# [RustCrypto]: PKCS#1 (RSA)
[![crate][crate-image]][crate-link]
[![Docs][docs-image]][docs-link]
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![Apache2/MIT licensed][license-image]
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Pure Rust implementation of Public-Key Cryptography Standards (PKCS) #1:
RSA Cryptography Specifications Version 2.2 ([RFC 8017]).
[Documentation][docs-link]
## About
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:
```
-----BEGIN RSA PRIVATE KEY-----
```
PEM encoded RSA public keys begin with:
```
-----BEGIN RSA PUBLIC KEY-----
```
## License
Licensed under either of:
* [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0)
* [MIT license](http://opensource.org/licenses/MIT)
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.
[//]: # (badges)
[crate-image]: https://img.shields.io/crates/v/pkcs1.svg
[crate-link]: https://crates.io/crates/pkcs1
[docs-image]: https://docs.rs/pkcs1/badge.svg
[docs-link]: https://docs.rs/pkcs1/
[license-image]: https://img.shields.io/badge/license-Apache2.0/MIT-blue.svg
[rustc-image]: https://img.shields.io/badge/rustc-1.51+-blue.svg
[chat-image]: https://img.shields.io/badge/zulip-join_chat-blue.svg
[chat-link]: https://rustcrypto.zulipchat.com/#narrow/stream/300570-formats
[build-image]: https://github.com/RustCrypto/formats/workflows/pkcs1/badge.svg?branch=master&event=push
[build-link]: https://github.com/RustCrypto/formats/actions
[//]: # (links)
[RustCrypto]: https://github.com/rustcrypto
[RFC 8017]: https://datatracker.ietf.org/doc/html/rfc8017