de.flexiprovider.common.mode
Class ModeParameterGenerator

java.lang.Object
  |
  +--java.security.AlgorithmParameterGeneratorSpi
        |
        +--de.flexiprovider.api.parameters.AlgorithmParameterGenerator
              |
              +--de.flexiprovider.common.mode.ModeParameterGenerator

public class ModeParameterGenerator

extends AlgorithmParameterGenerator

This class is used to generate initialization vectors (IVs) used by the modes CBC, CFB, OFB, and CTR.

Author:

Martin Döring

Constructor Summary

ModeParameterGenerator()

Method Summary

AlgorithmParameterSpec	generateParameters() Generate a new IV using the length and source of randomness specified during initialization.
protected AlgorithmParameters	getAlgorithmParameters()
void	init(AlgorithmParameterSpec genParams, SecureRandom random) Initialize the parameter generator with parameters and a source of randomness.
void	init(int ivLength, SecureRandom random) Initialize the parameter generator with the desired length of the IV in bytes and the source of randomness used to generate the IV.

Methods inherited from class de.flexiprovider.api.parameters.AlgorithmParameterGenerator

engineGenerateParameters, engineInit, engineInit

Methods inherited from class java.lang.Object

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

Constructor Detail

ModeParameterGenerator

public ModeParameterGenerator()

Method Detail

getAlgorithmParameters

protected AlgorithmParameters getAlgorithmParameters()

Overrides:

getAlgorithmParameters in class AlgorithmParameterGenerator

Returns:

an instance of the AlgorithmParameters class corresponding to the generated parameters

init

public void init(AlgorithmParameterSpec genParams,
                 SecureRandom random)
          throws InvalidAlgorithmParameterException

Initialize the parameter generator with parameters and a source of randomness. If the parameters are null, the default parameters are used.

Overrides:

init in class AlgorithmParameterGenerator

Parameters:

genParams - the parameters

random - the source of randomness

Throws:

InvalidAlgorithmParameterException - if the parameters are not an instance of ModeParamGenParameterSpec.

init

public void init(int ivLength,
                 SecureRandom random)

Initialize the parameter generator with the desired length of the IV in bytes and the source of randomness used to generate the IV.

Overrides:

init in class AlgorithmParameterGenerator

Parameters:

ivLength - the length of the IV in bytes

random - the source of randomness

generateParameters

public AlgorithmParameterSpec generateParameters()

Generate a new IV using the length and source of randomness specified during initialization.

Overrides:

generateParameters in class AlgorithmParameterGenerator

Returns:

the generated IV encapsulated in an instance of ModeParameterSpec