der: Missing Utf8String

[lumag]

Commit eab0dab ("x509-cert: make Certificate an owned type (#806)") changed most of the string types to have an owned implementation in addition to Ref one. The Utf8StringRef didn't get corresponding Utf8String type. Please provide one.

[tarcieri]

You can use String, though I now notice this isn't covered in the der docs

[lumag]

@tarcieri maybe I should have added the code that I have at this moment:

       {
            let val: String = match atv.value.tag() {
                Tag::PrintableString => atv
                    .value
                    .decode_as()
                    .map(|s: PrintableString| s.as_str().into()),
                Tag::Utf8String => atv
                    .value
                    .owned_to_ref()
                    .decode_as()
                    .map(|s: Utf8StringRef| s.to_string()),
                Tag::Ia5String => atv.value.decode_as().map(|s: Ia5String| s.as_str().into()),
                Tag::TeletexString => atv
                    .value
                    .decode_as()
                    .map(|s: TeletexString| s.as_str().into()),
                _ => return Err(format!("Unsupported tag {}", atv.value.tag()).into()),
    };

[tarcieri]

Doesn't this work?

atv
    .value
    .owned_to_ref()
    .decode_as::<String>()

[lumag]

@tarcieri yes, it works, thank you. Now I have:

let val: String = match atv.value.tag() {
                Tag::PrintableString => atv.value.decode_as::<PrintableString>()?.to_string(),
                Tag::Utf8String => atv.value.decode_as::<String>()?,
                Tag::Ia5String => atv.value.decode_as::<Ia5String>()?.to_string(),
                Tag::TeletexString => atv.value.decode_as::<TeletexString>()?.to_string(),
                _ => return Err(format!("Unsupported tag {}", atv.value.tag()).into()),
            };