Pascal (Lazarus/Delphi)

Get Certificate User Principal Name (UPN)

See more Certificates Examples

Demonstrates how to get a certificate's UPN from the SAN (Subject Alternative Name). Most certificates do not have a UPN. This example only applies to those certificates that have a User Principal Name.

Note: This example requires Chilkat v9.5.0.90 or greater due to fixes made in getting the UPN from the SAN.

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.Cert,
  Chilkat.Xml;

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

procedure RunDemo;
var
  success: Boolean;
  cert: TCert;
  xml: TXml;
  upn: string;

begin
  success := False;

  cert := TCert.Create;

  success := cert.LoadFromFile('qa_data/certs/sample.cer');
  if (success = False) then
    begin
      WriteLn(cert.LastErrorText);
      Exit;
    end;

  xml := TXml.Create;
  xml.LoadXml(cert.SubjectAlternativeName);
  WriteLn(xml.GetXml());

  //  A certificate with a User Principal Name in the SAN might have this:

  //  <SubjectAltName>
  //      <rfc822Name>joe@example.com</rfc822Name>
  //      <name type="oid" oid="1.3.6.1.4.1.311.20.2.3">joe@example.com</name>
  //  </SubjectAltName>

  //  The OID 1.3.6.1.4.1.311.20.2.3 is for the User Principal Name.
  upn := xml.ChilkatPath('/A/name,oid,1.3.6.1.4.1.311.20.2.3|*');
  if (xml.LastMethodSuccess = False) then
    begin
      WriteLn('No user principle name.');
    end
  else
    begin
      WriteLn('User Principle Name = ' + upn);
    end;


  cert.Free;
  xml.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.