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RustCrypto: PKCS#1 (RSA)

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

Pure Rust implementation of Public-Key Cryptography Standards (PKCS) #1: RSA Cryptography Specifications Version 2.2 (RFC 8017).



This crate supports encoding and decoding RSA private and public keys in either PKCS#1 DER (binary) or PEM (text) formats.

PEM encoded RSA private keys begin with:


PEM encoded RSA public keys begin with:


Minimum Supported Rust Version

This crate requires Rust 1.57 at a minimum.

We may change the MSRV in the future, but it will be accompanied by a minor version bump.


Licensed under either of:

at your option.


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.