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Windows Code Signing GitHub Action

This is an updated and stripped down version of https://github.com/dlemstra/code-sign-action via https://github.com/vespakoen/code-sign-action/commit/36116b6c909e1f6decd8584a798e4feec15835fe.

This action signs .exe files in the specified directory using signtool.exe. This works on Windows only. The cert and password must be provided via secrets.

The files being signed are overwritten with their signed copy.

How to prepare a certificate

Assuming that you have a valid .pfx file,

  1. run certutil -encode my_cert.pfx my_cert_as_base64.txt
  2. open my_cert_as_base64.txt and remove the header/footer, e.g. "-----BEGIN CERTIFICATE-----"
  3. remove all new line chars to make it a single continuous string
  4. copy-paste the string into the "secret" on GitHub

This code does not parse the contents of the base64 cert - it decodes it and saves as a binary .pfx file for signtool to use.

Inputs

certificate

Required The base64 encoded certificate as a single base64, no header, footer or line breaks.

password

Required Certificate's password. Optional, but you really should have one.

folder

Required The folder that contains the files to sign, e.g. target\release or ...

Example usage

runs-on: windows-latest
steps:
  uses: stackmuncher/code-sign-action
  with:
    certificate: '${{ secrets.WIN_CERT_B64 }}'
    password: '${{ secrets.WIN_CERT_B64_P }}'
    folder: '.'