(.NET Core C#) UBL XAdES Enveloped Signature

Demonstrates how to create a UBL XAdES enveloped signature.

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

bool success = true;

// 
// The following code creates the XML document to be signed.
// (It is also possible to simply load the XML into the Chilkat XML object by calling the LoadXml method.)

// A sample (already signed) of this XML is available here:  External link: credit-note-en16931-xades-signed.xml

// Also, you may use this online tool to generate code from sample XML: 
// Generate Code to Create XML

Chilkat.Xml xmlToSign = new Chilkat.Xml();
xmlToSign.Tag = "CreditNote";
xmlToSign.AddAttribute("xmlns","urn:oasis:names:specification:ubl:schema:xsd:CreditNote-2");
xmlToSign.AddAttribute("xmlns:cac","urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2");
xmlToSign.AddAttribute("xmlns:cbc","urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2");
xmlToSign.AddAttribute("xmlns:ext","urn:oasis:names:specification:ubl:schema:xsd:CommonExtensionComponents-2");
xmlToSign.UpdateAttrAt("ext:UBLExtensions|ext:UBLExtension",true,"xmlns:sac","urn:oasis:names:specification:ubl:schema:xsd:SignatureAggregateComponents-2");
xmlToSign.UpdateAttrAt("ext:UBLExtensions|ext:UBLExtension",true,"xmlns:sig","urn:oasis:names:specification:ubl:schema:xsd:CommonSignatureComponents-2");
xmlToSign.UpdateChildContent("ext:UBLExtensions|ext:UBLExtension|ext:ExtensionContent|sig:UBLDocumentSignatures|sac:SignatureInformation","");
xmlToSign.UpdateChildContent("cbc:CustomizationID","urn:cen.eu:en16931:2017");
xmlToSign.UpdateChildContent("cbc:ProfileID","P1");
xmlToSign.UpdateChildContent("cbc:ID","c2ad1540-cf12-4e83-b47c-906aac70242e");
xmlToSign.UpdateChildContent("cbc:IssueDate","2009-12-15");
xmlToSign.UpdateAttrAt("cbc:Note",true,"languageID","en");
xmlToSign.UpdateChildContent("cbc:Note","Ordered in our booth at the convention.");
xmlToSign.UpdateAttrAt("cbc:DocumentCurrencyCode",true,"listAgencyID","6");
xmlToSign.UpdateAttrAt("cbc:DocumentCurrencyCode",true,"listID","ISO 4217 Alpha");
xmlToSign.UpdateChildContent("cbc:DocumentCurrencyCode","HRK");
xmlToSign.UpdateChildContent("cbc:AccountingCost","Project cost code 123");
xmlToSign.UpdateChildContent("cac:InvoicePeriod|cbc:StartDate","2009-11-01");
xmlToSign.UpdateChildContent("cac:InvoicePeriod|cbc:EndDate","2009-11-30");
xmlToSign.UpdateChildContent("cac:OrderReference|cbc:ID","123");
xmlToSign.UpdateChildContent("cac:ContractDocumentReference|cbc:ID","Contract321");
xmlToSign.UpdateChildContent("cac:ContractDocumentReference|cbc:DocumentType","Framework agreement");
xmlToSign.UpdateChildContent("cac:AdditionalDocumentReference|cbc:ID","Doc1");
xmlToSign.UpdateChildContent("cac:AdditionalDocumentReference|cbc:DocumentType","Timesheet");
xmlToSign.UpdateChildContent("cac:AdditionalDocumentReference|cac:Attachment|cac:ExternalReference|cbc:URI","http://www.suppliersite.eu/sheet001.html");
xmlToSign.UpdateChildContent("cac:AdditionalDocumentReference[1]|cbc:ID","Doc2");
xmlToSign.UpdateChildContent("cac:AdditionalDocumentReference[1]|cbc:DocumentType","Drawing");
xmlToSign.UpdateAttrAt("cac:AdditionalDocumentReference[1]|cac:Attachment|cbc:EmbeddedDocumentBinaryObject",true,"mimeCode","application/pdf");
xmlToSign.UpdateChildContent("cac:AdditionalDocumentReference[1]|cac:Attachment|cbc:EmbeddedDocumentBinaryObject","UjBsR09EbGhjZ0dTQUxNQUFBUUNBRU1tQ1p0dU1GUXhEUzhi");
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:PartyIdentification|cbc:ID","9934:18683136487::HR99:276");
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:PostalAddress|cbc:StreetName","KATANCICEVA");
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:PostalAddress|cbc:CityName","ZAGREB");
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:PostalAddress|cbc:PostalZone","10000");
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:PostalAddress|cac:Country|cbc:IdentificationCode","HR");
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:PartyTaxScheme|cbc:CompanyID","HR18683136487");
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:PartyTaxScheme|cac:TaxScheme|cbc:ID","FRE");
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:PartyLegalEntity|cbc:RegistrationName","MINISTARSTVO FINANCIJA");
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:Contact|cbc:Name","JURAJ MARKOVIC");
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:Contact|cbc:ElectronicMail","juraj.markovic@fina.hr");
xmlToSign.UpdateChildContent("cac:AccountingCustomerParty|cac:Party|cac:PartyIdentification|cbc:ID","9934:49811265576::HR99:NOVO1");
xmlToSign.UpdateChildContent("cac:AccountingCustomerParty|cac:Party|cac:PostalAddress|cbc:StreetName","GETALDICEVA 4");
xmlToSign.UpdateChildContent("cac:AccountingCustomerParty|cac:Party|cac:PostalAddress|cbc:CityName","ZAGREB");
xmlToSign.UpdateChildContent("cac:AccountingCustomerParty|cac:Party|cac:PostalAddress|cbc:PostalZone","10000");
xmlToSign.UpdateChildContent("cac:AccountingCustomerParty|cac:Party|cac:PostalAddress|cac:Country|cbc:IdentificationCode","HR");
xmlToSign.UpdateChildContent("cac:AccountingCustomerParty|cac:Party|cac:PartyTaxScheme|cbc:CompanyID","HR49811265576");
xmlToSign.UpdateChildContent("cac:AccountingCustomerParty|cac:Party|cac:PartyTaxScheme|cac:TaxScheme|cbc:ID","VAT");
xmlToSign.UpdateChildContent("cac:AccountingCustomerParty|cac:Party|cac:PartyLegalEntity|cbc:RegistrationName","NOVO1");
xmlToSign.UpdateChildContent("cac:Delivery|cac:DeliveryLocation|cac:Address|cac:Country|cbc:IdentificationCode","HR");
xmlToSign.UpdateChildContent("cac:PaymentMeans|cbc:PaymentMeansCode","30");
xmlToSign.UpdateChildContent("cac:PaymentMeans|cbc:InstructionNote","Neki opis placanja");
xmlToSign.UpdateChildContent("cac:PaymentMeans|cbc:PaymentID","HR00 12456");
xmlToSign.UpdateChildContent("cac:PaymentMeans|cac:PayeeFinancialAccount|cbc:ID","HR1210010051863000160");
xmlToSign.UpdateChildContent("cac:PaymentTerms|cbc:Note","Neki uvjeti placanja");
xmlToSign.UpdateAttrAt("cac:TaxTotal|cbc:TaxAmount",true,"currencyID","HRK");
xmlToSign.UpdateChildContent("cac:TaxTotal|cbc:TaxAmount","25.00");
xmlToSign.UpdateAttrAt("cac:TaxTotal|cac:TaxSubtotal|cbc:TaxableAmount",true,"currencyID","HRK");
xmlToSign.UpdateChildContent("cac:TaxTotal|cac:TaxSubtotal|cbc:TaxableAmount","100.00");
xmlToSign.UpdateAttrAt("cac:TaxTotal|cac:TaxSubtotal|cbc:TaxAmount",true,"currencyID","HRK");
xmlToSign.UpdateChildContent("cac:TaxTotal|cac:TaxSubtotal|cbc:TaxAmount","25.00");
xmlToSign.UpdateChildContent("cac:TaxTotal|cac:TaxSubtotal|cac:TaxCategory|cbc:ID","S");
xmlToSign.UpdateChildContent("cac:TaxTotal|cac:TaxSubtotal|cac:TaxCategory|cbc:Percent","25");
xmlToSign.UpdateChildContent("cac:TaxTotal|cac:TaxSubtotal|cac:TaxCategory|cac:TaxScheme|cbc:ID","VAT");
xmlToSign.UpdateAttrAt("cac:LegalMonetaryTotal|cbc:LineExtensionAmount",true,"currencyID","HRK");
xmlToSign.UpdateChildContent("cac:LegalMonetaryTotal|cbc:LineExtensionAmount","100.00");
xmlToSign.UpdateAttrAt("cac:LegalMonetaryTotal|cbc:TaxExclusiveAmount",true,"currencyID","HRK");
xmlToSign.UpdateChildContent("cac:LegalMonetaryTotal|cbc:TaxExclusiveAmount","100.00");
xmlToSign.UpdateAttrAt("cac:LegalMonetaryTotal|cbc:TaxInclusiveAmount",true,"currencyID","HRK");
xmlToSign.UpdateChildContent("cac:LegalMonetaryTotal|cbc:TaxInclusiveAmount","125.00");
xmlToSign.UpdateAttrAt("cac:LegalMonetaryTotal|cbc:PayableAmount",true,"currencyID","HRK");
xmlToSign.UpdateChildContent("cac:LegalMonetaryTotal|cbc:PayableAmount","125.00");
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cbc:ID","1");
xmlToSign.UpdateAttrAt("cac:CreditNoteLine|cbc:CreditedQuantity",true,"unitCode","H87");
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cbc:CreditedQuantity","1.000");
xmlToSign.UpdateAttrAt("cac:CreditNoteLine|cbc:LineExtensionAmount",true,"currencyID","HRK");
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cbc:LineExtensionAmount","100.00");
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cbc:Description","Neki detaljniji opis proizvoda ide ovdje");
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cbc:Name","Neki proizvod");
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cac:OriginCountry|cbc:IdentificationCode","HR");
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cac:ClassifiedTaxCategory|cbc:ID","S");
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cac:ClassifiedTaxCategory|cbc:Percent","25");
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cac:ClassifiedTaxCategory|cac:TaxScheme|cbc:ID","VAT");
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cac:AdditionalItemProperty|cbc:Name","Boja");
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cac:AdditionalItemProperty|cbc:Value","Plava");
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cac:AdditionalItemProperty[1]|cbc:Name","Masa");
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cac:AdditionalItemProperty[1]|cbc:Value","1,2 Kg");
xmlToSign.UpdateAttrAt("cac:CreditNoteLine|cac:Price|cbc:PriceAmount",true,"currencyID","HRK");
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Price|cbc:PriceAmount","100.000000");
xmlToSign.UpdateAttrAt("cac:CreditNoteLine|cac:Price|cbc:BaseQuantity",true,"unitCode","H87");
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Price|cbc:BaseQuantity","1.000");

// Use this online tool to generate XAdES code from a sample signed XML: 
// Generate Code to Creaet XAdES from Sample XAdES

// The following code was generated by the online tool.

Chilkat.XmlDSigGen gen = new Chilkat.XmlDSigGen();

gen.SigLocation = "CreditNote|ext:UBLExtensions|ext:UBLExtension|ext:ExtensionContent|sig:UBLDocumentSignatures|sac:SignatureInformation";
gen.SigLocationMod = 0;
gen.SigId = "Signature-7f4c4719515a4a0a8ce4d1b983a2ec69";
gen.SigNamespacePrefix = "";
gen.SigNamespaceUri = "http://www.w3.org/2000/09/xmldsig#";
gen.SignedInfoCanonAlg = "C14N";
gen.SignedInfoDigestMethod = "sha256";

// Create an Object to be added to the Signature.
Chilkat.Xml object1 = new Chilkat.Xml();
object1.Tag = "xades:QualifyingProperties";
object1.AddAttribute("xmlns:ds","http://www.w3.org/2000/09/xmldsig#");
object1.AddAttribute("xmlns:xades","http://uri.etsi.org/01903/v1.3.2#");
object1.AddAttribute("Target","#Signature-7f4c4719515a4a0a8ce4d1b983a2ec69");
object1.UpdateAttrAt("xades:SignedProperties",true,"Id","SignedProperties-6573207f4ad64b49b0310f7a9e2dfadc");
object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningTime","TO BE GENERATED BY CHILKAT");
// Note: It may be that http://www.w3.org/2001/04/xmlenc#sha256 is needed in the following line instead of http://www.w3.org/2000/09/xmldsig#sha1
object1.UpdateAttrAt("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestMethod",true,"Algorithm","http://www.w3.org/2000/09/xmldsig#sha1");
object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestValue","TO BE GENERATED BY CHILKAT");
object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:IssuerSerialV2","TO BE GENERATED BY CHILKAT");
object1.UpdateAttrAt("xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat",true,"ObjectReference","");
object1.UpdateChildContent("xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:Description","document");
object1.UpdateChildContent("xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:MimeType","application/xml");
object1.UpdateChildContent("xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:Encoding","UTF-8");

gen.AddObject("",object1.GetXml(),"","");

// -------- Reference 1 --------
gen.AddSameDocRef("","sha256","","","");

// -------- Reference 2 --------
gen.AddObjectRef("SignedProperties-6573207f4ad64b49b0310f7a9e2dfadc","sha256","","","http://uri.etsi.org/01903#SignedProperties");

// Provide a certificate + private key. (PFX password is test123)
Chilkat.Cert cert = new Chilkat.Cert();
success = cert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123");
if (success != true) {
    Debug.WriteLine(cert.LastErrorText);
    return;
}

gen.SetX509Cert(cert,true);

gen.KeyInfoType = "X509Data+KeyValue";
gen.X509Type = "IssuerSerial,SubjectName,SKI,Certificate";

// Load XML to be signed...
Chilkat.StringBuilder sbXml = new Chilkat.StringBuilder();
xmlToSign.GetXmlSb(sbXml);

// Adding the "UBLDocumentSignatures" behavior causes the following Transform to be used for the 
// first Reference:   
//   <Transform Algorithm="http://www.w3.org/TR/1999/REC-xpath-19991116"><XPath>count(ancestor-or-self::sig:UBLDocumentSignatures | here()/ancestor::sig:UBLDocumentSignatures[1]) &gt; count(ancestor-or-self::sig:UBLDocumentSignatures)</XPath></Transform>
gen.Behaviors = "IndentedSignature,UBLDocumentSignatures";

// Sign the XML...
success = gen.CreateXmlDSigSb(sbXml);
if (success != true) {
    Debug.WriteLine(gen.LastErrorText);
    return;
}

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

// Save the signed XML to a file.
success = sbXml.WriteFile("qa_output/signedXml.xml","utf-8",false);

Debug.WriteLine(sbXml.GetAsString());

// ----------------------------------------
// Verify the signature we just produced...
Chilkat.XmlDSig verifier = new Chilkat.XmlDSig();
success = verifier.LoadSignatureSb(sbXml);
if (success != true) {
    Debug.WriteLine(verifier.LastErrorText);
    return;
}

// We should have just one signature..
int numSigs = verifier.NumSignatures;
int verifyIdx = 0;
while (verifyIdx < numSigs) {
    verifier.Selector = verifyIdx;
    bool verified = verifier.VerifySignature(true);
    if (verified != true) {
        Debug.WriteLine(verifier.LastErrorText);
        return;
    }

    verifyIdx = verifyIdx + 1;
}

Debug.WriteLine("The signature was successfully verified.");