de.cscc.crypto.provider.spec
Class DES1KeySpec

java.lang.Object
  de.cscc.crypto.provider.spec.DES1KeySpec

All Implemented Interfaces:

Cloneable, DESKeySpec, KeySpec

public class DES1KeySpec

extends Object

implements DESKeySpec, Cloneable

DES secret key specification (56 bit or 64 bit with parity) class.

This class is immutable.

Version:

$Revision: 1.10 $

Author:

Uwe Günther

Constructor Summary

DES1KeySpec(byte[] key)
Creates a new DES1KeySpec from a 16 bytes long byte array.

DES1KeySpec(byte[] key, int offset)
Creates a new DES1KeySpec from a 16 bytes long byte array.

DES1KeySpec(DES1KeySpec key)
Creates a new DES1KeySpec 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[8].
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

DES1KeySpec

public DES1KeySpec(byte[] key)
            throws InvalidKeyException

Creates a new DES1KeySpec from a 16 bytes long byte array. We use the first 8 bytes in key as the key material for the DES key. The bytes that constitute the two DES keys are those between key[0] and key[8] inclusive.

Parameters:

key - the buffer with the DES keys.

Throws:

InvalidKeyException - if the given key material is shorter than 8 bytes or the key is weak or semi weak.

DES1KeySpec

public DES1KeySpec(byte[] key,
                   int offset)
            throws InvalidKeyException

Creates a new DES1KeySpec 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 8 bytes or the key is weak or semi weak.

DES1KeySpec

public DES1KeySpec(DES1KeySpec key)

Creates a new DES1KeySpec 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. This method is supported for the benefit of hashtables such as those provided by java.util.Hashtable.

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[8].

Specified by:

getKey in interface DESKeySpec

Returns:

the DES Key as byte[8].