(Delphi ActiveX) Create AuthNRequest with embedded signature (HTTP-POST binding)

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

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
xmlToSign: TChilkatXml;
gen: TChilkatXmlDSigGen;
cert: TChilkatCert;
sbXml: TChilkatStringBuilder;
verifier: TChilkatXmlDSig;
verified: Integer;

begin
// 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

success := 1;
xmlToSign := TChilkatXml.Create(Self);
xmlToSign.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',1,'Format','urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress');
xmlToSign.UpdateAttrAt('samlp:NameIDPolicy',1,'AllowCreate','true');
xmlToSign.UpdateAttrAt('samlp:RequestedAuthnContext',1,'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

gen := TChilkatXmlDSigGen.Create(Self);

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

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

// Provide a certificate + private key. (PFX password is test123)
cert := TChilkatCert.Create(Self);
success := cert.LoadPfxFile('qa_data/pfx/cert_test123.pfx','test123');
if (success <> 1) then
  begin
    Memo1.Lines.Add(cert.LastErrorText);
    Exit;
  end;
gen.SetX509Cert(cert.ControlInterface,1);

gen.KeyInfoType := 'X509Data';
gen.X509Type := 'Certificate';

// Load XML to be signed...
sbXml := TChilkatStringBuilder.Create(Self);
xmlToSign.GetXmlSb(sbXml.ControlInterface);

gen.Behaviors := 'IndentedSignature,ForceAddEnvelopedSignatureTransform';

// Sign the XML...
success := gen.CreateXmlDSigSb(sbXml.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(gen.LastErrorText);
    Exit;
  end;

// Save the signed XMl to a file.
success := sbXml.WriteFile('qa_output/signedXml.xml','utf-8',0);

// A sample of the signed XML is shown below..
Memo1.Lines.Add(sbXml.GetAsString());

// ----------------------------------------
// Verify the signature we just produced...
verifier := TChilkatXmlDSig.Create(Self);
success := verifier.LoadSignatureSb(sbXml.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(verifier.LastErrorText);
    Exit;
  end;

verified := verifier.VerifySignature(1);
if (verified <> 1) then
  begin
    Memo1.Lines.Add(verifier.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add('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>
// 
end;