Class ChaCha20ParameterSpec

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
External Specifications

  • 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 Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    Modifier and Type
    Method
    Description
    protected Object
    clone()
    Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
    boolean
    equals(Object o)
    Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
    protected void
    finalize()
    Deprecated, for removal: This API element is subject to removal in a future version.
    May cause performance issues, deadlocks and hangs.
    final Class<? extends Object>
    getClass()
    Answers the unique instance of java.lang.Class which represents the class of the receiver.
    int
    hashCode()
    Answers an integer hash code for the receiver.
    final void
    notify()
    Causes one thread which is waiting on the receiver to be made ready to run.
    final void
    notifyAll()
    Causes all threads which are waiting on the receiver to be made ready to run.
    String
    toString()
    Answers a string containing a concise, human-readable description of the receiver.
    final void
    wait()
    Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
    final void
    wait(long time)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
    final void
    wait(long time, int frac)
    Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

  • Constructor Details

    • 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 Details

    • 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