Please help me solve a bug with my licencing system!

<p>Hello all,</p> <p>I am creating a simple licencing system to help licence my own programs and also to help others via github. I have come across a bug that I don&#39;t really understand and am asking for some advice.</p> <p>I will add the client code soon. I also hope to add more advanced features.</p> <p>Basically,</p> <ol> <li>I have a server that listens on a port and hosts a login and register handler.</li> <li>The client will send the username and password (localhost:8080/login/username-password) to the login handler.</li> <li>The server will hash the password and check it against a local file with all the hashes stored locally on my computer.</li> <li>The server will report back if it succeeded or failed.</li> </ol> <p>When I enter the username and password, it seems as though it doesn&#39;t check the password. I can put any password and it will say success as long as I have the username right.</p> <p>I appreciate all suggestions, even if they don&#39;t fix the bug.</p> <p>Thanks!</p> <p>Code: <a href="https://gist.github.com/seriousnerve/1830e77d3e2891b0a5b158c9fb02b37f" rel="nofollow">https://gist.github.com/seriousnerve/1830e77d3e2891b0a5b158c9fb02b37f</a> </p> <hr/>**评论：**<br/><br/>justinisrael: <pre><p>You aren&#39;t checking any of your errors anywhere. If something goes wrong building your hash and you end up with HashDecoded being an empty string, then it will always return true when asking if it&#39;s contained</p></pre>