(Xojo Plugin) Italian FatturaPA (e-Invoice) Signed XML (CADES-BES P7M) using USB SmartCard Reader

Demonstrates Italian e-Invoice (FatturaPA) signing by using a private key stored on a USB smartcard reader.

Chilkat Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

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

Dim crypt As New Chilkat.Crypt2
crypt.VerboseLogging = True

Dim cert As New Chilkat.Cert
// Use your smart card user PIN for signing.
cert.SmartCardPin = "0000"

Dim success As Boolean
success = cert.LoadFromSmartcard("")
If (success = False) Then
    System.DebugLog(cert.LastErrorText)
    Return
End If

success = crypt.SetSigningCert(cert)
If (success = False) Then
    System.DebugLog(crypt.LastErrorText)
    Return
End If

// The CadesEnabled property applies to all methods that create PKCS7 signatures. 
// To create a CAdES-BES signature, set this property equal to true.
crypt.CadesEnabled = True

crypt.HashAlgorithm = "sha256"

Dim signedAttrs As New Chilkat.JsonObject
success = signedAttrs.UpdateInt("contentType",1)
success = signedAttrs.UpdateInt("signingTime",1)
success = signedAttrs.UpdateInt("messageDigest",1)
success = signedAttrs.UpdateInt("signingCertificateV2",1)
crypt.SigningAttributes = signedAttrs.Emit()

// Load XML such as the following:
//  <p:FatturaElettronica xmlns:p="http://ivaservizi.agenziaentrate.gov.it/docs/xsd/fatture/v1.2" versione="FPR12">
//     <FatturaElettronicaHeader>
//        <DatiTrasmissione>
// 	...
//        </DatiTrasmissione>
//        <CedentePrestatore>
// 	...
//        </CedentePrestatore>
//        <CessionarioCommittente>
// 	...
//        </CessionarioCommittente>
//     </FatturaElettronicaHeader>
//     <FatturaElettronicaBody>
//        <DatiGenerali>
//           <DatiGeneraliDocumento>
// 		...
//           </DatiGeneraliDocumento>
//        </DatiGenerali>
//        <DatiBeniServizi>
// 	...
//        </DatiBeniServizi>
//     </FatturaElettronicaBody>
//  </p:FatturaElettronica>

Dim inputXmlPath As String
inputXmlPath = "c:/someDir/e-Invoice.xml"
Dim outputP7mPath As String
outputP7mPath = "c:/someDir/signed.p7m"

// Create the CAdES-BES attached signature, which contains the original data.
success = crypt.CreateP7M(inputXmlPath,outputP7mPath)
If (success = False) Then
    System.DebugLog(crypt.LastErrorText)
    Return
End If

System.DebugLog("Success.")