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Marc Rufer

Software engineer
@d-fens GmbH

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HOWTO Sign PowerShell Script with SuisseID

Marc Rufer 25 Nov 2015 PowerShell SuisseID

At d-fens, the company I’m working for, we all have a SuisseID, which can be used for different purposes like authentication and electronical signing purposes. It’s as well possible to sign code with the SuisseID. The advantages of using the SuisseID for code signing are that the SuisseID is a very cheap in comparison to other code signing certificates and that the user gets authenticated personally. The following section describes the necessary step to sign a PowerShell script on Windows by using your SuisseID.

To sign code with your SuisseId using PowerShell your SuisseId has to be installed on your computer and as well has to be connected with your computer.

  1. Open the Microsoft Management Console (mmc.exe)
  2. Press Ctrl + m
  3. Add Certificates to the Selected snap-ins
  4. On pop up select My User Account
  5. Open the certificates tree and navigate to Personal\Certificates
  6. Select the SuisseId Qualified Signature certificate (Issued by SwissSign Qualified Platinum CA 2010 - G2)
  7. Right click -> Properties
  8. In General tab select the radio button Enable only the following purposes
  9. Apply
  10. Open a new PowerShell session (Run as administrator)
  11. Get your code signing certificate by executing the following command

    $cert = Get-ChildItem cert:\CurrentUser\my -CodeSigningCert

  12. Sign PowerShell script file by executing the following command

    Set-AuthenticodeSignature -FilePath C:\PathToTheFile\SomeFile.ps1 -Certificate $cert

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