Do not use cffi on Windows with Python 3.12+

Legrandin · Sep 13, 2023 · 2d3c273 · 2d3c273
1 parent fe24003
commit 2d3c273
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/lib/Crypto/Util/_raw_api.py b/lib/Crypto/Util/_raw_api.py
@@ -76,6 +76,12 @@ def address_of(self):
     if '__pypy__' not in sys.builtin_module_names and sys.flags.optimize == 2:
         raise ImportError("CFFI with optimize=2 fails due to pycparser bug.")
 
+    # cffi still uses PyUnicode_GetSize, which was removed in Python 3.12
+    # thus leading to a crash on cffi.dlopen()
+    # See https://groups.google.com/u/1/g/python-cffi/c/oZkOIZ_zi5k
+    if sys.version_info >= (3, 12) and os.name == "nt":
+        raise ImportError("CFFI is not compatible with Python 3.12 on Windows")
+
     from cffi import FFI
 
     ffi = FFI()