2 files changed, 69 insertions, 24 deletions

diff --git a/application/LoginManager.php b/application/LoginManager.php
index d81c6c05..347fb3b9 100644
--- a/application/LoginManager.php
+++ b/application/LoginManager.php
@@ -1,6 +1,8 @@
 <?php
 namespace Shaarli;
 
+use Shaarli\Config\ConfigManager;
+
 /**
  * User login management
  */
@@ -62,34 +64,24 @@ class LoginManager
             return;
         }
 
+        $clientIpId = client_ip_id($server);
+
         if (isset($cookie[SessionManager::$LOGGED_IN_COOKIE])
             && $cookie[SessionManager::$LOGGED_IN_COOKIE] === $token
         ) {
-            $this->sessionManager->storeLoginInfo($server);
+            $this->sessionManager->storeLoginInfo($clientIpId);
             $this->isLoggedIn = true;
         }
 
-        // Logout when:
-        // - the session does not exist on the server side
-        // - the session has expired
-        // - the client IP address has changed
-        if (empty($session['uid'])
-            || ($this->configManager->get('security.session_protection_disabled') === false
-                && $session['ip'] != client_ip_id($server))
-            || time() >= $session['expires_on']
+        if ($this->sessionManager->hasSessionExpired()
+            || $this->sessionManager->hasClientIpChanged($clientIpId)
         ) {
             $this->sessionManager->logout($webPath);
             $this->isLoggedIn = false;
             return;
         }
 
-        // Extend session validity
-        if (! empty($session['longlastingsession'])) {
-            // "Stay signed in" is enabled
-            $session['expires_on'] = time() + $session['longlastingsession'];
-        } else {
-            $session['expires_on'] = time() + SessionManager::$INACTIVITY_TIMEOUT;
-        }
+        $this->sessionManager->extendSession();
     }
 
     /**
@@ -129,7 +121,8 @@ class LoginManager
             return false;
         }
 
-        $this->sessionManager->storeLoginInfo($server);
+        $clientIpId = client_ip_id($server);
+        $this->sessionManager->storeLoginInfo($clientIpId);
         logm(
             $this->configManager->get('resource.log'),
             $server['REMOTE_ADDR'],
diff --git a/application/SessionManager.php b/application/SessionManager.php
index 7bfd2220..63eeb8aa 100644
--- a/application/SessionManager.php
+++ b/application/SessionManager.php
@@ -1,21 +1,23 @@
 <?php
 namespace Shaarli;
 
+use Shaarli\Config\ConfigManager;
+
 /**
  * Manages the server-side session
  */
 class SessionManager
 {
-    /** Session expiration timeout, in seconds */
+    /** @var int Session expiration timeout, in seconds */
     public static $INACTIVITY_TIMEOUT = 3600;
 
-    /** Name of the cookie set after logging in **/
+    /** @var string Name of the cookie set after logging in **/
     public static $LOGGED_IN_COOKIE = 'shaarli_staySignedIn';
 
-    /** Local reference to the global $_SESSION array */
+    /** @var array Local reference to the global $_SESSION array */
     protected $session = [];
 
-    /** ConfigManager instance **/
+    /** @var ConfigManager Configuration Manager instance **/
     protected $conf = null;
 
     /**
@@ -94,18 +96,31 @@ class SessionManager
     /**
      * Store user login information after a successful login
      *
-     * @param array $server The global $_SERVER array
+     * @param string $clientIpId Client IP address identifier
      */
-    public function storeLoginInfo($server)
+    public function storeLoginInfo($clientIpId)
     {
         // Generate unique random number (different than phpsessionid)
         $this->session['uid'] = sha1(uniqid('', true) . '_' . mt_rand());
-        $this->session['ip'] = client_ip_id($server);
+        $this->session['ip'] = $clientIpId;
         $this->session['username'] = $this->conf->get('credentials.login');
         $this->session['expires_on'] = time() + self::$INACTIVITY_TIMEOUT;
     }
 
     /**
+     * Extend session validity
+     */
+    public function extendSession()
+    {
+        if (! empty($this->session['longlastingsession'])) {
+            // "Stay signed in" is enabled
+            $this->session['expires_on'] = time() + $this->session['longlastingsession'];
+            return;
+        }
+        $this->session['expires_on'] = time() + self::$INACTIVITY_TIMEOUT;
+    }
+
+    /**
      * Logout a user by unsetting all login information
      *
      * See:
@@ -124,4 +139,41 @@ class SessionManager
         }
         setcookie(self::$LOGGED_IN_COOKIE, 'false', 0, $webPath);
     }
+
+    /**
+     * Check whether the session has expired
+     *
+     * @param string $clientIpId Client IP address identifier
+     *
+     * @return bool true if the session has expired, false otherwise
+     */
+    public function hasSessionExpired()
+    {
+        if (empty($this->session['uid'])) {
+            return true;
+        }
+        if (time() >= $this->session['expires_on']) {
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Check whether the client IP address has changed
+     *
+     * @param string $clientIpId Client IP address identifier
+     *
+     * @return bool true if the IP has changed, false if it has not, or
+     *              if session protection has been disabled
+     */
+    public function hasClientIpChanged($clientIpId)
+    {
+        if ($this->conf->get('security.session_protection_disabled') === true) {
+            return false;
+        }
+        if ($this->session['ip'] == $clientIpId) {
+            return false;
+        }
+        return true;
+    }
 }