ChaCha20ParameterSpec (Java SE 11 & JDK 11 ) (original) (raw)

• java.lang.Object

• • javax.crypto.spec.ChaCha20ParameterSpec

• All Implemented Interfaces:
  [AlgorithmParameterSpec](../../../java/security/spec/AlgorithmParameterSpec.html "interface in java.security.spec")

public final class ChaCha20ParameterSpec
extends Object
implements AlgorithmParameterSpec
This class specifies the parameters used with theChaCha20 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

  All Methods Instance Methods Concrete Methods

  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](../../../java/lang/Object.html "class in java.lang")  
     `[clone](../../../java/lang/Object.html#clone%28%29), [equals](../../../java/lang/Object.html#equals%28java.lang.Object%29), [finalize](../../../java/lang/Object.html#finalize%28%29), [getClass](../../../java/lang/Object.html#getClass%28%29), [hashCode](../../../java/lang/Object.html#hashCode%28%29), [notify](../../../java/lang/Object.html#notify%28%29), [notifyAll](../../../java/lang/Object.html#notifyAll%28%29), [toString](../../../java/lang/Object.html#toString%28%29), [wait](../../../java/lang/Object.html#wait%28%29), [wait](../../../java/lang/Object.html#wait%28long%29), [wait](../../../java/lang/Object.html#wait%28long,int%29)`

• • 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](../../../java/lang/NullPointerException.html "class in java.lang")` \- if `nonce` is `null`  
     `[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- 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

Report a bug or suggest an enhancement
For further API reference and developer documentation see the Java SE Documentation, which contains more detailed, developer-targeted descriptions with conceptual overviews, definitions of terms, workarounds, and working code examples.
Java is a trademark or registered trademark of Oracle and/or its affiliates in the US and other countries.
Copyright © 1993, 2025, Oracle and/or its affiliates, 500 Oracle Parkway, Redwood Shores, CA 94065 USA.
All rights reserved. Use is subject to license terms and the documentation redistribution policy.