Xojo Plugin

PBKDF1 - Derive Key from Password

See more Encryption Examples

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);

Xojo Plugin

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

Dim crypt As New Chilkat.Crypt2

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 Int32
iterationCount = 1000
// Derive a 128-bit key from the password.
Dim outputBitLen As Int32
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.)
Dim enc As String
enc = "hex"

hexKey = crypt.Pbkdf1(pw,pwCharset,hashAlg,saltHex,iterationCount,outputBitLen,enc)

System.DebugLog(hexKey)

// The output should have this value:
// DC19847E05C64D2FAF10EBFB4A3D2A2