cryptix.provider.key
Class DES_EDE3KeyGenerator
java.lang.Object
|
+--xjava.security.KeyGenerator
|
+--cryptix.provider.key.RawKeyGenerator
|
+--cryptix.provider.key.DESKeyGenerator
|
+--cryptix.provider.key.DES_EDE3KeyGenerator
- All Implemented Interfaces:
- java.lang.Cloneable, ExtendedKeyGenerator, Parameterized
- public class DES_EDE3KeyGenerator
- extends DESKeyGenerator
A key generator for Triple DES with 3 independent DES keys.
A total of 24 bytes are generated, with a parity bit as the LSB of each
byte (i.e. there are 2^168 possible keys). The keys are encoded in the
order in which they are used for encryption. A Triple DES key is considered
weak if any of its constituent keys are weak, or if two or more of those
keys are equal, ignoring parity.
Copyright © 1997
Systemics Ltd on behalf of the
Cryptix Development Team.
All rights reserved.
$Revision: 1.2 $
- Since:
- Cryptix 2.2.0a, 2.2.2
- Author:
- David Hopwood, Raif Naffah
Method Summary |
protected boolean |
isWeak(byte[] key)
Returns true iff the first 24 bytes of key represent a weak
or semi-weak Triple DES key. |
Methods inherited from class xjava.security.KeyGenerator |
clone, engineGetParameter, engineSetParameter, getAlgorithm, getAlgorithms, getAlgorithms, getInstance, getInstance, getParameter, setParameter, toString |
Methods inherited from class java.lang.Object |
, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
DES_EDE3KeyGenerator
public DES_EDE3KeyGenerator()
isWeak
protected boolean isWeak(byte[] key)
- Returns true iff the first 24 bytes of key represent a weak
or semi-weak Triple DES key.
- Overrides:
isWeak
in class DESKeyGenerator