1 files changed, 164 insertions, 0 deletions
diff --git a/vendor/der/src/asn1/utf8_string.rs b/vendor/der/src/asn1/utf8_string.rs
new file mode 100644
index 0000000..6018750
--- /dev/null
+++ b/vendor/der/src/asn1/utf8_string.rs
@@ -0,0 +1,164 @@
+//! ASN.1 `UTF8String` support.
+
+use crate::{
+    asn1::AnyRef, ord::OrdIsValueOrd, EncodeValue, Error, FixedTag, Length, Result, StrRef, Tag,
+    Writer,
+};
+use core::{fmt, ops::Deref, str};
+
+#[cfg(feature = "alloc")]
+use {
+    crate::{DecodeValue, Header, Reader},
+    alloc::{borrow::ToOwned, string::String},
+};
+
+/// ASN.1 `UTF8String` type.
+///
+/// Supports the full UTF-8 encoding.
+///
+/// Note that the [`Decode`][`crate::Decode`] and [`Encode`][`crate::Encode`]
+/// traits are impl'd for Rust's [`str`][`prim@str`] primitive, which
+/// decodes/encodes as a [`Utf8StringRef`].
+///
+/// You are free to use [`str`][`prim@str`] instead of this type, however it's
+/// still provided for explicitness in cases where it might be ambiguous with
+/// other ASN.1 string encodings such as
+/// [`PrintableStringRef`][`crate::asn1::PrintableStringRef`].
+///
+/// This is a zero-copy reference type which borrows from the input data.
+#[derive(Copy, Clone, Eq, PartialEq, PartialOrd, Ord)]
+pub struct Utf8StringRef<'a> {
+    /// Inner value
+    inner: StrRef<'a>,
+}
+
+impl<'a> Utf8StringRef<'a> {
+    /// Create a new ASN.1 `UTF8String`.
+    pub fn new<T>(input: &'a T) -> Result<Self>
+    where
+        T: AsRef<[u8]> + ?Sized,
+    {
+        StrRef::from_bytes(input.as_ref()).map(|inner| Self { inner })
+    }
+}
+
+impl_string_type!(Utf8StringRef<'a>, 'a);
+
+impl<'a> Deref for Utf8StringRef<'a> {
+    type Target = StrRef<'a>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.inner
+    }
+}
+
+impl FixedTag for Utf8StringRef<'_> {
+    const TAG: Tag = Tag::Utf8String;
+}
+
+impl<'a> From<&Utf8StringRef<'a>> for Utf8StringRef<'a> {
+    fn from(value: &Utf8StringRef<'a>) -> Utf8StringRef<'a> {
+        *value
+    }
+}
+
+impl<'a> From<Utf8StringRef<'a>> for AnyRef<'a> {
+    fn from(utf_string: Utf8StringRef<'a>) -> AnyRef<'a> {
+        AnyRef::from_tag_and_value(Tag::Utf8String, utf_string.inner.into())
+    }
+}
+
+impl<'a> fmt::Debug for Utf8StringRef<'a> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "Utf8String({:?})", self.as_str())
+    }
+}
+
+impl<'a> TryFrom<AnyRef<'a>> for &'a str {
+    type Error = Error;
+
+    fn try_from(any: AnyRef<'a>) -> Result<&'a str> {
+        Utf8StringRef::try_from(any).map(|s| s.as_str())
+    }
+}
+
+impl EncodeValue for str {
+    fn value_len(&self) -> Result<Length> {
+        Utf8StringRef::new(self)?.value_len()
+    }
+
+    fn encode_value(&self, writer: &mut impl Writer) -> Result<()> {
+        Utf8StringRef::new(self)?.encode_value(writer)
+    }
+}
+
+impl FixedTag for str {
+    const TAG: Tag = Tag::Utf8String;
+}
+
+impl OrdIsValueOrd for str {}
+
+#[cfg(feature = "alloc")]
+impl<'a> From<Utf8StringRef<'a>> for String {
+    fn from(s: Utf8StringRef<'a>) -> String {
+        s.as_str().to_owned()
+    }
+}
+
+#[cfg(feature = "alloc")]
+impl<'a> TryFrom<AnyRef<'a>> for String {
+    type Error = Error;
+
+    fn try_from(any: AnyRef<'a>) -> Result<String> {
+        Utf8StringRef::try_from(any).map(|s| s.as_str().to_owned())
+    }
+}
+
+#[cfg(feature = "alloc")]
+impl<'a> DecodeValue<'a> for String {
+    fn decode_value<R: Reader<'a>>(reader: &mut R, header: Header) -> Result<Self> {
+        Ok(String::from_utf8(reader.read_vec(header.length)?)?)
+    }
+}
+
+#[cfg(feature = "alloc")]
+impl EncodeValue for String {
+    fn value_len(&self) -> Result<Length> {
+        Utf8StringRef::new(self)?.value_len()
+    }
+
+    fn encode_value(&self, writer: &mut impl Writer) -> Result<()> {
+        Utf8StringRef::new(self)?.encode_value(writer)
+    }
+}
+
+#[cfg(feature = "alloc")]
+impl FixedTag for String {
+    const TAG: Tag = Tag::Utf8String;
+}
+
+#[cfg(feature = "alloc")]
+impl OrdIsValueOrd for String {}
+
+#[cfg(test)]
+mod tests {
+    use super::Utf8StringRef;
+    use crate::Decode;
+
+    #[test]
+    fn parse_ascii_bytes() {
+        let example_bytes = &[
+            0x0c, 0x0b, 0x54, 0x65, 0x73, 0x74, 0x20, 0x55, 0x73, 0x65, 0x72, 0x20, 0x31,
+        ];
+
+        let utf8_string = Utf8StringRef::from_der(example_bytes).unwrap();
+        assert_eq!(utf8_string.as_str(), "Test User 1");
+    }
+
+    #[test]
+    fn parse_utf8_bytes() {
+        let example_bytes = &[0x0c, 0x06, 0x48, 0x65, 0x6c, 0x6c, 0xc3, 0xb3];
+        let utf8_string = Utf8StringRef::from_der(example_bytes).unwrap();
+        assert_eq!(utf8_string.as_str(), "Helló");
+    }
+}