Pascal (Lazarus/Delphi)

Create JWT Using Ed25519 Private Key (EdDSA)

See more JSON Web Token (JWT) Examples

Demonstrates how to create a JWT using an Ed25519 private key. If the private key is Ed25519, which is an EdDSA algorithm, the JOSE header's "alg" member should be set to "EdDSA".

Note: This example requires Chilkat v9.5.0.95 or greater.

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.Jwt,
  Chilkat.JsonObject;

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

procedure RunDemo;
var
  success: Boolean;
  privKey: TPrivateKey;
  jwt: TJwt;
  jose: TJsonObject;
  claims: TJsonObject;
  curDateTime: Integer;
  token: string;

begin
  success := False;

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

  //  Demonstrates how to create a JWT using an Ed25519 private key.

  privKey := TPrivateKey.Create;

  //  Load an Ed25519 (EdDSA) private key from a PEM file.
  success := privKey.LoadPemFile('qa_data/eddsa/ed25519.pem');
  if (success <> True) then
    begin
      WriteLn(privKey.LastErrorText);
      Exit;
    end;

  jwt := TJwt.Create;

  //  Build the JOSE header
  jose := TJsonObject.Create;

  //  -----------------------------------------------------------------
  //  Note: This example requires Chilkat v9.5.0.95 or greater.
  //  -----------------------------------------------------------------
  success := jose.AppendString('alg','EdDSA');
  success := jose.AppendString('typ','JWT');

  //  Now build the JWT claims (also known as the payload)
  claims := TJsonObject.Create;
  success := claims.AppendString('iss','http://example.org');
  success := claims.AppendString('sub','John');
  success := claims.AppendString('aud','http://example.com');

  //  (optional) Set the timestamp of when the JWT was created to now.
  curDateTime := jwt.GenNumericDate(0);
  success := claims.AddIntAt(-1,'iat',curDateTime);

  //  (optional)  Set the "not process before" timestamp to now.
  success := claims.AddIntAt(-1,'nbf',curDateTime);

  //  (optional)  Set the timestamp defining an expiration time (end time) for the token
  //  to be now + 1 hour (3600 seconds)
  success := claims.AddIntAt(-1,'exp',curDateTime + 3600);

  //  Produce the smallest possible JWT:
  jwt.AutoCompact := True;

  //  Create the JWT token.
  token := jwt.CreateJwtPk(jose.Emit(),claims.Emit(),privKey);

  WriteLn(token);

  //  Example output:
  //  eyJhbGciOiJFZERTQSIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJodHRwOi8vZXhhbXBsZS5vcmciLCJzdWIiOiJKb2huIiwiYXVkIjoiaHR0cDovL2V4YW1wbGUuY29tIiwiaWF0IjoxNjg3OTcwNjgyLCJuYmYiOjE2ODc5NzA2ODIsImV4cCI6MTY4Nzk3NDI4Mn0.eyfrDJfuWJSJVJPfAUYb_p_c-LF_YULHGRaZx82MLLjMLCCFEEGckp8icuayf5bLW9ah20LzYYt0JgOBIB0RDg


  privKey.Free;
  jwt.Free;
  jose.Free;
  claims.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.