pyconcrete

Protect your python script, encrypt .pyc to .pye and decrypt when import it

Protect python script work flow

• your_script.py import pyconcrete
• pyconcrete will hook import module
• when your script do import MODULE, pyconcrete import hook will try to find MODULE.pye first and then decrypt MODULE.pye via _pyconcrete.pyd and execute decrypted data (as .pyc content)
• encrypt & decrypt secret key record in _pyconcrete.pyd (like DLL or SO) the secret key would be hide in binary code, can't see it directly in HEX view

Encryption

• only support AES 128 bit now
• encrypt & decrypt by library OpenAES

Installation

• need to input your passphrase create secret key for encrypt python script.
• same passphrase will generate the same secret key
• installation will add pyconcrete.pth into your site-packages for execute sitecustomize.py under pyconcrete which will automatic import pyconcrete

pip

You must set up environment variable PYCONCRETE_PASSPHRASE for installation continuously.

$ PYCONCRETE_PASSPHRASE=<your passphrase here> pip install pyconcrete

or, if you use an old pip version that supports --egg:

$ pip install pyconcrete --egg --install-option="--passphrase=<your passphrase>"

pyconcrete installed as egg, if you want to uninstall pyconcrete will need to manually delete pyconcrete.pth.

source

• get the pyconcrete source code

$ git clone <pyconcrete repo> <pyconcre dir>

• install pyconcrete

$ python setup.py install

Usage

Full encrypted

• convert all of your .py to *.pye

$ pyconcrete-admin.py compile --source=<your py script>  --pye
$ pyconcrete-admin.py compile --source=<your py module dir> --pye

• remove *.py *.pyc or copy *.pye to other folder
• main.py encrypted as main.pye, it can't be executed by normal python. You must use pyconcrete to process the main.pye script. pyconcrete(exe) will be installed in your system path (ex: /usr/local/bin)

pyconcrete main.pye
src/*.pye  # your libs

Partial encrypted (pyconcrete as lib)

• download pyconcrete source and install by setup.py

$ python setup.py install \
  --install-lib=<your project path> \
  --install-scripts=<where you want to execute pyconcrete-admin.py and pyconcrete(exe)>

• import pyconcrete in your main script
  • recommendation project layout

main.py       # import pyconcrete and your lib
pyconcrete/*  # put pyconcrete lib in project root, keep it as original files
src/*.pye     # your libs

Test

• test in local

$ ./pyconcrete-admin.py test

• test in docker environment

$ ./bin/run-test.sh

• add test case for pyconcrete.exe
  • reference exists test case
  • add folder in test/exe_testcases/
  • add testing code at test/exe_testcases/src/main.py
  • add validator at test/exe_testcases/validator.py

Example

Django with pyconcrete

Building on Linux

Python 3.7 - fix Ubuntu 14.04 build error

x86_64-linux-gnu-gcc: error: unrecognized command line option `-fstack-protector-strong`

Reference by Stackoverflow solution

• you should install gcc-4.9 first
• symlink /usr/bin/x86_64-linux-gnu-gcc to gcc-4.9
• build pycocnrete again
• rollback symlink

Building on Windows

Python 2.7 - Visual Studio 2008

https://www.microsoft.com/en-us/download/details.aspx?id=44266

• Open VS2008 Command Prompt
• set DISTUTILS_USE_SDK=1
• set SET MSSdk=1
• create distutils.cfg and put inside

  [build]
  compiler=msvc
  

Python 3.5, 3.6, 3.7 - Visual Studio 2015

MSVC 2015 Build Tools

Document

• make sure setuptools >= 24.0

  python -c 'import setuptools; print(setuptools.__version__)'

• Open VS2015 Build Tools Command Prompt

• set DISTUTILS_USE_SDK=1

• setenv /x64 /release or setenv /x86 /release

Reference

https://matthew-brett.github.io/pydagogue/python_msvc.html https://github.com/cython/cython/wiki/CythonExtensionsOnWindows

Announcement

pyconcrete is an experimental project, there is always a way to decrypt .pye files, but pyconcrete just make it harder.