Module urandom::rng

Random number generators.

Pseudorandom number generators

These generators implement fast PRNG which are suitable for normal use in non-cryptography applications.

• SplitMix64 Rng:

  Simple 64-bit state generator uses wrapping addition, wrapping multiplication, XOR and shifts.

• Xoshiro256 Rng:

  Kindly taken from Sebastiano Vigna’s excellent PRNG shootout article.

Cryptographically secure generators

These generators implement suitable CSPRNG implementations without calling out to the system or hardware directly.

• ChaCha20 Rng:

  Daniel J. Bernstein’s ChaCha20 adapted as a deterministic random number generator.

Structs

ChaCha20

Daniel J. Bernstein’s ChaCha20 adapted as a deterministic random number generator.

MockRng

Random number generator mock.

ReadRng

An RNG that reads random bytes straight from any type supporting std::io::Read, for example files.

SplitMix64

Java 8’s SplittableRandom generator.

Xoshiro256

This is xoshiro256 1.0, one of our all-purpose, rock-solid generators.

Traits

Rng

Random number generator interface.

SeedRng

Constructors for deterministic random number generators.

Functions

getentropy

Provides cryptographically secure entropy.