aws-lc-rs aws-lc-sys aws-lc-fips-sys

aws-lc-rs is a cryptographic library using AWS Libcrypto (AWS-LC) for its cryptographic operations. This library strives to be API-compatible with the popular Rust library named ring (v0.16). It uses one of our auto-generated Foreign Function Interface (FFI) crates (either aws-lc-sys or aws-lc-fips-sys) for binding to AWS-LC for the cryptographic implementations.


Rust developers increasingly need to deploy applications that meet US and Canadian government cryptographic requirements. We evaluated how to deliver FIPS validated cryptography in idiomatic and performant Rust, built around our AWS-LC offering. We found that the popular ring library fulfilled much of the cryptographic needs in the Rust community, but it did not meet the needs of developers with FIPS requirements. Our intention is to contribute a drop-in replacement for ring that provides FIPS support and is compatible with the ring (v0.16) API. Rust developers with prescribed cryptographic requirements can seamlessly integrate aws-lc-rs into their applications and deploy them into AWS Regions.

Questions, Feedback and Contributing

We use GitHub Issues for managing feature requests, bug reports, or questions about aws-lc-rs API usage.

Otherwise, if you think you might have found a security impacting issue, please instead follow our Security Notification Process below.

Security Notification Process

If you discover a potential security issue in AWS-LC or aws-lc-rs, we ask that you notify AWS Security via our vulnerability reporting page. Please do not create a public GitHub issue.

If you package or distribute aws-lc-rs, or use aws-lc-rs as part of a large multi-user service, you may be eligible for pre-notification of future aws-lc-rs releases. Please contact


aws-lc-rs is licensed under the Apache-2.0 or the ISC License. The aws-lc-sys and aws-lc-fips-sys libraries contain code from AWS-LC and are licensed under the ISC AND ( Apache-2.0 OR ISC ) AND OpenSSL licenses.