Fix regex metacharacters in enums

IBM · Jun 5, 2024 · 8e65354 · 8e65354
1 parent 088e561
commit 8e65354
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Showing 2 changed files with 11 additions and 1 deletion.
diff --git a/jsonsubschema/_canonicalization.py b/jsonsubschema/_canonicalization.py
@@ -7,6 +7,7 @@
 import jsonschema
 import numbers
 import math
+import re
 import sys
 
 import jsonsubschema._constants as definitions
@@ -272,7 +273,7 @@ def rewrite_enum(d):
     ret = None
 
     if t == "string":
-        pattern = "|".join(map(lambda x: "^"+str(x)+"$", enum))
+        pattern = "|".join(map(lambda x: "^"+str(re.escape(x))+"$", enum))
         ret = {"type": "string", "pattern": pattern}
 
     if t == "integer":

diff --git a/test/test_enum.py b/test/test_enum.py
@@ -85,6 +85,15 @@ def test_enum_uninhabited4(self):
         with self.subTest('LHS > RHS'):
             self.assertTrue(isSubschema(s2, s1))
 
+    def test_enum_regex_string(self):
+        s1 = {'enum': ['^*']}
+        s2 = {'enum': ['^^']}
+
+        with self.subTest('LHS < RHS'):
+            self.assertFalse(isSubschema(s1, s2))
+        with self.subTest('LHS > RHS'):
+            self.assertFalse(isSubschema(s2, s1))
+
 
 class TestEnumNotSupported(unittest.TestCase):