2 files changed, 159 insertions, 0 deletions

diff --git a/application/front/controller/admin/PasswordController.php b/application/front/controller/admin/PasswordController.php
new file mode 100644
index 00000000..6e8f0bcb
--- /dev/null
+++ b/application/front/controller/admin/PasswordController.php
@@ -0,0 +1,100 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shaarli\Front\Controller\Admin;
+
+use Shaarli\Container\ShaarliContainer;
+use Shaarli\Front\Exception\OpenShaarliPasswordException;
+use Shaarli\Front\Exception\ShaarliFrontException;
+use Slim\Http\Request;
+use Slim\Http\Response;
+use Throwable;
+
+/**
+ * Class PasswordController
+ *
+ * Slim controller used to handle passwords update.
+ */
+class PasswordController extends ShaarliAdminController
+{
+    public function __construct(ShaarliContainer $container)
+    {
+        parent::__construct($container);
+
+        $this->assignView(
+            'pagetitle',
+            t('Change password') .' - '. $this->container->conf->get('general.title', 'Shaarli')
+        );
+    }
+
+    /**
+     * GET /password - Displays the change password template
+     */
+    public function index(Request $request, Response $response): Response
+    {
+        return $response->write($this->render('changepassword'));
+    }
+
+    /**
+     * POST /password - Change admin password - existing and new passwords need to be provided.
+     */
+    public function change(Request $request, Response $response): Response
+    {
+        $this->checkToken($request);
+
+        if ($this->container->conf->get('security.open_shaarli', false)) {
+            throw new OpenShaarliPasswordException();
+        }
+
+        $oldPassword = $request->getParam('oldpassword');
+        $newPassword = $request->getParam('setpassword');
+
+        if (empty($newPassword) || empty($oldPassword)) {
+            $this->saveErrorMessage(t('You must provide the current and new password to change it.'));
+
+            return $response
+                ->withStatus(400)
+                ->write($this->render('changepassword'))
+            ;
+        }
+
+        // Make sure old password is correct.
+        $oldHash = sha1(
+            $oldPassword .
+            $this->container->conf->get('credentials.login') .
+            $this->container->conf->get('credentials.salt')
+        );
+
+        if ($oldHash !== $this->container->conf->get('credentials.hash')) {
+            $this->saveErrorMessage(t('The old password is not correct.'));
+
+            return $response
+                ->withStatus(400)
+                ->write($this->render('changepassword'))
+            ;
+        }
+
+        // Save new password
+        // Salt renders rainbow-tables attacks useless.
+        $this->container->conf->set('credentials.salt', sha1(uniqid('', true) .'_'. mt_rand()));
+        $this->container->conf->set(
+            'credentials.hash',
+            sha1(
+                $newPassword
+                . $this->container->conf->get('credentials.login')
+                . $this->container->conf->get('credentials.salt')
+            )
+        );
+
+        try {
+            $this->container->conf->write($this->container->loginManager->isLoggedIn());
+        } catch (Throwable $e) {
+            throw new ShaarliFrontException($e->getMessage(), 500, $e);
+        }
+
+        $this->saveSuccessMessage(t('Your password has been changed'));
+
+        return $response->write($this->render('changepassword'));
+    }
+}
diff --git a/application/front/controller/admin/ShaarliAdminController.php b/application/front/controller/admin/ShaarliAdminController.php
index ea703f62..3385006c 100644
--- a/application/front/controller/admin/ShaarliAdminController.php
+++ b/application/front/controller/admin/ShaarliAdminController.php
@@ -7,7 +7,19 @@ namespace Shaarli\Front\Controller\Admin;
 use Shaarli\Container\ShaarliContainer;
 use Shaarli\Front\Controller\Visitor\ShaarliVisitorController;
 use Shaarli\Front\Exception\UnauthorizedException;
+use Shaarli\Front\Exception\WrongTokenException;
+use Shaarli\Security\SessionManager;
+use Slim\Http\Request;
 
+/**
+ * Class ShaarliAdminController
+ *
+ * All admin controllers (for logged in users) MUST extend this abstract class.
+ * It makes sure that the user is properly logged in, and otherwise throw an exception
+ * which will redirect to the login page.
+ *
+ * @package Shaarli\Front\Controller\Admin
+ */
 abstract class ShaarliAdminController extends ShaarliVisitorController
 {
     public function __construct(ShaarliContainer $container)
@@ -18,4 +30,51 @@ abstract class ShaarliAdminController extends ShaarliVisitorController
             throw new UnauthorizedException();
         }
     }
+
+    /**
+     * Any persistent action to the config or data store must check the XSRF token validity.
+     */
+    protected function checkToken(Request $request): void
+    {
+        if (!$this->container->sessionManager->checkToken($request->getParam('token'))) {
+            throw new WrongTokenException();
+        }
+    }
+
+    /**
+     * Save a SUCCESS message in user session, which will be displayed on any template page.
+     */
+    protected function saveSuccessMessage(string $message): void
+    {
+        $this->saveMessage(SessionManager::KEY_SUCCESS_MESSAGES, $message);
+    }
+
+    /**
+     * Save a WARNING message in user session, which will be displayed on any template page.
+     */
+    protected function saveWarningMessage(string $message): void
+    {
+        $this->saveMessage(SessionManager::KEY_WARNING_MESSAGES, $message);
+    }
+
+    /**
+     * Save an ERROR message in user session, which will be displayed on any template page.
+     */
+    protected function saveErrorMessage(string $message): void
+    {
+        $this->saveMessage(SessionManager::KEY_ERROR_MESSAGES, $message);
+    }
+
+    /**
+     * Use the sessionManager to save the provided message using the proper type.
+     *
+     * @param string $type successed/warnings/errors
+     */
+    protected function saveMessage(string $type, string $message): void
+    {
+        $messages = $this->container->sessionManager->getSessionParameter($type) ?? [];
+        $messages[] = $message;
+
+        $this->container->sessionManager->setSessionParameter($type, $messages);
+    }
 }