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Blender Buildbot

Code signing

Code signing is done as part of INSTALL target, which makes it possible to sign files which are aimed into a bundle and coming from a non-signed source (such as libraries SVN).

This is achieved by specifying worker_codesign.cmake as a post-install script run by CMake. This CMake script simply involves an utility script written in Python which takes care of an actual signing.


Client configuration doesn’t need anything special, other than variable SHARED_STORAGE_DIR pointing to a location which is watched by a server. This is done in config_builder.py file and is stored in Git (which makes it possible to have almost zero-configuration buildbot machines).

Server configuration requires copying config_server_template.py under the name of config_server.py and tweaking values, which are platform-specific.

Windows configuration

There are two things which are needed on Windows in order to have code signing to work:


Self-signed certificate on Windows

It is easiest to test configuration using self-signed certificate.

The certificate manipulation utilities are coming with Windows SDK. Unfortunately, they are not added to PATH. Here is an example of how to make sure they are easily available:

set PATH=C:\Program Files (x86)\Windows Kits\10\App Certification Kit;%PATH%
set PATH=C:\Program Files (x86)\Windows Kits\10\bin\10.0.18362.0\x64;%PATH%

Generate CA:

makecert -r -pe -n "CN=Blender Test CA" -ss CA -sr CurrentUser -a sha256 ^
         -cy authority -sky signature -sv BlenderTestCA.pvk BlenderTestCA.cer

Import the generated CA:

certutil -user -addstore Root BlenderTestCA.cer

Create self-signed certificate and pack it into PKCS #12:

makecert -pe -n "CN=Blender Test SPC" -a sha256 -cy end ^
         -sky signature ^
         -ic BlenderTestCA.cer -iv BlenderTestCA.pvk ^
         -sv BlenderTestSPC.pvk BlenderTestSPC.cer

pvk2pfx -pvk BlenderTestSPC.pvk -spc BlenderTestSPC.cer -pfx BlenderTestSPC.pfx