42 stable releases (4 major)
| new 5.0.0-alpha.2 | Jan 21, 2026 |
|---|---|
| 4.21.1 | Jan 23, 2026 |
| 4.19.0 | Sep 5, 2025 |
| 4.17.0 | May 28, 2025 |
| 1.0.2 | Nov 12, 2020 |
#379 in Cryptography
140,174 downloads per month
Used in 81 crates
(10 directly)
21MB
620K
SLoC
boring
BoringSSL bindings for the Rust programming language and TLS adapters for tokio and hyper built on top of it.
Documentation
- Boring API: https://docs.rs/boring
- tokio TLS adapters: https://docs.rs/tokio-boring
- hyper HTTPS connector: https://docs.rs/hyper-boring
- FFI bindings: https://docs.rs/boring-sys
Upgrading from boring v4
- First update to boring 4.20 and ensure it builds without any deprecation warnings.
pq-experimentalCargo feature is no longer needed. Post-quantum crypto is enabled by default.fips-precompiledCargo feature has been merged intofips. SetBORING_BSSL_FIPS_PATHenv var to use a precompiled library.fips-compatCargo feature has been renamed tolegacy-compat-deprecated(4cb7e260a85b7)SslCurveandSslCurveNidhave been removed. Useset_curves_list().Ssl::new_from_ref->Ssl::new().X509Builder::append_extension2->X509Builder::append_extension.X509Storeis now cheaply cloneable, but immutable.SslContextBuilder.cert_store_mut()can't be used after.set_cert_store(). Use.set_cert_store_builder()if you need.cert_store_mut().hyper0.x support has been removed. Usehyper1.x.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed under the terms of both the Apache License, Version 2.0 and the MIT license without any additional terms or conditions.
Accolades
The project is based on a fork of rust-openssl.