Import asn1-rs crate.upstream

Request Document: go/android-rust-importing-crates
For CL Reviewers: go/android3p#cl-review
For Build Team: go/ab-third-party-imports
Bug: 312432424
Test: Treehugger

Change-Id: I85bc232ad9135f53080ca8b0f5f3458aaf374d38

1 files changed, 13 insertions, 0 deletions

diff --git a/src/asn1_types/strings/utf8string.rs b/src/asn1_types/strings/utf8string.rs
new file mode 100644
index 0000000..0bf87d4
--- /dev/null
+++ b/src/asn1_types/strings/utf8string.rs
@@ -0,0 +1,13 @@
+use crate::asn1_string;
+use crate::Result;
+use crate::TestValidCharset;
+use alloc::string::String;
+
+asn1_string!(Utf8String);
+
+impl<'a> TestValidCharset for Utf8String<'a> {
+    fn test_valid_charset(i: &[u8]) -> Result<()> {
+        let _ = core::str::from_utf8(i)?;
+        Ok(())
+    }
+}