(Unicode C++) SII XML Digital Signature

Example for SII XML Digital Signature.

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#include <CkXmlW.h>
#include <CkXmlDSigGenW.h>
#include <CkCertW.h>
#include <CkStringBuilderW.h>
#include <CkXmlDSigW.h>

void ChilkatSample(void)
    {
    bool success = true;

    // Load the XML to be signed.
    CkXmlW xmlToSign;
    success = xmlToSign.LoadXmlFile(L"c:/aaworkarea/eduardo/sii_unsigned.xml");
    if (success == false) {
        wprintf(L"%s\n",xmlToSign.lastErrorText());
        return;
    }

    // The sample XML to be signed looks like this:

    // <?xml version="1.0" encoding="ISO-8859-1"?>
    // <EnvioDTE 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" version="1.0">
    // <SetDTE ID="SetDocF0T33_20240425_170512">
    //  <Caratula version="1.0">
    //   <RutEmisor>99999999-4</RutEmisor>
    //   <RutEnvia>12345678-6</RutEnvia>
    //   <RutReceptor>888888000-K</RutReceptor>
    //   <FchResol>2014-08-22</FchResol>
    //   <NroResol>80</NroResol>
    //   <TmstFirmaEnv>2024-04-25T17:05:13</TmstFirmaEnv>
    //   <SubTotDTE>
    //    <TpoDTE>33</TpoDTE>
    //    <NroDTE>1</NroDTE>
    //   </SubTotDTE>
    //  </Caratula>
    // <DTE version="1.0">
    // <Documento ID="F555T55">
    // ...
    // </Documento>
    // </EnvioDTE>

    CkXmlDSigGenW gen;

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

    // -------- Reference 1 --------
    CkXmlW xml1;
    xml1.put_Tag(L"Transforms");
    xml1.UpdateAttrAt(L"Transform",true,L"Algorithm",L"http://www.w3.org/TR/2001/REC-xml-c14n-20010315");

    gen.AddSameDocRef2(L"F511T33",L"sha1",xml1,L"");

    // Provide a certificate + private key. (PFX password is test123)
    CkCertW cert;
    success = cert.LoadPfxFile(L"qa_data/pfx/cert_test123.pfx",L"test123");
    if (success != true) {
        wprintf(L"%s\n",cert.lastErrorText());
        return;
    }

    gen.SetX509Cert(cert,true);

    gen.put_KeyInfoType(L"X509Data+KeyValue");
    gen.put_X509Type(L"Certificate");

    // Load XML to be signed...
    CkStringBuilderW sbXml;
    xmlToSign.GetXmlSb(sbXml);

    gen.put_Behaviors(L"IndentedSignature");

    // Sign the XML...
    success = gen.CreateXmlDSigSb(sbXml);
    if (success != true) {
        wprintf(L"%s\n",gen.lastErrorText());
        return;
    }

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

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

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

    // ----------------------------------------
    // Verify the signatures we just produced...
    CkXmlDSigW verifier;
    success = verifier.LoadSignatureSb(sbXml);
    if (success != true) {
        wprintf(L"%s\n",verifier.lastErrorText());
        return;
    }

    int numSigs = verifier.get_NumSignatures();
    int verifyIdx = 0;
    while (verifyIdx < numSigs) {
        verifier.put_Selector(verifyIdx);
        bool verified = verifier.VerifySignature(true);
        if (verified != true) {
            wprintf(L"%s\n",verifier.lastErrorText());
            return;
        }

        verifyIdx = verifyIdx + 1;
    }

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