(PHP Extension) PBKDF2 - Derive Key from Password

Demonstrates how to derive a symmetric encryption key from a password using PBKDF2. This example matches the results found at this URL: http://www.di-mgt.com.au/cryptoKDFs.html#examplespbkdf

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<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

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

$crypt = new CkCrypt2();

// 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 = 2048;
// Derive a 192-bit key from the password.
$outputBitLen = 192;

// 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);

print $hexKey . "\n";

// The output should have this value:
// BFDE6BE94DF7E11DD409BCE20A0255EC327CB936FFE9364

?>