Package org.bouncycastle.crypto.prng

Class X931SecureRandomBuilder

java.lang.Object
org.bouncycastle.crypto.prng.X931SecureRandomBuilder
public class X931SecureRandomBuilder extends Object

  • Constructor Details

    • X931SecureRandomBuilder

      public X931SecureRandomBuilder()
      Basic constructor, creates a builder using an EntropySourceProvider based on the default SecureRandom with predictionResistant set to false.

      Any SecureRandom created from a builder constructed like this will make use of input passed to SecureRandom.setSeed() if the default SecureRandom does for its generateSeed() call.

    • X931SecureRandomBuilder

      public X931SecureRandomBuilder(SecureRandom entropySource, boolean predictionResistant)
      Construct a builder with an EntropySourceProvider based on the passed in SecureRandom and the passed in value for prediction resistance.

      Any SecureRandom created from a builder constructed like this will make use of input passed to SecureRandom.setSeed() if the passed in SecureRandom does for its generateSeed() call.

      Parameters:
      entropySource -
      predictionResistant -

    • X931SecureRandomBuilder

      public X931SecureRandomBuilder(EntropySourceProvider entropySourceProvider)
      Create a builder which makes creates the SecureRandom objects from a specified entropy source provider.

      Note: If this constructor is used any calls to setSeed() in the resulting SecureRandom will be ignored.

      Parameters:
      entropySourceProvider - a provider of EntropySource objects.

  • Method Details

    • setDateTimeVector

      public X931SecureRandomBuilder setDateTimeVector(byte[] dateTimeVector)

    • build

      public X931SecureRandom build(BlockCipher engine, KeyParameter key, boolean predictionResistant)
      Construct a X9.31 secure random generator using the passed in engine and key. If predictionResistant is true the generator will be reseeded on each request.
      Parameters:
      engine - a block cipher to use as the operator.
      key - the block cipher key to initialise engine with.
      predictionResistant - true if engine to be reseeded on each use, false otherwise.
      Returns:
      a SecureRandom.