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Lua

Create AuthNRequest with embedded signature (HTTP-POST binding)

See more XML Digital Signatures Examples

Demonstrates how to create a SAML AuthNRequest with embedded signature (HTTP-POST binding).

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Lua 
local chilkat = require("chilkat")

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

-- This example will sign the following SAML AuthNRequest:

-- <samlp:AuthnRequest
--      xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol"
--      xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion"
--      ID="pfx41d8ef22-e612-8c50-9960-1b16f15741b3"
--      Version="2.0" ProviderName="SP test" IssueInstant="2014-07-16T23:52:45Z"
--      Destination="http://idp.example.com/SSOService.php"
--      ProtocolBinding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST"
--      AssertionConsumerServiceURL="http://sp.example.com/demo1/index.php?acs">
--   <saml:Issuer>http://sp.example.com/demo1/metadata.php</saml:Issuer>
--   <samlp:NameIDPolicy Format="urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress" AllowCreate="true"/>
--   <samlp:RequestedAuthnContext Comparison="exact">
--     <saml:AuthnContextClassRef>urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport</saml:AuthnContextClassRef>
--   </samlp:RequestedAuthnContext>
-- </samlp:AuthnRequest>

-- First we build the XML to be signed.
--
-- Use this online tool to generate the code from sample XML:
-- Generate Code to Create XML

local success = true
local xmlToSign = chilkat.Xml.new()
xmlToSign.tag = "samlp:AuthnRequest"
xmlToSign:add_attribute("xmlns:samlp", "urn:oasis:names:tc:SAML:2.0:protocol")
xmlToSign:add_attribute("xmlns:saml", "urn:oasis:names:tc:SAML:2.0:assertion")
xmlToSign:add_attribute("ID", "pfx41d8ef22-e612-8c50-9960-1b16f15741b3")
xmlToSign:add_attribute("Version", "2.0")
xmlToSign:add_attribute("ProviderName", "SP test")
xmlToSign:add_attribute("IssueInstant", "2014-07-16T23:52:45Z")
xmlToSign:add_attribute("Destination", "http://idp.example.com/SSOService.php")
xmlToSign:add_attribute("ProtocolBinding", "urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST")
xmlToSign:add_attribute("AssertionConsumerServiceURL", "http://sp.example.com/demo1/index.php?acs")
xmlToSign:update_child_content("saml:Issuer", "http://sp.example.com/demo1/metadata.php")
xmlToSign:update_attr_at("samlp:NameIDPolicy", true, "Format", "urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress")
xmlToSign:update_attr_at("samlp:NameIDPolicy", true, "AllowCreate", "true")
xmlToSign:update_attr_at("samlp:RequestedAuthnContext", true, "Comparison", "exact")
xmlToSign:update_child_content("samlp:RequestedAuthnContext|saml:AuthnContextClassRef", "urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport")

-- Also see the online tool to generate the code from sample already-signed XML:
-- Generate XML Signature Creation Code from an Already-Signed XML Sample

local gen = chilkat.XmlDSigGen.new()

gen.sig_location = "samlp:AuthnRequest"
gen.sig_namespace_prefix = "ds"
gen.sig_namespace_uri = "http://www.w3.org/2000/09/xmldsig#"
gen.signed_info_canon_alg = "EXCL_C14N"
gen.signed_info_digest_method = "sha1"

-- -------- Reference 1 --------
gen:add_same_doc_ref("pfx41d8ef22-e612-8c50-9960-1b16f15741b3", "sha1", "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"
gen.x509_type = "Certificate"

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

gen.behaviors = "IndentedSignature,ForceAddEnvelopedSignatureTransform"

-- 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)

-- A sample of the signed XML is shown below..
print(sbXml:get_as_string())

-- ----------------------------------------
-- Verify the signature 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 verified = verifier:verify_signature(true)
if not verified then
    print(verifier.last_error_text)
    return
end

print("This signature was successfully verified.")

-- -----------------------------------------
-- Sample output of AuthNRequest signed XML:
-- (Line-breaks and some indenting added for readability..)

-- <?xml version="1.0" encoding="utf-8"?>
-- <samlp:AuthnRequest
--   xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol"
--   xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion"
--   ID="pfx41d8ef22-e612-8c50-9960-1b16f15741b3"
--   Version="2.0" ProviderName="SP test"
--   IssueInstant="2014-07-16T23:52:45Z"
--   Destination="http://idp.example.com/SSOService.php"
--   ProtocolBinding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST"
--   AssertionConsumerServiceURL="http://sp.example.com/demo1/index.php?acs">
--     <saml:Issuer>http://sp.example.com/demo1/metadata.php</saml:Issuer>
--     <samlp:NameIDPolicy Format="urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress" AllowCreate="true"/>
--     <samlp:RequestedAuthnContext Comparison="exact">
--         <saml:AuthnContextClassRef>urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport</saml:AuthnContextClassRef>
--     </samlp:RequestedAuthnContext>
--     <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
--       <ds:SignedInfo>
--         <ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
--         <ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/>
--         <ds:Reference URI="#pfx41d8ef22-e612-8c50-9960-1b16f15741b3">
--           <ds:Transforms>
--             <ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
--             <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
--           </ds:Transforms>
--           <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
--           <ds:DigestValue>5d+/YNShy4qnvZcvik8fHHg2SWQ=</ds:DigestValue>
--         </ds:Reference>
--       </ds:SignedInfo>
--       <ds:SignatureValue>QS16H5...U5LQ==</ds:SignatureValue>
--       <ds:KeyInfo>
--         <ds:X509Data>
--           <ds:X509Certificate>MIIF...tjlF4=</ds:X509Certificate>
--         </ds:X509Data>
--       </ds:KeyInfo>
--     </ds:Signature>
-- </samlp:AuthnRequest>
--