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Create Signed SOAP XML for DIAN Colombia WCF Service

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

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Dart
import 'package:chilkat/chilkat.dart';

void main() {
  // 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

  // Create the XML to be signed...
  final xmlToSign = CkXml();
  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', true, 'xmlns:wsa', 'http://www.w3.org/2005/08/addressing');
  xmlToSign.updateAttrAt('soap:Header|wsse:Security', true, 'xmlns:wsse', 'http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd');
  xmlToSign.updateAttrAt('soap:Header|wsse:Security', true, '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', true, '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', true, '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', true, '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', true, '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', true, 'wsu:Id', 'ID-F25839120CBA3ECDAD68754D0443A667636FDA68');
  xmlToSign.updateAttrAt('soap:Header|wsa:To', true, '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');

  final gen = CkXmlDSigGen();

  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)
  final cert = CkCert();
  try {
    cert.loadPfxFile('qa_data/pfx/cert_test123.pfx', 'test123');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  gen.setX509Cert(cert, true);

  gen.keyInfoType = 'Custom';

  // Create the custom KeyInfo XML..
  final xmlCustomKeyInfo = CkXml();
  xmlCustomKeyInfo.tag = 'wsse:SecurityTokenReference';
  xmlCustomKeyInfo.addAttribute('wsu:Id', 'STR-F25839120CBA3ECDAD68754D0443A667636FDA68');
  xmlCustomKeyInfo.updateAttrAt('wsse:Reference', true, 'URI', '#ABCXYZ-9F0F7E15A59816E680B4735080A789DC1EED6C9C');
  xmlCustomKeyInfo.updateAttrAt('wsse:Reference', true, 'ValueType', 'http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3');

  xmlCustomKeyInfo.emitXmlDecl = false;
  gen.customKeyInfoXml = xmlCustomKeyInfo.getXml();

  // Load XML to be signed...
  final sbXml = CkStringBuilder();
  xmlToSign.getXmlSb(sbXml);

  // Update BinarySecurityToken_Base64Binary_Content with the actual X509 of the signing cert.
  final bdCert = CkBinData();
  cert.exportCertDerBd(bdCert);

  final nReplaced = sbXml.replace('BinarySecurityToken_Base64Binary_Content', bdCert.getEncoded('base64'));

  gen.behaviors = 'IndentedSignature';

  // Sign the XML...
  try {
    gen.createXmlDSigSb(sbXml);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

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

  // Save the signed XML to a file.
  sbXml.writeFile('qa_output/signedXml.xml', 'utf-8', false);

  print(sbXml.getAsString());

  // ----------------------------------------
  // Verify the signatures we just produced...
  final verifier = CkXmlDSig();
  try {
    verifier.loadSignatureSb(sbXml);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final numSigs = verifier.numSignatures;
  var verifyIdx = 0;
  while (verifyIdx < numSigs) {
    verifier.selector = verifyIdx;
    try {
      verifier.verifySignature(true);
    } on ChilkatException catch (e) {
      print(e.lastErrorText);
      return;
    }

    verifyIdx++;
  }

  print('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.
  // --------------------------------------------------------------------------------
}