From 00de85f833eb3d0de562f3ae22e4e6386dba915d Mon Sep 17 00:00:00 2001
From: Philip Ye <yestyle@gmail.com>
Date: Mon, 22 Jul 2024 01:28:41 +1200
Subject: [PATCH] Fix encoding of optional TaggedImplicit object

---
 src/asn1_types/tagged/implicit.rs |  2 +-
 tests/to_der.rs                   | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/asn1_types/tagged/implicit.rs b/src/asn1_types/tagged/implicit.rs
index 01e6ae5..2189b6b 100644
--- a/src/asn1_types/tagged/implicit.rs
+++ b/src/asn1_types/tagged/implicit.rs
@@ -130,7 +130,7 @@ where
     }
 
     fn write_der_content(&self, writer: &mut dyn std::io::Write) -> SerializeResult<usize> {
-        self.inner.write_der(writer)
+        self.inner.write_der_content(writer)
     }
 }
 
diff --git a/tests/to_der.rs b/tests/to_der.rs
index 05c523f..62f09c6 100644
--- a/tests/to_der.rs
+++ b/tests/to_der.rs
@@ -482,6 +482,17 @@ fn to_der_tagged_implicit() {
     assert!(tagged.eq(&t2));
 }
 
+#[test]
+fn to_der_tagged_implicit_optional() {
+    // TaggedValue API
+    let tagged = Some(TaggedValue::implicit(Integer::from(2)));
+    let v = tagged.to_der_vec().expect("serialization failed");
+    assert_eq!(&v, &hex!("81 01 02"));
+    let (_, t2) = OptTaggedImplicit::<Integer, Error, 1>::from_der(&v)
+        .expect("decoding serialized object failed");
+    assert!(tagged.eq(&t2));
+}
+
 #[test]
 fn to_der_teletexstring() {
     test_simple_string!(TeletexString, "abcdef");