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Windows Python

Create Self-Signed Certificates for RNWFxx using Python

Creating self-signed device certificates is semi-automated and only takes a few seconds.

Running the included Python script, ".\CertificateTool\mosquittoCSR.py" will create the required

Software

  • Windows 10 or later.

  • Python 3.10.11 or later. Other versions may work, but have not been tested.

    • Select "Add python.exe to PATH during installation [Recommended]

  • Windows Terminal (cmd.exe A better version of cmd.exe) [Optional]

Procedure

  1. Open a command prompt in the folder ...\RNWFxx_Python_OOB\tools\CertificateTool

  2. Execute the Python script with the command line: python mosquittoCSR.py

  3. If the script detects missing required Python modules, the user will be prompted to install them.

    Once installed, rerun the script to proceed.

  4. Next the user is prompted to verify the default certificate settings.

    • If acceptable, press 'Y' [ENTER]
    • If not, press 'N' [ENTER] to exit the script.

      • Edit the values in the Python script, save and rerun.

  5. At the next prompt, open the displayed link in a browser and press [ENTER].

    URL: https://test.mosquitto.org/ssl/

  6. Press [ENTER] to complete the certificate creation process.

  7. The final screen should appear as shown.

    Take note of Option 1. The "CSR" created, has already been copied to your clipboard!
    test.mosquitto.org TLS Cert Tool open in a browser.

    Right-Click in the control and paste the 'CSR' text from the clipboard.

    OR

    Open the file ClientCSR.pem file, copy the contents from a text editor and then paste.
    ClientCSR.pem pasted into the tool.

    Then press Submit
    At the file save prompt, select a folder of your choice and save the file with the name
    ...\RNWFxx_Python_OOB\tools\CertificateTool\ClientCert.crt

  8. The final step is to download the mosquitto.org.crt certificate.

    • Click on the hyperlink above for a direct download of the mosquitto.org.crt certificate.

      OR

    • Navigate to the test.mosquitto.org web site and click on the PEM Formatcertificate link.


    At the download prompt, save the certificate with filename mosquitto.crt in the
    same folder as the previous certificate files eg:
    ...\RNWFxx_Python_OOB\tools\CertificateTool\
    All the required certificates for the demo should be in this folder.
    ClientCert.crt, ClientKey.crt, and mosquitto.crt.

    Recommended: Make a backup of these certificates in a different folder,
    so they do not get overwritten if the script is run again

Return to the Python OOBDemo...