THE SOFTWARE IS PROVIDED "AS IS" AND BRIAN SMITH AND THE AUTHORS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL BRIAN SMITH OR THE AUTHORS BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
ring is focused on the implementation, testing, and optimization of a core set of cryptographic operations exposed via an easy-to-use (and hard-to-misuse) API. ring exposes a Rust API and is written in a hybrid of Rust, C, and assembly language.
Particular attention is being paid to making it easy to build and integrate ring into applications and higher-level frameworks, and to ensuring that ring works optimally on small devices, and eventually microcontrollers, to support Internet of Things (IoT) applications.
Most of the C and assembly language code in ring comes from BoringSSL, and BoringSSL is derived from OpenSSL. ring merges changes from BoringSSL regularly. Also, several changes that were developed for ring have been contributed to and integrated into BoringSSL.
See the documentation at https://docs.rs/ring/latest/ring/.
See BUILDING.md for instructions on how to build it. These instructions are especially important for cross-compiling and for building on Windows when not building from crates.io, as there are build prerequisites that need to be installed.
ring's benchmarks are located in the
benches folder of this repository. Because
there is lots of platform-specific code in ring, and because ring chooses
dynamically at runtime which optimized implementation of each crypto primitive
to use, it is very difficult to publish a useful single set of benchmarks;
instead, you are highly encouraged to run the benchmarks yourselves on your
The most important contributions are uses of ring. That is, we're very interested in seeing useful things built on top of ring, like implementations of TLS, SSH, the Noise Protocol, etc.
The ring project happily accepts pull requests. The portions of pull requests that modify existing files must be licensed under the same terms as the files being modified. New files in pull requests, including in particular all Rust code, must be licensed under the ISC-style license. Please state that you agree to license your contributions in the commit messages of commits in pull requests by putting this at the bottom of your commit message:
I agree to license my contributions to each file under the terms given at the top of each file I changed.
Minimum Supported Rust Version (MSRV)
ring is tested on the latest Stable, Beta, and Nightly releases of Rust, as well as the oldest version known to work according to the tests run in CI. That oldest version known to work is documented as the MSRV in Cargo.toml.
Please see SECURITY.md for help on reporting security vulnerabilities.
Please report bugs that aren't security vulnerabilities either as pull requests or as issues in the issue tracker.