(C# UWP/WinRT) 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/

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.

// The signed PDF produced by this example should be verifiable at https://verificador.iti.gov.br/verifier-2.6.2/
Chilkat.Pdf pdf = new Chilkat.Pdf();

// Load a PDF to be signed.
// The "hello.pdf" is available at https://chilkatsoft.com/hello.pdf
bool success = pdf.LoadFile("qa_data/pdf/hello.pdf");
if (success == false) {
    Debug.WriteLine(pdf.LastErrorText);
    return;
}

Chilkat.JsonObject json = 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.UpdateString("policyId.id","2.16.76.1.7.1.1.2.3");
json.UpdateString("policyId.hash","sW6Iu/dzIqZ5lbeQeHeO09DqfIhYe29tUYtxXo92o9U=");
json.UpdateString("policyId.uri","http://politicas.icpbrasil.gov.br/PA_AD_RB_v2_3.der");
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.
Chilkat.Cert cert = new Chilkat.Cert();
success = cert.LoadPfxFile("qa_data/pfx/myPdfSigningCert.pfx","pfx_password");
if (success == false) {
    Debug.WriteLine(cert.LastErrorText);
    return;
}

// Tell the pdf object to use the certificate for signing.
success = pdf.SetSigningCert(cert);
if (success == false) {
    Debug.WriteLine(pdf.LastErrorText);
    return;
}

success = await pdf.SignPdfAsync(json,"qa_output/hello_signed.pdf");
if (success == false) {
    Debug.WriteLine(pdf.LastErrorText);
    return;
}

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