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			591 lines
		
	
	
		
			19 KiB
		
	
	
	
		
			PHP
		
	
	
	
	
	
			
		
		
	
	
			591 lines
		
	
	
		
			19 KiB
		
	
	
	
		
			PHP
		
	
	
	
	
	
| <?php
 | |
| /**
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| * Class that encapsulates everything that can be done with a user
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| */
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| class User
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| {
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|   private $id;
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|   private $name;
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|   private $surname;
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|   private $username;
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|   private $email;
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|   private $rank;
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|   private $active;
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| 
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|   /**
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|    * Gets user data from database and creates the class
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|    * @param int $id user ID
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|    */
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|   function __construct($id)
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|   {
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|     global $mysqli;
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|     $stmt = $mysqli->prepare("SELECT * FROM users WHERE id=?");
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|     $stmt->bind_param("d", $id);
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|     $stmt->execute();
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|     $query = $stmt->get_result();
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| 
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|     if (!$query->num_rows)
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|     {
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|       throw new Exception("User doesn't exist.");
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|       return;
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|     }
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| 
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|     $result = $query->fetch_array();
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|     $this->id = $id;
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|     $this->active = $result['active'];
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|     $this->name = $result['name'];
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|     $this->email = $result['email'];
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|     $this->surname = $result['surname'];
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|     $this->username = $result['username'];
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|     $this->rank = $result['permission'];
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|   }
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| 
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|   /**
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|    * Returns username of this user
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|    * @return String username
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|    */
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|   public function get_username()
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|   {
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|     return $this->username;
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|   }
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|   
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|   /**
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|    * Returns whether this user is active
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|    * @return Boolean user active status
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|    */
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|   public function is_active()
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|   {
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|     return $this->active;
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|   }
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|   
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|   /**
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|    * Returns rank of this user
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|    * @return int rank
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|    */
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|   public function get_rank()
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|   {
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|     return $this->rank;
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|   }
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|   
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|   /**
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|    * Returns full name of this user
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|    * @return String name in "Name Surname" format
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|    */
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|   public function get_name()
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|   {
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|     return $this->name . " " . $this->surname;
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|   }
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| 
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|   /**
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|    * Toggles active status of this user. First checks if the user
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|    * making the change has permission to do that.
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|    * @return void
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|    */
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|   public function toggle()
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|   {
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|     global $mysqli, $message, $user;
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|     $id = $_SESSION['user'];
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|     $stmt = $mysqli->prepare("SELECT permission FROM users WHERE id=?");
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|     $stmt->bind_param("i", $id);
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|     $stmt->execute();
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|     $query = $stmt->get_result();
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|     $permission = $result['permission'];
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|     $id = $_GET['id'];
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|     if ($this->id!=$_SESSION['user'] && $user->get_rank()<=1 && ($user->get_rank()<$this->rank))
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|     {
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|       $stmt = $mysqli->prepare("UPDATE users SET active = !active WHERE id=?");
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|       $stmt->bind_param("i", $this->id);
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|       $stmt->execute();
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|       $stmt->close();
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|       header("Location: ".WEB_URL."/admin/?do=user&id=".$id);
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|     }else{
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|       $message = _("You don't have the permission to do that!");
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|     }
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|   }
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| 
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|   /**
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|    * Processes submitted form and adds user unless problem is encountered, 
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|    * calling this is possible only for Superadmin (other ranks cannot add users)
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|    * or when the installation script is being run. Also checks requirements
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|    * for username and email being unique and char limits.
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|    * @return void
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|    */
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|   public static function add()
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|   {
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|     global $user, $message, $mysqli;
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|     if (INSTALL_OVERRIDE || $user->get_rank()==0)
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|     {
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|       if (strlen(trim($_POST['name']))==0) {
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|         $messages[] = _("name");
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|       }
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|       if(strlen(trim($_POST['surname']))==0) {
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|         $messages[] = _("surname");
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|       }
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|       if(strlen(trim($_POST['email']))==0) {
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|         $messages[] = _("email");
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|       }
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|       if(strlen(trim($_POST['password']))==0) {
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|         $messages[] = _("password");
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|       }
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|       if(!isset($_POST['permission']))
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|       {
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|         $messages[] = _("rank");
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|       }
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| 
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|       if (!isset($messages)){
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|         $name = $_POST['name'];
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|         $surname = $_POST['surname'];
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|         $username = $_POST['username'];
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|         $email = $_POST['email'];
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|         $pass = $_POST['password'];
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| 
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|         $variables = array();
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|         if (strlen($name)>50){
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|           $variables[] = 'name: 50';
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|         }
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|         if (strlen($surname)>50){
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|           $variables[] = 'surname: 50';
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|         }
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|         if (strlen($username)>50){
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|           $variables[] = 'username: 50';
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|         }
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|         if (strlen($email)>60){
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|           $variables[] = 'email: 60';
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|         }
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| 
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|         if (!empty($variables))
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|         {
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|           $message = _("Please mind the following character limits: ");
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|           $message .= implode(", ", $variables);
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|           return;
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|         }
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| 
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|         $salt = uniqid(mt_rand(), true);
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|         $hash = hash('sha256', $pass.$salt);
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|         $permission = $_POST['permission'];
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|         
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| 
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|         $stmt = $mysqli->prepare("INSERT INTO users values (NULL, ?, ?, ?, ?, ?, ?, ?, 1)");
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|         $stmt->bind_param("ssssssi", $email, $username, $name, $surname, $hash, $salt, $permission);
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|         $stmt->execute();
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| 
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|         if ($stmt->affected_rows>0)
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|         {
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|           $to      = $email;
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|           $subject = _('User account created').' - '.NAME;
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|           $msg = sprintf(_("Hi %s!<br>"."Your account has been created. You can login with your email address at <a href=\"%s\">%s</a> with password %s - please change it as soon as possible."), $name." ".$surname,WEB_URL."/admin", WEB_URL."/admin", $pass);
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|           $headers = "Content-Type: text/html; charset=utf-8 ".PHP_EOL;
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|           $headers .= "MIME-Version: 1.0 ".PHP_EOL;
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|           $headers .= "From: ".MAILER_NAME.' <'.MAILER_ADDRESS.'>'.PHP_EOL;
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|           $headers .= "Reply-To: ".MAILER_NAME.' <'.MAILER_ADDRESS.'>'.PHP_EOL; 
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| 
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|           mail($to, $subject, $msg, $headers);
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|           if (!INSTALL_OVERRIDE) 
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|           {
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|             header("Location: ".WEB_URL."/admin/?do=settings");
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|           }
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|         }
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|         else{
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|           $message = _("Username or email already used");
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|         }
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|       }
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|       else{
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|         $message = "Please enter ".implode(", ", $messages);
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|       }
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|     }
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|     else {
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|       $message = _("You don't have the permission to do that!");
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|     }
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|   }
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| 
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|   /**
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|    * Processes submitted form and logs user in, unless the user is deactivated or wrong
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|    * password or email has been submitted. The script doesn't let anyone know which
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|    * field was wrong as it is not possible to verify email address from outside admin panel,
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|    * so this actually helps with security :)
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|    * @return void
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|    */
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|   public static function login()
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|   {
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|     global $message, $mysqli;
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|     if (isset($_POST['email']))
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|     {
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|       $email = $_POST['email'];
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|       $pass = $_POST['pass'];
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| 
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|       $stmt = $mysqli->prepare("SELECT id,password_salt as salt,active FROM users WHERE email=?");
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|       $stmt->bind_param("s", $email);
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|       $stmt->execute();
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|       $query = $stmt->get_result();
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|       if ($query->num_rows)
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|       {
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|         $result = $query->fetch_assoc();
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| 
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|         $salt = $result["salt"];
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|         $id =  $result["id"];
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|         $active =  $result["active"];
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|         if (!$active)
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|         {
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|           $message = _("Your account has been disabled. Please contact administrator.");
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|         }
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|         else
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|         {
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|           $hash = hash('sha256', $pass.$salt);
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| 
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|           $stmt = $mysqli->prepare("SELECT count(*) as count FROM users WHERE id=? AND password_hash=?");
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|           $stmt->bind_param("is", $id, $hash);
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|           $stmt->execute();
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|           $query = $stmt->get_result();
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|           if (!$query->fetch_assoc()['count'])
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|           {
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|             $message = _("Wrong email or password");
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|           }else
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|           {
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|             if (isset($_POST['remember'])&&$_POST['remember'])
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|             {
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|               $year = strtotime('+356 days', time());
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|               $token = Token::new($id, 'remember', $year);
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|               setcookie('token', $token, $year, "/");
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|               setcookie('user', $id, $year, "/");
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|             }
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|             $_SESSION['user'] = $id;
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|             header("Location: ".WEB_URL."/admin");
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|           }
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|         }
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|       }
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|       else{
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|         $message = _("Wrong email or password");
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|       }
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|     }
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|   }
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| 
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|   /**
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|    * Checks whether token is valid (this means is in database and associated
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|    * with the user) and sets session data if it is, so user remains logged in.
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|    * The script deletes the token either way.
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|    * @return void
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|    */
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|   public static function restore_session()
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|   {
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|     global $mysqli, $message;
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|     $id = $_COOKIE['user'];
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|     $token = $_COOKIE['token'];
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|     $time = time();
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|     if (Token::validate_token($token, $id, "remember"))
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|     {
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|       $year = strtotime('+356 days', time());
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|       unset($_COOKIE['token']);
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|       $_SESSION['user'] = $id;
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|       $token = Token::new($id, 'remember', $year);
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|       setcookie('token', $token, $year);
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|     }
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|     else
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|     {
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|       unset($_COOKIE['user']);
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|       unset($_COOKIE['token']);
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|       setcookie('user', null, -1, '/');
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|       setcookie('token', null, -1, '/');
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|       $message = _("Invalid token detected, please login again!");
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|     }
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|     
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|     Token::delete($token);
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|   }
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|   /**
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|    * Renders settings for this user so it can be displayed in admin panel.
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|    * @return void
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|    */
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|   public function render_user_settings()
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|   {
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|     global $permissions, $user;
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|     ?>
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|     <div class="row">
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|       <div class="col-md-2 col-md-offset-2"><img src="https://www.gravatar.com/avatar/<?php echo md5( strtolower( trim( $this->email ) ) );?>" alt="<?php echo _("Profile picture");?>"></div>
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|       <div class="col-md-6"><h3><?php echo $this->name." ".$this->surname;?></h3></div>
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|     </div>
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|     <div class="row">
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|       <div class="col-md-2 col-md-offset-2"><strong><?php echo _("ID");?></strong></div>
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|       <div class="col-md-6"><?php echo $this->id; ?></div>
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|     </div>
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|     <div class="row">
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|       <div class="col-md-2 col-md-offset-2"><strong><?php echo _("Username");?></strong></div>
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|       <div class="col-md-6"><?php echo $this->username." "; if ($this->id!=$_SESSION['user'] && $user->get_rank()<=1 && ($user->get_rank()<$this->rank))
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|       {
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|         echo "<a href='".WEB_URL."/admin/?do=user&id=".$this->id."&what=toggle'>";
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|         echo "<i class='fa fa-".($this->active?"check success":"times danger")."'></i></a>";
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|       }else{
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|         echo "<i class='fa fa-".($this->active?"check success":"times danger")."'></i>";
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|       }?></div>
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|     </div>
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| 
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|     <form action="<?php echo WEB_URL;?>/admin/?do=user&id=<?php echo $this->id; ?>" method="POST">
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|       <div class="row">
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|         <div class="col-md-2 col-md-offset-2"><strong><?php echo _("Role");?></strong></div>
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|         <div class="col-md-6"><?php if ($user->get_rank() == 0 && $this->id != $_SESSION['user']){?> <div class="input-group"><select class="form-control" name="permission"><?php foreach ($permissions as $key => $value) {
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|           echo "<option value='$key' ".($key==$this->rank?"selected":"").">$value</option>";
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|         } ?>
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|         </select><span class="input-group-btn">
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|           <button type="submit" class="btn btn-primary pull-right"><?php echo _("Change role");?></button>
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|         </span>
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|       </div><?php }else{ echo $permissions[$this->rank];}?></div>
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|     </div>
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|   </form>
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| 
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|   <?php if($this->id==$_SESSION['user'])
 | |
|   {?>
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|     <form action="<?php echo WEB_URL;?>/admin/?do=user" method="POST">
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|       <div class="row">
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|         <div class="col-md-2 col-md-offset-2"><strong>Email</strong></div>
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|         <div class="col-md-6">
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|           <div class="input-group">
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|             <input type="email" class="form-control" name="email" value="<?php echo $this->email; ?>">
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|             <span class="input-group-btn">
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|               <button type="submit" class="btn btn-primary pull-right"><?php echo _("Change email");?></button>
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|             </span>
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|           </div>
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|         </div>
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|       </div>
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|     </form>
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|     <form action="<?php echo WEB_URL;?>/admin/?do=user" method="POST">
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|       <div class="row">
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|         <div class="col-md-2 col-md-offset-2"><strong><?php echo _("Password");?></strong></div>
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|         <div class="col-md-6">
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|           <label for="password"><?php echo _("Old password");?></label>
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|           <input id="password" placeholder="<?php echo _("Old password");?>" type="password" class="form-control" name="old_password">
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|           <label for="new_password"><?php echo _("New password");?></label>
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|           <input id="new_password" placeholder="<?php echo _("New password");?>" type="password" class="form-control" name="password">
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|           <label for="new_password_check"><?php echo _("Repeat password");?></label>
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|           <input id="new_password_check" placeholder="<?php echo _("Repeat password");?>" type="password" class="form-control" name="password_repeat">
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|           <button type="submit" class="btn btn-primary pull-right margin-top"><?php echo _("Change password");?></button>
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|         </div>
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|       </div>
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|     </form>
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|     <?php
 | |
|   }
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|   else
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|   {
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|     ?>
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|     <div class="row">
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|       <div class="col-md-2 col-md-offset-2"><strong><?php echo _("Email");?></strong></div>
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|       <div class="col-md-6">
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|         <a href="mailto:<?php echo $this->email; ?>"><?php echo $this->email; ?></a>
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|       </div>
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|     </div>
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|     <?php
 | |
|   }
 | |
| 
 | |
|   }
 | |
| 
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|   /**
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|    * Changes user password and deletes all remember tokens so all other sessions 
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|    * won't stay logged in without knowing new pass. Uses token when reseting password.
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|    * @param String $token
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|    * @return void
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|    */
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|   public function change_password($token = false)
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|   {
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|     global $mysqli, $user, $message;
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|     $time = time();
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|     $id = $this->id;
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|     if ($_POST['password']!=$_POST['password_repeat'])
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|     {
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|       $message = _("Passwords do not match!");
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|     }else{
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|       if (!$token)
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|       {
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|         if ($_SESSION['user']!=$id)
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|         {
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|           $message = _("Cannot change password of other users!");
 | |
|         }else{
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|           $stmt = $mysqli->prepare("SELECT password_salt as salt FROM users WHERE id=?");
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|           $stmt->bind_param("i", $id);
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|           $stmt->execute();
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|           $query = $stmt->get_result();
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| 
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|           $result = $query->fetch_assoc();
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|           $salt = $result['salt'];
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|           $pass = $_POST['old_password'];
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|           $hash = hash('sha256', $pass.$salt);
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| 
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|           $stmt = $mysqli->prepare("SELECT count(*) as count FROM users WHERE id=? AND password_hash = ?");
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|           $stmt->bind_param("is", $id, $hash);
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|           $stmt->execute();
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|           if ($stmt->get_result()->fetch_assoc()['count'])
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|           {
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|             $pass = $_POST['password'];
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|             $hash = hash('sha256', $pass.$salt);
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|             $stmt = $mysqli->prepare("UPDATE users SET password_hash = ? WHERE id=?");
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|             $stmt->bind_param("si", $hash, $id);
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|             $stmt->execute();
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|             $stmt->close();
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|             $stmt = $mysqli->prepare("DELETE FROM tokens WHERE user = ? AND data = 'remember'");
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| 		    $stmt->bind_param("d", $id);
 | |
| 		    $stmt->execute();
 | |
| 		    $query = $stmt->get_result();
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|             User::logout();
 | |
|           }
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|           else{
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|             $message = _("Wrong password!");
 | |
|           }
 | |
|         }
 | |
|       }else{
 | |
|         if (Token::validate_token($token, $id, "passwd"))
 | |
|         {
 | |
|           $stmt = $mysqli->prepare("SELECT password_salt as salt FROM users WHERE id=?");
 | |
|           $stmt->bind_param("i", $id);
 | |
|           $stmt->execute();
 | |
|           $query = $stmt->get_result();
 | |
|           $result = $query->fetch_assoc();
 | |
|           $salt = $result['salt'];
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|           $pass = $_POST['password'];
 | |
|           $hash = hash('sha256', $pass.$salt);
 | |
| 
 | |
|           $stmt = $mysqli->prepare("UPDATE users SET password_hash = ? WHERE id=?");
 | |
|           $stmt->bind_param("si", $hash,$id);
 | |
|           $stmt->execute();
 | |
|           $stmt->close();
 | |
|           $stmt = $mysqli->prepare("DELETE FROM tokens WHERE user = ? AND data = 'remember'");
 | |
| 		  $stmt->bind_param("d", $id);
 | |
| 		  $stmt->execute();
 | |
| 		  $query = $stmt->get_result();
 | |
|         }
 | |
|         else
 | |
|         {
 | |
|           $message = _("Invalid token detected, please retry your request from start!");
 | |
|         }
 | |
| 
 | |
|         Token::delete($token);
 | |
|       }
 | |
|     }
 | |
|   }
 | |
| 
 | |
|   /**
 | |
|    * Sends email with link for password reset, link is token protected and valid only once.
 | |
|    * @return void
 | |
|    */
 | |
|   public static function password_link()
 | |
|   {
 | |
|     global $mysqli;
 | |
|     $email = $_POST['email'];
 | |
| 
 | |
|     $stmt = $mysqli->prepare("SELECT id FROM users WHERE email=?");
 | |
|     $stmt->bind_param("s", $email);
 | |
|     $stmt->execute();
 | |
|     $query = $stmt->get_result();
 | |
| 
 | |
|     $id = $query->fetch_assoc()['id'];    
 | |
|     $time = strtotime('+1 day', time());
 | |
| 
 | |
|     $token = Token::new($id, 'passwd', $time);
 | |
| 
 | |
|     $link = WEB_URL."/admin/?do=lost-password&id=$id&token=$token";
 | |
|     $to      = $email;
 | |
|     $user = new User($id);
 | |
|     $subject = _('Reset password') . ' - '.NAME;
 | |
|     $msg = sprintf(_( "Hi %s!<br>Below you will find link to change your password. The link is valid for 24hrs. If you didn't request this, feel free to ignore it. <br><br><a href=\"%s\">RESET PASSWORD</a><br><br>If the link doesn't work, copy & paste it into your browser: <br>%s"), $user->get_name(), $link, $link);
 | |
|     $headers = "Content-Type: text/html; charset=utf-8 ".PHP_EOL;
 | |
|     $headers .= "MIME-Version: 1.0 ".PHP_EOL;
 | |
|     $headers .= "From: ".MAILER_NAME.' <'.MAILER_ADDRESS.'>'.PHP_EOL;
 | |
|     $headers .= "Reply-To: ".MAILER_NAME.' <'.MAILER_ADDRESS.'>'.PHP_EOL; 
 | |
| 
 | |
|     mail($to, $subject, $msg, $headers);
 | |
|   } 
 | |
| 
 | |
|   /**
 | |
|    * Sends email with link for email change confirmation (security reasons), link is token protected and valid only once.
 | |
|    * @return void
 | |
|    */
 | |
|   public function email_link(){
 | |
|     global $mysqli;
 | |
|     $email = $_POST['email'];
 | |
|     $time = strtotime('+1 day', time());
 | |
|     $id = $this->id;
 | |
| 
 | |
|     $token = Token::new($id, 'email;$email', $time);
 | |
| 
 | |
| 
 | |
|     $link = WEB_URL."/admin/?do=change-email&id=$id&token=$token";
 | |
|     $to      = $email;
 | |
|     $subject = _('Email change').' - '.NAME;
 | |
|     $msg = sprintf(_( "Hi %s!<br>Below you will find link to change your email. The link is valid for 24hrs. If you didn't request this, feel free to ignore it. <br><br><a href=\"%s\">CHANGE EMAIL</a><br><br>If the link doesn't work, copy & paste it into your browser: <br>%s"), $user->get_name(), $link, $link);
 | |
|     $headers = "Content-Type: text/html; charset=utf-8 ".PHP_EOL;
 | |
|     $headers .= "MIME-Version: 1.0 ".PHP_EOL;
 | |
|     $headers .= "From: ".MAILER_NAME.' <'.MAILER_ADDRESS.'>'.PHP_EOL;
 | |
|     $headers .= "Reply-To: ".MAILER_NAME.' <'.MAILER_ADDRESS.'>'.PHP_EOL; 
 | |
| 
 | |
|     mail($to, $subject, $msg, $headers);
 | |
|   }
 | |
| 
 | |
|   /**
 | |
|    * Changes email.
 | |
|    * @return void
 | |
|    */
 | |
|   public function change_email()
 | |
|   {
 | |
|     global $mysqli, $message;
 | |
|     $time = time();
 | |
|     $token = $_GET['token'];
 | |
|     $id = $_GET['id'];
 | |
| 
 | |
|     if (Token::validate_token($token, $id, "email;%"))
 | |
|     {
 | |
|       $data = explode(";", $result['data']);
 | |
| 
 | |
|       $email = $data[1];
 | |
| 
 | |
|       $stmt = $mysqli->prepare("UPDATE users SET email = ? WHERE id=?");
 | |
|       $stmt->bind_param("sd", $email, $id);
 | |
|       $stmt->execute();
 | |
|       $query = $stmt->get_result();
 | |
|       Token::delete($token);
 | |
|       header("Location: ".WEB_URL."/admin/");
 | |
|     }
 | |
|     else
 | |
|     {
 | |
|       $message = _("Invalid token detected, please retry your request from start!");
 | |
|     }
 | |
| 
 | |
|     Token::delete($token);
 | |
| 
 | |
|   }
 | |
| 
 | |
|   /**
 | |
|    * Logs current user out.
 | |
|    * @return void
 | |
|    */
 | |
|   public static function logout(){
 | |
|     global $mysqli;
 | |
|     session_unset();
 | |
|     if (isset($_COOKIE['token']))
 | |
|     {
 | |
|       $token = $_COOKIE['token'];
 | |
|       $time = time();
 | |
|       Token::delete($token);
 | |
|       unset($_COOKIE['user']);
 | |
|       unset($_COOKIE['token']);
 | |
|       setcookie('user', null, -1, '/');
 | |
|       setcookie('token', null, -1, '/');
 | |
|     }
 | |
|     header("Location: ".WEB_URL."/admin");
 | |
|   }
 | |
| 
 | |
|   /**
 | |
|    * Changes permissions of current user - only super admin can do this, so it checks permission first.
 | |
|    * @return void
 | |
|    */
 | |
|   public function change_permission(){
 | |
|     global $mysqli, $message, $user;
 | |
|     if ($user->get_rank()==0)
 | |
|     {
 | |
|       $permission = $_POST['permission'];
 | |
|       $id = $_GET['id'];
 | |
|       $stmt = $mysqli->prepare("UPDATE users SET permission=? WHERE id=?");
 | |
|       $stmt->bind_param("si", $permission, $id);
 | |
|       $stmt->execute();  
 | |
|       header("Location: ".WEB_URL."/admin/?do=user&id=".$id);
 | |
|     }
 | |
|     else{
 | |
|       $message = _("You don't have permission to do that!");
 | |
|     }
 | |
|   }
 | |
| }          
 |