Lua

Sign Italian SPID Metadata XML

See more XML Digital Signatures Examples

Demonstrates how to create an XML digital signature for Italian SPID Metadata. Lua

local chilkat = require("chilkat")

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

local success = true

-- Load the XML to be signed.
local sbXml = chilkat.StringBuilder.new()
success = sbXml:load_file("qa_data/xml_dsig/spid_metadata.xml", "utf-8")
if not success then
    print("Failed to load the input file.")
    return
end

-- The XML to sign contains XML such as this:

-- <?xml version="1.0" encoding="utf-8"?>
-- <md:EntityDescriptor xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" entityID="https://***.it" ID="_AE17AFFF-A600-49D5-B81D-76EEA55B50FF">
--     <md:SPSSODescriptor protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol" AuthnRequestsSigned="true" WantAssertionsSigned="true">
--         <md:KeyDescriptor use="signing">
--             <ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
--                 <ds:X509Data>
--                     <ds:X509Certificate>MIIF5...</ds:X509Certificate>
--                 </ds:X509Data>
--             </ds:KeyInfo>
--         </md:KeyDescriptor>
--         <md:KeyDescriptor use="encryption">
--             <ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
--                 <ds:X509Data>
--                     <ds:X509Certificate>MIIF5...</ds:X509Certificate>
--                 </ds:X509Data>
--             </ds:KeyInfo>
--         </md:KeyDescriptor>
--         <md:SingleLogoutService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="https://***.it/it-it/spid/logout"/>
--         <md:NameIDFormat>urn:oasis:names:tc:SAML:2.0:nameid-format:transient</md:NameIDFormat>
--         <md:AssertionConsumerService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="https://***.it/it-it/spid/loginresp" index="0" isDefault="true"/>
--         <md:AttributeConsumingService index="1">
--             <md:ServiceName xml:lang="it">Servizi Online</md:ServiceName>
--             <md:ServiceDescription xml:lang="it">Accesso ai Servizi Online</md:ServiceDescription>
--             <md:RequestedAttribute Name="spidCode" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"/>
--             <md:RequestedAttribute Name="name" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"/>
--             <md:RequestedAttribute Name="familyName" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"/>
--             <md:RequestedAttribute Name="fiscalNumber" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"/>
--         </md:AttributeConsumingService>
--     </md:SPSSODescriptor>
--     <md:Organization>
--         <md:OrganizationName xml:lang="it">SomeCompany s.r.l.</md:OrganizationName>
--         <md:OrganizationDisplayName xml:lang="it">SomeCompany s.r.l.</md:OrganizationDisplayName>
--         <md:OrganizationURL xml:lang="it">https://***.it</md:OrganizationURL>
--     </md:Organization>
-- </md:EntityDescriptor>

local gen = chilkat.XmlDSigGen.new()

gen.sig_location = "md:EntityDescriptor|md:SPSSODescriptor"
gen.sig_location_mod = 2
gen.signed_info_canon_alg = "EXCL_C14N"
gen.signed_info_digest_method = "sha256"

-- -------- Reference 1 --------
gen:add_same_doc_ref("_AE17AFFF-A600-49D5-B81D-76EEA55B50FF", "sha256", "EXCL_C14N", "", "")

-- 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"

gen.behaviors = "IndentedSignature,ForceAddEnvelopedSignatureTransform,OmitAlreadyDefinedSigNamespace"

-- 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("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.")