Lazarus Pascal

Get Certificate Subject Part by Name or OID

Demonstrates the GetSubjectPart method where a name or OID can be passed. Lazarus Pascal

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;

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

procedure RunDemo;
var
  success: Boolean;
  cert: TCert;
  serialNum: string;

begin
  success := False;

  cert := TCert.Create;

  success := cert.LoadByCommonName('myCert');
  if (success = False) then
    begin
      WriteLn(cert.LastErrorText);
      Exit;
    end;

  //  This example demonstrates getting the SERIALNUMBER part of the subject,
  //  if one such part exists in the cert's subject.
  //  Not too many certicates include the serial number in the Subject.
  //  (Chilean issued certificates for SII is one such case where the SERIALNUMBER part exists within the Subject.)
  serialNum := cert.GetSubjectPart('SERIALNUMBER');
  if (cert.LastMethodSuccess = False) then
    begin
      WriteLn('No SERIALNUMBER part exists.');
      Exit;
    end;

  WriteLn(serialNum);

  //  We could also get the part by the OID.
  //  See https://oidref.com/2.5.4.5 for a list of OID's in the 2.5.4.* range..
  //  The OID for SERIALNUMBER is "2.5.4.5"
  serialNum := cert.GetSubjectPart('2.5.4.5');
  if (cert.LastMethodSuccess = False) then
    begin
      WriteLn('No SERIALNUMBER part exists.');
      Exit;
    end;

  WriteLn(serialNum);


  cert.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.