - The output file

key - The key, must be exactly 8 bytes long (required by the algorithm)

Throws:

java.io.IOException

java.security.GeneralSecurityException

encodeFilePBE

public static void encodeFilePBE(java.io.File input,
                                 java.io.File output,
                                 char[] key)
                          throws java.io.IOException,
                                 java.security.GeneralSecurityException

Encodes a single file using the PBE algorithm.

Parameters:

input - The input (original) file

output - The output (coded) file

key - The key to use for the encoding

Throws:

java.io.IOException

java.security.GeneralSecurityException

See Also:

DMCipherOutputStreamPBE

decodeFileDES

public static void decodeFileDES(java.io.File input,
                                 java.io.File output,
                                 byte[] key)
                          throws java.io.IOException,
                                 java.security.GeneralSecurityException

Decodes a single file using the DES algorithm.

Parameters:

input - The input (coded) file

output - The output (decoded) file

key - The key to use for the encoding, must be exactly 8 bytes long (required by the algorithm)

Throws:

java.io.IOException

java.security.GeneralSecurityException

See Also:

DMCipherInputStreamDES

decodeFilePBE

public static void decodeFilePBE(java.io.File input,
                                 java.io.File output,
                                 char[] key)
                          throws java.io.IOException,
                                 java.security.GeneralSecurityException

Decodes a single file using the PBE algorithm.

Parameters:

input - The input (coded) file

output - The output (decoded) file

key - The key to use for the encoding

Throws:

java.io.IOException

java.security.GeneralSecurityException

See Also:

DMCipherInputStreamPBE

clone

public final java.lang.Object clone()
                             throws java.lang.CloneNotSupportedException

THIS METHOD IS NOT SUPPORTED!
The method always throws java.lang.CloneNotSupportedException

Returns:

-

Throws:

java.lang.CloneNotSupportedException - The exception is always thrown