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 crypt As New ChilkatCrypt2

Dim success As Long
success = crypt.UnlockComponent("Anything for 30-day trial")
If (success <> 1) Then
    MsgBox crypt.LastErrorText
    Exit Sub
End If

Dim hexKey As String
'  http://www.di-mgt.com.au/cryptoKDFs.html#examplespbkdf

Dim pw As String
pw = "password"
Dim pwCharset As String
pwCharset = "ansi"
'  Hash algorithms may be: sha1, md2, md5, etc.
Dim hashAlg As String
hashAlg = "sha1"
'  The salt should be 8 bytes:
Dim saltHex As String
saltHex = "78578E5A5D63CB06"
Dim iterationCount As Long
iterationCount = 2048
'  Derive a 192-bit key from the password.
Dim outputBitLen As Long
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.)
Dim enc As String
enc = "hex"

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

Text1.Text = Text1.Text & hexKey & vbCrLf

'  The output should have this value:
'  BFDE6BE94DF7E11DD409BCE20A0255EC327CB936FFE93643