ibm.security.internal.spec

Class ChaCha20ParameterSpec

java.lang.Object

ibm.security.internal.spec.ChaCha20ParameterSpec

All Implemented Interfaces:

java.security.spec.AlgorithmParameterSpec

public final class ChaCha20ParameterSpec
extends java.lang.Object
implements java.security.spec.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:

1.8

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
int	getCounter() Returns the configured counter value.
byte[]	getNonce() Returns the nonce value.

Methods inherited from 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:

java.lang.NullPointerException - if nonce is null

java.lang.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