Derive a key of any length from a password using the PBKDF2 algorithm from PKCS #5 v2.1.
public static byte[] Kdf2( int dkLen, byte[] pwdBytes, byte[] salt, int count, HashAlgorithm hashAlg )
Public Shared Function Kdf2 ( _ dkLen As Integer, _ pwdBytes As Byte(), _ salt As Byte(), _ count As Integer, _ hashAlg As HashAlgorithm _ ) As Byte()
VB6/C equivalent: PBE_Kdf2