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I am who I say I am because my CA says so


Overview

This article describes the use of self-signed code signing certificates on Microsoft Windows operating systems.

Kleopatra UI

See https://www.deepdotweb.com/2015/02/21/pgp-tutorial-for-windows-kleopatra-gpg4win/

Create self-signed cert on Windows

Based on http://www.hanselman.com/blog/SigningPowerShellScripts.aspx

  1. On Windows machines, in directory “C:\Program Files\Microsoft Visual Studio 8\SDK\v2.0\Bin" invoke the makecert.exe GUI.

  2. Setup a Certificate Authority (CA):

    
    makecert -n "CN=PowerShell Local Certificate Root" -a sha1 -eku 1.3.6.1.5.5.7.3.3 -r -sv root.pvk root.cer -ss Root -sr localMachine
    
    
    
  3. Type in a Password twice for the Subject Key.

  4. Type it in again.

    See the cert under “Trusted root CA”.

  5. Generates a personal certificate from the above certificate authority:

    
    makecert -pe -n "CN=PowerShell User" -ss MY -a sha1 -eku 1.3.6.1.5.5.7.3.3 -iv root.pvk -ic root.cer   
    
  6. Type in a password for the Issuer Signature.

    See the cert under Personal.

  7. Invoke mmc.exe, and add the Certificates snap-in for “My user account” to view certificates.

  8. Verify the certificate is known within PowerShell:

    
    Get-ChildItem cert:\CurrentUser\My -codesign   
    
  9. Delete in your working directory temporary files root.pvk and root.cer.

    The certificate info is stored with that of others, in “C:\Documents and Settings[username]\Application Data\Microsoft\SystemCertificates\My".

  10. Sign a script, replacing “c:\foo.ps1” with the full path to your script:

    Set-AuthenticodeSignature c:\foo.ps1 @(Get-ChildItem cert:\CurrentUser\My -codesign)[0]

  11. Use a text editor to view the script, which now has a signature block that begins with:

    # SIG # Begin signature block"
    

Export for running elsewhere

PROTIP: When sending a script, also send along its Powershell certificates in the Trusted Root Certification Authorities container.
Also send the Trusted Publishers file to prevent the first-time prompt from appearing.

  1. Right-click and select Export for the Certificate Export Wizard GUI.

  2. Leave “DER encoded binary X.509 (.CER)” selected and click Next.

  3. Specify the file name after a full path and click Next.

    PROTIP: It helps if everyone in an organization makes use of a company-standard folder.

  4. Click Finish.

  5. Click OK to the “The export was successful” pop-up.

    Verify a signed script can be used

  6. Set

    Set-ExecutionPolicy AllSigned

More on DevOps

This is one of a series on DevOps:

  1. DevOps_2.0
  2. ci-cd (Continuous Integration and Continuous Delivery)
  3. User Stories for DevOps

  4. Git and GitHub vs File Archival
  5. Git Commands and Statuses
  6. Git Commit, Tag, Push
  7. Git Utilities
  8. Data Security GitHub
  9. GitHub API
  10. TFS vs. GitHub

  11. Choices for DevOps Technologies
  12. Java DevOps Workflow
  13. AWS DevOps (CodeCommit, CodePipeline, CodeDeploy)
  14. AWS server deployment options

  15. Digital Ocean
  16. Cloud regions
  17. AWS Virtual Private Cloud
  18. Azure Cloud Onramp
  19. Azure Cloud
  20. Azure Cloud Powershell

  21. Packer automation to build Vagrant images
  22. Terraform multi-cloud provisioning automation

  23. Powershell Ecosystem
  24. Powershell on MacOS
  25. Powershell Desired System Configuration

  26. Jenkins Server Setup
  27. Jenkins Plug-ins
  28. Jenkins Freestyle jobs
  29. Jenkins2 Pipeline jobs using Groovy code in Jenkinsfile

  30. Dockerize apps
  31. Docker Setup
  32. Docker Build

  33. Maven on MacOSX

  34. Ansible

  35. MySQL Setup

  36. SonarQube static code scan

  37. API Management Microsoft
  38. API Management Amazon

  39. Scenarios for load