Rewrite IP ban management

This adds a dedicated manager class to handle all ban interactions, which is instantiated and handled by LoginManager.
IPs are now stored in the same format as the datastore, through FileUtils.

Fixes #1032 #587

1 files changed, 14 insertions, 86 deletions

diff --git a/application/security/LoginManager.php b/application/security/LoginManager.php
index 1ff3d0be..0b0ce0b1 100644
--- a/application/security/LoginManager.php
+++ b/application/security/LoginManager.php
@@ -20,8 +20,8 @@ class LoginManager
     /** @var SessionManager Session Manager instance **/
     protected $sessionManager = null;
 
-    /** @var string Path to the file containing IP bans */
-    protected $banFile = '';
+    /** @var BanManager Ban Manager instance **/
+    protected $banManager;
 
     /** @var bool Whether the user is logged in **/
     protected $isLoggedIn = false;
@@ -35,17 +35,21 @@ class LoginManager
     /**
      * Constructor
      *
-     * @param array          $globals        The $GLOBALS array (reference)
      * @param ConfigManager  $configManager  Configuration Manager instance
      * @param SessionManager $sessionManager SessionManager instance
      */
-    public function __construct(& $globals, $configManager, $sessionManager)
+    public function __construct($configManager, $sessionManager)
     {
-        $this->globals = &$globals;
         $this->configManager = $configManager;
         $this->sessionManager = $sessionManager;
-        $this->banFile = $this->configManager->get('resource.ban_file', 'data/ipbans.php');
-        $this->readBanFile();
+        $this->banManager = new BanManager(
+            $this->configManager->get('security.trusted_proxies', []),
+            $this->configManager->get('security.ban_after'),
+            $this->configManager->get('security.ban_duration'),
+            $this->configManager->get('resource.ban_file', 'data/ipbans.php'),
+            $this->configManager->get('resource.log')
+        );
+
         if ($this->configManager->get('security.open_shaarli') === true) {
             $this->openShaarli = true;
         }
@@ -158,65 +162,13 @@ class LoginManager
     }
 
     /**
-     * Read a file containing banned IPs
-     */
-    protected function readBanFile()
-    {
-        if (! file_exists($this->banFile)) {
-            return;
-        }
-        include $this->banFile;
-    }
-
-    /**
-     * Write the banned IPs to a file
-     */
-    protected function writeBanFile()
-    {
-        if (! array_key_exists('IPBANS', $this->globals)) {
-            return;
-        }
-        file_put_contents(
-            $this->banFile,
-            "<?php\n\$GLOBALS['IPBANS']=" . var_export($this->globals['IPBANS'], true) . ";\n?>"
-        );
-    }
-
-    /**
      * Handle a failed login and ban the IP after too many failed attempts
      *
      * @param array $server The $_SERVER array
      */
     public function handleFailedLogin($server)
     {
-        $ip = $server['REMOTE_ADDR'];
-        $trusted = $this->configManager->get('security.trusted_proxies', []);
-
-        if (in_array($ip, $trusted)) {
-            $ip = getIpAddressFromProxy($server, $trusted);
-            if (! $ip) {
-                // the IP is behind a trusted forward proxy, but is not forwarded
-                // in the HTTP headers, so we do nothing
-                return;
-            }
-        }
-
-        // increment the fail count for this IP
-        if (isset($this->globals['IPBANS']['FAILURES'][$ip])) {
-            $this->globals['IPBANS']['FAILURES'][$ip]++;
-        } else {
-            $this->globals['IPBANS']['FAILURES'][$ip] = 1;
-        }
-
-        if ($this->globals['IPBANS']['FAILURES'][$ip] >= $this->configManager->get('security.ban_after')) {
-            $this->globals['IPBANS']['BANS'][$ip] = time() + $this->configManager->get('security.ban_duration', 1800);
-            logm(
-                $this->configManager->get('resource.log'),
-                $server['REMOTE_ADDR'],
-                'IP address banned from login'
-            );
-        }
-        $this->writeBanFile();
+        $this->banManager->handleFailedAttempt($server);
     }
 
     /**
@@ -226,13 +178,7 @@ class LoginManager
      */
     public function handleSuccessfulLogin($server)
     {
-        $ip = $server['REMOTE_ADDR'];
-        // FIXME unban when behind a trusted proxy?
-
-        unset($this->globals['IPBANS']['FAILURES'][$ip]);
-        unset($this->globals['IPBANS']['BANS'][$ip]);
-
-        $this->writeBanFile();
+        $this->banManager->clearFailures($server);
     }
 
     /**
@@ -244,24 +190,6 @@ class LoginManager
      */
     public function canLogin($server)
     {
-        $ip = $server['REMOTE_ADDR'];
-
-        if (! isset($this->globals['IPBANS']['BANS'][$ip])) {
-            // the user is not banned
-            return true;
-        }
-
-        if ($this->globals['IPBANS']['BANS'][$ip] > time()) {
-            // the user is still banned
-            return false;
-        }
-
-        // the ban has expired, the user can attempt to log in again
-        logm($this->configManager->get('resource.log'), $server['REMOTE_ADDR'], 'Ban lifted.');
-        unset($this->globals['IPBANS']['FAILURES'][$ip]);
-        unset($this->globals['IPBANS']['BANS'][$ip]);
-
-        $this->writeBanFile();
-        return true;
+        return ! $this->banManager->isBanned($server);
     }
 }