Pure Rust CSPRNG for the OxiCrypto stack.

Provides [OxiRng], a ChaCha20-based CSPRNG seeded from the OS via getrandom.

Fork Safety

On Unix platforms, [OxiRng] tracks the process PID and automatically reseeds after a fork() to prevent parent/child CSPRNG state sharing.

Thread-Local RNG

Use with_thread_rng (available with the std feature) for a convenient per-thread RNG (lazily initialized, no explicit RNG management required).

ChaCha Variants

[OxiRng8] and [OxiRng12] provide ChaCha8 and ChaCha12-based CSPRNGs for higher throughput when the full 20-round version is not required.

Entropy Health Check

[check_entropy] performs a basic OS-entropy smoke test (two independent draws must be non-zero and differ). This is not a NIST SP 800-90B test.