Class BaseKDFBytesGenerator

  • All Implemented Interfaces:
    DerivationFunction
    Direct Known Subclasses:
    KDF2BytesGenerator

    public class BaseKDFBytesGenerator
    extends java.lang.Object
    implements DerivationFunction
    Basic KDF generator for derived keys and ivs as defined by IEEE P1363a/ISO 18033
    This implementation is based on ISO 18033/P1363a.
    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      protected BaseKDFBytesGenerator​(int counterStart, Digest digest)
      Construct a KDF Parameters generator.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int generateBytes​(byte[] out, int outOff, int len)
      fill len bytes of the output buffer with bytes generated from the derivation function.
      Digest getDigest()
      return the underlying digest.
      void init​(DerivationParameters param)  
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Field Detail

      • counterStart

        private int counterStart
      • digest

        private Digest digest
      • shared

        private byte[] shared
      • iv

        private byte[] iv
    • Constructor Detail

      • BaseKDFBytesGenerator

        protected BaseKDFBytesGenerator​(int counterStart,
                                        Digest digest)
        Construct a KDF Parameters generator.

        Parameters:
        counterStart - value of counter.
        digest - the digest to be used as the source of derived keys.