Chilkat Examples

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Visual FoxPro Examples

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(Visual FoxPro) 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);

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

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_9_5_0.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:
* DC19847E05C64D2FAF10EBFB4A3D2A2

RELEASE loCrypt


 

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