Conversion to Status seems wrong

[ionut-arm]

Currently the conversion From<psa_crypto_sys::psa_status_t> for Status converts any unsupported integer to a GenericError - I think that's not entirely correct as it aliases an error occuring in the crate with one relayed by the linked library.

The correct thing to do would be to have TryFrom and return a crate-specific error for anything outside of the recognised codes, and the correct enum variant for the correct ones. However I do get that TryFrom is not actually available without std so maybe we should have a method implemented straight on Status when no-std is on and the normal TryFrom when std is available.

[ionut-arm]

I'm assuming that as the library gets more complex there'll be more need for crate-internal errors

[hug-dev]

I agree that it is not ideal but it is also a way to simplify error handling with less types to unwrap for the caller. It's nice that conceptually only PSA Crypto 1.0.0 abstracted types are used and not our own.

[ionut-arm]

Agreed to leave as is for now, since it's not a huge problem. If something new pops up in the future, we can just reopen this