(VB.NET UWP/WinRT) Create ICP-Brasil Compliant CMS Signature

Demonstrates how to create a .p7s signature that contains a data file, which in this case is a PDF. The .p7s will be compliant with the ICP-Brazil Digital Signature Standard.

The .p7s file created by this example can be verified at ICP-Brasil Online Verifier

Important: This example requires Chilkat v9.5.0.83 or later.

For more information, see http://www.iti.gov.br/images/repositorio/consulta-publica/encerradas/DOC-ICP-15_-_Versao_2.2_VISAO_GERAL_SOBRE_ASSIN_DIG_NA_ICP-BRASIL_xx-xx-2015.pdf

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

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

' ------------------------------------------------------------------------------------------------------
' Note: This example creates a CMS signature (.p7s) that contains the PDF.
' It is different than signing a PDF.  To sign a PDF where the resulting PDF contains the CMS signature,
' see this example:  Sign PDF for ICP-Brasil
' ------------------------------------------------------------------------------------------------------
Dim crypt As New Chilkat.Crypt2

' Any type of file can be signed.  It doesn't have to be a PDF.
Dim inFile As String = "qa_data/pdf/helloWorld.pdf"

Dim bd As New Chilkat.BinData
Dim success As Boolean = bd.LoadFile(inFile)
If (success = False) Then
    Debug.WriteLine("Failed to load " & inFile)
    Exit Sub
End If


' We'll be using a certificate w/ private key stored on a smartcard for signing.
Dim cert As New Chilkat.Cert

' If the smartcard or token requires a PIN, we can set it here to avoid the dialog...
cert.SmartCardPin = "000000"

success = cert.LoadFromSmartcard("")
If (success <> True) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


' Tell the crypt component to use this cert.
success = crypt.SetSigningCert(cert)
If (success <> True) Then
    Debug.WriteLine(crypt.LastErrorText)
    Exit Sub
End If


' Set properties for signing...
crypt.HashAlgorithm = "sha1"

Dim jsonSigningAttrs As New Chilkat.JsonObject
jsonSigningAttrs.UpdateInt("contentType",1)
jsonSigningAttrs.UpdateInt("signingTime",1)
jsonSigningAttrs.UpdateInt("messageDigest",1)

crypt.SigningAttributes = jsonSigningAttrs.Emit()

' The Brazil government validator requires the ASN.1 data to be in "constructed octets" form..
crypt.UncommonOptions = "UseConstructedOctets,OmitAlgorithmIdNull"
crypt.IncludeCertChain = False

' Sign. 
success = Await crypt.OpaqueSignBdAsync(bd)
If (success = False) Then
    Debug.WriteLine(crypt.LastErrorText)
    Exit Sub
End If


' Save to a .p7s
success = bd.WriteFile("qa_output/helloWorld.pdf.p7s")

Debug.WriteLine("Success")