(Delphi DLL) Generate Brainpool EC Keys (BP256R1, BP384R1, BP512R1, ...)

Demonstrates how to generate brainpool EC keys.

The brainpool elliptic curve (EC) is a set of standardized elliptic curves defined for use in cryptographic applications. These curves are defined over finite fields and are widely used for implementing elliptic curve cryptography (ECC) algorithms.

The brainpool curves were developed by the brainpool project, a collaborative effort initiated by the German Federal Office for Information Security (BSI) to define standardized elliptic curves with well-established security properties.

Note: Requires Chilkat v9.5.0.98 or later.

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
fortuna: HCkPrng;
entropy: PWideChar;
success: Boolean;
ecc: HCkEcc;
privKey: HCkPrivateKey;

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

// Create a Fortuna PRNG and seed it with system entropy.
// This will be our source of random data for generating the brainpool EC private key.
fortuna := CkPrng_Create();
entropy := CkPrng__getEntropy(fortuna,32,'base64');
success := CkPrng_AddEntropy(fortuna,entropy,'base64');

ecc := CkEcc_Create();

// You can generate keys using any of the following brainpool EC curves:
// (case does not matter)  
// BP160R1
// BP192R1
// BP224R1
// BP256R1
// BP320R1
// BP384R1
// BP512R1

privKey := CkEcc_GenEccKey(ecc,'bp256r1',fortuna);
if (CkEcc_getLastMethodSuccess(ecc) <> True) then
  begin
    Memo1.Lines.Add(CkEcc__lastErrorText(ecc));
    Exit;
  end;

Memo1.Lines.Add(CkPrivateKey__getXml(privKey));

// Save the private key to PKCS8 encrypted PEM
// (The private key can be saved in a variety of different formats. See the online reference documentation.)
success := CkPrivateKey_SavePkcs8EncryptedPemFile(privKey,'pemPassword','c:/temp/qa_output/eccKey123.pem');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkPrivateKey__lastErrorText(privKey));
  end;

CkPrivateKey_Dispose(privKey);

privKey := CkEcc_GenEccKey(ecc,'bp160r1',fortuna);
if (CkEcc_getLastMethodSuccess(ecc) <> True) then
  begin
    Memo1.Lines.Add(CkEcc__lastErrorText(ecc));
    Exit;
  end;
Memo1.Lines.Add(CkPrivateKey__getXml(privKey));
CkPrivateKey_Dispose(privKey);

privKey := CkEcc_GenEccKey(ecc,'bp192r1',fortuna);
if (CkEcc_getLastMethodSuccess(ecc) <> True) then
  begin
    Memo1.Lines.Add(CkEcc__lastErrorText(ecc));
    Exit;
  end;
Memo1.Lines.Add(CkPrivateKey__getXml(privKey));
CkPrivateKey_Dispose(privKey);

privKey := CkEcc_GenEccKey(ecc,'bp224r1',fortuna);
if (CkEcc_getLastMethodSuccess(ecc) <> True) then
  begin
    Memo1.Lines.Add(CkEcc__lastErrorText(ecc));
    Exit;
  end;
Memo1.Lines.Add(CkPrivateKey__getXml(privKey));
CkPrivateKey_Dispose(privKey);

privKey := CkEcc_GenEccKey(ecc,'bp320r1',fortuna);
if (CkEcc_getLastMethodSuccess(ecc) <> True) then
  begin
    Memo1.Lines.Add(CkEcc__lastErrorText(ecc));
    Exit;
  end;
Memo1.Lines.Add(CkPrivateKey__getXml(privKey));
CkPrivateKey_Dispose(privKey);

privKey := CkEcc_GenEccKey(ecc,'bp384r1',fortuna);
if (CkEcc_getLastMethodSuccess(ecc) <> True) then
  begin
    Memo1.Lines.Add(CkEcc__lastErrorText(ecc));
    Exit;
  end;
Memo1.Lines.Add(CkPrivateKey__getXml(privKey));
CkPrivateKey_Dispose(privKey);

privKey := CkEcc_GenEccKey(ecc,'bp512r1',fortuna);
if (CkEcc_getLastMethodSuccess(ecc) <> True) then
  begin
    Memo1.Lines.Add(CkEcc__lastErrorText(ecc));
    Exit;
  end;
Memo1.Lines.Add(CkPrivateKey__getXml(privKey));
CkPrivateKey_Dispose(privKey);

Memo1.Lines.Add('Finished generating Brainpool EC keys.');

CkPrng_Dispose(fortuna);
CkEcc_Dispose(ecc);

end;