Pascal (Lazarus/Delphi)

Windows Credentials Manager - AutoSplit Larger Secrets

See more Secrets Examples

Secrets stored in the Windows Credentials Manager can be a maximum of 2560 bytes in size. If the content of the secret is too large for the Windows Credential Manager, Chilkat will automatically split the secret into parts and store a shorter JSON manifest.

Note: This example requires Chilkat v10.1.0 or later.

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.Secrets,
  Chilkat.JsonObject;

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

procedure RunDemo;
var
  success: Boolean;
  secrets: TSecrets;
  json: TJsonObject;
  jsonSecret: TJsonObject;

begin
  success := False;

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

  secrets := TSecrets.Create;

  //  The default value of AutoSplit is True.
  //  Note: AutoSplit only applies when the secret location is "local_manager"
  //  and the app is running on the Windows OS.  All other secret locations, such as Apple Keychain,
  //  AWS Secrets Manager, Azure Key Vault, etc. don't have limitations that are so small.
  secrets.AutoSplit := True;

  //  On Windows, this is the Windows Credentials Manager
  //  On MacOS/iOS, it is the Apple Keychain
  //  (This example is explaining how a secret too large for the Windows Credential Manager
  //  is automatically compressed and split into parts if needed.)
  secrets.Location := 'local_manager';

  //  Specify the name of the secret.
  //  service and username are required.
  //  appName and domain are optional.
  //  Note: The values are arbitrary and can be anything you want.
  json := TJsonObject.Create;
  json.UpdateString('appName','AA_MyApp');
  json.UpdateString('service','OAuth2');
  json.UpdateString('domain','onedrive');
  json.UpdateString('username','matt');

  //  Get the secret to be stored.
  jsonSecret := TJsonObject.Create;
  success := jsonSecret.LoadFile('qa_data/tokens/oneDrive.json');
  if (success = False) then
    begin
      WriteLn(jsonSecret.LastErrorText);
      Exit;
    end;

  //  Note: The oneDrive.json file we used for testing is 4824 bytes in size,
  //  which exceeds the maximum size (2560 bytes) allowed by the Windows Credentials Manager.

  //  When the size is too large, Chilkat will first compress the content of the secret.
  //  If the compressed size is small enough, then it is stored compressed without splitting.
  //  Otherwise the compressed data is split

  //  Your application does not need to know how the secret is stored in the Windows Credentials Manager.
  //  When fetching the secret, Chilkat automatically decompresses and re-composes from parts.

  //  Create or update the secret.
  success := secrets.UpdateSecretJson(json,jsonSecret);
  if (success = False) then
    begin
      WriteLn(secrets.LastErrorText);
      Exit;
    end;

  //  This is the auto-split secret viewed in the Windows Credentials Manager:
  //  

  //  Note: If you delete the auto-split secret by calling Chilkat's DeleteSecret method,
  //  the parts are automatically deleted.
  //  Also, if you update the secret, the old parts are automatically deleted and new parts are created.

  WriteLn('Success');


  secrets.Free;
  json.Free;
  jsonSecret.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.