Package jadex.ipc.impl.security.random

Class ChaCha20Random

java.lang.Object

java.util.Random

java.security.SecureRandom

jadex.ipc.impl.security.random.ChaCha20Random

All Implemented Interfaces:

Serializable, RandomGenerator

public class ChaCha20Random
extends SecureRandom

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.random.RandomGenerator

RandomGenerator.ArbitrarilyJumpableGenerator, RandomGenerator.JumpableGenerator, RandomGenerator.LeapableGenerator, RandomGenerator.SplittableGenerator, RandomGenerator.StreamableGenerator

Field Summary

Fields

Modifier and Type	Field	Description
protected int[]	basestate	ChaCha base state
protected long	blockcount	Current block count.
protected IEntropySource	entropysource	Entropy source for seeding, use SSecurity.
protected int	outptr	Pointer to unused output.
protected byte[]	outputblock	The output block.

Constructor Summary

Constructors

Constructor	Description
ChaCha20Random()	Initializes the PRNG.
ChaCha20Random(byte[] initialseed)	Initializes the PRNG.
ChaCha20Random(IEntropySource seedrandom)	Initializes the PRNG.
ChaCha20Random(IEntropySource entropysource, byte[] initialseed)	Initializes the PRNG.

Method Summary

Modifier and Type	Method	Description
byte[]	generateSeed(int numbytes)	Generates a seed value from OS source.
protected void	nextBlock()	Generates the next ChaCha block.
void	nextBlock(byte[] outputblock)	Generate next block (64 bytes).
void	nextBytes(byte[] bytes)	Gets the next bytes.
int	nextInt()	Gets the next int.
long	nextLong()	Gets the next long.
void	reseed()	Reseeds the PRNG.
void	reseed(byte[] providedseed)	Reseeds the PRNG.

Methods inherited from class java.security.SecureRandom

getAlgorithm, getInstance, getInstance, getInstance, getInstance, getInstance, getInstance, getInstanceStrong, getParameters, getProvider, getSeed, next, nextBytes, reseed, setSeed, setSeed, toString

Methods inherited from class java.util.Random

doubles, doubles, doubles, doubles, ints, ints, ints, ints, longs, longs, longs, longs, nextBoolean, nextDouble, nextFloat, nextGaussian, nextInt

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.random.RandomGenerator

isDeprecated, nextDouble, nextDouble, nextExponential, nextFloat, nextFloat, nextGaussian, nextInt, nextLong, nextLong

Field Details

entropysource

protected IEntropySource entropysource

Entropy source for seeding, use SSecurity.

basestate

protected int[] basestate

ChaCha base state

blockcount

protected long blockcount

Current block count.

outputblock

protected byte[] outputblock

The output block.

outptr

protected int outptr

Pointer to unused output.

Constructor Details

ChaCha20Random

public ChaCha20Random()

Initializes the PRNG.

ChaCha20Random

public ChaCha20Random(IEntropySource seedrandom)

Initializes the PRNG.

ChaCha20Random

public ChaCha20Random(byte[] initialseed)

Initializes the PRNG.

ChaCha20Random

public ChaCha20Random(IEntropySource entropysource,
 byte[] initialseed)

Initializes the PRNG.

Method Details

nextLong

public long nextLong()

Gets the next long.

Specified by:

nextLong in interface RandomGenerator

Overrides:

nextLong in class Random

nextInt

public int nextInt()

Gets the next int.

Specified by:

nextInt in interface RandomGenerator

Overrides:

nextInt in class Random

nextBytes

public void nextBytes(byte[] bytes)

Gets the next bytes.

Specified by:

nextBytes in interface RandomGenerator

Overrides:

nextBytes in class SecureRandom

nextBlock

protected void nextBlock()

Generates the next ChaCha block.

reseed

public void reseed()

Reseeds the PRNG.

Overrides:

reseed in class SecureRandom

reseed

public void reseed(byte[] providedseed)

Reseeds the PRNG.

nextBlock

public void nextBlock(byte[] outputblock)

Generate next block (64 bytes).

Parameters:

outputblock - The block.

generateSeed

public byte[] generateSeed(int numbytes)

Generates a seed value from OS source.

Overrides:

generateSeed in class SecureRandom