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(Delphi ActiveX) Create IRS MeF Login Service Request Message

This example demonstrates how to create a digitally signed Login Service Request Message.

This example used the documentation at https://www.irs.gov/pub/irs-utl/mef-doc-stp_ref_guide.pdf as a guide.

It creates signed XML as specified in section 4.1.1 found in Section 4: Example A2A Web Service Messages.

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
pfx: TChilkatPfx;
success: Integer;
signingCert: IChilkatCert;
bdCert: TChilkatBinData;
sbCert64: TChilkatStringBuilder;
xmlToSign: TChilkatXml;
gen: TChilkatXmlDSigGen;
cert: TChilkatCert;
xmlCustomKeyInfo: TChilkatXml;
sbXml: TChilkatStringBuilder;
nReplaced: Integer;

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

// --------------------------------------------------------------------------------
// Also see Chilkat's Online WSDL Code Generator
// to generate code and SOAP Request and Response XML for each operation in a WSDL.
// --------------------------------------------------------------------------------

// The goal of this example is to create signed SOAP XML such as the following:

// <?xml version="1.0" encoding="UTF-8"?>
// <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
//     <SOAP-ENV:Header>
//         <wsse:Security xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">
//             <wsse:BinarySecurityToken 
// 		xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd"
// 		EncodingType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary"
// 		ValueType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3"
// 		wsu:Id="CertId-1673181727">MIIHab...n71P</wsse:BinarySecurityToken>
//             <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/2001/04/xmldsig-more#rsa-sha256"/>
//                     <ds:Reference URI="#id-1214941501">
//                         <ds:Transforms>
//                             <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
//                         </ds:Transforms>
//                         <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
//                         <ds:DigestValue>abcdefghijkLMNOPQRSTUVwxyz012345Em0o3VEOTck=</ds:DigestValue>
//                     </ds:Reference>
//                     <ds:Reference URI="#id-1871558655">
//                         <ds:Transforms>
//                             <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
//                         </ds:Transforms>
//                         <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
//                         <ds:DigestValue>abcdefghijkLMNOPQRSTUVwxyz012345Xm5ViA+royg=</ds:DigestValue>
//                     </ds:Reference>
//                 </ds:SignedInfo>
//                 <ds:SignatureValue>abcd...5Nbw==</ds:SignatureValue>
//                 <ds:KeyInfo Id="KeyId-256137097">
//                     <wsse:SecurityTokenReference xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="STRId-1862925355">
//                         <wsse:Reference URI="#CertId-1673181727" ValueType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3"/>
//                     </wsse:SecurityTokenReference>
//                 </ds:KeyInfo>
//             </ds:Signature>
//         </wsse:Security>
//         <ns1:MeFHeader xmlns:ns1="http://www.irs.gov/a2a/mef/MeFHeader.xsd" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="id-1214941501">
//             <ns1:MessageID>12345202018200000234</ns1:MessageID>
//             <ns1:Action>Login</ns1:Action>
//             <ns1:MessageTs>2020-06-30T15:25:42.678Z</ns1:MessageTs>
//             <ns1:ETIN>12345</ns1:ETIN>
//             <ns1:SessionKeyCd>Y</ns1:SessionKeyCd>
//             <ns1:TestCd>P</ns1:TestCd>
//             <ns1:AppSysID>65432190</ns1:AppSysID>
//             <ns1:WSDLVersionNum>10.3</ns1:WSDLVersionNum>
//             <ns1:ClientSoftwareTxt>SOATest</ns1:ClientSoftwareTxt>
//         </ns1:MeFHeader>
//     </SOAP-ENV:Header>
//     <SOAP-ENV:Body xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="id-1871558655">
//         <LoginRequest xmlns="http://www.irs.gov/a2a/mef/MeFMSIServices.xsd"/>
//     </SOAP-ENV:Body>
// </SOAP-ENV:Envelope>

// -------------------------------------------------------------------------------------------

// First, let's load the certificate + private key to be used for signing (from a PFX).
// (It is also possible to use certificates installed on a Windows system, or from other file formats..)
pfx := TChilkatPfx.Create(Self);
success := pfx.LoadPfxFile('qa_data/pfx/cert_test123.pfx','test123');
if (success <> 1) then
  begin
    Memo1.Lines.Add(pfx.LastErrorText);
    Exit;
  end;

// We'll be needing the X.509 signing cert as base64 for the BinarySecurityToken, so let's get it now..
// The certificate having the private key should be the 1st in the PFX.
signingCert := pfx.GetCert(0);
if (pfx.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(pfx.LastErrorText);
    Exit;
  end;

bdCert := TChilkatBinData.Create(Self);
signingCert.ExportCertDerBd(bdCert.ControlInterface);
sbCert64 := TChilkatStringBuilder.Create(Self);
bdCert.GetEncodedSb('base64',sbCert64.ControlInterface);

// -------------------------------------------------------------------------------------------
// The XML before signing would look like this:

// <?xml version="1.0" encoding="UTF-8"?>
// <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
//     <SOAP-ENV:Header>
//         <wsse:Security xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">
//             <wsse:BinarySecurityToken 
// 		xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd"
// 		EncodingType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary"
// 		ValueType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3"
// 		wsu:Id="CertId-1673181727">MIIHab...n71P</wsse:BinarySecurityToken>
//         </wsse:Security>
//         <ns1:MeFHeader xmlns:ns1="http://www.irs.gov/a2a/mef/MeFHeader.xsd" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="id-1214941501">
//             <ns1:MessageID>12345202018200000234</ns1:MessageID>
//             <ns1:Action>Login</ns1:Action>
//             <ns1:MessageTs>2020-06-30T15:25:42.678Z</ns1:MessageTs>
//             <ns1:ETIN>12345</ns1:ETIN>
//             <ns1:SessionKeyCd>Y</ns1:SessionKeyCd>
//             <ns1:TestCd>P</ns1:TestCd>
//             <ns1:AppSysID>65432190</ns1:AppSysID>
//             <ns1:WSDLVersionNum>10.3</ns1:WSDLVersionNum>
//             <ns1:ClientSoftwareTxt>SOATest</ns1:ClientSoftwareTxt>
//         </ns1:MeFHeader>
//     </SOAP-ENV:Header>
//     <SOAP-ENV:Body xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="id-1871558655">
//         <LoginRequest xmlns="http://www.irs.gov/a2a/mef/MeFMSIServices.xsd"/>
//     </SOAP-ENV:Body>
// </SOAP-ENV:Envelope>

// You can use the online XML code generation tool at http://tools.chilkat.io/xmlCreate.cshtml
// to generate the following XML creation source code:

// Create the XML to be signed...
xmlToSign := TChilkatXml.Create(Self);
xmlToSign.Tag := 'SOAP-ENV:Envelope';
xmlToSign.AddAttribute('xmlns:SOAP-ENV','http://schemas.xmlsoap.org/soap/envelope/');
xmlToSign.AddAttribute('xmlns:xsd','http://www.w3.org/2001/XMLSchema');
xmlToSign.AddAttribute('xmlns:xsi','http://www.w3.org/2001/XMLSchema-instance');
xmlToSign.UpdateAttrAt('SOAP-ENV:Header|wsse:Security',1,'xmlns:wsse','http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd');
xmlToSign.UpdateAttrAt('SOAP-ENV:Header|wsse:Security|wsse:BinarySecurityToken',1,'xmlns:wsu','http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd');
xmlToSign.UpdateAttrAt('SOAP-ENV:Header|wsse:Security|wsse:BinarySecurityToken',1,'EncodingType','http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary');
xmlToSign.UpdateAttrAt('SOAP-ENV:Header|wsse:Security|wsse:BinarySecurityToken',1,'ValueType','http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3');
xmlToSign.UpdateAttrAt('SOAP-ENV:Header|wsse:Security|wsse:BinarySecurityToken',1,'wsu:Id','CertId-1673181727');
xmlToSign.UpdateChildContent('SOAP-ENV:Header|wsse:Security|wsse:BinarySecurityToken',sbCert64.GetAsString());
xmlToSign.UpdateAttrAt('SOAP-ENV:Header|ns1:MeFHeader',1,'xmlns:ns1','http://www.irs.gov/a2a/mef/MeFHeader.xsd');
xmlToSign.UpdateAttrAt('SOAP-ENV:Header|ns1:MeFHeader',1,'xmlns:wsu','http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd');
xmlToSign.UpdateAttrAt('SOAP-ENV:Header|ns1:MeFHeader',1,'wsu:Id','id-1214941501');
xmlToSign.UpdateChildContent('SOAP-ENV:Header|ns1:MeFHeader|ns1:MessageID','12345202018200000234');
xmlToSign.UpdateChildContent('SOAP-ENV:Header|ns1:MeFHeader|ns1:Action','Login');
xmlToSign.UpdateChildContent('SOAP-ENV:Header|ns1:MeFHeader|ns1:MessageTs','2020-06-30T15:25:42.678Z');
xmlToSign.UpdateChildContentInt('SOAP-ENV:Header|ns1:MeFHeader|ns1:ETIN',12345);
xmlToSign.UpdateChildContent('SOAP-ENV:Header|ns1:MeFHeader|ns1:SessionKeyCd','Y');
xmlToSign.UpdateChildContent('SOAP-ENV:Header|ns1:MeFHeader|ns1:TestCd','P');
xmlToSign.UpdateChildContentInt('SOAP-ENV:Header|ns1:MeFHeader|ns1:AppSysID',65432190);
xmlToSign.UpdateChildContent('SOAP-ENV:Header|ns1:MeFHeader|ns1:WSDLVersionNum','10.3');
xmlToSign.UpdateChildContent('SOAP-ENV:Header|ns1:MeFHeader|ns1:ClientSoftwareTxt','SOATest');
xmlToSign.UpdateAttrAt('SOAP-ENV:Body',1,'xmlns:wsu','http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd');
xmlToSign.UpdateAttrAt('SOAP-ENV:Body',1,'wsu:Id','id-1871558655');
xmlToSign.UpdateAttrAt('SOAP-ENV:Body|LoginRequest',1,'xmlns','http://www.irs.gov/a2a/mef/MeFMSIServices.xsd');

// -------------------------------------------------------------------------------------------
// Setup the XML DSig generator object to create the desired signature.

gen := TChilkatXmlDSigGen.Create(Self);

gen.SigLocation := 'SOAP-ENV:Envelope|SOAP-ENV:Header|wsse:Security';
gen.SigLocationMod := 0;
gen.SigNamespacePrefix := 'ds';
gen.SigNamespaceUri := 'http://www.w3.org/2000/09/xmldsig#';
gen.SignedInfoCanonAlg := 'EXCL_C14N';
gen.SignedInfoDigestMethod := 'sha256';

// Set the KeyInfoId before adding references..
gen.KeyInfoId := 'KeyId-256137097';

// -------- Reference 1 --------
gen.AddSameDocRef('id-1214941501','sha256','EXCL_C14N','','');

// -------- Reference 2 --------
gen.AddSameDocRef('id-1871558655','sha256','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 := 'Custom';

// Create the custom KeyInfo XML..
xmlCustomKeyInfo := TChilkatXml.Create(Self);
xmlCustomKeyInfo.Tag := 'wsse:SecurityTokenReference';
xmlCustomKeyInfo.AddAttribute('xmlns:wsu','http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd');
xmlCustomKeyInfo.AddAttribute('wsu:Id','STRId-1862925355');
xmlCustomKeyInfo.UpdateAttrAt('wsse:Reference',1,'URI','#CertId-1673181727');
xmlCustomKeyInfo.UpdateAttrAt('wsse:Reference',1,'ValueType','http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3');

xmlCustomKeyInfo.EmitXmlDecl := 0;
gen.CustomKeyInfoXml := xmlCustomKeyInfo.GetXml();

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

// Update BinarySecurityToken_Base64Binary_Content with the actual X509 of the signing cert.
nReplaced := sbXml.Replace('BinarySecurityToken_Base64Binary_Content',cert.GetEncoded());

gen.Behaviors := 'IndentedSignature';

// 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('c:/temp/qa_output/signedXml.xml','utf-8',0);

Memo1.Lines.Add(sbXml.GetAsString());
end;
 

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