Class 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

Constructors

Constructor Description
ChaCha20ParameterSpec​(byte[] nonce, int counter)

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

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

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructors

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

Methods

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

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https://docs.oracle.com/en/java/javase/11/docs/api/java.base/javax/crypto/spec/ChaCha20ParameterSpec.html