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(Go) 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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    success := true

    // Create the XML to be signed...

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

    xmlToSign := chilkat.NewXml()
    xmlToSign.SetTag("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")

    gen := chilkat.NewXmlDSigGen()

    gen.SetSigLocation("rDE")
    gen.SetSigLocationMod(0)
    gen.SetSigNamespacePrefix("")
    gen.SetSigNamespaceUri("http://www.w3.org/2000/09/xmldsig#")
    gen.SetSignedInfoCanonAlg("C14N")
    gen.SetSignedInfoDigestMethod("sha256")

    // -------- Reference 1 --------
    xml1 := chilkat.NewXml()
    xml1.SetTag("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)
    cert := chilkat.NewCert()
    success = cert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123")
    if success != true {
        fmt.Println(cert.LastErrorText())
        xmlToSign.DisposeXml()
        gen.DisposeXmlDSigGen()
        xml1.DisposeXml()
        cert.DisposeCert()
        return
    }

    gen.SetX509Cert(cert,true)

    gen.SetKeyInfoType("X509Data")
    gen.SetX509Type("Certificate")

    // Load XML to be signed...
    sbXml := chilkat.NewStringBuilder()
    xmlToSign.GetXmlSb(sbXml)

    gen.SetBehaviors("IndentedSignature")

    // Sign the XML...
    success = gen.CreateXmlDSigSb(sbXml)
    if success != true {
        fmt.Println(gen.LastErrorText())
        xmlToSign.DisposeXml()
        gen.DisposeXmlDSigGen()
        xml1.DisposeXml()
        cert.DisposeCert()
        sbXml.DisposeStringBuilder()
        return
    }

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

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

    fmt.Println(*sbXml.GetAsString())

    // ----------------------------------------
    // Verify the signatures we just produced...
    verifier := chilkat.NewXmlDSig()
    success = verifier.LoadSignatureSb(sbXml)
    if success != true {
        fmt.Println(verifier.LastErrorText())
        xmlToSign.DisposeXml()
        gen.DisposeXmlDSigGen()
        xml1.DisposeXml()
        cert.DisposeCert()
        sbXml.DisposeStringBuilder()
        verifier.DisposeXmlDSig()
        return
    }

    numSigs := verifier.NumSignatures()
    verifyIdx := 0
    for verifyIdx < numSigs {
        verifier.SetSelector(verifyIdx)
        verified := verifier.VerifySignature(true)
        if verified != true {
            fmt.Println(verifier.LastErrorText())
            xmlToSign.DisposeXml()
            gen.DisposeXmlDSigGen()
            xml1.DisposeXml()
            cert.DisposeCert()
            sbXml.DisposeStringBuilder()
            verifier.DisposeXmlDSig()
            return
        }

        verifyIdx = verifyIdx + 1
    }

    fmt.Println("All signatures were successfully verified.")

    xmlToSign.DisposeXml()
    gen.DisposeXmlDSigGen()
    xml1.DisposeXml()
    cert.DisposeCert()
    sbXml.DisposeStringBuilder()
    verifier.DisposeXmlDSig()
 

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