From d91691573f108422cc2080462af35ebd62dc93fb Mon Sep 17 00:00:00 2001
From: Jeremy <jeremy.benoist@gmail.com>
Date: Sun, 8 Feb 2015 21:47:36 +0100
Subject: Add custom auth encoder & provider

These custom classes allow Wallabag v2 to be compatible with Wallabag v1 salted password
---
 src/Wallabag/CoreBundle/Entity/User.php            |  6 +-
 .../Encoder/WallabagPasswordEncoder.php            | 88 +++++++++++++++++++++
 .../Provider/WallabagAuthenticationProvider.php    | 89 ++++++++++++++++++++++
 3 files changed, 182 insertions(+), 1 deletion(-)
 create mode 100644 src/Wallabag/CoreBundle/Security/Authentication/Encoder/WallabagPasswordEncoder.php
 create mode 100644 src/Wallabag/CoreBundle/Security/Authentication/Provider/WallabagAuthenticationProvider.php

(limited to 'src/Wallabag')

diff --git a/src/Wallabag/CoreBundle/Entity/User.php b/src/Wallabag/CoreBundle/Entity/User.php
index cfbd57f8..c83250c3 100644
--- a/src/Wallabag/CoreBundle/Entity/User.php
+++ b/src/Wallabag/CoreBundle/Entity/User.php
@@ -161,7 +161,11 @@ class User implements AdvancedUserInterface, \Serializable
      */
     public function setPassword($password)
     {
-        $this->password = $password;
+        if (!$password && 0 === strlen($password)) {
+            return;
+        }
+
+        $this->password = sha1($password.$this->getUsername().$this->getSalt());
 
         return $this;
     }
diff --git a/src/Wallabag/CoreBundle/Security/Authentication/Encoder/WallabagPasswordEncoder.php b/src/Wallabag/CoreBundle/Security/Authentication/Encoder/WallabagPasswordEncoder.php
new file mode 100644
index 00000000..56f1affe
--- /dev/null
+++ b/src/Wallabag/CoreBundle/Security/Authentication/Encoder/WallabagPasswordEncoder.php
@@ -0,0 +1,88 @@
+<?php
+
+namespace Wallabag\CoreBundle\Security\Authentication\Encoder;
+
+use Symfony\Component\Security\Core\Encoder\BasePasswordEncoder;
+use Symfony\Component\Security\Core\Exception\BadCredentialsException;
+
+/**
+ * This override just add en extra variable (username) to be able to salt the password
+ * the way Wallabag v1 does. It will avoid to break compatibility with Wallabag v1
+ *
+ */
+class WallabagPasswordEncoder extends BasePasswordEncoder
+{
+    private $algorithm;
+    private $encodeHashAsBase64;
+    private $iterations;
+    private $username = null;
+
+    /**
+     * Constructor.
+     *
+     * @param string $algorithm          The digest algorithm to use
+     * @param bool   $encodeHashAsBase64 Whether to base64 encode the password hash
+     * @param int    $iterations         The number of iterations to use to stretch the password hash
+     */
+    public function __construct($algorithm = 'sha512', $encodeHashAsBase64 = true, $iterations = 5000)
+    {
+        $this->algorithm = $algorithm;
+        $this->encodeHashAsBase64 = $encodeHashAsBase64;
+        $this->iterations = $iterations;
+    }
+
+    public function setUsername($username)
+    {
+        $this->username = $username;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function encodePassword($raw, $salt)
+    {
+        if (null === $this->username) {
+            throw new \LogicException('We can not check the password without a username.');
+        }
+
+        if ($this->isPasswordTooLong($raw)) {
+            throw new BadCredentialsException('Invalid password.');
+        }
+
+        if (!in_array($this->algorithm, hash_algos(), true)) {
+            throw new \LogicException(sprintf('The algorithm "%s" is not supported.', $this->algorithm));
+        }
+
+        $salted = $this->mergePasswordAndSalt($raw, $salt);
+        $digest = hash($this->algorithm, $salted, true);
+
+        // "stretch" hash
+        for ($i = 1; $i < $this->iterations; $i++) {
+            $digest = hash($this->algorithm, $digest.$salted, true);
+        }
+
+        return $this->encodeHashAsBase64 ? base64_encode($digest) : bin2hex($digest);
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * We inject the username inside the salted password
+     */
+    protected function mergePasswordAndSalt($password, $salt)
+    {
+        if (empty($salt)) {
+            return $password;
+        }
+
+        return $password.$this->username.$salt;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isPasswordValid($encoded, $raw, $salt)
+    {
+        return !$this->isPasswordTooLong($raw) && $this->comparePasswords($encoded, $this->encodePassword($raw, $salt));
+    }
+}
diff --git a/src/Wallabag/CoreBundle/Security/Authentication/Provider/WallabagAuthenticationProvider.php b/src/Wallabag/CoreBundle/Security/Authentication/Provider/WallabagAuthenticationProvider.php
new file mode 100644
index 00000000..1c7c5fae
--- /dev/null
+++ b/src/Wallabag/CoreBundle/Security/Authentication/Provider/WallabagAuthenticationProvider.php
@@ -0,0 +1,89 @@
+<?php
+
+namespace Wallabag\CoreBundle\Security\Authentication\Provider;
+
+use Symfony\Component\Security\Core\Encoder\EncoderFactoryInterface;
+use Symfony\Component\Security\Core\User\UserProviderInterface;
+use Symfony\Component\Security\Core\User\UserCheckerInterface;
+use Symfony\Component\Security\Core\User\UserInterface;
+use Symfony\Component\Security\Core\Exception\UsernameNotFoundException;
+use Symfony\Component\Security\Core\Exception\AuthenticationServiceException;
+use Symfony\Component\Security\Core\Exception\BadCredentialsException;
+use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
+use Symfony\Component\Security\Core\Authentication\Provider\UserAuthenticationProvider;
+
+class WallabagAuthenticationProvider extends UserAuthenticationProvider
+{
+    private $encoderFactory;
+    private $userProvider;
+
+    /**
+     * Constructor.
+     *
+     * @param UserProviderInterface   $userProvider               An UserProviderInterface instance
+     * @param UserCheckerInterface    $userChecker                An UserCheckerInterface instance
+     * @param string                  $providerKey                The provider key
+     * @param EncoderFactoryInterface $encoderFactory             An EncoderFactoryInterface instance
+     * @param bool                    $hideUserNotFoundExceptions Whether to hide user not found exception or not
+     */
+    public function __construct(UserProviderInterface $userProvider, UserCheckerInterface $userChecker, $providerKey, EncoderFactoryInterface $encoderFactory, $hideUserNotFoundExceptions = true)
+    {
+        parent::__construct($userChecker, $providerKey, $hideUserNotFoundExceptions);
+
+        $this->encoderFactory = $encoderFactory;
+        $this->userProvider = $userProvider;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function checkAuthentication(UserInterface $user, UsernamePasswordToken $token)
+    {
+        $currentUser = $token->getUser();
+        if ($currentUser instanceof UserInterface) {
+            if ($currentUser->getPassword() !== $user->getPassword()) {
+                throw new BadCredentialsException('The credentials were changed from another session.');
+            }
+        } else {
+            if ("" === ($presentedPassword = $token->getCredentials())) {
+                throw new BadCredentialsException('The presented password cannot be empty.');
+            }
+
+            // give username, it's used to hash the password
+            $encoder = $this->encoderFactory->getEncoder($user);
+            $encoder->setUsername($user->getUsername());
+
+            if (!$encoder->isPasswordValid($user->getPassword(), $presentedPassword, $user->getSalt())) {
+                throw new BadCredentialsException('The presented password is invalid.');
+            }
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function retrieveUser($username, UsernamePasswordToken $token)
+    {
+        $user = $token->getUser();
+        if ($user instanceof UserInterface) {
+            return $user;
+        }
+
+        try {
+            $user = $this->userProvider->loadUserByUsername($username);
+
+            if (!$user instanceof UserInterface) {
+                throw new AuthenticationServiceException('The user provider must return a UserInterface object.');
+            }
+
+            return $user;
+        } catch (UsernameNotFoundException $notFound) {
+            $notFound->setUsername($username);
+            throw $notFound;
+        } catch (\Exception $repositoryProblem) {
+            $ex = new AuthenticationServiceException($repositoryProblem->getMessage(), 0, $repositoryProblem);
+            $ex->setToken($token);
+            throw $ex;
+        }
+    }
+}
-- 
cgit v1.2.3