(DataFlex) 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 ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoGen
    Boolean iSuccess
    Variant vCert
    Handle hoCert
    Boolean iSuccess
    Handle hoXml
    Variant vSbXml
    Handle hoSbXml
    Handle hoSbExisting
    Integer iNumReplaced
    String sTemp1

    // 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>

    Get Create (RefClass(cComChilkatXmlDSigGen)) To hoGen
    If (Not(IsComObjectCreated(hoGen))) Begin
        Send CreateComObject of hoGen
    End

    Set ComSigLocation Of hoGen To "EnvioDTE"
    Set ComSigLocationMod Of hoGen To 0
    Set ComSigNamespacePrefix Of hoGen To ""
    Set ComSigNamespaceUri Of hoGen To "http://www.w3.org/2000/09/xmldsig#"
    Set ComSignedInfoCanonAlg Of hoGen To "C14N"
    Set ComSignedInfoDigestMethod Of hoGen To "sha1"

    // -------- Reference 1 --------
    Get ComAddSameDocRef Of hoGen "NDTECHILE" "sha1" "" "" "" To iSuccess

    // Provide a certificate + private key. (PFX password is test123)
    Get Create (RefClass(cComChilkatCert)) To hoCert
    If (Not(IsComObjectCreated(hoCert))) Begin
        Send CreateComObject of hoCert
    End
    Get ComLoadPfxFile Of hoCert "qa_data/pfx/cert_test123.pfx" "test123" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoCert To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get pvComObject of hoCert to vCert
    Get ComSetX509Cert Of hoGen vCert True To iSuccess

    Set ComKeyInfoType Of hoGen To "X509Data+KeyValue"
    Set ComX509Type Of hoGen To "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>

    Get Create (RefClass(cComChilkatXml)) To hoXml
    If (Not(IsComObjectCreated(hoXml))) Begin
        Send CreateComObject of hoXml
    End
    Set ComTag Of hoXml To "EnvioDTE"
    Get ComAddAttribute Of hoXml "version" "1.0" To iSuccess
    Get ComAddAttribute Of hoXml "xmlns" "http://www.sii.cl/SiiDte" To iSuccess
    Get ComAddAttribute Of hoXml "xmlns:xsi" "http://www.w3.org/2001/XMLSchema-instance" To iSuccess
    Get ComAddAttribute Of hoXml "xsi:schemaLocation" "http://www.sii.cl/SiiDte EnvioDTE_v10.xsd" To iSuccess
    Get ComUpdateAttrAt Of hoXml "SetDTE" True "ID" "NDTECHILE" To iSuccess
    Get ComUpdateAttrAt Of hoXml "SetDTE|Caratula" True "version" "1.0" To iSuccess
    Send ComUpdateChildContent To hoXml "SetDTE|Caratula|RutEmisor" "..."
    Send ComUpdateChildContent To hoXml "SetDTE|Caratula|RutEnvia" "..."
    Send ComUpdateChildContent To hoXml "SetDTE|Caratula|RutReceptor" "..."
    Send ComUpdateChildContent To hoXml "SetDTE|Caratula|FchResol" "2014-08-22"
    Send ComUpdateChildContent To hoXml "SetDTE|Caratula|NroResol" "80"
    Send ComUpdateChildContent To hoXml "SetDTE|Caratula|TmstFirmaEnv" "2020-07-17T13:19:10"
    Send ComUpdateChildContent To hoXml "SetDTE|Caratula|SubTotDTE|TpoDTE" "34"
    Send ComUpdateChildContent To hoXml "SetDTE|Caratula|SubTotDTE|NroDTE" "1"
    Send ComUpdateChildContent To hoXml "SetDTE|EXISTING_SIGNED_XML" "HERE"

    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbXml
    If (Not(IsComObjectCreated(hoSbXml))) Begin
        Send CreateComObject of hoSbXml
    End
    Get pvComObject of hoSbXml to vSbXml
    Get ComGetXmlSb Of hoXml vSbXml To iSuccess

    // 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.
    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbExisting
    If (Not(IsComObjectCreated(hoSbExisting))) Begin
        Send CreateComObject of hoSbExisting
    End
    Get ComLoadFile Of hoSbExisting "qa_data/xml_dsig/sii_cl/signed1.xml" "iso-8859-1" To iSuccess

    // 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).
    Get ComReplace Of hoSbExisting '<?xml version="1.0" encoding="iso-8859-1"?>' "" To iNumReplaced
    Get ComTrim Of hoSbExisting To iSuccess

    // Insert the existing signed XML into the new XML document to be signed.
    Get ComGetAsString Of hoSbExisting To sTemp1
    Get ComReplace Of hoSbXml "<EXISTING_SIGNED_XML>HERE</EXISTING_SIGNED_XML>" sTemp1 To iNumReplaced

    // 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.
    Set ComBehaviors Of hoGen To "IndentedSignature,SignExistingSignatures"

    // Sign the XML...
    Get pvComObject of hoSbXml to vSbXml
    Get ComCreateXmlDSigSb Of hoGen vSbXml To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoGen To sTemp1
        Showln sTemp1
        Procedure_Return
    End

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

    // Change the XML declarator to indicate iso-8859-1 (because we'll be saving using iso-8859-1)
    Get ComReplace Of hoSbXml 'encoding="utf-8"?>' 'encoding="iso-8859-1"?>' To iNumReplaced

    // Save the signed XML to a file.
    Get ComWriteFile Of hoSbXml "qa_data/xml_dsig/sii_cl/signed2.xml" "iso-8859-1" False To iSuccess

    Get ComGetAsString Of hoSbXml To sTemp1
    Showln sTemp1


End_Procedure