Package org.bouncycastle.crypto.prng

Class ReversedWindowGenerator

  • All Implemented Interfaces:
    RandomGenerator
    public class ReversedWindowGenerator
extends java.lang.Object
implements RandomGenerator
    Takes bytes generated by an underling RandomGenerator and reverses the order in each small window (of configurable size).

    Access to internals is synchronized so a single one of these can be shared.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void addSeedMaterial​(byte[] seed)
      Add more seed material to the generator.
      void addSeedMaterial​(long seed)
      Add more seed material to the generator.
      void nextBytes​(byte[] bytes)
      Fill bytes with random values.
      void nextBytes​(byte[] bytes, int start, int len)
      Fill part of bytes with random values.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • ReversedWindowGenerator

        public ReversedWindowGenerator​(RandomGenerator generator,
                               int windowSize)

    • Method Detail

      • addSeedMaterial

        public void addSeedMaterial​(byte[] seed)
        Add more seed material to the generator.
        Specified by:
        addSeedMaterial in interface RandomGenerator
        Parameters:
        seed - a byte array to be mixed into the generator's state.

      • addSeedMaterial

        public void addSeedMaterial​(long seed)
        Add more seed material to the generator.
        Specified by:
        addSeedMaterial in interface RandomGenerator
        Parameters:
        seed - a long value to be mixed into the generator's state.

      • nextBytes

        public void nextBytes​(byte[] bytes)
        Fill bytes with random values.
        Specified by:
        nextBytes in interface RandomGenerator
        Parameters:
        bytes - byte array to be filled.

      • nextBytes

        public void nextBytes​(byte[] bytes,
                      int start,
                      int len)
        Fill part of bytes with random values.
        Specified by:
        nextBytes in interface RandomGenerator
        Parameters:
        bytes - byte array to be filled.
        start - index to start filling at.
        len - length of segment to fill.