Class EncryptedOutputStream

java.lang.Object
  java.io.OutputStream
      java.io.FilterOutputStream
          EncryptedOutputStream

public class EncryptedOutputStream

extends FilterOutputStream

Field Summary

private int	blocksize
private byte[]	buf
private static boolean	DEBUG
private static int	DEFAULT_BUFFER_SIZE
private int	end
private Object	key
private static int	KEY_SIZE
private int	pos

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

EncryptedOutputStream(OutputStream out)
Create an EncryptedOutputStream with the default buffer size.

EncryptedOutputStream(OutputStream out, int bufsize)
Create an EncryptedOutputStream with a given buffer size.

Method Summary

void	close() Close the stream.
void	flush() Flush the buffer.
private Object	readKey() Read the key from the keyfile
void	write(byte[] b, int off, int len) Writes len bytes from the byte array starting at off
void	write(int b) Write a byte.
void	writeEncryptedBlock() Write an encrypted block to the output stream.

Methods inherited from class java.io.FilterOutputStream

write

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_BUFFER_SIZE

private static final int DEFAULT_BUFFER_SIZE

See Also:

Constant Field Values

KEY_SIZE

private static final int KEY_SIZE

See Also:

Constant Field Values

DEBUG

private static final boolean DEBUG

See Also:

Constant Field Values

buf

private byte[] buf

pos

private int pos

end

private int end

blocksize

private int blocksize

key

private Object key

Constructor Detail

EncryptedOutputStream

public EncryptedOutputStream(OutputStream out)
                      throws Exception

Create an EncryptedOutputStream with the default buffer size.

Parameters:

out - underlying output stream to encrypt.

EncryptedOutputStream

public EncryptedOutputStream(OutputStream out,
                             int bufsize)
                      throws Exception

Create an EncryptedOutputStream with a given buffer size.

Parameters:

out - underlying output stream to encrypt.

bufsize - the size of the internal buffer

Method Detail

write

public void write(int b)
           throws IOException

Write a byte.

Parameters:

b - byte to write.

Throws:

IOException

write

public void write(byte[] b,
                  int off,
                  int len)
           throws IOException

Writes len bytes from the byte array starting at off

Parameters:

b - the data

off - data offset

len - number of bytes to write

Throws:

IOException

writeEncryptedBlock

public void writeEncryptedBlock()
                         throws IOException

Write an encrypted block to the output stream.

Throws:

IOException

flush

public void flush()
           throws IOException

Flush the buffer.

Throws:

IOException

readKey

private Object readKey()
                throws Exception

Read the key from the keyfile

Returns:

a key object

Throws:

Exception

close

public void close()
           throws IOException

Close the stream. Calls flush() before closing.

Throws:

IOException