Delphi ActiveX

PBKDF2 Key Derivation

Demonstrates AES secret key derivation from a password using PBDKF2. Delphi ActiveX

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
crypt: TChilkatCrypt2;
password: WideString;
charset: WideString;
hashAlg: WideString;
saltHex: WideString;
iterationCount: Integer;
outputBitLen: Integer;
enc: WideString;
hexKey: WideString;

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

crypt := TChilkatCrypt2.Create(Self);

password := 'correcthorsebatterystaple';

// Derive from the utf-8 byte representation of the password.
charset := 'utf-8';

hashAlg := 'sha256';

crypt.EncodingMode := 'hex';
saltHex := crypt.GenRandomBytesENC(16);

iterationCount := 310000;

// Derive a 256-bit key from the password.
outputBitLen := 256;

// The derived key is returned as a hex or base64 encoded string.
// (Note: The salt argument must be a string that also uses
// the same encoding.)
enc := 'hex';

hexKey := crypt.Pbkdf2(password,charset,hashAlg,saltHex,iterationCount,outputBitLen,enc);

Memo1.Lines.Add(hexKey);

// Sample output:
// 597734C894FF89CFD3B93D925462C24E97724BCB118F6FC919007F5ABC27E768
end;