fix: 🐛 check if original exist

SigmaHQ · Nov 15, 2024 · 7dc6d92 · 7dc6d92
1 parent 41ec5ba
commit 7dc6d92
Showing 1 changed file with 10 additions and 2 deletions.
diff --git a/sigma/types.py b/sigma/types.py
@@ -584,10 +584,18 @@ def to_regex(self, custom_escaped: str = "") -> "SigmaRegularExpression":
         )
 
     def upper(self) -> "SigmaString":
-        return SigmaString(self.original.upper())
+        if self.original:
+            return SigmaString(self.original.upper())
+        else:
+            original= self.to_plain()
+            return SigmaString(original.upper())    
 
     def lower(self) -> "SigmaString":
-        return SigmaString(self.original.lower())
+        if self.original:
+            return SigmaString(self.original.lower())
+        else:
+            original= self.to_plain()
+            return SigmaString(original.lower())
 
 
 class SigmaCasedString(SigmaString):