VB.NET 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. VB.NET

Dim success As Boolean = 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.
Dim cert As New Chilkat.Cert
success = cert.LoadPfxFile("C:/someDir/myCodeSigningCert.pfx","pfx password")
If (success = False) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


'  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"
'    }
'  }
Dim json As New Chilkat.JsonObject
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")

Dim scriptPath As String = "C:/someDir/Deploy.ps1"

Dim signer As New Chilkat.CodeSign

'  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) Then
    Debug.WriteLine(signer.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("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.
Dim sigInfo As New Chilkat.JsonObject
Dim valid As Boolean = signer.VerifySignature(scriptPath,sigInfo)
If (valid = False) Then
    Debug.WriteLine(signer.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("The signature is valid.")