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rust-asn1

This is a Rust library for parsing and generating ASN.1 data (DER only).

Installation

Add asn1 to the [dependencies] section of your Cargo.toml:

[dependencies]
asn1 = "0.20"

Builds on Rust 1.65.0 and newer.

rust-asn1 is compatible with #![no_std] environments:

asn1 = { version = "0.20", default-features = false }

Changelog

Unreleased

Changes

• Updated MSRV to 1.65.0.

Fixes

• Fixed "perfect derives" in conjunction with #[derive(Asn1DefinedByRead)] and #[derive(Asn1DefinedByWrite)]. (#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" in conjunction with #[implicit] and #[explicit]. (#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)

• GeneralizedTime is a new type that accepts fractional seconds replacing the old GeneralizedTime. (#492)

• #[derive(asn1::Asn1Read)] and #[derive(asn1::Asn1Write)] now implement "perfect derives". (#496)