Crate der_derive

Custom derive support for the der crate.

This crate contains custom derive macros intended to be used in the following way:

• Choice: map ASN.1 CHOICE to a Rust enum.
• Message: map ASN.1 SEQUENCE to a Rust struct.

Note that this crate shouldn't be used directly, but instead accessed by using the derive feature of the der crate.

#[asn1(type = "...")] attribute

This attribute can be used to specify the ASN.1 type for a particular enum variant or struct field.

It's presently mandatory for all enum variants, even when using one of the ASN.1 types defined by this crate.

For structs, placing this attribute on a field makes it possible to decode/encode types which don't directly implement the Decode/Encode traits but do impl From and TryInto and From for one of the ASN.1 types listed below (use the ASN.1 type keywords as the type):

• BIT STRING: performs an intermediate conversion to der::BitString
• GeneralizedTime: performs an intermediate conversion to der::GeneralizedTime
• OCTET STRING: performs an intermediate conversion to der::OctetString
• PrintableString: performs an intermediate conversion to der::PrintableString
• UTCTime: performs an intermediate conversion to der::UtcTime
• UTF8String: performs an intermediate conversion to der::Utf8String

Note: please open a GitHub Issue if you would like to request support for additional ASN.1 types.

Derive Macros

Choice	Derive the Choice trait on an enum.
Message	Derive the Message trait on a struct.