[Cryptography-dev] Error with cryptography 2.5

Fri Feb 22 03:52:51 EST 2019

Hello all.

I have a question about the compatibility of cryptography 2.5

I use Python 3.4.4 with current packages to create a proxy under the old
Windows XP.

Until now, this has worked flawlessly until and including cryptography
2.4.2.

With cryptography 2.5 I get an error reported back when running the Python
script (see also below).

File  "C:ProgrammePython34libsite-packagescryptographyhazmatbindingsope

Nsslbinding.py, "line 14, in <module>

    From cryptography.hazmat.bindings. _ openssl import ffi, lib

ImportError: DLL failed load: The specified module was not found.

Is this a flaw in cryptography?

Or has support for Python 3.4.4 already been discontinued?

Can I do something to continue using current packages of cryptography?

What else needs to be installed?

Thanks and regards

Thomas Schulze

(Original Text in German)

Ich habe eine Frage zur Kompatibilität von cryptography 2.5

Ich verwende Python 3.4.4 mit aktuellen Paketen, um unter dem alten Windows
XP einen Proxy zu erstellen.

Bisher funktionierte dies einwandfrei bis einschließlich cryptography 2.4.2.

Mit cryptography 2.5 bekomme ich bereits beim Ausführen der Python-Scripte
einen Fehler zurückgemeldet (siehe auch unten).

  File
"C:\Programme\Python34\lib\site-packages\cryptography\hazmat\bindings\ope

nssl\binding.py", line 14, in <module>

    from cryptography.hazmat.bindings._openssl import ffi, lib

ImportError: DLL load failed: Das angegebene Modul wurde nicht gefunden.

Ist das ein Fehler in cryptography?

Oder wurde die Unterstützung für Python 3.4.4 bereits eingestellt?

Kann ich etwas unternehmen, um weiterhin aktuelle Pakete von cryptography zu
verwenden?

Was muß noch  installiert werden?

Danke, mit freundlichen Grüßen

Thomas Schulze

Console output with cryptography 2.4.2 (Proxy works correct)

============================================================================
==

  HTTPSProxy WinXP TLS1.2 support v1.5.2
2018-11-06

  cryptography v2.4.2  /  pyOpenSSL v19.0.0  /  urllib3 v1.24.1

  HTTPSProxy local client port: localhost:8080

  HTTPSProxy log send port: localhost:9020

============================================================================
==

Start logging:

Install cryptography 2.5 (incl.  idna)

Collecting cryptography[idna]

  Using cached
https://files.pythonhosted.org/packages/a7/5e/bd3cf6fda1860592d52

41ea2b8c6cc4e8c1fb4c576d30a8ab4d43f180121/cryptography-2.5-cp34-cp34m-win32.
whl

Collecting six>=1.4.1 (from cryptography[idna])

  Using cached
https://files.pythonhosted.org/packages/73/fb/00a976f728d0d1fecfe

898238ce23f502a721c0ac0ecfedb80e0d88c64e9/six-1.12.0-py2.py3-none-any.whl

Collecting asn1crypto>=0.21.0 (from cryptography[idna])

  Using cached
https://files.pythonhosted.org/packages/ea/cd/35485615f45f30a5105

76f1a56d1e0a7ad7bd8ab5ed7cdc600ef7cd06222/asn1crypto-0.24.0-py2.py3-none-any
.whl

Collecting cffi!=1.11.3,>=1.8 (from cryptography[idna])

  Using cached
https://files.pythonhosted.org/packages/0e/a6/1275e5c1b1af26a5048

b0a596aab56236ea4ff4119e0b89cb36180440d72/cffi-1.12.1-cp34-cp34m-win32.whl

Collecting idna>=2.1; extra == "idna" (from cryptography[idna])

  Using cached
https://files.pythonhosted.org/packages/14/2c/cd551d81dbe15200be1

cf41cd03869a46fe7226e7450af7a6545bfc474c9/idna-2.8-py2.py3-none-any.whl

Collecting pycparser (from cffi!=1.11.3,>=1.8->cryptography[idna])

Installing collected packages: six, asn1crypto, pycparser, cffi, idna,
cryptogra

phy

  Found existing installation: six 1.12.0

    Uninstalling six-1.12.0:

      Successfully uninstalled six-1.12.0

  Found existing installation: asn1crypto 0.24.0

    Uninstalling asn1crypto-0.24.0:

      Successfully uninstalled asn1crypto-0.24.0

  Found existing installation: pycparser 2.19

    Uninstalling pycparser-2.19:

      Successfully uninstalled pycparser-2.19

  Found existing installation: cffi 1.12.1

    Uninstalling cffi-1.12.1:

      Successfully uninstalled cffi-1.12.1

  Found existing installation: idna 2.8

    Uninstalling idna-2.8:

      Successfully uninstalled idna-2.8

  Found existing installation: cryptography 2.4.2

    Uninstalling cryptography-2.4.2:

      Successfully uninstalled cryptography-2.4.2

Successfully installed asn1crypto-0.24.0 cffi-1.12.1 cryptography-2.5
idna-2.8 p

ycparser-2.19 six-1.12.0

Console output with cryptography 2.5

Traceback (most recent call last):

  File "S:\2017-10-31 Projekt HTTPSProxy\3_3_1
HTTPSProxy_py_actual_test_and_bui

ld\HTTPSProxy.py", line 19, in <module>

    import OpenSSL

  File "C:\Programme\Python34\lib\site-packages\OpenSSL\__init__.py", line
8, in

<module>

    from OpenSSL import crypto, SSL

  File "C:\Programme\Python34\lib\site-packages\OpenSSL\crypto.py", line 16,
in

<module>

    from OpenSSL._util import (

  File "C:\Programme\Python34\lib\site-packages\OpenSSL\_util.py", line 6,
in <m

odule>

    from cryptography.hazmat.bindings.openssl.binding import Binding

  File
"C:\Programme\Python34\lib\site-packages\cryptography\hazmat\bindings\ope

nssl\binding.py", line 14, in <module>

    from cryptography.hazmat.bindings._openssl import ffi, lib

ImportError: DLL load failed: Das angegebene Modul wurde nicht gefunden.

All packages

altgraph==0.16.1

appdirs==1.4.3

asn1crypto==0.24.0

blessings==1.7

bpython==0.17.1

certifi==2018.11.29

cffi==1.12.1

chardet==3.0.4

colorama==0.4.1

configparser==3.7.1

cryptography==2.5

curtsies==0.3.0

dill==0.2.9

future==0.17.1

greenlet==0.4.15

idna==2.8

JsonForm==0.0.2

jsonschema==2.6.0

JsonSir==0.0.2

macholib==1.11

multiprocess==0.70.7

packaging==19.0

pefile==2018.8.8

pip==19.0.3

print==1.3.0

pyasn1==0.4.5

pycparser==2.19

Pygments==2.3.1

PyInstaller==3.4

pyOpenSSL==19.0.0

pyparsing==2.3.1

pyreadline==2.1

PySocks==1.6.8

Python-EasyConfig==0.1.7

pywin32==221

pywin32-ctypes==0.2.0

PyYAML==3.13

queuelib==1.5.0

requests==2.21.0

Resource==0.2.1

setuptools==40.8.0

six==1.12.0

typing==3.6.6

urllib3==1.24.1

wcwidth==0.1.7

wheel==0.33.1

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