Class HKDFParameterSpec.Expand

java.lang.Object

javax.crypto.spec.HKDFParameterSpec.Expand

All Implemented Interfaces:: AlgorithmParameterSpec, HKDFParameterSpec

Enclosing interface:: HKDFParameterSpec

public static final class HKDFParameterSpec.Expand extends Object implements HKDFParameterSpec

Defines the input parameters of an Expand operation as defined in RFC 5869.

Since:: 25

Nested Class Summary

Nested classes/interfaces declared in interface HKDFParameterSpec

HKDFParameterSpec.Builder, HKDFParameterSpec.Expand, HKDFParameterSpec.Extract, HKDFParameterSpec.ExtractThenExpand

Modifier and Type	Interface	Description
`static final class`	`HKDFParameterSpec.Builder`	This `Builder` builds `Extract` and `ExtractThenExpand` objects.
`static final class`	`HKDFParameterSpec.Expand`	Defines the input parameters of an Expand operation as defined in RFC 5869.
`static final class`	`HKDFParameterSpec.Extract`	Defines the input parameters of an Extract operation as defined in RFC 5869.
`static final class`	`HKDFParameterSpec.ExtractThenExpand`	Defines the input parameters of an Extract-then-Expand operation as defined in RFC 5869.

Method Summary

Modifier and Type	Method	Description
`byte[]`	`info()`	Returns the optional context and application specific information.
`int`	`length()`	Returns the length of the output keying material.
`SecretKey`	`prk()`	Returns the pseudorandom key (PRK).

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.

Method Details

prk

public SecretKey prk()

Returns the pseudorandom key (PRK).

Returns:: the pseudorandom key

info

public byte[] info()

Returns the optional context and application specific information.

Returns:: a clone of the optional context and application specific information, or null if not specified

length

public int length()

Returns the length of the output keying material.

Returns:: the length of the output keying material

© 1993, 2025, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.