Classic ASP

PBKDF1 - Derive Key from Password

Demonstrates how to derive a symmetric encryption key from a password using PBKDF1. This example matches the results found at this URL: http://www.di-mgt.com.au/cryptoKDFs.html#examplespbkdf

It also matches the output produced by the .NET Framework using this C# code:

            byte[] salt = new byte[] { 0x78, 0x57, 0x8E, 0x5A, 0x5D, 0x63, 0xCB, 0x06 };
            PasswordDeriveBytes cdk = new PasswordDeriveBytes("password", salt);

            cdk.IterationCount = 1000;
            cdk.HashName = "SHA1";

            // generate a 16-byte key
            byte[] key = cdk.GetBytes(16);

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Classic ASP

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
' This example assumes the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

set crypt = Server.CreateObject("Chilkat.Crypt2")

' 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 = 1000
' Derive a 128-bit key from the password.
outputBitLen = 128

' 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.Pbkdf1(pw,pwCharset,hashAlg,saltHex,iterationCount,outputBitLen,enc)

Response.Write "<pre>" & Server.HTMLEncode( hexKey) & "</pre>"

' The output should have this value:
' DC19847E05C64D2FAF10EBFB4A3D2A2

%>
</body>
</html>