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()
    Creates and returns a copy of this object.
    boolean
    equals(Object obj)
    Indicates whether some other object is "equal to" this one.
    protected void
    finalize()
    Deprecated, for removal: This API element is subject to removal in a future version.
    Finalization is deprecated and subject to removal in a future release.
    final Class<?>
    getClass()
    Returns the runtime class of this Object.
    int
    hashCode()
    Returns a hash code value for this 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()
    Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
    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(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.

  • 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