(PowerShell) FatturaPA XML Invoice Sign+Encrypt to P7M

Demonstrates how to create a CAdES BES signed + encrypted invoice.xml.p7m for the Italian FatturaPA exchange system.

Note: This example requires Chilkat v9.5.0.75 or greater.

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

# Note: Requires Chilkat v9.5.0.75 or greater.

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

$crypt = New-Object Chilkat.Crypt2

# Use a digital certificate and private key from a PFX file (.pfx or .p12).
$pfxPath = "qa_data/pfx/cert_test123.pfx"
$pfxPassword = "test123"

$cert = New-Object Chilkat.Cert
$success = $cert.LoadPfxFile($pfxPath,$pfxPassword)
if ($success -ne $true) {
    $($cert.LastErrorText)
    exit
}

# Provide the signing cert (with associated private key).
$success = $crypt.SetSigningCert($cert)
if ($success -ne $true) {
    $($crypt.LastErrorText)
    exit
}

# Indicate that SHA-256 should be used.
$crypt.HashAlgorithm = "sha256"

# Specify the signed attributes to be included.
# (This is what makes it CAdES-BES compliant.)
$jsonSignedAttrs = New-Object Chilkat.JsonObject
$jsonSignedAttrs.UpdateInt("contentType",1)
$jsonSignedAttrs.UpdateInt("signingTime",1)
$jsonSignedAttrs.UpdateInt("messageDigest",1)
$jsonSignedAttrs.UpdateInt("signingCertificateV2",1)
$crypt.SigningAttributes = $jsonSignedAttrs.Emit()

$inFile = "qa_data/xml/IT01234567890_11002.xml"
$sigFile = "qa_data/fatturapa/signed.p7m"

# Create the CAdES-BES signature, which contains the original data.
$success = $crypt.CreateP7M($inFile,$sigFile)
if ($success -eq $false) {
    $($crypt.LastErrorText)
    exit
}

# Now we'll encrypt what was signed using FatturaPA's certificate (from a PEM file)
$encryptCert = New-Object Chilkat.Cert
$success = $encryptCert.LoadFromFile("qa_data/certs/fatturapa_cert.pem")
if ($success -ne $true) {
    $($encryptCert.LastErrorText)
    exit
}

$crypt.CryptAlgorithm = "pki"

$success = $crypt.SetEncryptCert($encryptCert)
if ($success -ne $true) {
    $($crypt.LastErrorText)
    exit
}

# Indicate the underlying bulk encryption algorithm to be used:
$crypt.Pkcs7CryptAlg = "aes"
$crypt.KeyLength = 128

# There's one last option that could be set.  If is the RSA encryption encryption/padding scheme. 
# By default, RSAES_PKCS1-V1_5 is used.  If desired, the OaepPadding property could be set to $true to
# use RSAES_OAEP.  (We'll leave it set at the default value of $false)
$crypt.OaepPadding = $false

# Everything is specified.  Encrypt the .p7m to create a new .p7m (which adds a layer of encryption around the opaque signature).
# The output is PKCS7 in binary DER format.
$success = $crypt.CkEncryptFile($sigFile,"qa_output/signed_and_encrypted.p7m")
if ($success -ne $true) {
    $($crypt.LastErrorText)
    exit
}

$("Success.")