de.schlichtherle.crypto.io.raes
Class Type0RaesOutputStream

java.lang.Object
  java.io.OutputStream
      java.io.FilterOutputStream
          de.schlichtherle.crypto.io.CipherOutputStream
              de.schlichtherle.crypto.io.raes.RaesOutputStream
                  de.schlichtherle.crypto.io.raes.Type0RaesOutputStream

All Implemented Interfaces:

Closeable, Flushable

 class Type0RaesOutputStream
extends RaesOutputStream

Writes a type 0 RAES file.

Since:

TrueZIP 6.0

Version:

$Id: Type0RaesOutputStream.java 06f3ba684701 2010/11/04 01:15:55 christian $

Author:

Christian Schlichtherle

Field Summary

private boolean	closed Whether this stream has been closed or not.
private LEDataOutputStream	dos The low level data output stream.
(package private) static int	ITERATION_COUNT The iteration count for the derived keys of the cipher, KLAC and MAC.
private int	keyStrengthBits The actual key strength in bits.
private Mac	klac The cipher Key and cipher text Length Authentication Code (KLAC).
private Mac	mac The Message Authentication Code (MAC).
private long	start The offset where the encrypted application data starts.

Fields inherited from class de.schlichtherle.crypto.io.CipherOutputStream

cipher

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

Type0RaesOutputStream(OutputStream out, Type0RaesParameters parameters)

Method Summary

void	close() Closes this output stream and releases any resources associated with it.
int	getKeySizeBits() Returns the key size in bits which is actually used to encrypt or decrypt the data for this output stream.

Methods inherited from class de.schlichtherle.crypto.io.raes.RaesOutputStream

getInstance, klac

Methods inherited from class de.schlichtherle.crypto.io.CipherOutputStream

finish, write, write

Methods inherited from class java.io.FilterOutputStream

flush, write

Methods inherited from class java.lang.Object

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

Field Detail

ITERATION_COUNT

static final int ITERATION_COUNT

The iteration count for the derived keys of the cipher, KLAC and MAC.

See Also:

Constant Field Values

keyStrengthBits

private int keyStrengthBits

The actual key strength in bits.

mac

private Mac mac

The Message Authentication Code (MAC).

klac

private Mac klac

The cipher Key and cipher text Length Authentication Code (KLAC).

dos

private LEDataOutputStream dos

The low level data output stream. Used for writing the header and footer.

start

private long start

The offset where the encrypted application data starts.

closed

private boolean closed

Whether this stream has been closed or not.

Constructor Detail

Type0RaesOutputStream

Type0RaesOutputStream(OutputStream out,
                      Type0RaesParameters parameters)
                throws NullPointerException,
                       IllegalArgumentException,
                       RaesKeyException,
                       IOException

Throws:

NullPointerException

IllegalArgumentException

RaesKeyException

IOException

Method Detail

getKeySizeBits

public int getKeySizeBits()

Description copied from class: RaesOutputStream

Returns the key size in bits which is actually used to encrypt or decrypt the data for this output stream.

Specified by:

getKeySizeBits in class RaesOutputStream

close

public void close()
           throws IOException

Description copied from class: CipherOutputStream

Closes this output stream and releases any resources associated with it. This method calls CipherOutputStream.finish() and then closes and nullifies the underlying output stream FilterOutputStream.out and the cipher CipherOutputStream.cipher.

Specified by:

close in interface Closeable

Overrides:

close in class CipherOutputStream

Throws:

IOException - If an I/O error occurs.