pgn: Improve validation of symbol tokens for tag names

niklasf · Jul 9, 2022 · 77794ce · 77794ce
1 parent 43dc84a
commit 77794ce
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/chess/pgn.py b/chess/pgn.py
@@ -93,9 +93,9 @@
 NAG_NOVELTY = 146
 
 
-TAG_REGEX = re.compile(r"^\[([A-Za-z0-9_+#=:-]+)\s+\"([^\r]*)\"\]\s*$")
+TAG_REGEX = re.compile(r"^\[([A-Za-z0-9][A-Za-z0-9_+#=:-]{,254})\s+\"([^\r]*)\"\]\s*$")
 
-TAG_NAME_REGEX = re.compile(r"^[A-Za-z0-9_+#=:-]+\Z")
+TAG_NAME_REGEX = re.compile(r"^[A-Za-z0-9][A-Za-z0-9_+#=:-]{,254}\Z")
 
 MOVETEXT_REGEX = re.compile(r"""
     (