Pascal (Lazarus/Delphi)

Iterate Keys and Certs in PEM

See more PEM Examples

Demonstrates how to access each of the private keys and certs contained within a PEM. 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.PrivateKey,
  Chilkat.Cert,
  Chilkat.Pem;

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

procedure RunDemo;
var
  success: Boolean;
  pem: TPem;
  password: string;
  pemContent: string;
  numPrivateKeys: Integer;
  i: Integer;
  privKey: TPrivateKey;
  cert: TCert;
  numCerts: Integer;

begin
  success := False;

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

  pem := TPem.Create;

  //  Load the PEM from a file.
  //  If the PEM is encrypted, provide a password.  Otherwise pass an empty string for the password.
  password := 'myPassword';
  success := pem.LoadPemFile('../myPemFiles/myPem.pem',password);
  if (success = False) then
    begin
      WriteLn(pem.LastErrorText);
      Exit;
    end;

  //  Note: If the app already has the PEM pre-loaded in a string variable, then load it 
  //  by calling LoadPem instead.  
  pemContent := '... the PEM contents ...';
  success := pem.LoadPem(pemContent,password);
  //  Check for success as before..

  //  Iterate over the private keys.
  numPrivateKeys := pem.NumPrivateKeys;
  i := 0;

  privKey := TPrivateKey.Create;
  while i < numPrivateKeys do
    begin
      pem.PrivateKeyAt(i,privKey);
      WriteLn('Private Key ' + i + ' is ' + privKey.BitLength + ' in length');
      i := i + 1;
    end;

  //  Iterate over the certificates.
  cert := TCert.Create;
  numCerts := pem.NumCerts;
  i := 0;
  while i < numCerts do
    begin
      pem.CertAt(i,cert);
      WriteLn('Certificate ' + i + ' : ' + cert.SubjectDN);
      i := i + 1;
    end;



  pem.Free;
  privKey.Free;
  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.