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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