KDF2BytesGenerator (Bouncy Castle Library 1.85 API Specification)
Date: 2026-07-12

org.bouncycastle.crypto.generators

## Class KDF2BytesGenerator

- java.lang.Object
- - org.bouncycastle.crypto.generators.BaseKDFBytesGenerator
  - - org.bouncycastle.crypto.generators.KDF2BytesGenerator

- All Implemented Interfaces:
    DerivationFunction, DigestDerivationFunction

      public class KDF2BytesGenerator
      extends BaseKDFBytesGenerator

  KDF2 generator for derived keys and ivs as defined by IEEE P1363a/ISO 18033
  This implementation is based on IEEE P1363/ISO 18033.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `KDF2BytesGenerator(Digest digest)` Construct a KDF2 bytes generator.

  - ### Method Summary

    - ### Methods inherited from class org.bouncycastle.crypto.generators.BaseKDFBytesGenerator

      `generateBytes, getDigest, init`

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

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

- - ### Constructor Detail

    - #### KDF2BytesGenerator

          public KDF2BytesGenerator(Digest digest)

      Construct a KDF2 bytes generator. Generates key material according to IEEE P1363 or ISO 18033 depending on the initialisation.

      Parameters:
        `digest` - the digest to be used as the source of derived keys.