Howdy requires older CV python module

English Applications
1

I update my system far ago and howdy stop working. There is no module cv2. I investigate that my system update opencv lib to version 3.
I known, that I install howdy from no default repo, but maybe there is a way to solve my problem?
I search in PIP, but it complains the environment is management externally. I use zypper search cv2, but without result.
Is there any way to configure howdy without code compilation?

maj 25 12:55:19 opensuse [23486]: Attempting facial authentication for user slawomir
maj 25 12:55:19 opensuse kwin_wayland_wrapper[23563]: Traceback (most recent call last):
maj 25 12:55:19 opensuse kwin_wayland_wrapper[23563]:   File "/usr/lib64/security/howdy/compare.py", line 18, in <module>
maj 25 12:55:19 opensuse kwin_wayland_wrapper[23563]:     import cv2
maj 25 12:55:19 opensuse kwin_wayland_wrapper[23563]: ModuleNotFoundError: No module named 'cv2'
maj 25 12:55:19 opensuse [23486]: Failure, unknown error1

I see I can create venv. So create environment in /opt/howdy as root, install packages and mess up with pam to load howdy in virtual environment?

I do:

sudo python3.13 -m venv /opt/howdy
sudo /opt/howdy/bin/pip install cv2
ERROR: Could not find a version that satisfies the requirement cv2 (from versions: none)

[notice] A new release of pip is available: 25.0.1 -> 25.1.1
[notice] To update, run: python3.13 -m pip install --upgrade pip
ERROR: No matching distribution found for cv2
slawomir@opensuse:~> sudo /opt/howdy/bin/pip install --upgrade pip
Requirement already satisfied: pip in /opt/howdy/lib64/python3.13/site-packages (25.0.1)
Collecting pip
  Downloading pip-25.1.1-py3-none-any.whl.metadata (3.6 kB)
Downloading pip-25.1.1-py3-none-any.whl (1.8 MB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1.8/1.8 MB 2.7 MB/s eta 0:00:00
Installing collected packages: pip
  Attempting uninstall: pip
    Found existing installation: pip 25.0.1
    Uninstalling pip-25.0.1:
      Successfully uninstalled pip-25.0.1
Successfully installed pip-25.1.1
slawomir@opensuse:~> sudo /opt/howdy/bin/pip install cv2
ERROR: Could not find a version that satisfies the requirement cv2 (from versions: none)
ERROR: No matching distribution found for cv2

Module cv was installed, but I am doubt if it is for opencv.

2

https://stackoverflow.com/questions/57883178/how-can-i-install-cv2

I do:

sudo /opt/howdy/bin/pip install opencv-python
Collecting opencv-python
  Downloading opencv_python-4.11.0.86-cp37-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl.metadata (20 kB)
Collecting numpy>=1.21.2 (from opencv-python)
  Downloading numpy-2.2.6-cp313-cp313-manylinux_2_17_x86_64.manylinux2014_x86_64.whl.metadata (62 kB)
Downloading opencv_python-4.11.0.86-cp37-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (63.0 MB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 63.0/63.0 MB 10.3 MB/s eta 0:00:00
Downloading numpy-2.2.6-cp313-cp313-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (16.5 MB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 16.5/16.5 MB 16.1 MB/s eta 0:00:00
Installing collected packages: numpy, opencv-python
Successfully installed numpy-2.2.6 opencv-python-4.11.0.86

But in /etc/pam.d/kde is used pam_python3.so, which is shared object, not executable. How to force to use my virtual environment? Maybe can I wrote my own orapper around /usr/lib64/security/howdy/pam.py and alter python module search path?

3 
> cat /etc/pam.d/kde
auth     [success=done ignore=ignore default=bad] pam_selinux_permit.so
auth sufficient pam_unix.so try_first_pass likeauth nullok
#auth sufficient pam_python3.so /usr/lib64/security/howdy/pam.py

auth sufficient pam_python3 /opt/howdy/slawomir-howdy-start

#auth     include        common-auth
account  include        common-account
password include        common-password
session  include        common-session

And:

> cat /opt/howdy/slawomir-howdy-start 
#!/usr/bin/python3

import sys
sys.path.append('/opt/howdy/lib64/python3.13/site-packages')

exec(open('/usr/lib64/security/howdy/pam.py').read())
4

The Python shared library that pam_python.so uses is statically defined during compilation.

5

So add symbolic link in place, where it search modules? Sorry, but my English knowledge is small.