org.cryptimeleon.math.random

Class SecureRandomGeneratorImpl

java.lang.Object

org.cryptimeleon.math.random.SecureRandomGeneratorImpl

All Implemented Interfaces:

RandomGeneratorImpl

public class SecureRandomGeneratorImpl
extends java.lang.Object
implements RandomGeneratorImpl

A simple random generator implementation using SecureRandom instantiated from a given seed.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.security.SecureRandom	rng Java's cryptographically secure randomness generator.

Constructor Summary

Constructors

Constructor and Description
SecureRandomGeneratorImpl()

Method Summary

Modifier and Type	Method and Description
boolean	getRandomBit()
byte[]	getRandomBytes(int l) Returns random byte array of given length.
java.math.BigInteger	getRandomPrime(int bitlength) Generates a random prime number from the interval \([2^{n-1}, 2^n-1]\).

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.cryptimeleon.math.random.RandomGeneratorImpl

getRandomNumber, getRandomNumber, getRandomNumberOfBitlength

Field Detail

rng

protected java.security.SecureRandom rng

Java's cryptographically secure randomness generator.

Constructor Detail

SecureRandomGeneratorImpl

public SecureRandomGeneratorImpl()

Method Detail

getRandomBytes

public byte[] getRandomBytes(int l)

Description copied from interface: RandomGeneratorImpl

Returns random byte array of given length.

Specified by:

getRandomBytes in interface RandomGeneratorImpl

Parameters:

l - length of resulting byte array

getRandomBit

public boolean getRandomBit()

Specified by:

getRandomBit in interface RandomGeneratorImpl

getRandomPrime

public java.math.BigInteger getRandomPrime(int bitlength)

Description copied from interface: RandomGeneratorImpl

Generates a random prime number from the interval \([2^{n-1}, 2^n-1]\).

Specified by:

getRandomPrime in interface RandomGeneratorImpl

Parameters:

bitlength - desired number of bits for the prime number

Returns:

a BigInteger that is probably prime