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(Unicode 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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#include <C_CkXmlW.h>
#include <C_CkXmlDSigGenW.h>
#include <C_CkCertW.h>
#include <C_CkStringBuilderW.h>
#include <C_CkXmlDSigW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkXmlW xmlToSign;
    HCkXmlDSigGenW gen;
    HCkXmlW xml1;
    HCkCertW cert;
    HCkStringBuilderW sbXml;
    HCkXmlDSigW verifier;
    int numSigs;
    int verifyIdx;
    BOOL verified;

    success = TRUE;

    // Create the XML to be signed...

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

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

    gen = CkXmlDSigGenW_Create();

    CkXmlDSigGenW_putSigLocation(gen,L"rDE");
    CkXmlDSigGenW_putSigLocationMod(gen,0);
    CkXmlDSigGenW_putSigNamespacePrefix(gen,L"");
    CkXmlDSigGenW_putSigNamespaceUri(gen,L"http://www.w3.org/2000/09/xmldsig#");
    CkXmlDSigGenW_putSignedInfoCanonAlg(gen,L"C14N");
    CkXmlDSigGenW_putSignedInfoDigestMethod(gen,L"sha256");

    // -------- Reference 1 --------
    xml1 = CkXmlW_Create();
    CkXmlW_putTag(xml1,L"Transforms");
    CkXmlW_UpdateAttrAt(xml1,L"Transform",TRUE,L"Algorithm",L"http://www.w3.org/2000/09/xmldsig#enveloped-signature");
    CkXmlW_UpdateAttrAt(xml1,L"Transform[1]",TRUE,L"Algorithm",L"http://www.w3.org/2001/10/xml-exc-c14n#");

    CkXmlDSigGenW_AddSameDocRef2(gen,L"01800228774059001001501012022091516941989060",L"sha256",xml1,L"");

    // Provide a certificate + private key. (PFX password is test123)
    cert = CkCertW_Create();
    success = CkCertW_LoadPfxFile(cert,L"qa_data/pfx/cert_test123.pfx",L"test123");
    if (success != TRUE) {
        wprintf(L"%s\n",CkCertW_lastErrorText(cert));
        CkXmlW_Dispose(xmlToSign);
        CkXmlDSigGenW_Dispose(gen);
        CkXmlW_Dispose(xml1);
        CkCertW_Dispose(cert);
        return;
    }

    CkXmlDSigGenW_SetX509Cert(gen,cert,TRUE);

    CkXmlDSigGenW_putKeyInfoType(gen,L"X509Data");
    CkXmlDSigGenW_putX509Type(gen,L"Certificate");

    // Load XML to be signed...
    sbXml = CkStringBuilderW_Create();
    CkXmlW_GetXmlSb(xmlToSign,sbXml);

    CkXmlDSigGenW_putBehaviors(gen,L"IndentedSignature");

    // Sign the XML...
    success = CkXmlDSigGenW_CreateXmlDSigSb(gen,sbXml);
    if (success != TRUE) {
        wprintf(L"%s\n",CkXmlDSigGenW_lastErrorText(gen));
        CkXmlW_Dispose(xmlToSign);
        CkXmlDSigGenW_Dispose(gen);
        CkXmlW_Dispose(xml1);
        CkCertW_Dispose(cert);
        CkStringBuilderW_Dispose(sbXml);
        return;
    }

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

    // Save the signed XML to a file.
    success = CkStringBuilderW_WriteFile(sbXml,L"c:/temp/qa_output/signedXml.xml",L"utf-8",FALSE);

    wprintf(L"%s\n",CkStringBuilderW_getAsString(sbXml));

    // ----------------------------------------
    // Verify the signatures we just produced...
    verifier = CkXmlDSigW_Create();
    success = CkXmlDSigW_LoadSignatureSb(verifier,sbXml);
    if (success != TRUE) {
        wprintf(L"%s\n",CkXmlDSigW_lastErrorText(verifier));
        CkXmlW_Dispose(xmlToSign);
        CkXmlDSigGenW_Dispose(gen);
        CkXmlW_Dispose(xml1);
        CkCertW_Dispose(cert);
        CkStringBuilderW_Dispose(sbXml);
        CkXmlDSigW_Dispose(verifier);
        return;
    }

    numSigs = CkXmlDSigW_getNumSignatures(verifier);
    verifyIdx = 0;
    while (verifyIdx < numSigs) {
        CkXmlDSigW_putSelector(verifier,verifyIdx);
        verified = CkXmlDSigW_VerifySignature(verifier,TRUE);
        if (verified != TRUE) {
            wprintf(L"%s\n",CkXmlDSigW_lastErrorText(verifier));
            CkXmlW_Dispose(xmlToSign);
            CkXmlDSigGenW_Dispose(gen);
            CkXmlW_Dispose(xml1);
            CkCertW_Dispose(cert);
            CkStringBuilderW_Dispose(sbXml);
            CkXmlDSigW_Dispose(verifier);
            return;
        }

        verifyIdx = verifyIdx + 1;
    }

    wprintf(L"All signatures were successfully verified.\n");


    CkXmlW_Dispose(xmlToSign);
    CkXmlDSigGenW_Dispose(gen);
    CkXmlW_Dispose(xml1);
    CkCertW_Dispose(cert);
    CkStringBuilderW_Dispose(sbXml);
    CkXmlDSigW_Dispose(verifier);

    }
 

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