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(PowerBuilder) SII Chile - FRMA Signature Computation and Add to XML

Compute the FRMA signature of a <DA> element enclosed inside a <CAF> element of the XML to be signed.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Xml
integer li_Success
oleobject loo_DaXml
oleobject loo_SbFlattened
oleobject loo_PrivKey
oleobject loo_Rsa
string ls_Sig

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

// Also see:  Compute the FRMT Signature and Add to XML

loo_Xml = create oleobject
li_rc = loo_Xml.ConnectToNewObject("Chilkat_9_5_0.Xml")
if li_rc < 0 then
    destroy loo_Xml
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// Load the unsigned XML that contains the following:

// <DTE version="1.0">
//   <Documento ID="F60T33">
//         <TED version="1.0">
//             <DD>
// 		...
//                 <CAF version="1.0">
//                     <DA>
// 			...
//                     </DA>
// 			... The FRMA will be added here ...
//                 </CAF>
//                 ...
//             </DD>
//             ... The FRMT will be added here in another example ...
//         </TED>
//   </Documento>
// </DTE>

li_Success = loo_Xml.LoadXmlFile("qa_data/xml_dsig/sii_cl/test_0.xml")
if li_Success = 0 then
    Write-Debug "Failed to load initial XML file."
    destroy loo_Xml
    return
end if

// Get a reference to the "DA" element
loo_DaXml = loo_Xml.FindChild("Documento|TED|DD|CAF|DA")
if loo_Xml.LastMethodSuccess = 0 then
    Write-Debug "Failed to find DA element"
    destroy loo_Xml
    return
end if

//  We need to get the "flattened" DA XML where:
//    - No whitespace between elements.
//    - The 5 pre-defined entities are converted.
//    - The text is encoded in the ISO-8859-1 character set (Latin-1), 
loo_SbFlattened = create oleobject
li_rc = loo_SbFlattened.ConnectToNewObject("Chilkat_9_5_0.StringBuilder")

loo_DaXml.EmitCompact = 1
loo_DaXml.EmitXmlDecl = 0
loo_DaXml.GetXmlSb(loo_SbFlattened)

// Compute the SHA-1 message digest of the iso-8859-1 byte representation, 
// and sign it with our RSA private key, getting the result in base64 format.

loo_PrivKey = create oleobject
li_rc = loo_PrivKey.ConnectToNewObject("Chilkat_9_5_0.PrivateKey")

li_Success = loo_PrivKey.LoadAnyFormatFile("qa_data/rsa/rsaPrivKey_pkcs8.pem","")
if li_Success = 0 then
    Write-Debug loo_PrivKey.LastErrorText
    destroy loo_Xml
    destroy loo_SbFlattened
    destroy loo_PrivKey
    return
end if

loo_Rsa = create oleobject
li_rc = loo_Rsa.ConnectToNewObject("Chilkat_9_5_0.Rsa")

loo_Rsa.ImportPrivateKeyObj(loo_PrivKey)

loo_Rsa.EncodingMode = "base64"
loo_Rsa.Charset = "iso-8859-1"
ls_Sig = loo_Rsa.SignStringENC(loo_SbFlattened.GetAsString(),"sha1")

// Add the FRMA signature element to the XML.
loo_Xml.UpdateChildContent("Documento|TED|DD|CAF|FRMA",ls_Sig)
loo_Xml.UpdateAttrAt("Documento|TED|DD|CAF|FRMA",1,"algoritmo","SHA1withRSA")

destroy loo_DaXml

// See what we have:
loo_Xml.EmitCompact = 0
loo_Xml.EmitXmlDecl = 1
Write-Debug loo_Xml.GetXml()

loo_Xml.SaveXml("qa_data/xml_dsig/sii_cl/test_1.xml")


destroy loo_Xml
destroy loo_SbFlattened
destroy loo_PrivKey
destroy loo_Rsa

 

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