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:

External Specifications

Constructor Summary

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

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