pycryptodome fails with google appengine cloud SDK, pycrypto works

[katzlbt (Dr. Thomas)]

Google appengine standard environment (Google cloud SDK) uses a sandbox that prohibits the use of _ctype. pycryptodome uses _ctype, which fails to import in the cloud sdk sandbox "ImportError: No module named _ctypes". This was really hard to diagnose correctly.

This incompatibility should be documented in the package descriptions of both ports, as pycryptodome is not a 100% replacement for pycrypto.

WORKAROUND: download and manually build pycrypto-2.6.1

Traceback (most recent call last):
  File "/Users/cat/google-cloud-sdk/platform/google_appengine/python27/sdk/google/appengine/runtime/wsgi.py", line 238, in Handle
    handler = _config_handle.add_wsgi_middleware(self._LoadHandler())
  File "/Users/cat/google-cloud-sdk/platform/google_appengine/python27/sdk/google/appengine/runtime/wsgi.py", line 309, in _LoadHandler
    handler, path, err = LoadObject(self._handler)
  File "/Users/cat/google-cloud-sdk/platform/google_appengine/python27/sdk/google/appengine/runtime/wsgi.py", line 83, in LoadObject
    obj = __import__(path[0])
  File "/Users/cat/repositories/locandy-web/app/main.py", line 65, in <module>
    pyramid_config = app_config()
  File "/Users/cat/repositories/locandy-web/app/main.py", line 31, in app_config
    config.include('pyramid_beaker') # --> includeme: of pyramid_beaker
  File "distlib/pyramid/config/__init__.py", line 808, in include
    c = self.maybe_dotted(callable)
  File "distlib/pyramid/config/__init__.py", line 912, in maybe_dotted
    return self.name_resolver.maybe_resolve(dotted)
  File "distlib/pyramid/path.py", line 320, in maybe_resolve
    return self._resolve(dotted, package)
  File "distlib/pyramid/path.py", line 327, in _resolve
    return self._zope_dottedname_style(dotted, package)
  File "distlib/pyramid/path.py", line 376, in _zope_dottedname_style
    found = __import__(used)
  File "distlib/pyramid_beaker/__init__.py", line 3, in <module>
    from beaker import cache
  File "distlib/beaker/cache.py", line 15, in <module>
    from beaker.crypto.util import sha1
  File "distlib/beaker/crypto/__init__.py", line 9, in <module>
    from beaker.crypto.pycrypto import getKeyLength, aesEncrypt, aesDecrypt
  File "distlib/beaker/crypto/pycrypto.py", line 17, in <module>
    from Crypto.Cipher import AES
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/Crypto/Cipher/__init__.py", line 27, in <module>
    from Crypto.Cipher._mode_ecb import _create_ecb_cipher
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/Crypto/Cipher/_mode_ecb.py", line 29, in <module>
    from Crypto.Util._raw_api import (load_pycryptodome_raw_lib,
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/Crypto/Util/_raw_api.py", line 164, in <module>
INFO     2023-10-24 14:16:28,661 module.py:862] default: "GET /_ah/warmup HTTP/1.1" 500 1919
    import ctypes
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ctypes/__init__.py", line 7, in <module>
    from _ctypes import Union, Structure, Array
  File "/Users/cat/google-cloud-sdk/platform/google_appengine/python27/sdk/google/appengine/tools/devappserver2/python/runtime/sandbox.py", line 1144, in load_module
    raise ImportError('No module named %s' % fullname)
ImportError: No module named _ctypes