(VB.NET) Create XAdES using Smart Card or USB Token

Demonstrates how to create an XAdES signed XML document using a certificate located on a smartcard or USB token.

Note: This example requires Chilkat v9.5.0.75 or greater. Also, at the time of this writing this example is restricted to the Windows operating system.

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

' ----------------------------------------------------------------------
' IMPORTANT: This generated example requires Chilkat v9.5.0.75 or later.
' Contact support@chilkatsoft.com for a pre-release.
' ----------------------------------------------------------------------

' Load the XML to be signed.
Dim xmlToSign As New Chilkat.Xml
Dim success As Boolean = xmlToSign.LoadXmlFile("qa_data/fattura_electronica/docToSign.xml")
If (success <> True) Then
    Debug.WriteLine(xmlToSign.LastErrorText)
    Exit Sub
End If


Dim gen As New Chilkat.XmlDSigGen

gen.SigLocation = "p:FatturaElettronica"
gen.SigId = "xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504"
gen.SigNamespacePrefix = "ds"
gen.SigNamespaceUri = "http://www.w3.org/2000/09/xmldsig#"
gen.SigValueId = "xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504-sigvalue"
gen.SignedInfoCanonAlg = "C14N"
gen.SignedInfoDigestMethod = "sha256"

' Create an Object to be added to the Signature.
' Note: Chilkat will automatically populate the strings indicated by "TO BE GENERATED BY CHILKAT" with actual/correct values
' when the XML is signed.
Dim object1 As New Chilkat.Xml
object1.Tag = "xades:QualifyingProperties"
object1.AddAttribute("xmlns:xades","http://uri.etsi.org/01903/v1.3.2#")
object1.AddAttribute("xmlns:xades141","http://uri.etsi.org/01903/v1.4.1#")
object1.AddAttribute("Target","#xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504")
object1.UpdateAttrAt("xades:SignedProperties",True,"Id","xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504-signedprops")
object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningTime","TO BE GENERATED BY CHILKAT")
object1.UpdateAttrAt("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestMethod",True,"Algorithm","http://www.w3.org/2001/04/xmlenc#sha256")
object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestValue","TO BE GENERATED BY CHILKAT")
object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:IssuerSerialV2","TO BE GENERATED BY CHILKAT")

gen.AddObject("",object1.GetXml(),"","")


' -------- Reference 1 --------
gen.KeyInfoId = "xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504-keyinfo"
gen.AddSameDocRef("xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504-keyinfo","sha256","","","")

' -------- Reference 2 --------
gen.AddSameDocRef("","sha256","","","")
gen.SetRefIdAttr("","xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504-ref0")

' -------- Reference 3 --------
gen.AddObjectRef("xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504-signedprops","sha256","","","http://uri.etsi.org/01903#SignedProperties")

' ----------------------------------------------------------------
'  Load a certificate that has been pre-installed on the Windows system
'  This includes certificates on smartcards and USB tokens
Dim cert As New Chilkat.Cert

'  You may provide the PIN here..
cert.SmartCardPin = "000000"

' Load the certificate on the smartcard currently in the reader (or on the USB token).
' Pass an empty string to allow Chilkat to automatically choose the CSP (Cryptographi Service Provider).
' See Load Certificate on Smartcard for information about explicitly selecting a particular CSP.
success = cert.LoadFromSmartcard("")
If (success <> True) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


gen.SetX509Cert(cert,True)
gen.KeyInfoType = "X509Data"
gen.X509Type = "Certificate"

' Load XML to be signed...
Dim sbXml As New Chilkat.StringBuilder
xmlToSign.GetXmlSb(sbXml)

gen.Behaviors = "IndentedSignature,ForceAddEnvelopedSignatureTransform"

' Sign the XML...
success = gen.CreateXmlDSigSb(sbXml)
If (success <> True) Then
    Debug.WriteLine(gen.LastErrorText)
    Exit Sub
End If


' Save the signed XMl to a file.
success = sbXml.WriteFile("qa_output/signedXml.xml","utf-8",False)

Debug.WriteLine(sbXml.GetAsString())

' ----------------------------------------
' Verify the signature we just produced...
Dim verifier As New Chilkat.XmlDSig
success = verifier.LoadSignatureSb(sbXml)
If (success <> True) Then
    Debug.WriteLine(verifier.LastErrorText)
    Exit Sub
End If


Dim verified As Boolean = verifier.VerifySignature(True)
If (verified <> True) Then
    Debug.WriteLine(verifier.LastErrorText)
    Exit Sub
End If

Debug.WriteLine("This signature was successfully verified.")