CkPython Requires Chilkat v11.7.0+

Authenticode Sign a PowerShell Script (.ps1, .psm1, .psd1)

See more Code Signing Examples

Demonstrates how to Authenticode sign a PowerShell script. PowerShell scripts (.ps1), modules (.psm1) and data files (.psd1) can be signed starting in Chilkat v11.7.0. The signature is appended to the file as a comment block, and the file keeps its text encoding. CkPython

import sys
import chilkat

success = False

#  This example requires the Chilkat API to have been previously unlocked.
#  See Global Unlock Sample for sample code.

#  Signing PowerShell files requires Chilkat v11.7.0 or later.
#  The same code signs a script (.ps1), a module (.psm1), or a data file (.psd1).

#  Load the code signing certificate.  It must have access to its private key.
cert = chilkat.CkCert()
success = cert.LoadPfxFile("C:/someDir/myCodeSigningCert.pfx","pfx password")
if (success == False):
    print(cert.lastErrorText())
    sys.exit()

#  Sign with SHA256, and ask a timestamp authority for a timestamp.  A timestamp lets the
#  signature continue to validate after the code signing certificate has expired.
#  
#  {
#    "hashAlg": "sha256",
#    "timestampToken": {
#      "enabled": true,
#      "tsaUrl": "http://timestamp.digicert.com",
#      "requestTsaCert": true,
#      "hashAlg": "sha256"
#    }
#  }
json = chilkat.CkJsonObject()
json.UpdateString("hashAlg","sha256")
json.UpdateBool("timestampToken.enabled",True)
json.UpdateString("timestampToken.tsaUrl","http://timestamp.digicert.com")
json.UpdateBool("timestampToken.requestTsaCert",True)
json.UpdateString("timestampToken.hashAlg","sha256")

scriptPath = "C:/someDir/Deploy.ps1"

signer = chilkat.CkCodeSign()

#  The script is modified in place.  The signature is appended to the end of the file as a comment block:
#  
#    # SIG # Begin signature block
#    # MIIoKgYJKoZIhvcNAQcCoIIoGzCCKBcCAQExDzANBglghkgBZQMEAgEFADB5Bgor
#    # ...
#    # SIG # End signature block
#  
#  The text encoding of the file (UTF-8, UTF-8 with BOM, or UTF-16) is kept.
#  If the script is already signed, the new signature block replaces the existing one.
success = signer.AddSignature(scriptPath,cert,json)
if (success == False):
    print(signer.lastErrorText())
    sys.exit()

print("Signed the PowerShell script.")

#  Verify the signature that was just added.
#  Any change made to the script after it is signed, even to a comment, invalidates the signature.
sigInfo = chilkat.CkJsonObject()
valid = signer.VerifySignature(scriptPath,sigInfo)
if (valid == False):
    print(signer.lastErrorText())
    sys.exit()

print("The signature is valid.")