#certificate #rfc #public-key-infrastructure #x509-certificate #pkcs #pkix #pem #der #5280

no-std x509-cert

Pure Rust implementation of the X.509 Public Key Infrastructure Certificate format as described in RFC 5280

20 releases

Uses new Rust 2024

0.3.0-rc.4 Jan 25, 2026
0.3.0-rc.2 Sep 15, 2025
0.3.0-rc.1 Jul 10, 2025
0.3.0-pre.0 Oct 8, 2024
0.0.2 Mar 14, 2022

#1774 in Cryptography

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1,670,599 downloads per month
Used in 398 crates (124 directly)

Apache-2.0 OR MIT

1MB
21K SLoC

RustCrypto: X.509 Certificates

crate Docs Build Status Apache2/MIT licensed Rust Version Project Chat

Pure Rust implementation of the X.509 Public Key Infrastructure Certificate format as described in RFC 5280.

Documentation

Minimum Supported Rust Version (MSRV) Policy

MSRV increases are not considered breaking changes and can happen in patch releases.

The crate MSRV accounts for all supported targets and crate feature combinations, excluding explicitly unstable features.

License

Licensed under either of:

at your option.

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 as above, without any additional terms or conditions.

Dependencies

~0.3–0.9MB
~19K SLoC