Pascal (Lazarus/Delphi)

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);

Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Crypt2;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  crypt: TCrypt2;
  hexKey: string;
  pw: string;
  pwCharset: string;
  hashAlg: string;
  saltHex: string;
  iterationCount: Integer;
  outputBitLen: Integer;
  enc: string;

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

  crypt := TCrypt2.Create;

  //  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);

  WriteLn(hexKey);

  //  The output should have this value:
  //  DC19847E05C64D2FAF10EBFB4A3D2A20


  crypt.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.