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org.bouncycastle.crypto.general

pack-priv Class X931RNG

extends Object
Class Inheritance
Imports
java.util.HashMap, .Map, org.bouncycastle.crypto.EntropySource, org.bouncycastle.crypto.internal.BlockCipher, org.bouncycastle.util.encoders.Hex

Field Summary

Modifier and TypeField 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 BlockCipher
engine

private EntropySource
entropySource

private final byte[]
I

private static final Map<String, byte[][]>
kats

private final byte[]
R

private long
reseedCounter

private byte[]
V

Constructor Summary

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

Method Summary

Modifier and TypeMethod 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.

public int

Returns:

the number of bits produced on each internal round of the DRBG.
getBlockSize()

Return the block size (in bits) of the DRBG.

private byte[]
getEntropy()

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:
cloneequalsfinalizegetClasshashCodenotifynotifyAlltoStringwaitwaitwait

Field Detail

BLOCK128_MAX_BITS_REQUESTback to summary
private static final int BLOCK128_MAX_BITS_REQUEST
BLOCK128_RESEED_MAXback to summary
private static final long BLOCK128_RESEED_MAX
BLOCK64_MAX_BITS_REQUESTback to summary
private static final int BLOCK64_MAX_BITS_REQUEST
BLOCK64_RESEED_MAXback to summary
private static final long BLOCK64_RESEED_MAX
DTback to summary
private final byte[] DT
engineback to summary
private BlockCipher engine
entropySourceback to summary
private EntropySource entropySource
Iback to summary
private final byte[] I
katsback to summary
private static final Map<String, byte[][]> kats
Rback to summary
private final byte[] R
reseedCounterback to summary
private long reseedCounter
Vback to summary
private byte[] V

Constructor Detail

X931RNGback to summary
public X931RNG(BlockCipher engine, byte[] dateTimeVector, EntropySource entropySource)

Method Detail

generateback 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.

getBlockSizeback to summary
public int getBlockSize()

Return the block size (in bits) of the DRBG.

Returns:int

the number of bits produced on each internal round of the DRBG.

getEntropyback to summary
private byte[] getEntropy()
incrementback to summary
private void increment(byte[] val)
isTooLargeback to summary
private static boolean isTooLarge(byte[] bytes, int maxBytes)
processback to summary
private void process(byte[] res, byte[] a, byte[] b)
reseedback to summary
pack-priv void reseed()

Reseed the RNG.