From 10fa404f5e19ab234ad559977fb8b2df717c56b8 Mon Sep 17 00:00:00 2001
From: yuki-mogi-ffri <yuki.mogi@ffri.jp>
Date: Tue, 23 Apr 2024 15:05:30 +0900
Subject: [PATCH] fix ASN1Reader::tag2str

Now ASN1Reader::tag2str function returns MBEDTLS_ASN1_UNKNOWN instead of throwing an out-of-range exception if the size of  is less than 3.
---
 src/BinaryStream/ASN1Reader.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/BinaryStream/ASN1Reader.cpp b/src/BinaryStream/ASN1Reader.cpp
index f9973f1ab8..63551c4b9d 100644
--- a/src/BinaryStream/ASN1Reader.cpp
+++ b/src/BinaryStream/ASN1Reader.cpp
@@ -473,6 +473,10 @@ std::string ASN1Reader::tag2str(int tag) {
   HANDLE(ASN1_CONSTRUCTED);
   HANDLE(ASN1_CONTEXT_SPECIFIC);
 
+  if (tag_str.size() < 3) {
+    return "MBEDTLS_ASN1_UNKNOWN";
+  }
+
   return tag_str.substr(3);
 #undef HANDLE
 }