org.bouncycastle.crypto.util

Class BasicEntropySourceProvider

java.lang.Object

org.bouncycastle.crypto.util.BasicEntropySourceProvider

All Implemented Interfaces:

EntropySourceProvider

public class BasicEntropySourceProvider
extends java.lang.Object
implements EntropySourceProvider

An EntropySourceProvider where entropy generation is based on a SecureRandom output using SecureRandom.generateSeed() in the case of a JDK SecureRandom or SecureRandom.nextBytes() in the case of a FipsSecureRandom, or a GeneralSecureRandom.

Constructor Summary

Constructors

Constructor and Description
BasicEntropySourceProvider(java.security.SecureRandom random, boolean isPredictionResistant) Create a entropy source provider based on the passed in SecureRandom.

Method Summary

Modifier and Type	Method and Description
EntropySource	get(int bitsRequired) Return an entropy source that will create bitsRequired bits of entropy on each invocation of getEntropy().

Methods inherited from class java.lang.Object

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

Constructor Detail

BasicEntropySourceProvider

public BasicEntropySourceProvider(java.security.SecureRandom random,
                                  boolean isPredictionResistant)

Create a entropy source provider based on the passed in SecureRandom.

Parameters:

random - the SecureRandom to base EntropySource construction on.

isPredictionResistant - boolean indicating if the SecureRandom is based on prediction resistant entropy or not (true if it is).

Method Detail

get

public EntropySource get(int bitsRequired)

Return an entropy source that will create bitsRequired bits of entropy on each invocation of getEntropy().

Specified by:

get in interface EntropySourceProvider

Parameters:

bitsRequired - size (in bits) of entropy to be created by the provided source.

Returns:

an EntropySource that generates bitsRequired bits of entropy on each call to its getEntropy() method.