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

Download Chilkat Crypt ActiveX

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
Set outFile = fso.CreateTextFile("output.txt", True)

set crypt = CreateObject("Chilkat.Crypt2")

success = crypt.UnlockComponent("Anything for 30-day trial")
If (success <> 1) Then
    MsgBox crypt.LastErrorText
    WScript.Quit
End If

'  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)

outFile.WriteLine(hexKey)

'  The output should have this value:
'  BFDE6BE94DF7E11DD409BCE20A0255EC327CB936FFE93643


outFile.Close