(Excel) Sign PDF for ICP-Brasil

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Sign a PDF to create a signed PDF compliant with the ICP-Brasil Digital Signature Standard Conformity Checker. (Verificador de Conformidade do Padrão de Assinatura Digital ICP-Brasil)

Note: This example requires Chilkat v9.5.0.87 or greater.

For more information, see https://verificador.iti.gov.br/verifier-2.6.2/

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

' The signed PDF produced by this example should be verifiable at https://verificador.iti.gov.br/verifier-2.6.2/
Dim pdf As Chilkat.Pdf
Set pdf = Chilkat.NewPdf

' Load a PDF to be signed.
' The "hello.pdf" is available at https://chilkatsoft.com/hello.pdf

success = pdf.LoadFile("qa_data/pdf/hello.pdf")
If (success = False) Then
    Debug.Print pdf.LastErrorText
    Exit Sub
End If

Dim json As Chilkat.JsonObject
Set json = Chilkat.NewJsonObject

' Define the appearance and location of the signature.
Dim success As Boolean
success = json.UpdateInt("page",1)
success = json.UpdateString("appearance.y","bottom")
success = json.UpdateString("appearance.x","middle")
success = json.UpdateString("appearance.fontScale","9.0")
success = json.UpdateString("appearance.text[0]","Digitally signed by: cert_cn")
success = json.UpdateString("appearance.text[1]","current_dt")
success = json.UpdateString("appearance.image","document-accepted")
success = json.UpdateString("appearance.imagePlacement","left")
success = json.UpdateString("appearance.imageOpacity","100")

' Add the CMS options required for ICP-Brasil
success = json.UpdateInt("contentType",1)
success = json.UpdateInt("messageDigest",1)
success = json.UpdateInt("signingCertificateV2",1)
success = json.UpdateString("policyId.id","2.16.76.1.7.1.1.2.3")
success = json.UpdateString("policyId.hash","sW6Iu/dzIqZ5lbeQeHeO09DqfIhYe29tUYtxXo92o9U=")
success = json.UpdateString("policyId.uri","http://politicas.icpbrasil.gov.br/PA_AD_RB_v2_3.der")
success = json.UpdateString("policyId.hashAlg","SHA256")

' Load the signing certificate. (Use your own certificate.)
' Note: If loading from a smart card, call LoadFromSmartcard instead, and make sure to use Chilkat v9.5.0.88 or later.
Dim cert As Chilkat.Cert
Set cert = Chilkat.NewCert
success = cert.LoadPfxFile("qa_data/pfx/myPdfSigningCert.pfx","pfx_password")
If (success = False) Then
    Debug.Print cert.LastErrorText
    Exit Sub
End If

' Tell the pdf object to use the certificate for signing.
success = pdf.SetSigningCert(cert)
If (success = False) Then
    Debug.Print pdf.LastErrorText
    Exit Sub
End If

success = pdf.SignPdf(json,"qa_output/hello_signed.pdf")
If (success = False) Then
    Debug.Print pdf.LastErrorText
    Exit Sub
End If

Debug.Print "The PDF has been successfully cryptographically signed."