(PowerShell) Extract XML File from a .p7m (e.g. FATTURA ELETTRONICA, ITALY)

PowerShell example to extract the original file from a .p7m (Signed-Data PKCS7 Format) The .p7m contains the signed contents of the original file.

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

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

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

$crypt = New-Object Chilkat.Crypt2

$outputFile = "testData/xml/original.xml"
$inFile = "testData/p7m/fattura_signature.p7m"

# Verify the signature and extract the XML file.
$success = $crypt.VerifyP7M($inFile,$outputFile)
if ($success -eq $false) {
    $($crypt.LastErrorText)
    exit
}

$("Success!")