org.bouncycastle.crypto.prng.drbg
Interface SP80090DRBG

All Known Implementing Classes:

CTRSP800DRBG, DualECSP800DRBG, HashSP800DRBG, HMacSP800DRBG

public interface SP80090DRBG

Interface to SP800-90A deterministic random bit generators.

Method Summary

int	generate(byte[] output, byte[] additionalInput, boolean predictionResistant) Populate a passed in array with random data.
int	getBlockSize() Return the block size of the DRBG.
void	reseed(byte[] additionalInput) Reseed the DRBG.

Method Detail

getBlockSize

public int getBlockSize()

Return the block size of the DRBG.

Returns:

the block size (in bits) produced by each round of the DRBG.

generate

public int generate(byte[] output,
                    byte[] additionalInput,
                    boolean predictionResistant)

Populate a passed in array with random data.

Parameters:

output - output array for generated bits.

additionalInput - additional input to be added to the DRBG in this step.

predictionResistant - true if a reseed should be forced, false otherwise.

Returns:

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

reseed

public void reseed(byte[] additionalInput)

Reseed the DRBG.

Parameters:

additionalInput - additional input to be added to the DRBG in this step.