| //! ASN.1 `VideotexString` support. |
| |
| use crate::{asn1::AnyRef, FixedTag, Result, StrRef, Tag}; |
| use core::{fmt, ops::Deref}; |
| |
| /// ASN.1 `VideotexString` type. |
| /// |
| /// Supports a subset the ASCII character set (described below). |
| /// |
| /// For UTF-8, use [`Utf8StringRef`][`crate::asn1::Utf8StringRef`] instead. |
| /// For the full ASCII character set, use |
| /// [`Ia5StringRef`][`crate::asn1::Ia5StringRef`]. |
| /// |
| /// This is a zero-copy reference type which borrows from the input data. |
| /// |
| /// # Supported characters |
| /// |
| /// For the practical purposes VideotexString is treated as IA5string, disallowing non-ASCII chars. |
| /// |
| #[derive(Copy, Clone, Eq, PartialEq, PartialOrd, Ord)] |
| pub struct VideotexStringRef<'a> { |
| /// Inner value |
| inner: StrRef<'a>, |
| } |
| |
| impl<'a> VideotexStringRef<'a> { |
| /// Create a new ASN.1 `VideotexString`. |
| pub fn new<T>(input: &'a T) -> Result<Self> |
| where |
| T: AsRef<[u8]> + ?Sized, |
| { |
| let input = input.as_ref(); |
| |
| // Validate all characters are within VideotexString's allowed set |
| // FIXME: treat as if it were IA5String |
| if input.iter().any(|&c| c > 0x7F) { |
| return Err(Self::TAG.value_error()); |
| } |
| |
| StrRef::from_bytes(input) |
| .map(|inner| Self { inner }) |
| .map_err(|_| Self::TAG.value_error()) |
| } |
| } |
| |
| impl_string_type!(VideotexStringRef<'a>, 'a); |
| |
| impl<'a> Deref for VideotexStringRef<'a> { |
| type Target = StrRef<'a>; |
| |
| fn deref(&self) -> &Self::Target { |
| &self.inner |
| } |
| } |
| |
| impl FixedTag for VideotexStringRef<'_> { |
| const TAG: Tag = Tag::VideotexString; |
| } |
| |
| impl<'a> From<&VideotexStringRef<'a>> for VideotexStringRef<'a> { |
| fn from(value: &VideotexStringRef<'a>) -> VideotexStringRef<'a> { |
| *value |
| } |
| } |
| |
| impl<'a> From<VideotexStringRef<'a>> for AnyRef<'a> { |
| fn from(printable_string: VideotexStringRef<'a>) -> AnyRef<'a> { |
| AnyRef::from_tag_and_value(Tag::VideotexString, printable_string.inner.into()) |
| } |
| } |
| |
| impl<'a> From<VideotexStringRef<'a>> for &'a [u8] { |
| fn from(printable_string: VideotexStringRef<'a>) -> &'a [u8] { |
| printable_string.as_bytes() |
| } |
| } |
| |
| impl<'a> fmt::Debug for VideotexStringRef<'a> { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| write!(f, "VideotexString({:?})", self.as_str()) |
| } |
| } |
| |
| #[cfg(test)] |
| mod tests { |
| use super::VideotexStringRef; |
| use crate::Decode; |
| |
| #[test] |
| fn parse_bytes() { |
| let example_bytes = &[ |
| 0x15, 0x0b, 0x54, 0x65, 0x73, 0x74, 0x20, 0x55, 0x73, 0x65, 0x72, 0x20, 0x31, |
| ]; |
| |
| let printable_string = VideotexStringRef::from_der(example_bytes).unwrap(); |
| assert_eq!(printable_string.as_str(), "Test User 1"); |
| } |
| } |