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org.bouncycastle.crypto.prng

public Class X931RNG

Class Inheritance

extends Object

java.lang.Object
org.bouncycastle.crypto.prng.X931RNG

Imports

org.bouncycastle.crypto.BlockCipher

Field Summary

Modifier and Type	Field and Description
private static final int	BLOCK128_MAX_BITS_REQUEST
private static final long	BLOCK128_RESEED_MAX
private static final int	BLOCK64_MAX_BITS_REQUEST
private static final long	BLOCK64_RESEED_MAX
private final byte[]	DT
private final BlockCipher	engine
private final EntropySource	entropySource
private final byte[]	I
private final byte[]	R
private long	reseedCounter
private byte[]	V

Constructor Summary

Access	Constructor and Description
public	X931RNG(BlockCipher engine, byte[] dateTimeVector, EntropySource entropySource)

Method Summary

Modifier and Type	Method and Description
pack-priv int	Returns: number of bits generated, -1 if a reseed required. generate(byte[] output array for generated bits. output, boolean true if a reseed should be forced, false otherwise. predictionResistant) Populate a passed in array with random data.
pack-priv EntropySource	getEntropySource()
private void	increment(byte[] val)
private static boolean	isTooLarge(byte[] bytes, int maxBytes)
private void	process(byte[] res, byte[] a, byte[] b)
pack-priv void	reseed() Reseed the RNG.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

BLOCK128_MAX_BITS_REQUEST	back to summary
private static final int BLOCK128_MAX_BITS_REQUEST

BLOCK128_RESEED_MAX	back to summary
private static final long BLOCK128_RESEED_MAX

BLOCK64_MAX_BITS_REQUEST	back to summary
private static final int BLOCK64_MAX_BITS_REQUEST

BLOCK64_RESEED_MAX	back to summary
private static final long BLOCK64_RESEED_MAX

DT	back to summary
private final byte[] DT

engine	back to summary
private final BlockCipher engine

entropySource	back to summary
private final EntropySource entropySource

I	back to summary
private final byte[] I

R	back to summary
private final byte[] R

reseedCounter	back to summary
private long reseedCounter

V	back to summary
private byte[] V

Constructor Detail

X931RNG	back to summary
public X931RNG(BlockCipher engine, byte[] dateTimeVector, EntropySource entropySource)

Method Detail

generate

back to summary

pack-priv int generate(byte[] output, boolean predictionResistant)

Populate a passed in array with random data.

Parameters

output:byte[]: output array for generated bits.
predictionResistant:boolean: true if a reseed should be forced, false otherwise.

Returns:int

number of bits generated, -1 if a reseed required.

getEntropySource	back to summary
pack-priv EntropySource getEntropySource()

increment	back to summary
private void increment(byte[] val)

isTooLarge	back to summary
private static boolean isTooLarge(byte[] bytes, int maxBytes)

process	back to summary
private void process(byte[] res, byte[] a, byte[] b)

reseed	back to summary
pack-priv void reseed() Reseed the RNG.