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

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

Chilkat C/C++ Library Downloads

MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkXmlDSigGen.h>
#include <CkCert.h>
#include <CkXml.h>
#include <CkStringBuilder.h>

void ChilkatSample(void)
    {
    CkString strOut;

    // 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>

    CkXmlDSigGen gen;

    gen.put_SigLocation("EnvioDTE");
    gen.put_SigLocationMod(0);
    gen.put_SigNamespacePrefix("");
    gen.put_SigNamespaceUri("http://www.w3.org/2000/09/xmldsig#");
    gen.put_SignedInfoCanonAlg("C14N");
    gen.put_SignedInfoDigestMethod("sha1");

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

    // Provide a certificate + private key. (PFX password is test123)
    CkCert cert;
    bool success = cert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123");
    if (success != true) {
        strOut.append(cert.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    gen.SetX509Cert(cert,true);

    gen.put_KeyInfoType("X509Data+KeyValue");
    gen.put_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>

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

    CkStringBuilder sbXml;
    xml.GetXmlSb(sbXml);

    // 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.
    CkStringBuilder sbExisting;
    sbExisting.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).
    int numReplaced = sbExisting.Replace("<?xml version=\"1.0\" encoding=\"iso-8859-1\"?>","");
    sbExisting.Trim();

    // Insert the existing signed XML into the new XML document to be signed.
    numReplaced = sbXml.Replace("<EXISTING_SIGNED_XML>HERE</EXISTING_SIGNED_XML>",sbExisting.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.
    gen.put_Behaviors("IndentedSignature,SignExistingSignatures");

    // Sign the XML...
    success = gen.CreateXmlDSigSb(sbXml);
    if (success != true) {
        strOut.append(gen.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

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

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

    // Save the signed XML to a file.
    success = sbXml.WriteFile("qa_data/xml_dsig/sii_cl/signed2.xml","iso-8859-1",false);

    strOut.append(sbXml.getAsString());
    strOut.append("\r\n");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }

 

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