Class KEM.Encapsulated

java.lang.Object

javax.crypto.KEM.Encapsulated

Enclosing class:: KEM

public static final class KEM.Encapsulated extends Object

This class specifies the return value of the encapsulate method of a Key Encapsulation Mechanism (KEM), which includes the shared secret (as a SecretKey), the key encapsulation message, and optional parameters.

Note: the key encapsulation message can be also referred to as ciphertext.

Since:

See Also:

Constructor Summary

Constructor	Description
`Encapsulated(SecretKey key, byte[] encapsulation, byte[] params)`	Constructs an `Encapsulated` object.

Method Summary

Modifier and Type	Method	Description
`byte[]`	`encapsulation()`	Returns the key encapsulation message.
`SecretKey`	`key()`	Returns the `SecretKey`.
`byte[]`	`params()`	Returns the optional parameters in a byte array.

Methods declared in class Object

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

Constructor Details

Encapsulated

public Encapsulated(SecretKey key, byte[] encapsulation, byte[] params)

Constructs an Encapsulated object.

Parameters:: key - the shared secret as a key, must not be null.; encapsulation - the key encapsulation message, must not be null. The contents of the array are copied to protect against subsequent modification.; params - optional parameters, can be null. The contents of the array are copied to protect against subsequent modification.
Throws:: NullPointerException - if key or encapsulation is null

Method Details

key

public SecretKey key()

Returns the SecretKey.

Returns:: the secret key

encapsulation

public byte[] encapsulation()

Returns the key encapsulation message.

Returns:: the key encapsulation message. A new copy of the byte array is returned.

params

public byte[] params()

Returns the optional parameters in a byte array.

Returns:: the optional parameters in a byte array or null if not specified. A new copy of the byte array is returned.

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https://docs.oracle.com/en/java/javase/25/docs/api/java.base/javax/crypto/KEM.Encapsulated.html