Pascal (Lazarus/Delphi)

Verify SOAP XML using a wsse:SecurityTokenReference

See more XML Digital Signatures Examples

This example verifies a SOAP XML Digital Signature where the KeyInfo in the XML Signature is a wsse:SecurityTokenReference to the X.509 certificate embedded elsewhere in the SOAP XML. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Http,
  Chilkat.StringBuilder,
  Chilkat.XmlDSig;

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

procedure RunDemo;
var
  success: Boolean;
  signedSoapXmlUrl: string;
  http: THttp;
  sbXml: TStringBuilder;
  verifier: TXmlDSig;
  bVerified: Boolean;

begin
  success := False;

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

  //  The SOAP XML with digital signature verified in this example is available at 
  //  https://www.chilkatsoft.com/exampleData/signedSoapBinarySecurityToken.xml

  signedSoapXmlUrl := 'https://www.chilkatsoft.com/exampleData/signedSoapBinarySecurityToken.xml';

  //  First, let's get the signed SOAP XML..
  http := THttp.Create;
  sbXml := TStringBuilder.Create;
  success := http.QuickGetSb(signedSoapXmlUrl,sbXml);
  if (success <> True) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  //  The signed XML downloaded from the above URL contains the following.
  //  Note: Everything we need to verify the signature is already available within the signed XML.
  //  The KeyInfo part of the Signature contains a reference to the wsse:BinarySecurityToken
  //  For clarity, here is the KeyInfo section extracted from the Signature below:
  //  
  //  <ds:KeyInfo><wsse:SecurityTokenReference><wsse:Reference URI="#x509cert00" ValueType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509" /></wsse:SecurityTokenReference></ds:KeyInfo>
  //  
  //  Chilkat has the capability to automatically follow the SecurityTokenReference.  It will automatically locate the 
  //  certificate contained in the wsse:BinarySecurityToken element (in this case identified by Id="x509cert00"), 
  //  automatically extracts the public key from the base64 X.509 certificate, and uses it to verify the signature.

  //  <?xml version="1.0" encoding="UTF8"?>
  //  <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
  //  <SOAP-ENV:Header>
  //   <wsse:Security xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
  //                  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"
  //                  xmlns:xenc="http://www.w3.org/2001/04/xmlenc#" SOAP-ENV:mustUnderstand="1">
  //   <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#X509"
  //                 wsu:Id="x509cert00">MIIDg...</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#"><InclusiveNamespaces xmlns="http://www.w3.org/2001/10/xml-exc-c14n#" PrefixList="wsse SOAP-ENV"/></ds:CanonicalizationMethod><ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/><ds:Reference URI="#TheBody"><ds:Transforms><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>VhsSnaEAFsY0OYegKQh99v9csXg=</ds:DigestValue></ds:Reference></ds:SignedInfo><ds:SignatureValue>Ynp3H4rtzpXIh4TaVxkpEkS1bMCCu672aeCzUOzheNNfnpmLsCZz3+zQjMBbchPggCayC5ihpEdhRe3XvPXjPXXAgxDP4mic091QPmjHlmUcu8yqRKfxnPtD35nqaxDtCYw+jGIzj+ch094vA4RPCfY8JQnb1mpy1ZjjsMW8741CIh1epbsd/0bZt6tfINUQ37seg07yvLbCJZ/Zf+h8FlFryQk6lHTTeZl/GfQ9NlDBcShby3x8Hc1KwW++zFqEA7G783R9AYPYn3fWTOBhYk5gkgFc+HaPRLR/L0Bp7ZPbmOR/iZQ+HK4W672tTdN/R2GdN7/deV7QTp2DYK1Z8w==</ds:SignatureValue><ds:KeyInfo><wsse:SecurityTokenReference><wsse:Reference URI="#x509cert00" ValueType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509" /></wsse:SecurityTokenReference></ds:KeyInfo></ds:Signature></wsse:Security>
  //  </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="TheBody">
  //   <getVersion xmlns="http://msgsec.wssecfvt.ws.ibm.com"/>
  //  </SOAP-ENV:Body>
  //  </SOAP-ENV:Envelope>
  //  

  //  To verify this signature, we simply load and verify:
  verifier := TXmlDSig.Create;
  success := verifier.LoadSignatureSb(sbXml);
  if (success <> True) then
    begin
      WriteLn(verifier.LastErrorText);
      Exit;
    end;

  bVerified := verifier.VerifySignature(True);
  if (bVerified <> True) then
    begin
      WriteLn(verifier.LastErrorText);
      Exit;
    end;

  WriteLn('Signature verified!');


  http.Free;
  sbXml.Free;
  verifier.Free;

end;

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

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.