Add login functionality

public_html/modules/login.php

@@ -0,0 +1,49 @@
+<?php
+/*
+ * Cryto is more free software. It is licensed under the WTFPL, which
+ * allows you to do pretty much anything with it, without having to
+ * ask permission. Commercial use is allowed, and no attribution is
+ * required. We do politely request that you share your modifications
+ * to benefit other developers, but you are under no enforced
+ * obligation to do so :)
+ * 
+ * Please read the accompanying LICENSE document for the full WTFPL
+ * licensing text.
+ */
+
+if(!isset($_APP)) { die("Unauthorized."); }
+
+if(empty($_POST['username']))
+{
+	flash_error("You did not enter a username.");
+}
+
+if(empty($_POST['password']))
+{
+	flash_error("You did not enter a password.");
+}
+
+if(count(get_errors(false)) == 0)
+{
+	try
+	{
+		$sUser = User::CreateFromQuery("SELECT * FROM users WHERE `Username` = :Username", array(":Username" => $_POST['username']), 30, true);
+	}
+	catch (NotFoundException $e)
+	{
+		flash_error("Invalid username.");
+		redirect("/");
+	}
+	
+	if($sUser->VerifyPassword($_POST['password']))
+	{
+		$sUser->Authenticate();
+	}
+	else
+	{
+		flash_error("Invalid password.");
+		redirect("/");
+	}
+}
+
+redirect("/");

public_html/rewrite.php

@@ -25,6 +25,10 @@ $router->ignore_query = true;
 $router->routes = array(
 	0 => array(
 		"^/$"		=> "modules/homepage.php",
+		"^/login$"	=> array(
+			"target"	=> "modules/login.php",
+			"methods"	=> "post"
+		),
 		"^/(.*)$"	=> "modules/page.php"
 	)
 );