Delphi DLL

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.

Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, PrivateKey, Jwt, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
privKey: HCkPrivateKey;
jwt: HCkJwt;
jose: HCkJsonObject;
claims: HCkJsonObject;
curDateTime: Integer;
token: PWideChar;

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 := CkPrivateKey_Create();

// Load an Ed25519 (EdDSA) private key from a PEM file.
success := CkPrivateKey_LoadPemFile(privKey,'qa_data/eddsa/ed25519.pem');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkPrivateKey__lastErrorText(privKey));
    Exit;
  end;

jwt := CkJwt_Create();

// Build the JOSE header
jose := CkJsonObject_Create();

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

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

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

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

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

// Produce the smallest possible JWT:
CkJwt_putAutoCompact(jwt,True);

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

Memo1.Lines.Add(token);

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

CkPrivateKey_Dispose(privKey);
CkJwt_Dispose(jwt);
CkJsonObject_Dispose(jose);
CkJsonObject_Dispose(claims);

end;