Delphi DLL

secp256k1 Key Generation and Keccak-256

See more ECC Examples

Starting in v11.0.0, Chilkat supports both secp256k1 key generation and Keccak-256 directly. These algorithms are typically used for Bitcoin and Ethereum. Delphi DLL

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

...

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

begin
success := False;

// 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 := CkPrng_Create();
entropy := CkPrng__getEntropy(fortuna,32,'base64');
success := CkPrng_AddEntropy(fortuna,entropy,'base64');

ecc := CkEcc_Create();

// Generate a random ECDSA private key on the secp256k1 curve.
privKey := CkPrivateKey_Create();
success := CkEcc_GenKey(ecc,'secp256k1',fortuna,privKey);
if (success = False) then
  begin
    Memo1.Lines.Add(CkEcc__lastErrorText(ecc));
    Exit;
  end;

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

// Show how to compute the Keccak-256 hash in a few ways.
sb := CkStringBuilder_Create();
CkStringBuilder_Append(sb,'hello');

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

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

// To keccak-256 hash binary data
bd := CkBinData_Create();
CkBinData_AppendEncoded(bd,'00010203040506','hex');

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

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

CkPrng_Dispose(fortuna);
CkEcc_Dispose(ecc);
CkPrivateKey_Dispose(privKey);
CkStringBuilder_Dispose(sb);
CkBinData_Dispose(bd);

end;