add OCSP encoders and decoders

Cargo.toml

@@ -7,6 +7,7 @@ members = [
     "const-oid",
     "der",
     "der/derive",
+    "ocsp",
     "pem-rfc7468",
     "pkcs1",
     "pkcs5",

ocsp/Cargo.toml

@@ -0,0 +1,30 @@
+[package]
+name = "x509-ocsp"
+version = "0.0.1"
+description = """
+Pure Rust implementation of the X.509 Internet Public Key Infrastructure
+Online Certificate Status Protocol - OCSP formats as described in RFC 6960
+"""
+authors = ["RustCrypto Developers"]
+license = "Apache-2.0 OR MIT"
+repository = "https://github.com/RustCrypto/formats/tree/master/x509"
+categories = ["cryptography", "data-structures", "encoding", "no-std"]
+keywords = ["crypto", "x.509"]
+readme = "README.md"
+edition = "2021"
+rust-version = "1.57"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+der = { version = "0.6.0-pre.3", features = ["oid", "derive", "alloc"], path = "../der" }
+x509-cert = { version = "0.0.2", path = "../x509" }
+const-oid = { version = "0.9.0", path = "../const-oid" }
+spki = { version = "=0.6.0-pre.2", path = "../spki" }
+
+[dev-dependencies]
+hex-literal = "0.3"
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]

ocsp/README.md

@@ -0,0 +1,60 @@
+# [RustCrypto]: X.509
+
+[![crate][crate-image]][crate-link]
+[![Docs][docs-image]][docs-link]
+[![Build Status][build-image]][build-link]
+![Apache2/MIT licensed][license-image]
+![Rust Version][rustc-image]
+[![Project Chat][chat-image]][chat-link]
+
+Pure Rust implementation of the X.509 Internet Public Key Infrastructure
+Online Certificate Status Protocol - OCSP formats as described in [RFC 6960].
+
+[Documentation][docs-link]
+
+## Status
+
+tl;dr: not ready to use.
+
+This is a work-in-progress implementation which is at an early stage of
+development.
+
+## 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.
+
+## 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/x509.svg
+[crate-link]: https://crates.io/crates/x509
+[docs-image]: https://docs.rs/x509/badge.svg
+[docs-link]: https://docs.rs/x509/
+[build-image]: https://github.com/RustCrypto/formats/actions/workflows/x509.yml/badge.svg
+[build-link]: https://github.com/RustCrypto/formats/actions/workflows/x509.yml
+[license-image]: https://img.shields.io/badge/license-Apache2.0/MIT-blue.svg
+[rustc-image]: https://img.shields.io/badge/rustc-1.57+-blue.svg
+[chat-image]: https://img.shields.io/badge/zulip-join_chat-blue.svg
+[chat-link]: https://rustcrypto.zulipchat.com/#narrow/stream/300570-formats
+
+[//]: # (links)
+
+[RustCrypto]: https://github.com/rustcrypto
+[RFC 6960]: https://datatracker.ietf.org/doc/html/rfc6960

ocsp/src/lib.rs

@@ -0,0 +1,6 @@
+//! The ocsp module features encoders and decoders for the structures defined in [RFC 6960](https://datatracker.ietf.org/doc/html/rfc6960).
+#![no_std]
+
+pub mod ocsp;
+
+extern crate alloc;