(Delphi ActiveX) PBKDF2 - Derive Key from Password

Demonstrates how to derive a symmetric encryption key from a password using PBKDF2.

For more information, see https://www.chilkatsoft.com/key_derivation_pbkdf2.asp

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
crypt: TChilkatCrypt2;
pw: WideString;
pwCharset: 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);

pw := 'password';

pwCharset := 'utf-8';

// Such as sha256, sha512
hashAlg := 'sha256';

// 16 bytes
saltHex := '78578E5A5D63CB0668AB39B21C8637FA';

iterationCount := 100000;

// 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(pw,pwCharset,hashAlg,saltHex,iterationCount,outputBitLen,enc);

Memo1.Lines.Add(hexKey);

// Sample output:
// AE96E261E32792D0FD6F0E72F8E872D046F7DB4C1FA7C83892EC73C49F461B70
end;