de.cscc.crypto.provider.spec
Class DESede2KeySpec

java.lang.Object
  de.cscc.crypto.provider.spec.DESede2KeySpec

All Implemented Interfaces:

Cloneable, DESKeySpec, KeySpec

public class DESede2KeySpec

extends Object

implements DESKeySpec, Cloneable

2 Key Triple DES secret key specification (112 bit or 128 bit with parity) class.

This class is immutable.

Version:

$Revision: 1.10 $

Author:

Uwe Günther

Constructor Summary

DESede2KeySpec(byte[] key)
Creates a new DESede2KeySpec from a 16 bytes long byte array.

DESede2KeySpec(byte[] key, int offset)
Creates a new DESede2KeySpec from a 16 bytes long byte array .

DESede2KeySpec(DESede2KeySpec key)
Creates a new DESede2KeySpec from an existing one.

Method Summary

Object	clone() Creates and returns a deep copy of this object.
boolean	equals(Object obj) Indicates whether some other object is "equal to" this one.
byte[]	getKey() Get the DES Key as byte[16].
int	hashCode() Returns a hash code value for the object.
String	toString() Returns a string representation of the object.

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

DESede2KeySpec

public DESede2KeySpec(byte[] key)
               throws InvalidKeyException

Creates a new DESede2KeySpec from a 16 bytes long byte array. We use the first 16 bytes in key as the key material for the DES key. The first (leftmost) DES key (key[0] to key[7]) is key1 and the second (rightmost) DES key (key[8] to key[15]) is key2.

Parameters:

key - the buffer with the two DES keys.

Throws:

InvalidKeyException - if the given key material is shorter than 16 bytes or the key is weak or semi weak.

DESede2KeySpec

public DESede2KeySpec(byte[] key,
                      int offset)
               throws InvalidKeyException

Creates a new DESede2KeySpec from a 16 bytes long byte array .

Parameters:

key - the buffer with the DES keys.

offset - the offset in key, where the key starts.

Throws:

InvalidKeyException - if the given key material is shorter than 16 bytes or the key is weak or semi weak.

DESede2KeySpec

public DESede2KeySpec(DESede2KeySpec key)

Creates a new DESede2KeySpec from an existing one.

Parameters:

key - DesKeySpec object with a key.

Method Detail

clone

public Object clone()
             throws CloneNotSupportedException

Creates and returns a deep copy of this object.

Returns:

a clone of this instance.

Throws:

CloneNotSupportedException - if the object's class does not support the Cloneable interface. Subclasses that override the clone method can also throw this exception to indicate that an instance cannot be cloned.

See Also:

Cloneable

equals

public boolean equals(Object obj)

Indicates whether some other object is "equal to" this one.

Parameters:

obj - the reference object with which to compare.

Returns:

true if this object is the same as the obj argument; false otherwise.

See Also:

hashCode(), Hashtable

hashCode

public int hashCode()

Returns a hash code value for the object.

Returns:

a hash code value for this object.

See Also:

equals(java.lang.Object), Hashtable

toString

public String toString()

Returns a string representation of the object.

Returns:

a string representation of the object.

getKey

public byte[] getKey()

Get the DES Key as byte[16].

Specified by:

getKey in interface DESKeySpec

Returns:

the DES Key as byte[16].