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(Mono C#) Paraguay E-Invoicing Signed XML (SIFEN)

See more XML Digital Signatures Examples

Demonstrates how to sign XML for e-invoicing -- SISTEMA INTEGRADO DE FACTURACIÓN ELECTRÓNICA NACIONAL (SIFEN). This is for signing XML files that need to be submitted to a government agency (Country Paraguay, SIFEN / EKUATIA, Sistema Nacional de Facturacion Electrónica).

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bool success = true;

// Create the XML to be signed...

// Use this online tool to generate code from sample XML: 
// Generate Code to Create XML

Chilkat.Xml xmlToSign = new Chilkat.Xml();
xmlToSign.Tag = "rDE";
xmlToSign.AddAttribute("xmlns","http://ekuatia.set.gov.py/sifen/xsd");
xmlToSign.AddAttribute("xmlns:xsi","http://www.w3.org/2001/XMLSchema-instance");
xmlToSign.AddAttribute("xsi:schemaLocation","http://ekuatia.set.gov.py/sifen/xsd siRecepDE_v150.xsd");
xmlToSign.UpdateChildContent("dVerFor","150");
xmlToSign.UpdateAttrAt("DE",true,"Id","01800228774059001001501012022091519999999990");
xmlToSign.UpdateChildContent("DE|dDVId","0");
xmlToSign.UpdateChildContent("DE|dFecFirma","2022-09-15T10:23:05");
xmlToSign.UpdateChildContent("DE|dSisFact","1");
xmlToSign.UpdateChildContent("DE|gOpeDE|iTipEmi","1");
xmlToSign.UpdateChildContent("DE|gOpeDE|dDesTipEmi","Normal");
xmlToSign.UpdateChildContent("DE|gOpeDE|dCodSeg","999999999");
xmlToSign.UpdateChildContent("DE|gOpeDE|dInfoEmi","GENERADA DE PEDIDO 131043202");
xmlToSign.UpdateChildContent("DE|gTimb|iTiDE","1");
xmlToSign.UpdateChildContent("DE|gTimb|dDesTiDE","Factura electrnica");
xmlToSign.UpdateChildContent("DE|gTimb|dNumTim","18889014");
xmlToSign.UpdateChildContent("DE|gTimb|dEst","059");
xmlToSign.UpdateChildContent("DE|gTimb|dPunExp","001");
xmlToSign.UpdateChildContent("DE|gTimb|dNumDoc","0015010");
xmlToSign.UpdateChildContent("DE|gTimb|dFeIniT","2022-05-25");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|dFeEmiDE","2022-09-15T10:22:57");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gOpeCom|iTipTra","1");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gOpeCom|dDesTipTra","Venta de mercadera");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gOpeCom|iTImp","1");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gOpeCom|dDesTImp","IVA");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gOpeCom|cMoneOpe","PYG");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gOpeCom|dDesMoneOpe","Guarani");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|dRucEm","80022877");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|dDVEmi","4");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|iTipCont","1");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|cTipReg","1");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|dNomEmi","ABCDEF SA");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|dNomFanEmi","ABCDEF SA");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|dDirEmi","Jos Abcde Xyz N 666 e/Abxyz123");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|dNumCas","0");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|dCompDir1","N/A");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|dCompDir2","N/A");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|cDepEmi","12");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|dDesDepEmi","CENTRAL");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|cDisEmi","153");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|dDesDisEmi","CAPIATA");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|cCiuEmi","1234");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|dDesCiuEmi","CAPIATA");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|dTelEmi","(022) 1111 000");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|dEmailE","somebody@example.com.py");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|dDenSuc","PUNTO 99");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|gActEco|cActEco","47721");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gEmis|gActEco|dDesActEco","COMERCIO AL POR MENOR DE PRODUCTOS");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gDatRec|iNatRec","1");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gDatRec|iTiOpe","2");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gDatRec|cPaisRec","PRY");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gDatRec|dDesPaisRe","Paraguay");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gDatRec|iTiContRec","2");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gDatRec|dRucRec","80082971");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gDatRec|dDVRec","9");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gDatRec|dNomRec","XXXXXXX");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gDatRec|dNomFanRec","XXXXXXX");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gDatRec|dNumCasRec","0");
xmlToSign.UpdateChildContent("DE|gDatGralOpe|gDatRec|dCodCliente","9999999");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamFE|iIndPres","1");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamFE|dDesIndPres","Operacin presencial");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamCond|iCondOpe","1");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamCond|dDCondOpe","Contado");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamCond|gPaConEIni|iTiPago","1");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamCond|gPaConEIni|dDesTiPag","Efectivo");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamCond|gPaConEIni|dMonTiPag","100000.0000");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamCond|gPaConEIni|cMoneTiPag","PYG");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamCond|gPaConEIni|dDMoneTiPag","Guarani");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamCond|gPaConEIni[1]|iTiPago","1");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamCond|gPaConEIni[1]|dDesTiPag","Efectivo");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamCond|gPaConEIni[1]|dMonTiPag","73600.0000");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamCond|gPaConEIni[1]|cMoneTiPag","PYG");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamCond|gPaConEIni[1]|dDMoneTiPag","Guarani");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamItem|dCodInt","818181");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamItem|dDesProSer","Widget Abc Xyz");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamItem|cUniMed","77");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamItem|dDesUniMed","UNI");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamItem|dCantProSer","2.0000");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamItem|gValorItem|dPUniProSer","16500.0000");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamItem|gValorItem|dTotBruOpeItem","33000.0000");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamItem|gValorItem|gValorRestaItem|dDescItem","3300.0000");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamItem|gValorItem|gValorRestaItem|dPorcDesIt","20.0000");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamItem|gValorItem|gValorRestaItem|dTotOpeItem","26400.0000");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamItem|gCamIVA|iAfecIVA","1");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamItem|gCamIVA|dDesAfecIVA","Gravado IVA");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamItem|gCamIVA|dPropIVA","100");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamItem|gCamIVA|dTasaIVA","5");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamItem|gCamIVA|dBasGravIVA","25142.8571");
xmlToSign.UpdateChildContent("DE|gDtipDE|gCamItem|gCamIVA|dLiqIVAItem","1257.1429");
xmlToSign.UpdateChildContent("DE|gTotSub|dSubExe","0.0000");
xmlToSign.UpdateChildContent("DE|gTotSub|dSub5","26400.0000");
xmlToSign.UpdateChildContent("DE|gTotSub|dSub10","0.0000");
xmlToSign.UpdateChildContent("DE|gTotSub|dTotOpe","26400.0000");
xmlToSign.UpdateChildContent("DE|gTotSub|dTotDesc","6600.0000");
xmlToSign.UpdateChildContent("DE|gTotSub|dTotDescGlotem","0.0000");
xmlToSign.UpdateChildContent("DE|gTotSub|dTotAntItem","0.0000");
xmlToSign.UpdateChildContent("DE|gTotSub|dTotAnt","0.0000");
xmlToSign.UpdateChildContent("DE|gTotSub|dPorcDescTotal","0.0000");
xmlToSign.UpdateChildContent("DE|gTotSub|dDescTotal","6600.0000");
xmlToSign.UpdateChildContent("DE|gTotSub|dAnticipo","0.0000");
xmlToSign.UpdateChildContent("DE|gTotSub|dRedon","0.0000");
xmlToSign.UpdateChildContent("DE|gTotSub|dTotGralOpe","26400.0000");
xmlToSign.UpdateChildContent("DE|gTotSub|dIVA5","1257.1429");
xmlToSign.UpdateChildContent("DE|gTotSub|dIVA10","0.0000");
xmlToSign.UpdateChildContent("DE|gTotSub|dTotIVA","1257.1429");
xmlToSign.UpdateChildContent("DE|gTotSub|dBaseGrav5","25142.8571");
xmlToSign.UpdateChildContent("DE|gTotSub|dBaseGrav10","0.0000");
xmlToSign.UpdateChildContent("DE|gTotSub|dTBasGraIVA","25142.8571");

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

gen.SigLocation = "rDE";
gen.SigLocationMod = 0;
gen.SigNamespacePrefix = "";
gen.SigNamespaceUri = "http://www.w3.org/2000/09/xmldsig#";
gen.SignedInfoCanonAlg = "C14N";
gen.SignedInfoDigestMethod = "sha256";

// -------- Reference 1 --------
Chilkat.Xml xml1 = new Chilkat.Xml();
xml1.Tag = "Transforms";
xml1.UpdateAttrAt("Transform",true,"Algorithm","http://www.w3.org/2000/09/xmldsig#enveloped-signature");
xml1.UpdateAttrAt("Transform[1]",true,"Algorithm","http://www.w3.org/2001/10/xml-exc-c14n#");

gen.AddSameDocRef2("01800228774059001001501012022091516941989060","sha256",xml1,"");

// 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";
gen.X509Type = "Certificate";

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

gen.Behaviors = "IndentedSignature";

// 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("c:/temp/qa_output/signedXml.xml","utf-8",false);

Debug.WriteLine(sbXml.GetAsString());

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

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("All signatures were successfully verified.");
 

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