Crate features / ring
Feature flags · ring 0.17.14 · from crates.io 2026-10-24
ring features: what each one does, and the line to copy
Short answerring 0.17.14 has 10 features. By default it turns on alloc, dev_urandom_fallback; add default-features = false to start from nothing. It needs Rust 1.66.0 or newer.
Pick features
Every feature
| Feature | In default | Turns on |
|---|---|---|
alloc | yes | nothing else (a switch the code checks) |
dev_urandom_fallback | yes | nothing else (a switch the code checks) |
less-safe-getrandom-custom-or-rdrand | nothing else (a switch the code checks) | |
less-safe-getrandom-espidf | nothing else (a switch the code checks) | |
slow_tests | nothing else (a switch the code checks) | |
std | alloc | |
test_logging | nothing else (a switch the code checks) | |
unstable-testing-arm-no-hw | nothing else (a switch the code checks) | |
unstable-testing-arm-no-neon | nothing else (a switch the code checks) | |
wasm32_unknown_unknown_js | getrandom/js |
dep:x turns on the optional dependency x; x/y turns on feature y of dependency x (with ?, only if x is already on).
MSRV history
The minimum Rust version ring declares (rust-version), and the release that changed it:
- 0.17.0-beta.1 (2023-10-02): Rust 1.61.0
- 0.17.9-alpha1 (2025-02-13): Rust 1.63.0
- 0.17.13 (2025-03-07): Rust 1.66.0
Stuck on an older compiler? Pin the last version that supports it, for example cargo update -p ring --precise <version>, or use resolver 3, which picks compatible versions for you.
More on ring
Real downloads, dependents and alternatives: ring crate data (2.1M real downloads a day, 1,837 dependents).
Security record: ring advisories.
docs.rs feature list · crates.io · license Apache-2.0 AND ISC · edition 2021
Up next
Before you depend on itring crate dataReal downloads, dependents, alternatives.Read it next →Did this answer your question?