au.net.aba.crypto.provider
Class TwofishKeyGenerator
java.lang.Object
|
+--javax.crypto.KeyGeneratorSpi
|
+--au.net.aba.crypto.provider.TwofishKeyGenerator
- public class TwofishKeyGenerator
- extends KeyGeneratorSpi
This class is used for generating random Twofish keys. This class
should not be instantiated directly, instead use the
javax.crypto.KeyGenerator interface.
There is no AlgorithmParameterSpec class defined for Twofish so this
generator can only be initialised using the keysize,random
initialisation.
The default keysize is 128 bits, and may be up to 256 bits long.
Field Summary |
static java.lang.String |
ident
|
Method Summary |
protected SecretKey |
engineGenerateKey()
Generates a random secret key. |
protected void |
engineInit(java.security.spec.AlgorithmParameterSpec params,
java.security.SecureRandom random)
This method is not implemented as there is no AlgorithmParameterSpec
defined for Twofish. |
protected void |
engineInit(int strength,
java.security.SecureRandom random)
Initialises this key generator for a certain strength, using the
given source of randomness. |
protected void |
engineInit(java.security.SecureRandom random)
Initialises the key generator with the given random source. |
Methods inherited from class java.lang.Object |
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
ident
public static final java.lang.String ident
TwofishKeyGenerator
public TwofishKeyGenerator()
engineInit
protected void engineInit(java.security.spec.AlgorithmParameterSpec params,
java.security.SecureRandom random)
throws java.security.InvalidAlgorithmParameterException
- This method is not implemented as there is no AlgorithmParameterSpec
defined for Twofish. (Use one of the other initialisation methods!)
- Parameters:
params
- the algorithm parameter specs for this
generator.random
- a source of random numbers for this generator.- Throws:
- java.security.InvalidAlgorithmParameterException - An invalid
parameter specification is provided.
- Overrides:
- engineInit in class KeyGeneratorSpi
engineInit
protected void engineInit(int strength,
java.security.SecureRandom random)
- Initialises this key generator for a certain strength, using the
given source of randomness.
- Parameters:
strength
- the strength of the key. This is an
algorithm-specific metric specified in number of bits.random
- the source of randomness for this key generator- Overrides:
- engineInit in class KeyGeneratorSpi
engineInit
protected void engineInit(java.security.SecureRandom random)
- Initialises the key generator with the given random source.
- Parameters:
random
- a source of random numbers for this generator.- Overrides:
- engineInit in class KeyGeneratorSpi
engineGenerateKey
protected SecretKey engineGenerateKey()
- Generates a random secret key.
- Returns:
- a secret key representing a Twofish key.
- Overrides:
- engineGenerateKey in class KeyGeneratorSpi