Type0RaesOutputStream (TrueZIP Driver ZIP.RAES (TZP) 7.1 API)

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TrueZIP Driver ZIP.RAES (TZP) 7.1

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de.schlichtherle.truezip.crypto.raes
Class Type0RaesOutputStream

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

All Implemented Interfaces:: Closeable, Flushable

@NotThreadSafe @DefaultAnnotation(value=edu.umd.cs.findbugs.annotations.NonNull.class) class Type0RaesOutputStream
extends RaesOutputStream
extends RaesOutputStream

Writes a type 0 RAES file.

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 Type0RaesParameters.KeyStrength`	`keyStrength` The key strength.
`private Mac`	`klac` The cipher Key and cipher text Length Authentication Code (KLAC).
`private Mac`	`mac` The Message Authentication Code (MAC).
`private static SecureRandom`	`shaker`
`private long`	`start` The offset where the encrypted application data starts.

Fields inherited from class de.schlichtherle.truezip.crypto.CipherOutputStream
`cipher`

Fields inherited from class de.schlichtherle.truezip.io.DecoratingOutputStream
`delegate`

Constructor Summary
`Type0RaesOutputStream(OutputStream out, Type0RaesParameters param)`

Method Summary
`void`	`close()` Closes this output stream and releases any resources associated with it.
`Type0RaesParameters.KeyStrength`	`getKeyStrength()` Returns the key strength which is actually used to encrypt the data of the RAES file.

Methods inherited from class de.schlichtherle.truezip.crypto.raes.RaesOutputStream
`getInstance, klac`

Methods inherited from class de.schlichtherle.truezip.crypto.CipherOutputStream
`finish, write, write`

Methods inherited from class de.schlichtherle.truezip.io.DecoratingOutputStream
`flush, toString, write`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

shaker

private static final SecureRandom shaker

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

keyStrength

private final Type0RaesParameters.KeyStrength keyStrength

The key strength.

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 param)
                throws IOException

Throws:: IOException

Method Detail

getKeyStrength

public Type0RaesParameters.KeyStrength getKeyStrength()

Description copied from class: RaesOutputStream

Returns the key strength which is actually used to encrypt the data of the RAES file.

Specified by:: getKeyStrength 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 DecoratingOutputStream.delegate and the cipher CipherOutputStream.cipher.

Specified by:: close in interface Closeable
Overrides:: close in class CipherOutputStream

Throws:: IOException - If an I/O error occurs.