(VB.NET) Create CAdES-BES .p7m using Smart Card or USB Token

Demonstrates how to create a CAdES BES invoice.xml.p7m using a certificate stored on a smart card or USB token.

Note: This example requires Chilkat v9.5.0.77 and at the time of this writing is restricted to the Windows operating system.

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' Note: Requires Chilkat v9.5.0.77 or greater.

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

Dim crypt As New Chilkat.Crypt2

' Use a certificate on a smartcard or USB token.
Dim cert As New Chilkat.Cert
' 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.
Dim success As Boolean = cert.LoadFromSmartcard("")
If (success <> True) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


' Provide the smartcard PIN.
' If the PIN is not explicitly provided here, the Windows OS should
' display a dialog for the PIN.
cert.SmartCardPin = "000000"

' Provide the certificate for signing.
success = crypt.SetSigningCert(cert)
If (success <> True) Then
    Debug.WriteLine(crypt.LastErrorText)
    Exit Sub
End If


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

Dim inFile As String = "qa_data/xml/IT01234567890_11002.xml"
Dim sigFile As String = "qa_output/IT01234567890_11002.xml.p7m"

' Create the CAdES-BES signature, which contains the original data.
success = crypt.CreateP7M(inFile,sigFile)
If (success = False) Then
    Debug.WriteLine(crypt.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Success.")