JavaScript

PBKDF2 - Derive Key from Password

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

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

JavaScript

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

var crypt = new CkCrypt2();

var pw = "password";

var pwCharset = "utf-8";

// Such as sha256, sha512
var hashAlg = "sha256";

// 16 bytes
var saltHex = "78578E5A5D63CB0668AB39B21C8637FA";

var iterationCount = 100000;

// Derive a 256-bit key from the password.
var 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.)
var enc = "hex";

var hexKey = crypt.Pbkdf2(pw,pwCharset,hashAlg,saltHex,iterationCount,outputBitLen,enc);

console.log(hexKey);

// Sample output:
// AE96E261E32792D0FD6F0E72F8E872D046F7DB4C1FA7C83892EC73C49F461B70