(Chilkat2-Python) Sign XML for eFactura DGI Uruguay (cfe.dgi.gub.uy)

Demonstrates how to sign XML for eFactura DGI (Uruguay, cfe.dgi.gub.uy).

Chilkat2 Python Downloads install with pip pip3 install chilkat2 or download... Python Module for Windows, Linux, Alpine Linux, MacOS, Solaris

import sys
import chilkat2

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

success = True

# <?xml version="1.0" encoding="utf-8"?>
# <DGICFE:EnvioCFE version="1.0" xsi:schemaLocation="http://cfe.dgi.gub.uy EnvioCFE_v1.30.xsd" xmlns:DGICFE="http://cfe.dgi.gub.uy" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
#     <DGICFE:Caratula version="1.0">
#         <DGICFE:RutReceptor>...</DGICFE:RutReceptor>
#         <DGICFE:RUCEmisor>...</DGICFE:RUCEmisor>
#         <DGICFE:Idemisor>...</DGICFE:Idemisor>
#         <DGICFE:CantCFE>1</DGICFE:CantCFE>
#         <DGICFE:Fecha>2020-07-29T08:24:34-03:00</DGICFE:Fecha>
#         <DGICFE:X509Certificate>MIIGc...UJwsTEnI
# </DGICFE:X509Certificate>
#     </DGICFE:Caratula>
#     <CFE xmlns="http://cfe.dgi.gub.uy" version="1.0">
#         <eFact>
#             <TmstFirma>2020-07-21T12:34:01-03:00</TmstFirma>
#             <Encabezado>
#                 <IdDoc>
#                     <TipoCFE>111</TipoCFE>
#                     <Serie>A</Serie>
#                     <Nro>...</Nro>
#                     <FchEmis>2020-07-21</FchEmis>
#                     <FmaPago>2</FmaPago>
#                     <FchVenc>2020-09-19</FchVenc>
#                 </IdDoc>
#                 <Emisor>
#                     <RUCEmisor>...</RUCEmisor>
#                     <RznSoc>...</RznSoc>
#                     <NomComercial>...</NomComercial>
#                     <GiroEmis>...</GiroEmis>
#                     <Telefono>(598)...</Telefono>
#                     <Telefono>(598)...</Telefono>
#                     <CorreoEmisor>...</CorreoEmisor>
#                     <EmiSucursal>...</EmiSucursal>
#                     <CdgDGISucur>7</CdgDGISucur>
#                     <DomFiscal>...</DomFiscal>
#                     <Ciudad>Montevideo</Ciudad>
#                     <Departamento>Montevideo</Departamento>
#                 </Emisor>
#                 <Receptor>
#                     <TipoDocRecep>2</TipoDocRecep>
#                     <CodPaisRecep>UY</CodPaisRecep>
#                     <DocRecep>...</DocRecep>
#                     <RznSocRecep>...</RznSocRecep>
#                     <DirRecep>...</DirRecep>
#                     <CiudadRecep>...</CiudadRecep>
#                     <DeptoRecep>...</DeptoRecep>
#                     <PaisRecep/>
#                     <CP>...</CP>
#                     <InfoAdicional/>
#                     <LugarDestEnt>...</LugarDestEnt>
#                     <CompraID>...</CompraID>
#                 </Receptor>
#                 <Totales>
#                     <TpoMoneda>UYU</TpoMoneda>
#                     <MntNoGrv>0.00</MntNoGrv>
#                     <MntExpoyAsim>0.00</MntExpoyAsim>
#                     <MntImpuestoPerc>0.00</MntImpuestoPerc>
#                     <MntIVaenSusp>0.00</MntIVaenSusp>
#                     <MntNetoIvaTasaMin>2701.71</MntNetoIvaTasaMin>
#                     <MntNetoIVATasaBasica>0.00</MntNetoIVATasaBasica>
#                     <MntNetoIVAOtra>0.00</MntNetoIVAOtra>
#                     <IVATasaMin>10.00</IVATasaMin>
#                     <IVATasaBasica>22.00</IVATasaBasica>
#                     <MntIVATasaMin>270.17</MntIVATasaMin>
#                     <MntIVATasaBasica>0.00</MntIVATasaBasica>
#                     <MntIVAOtra>0.00</MntIVAOtra>
#                     <MntTotal>2971.88</MntTotal>
#                     <MntTotRetenido>0.00</MntTotRetenido>
#                     <CantLinDet>1</CantLinDet>
#                     <MontoNF>0.11</MontoNF>
#                     <MntPagar>2971.99</MntPagar>
#                 </Totales>
#             </Encabezado>
#             <Detalle>
#                 <Item>
#                     <NroLinDet>1</NroLinDet>
#                     <IndFact>2</IndFact>
#                     <NomItem>...</NomItem>
#                     <DscItem>...</DscItem>
#                     <Cantidad>4.000</Cantidad>
#                     <UniMed/>
#                     <PrecioUnitario>662.185000</PrecioUnitario>
#                     <DescuentoPct>0.000</DescuentoPct>
#                     <DescuentoMonto>0.00</DescuentoMonto>
#                     <RecargoPct>2.000</RecargoPct>
#                     <RecargoMnt>52.97</RecargoMnt>
#                     <MontoItem>2701.71</MontoItem>
#                 </Item>
#             </Detalle>
#             <CAEData>
#                 <CAE_ID>90200658285</CAE_ID>
#                 <DNro>1015000</DNro>
#                 <HNro>1016999</HNro>
#                 <FecVenc>2022-05-07</FecVenc>
#             </CAEData>
#         </eFact>
#     </CFE>
# </DGICFE:EnvioCFE>

gen = chilkat2.XmlDSigGen()

gen.SigLocation = "DGICFE:EnvioCFE|CFE"
gen.SigLocationMod = 0
gen.SigNamespacePrefix = ""
gen.SigNamespaceUri = "http://www.w3.org/2000/09/xmldsig#"
gen.SignedInfoCanonAlg = "C14N"
gen.SignedInfoDigestMethod = "sha1"

# -------- Reference 1 --------
gen.AddSameDocRef("","sha1","C14N","","")

# Provide a certificate + private key. (PFX password is test123)
cert = chilkat2.Cert()
success = cert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123")
if (success != True):
    print(cert.LastErrorText)
    sys.exit()

gen.SetX509Cert(cert,True)

gen.KeyInfoType = "X509Data"
gen.X509Type = "IssuerSerial"

# Load XML to be signed...
sbXml = chilkat2.StringBuilder()
success = sbXml.LoadFile("qa_data/cfe.dgi.gub.uy/sample.xml","utf-8")
if (success == False):
    print("Failed to load input XML document.")
    sys.exit()

gen.Behaviors = "IndentedSignature,CompactSignedXml"

# Sign the XML...
success = gen.CreateXmlDSigSb(sbXml)
if (success != True):
    print(gen.LastErrorText)
    sys.exit()

# -----------------------------------------------

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

print(sbXml.GetAsString())