oiddbgen: parse types aliased to OBJECT IDENTIFIER

[simpsoneric]

As part of RFC 5280, there are a few types that are essentially aliases for OBJECT IDENTIFIER.

One example is the AttributeType used in the x509 subject name:

AttributeType ::= OBJECT IDENTIFIER

-- Arc for standard naming attributes

id-at OBJECT IDENTIFIER ::= { joint-iso-ccitt(2) ds(5) 4 }

-- Naming attributes of type X520name

id-at-name                AttributeType ::= { id-at 41 }
id-at-surname             AttributeType ::= { id-at  4 }
id-at-givenName           AttributeType ::= { id-at 42 }
id-at-initials            AttributeType ::= { id-at 43 }
id-at-generationQualifier AttributeType ::= { id-at 44 }

[...]

-- Naming attributes of type X520SerialNumber

id-at-serialNumber      AttributeType ::= { id-at 5 }

Since items like the id-at-name are not directly of type OBJECT IDENTIFIER, the oiddbgen does not pick them up.

I'm not sure about the best way to handle this, but I gave it a proof-of-concept at https://github.com/simpsoneric/formats/tree/object-id-aliases

The resulting src/db/gen.rs picks up the OIDs I was interested in.

[simpsoneric]

On a related note, I was attempting to test this local crate version with my code but I am having conflicts for the ObjectIdentifier type. I'm not sure how to handle the workspace dependencies and could use a pointer.

In my project's Cargo.toml I have:

[dependencies]
x509-cert = { path = "../formats/x509-cert", features = ["builder"] }
const-oid = { path = "../formats/const-oid", features = ["db", "std"] }

But when I compile, I get errors like the following:

   Compiling foo-bar  v0.1.0 
error[E0308]: mismatched types
  --> src/foo.rs:97:36
   |
97 |     let r = a.find(|&av| av.oid == attr);
   |                          ------    ^^^^ expected `ObjectIdentifier`, found `ObjectIdentifier<39>`
   |                          |
   |                          expected because this is `x509_cert::spki::ObjectIdentifier`
   |
   = note: `ObjectIdentifier<39>` and `ObjectIdentifier` have similar names, but are actually distinct types
note: `ObjectIdentifier<39>` is defined in crate `const_oid`
  --> /home/foo/formats/const-oid/src/lib.rs:69:1
   |
69 | pub struct ObjectIdentifier<const MAX_SIZE: usize = DEFAULT_MAX_SIZE> {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: `ObjectIdentifier` is defined in crate `const_oid`
  --> /home/foo/.cargo/registry/src/index.crates.io-6f17d22bba15001f/const-oid-0.9.6/src/lib.rs:81:1
   |
81 | pub struct ObjectIdentifier {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
   = note: perhaps two different versions of crate `const_oid` are being used?

How do you handle local development for the crate? I'm not that familiar with rust workspace projects.

[tarcieri]

We're in the middle of transitioning over to a new release cycle, and x509-cert has not yet been upgraded to use the new prerelease version of const-oid