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Lianja

Apply 2nd Signature to sii.cl Factura Electrónica (Chile Servicio de Impuestos Internos)

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Demonstrates how to apply the 2nd signature an XML invoice according to Chilean Internal Revenue Service regulations.

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llSuccess = .F.

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

// In this example: Create sii.cl Factura Electr�nica (Chile Servicio de Impuestos Internos)
// We signed XML structured like this:

// <?xml version="1.0" encoding="iso-8859-1"?>
// <DTE version="1.0" xmlns="http://www.sii.cl/SiiDte">
//   <Documento ID="F11T22">
//     ...
//   </Documento>
// </DTE>

// To get a signature like this:
// <?xml version="1.0" encoding="iso-8859-1"?>
// <DTE version="1.0" xmlns="http://www.sii.cl/SiiDte">
//   <Documento ID="F11T22">
//     ...
//   </Documento>
//   <Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
//     ..
//   </Signature>
// </DTE>

// Now we wish to wrap the result of the 1st example in the following and sign again:

// <?xml version="1.0" encoding="iso-8859-1"?>
// <EnvioDTE version="1.0" xmlns="http://www.sii.cl/SiiDte" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sii.cl/SiiDte EnvioDTE_v10.xsd">
//     <SetDTE ID="NDTECHILE">
//         <Caratula version="1.0">
//             <RutEmisor>...</RutEmisor>
//             <RutEnvia>...</RutEnvia>
//             <RutReceptor>...</RutReceptor>
//             <FchResol>2014-08-22</FchResol>
//             <NroResol>80</NroResol>
//             <TmstFirmaEnv>2020-07-17T13:19:10</TmstFirmaEnv>
//             <SubTotDTE>
//                 <TpoDTE>34</TpoDTE>
//                 <NroDTE>1</NroDTE>
//             </SubTotDTE>
//         </Caratula>
//         <DTE version="1.0" xmlns="http://www.sii.cl/SiiDte">
//             <Documento ID="F11T22">...</Documento>
//             <Signature xmlns="http://www.w3.org/2000/09/xmldsig#">..</Signature>
//         </DTE>
//     </SetDTE>
// </EnvioDTE>

// The result will be this:

// <?xml version="1.0" encoding="iso-8859-1"?>
// <EnvioDTE version="1.0" xmlns="http://www.sii.cl/SiiDte" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sii.cl/SiiDte EnvioDTE_v10.xsd">
//     <SetDTE ID="NDTECHILE">
//         <Caratula version="1.0">
//             <RutEmisor>...</RutEmisor>
//             <RutEnvia>...</RutEnvia>
//             <RutReceptor>...</RutReceptor>
//             <FchResol>2014-08-22</FchResol>
//             <NroResol>80</NroResol>
//             <TmstFirmaEnv>2020-07-17T13:19:10</TmstFirmaEnv>
//             <SubTotDTE>
//                 <TpoDTE>34</TpoDTE>
//                 <NroDTE>1</NroDTE>
//             </SubTotDTE>
//         </Caratula>
//         <DTE version="1.0" xmlns="http://www.sii.cl/SiiDte">
//             <Documento ID="F11T22">...</Documento>
//             <Signature xmlns="http://www.w3.org/2000/09/xmldsig#">..</Signature>
//         </DTE>
//     </SetDTE>
//     <Signature xmlns="http://www.w3.org/2000/09/xmldsig#">..</Signature>
// </EnvioDTE>

loGen = createobject("CkXmlDSigGen")

loGen.SigLocation = "EnvioDTE"
loGen.SigLocationMod = 0
loGen.SigNamespacePrefix = ""
loGen.SigNamespaceUri = "http://www.w3.org/2000/09/xmldsig#"
loGen.SignedInfoCanonAlg = "C14N"
loGen.SignedInfoDigestMethod = "sha1"

// -------- Reference 1 --------
loGen.AddSameDocRef("NDTECHILE","sha1","","","")

// Provide a certificate + private key. (PFX password is test123)
loCert = createobject("CkCert")
llSuccess = loCert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123")
if (llSuccess <> .T.) then
    ? loCert.LastErrorText
    release loGen
    release loCert
    return
endif

loGen.SetX509Cert(loCert,.T.)

loGen.KeyInfoType = "X509Data+KeyValue"
loGen.X509Type = "Certificate"

// Here's the part where we must be very careful not to disturb the existing signature.
// We want to encapsulate the existing signed XML like this:

// <?xml version="1.0" encoding="iso-8859-1"?>
// <EnvioDTE version="1.0" xmlns="http://www.sii.cl/SiiDte" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sii.cl/SiiDte EnvioDTE_v10.xsd">
//     <SetDTE ID="NDTECHILE">
//         <Caratula version="1.0">
//             <RutEmisor>...</RutEmisor>
//             <RutEnvia>...</RutEnvia>
//             <RutReceptor>...</RutReceptor>
//             <FchResol>2014-08-22</FchResol>
//             <NroResol>80</NroResol>
//             <TmstFirmaEnv>2020-07-17T13:19:10</TmstFirmaEnv>
//             <SubTotDTE>
//                 <TpoDTE>34</TpoDTE>
//                 <NroDTE>1</NroDTE>
//             </SubTotDTE>
//         </Caratula>
//         <EXISTING_SIGNED_XML>HERE</EXISTING_SIGNED_XML>
//     </SetDTE>
//     <Signature xmlns="http://www.w3.org/2000/09/xmldsig#">..</Signature>
// </EnvioDTE>

loXml = createobject("CkXml")
loXml.Tag = "EnvioDTE"
loXml.AddAttribute("version","1.0")
loXml.AddAttribute("xmlns","http://www.sii.cl/SiiDte")
loXml.AddAttribute("xmlns:xsi","http://www.w3.org/2001/XMLSchema-instance")
loXml.AddAttribute("xsi:schemaLocation","http://www.sii.cl/SiiDte EnvioDTE_v10.xsd")
loXml.UpdateAttrAt("SetDTE",.T.,"ID","NDTECHILE")
loXml.UpdateAttrAt("SetDTE|Caratula",.T.,"version","1.0")
loXml.UpdateChildContent("SetDTE|Caratula|RutEmisor","...")
loXml.UpdateChildContent("SetDTE|Caratula|RutEnvia","...")
loXml.UpdateChildContent("SetDTE|Caratula|RutReceptor","...")
loXml.UpdateChildContent("SetDTE|Caratula|FchResol","2014-08-22")
loXml.UpdateChildContent("SetDTE|Caratula|NroResol","80")
loXml.UpdateChildContent("SetDTE|Caratula|TmstFirmaEnv","2020-07-17T13:19:10")
loXml.UpdateChildContent("SetDTE|Caratula|SubTotDTE|TpoDTE","34")
loXml.UpdateChildContent("SetDTE|Caratula|SubTotDTE|NroDTE","1")
loXml.UpdateChildContent("SetDTE|EXISTING_SIGNED_XML","HERE")

loSbXml = createobject("CkStringBuilder")
loXml.GetXmlSb(loSbXml)

// Load our existing signed XML.
// We cannot load it into a Chilkat XML object because we cannot allow anything to change,
// not even indentation or whitespace.
loSbExisting = createobject("CkStringBuilder")
loSbExisting.LoadFile("qa_data/xml_dsig/sii_cl/signed1.xml","iso-8859-1")

// However, we must remove the XML declarator, and we can trim the whitespace at the very front and back (i.e. whitespace completely outside the document).
lnNumReplaced = loSbExisting.Replace('<?xml version="1.0" encoding="iso-8859-1"?>',"")
loSbExisting.Trim()

// Insert the existing signed XML into the new XML document to be signed.
lnNumReplaced = loSbXml.Replace("<EXISTING_SIGNED_XML>HERE</EXISTING_SIGNED_XML>",loSbExisting.GetAsString())

// We now have the XML document ready for the 2nd signature to be applied...

// Make sure we add the "SignExistingSignatures" behavior so that this signature includes the original signature in the digest.
loGen.Behaviors = "IndentedSignature,SignExistingSignatures"

// Sign the XML...
llSuccess = loGen.CreateXmlDSigSb(loSbXml)
if (llSuccess <> .T.) then
    ? loGen.LastErrorText
    release loGen
    release loCert
    release loXml
    release loSbXml
    release loSbExisting
    return
endif

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

// Change the XML declarator to indicate iso-8859-1 (because we'll be saving using iso-8859-1)
lnNumReplaced = loSbXml.Replace('encoding="utf-8"?>','encoding="iso-8859-1"?>')

// Save the signed XML to a file.
llSuccess = loSbXml.WriteFile("qa_data/xml_dsig/sii_cl/signed2.xml","iso-8859-1",.F.)

? loSbXml.GetAsString()


release loGen
release loCert
release loXml
release loSbXml
release loSbExisting