LoginFileGenerator Source Code

Hash Example, source code file Program.cs

using System;
using System.Text;
using System.IO;
using System.Security.Cryptography;

// Login Example -- GeneratePasswordFile
// Generate username and encrypted 
// passwords for password file.

namespace LoginFileGenerator
{
    public class Program
    {
        public static void Main()
        {
            // Array of usernames and unencrypted passwords.
            string[] unEncryptedEntries =
                {"dduck,whatsupdoc9", "efudd,abcxyz*", 
                 "ppig,porky192837465!", "sjost,rainbow9"};

// Set encryption key.
            string strKey = "upwk1133557799#";
            byte[] key = Encoding.ASCII.GetBytes(strKey.ToCharArray( ));

// Create hash object.
            HMACSHA1 hmac = new HMACSHA1(key);

// Compute password file entries and write them to password file.
            StreamWriter w = new StreamWriter("../../passwords.txt");
            foreach(string entry in unEncryptedEntries)
            {
                string[] fields = entry.Split(',');
                byte[] pw = Encoding.ASCII.GetBytes(fields[1].ToCharArray());
                byte[] hash = hmac.ComputeHash(pw);
                string pwFileEntry = fields[0] + ";" + Convert.ToBase64String(hash);
                w.WriteLine(pwFileEntry);
            }

// Close password file.
            w.Close();
        }
    }
}