VB.NET
Sign PDF for ICP-Brasil

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)
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VB.NET
Dim success As Boolean = False

' 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://validar.iti.gov.br/
Dim pdf As New Chilkat.Pdf

' 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.WriteLine(pdf.LastErrorText)
    Exit Sub
End If


Dim json As New Chilkat.JsonObject

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

' Add the CMS options required for ICP-Brasil
json.UpdateInt("contentType",1)
json.UpdateInt("messageDigest",1)
json.UpdateInt("signingCertificateV2",1)
json.UpdateBool("ltvOcsp",True)

' Listed here are the currently existing profiles. (Chilkat will add additional ICP Brasil policy profiles in future versions as new ones are created.)
' See https://www.gov.br/iti/pt-br/assuntos/repositorio/artefatos-de-assinatura-digital for more information.
' 
' PA_AD_RA_v1_1 --> 2.16.76.1.7.1.5.1.1
' PA_AD_RA_v1_2 --> 2.16.76.1.7.1.5.1.2
' PA_AD_RA_v2_0 --> 2.16.76.1.7.1.5.2
' PA_AD_RA_v2_1 --> 2.16.76.1.7.1.5.2.1
' PA_AD_RA_v2_2 --> 2.16.76.1.7.1.5.2.2
' PA_AD_RA_v2_3 --> 2.16.76.1.7.1.5.2.3
' PA_AD_RA_v2_4 --> 2.16.76.1.7.1.5.2.4

' PA_AD_RB_v1_1 --> 2.16.76.1.7.1.1.1.1
' PA_AD_RB_v2_0 --> 2.16.76.1.7.1.1.2
' PA_AD_RB_v2_1 --> 2.16.76.1.7.1.1.2.1
' PA_AD_RB_v2_2 --> 2.16.76.1.7.1.1.2.2
' PA_AD_RB_v2_3 --> 2.16.76.1.7.1.1.2.3

' PA_AD_RC_v1_1 --> 2.16.76.1.7.1.4.1.1
' PA_AD_RC_v2_0 --> 2.16.76.1.7.1.4.2
' PA_AD_RC_v2_1 --> 2.16.76.1.7.1.4.2.1
' PA_AD_RC_v2_2 --> 2.16.76.1.7.1.4.2.2
' PA_AD_RC_v2_3 --> 2.16.76.1.7.1.4.2.3

' PA_AD_RT_v1_1 --> 2.16.76.1.7.1.2.1.1
' PA_AD_RT_v2_0 --> 2.16.76.1.7.1.2.2
' PA_AD_RT_v2_1 --> 2.16.76.1.7.1.2.2.1
' PA_AD_RT_v2_2 --> 2.16.76.1.7.1.2.2.2
' PA_AD_RT_v2_3 --> 2.16.76.1.7.1.2.2.3

' PA_AD_RV_v1_1 --> 2.16.76.1.7.1.3.1.1
' PA_AD_RV_v2_0 --> 2.16.76.1.7.1.3.2
' PA_AD_RV_v2_1 --> 2.16.76.1.7.1.3.2.1
' PA_AD_RV_v2_2 --> 2.16.76.1.7.1.3.2.2
' PA_AD_RV_v2_3 --> 2.16.76.1.7.1.3.2.3

' PA_PAdES_AD_RA_v1_0 --> 2.16.76.1.7.1.14.1
' PA_PAdES_AD_RA_v1_1 --> 2.16.76.1.7.1.14.1.1
' PA_PAdES_AD_RA_v1_2 --> 2.16.76.1.7.1.14.1.2
' PA_PAdES_AD_RB_v1_0 --> 2.16.76.1.7.1.11.1
' PA_PAdES_AD_RB_v1_1 --> 2.16.76.1.7.1.11.1.1
' PA_PAdES_AD_RC_v1_0 --> 2.16.76.1.7.1.13.1
' PA_PAdES_AD_RC_v1_1 --> 2.16.76.1.7.1.13.1.1
' PA_PAdES_AD_RC_v1_2 --> 2.16.76.1.7.1.13.1.2
' PA_PAdES_AD_RT_v1_0 --> 2.16.76.1.7.1.12.1
' PA_PAdES_AD_RT_v1_1 --> 2.16.76.1.7.1.12.1.1

' Set the policy profile name
' ---------------------------------------------------
' Note: On 24-May-2024, I was informed that adding the "policyId.profile"
' causes the PDF signature to fail validation at https://validar.iti.gov.br/
' Perhaps something changed in the years since this example was originally written and tested to be working.
' You may need to omit the "policyId.profile".
' ---------------------------------------------------
json.UpdateString("policyId.profile","PA_PAdES_AD_RB_v1_1")

' 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 New Chilkat.Cert
success = cert.LoadPfxFile("qa_data/pfx/myPdfSigningCert.pfx","pfx_password")
If (success = False) Then
    Debug.WriteLine(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.WriteLine(pdf.LastErrorText)
    Exit Sub
End If


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


Debug.WriteLine("The PDF has been successfully cryptographically signed.")