File CVE-2022-45061-fix-quadratic-time-idna-decoding... of Package python-base

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File CVE-2022-45061-fix-quadratic-time-idna-decoding.patch of Package python-base

Index: Python-2.7.18/Lib/encodings/idna.py
===================================================================
--- Python-2.7.18.orig/Lib/encodings/idna.py
+++ Python-2.7.18/Lib/encodings/idna.py
@@ -39,23 +39,22 @@ def nameprep(label):
 
     # Check bidi
     RandAL = map(stringprep.in_table_d1, label)
-    for c in RandAL:
-        if c:
-            # There is a RandAL char in the string. Must perform further
-            # tests:
-            # 1) The characters in section 5.8 MUST be prohibited.
-            # This is table C.8, which was already checked
-            # 2) If a string contains any RandALCat character, the string
-            # MUST NOT contain any LCat character.
-            if filter(stringprep.in_table_d2, label):
-                raise UnicodeError("Violation of BIDI requirement 2")
+    if any(RandAL):
+        # There is a RandAL char in the string. Must perform further
+        # tests:
+        # 1) The characters in section 5.8 MUST be prohibited.
+        # This is table C.8, which was already checked
+        # 2) If a string contains any RandALCat character, the string
+        # MUST NOT contain any LCat character.
+        if filter(stringprep.in_table_d2, label):
+            raise UnicodeError("Violation of BIDI requirement 2")
 
-            # 3) If a string contains any RandALCat character, a
-            # RandALCat character MUST be the first character of the
-            # string, and a RandALCat character MUST be the last
-            # character of the string.
-            if not RandAL[0] or not RandAL[-1]:
-                raise UnicodeError("Violation of BIDI requirement 3")
+        # 3) If a string contains any RandALCat character, a
+        # RandALCat character MUST be the first character of the
+        # string, and a RandALCat character MUST be the last
+        # character of the string.
+        if not RandAL[0] or not RandAL[-1]:
+            raise UnicodeError("Violation of BIDI requirement 3")
 
     return label
 
Index: Python-2.7.18/Lib/test/test_codecs.py
===================================================================
--- Python-2.7.18.orig/Lib/test/test_codecs.py
+++ Python-2.7.18/Lib/test/test_codecs.py
@@ -1318,6 +1318,12 @@ class IDNACodecTest(unittest.TestCase):
         self.assertEqual(u"pyth\xf6n.org".encode("idna"), "xn--pythn-mua.org")
         self.assertEqual(u"pyth\xf6n.org.".encode("idna"), "xn--pythn-mua.org.")
 
+    def test_builtin_decode_length_limit(self):
+        with self.assertRaisesRegexp(UnicodeError, "too long"):
+            (b"xn--016c"+b"a"*1100).decode("idna")
+        with self.assertRaisesRegexp(UnicodeError, "too long"):
+            (b"xn--016c"+b"a"*70).decode("idna")
+            
     def test_stream(self):
         import StringIO
         r = codecs.getreader("idna")(StringIO.StringIO("abc"))

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File CVE-2022-45061-fix-quadratic-time-idna-decoding.patch of Package python-base

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