From bdbbb6471c166c49ec61b5e6f0d987c07a5855a2 Mon Sep 17 00:00:00 2001
From: Lars Eggert <lars@eggert.org>
Date: Tue, 11 Feb 2025 12:06:55 +0200
Subject: [PATCH] Add test

---
 neqo-transport/src/shuffle.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/neqo-transport/src/shuffle.rs b/neqo-transport/src/shuffle.rs
index fdea23f999..9d0295c391 100644
--- a/neqo-transport/src/shuffle.rs
+++ b/neqo-transport/src/shuffle.rs
@@ -124,6 +124,19 @@ mod tests {
         assert!(super::find_sni(truncated).is_none());
     }
 
+    #[test]
+    fn find_sni_invalid_sni_length() {
+        // ClientHello with an SNI extension with an invalid length
+        let mut buf = Vec::from(BUF_WITH_SNI);
+        let len = buf.len();
+
+        assert!(buf[len - 23] == 0x00 && buf[len - 22] == 0x0c); // Check Server Name List length
+                                                                 // Set Server Name List length to 0
+        buf[len - 23] = 0x00;
+        buf[len - 22] = 0x00;
+        assert!(super::find_sni(&buf).is_none());
+    }
+
     #[test]
     fn find_sni_no_ci() {
         // Not a ClientHello (msg_type != 1)