ChaCha20ParameterSpec

public final class ChaCha20ParameterSpec
extends Object implements AlgorithmParameterSpec

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

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.

Summary

Public constructors
`ChaCha20ParameterSpec(byte[] nonce, int counter)` Constructs a parameter set for ChaCha20 from the given nonce and counter.

Public methods
`int`	`getCounter()` Returns the configured counter value.
`byte[]`	`getNonce()` Returns the nonce value.

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Added in API level 35

public ChaCha20ParameterSpec (byte[] nonce, 
                int counter)

Constructs a parameter set for ChaCha20 from the given nonce and counter.

Parameters
`nonce`	`byte`: a 12-byte nonce value
`counter`	`int`: the initial counter value

Throws
`NullPointerException`	if `nonce` is `null`
`IllegalArgumentException`	if `nonce` is not 12 bytes in length

Added in API level 35

public int getCounter ()

Returns the configured counter value.

Returns
`int`	the counter value

Added in API level 35

public byte[] getNonce ()

Returns the nonce value.

Returns
`byte[]`	the nonce value. This method returns a new array each time this method is called.