org.bouncycastle.crypto.general

Class X931PRNG.Builder

java.lang.Object

org.bouncycastle.crypto.general.X931PRNG.Builder

Enclosing class:

X931PRNG

public static class X931PRNG.Builder
extends java.lang.Object

Builder for SecureRandom objects based on the X9.31 PRNG.

Method Summary

Modifier and Type	Method and Description
GeneralSecureRandom	build(SymmetricKey key, boolean predictionResistant) Construct a X9.31 secure random generator using the passed in engine and key.
X931PRNG.Builder	setDateTimeVector(byte[] dateTimeVector) Set the dateTime vector to be used with the generator.

Methods inherited from class java.lang.Object

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

Method Detail

setDateTimeVector

public X931PRNG.Builder setDateTimeVector(byte[] dateTimeVector)

Set the dateTime vector to be used with the generator. If this method is not called a vector is calculated based on System.currentTimeMillis().

Parameters:

dateTimeVector - a dateTime vector - needs to be the same size as the block size of the cipher.

Returns:

the current Builder instance.

build

public GeneralSecureRandom build(SymmetricKey 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:

key - the block cipher key to initialise algorithm implementation with.

predictionResistant - true if engine to be reseeded on each use, false otherwise.

Returns:

a SecureRandom.