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Visual FoxPro

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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LOCAL lnSuccess
LOCAL loXmlToSign
LOCAL loGen
LOCAL loCert
LOCAL loSbXml
LOCAL loVerifier
LOCAL lnVerified

lnSuccess = 0

* 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

lnSuccess = 1
loXmlToSign = CreateObject('Chilkat.Xml')
loXmlToSign.Tag = "samlp:AuthnRequest"
loXmlToSign.AddAttribute("xmlns:samlp","urn:oasis:names:tc:SAML:2.0:protocol")
loXmlToSign.AddAttribute("xmlns:saml","urn:oasis:names:tc:SAML:2.0:assertion")
loXmlToSign.AddAttribute("ID","pfx41d8ef22-e612-8c50-9960-1b16f15741b3")
loXmlToSign.AddAttribute("Version","2.0")
loXmlToSign.AddAttribute("ProviderName","SP test")
loXmlToSign.AddAttribute("IssueInstant","2014-07-16T23:52:45Z")
loXmlToSign.AddAttribute("Destination","http://idp.example.com/SSOService.php")
loXmlToSign.AddAttribute("ProtocolBinding","urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST")
loXmlToSign.AddAttribute("AssertionConsumerServiceURL","http://sp.example.com/demo1/index.php?acs")
loXmlToSign.UpdateChildContent("saml:Issuer","http://sp.example.com/demo1/metadata.php")
loXmlToSign.UpdateAttrAt("samlp:NameIDPolicy",1,"Format","urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress")
loXmlToSign.UpdateAttrAt("samlp:NameIDPolicy",1,"AllowCreate","true")
loXmlToSign.UpdateAttrAt("samlp:RequestedAuthnContext",1,"Comparison","exact")
loXmlToSign.UpdateChildContent("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

loGen = CreateObject('Chilkat.XmlDSigGen')

loGen.SigLocation = "samlp:AuthnRequest"
loGen.SigNamespacePrefix = "ds"
loGen.SigNamespaceUri = "http://www.w3.org/2000/09/xmldsig#"
loGen.SignedInfoCanonAlg = "EXCL_C14N"
loGen.SignedInfoDigestMethod = "sha1"

* -------- Reference 1 --------
loGen.AddSameDocRef("pfx41d8ef22-e612-8c50-9960-1b16f15741b3","sha1","EXCL_C14N","","")

* Provide a certificate + private key. (PFX password is test123)
loCert = CreateObject('Chilkat.Cert')
lnSuccess = loCert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123")
IF (lnSuccess <> 1) THEN
    ? loCert.LastErrorText
    RELEASE loXmlToSign
    RELEASE loGen
    RELEASE loCert
    CANCEL
ENDIF

loGen.SetX509Cert(loCert,1)

loGen.KeyInfoType = "X509Data"
loGen.X509Type = "Certificate"

* Load XML to be signed...
loSbXml = CreateObject('Chilkat.StringBuilder')
loXmlToSign.GetXmlSb(loSbXml)

loGen.Behaviors = "IndentedSignature,ForceAddEnvelopedSignatureTransform"

* Sign the XML...
lnSuccess = loGen.CreateXmlDSigSb(loSbXml)
IF (lnSuccess <> 1) THEN
    ? loGen.LastErrorText
    RELEASE loXmlToSign
    RELEASE loGen
    RELEASE loCert
    RELEASE loSbXml
    CANCEL
ENDIF

* Save the signed XMl to a file.
lnSuccess = loSbXml.WriteFile("qa_output/signedXml.xml","utf-8",0)

* A sample of the signed XML is shown below..
? loSbXml.GetAsString()

* ----------------------------------------
* Verify the signature we just produced...
loVerifier = CreateObject('Chilkat.XmlDSig')
lnSuccess = loVerifier.LoadSignatureSb(loSbXml)
IF (lnSuccess <> 1) THEN
    ? loVerifier.LastErrorText
    RELEASE loXmlToSign
    RELEASE loGen
    RELEASE loCert
    RELEASE loSbXml
    RELEASE loVerifier
    CANCEL
ENDIF

lnVerified = loVerifier.VerifySignature(1)
IF (lnVerified <> 1) THEN
    ? loVerifier.LastErrorText
    RELEASE loXmlToSign
    RELEASE loGen
    RELEASE loCert
    RELEASE loSbXml
    RELEASE loVerifier
    CANCEL
ENDIF

? "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>
* 

RELEASE loXmlToSign
RELEASE loGen
RELEASE loCert
RELEASE loSbXml
RELEASE loVerifier