Type0RaesOutputStream (TrueZIP Driver TZP (ZIP.RAES) 7.0-rc1 API)

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TrueZIP Driver TZP (ZIP.RAES) 7.0-rc1

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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

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 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 static SecureRandom`	`secureRandom`
`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.
`private static void`	`generateSalt(Digest digest, byte[] salt)`
`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.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

secureRandom

private static final SecureRandom secureRandom

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 param)
                throws NullPointerException,
                       IllegalArgumentException,
                       RaesKeyException,
                       IOException

Throws:: NullPointerException; IllegalArgumentException; RaesKeyException; IOException

Method Detail

generateSalt

private static void generateSalt(Digest digest,
                                 byte[] salt)

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 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.