(Delphi ActiveX) secp256k1 Key Generation and Keccak-256

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Note: This example requires Chilkat v11.0.0 or greater.

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

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
fortuna: TChilkatPrng;
entropy: WideString;
success: Integer;
ecc: TChilkatEcc;
privKey: IPrivateKey;
sb: TChilkatStringBuilder;
bd: TChilkatBinData;

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 ECDSA private key.
fortuna := TChilkatPrng.Create(Self);
entropy := fortuna.GetEntropy(32,'base64');
success := fortuna.AddEntropy(entropy,'base64');

ecc := TChilkatEcc.Create(Self);

// Generate a random ECDSA private key on the secp256k1 curve.
privKey := ecc.GenEccKey('secp256k1',fortuna.ControlInterface);
if (ecc.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(ecc.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add('Successfully generated a sec256k1 key.');

// Show how to compute the Keccak-256 hash in a few ways.
sb := TChilkatStringBuilder.Create(Self);
sb.Append('hello');

Memo1.Lines.Add('keccak-256: ' + sb.GetHash('keccak-256','hex_lower','utf-8'));

// Output:
// keccak-256: 1c8aff950685c2ed4bc3174f3472287b56d9517b9c948127319a09a7a36deac8

// To keccak-256 hash binary data
bd := TChilkatBinData.Create(Self);
bd.AppendEncoded('00010203040506','hex');

Memo1.Lines.Add('keccak-256: ' + bd.GetHash('keccak-256','hex_lower'));

// Output:
// keccak-256: 801560412425120fa609be232d6fa71c7f64f42aee7977267687dcc0a2f5aa63
end;