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(MFC) Create AuthNRequest with embedded signature (HTTP-POST binding)

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

Chilkat C/C++ Library Downloads

MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkXml.h>
#include <CkXmlDSigGen.h>
#include <CkCert.h>
#include <CkStringBuilder.h>
#include <CkXmlDSig.h>

void ChilkatSample(void)
    {
    CkString strOut;

    // 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

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

    CkXmlDSigGen gen;

    gen.put_SigLocation("samlp:AuthnRequest");
    gen.put_SigNamespacePrefix("ds");
    gen.put_SigNamespaceUri("http://www.w3.org/2000/09/xmldsig#");
    gen.put_SignedInfoCanonAlg("EXCL_C14N");
    gen.put_SignedInfoDigestMethod("sha1");

    // -------- Reference 1 --------
    gen.AddSameDocRef("pfx41d8ef22-e612-8c50-9960-1b16f15741b3","sha1","EXCL_C14N","","");

    // Provide a certificate + private key. (PFX password is test123)
    CkCert cert;
    success = cert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123");
    if (success != true) {
        strOut.append(cert.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    gen.SetX509Cert(cert,true);

    gen.put_KeyInfoType("X509Data");
    gen.put_X509Type("Certificate");

    // Load XML to be signed...
    CkStringBuilder sbXml;
    xmlToSign.GetXmlSb(sbXml);

    gen.put_Behaviors("IndentedSignature,ForceAddEnvelopedSignatureTransform");

    // Sign the XML...
    success = gen.CreateXmlDSigSb(sbXml);
    if (success != true) {
        strOut.append(gen.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Save the signed XMl to a file.
    success = sbXml.WriteFile("qa_output/signedXml.xml","utf-8",false);

    // A sample of the signed XML is shown below..
    strOut.append(sbXml.getAsString());
    strOut.append("\r\n");

    // ----------------------------------------
    // Verify the signature we just produced...
    CkXmlDSig verifier;
    success = verifier.LoadSignatureSb(sbXml);
    if (success != true) {
        strOut.append(verifier.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    bool verified = verifier.VerifySignature(true);
    if (verified != true) {
        strOut.append(verifier.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    strOut.append("This signature was successfully verified.");
    strOut.append("\r\n");

    // -----------------------------------------
    // 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>
    // 


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }

 

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