jadex.commons.security.random

Class ChaCha20Random

java.lang.Object

java.util.Random

java.security.SecureRandom

jadex.commons.security.random.ChaCha20Random

All Implemented Interfaces:

java.io.Serializable

public class ChaCha20Random
extends java.security.SecureRandom

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and 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 and 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 and 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, getInstanceStrong, getProvider, getSeed, next, setSeed, setSeed

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, toString, wait, wait, wait

Field Detail

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 Detail

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 Detail

nextLong

public long nextLong()

Gets the next long.

Overrides:

nextLong in class java.util.Random

nextInt

public int nextInt()

Gets the next int.

Overrides:

nextInt in class java.util.Random

nextBytes

public void nextBytes(byte[] bytes)

Gets the next bytes.

Overrides:

nextBytes in class java.security.SecureRandom

nextBlock

protected void nextBlock()

Generates the next ChaCha block.

reseed

public void reseed()

Reseeds the PRNG.

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 java.security.SecureRandom