cryptix.provider.key

Class DES_EDE3KeyGenerator

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

Constructor Summary
DES_EDE3KeyGenerator()
Method Summary
protected booleanisWeak(byte[] key)
Returns true iff the first 24 bytes of key represent a weak or semi-weak Triple DES key.

Constructor Detail

DES_EDE3KeyGenerator

public DES_EDE3KeyGenerator()

Method Detail

isWeak

protected boolean isWeak(byte[] key)
Returns true iff the first 24 bytes of key represent a weak or semi-weak Triple DES key.