https://github.com/alex/rust-asn1
A Rust ASN.1 (DER) serializer.
https://github.com/alex/rust-asn1
Last synced: 6 months ago
JSON representation
A Rust ASN.1 (DER) serializer.
- Host: GitHub
- URL: https://github.com/alex/rust-asn1
- Owner: alex
- License: bsd-3-clause
- Created: 2015-07-18T13:07:15.000Z (over 10 years ago)
- Default Branch: main
- Last Pushed: 2025-05-02T17:03:37.000Z (6 months ago)
- Last Synced: 2025-05-13T17:17:32.287Z (6 months ago)
- Language: Rust
- Size: 695 KB
- Stars: 118
- Watchers: 6
- Forks: 30
- Open Issues: 9
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# rust-asn1
[![Dependency Status][deps-rs-image]][deps-rs-link]
[![Documentation][docs-rs-image]][docs-rs-link]
This is a Rust library for parsing and generating ASN.1 data (DER only).
## Installation
Add `asn1` to your `Cargo.toml`:
```console
$ cargo add asn1
```
Builds on Rust 1.65.0 and newer.
`rust-asn1` is compatible with `#![no_std]` environments:
```console
$ cargo add asn1 --no-default-features
```
## Changelog
### [Unreleased]
#### Added
- `Parser` now exposes a `peek_tag` method that returns the tag of the next
element in the parse, without consuming that element.
([#532](https://github.com/alex/rust-asn1/pull/532))
### [0.21.0]
#### Changes
- Updated MSRV to 1.65.0.
#### Fixes
- Fixed ["perfect derives"](https://smallcultfollowing.com/babysteps/blog/2022/04/12/implied-bounds-and-perfect-derive/)
in conjunction with `#[derive(Asn1DefinedByRead)]` and
`#[derive(Asn1DefinedByWrite)]`.
([#506](https://github.com/alex/rust-asn1/pull/506))
### [0.20.0]
#### :rotating_light: Breaking changes
- Removed `Writer::{write_explicit_element, write_optional_explicit_element, write_implicit_element, write_optional_implicit_element}`.
These can all be better accomplished with the `asn1::Explicit` and
`asn1::Implicit` types.
#### Fixes
- Fixed ["perfect derives"](https://smallcultfollowing.com/babysteps/blog/2022/04/12/implied-bounds-and-perfect-derive/)
in conjunction with `#[implicit]` and `#[explicit]`.
([#502](https://github.com/alex/rust-asn1/pull/502))
### [0.19.0]
#### :rotating_light: Breaking changes
- `GeneralizedTime` has been renamed to `X509GeneralizedTime`. The type does
not allow fractional seconds, however this restriction is not actually a DER
rule, it is specific to X.509.
([#494](https://github.com/alex/rust-asn1/pull/494))
- `GeneralizedTime` is a new type that accepts fractional seconds
replacing the old `GeneralizedTime`.
([#492](https://github.com/alex/rust-asn1/pull/492))
- `#[derive(asn1::Asn1Read)]` and `#[derive(asn1::Asn1Write)]` now implement
["perfect derives"](https://smallcultfollowing.com/babysteps/blog/2022/04/12/implied-bounds-and-perfect-derive/).
([#496](https://github.com/alex/rust-asn1/pull/496))
[deps-rs-image]: https://deps.rs/repo/github/alex/rust-asn1/status.svg
[deps-rs-link]: https://deps.rs/repo/github/alex/rust-asn1
[docs-rs-image]: https://docs.rs/asn1/badge.svg
[docs-rs-link]: https://docs.rs/asn1/