SP80090DRBG (Bouncy Castle Library 1.68 API Specification)

All Known Implementing Classes:

CTRSP800DRBG, DualECSP800DRBG, HashSP800DRBG, HMacSP800DRBG
```
public interface SP80090DRBG
```
Interface to SP800-90A deterministic random bit generators.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`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
```
int getBlockSize()
```
    Return the block size of the DRBG.
    
    Returns:
    
    the block size (in bits) produced by each round of the DRBG.
  - generate
```
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
```
void reseed(byte[] additionalInput)
```
    Reseed the DRBG.
    
    Parameters:
    
    additionalInput - additional input to be added to the DRBG in this step.