de.fhg.igd.crypto
Class DESParameterGenerator

java.lang.Object
  java.security.AlgorithmParameterGeneratorSpi
      de.fhg.igd.crypto.DESParameterGenerator

public class DESParameterGenerator
extends AlgorithmParameterGeneratorSpi

This class generates parameters for DESede according to RFC 2311. Encoding and Decoding conforms to ASN.1/DER as set forth in said RFC. The IvParameterSpec and subclasses thereof are supported for initialising the parameters.

Version:

"$Id: DESParameterGenerator.java 1913 2007-08-08 02:41:53Z jpeters $"

Author:

Volker Roth

See Also:

DESParameters, AlgorithmParameterSpec

Field Summary

protected SecureRandom

rnd_ The source of randomness used to generate IVs.

Constructor Summary

DESParameterGenerator()

Method Summary

protected AlgorithmParameters	engineGenerateParameters() Generates the parameters.
protected void	engineInit(AlgorithmParameterSpec spec, SecureRandom random) Initializes this parameter generator with a set of algorithm-specific parameter generation values.
protected void	engineInit(int size, SecureRandom random) Initializes this parameter generator for a certain size and source of randomness.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

rnd_

protected SecureRandom rnd_

The source of randomness used to generate IVs.

Constructor Detail

DESParameterGenerator

public DESParameterGenerator()

Method Detail

engineInit

protected void engineInit(int size,
                          SecureRandom random)

Initializes this parameter generator for a certain size and source of randomness. This method does nothing.

Specified by:

engineInit in class AlgorithmParameterGeneratorSpi

Parameters:

size - the size (number of bits).

random - the source of randomness.

engineInit

protected void engineInit(AlgorithmParameterSpec spec,
                          SecureRandom random)
                   throws InvalidAlgorithmParameterException

Initializes this parameter generator with a set of algorithm-specific parameter generation values.

Specified by:

engineInit in class AlgorithmParameterGeneratorSpi

Parameters:

spec - The set of algorithm-specific parameter generation values.

random - the source of randomness.

Throws:

InvalidAlgorithmParameterException - if the given parameter generation values are inappropriate for this parameter generator.

engineGenerateParameters

protected AlgorithmParameters engineGenerateParameters()

Generates the parameters.

Specified by:

engineGenerateParameters in class AlgorithmParameterGeneratorSpi

Returns:

the new AlgorithmParameters object.