Visual FoxPro

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);

Visual FoxPro

LOCAL loCrypt
LOCAL lcHexKey
LOCAL lcPw
LOCAL lcPwCharset
LOCAL lcHashAlg
LOCAL lcSaltHex
LOCAL lnIterationCount
LOCAL lnOutputBitLen
LOCAL lcEnc

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

loCrypt = CreateObject('Chilkat.Crypt2')

*  http://www.di-mgt.com.au/cryptoKDFs.html#examplespbkdf

lcPw = "password"
lcPwCharset = "ansi"
*  Hash algorithms may be: sha1, md2, md5, etc.
lcHashAlg = "sha1"
*  The salt should be 8 bytes:
lcSaltHex = "78578E5A5D63CB06"
lnIterationCount = 1000
*  Derive a 128-bit key from the password.
lnOutputBitLen = 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.)
lcEnc = "hex"

lcHexKey = loCrypt.Pbkdf1(lcPw,lcPwCharset,lcHashAlg,lcSaltHex,lnIterationCount,lnOutputBitLen,lcEnc)

? lcHexKey

*  The output should have this value:
*  DC19847E05C64D2FAF10EBFB4A3D2A20

RELEASE loCrypt