cryptix.provider.key
Class DES_EDE3KeyGenerator
- Cloneable, ExtendedKeyGenerator, Parameterized
public class DES_EDE3KeyGenerator
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 $
protected boolean | isWeak(byte[] key)- Returns true iff the first 24 bytes of key represent a weak
or semi-weak Triple DES key.
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engineGenerateKey, generateKey, generateKey, getDefaultKeyLength, getMaximumKeyLength, getMinimumKeyLength, initialize, initialize, isValidKeyLength, isWeak, isWeakAllowed, setWeakAllowed |
clone, engineGetParameter, engineSetParameter, generateKey, getAlgorithm, getAlgorithms, getAlgorithms, getInstance, getInstance, getParameter, initialize, setParameter, toString |
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.
- isWeak in interface DESKeyGenerator