Delphi ActiveX

PBKDF1 - Derive Key from Password

See more Encryption Examples

Demonstrates how to derive a symmetric encryption key from a password using PBKDF1. This example matches the results found at this URL: http://www.di-mgt.com.au/cryptoKDFs.html#examplespbkdf

It also matches the output produced by the .NET Framework using this C# code:

            byte[] salt = new byte[] { 0x78, 0x57, 0x8E, 0x5A, 0x5D, 0x63, 0xCB, 0x06 };
            PasswordDeriveBytes cdk = new PasswordDeriveBytes("password", salt);

            cdk.IterationCount = 1000;
            cdk.HashName = "SHA1";

            // generate a 16-byte key
            byte[] key = cdk.GetBytes(16);

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;
hexKey: WideString;
pw: WideString;
pwCharset: WideString;
hashAlg: WideString;
saltHex: WideString;
iterationCount: Integer;
outputBitLen: Integer;
enc: WideString;

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

crypt := TChilkatCrypt2.Create(Self);

// http://www.di-mgt.com.au/cryptoKDFs.html#examplespbkdf

pw := 'password';
pwCharset := 'ansi';
// Hash algorithms may be: sha1, md2, md5, etc.
hashAlg := 'sha1';
// The salt should be 8 bytes:
saltHex := '78578E5A5D63CB06';
iterationCount := 1000;
// Derive a 128-bit key from the password.
outputBitLen := 128;

// 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.Pbkdf1(pw,pwCharset,hashAlg,saltHex,iterationCount,outputBitLen,enc);

Memo1.Lines.Add(hexKey);

// The output should have this value:
// DC19847E05C64D2FAF10EBFB4A3D2A2
end;