(VBScript) 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 ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

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

set crypt = CreateObject("Chilkat.Crypt2")

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)

outFile.WriteLine(hexKey)

' Sample output:
' AE96E261E32792D0FD6F0E72F8E872D046F7DB4C1FA7C83892EC73C49F461B70

outFile.Close