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

org.bouncycastle.crypto.engines

## Class AESWrapEngine

- java.lang.Object
- - org.bouncycastle.crypto.engines.RFC3394WrapEngine
  - - org.bouncycastle.crypto.engines.AESWrapEngine

- All Implemented Interfaces:
    Wrapper

      public class AESWrapEngine
      extends RFC3394WrapEngine

  an implementation of the AES Key Wrapper from the NIST Key Wrap Specification.

  For further details see: https://csrc.nist.gov/encryption/kms/key-wrap.pdf.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `AESWrapEngine()` Create a regular AESWrapEngine specifying the encrypt for wrapping, decrypt for unwrapping.
    `AESWrapEngine(boolean useReverseDirection)` Create an AESWrapEngine where the underlying cipher is (optionally) set to decrypt for wrapping, encrypt for unwrapping.

  - ### Method Summary

    - ### Methods inherited from class org.bouncycastle.crypto.engines.RFC3394WrapEngine

      `getAlgorithmName, init, unwrap, wrap`

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

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

- - ### Constructor Detail

    - #### AESWrapEngine

          public AESWrapEngine()

      Create a regular AESWrapEngine specifying the encrypt for wrapping, decrypt for unwrapping.

    - #### AESWrapEngine

          public AESWrapEngine(boolean useReverseDirection)

      Create an AESWrapEngine where the underlying cipher is (optionally) set to decrypt for wrapping, encrypt for unwrapping.
      Parameters:
        `useReverseDirection` - true if underlying cipher should be used in decryption mode, false otherwise.