(VBScript) Sign a File to Create a .p7m File (using a PFX)

VBScript example to sign a file creating a .p7m file as output. The .p7m contains the signed contents of the original file. It can be verified and restored by calling VerifyP7M.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

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

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Crypt2")
set crypt = CreateObject("Chilkat.Crypt2")

' Use a digital certificate and private key from a PFX file (.pfx or .p12).
signingCertSubject = "Acme Inc"
pfxFilename = "/Users/chilkat/testData/pfx/acme.pfx"
pfxPassword = "test123"

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.CertStore")
set certStore = CreateObject("Chilkat.CertStore")
success = certStore.LoadPfxFile(pfxFilename,pfxPassword)
If (success <> 1) Then
    outFile.WriteLine(certStore.LastErrorText)
    WScript.Quit
End If

' cert is a Chilkat.Cert
Set cert = certStore.FindCertBySubjectCN(signingCertSubject)
If (certStore.LastMethodSuccess = 0) Then
    outFile.WriteLine("Failed to find certificate by subject common name.")
    WScript.Quit
End If

' Tell the crypt component to use this cert.
success = crypt.SetSigningCert(cert)

' We can sign any type of file, creating a .p7m as output:
inFile = "/Users/chilkat/testData/pdf/sample.pdf"
outputFile = "/Users/chilkat/testData/p7m/sample.pdf.p7m"
success = crypt.CreateP7M(inFile,outputFile)
If (success = 0) Then
    outFile.WriteLine(crypt.LastErrorText)

    WScript.Quit
End If

' Verify and restore the original file:
success = crypt.SetVerifyCert(cert)

inFile = outputFile
outputFile = "/Users/chilkat/testData/pdf/restored.pdf"

success = crypt.VerifyP7M(inFile,outputFile)
If (success = 0) Then
    outFile.WriteLine(crypt.LastErrorText)

    WScript.Quit
End If

outFile.WriteLine("Success!")

outFile.Close