HQCKEMExtractor (Bouncy Castle Library 1.85 API Specification)
Date: 2026-07-12

org.bouncycastle.pqc.crypto.hqc

## Class HQCKEMExtractor

- java.lang.Object
- - org.bouncycastle.pqc.crypto.hqc.HQCKEMExtractor

- All Implemented Interfaces:
    EncapsulatedSecretExtractor

      public class HQCKEMExtractor
      extends java.lang.Object
      implements EncapsulatedSecretExtractor

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `HQCKEMExtractor(HQCPrivateKeyParameters privateKey)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `byte[]` | `extractSecret(byte[] encapsulation)` Extract the secret based on the recipient private key.
    `int` | `getEncapsulationLength()` Return the length in bytes of the encapsulation.

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### HQCKEMExtractor

          public HQCKEMExtractor(HQCPrivateKeyParameters privateKey)

  - ### Method Detail

    - #### extractSecret

          public byte[] extractSecret(byte[] encapsulation)

      Description copied from interface: `EncapsulatedSecretExtractor`
      Extract the secret based on the recipient private key.
      Specified by:
        `extractSecret` in interface `EncapsulatedSecretExtractor`
      Parameters:
        `encapsulation` - the encapsulated secret.

    - #### getEncapsulationLength

          public int getEncapsulationLength()

      Description copied from interface: `EncapsulatedSecretExtractor`
      Return the length in bytes of the encapsulation.
      Specified by:
        `getEncapsulationLength` in interface `EncapsulatedSecretExtractor`
      Returns:
        length in bytes of an encapsulation for this parameter set.