Constructor Detail

• 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​(java.security.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 Detail

• 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.