ChaCha20ParameterSpec (Java SE 12 & JDK 12 )

java.lang.Object
- javax.crypto.spec.ChaCha20ParameterSpec

All Implemented Interfaces:

AlgorithmParameterSpec
```
public final class ChaCha20ParameterSpec
extends Object
implements AlgorithmParameterSpec
```
This class specifies the parameters used with the ChaCha20 algorithm.
The parameters consist of a 12-byte nonce and an initial counter value expressed as a 32-bit integer.
This class can be used to initialize a Cipher object that implements the ChaCha20 algorithm.

Since:

11

- Constructor Summary
  
  Constructors
  Constructor Description
  
  ChaCha20ParameterSpec(byte[] nonce, int counter)
  Constructs a parameter set for ChaCha20 from the given nonce and counter.
- Method Summary
  
  Modifier and Type Method Description
  
  int getCounter()
  Returns the configured counter value.
  
  byte[] getNonce()
  Returns the nonce value.
  - Methods declared in class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ChaCha20ParameterSpec
```
public ChaCha20ParameterSpec(byte[] nonce,
                             int counter)
```
    Constructs a parameter set for ChaCha20 from the given nonce and counter.
    
    Parameters:
    
    nonce - a 12-byte nonce value
    
    counter - the initial counter value
    
    Throws:
    
    NullPointerException - if nonce is null
    
    IllegalArgumentException - if nonce is not 12 bytes in length
- Method Detail
  - getNonce
```
public byte[] getNonce()
```
    Returns the nonce value.
    
    Returns:
    
    the nonce value. This method returns a new array each time this method is called.
  - getCounter
```
public int getCounter()
```
    Returns the configured counter value.
    
    Returns:
    
    the counter value