(C# UWP/WinRT) Create CAdES Signature (.p7s) Compliant with ICP-Brazil Digital Signature Standard

Demonstrates how to create a CMS signature w/ policy ID that is compliant with the ICP-Brazil Digital Signature Standard.

Note: This example requires Chilkat v9.5.0.79 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.

// ------------------------------------------------------------------------------------------------------
// 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
// ------------------------------------------------------------------------------------------------------

Chilkat.Crypt2 crypt = new Chilkat.Crypt2();

Chilkat.Cert cert = new Chilkat.Cert();
bool success = cert.LoadPfxFile("mySigningCert.pfx","pfxPassword");
if (success != true) {
    Debug.WriteLine(cert.LastErrorText);
    return;
}

crypt.SetSigningCert(cert);
crypt.HashAlgorithm = "sha256";

// Create JSON to indicate which signing attributes to include.
Chilkat.JsonObject attrs = new Chilkat.JsonObject();
attrs.UpdateBool("contentType",true);
attrs.UpdateBool("signingTime",true);
attrs.UpdateBool("messageDigest",true);
attrs.UpdateString("contentHint.text","Content-Type: application/octet-stream\r\nContent-Disposition: attachment;filename=\"documento.pdf\"");
attrs.UpdateString("contentHint.oid","1.2.840.113549.1.7.1");
attrs.UpdateString("policyId.id","2.16.76.1.7.1.1.2.3");
attrs.UpdateString("policyId.hash","sW6Iu/dzIqZ5lbeQeHeO09DqfIhYe29tUYtxXo92o9U=");
attrs.UpdateString("policyId.hashAlg","SHA256");
attrs.UpdateString("policyId.uri","http://politicas.icpbrasil.gov.br/PA_AD_RB_v2_3.der");
attrs.UpdateBool("signingCertificateV2",true);

crypt.SigningAttributes = attrs.Emit();

// The input file can be any type of file.
string inFile = "toBeSigned.pdf";
string outFile = "signed.pdf.p7s";

success = await crypt.CreateP7MAsync(inFile,outFile);
if (success == false) {
    Debug.WriteLine(crypt.LastErrorText);
    return;
}

Debug.WriteLine("Success.");