Lua

SII XML Digital Signature

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Example for SII XML Digital Signature. Lua

local chilkat = require("chilkat")

local success = true

-- Load the XML to be signed.
local xmlToSign = chilkat.Xml.new()
success = xmlToSign:load_xml_file("c:/aaworkarea/eduardo/sii_unsigned.xml")
if not success then
    print(xmlToSign.last_error_text)
    return
end

-- 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>

local gen = chilkat.XmlDSigGen.new()

gen.sig_location = "EnvioDTE|SetDTE|DTE"
gen.sig_location_mod = 0
gen.sig_namespace_prefix = ""
gen.sig_namespace_uri = "http://www.w3.org/2000/09/xmldsig#"
gen.signed_info_canon_alg = "C14N"
gen.signed_info_digest_method = "sha1"

-- -------- Reference 1 --------
local xml1 = chilkat.Xml.new()
xml1.tag = "Transforms"
xml1:update_attr_at("Transform", true, "Algorithm", "http://www.w3.org/TR/2001/REC-xml-c14n-20010315")

gen:add_same_doc_ref2("F511T33", "sha1", xml1, "")

-- Provide a certificate + private key. (PFX password is test123)
local cert = chilkat.Cert.new()
success = cert:load_pfx_file("qa_data/pfx/cert_test123.pfx", "test123")
if not success then
    print(cert.last_error_text)
    return
end

gen:set_x509_cert(cert, true)

gen.key_info_type = "X509Data+KeyValue"
gen.x509_type = "Certificate"

-- Load XML to be signed...
local sbXml = chilkat.StringBuilder.new()
xmlToSign:get_xml_sb(sbXml)

gen.behaviors = "IndentedSignature"

-- Sign the XML...
success = gen:create_xml_dsig_sb(sbXml)
if not success then
    print(gen.last_error_text)
    return
end

-- -----------------------------------------------

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

print(sbXml:get_as_string())

-- ----------------------------------------
-- Verify the signatures we just produced...
local verifier = chilkat.XmlDSig.new()
success = verifier:load_signature_sb(sbXml)
if not success then
    print(verifier.last_error_text)
    return
end

local numSigs = verifier.num_signatures
local verifyIdx = 0
while verifyIdx < numSigs do
    verifier.selector = verifyIdx
    local verified = verifier:verify_signature(true)
    if not verified then
        print(verifier.last_error_text)
        return
    end

    verifyIdx = verifyIdx + 1
end

print("All signatures were successfully verified.")