(.NET Core C#) Create CAdES-BES .p7m for FatturaPA XML Invoice

Demonstrates how to create a CAdES BES invoice.xml.p7m for the Italian FatturaPA exchange system.

Note: This example requires Chilkat v9.5.0.75.

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//  Note: Requires Chilkat v9.5.0.75 or greater.

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

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

//  Use a digital certificate and private key from a PFX file (.pfx or .p12).
string pfxPath = "qa_data/pfx/cert_test123.pfx";
string pfxPassword = "test123";

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

//  Provide the signing cert (with associated private key).
success = crypt.SetSigningCert(cert);
if (success != true) {
    Debug.WriteLine(crypt.LastErrorText);
    return;
}

//  Indicate that SHA-256 should be used.
crypt.HashAlgorithm = "sha256";

//  Specify the signed attributes to be included.
//  (This is what makes it CAdES-BES compliant.)
Chilkat.JsonObject jsonSignedAttrs = new Chilkat.JsonObject();
jsonSignedAttrs.UpdateInt("contentType",1);
jsonSignedAttrs.UpdateInt("signingTime",1);
jsonSignedAttrs.UpdateInt("messageDigest",1);
jsonSignedAttrs.UpdateInt("signingCertificateV2",1);
crypt.SigningAttributes = jsonSignedAttrs.Emit();

string inFile = "qa_data/xml/IT01234567890_11002.xml";
string sigFile = "qa_output/IT01234567890_11002.xml.p7m";

//  Create the CAdES-BES signature, which contains the original data.
success = crypt.CreateP7M(inFile,sigFile);
if (success == false) {
    Debug.WriteLine(crypt.LastErrorText);
    return;
}

Debug.WriteLine("Success.");