org.cryptimeleon.math.random

Class RandomGenerator

java.lang.Object

org.cryptimeleon.math.random.RandomGenerator

public class RandomGenerator
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
static RandomGeneratorImpl	impl If you want to exchange the implementation used to generate randomness in this library, change the value of this variable.

Method Summary

Modifier and Type	Method and Description
static boolean	getRandomBit()
static byte[]	getRandomBytes(int l) Returns random byte array of given length.
static java.math.BigInteger	getRandomNonZeroNumber(java.math.BigInteger exclusiveUpperBound) Generates a uniformly random integer k with 1 <= k < exclusiveUpperBound
static java.math.BigInteger	getRandomNumber(java.math.BigInteger exclusiveUpperBound) Generates a uniformly random integer k with 0 <= k < exclusiveUpperBound
static java.math.BigInteger	getRandomNumber(java.math.BigInteger inclusiveLowerBound, java.math.BigInteger exclusiveUpperBound) Generates a uniformly random integer k with inclusiveLowerBound <= k < exclusiveUpperBound
static int	getRandomNumber(int exclusiveUpperBound) Generates a uniformly random integer k with 0 <= k < exclusiveUpperBound
static int	getRandomNumber(int inclusiveLowerBound, int exclusiveUpperBound) Generates a uniformly random integer k with inclusiveLowerBound <= k < exclusiveUpperBound.
static long	getRandomNumber(long exclusiveUpperBound) Generates a uniformly random integer k with 0 <= k < exclusiveUpperBound
static long	getRandomNumber(long inclusiveLowerBound, long exclusiveUpperBound) Generates a uniformly random integer k with inclusiveLowerBound <= k < exclusiveUpperBound.
static java.math.BigInteger	getRandomNumberOfBitlength(int bitlength) Generates a random integer k with \(0 \leq k < 2^{\text{bitlength}}-1\).
static 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

Field Detail

impl

public static RandomGeneratorImpl impl

If you want to exchange the implementation used to generate randomness in this library, change the value of this variable.

Method Detail

getRandomNumber

public static java.math.BigInteger getRandomNumber(java.math.BigInteger exclusiveUpperBound)

Generates a uniformly random integer k with 0 <= k < exclusiveUpperBound

getRandomNumber

public static long getRandomNumber(long exclusiveUpperBound)

Generates a uniformly random integer k with 0 <= k < exclusiveUpperBound

getRandomNumber

public static int getRandomNumber(int exclusiveUpperBound)

Generates a uniformly random integer k with 0 <= k < exclusiveUpperBound

getRandomNumber

public static java.math.BigInteger getRandomNumber(java.math.BigInteger inclusiveLowerBound,
                                                   java.math.BigInteger exclusiveUpperBound)

Generates a uniformly random integer k with inclusiveLowerBound <= k < exclusiveUpperBound

getRandomNumber

public static long getRandomNumber(long inclusiveLowerBound,
                                   long exclusiveUpperBound)

Generates a uniformly random integer k with inclusiveLowerBound <= k < exclusiveUpperBound.

getRandomNumber

public static int getRandomNumber(int inclusiveLowerBound,
                                  int exclusiveUpperBound)

Generates a uniformly random integer k with inclusiveLowerBound <= k < exclusiveUpperBound.

getRandomNonZeroNumber

public static java.math.BigInteger getRandomNonZeroNumber(java.math.BigInteger exclusiveUpperBound)

Generates a uniformly random integer k with 1 <= k < exclusiveUpperBound

getRandomNumberOfBitlength

public static java.math.BigInteger getRandomNumberOfBitlength(int bitlength)

Generates a random integer k with \(0 \leq k < 2^{\text{bitlength}}-1\).

getRandomBytes

public static byte[] getRandomBytes(int l)

Returns random byte array of given length.

Parameters:

l - length of resulting byte array

getRandomBit

public static boolean getRandomBit()

getRandomPrime

public static java.math.BigInteger getRandomPrime(int bitlength)

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

Parameters:

bitlength - desired number of bits for the prime number

Returns:

a BigInteger that is probably prime