Pascal (Lazarus/Delphi)

Generate an Ed25519 Key Pair

See more Ed25519 Examples

Demonstrates how to generate a new Ed25519 public/private key pair.

Note: This example requires Chilkat v9.5.0.83 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.EdDSA,
  Chilkat.Prng,
  Chilkat.JsonObject,
  Chilkat.PrivateKey;

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

procedure RunDemo;
var
  success: Boolean;
  eddsa: TEdDSA;
  prng: TPrng;
  privKey: TPrivateKey;
  jwk: string;
  json: TJsonObject;

begin
  success := False;

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

  eddsa := TEdDSA.Create;
  prng := TPrng.Create;
  privKey := TPrivateKey.Create;

  //  Generates a new eddsa key and stores it in privKey.
  success := eddsa.GenEd25519Key(prng,privKey);
  if (success = False) then
    begin
      WriteLn(eddsa.LastErrorText);
      Exit;
    end;

  //  Examine the ed25519 key in JWK format;
  jwk := privKey.GetJwk();

  json := TJsonObject.Create;
  json.Load(jwk);
  json.EmitCompact := False;
  WriteLn(json.Emit());

  //  Sample output:
  //  {
  //    "kty": "OKP",
  //    "crv": "Ed25519",
  //    "x": "SE2Kne5xt51z1eciMH2T2ftDQp96Gl6FhY6zSQujiP0",
  //    "d": "O-eRXewadF0sNyB0U9omcnt8Qg2ZmeK3WSXPYgqe570",
  //    "use": "sig"
  //  }

  //  In the above JWK, x is the public key, y is the private key.
  //  Both are 32 bytes and are base64-url encoded.


  eddsa.Free;
  prng.Free;
  privKey.Free;
  json.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.