C#

Sign PDF for ICP-Brasil

See more PDF Signatures Examples

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) C#

bool success = 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/
Chilkat.Pdf pdf = 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) {
    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.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.
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 = pdf.SignPdf(json,"qa_output/hello_signed.pdf");
if (success == false) {
    Debug.WriteLine(pdf.LastErrorText);
    return;
}

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