javax.crypto.spec
Class DESedeKeySpec

java.lang.Object
  |
  +--javax.crypto.spec.DESedeKeySpec

All Implemented Interfaces:

KeySpec

public class DESedeKeySpec

extends Object

implements KeySpec

DES-EDE key specification.

Attention: This is not a SUN implementation!

This class has been developed by IAIK according to the documentation publically available.
For SUNīs documentation of this class see http://java.sun.com/security/JCE1.2/spec/apidoc/index.html

This class represents a DES-EDE (TRIPLE DES) key specification. A key specification is a transparent representation of the key material constituting the key.

Version:

File Revision 14

See Also:

KeySpec

Field Summary

static int

DES_EDE_KEY_LEN

Constructor Summary

DESedeKeySpec(byte[] key)
Creates a DES-EDE key specification by using the first 24 bytes of the supplied byte array as the DES-EDE key.

DESedeKeySpec(byte[] key, int offset)
Creates a DES-EDE key specification by using 24 bytes of the supplied byte array as DES-EDE key, beginning at the given offset.

Method Summary

byte[]	getKey() Returns the inherent DES-EDE key as byte representation.
static boolean	isParityAdjusted(byte[] key, int offset) Checks if the DES-EDE key, supplied in a byte array beginning at the given offset, is parity-adjusted.

Methods inherited from class java.lang.Object

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

Field Detail

DES_EDE_KEY_LEN

public static final int DES_EDE_KEY_LEN

Constructor Detail

DESedeKeySpec

public DESedeKeySpec(byte[] key)
              throws InvalidKeyException

Creates a DES-EDE key specification by using the first 24 bytes of the supplied byte array as the DES-EDE key.

Parameters:

key - the byte array holding the DES-EDE key

Throws:

InvalidKeyException - if the given key is shorter than 24 bytes

DESedeKeySpec

public DESedeKeySpec(byte[] key,
                     int offset)
              throws InvalidKeyException

Creates a DES-EDE key specification by using 24 bytes of the supplied byte array as DES-EDE key, beginning at the given offset.

Parameters:

key - the byte array holding the DES-EDE key

offset - the offset indicating the start position within the input key byte array

Throws:

InvalidKeyException - if the given key, beginning at offset, is shorter than 24 bytes

Method Detail

getKey

public byte[] getKey()

Returns the inherent DES-EDE key as byte representation.

Returns:

the DES-EDE key

isParityAdjusted

public static boolean isParityAdjusted(byte[] key,
                                       int offset)
                                throws InvalidKeyException

Checks if the DES-EDE key, supplied in a byte array beginning at the given offset, is parity-adjusted.

Parameters:

key - the byte array holding the DES-EDE key

offset - the offset indicating the start position within the input key byte array

Returns:

true if the given DES-EDE key is parity-adjusted, false otherwise

Throws:

InvalidKeyException - if the given key material, beginning at offset, is shorter than 24 bytes