Adding upstream version 0.70.1+ds1.upstream/0.70.1+ds1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 53 insertions, 0 deletions

diff --git a/vendor/der/src/asn1/sequence.rs b/vendor/der/src/asn1/sequence.rs
new file mode 100644
index 0000000..ad4a5d5
--- /dev/null
+++ b/vendor/der/src/asn1/sequence.rs
@@ -0,0 +1,53 @@
+//! The [`Sequence`] trait simplifies writing decoders/encoders which map ASN.1
+//! `SEQUENCE`s to Rust structs.
+
+use crate::{
+    BytesRef, DecodeValue, EncodeValue, FixedTag, Header, Length, Reader, Result, Tag, Writer,
+};
+
+#[cfg(feature = "alloc")]
+use alloc::boxed::Box;
+
+/// Marker trait for ASN.1 `SEQUENCE`s.
+///
+/// This is mainly used for custom derive.
+pub trait Sequence<'a>: DecodeValue<'a> + EncodeValue {}
+
+impl<'a, S> FixedTag for S
+where
+    S: Sequence<'a>,
+{
+    const TAG: Tag = Tag::Sequence;
+}
+
+#[cfg(feature = "alloc")]
+impl<'a, T> Sequence<'a> for Box<T> where T: Sequence<'a> {}
+
+/// The [`SequenceRef`] type provides raw access to the octets which comprise a
+/// DER-encoded `SEQUENCE`.
+///
+/// This is a zero-copy reference type which borrows from the input data.
+pub struct SequenceRef<'a> {
+    /// Body of the `SEQUENCE`.
+    body: BytesRef<'a>,
+}
+
+impl<'a> DecodeValue<'a> for SequenceRef<'a> {
+    fn decode_value<R: Reader<'a>>(reader: &mut R, header: Header) -> Result<Self> {
+        Ok(Self {
+            body: BytesRef::decode_value(reader, header)?,
+        })
+    }
+}
+
+impl EncodeValue for SequenceRef<'_> {
+    fn value_len(&self) -> Result<Length> {
+        Ok(self.body.len())
+    }
+
+    fn encode_value(&self, writer: &mut impl Writer) -> Result<()> {
+        self.body.encode_value(writer)
+    }
+}
+
+impl<'a> Sequence<'a> for SequenceRef<'a> {}