(Ruby) 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 Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

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

crypt = Chilkat::CkCrypt2.new()

# 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)

print hexKey + "\n";

# The output should have this value:
# DC19847E05C64D2FAF10EBFB4A3D2A2