Package org.bouncycastle.crypto.prng

Class ReversedWindowGenerator

java.lang.Object
org.bouncycastle.crypto.prng.ReversedWindowGenerator
All Implemented Interfaces:
RandomGenerator
public class ReversedWindowGenerator extends 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.

  • Constructor Details

    • ReversedWindowGenerator

      public ReversedWindowGenerator(RandomGenerator generator, int windowSize)

  • Method Details

    • 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.