(Visual Basic 6.0) Create CAdES-BES .p7m for FatturaPA XML Invoice

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

Note: This example requires Chilkat v9.5.0.75.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

'  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.

Dim crypt As New ChilkatCrypt2

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

Dim cert As New ChilkatCert
Dim success As Long
success = cert.LoadPfxFile(pfxPath,pfxPassword)
If (success <> 1) Then
    Debug.Print cert.LastErrorText
    Exit Sub
End If

'  Provide the signing cert (with associated private key).
success = crypt.SetSigningCert(cert)
If (success <> 1) Then
    Debug.Print 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 ChilkatJsonObject
success = jsonSignedAttrs.UpdateInt("contentType",1)
success = jsonSignedAttrs.UpdateInt("signingTime",1)
success = jsonSignedAttrs.UpdateInt("messageDigest",1)
success = jsonSignedAttrs.UpdateInt("signingCertificateV2",1)
crypt.SigningAttributes = jsonSignedAttrs.Emit()

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

'  Create the CAdES-BES signature, which contains the original data.
success = crypt.CreateP7M(inFile,sigFile)
If (success = 0) Then
    Debug.Print crypt.LastErrorText
    Exit Sub
End If

Debug.Print "Success."