#crypto #random #csprng #prng #rng


An interface to the OS’ secure random number generator

1 unstable release

Uses new Rust 2021

0.1.0 Sep 8, 2022

#856 in Cryptography

23 downloads per month

BSD-2-Clause OR MIT

157 lines

License BSD-2-Clause License MIT docs.rs crates.io Download numbers AppVeyor CI dependency status


Welcome to osrandom 🎉

This crate provides access to your operating system's cryptographically secure random number generator.

APIs used

The following native APIs are used:

  • macOS/iOS: SecRandomCopyBytes from the security framework
  • FreeBSD/OpenBSD/NetBSD: arc4random_buf (which does not use ARC4 anymore but a secure PRF like ChaCha20)
  • Windows: CryptGenRandom with PROV_RSA_FULL as provider
  • Linux-GNU: getrandom for glibc versions >= 2.25 or /dev/urandom for ancient distributions
  • Linux-MUSL: /dev/urandom for ancient distributions

No runtime deps