Fixed issue with md4

Author: dhondta

src/codext/__common__.py

@@ -35,6 +35,11 @@
     from importlib import reload
 except ImportError:
     pass
+try:  # from Python 3.11, it seems that 'sre_parse' is not bound to 're' anymore
+    re.sre_parse
+except AttributeError:
+    import sre_parse as __sre_parse
+    re.sre_parse = __sre_parse
 
 
 __all__ = ["add", "add_macro", "add_map", "b", "clear", "codecs", "decode", "encode", "ensure_str", "examples", "guess",

src/codext/hashing/md.py

@@ -55,6 +55,7 @@ def md2(data):
 
 
 add("md2", lambda s, error="strict": (md2(s), len(s)), guess=None)
-add("md4", lambda s, error="strict": (hashlib.new("md4", b(s)).hexdigest(), len(s)), guess=None)
 add("md5", lambda s, error="strict": (hashlib.new("md5", b(s)).hexdigest(), len(s)), guess=None)
+if "md4" in hashlib.algorithms_available:
+    add("md4", lambda s, error="strict": (hashlib.new("md4", b(s)).hexdigest(), len(s)), guess=None)
 

tests/test_manual.py

@@ -3,6 +3,7 @@
 """Manual codec tests.
 
 """
+import hashlib
 import os
 import random
 from six import binary_type, string_types
@@ -105,7 +106,7 @@ def test_codec_dummy_str_manips(self):
 
     def test_codec_hash_functions(self):
         STR = b"This is a test string!"
-        for h in ["adler32", "md2", "md4", "md5", "sha1", "sha224", "sha256", "sha384", "sha512"]:
+        for h in ["adler32", "md2", "md5", "sha1", "sha224", "sha256", "sha384", "sha512"]:
             self.assertIsNotNone(codecs.encode(STR, h))
             self.assertRaises(NotImplementedError, codecs.decode, STR, h)
         if PY3: