sdsu.io
Class XorOutputStream

java.lang.Object
  |
  +--java.io.OutputStream
        |
        +--java.io.FilterOutputStream
              |
              +--sdsu.io.XorOutputStream

public class XorOutputStream

extends java.io.FilterOutputStream

XorOutputStream encodes it output by Xoring all input bytes with the byte mask given in the constructor. Use a XorInputStream to decode the output of XorOutputStream by givening them both the same mask in their constructors. XorInputStream and XorOutputStream can be used for a very weak form of encryption.

Version:

1.0 14 Feb 1998

Author:

Roger Whitney (whitney@cs.sdsu.edu)

Constructor Summary

XorOutputStream(java.io.OutputStream out, byte mask)

Method Summary

void	write(byte[] output, int offset, int length) Writes length bytes from the specified byte array starting at offset offset and Xor's each byte with the streams mask.
void	write(int output) Writes the specified byte and Xor's it with the streams mask.

Methods inherited from class java.io.FilterOutputStream

close, flush, write

Methods inherited from class java.lang.Object

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

Constructor Detail

XorOutputStream

public XorOutputStream(java.io.OutputStream out,
                       byte mask)

Method Detail

write

public void write(int output)
           throws java.io.IOException

Writes the specified byte and Xor's it with the streams mask.

Parameters:

output - the byte.

Throws:

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

Overrides:

write in class java.io.FilterOutputStream

write

public void write(byte[] output,
                  int offset,
                  int length)
           throws java.io.IOException

Writes length bytes from the specified byte array starting at offset offset and Xor's each byte with the streams mask.

Parameters:

output - the data.

offset - the start offset in the data.

length - the number of bytes to write.

Throws:

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

Overrides:

write in class java.io.FilterOutputStream