(Delphi ActiveX) Create Signed SOAP XML for DIAN Colombia WCF Service

Demonstrates how to create a signed SOAP XML document for DIAN Colombia.

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;
xmlCustomKeyInfo: TChilkatXml;
sbXml: TChilkatStringBuilder;
bdCert: TChilkatBinData;
nReplaced: Integer;
verifier: TChilkatXmlDSig;
numSigs: Integer;
verifyIdx: Integer;
verified: Integer;

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

// This example will produce a signed SOAP XML message that looks like this:

// <?xml version="1.0" encoding="utf-8"?>
// <soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:wcf="http://wcf.dian.colombia">
//     <soap:Header xmlns:wsa="http://www.w3.org/2005/08/addressing">
//         <wsse:Security xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">
//             <wsu:Timestamp wsu:Id="TS-F25839120CBA3ECDAD68754D0443A667636FDA68">
//                 <wsu:Created>2019-08-23T23:03:01Z</wsu:Created>
//                 <wsu:Expires>2019-08-24T15:43:01Z</wsu:Expires>
//             </wsu:Timestamp>
//             <wsse:BinarySecurityToken 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="ABCXYZ-9F0F7E15A59816E680B4735080A789DC1EED6C9C">MIIG8jCCBd ... zLjGQUB6lcz</wsse:BinarySecurityToken>
//             <ds:Signature Id="SIG-F25839120CBA3ECDAD68754D0443A667636FDA68" xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
//                 <ds:SignedInfo>
//                     <ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#">
//                         <ec:InclusiveNamespaces PrefixList="wsa soap wcf" xmlns:ec="http://www.w3.org/2001/10/xml-exc-c14n#"/>
//                     </ds:CanonicalizationMethod>
//                     <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/>
//                     <ds:Reference URI="#ID-F25839120CBA3ECDAD68754D0443A667636FDA68">
//                         <ds:Transforms>
//                             <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#">
//                                 <ec:InclusiveNamespaces PrefixList="soap wcf" xmlns:ec="http://www.w3.org/2001/10/xml-exc-c14n#"/>
//                             </ds:Transform>
//                         </ds:Transforms>
//                         <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
//                         <ds:DigestValue>gSIKtjS/BKA2bgecXkM8lYVBDqlXcU3juNYT9a+bSnM=</ds:DigestValue>
//                     </ds:Reference>
//                 </ds:SignedInfo>
//                 <ds:SignatureValue>sL7rOdyfkEnKgJja0eWrv ... YqG0T0pflBsGW9zXkjQ9NvAw==</ds:SignatureValue>
//                 <ds:KeyInfo Id="KI-F25839120CBA3ECDAD68754D0443A667636FDA68">
//                     <wsse:SecurityTokenReference wsu:Id="STR-F25839120CBA3ECDAD68754D0443A667636FDA68">
//                         <wsse:Reference URI="#ABCXYZ-9F0F7E15A59816E680B4735080A789DC1EED6C9C" 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>
//         <wsa:Action>http://wcf.dian.colombia/IWcfDianCustomerServices/GetStatus</wsa:Action>
//         <wsa:To wsu:Id="ID-F25839120CBA3ECDAD68754D0443A667636FDA68" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">https://vpfe-hab.dian.gov.co/WcfDianCustomerServices.svc</wsa:To>
//     </soap:Header>
//     <soap:Body>
//         <wcf:GetStatus>
//             <wcf:trackId>123456666</wcf:trackId>
//         </wcf:GetStatus>
//     </soap:Body>
// </soap:Envelope>

// Use this online tool to generate code from sample Signed XML: 
// Generate Code to Create Signed XML

success := 1;
// Create the XML to be signed...
xmlToSign := TChilkatXml.Create(Self);
xmlToSign.Tag := 'soap:Envelope';
xmlToSign.AddAttribute('xmlns:soap','http://www.w3.org/2003/05/soap-envelope');
xmlToSign.AddAttribute('xmlns:wcf','http://wcf.dian.colombia');
xmlToSign.UpdateAttrAt('soap:Header',1,'xmlns:wsa','http://www.w3.org/2005/08/addressing');
xmlToSign.UpdateAttrAt('soap: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:Header|wsse:Security',1,'xmlns:wsu','http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd');
xmlToSign.UpdateAttrAt('soap:Header|wsse:Security|wsu:Timestamp',1,'wsu:Id','TS-F25839120CBA3ECDAD68754D0443A667636FDA68');
xmlToSign.UpdateChildContent('soap:Header|wsse:Security|wsu:Timestamp|wsu:Created','2019-08-23T23:03:01Z');
xmlToSign.UpdateChildContent('soap:Header|wsse:Security|wsu:Timestamp|wsu:Expires','2019-08-24T15:43:01Z');
xmlToSign.UpdateAttrAt('soap: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: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:Header|wsse:Security|wsse:BinarySecurityToken',1,'wsu:Id','ABCXYZ-9F0F7E15A59816E680B4735080A789DC1EED6C9C');
xmlToSign.UpdateChildContent('soap:Header|wsse:Security|wsse:BinarySecurityToken','BinarySecurityToken_Base64Binary_Content');
xmlToSign.UpdateChildContent('soap:Header|wsa:Action','http://wcf.dian.colombia/IWcfDianCustomerServices/GetStatus');
xmlToSign.UpdateAttrAt('soap:Header|wsa:To',1,'wsu:Id','ID-F25839120CBA3ECDAD68754D0443A667636FDA68');
xmlToSign.UpdateAttrAt('soap:Header|wsa:To',1,'xmlns:wsu','http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd');
xmlToSign.UpdateChildContent('soap:Header|wsa:To','https://vpfe-hab.dian.gov.co/WcfDianCustomerServices.svc');
xmlToSign.UpdateChildContent('soap:Body|wcf:GetStatus|wcf:trackId','123456666');

gen := TChilkatXmlDSigGen.Create(Self);

gen.SigLocation := 'soap:Envelope|soap:Header|wsse:Security';
gen.SigLocationMod := 0;
gen.SigId := 'SIG-F25839120CBA3ECDAD68754D0443A667636FDA68';
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 := 'KI-F25839120CBA3ECDAD68754D0443A667636FDA68';

// -------- Reference 1 --------
gen.AddSameDocRef('ID-F25839120CBA3ECDAD68754D0443A667636FDA68','sha256','EXCL_C14N','soap wcf','');

// 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('wsu:Id','STR-F25839120CBA3ECDAD68754D0443A667636FDA68');
xmlCustomKeyInfo.UpdateAttrAt('wsse:Reference',1,'URI','#ABCXYZ-9F0F7E15A59816E680B4735080A789DC1EED6C9C');
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.
bdCert := TChilkatBinData.Create(Self);
cert.ExportCertDerBd(bdCert.ControlInterface);

nReplaced := sbXml.Replace('BinarySecurityToken_Base64Binary_Content',bdCert.GetEncoded('base64'));

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

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

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

numSigs := verifier.NumSignatures;
verifyIdx := 0;
while verifyIdx < numSigs do
  begin
    verifier.Selector := verifyIdx;
    verified := verifier.VerifySignature(1);
    if (verified <> 1) then
      begin
        Memo1.Lines.Add(verifier.LastErrorText);
        Exit;
      end;
    verifyIdx := verifyIdx + 1;
  end;

Memo1.Lines.Add('All signatures were successfully verified.');

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