(VBScript) Extract XML string from a .p7m byte array (e.g. FATTURA ELETTRONICA, ITALY)

VBScript example to extract the original XML from a .p7m (Signed-Data PKCS7 Format) provided as a byte array.

One use for this example is to extract the original XML from a Fattura Elettronica .p7m signature.

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.FileAccess")
set fac = CreateObject("Chilkat.FileAccess")

p7mBytes = fac.ReadEntireFile("testData/p7m/fattura_signature.p7m")
If (fac.LastMethodSuccess <> 1) Then
    outFile.WriteLine(fac.LastErrorText)
    WScript.Quit
End If

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

originalXml = crypt.OpaqueVerifyString(p7mBytes)
If (crypt.LastMethodSuccess <> 1) Then
    outFile.WriteLine(fac.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine("Original XML:")
outFile.WriteLine(originalXml)

outFile.WriteLine("Success!")

outFile.Close