Re: ASN.1

["Jarkko Sakkinen" <jarkko@kernel.org>]

On Wed May 22, 2024 at 3:04 PM EEST, Alex Gaynor wrote:
> Hi Jarkko,
>
> I'm one of the maintainers of https://crates.io/crates/asn1/. Based on
> that experience, if you want to implement a DER encoder in Rust, I
> think it'd make more sense to write the type-code in Rust, and then
> expose symbols to C like `encode_rsa_pub_key`. This should be simpler,
> but also more efficient (fewer allocations).
>
> For what it's worth, rust-asn1 is _intended_ to be usable from the
> kernel/embedded targets. It's no_std. It currently relies on alloc,
> but I'd be happy to accept PRs to make it work with the kernel's
> approach to fallible allocation (it currently does support fallible
> allocation, but using the reserve APIs).
>
> Alex

Right, I need to experiment with that just in user space first.

It seemed like most "productized" crate from all that I found.

Yeah, and it is true that also crate could be as rusty as hell,
and then just make bridge shim that hides all that ;-) That is
probably better way around.

Thanks for the response!

BR, Jarkko