1 files changed, 18 insertions, 0 deletions
diff --git a/src/asn1/asn1_alt.cpp b/src/asn1/asn1_alt.cpp
index 1fccf6ac0..1fc1f66e2 100644
--- a/src/asn1/asn1_alt.cpp
+++ b/src/asn1/asn1_alt.cpp
@@ -17,6 +17,24 @@
 
 namespace Botan {
 
+namespace {
+
+/*
+* Check if type is a known ASN.1 string type
+*/
+bool is_string_type(ASN1_Tag tag)
+   {
+   return (tag == NUMERIC_STRING ||
+           tag == PRINTABLE_STRING ||
+           tag == VISIBLE_STRING ||
+           tag == T61_STRING ||
+           tag == IA5_STRING ||
+           tag == UTF8_STRING ||
+           tag == BMP_STRING);
+   }
+
+}
+
 /*
 * Create an AlternativeName
 */