Authentication backends refactoring

1 files changed, 150 insertions, 0 deletions

diff --git a/app/Auth/Ldap.php b/app/Auth/Ldap.php
new file mode 100644
index 00000000..bb17653d
--- /dev/null
+++ b/app/Auth/Ldap.php
@@ -0,0 +1,150 @@
+<?php
+
+namespace Auth;
+
+/**
+ * LDAP model
+ *
+ * @package  auth
+ * @author   Frederic Guillot
+ */
+class Ldap extends Base
+{
+    /**
+     * Backend name
+     *
+     * @var string
+     */
+    const AUTH_NAME = 'LDAP';
+
+    /**
+     * Authenticate the user
+     *
+     * @access public
+     * @param  string  $username  Username
+     * @param  string  $password  Password
+     * @return boolean
+     */
+    public function authenticate($username, $password)
+    {
+        $result = $this->findUser($username, $password);
+
+        if (is_array($result)) {
+
+            $user = $this->user->getByUsername($username);
+
+            if ($user) {
+
+                // There is already a local user with that name
+                if ($user['is_ldap_user'] == 0) {
+                    return false;
+                }
+            }
+            else {
+
+                // We create automatically a new user
+                if ($this->createUser($username, $result['name'], $result['email'])) {
+                    $user = $this->user->getByUsername($username);
+                }
+                else {
+                    return false;
+                }
+            }
+
+            // We open the session
+            $this->user->updateSession($user);
+
+            // Update login history
+            $this->lastLogin->create(
+                self::AUTH_NAME,
+                $user['id'],
+                $this->user->getIpAddress(),
+                $this->user->getUserAgent()
+            );
+
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Find the user from the LDAP server
+     *
+     * @access public
+     * @param  string  $username  Username
+     * @param  string  $password  Password
+     * @return boolean|array
+     */
+    public function findUser($username, $password)
+    {
+        if (! function_exists('ldap_connect')) {
+            die('The PHP LDAP extension is required');
+        }
+
+        // Skip SSL certificate verification
+        if (! LDAP_SSL_VERIFY) {
+            putenv('LDAPTLS_REQCERT=never');
+        }
+
+        $ldap = ldap_connect(LDAP_SERVER, LDAP_PORT);
+
+        if (! is_resource($ldap)) {
+            die('Unable to connect to the LDAP server: "'.LDAP_SERVER.'"');
+        }
+
+        ldap_set_option($ldap, LDAP_OPT_PROTOCOL_VERSION, 3);
+        ldap_set_option($ldap, LDAP_OPT_REFERRALS, 0);
+
+        if (! @ldap_bind($ldap, LDAP_USERNAME, LDAP_PASSWORD)) {
+            die('Unable to bind to the LDAP server: "'.LDAP_SERVER.'"');
+        }
+
+        $sr = @ldap_search($ldap, LDAP_ACCOUNT_BASE, sprintf(LDAP_USER_PATTERN, $username), array(LDAP_ACCOUNT_FULLNAME, LDAP_ACCOUNT_EMAIL));
+
+        if ($sr === false) {
+            return false;
+        }
+
+        $info = ldap_get_entries($ldap, $sr);
+
+        // User not found
+        if (count($info) == 0 || $info['count'] == 0) {
+            return false;
+        }
+
+        // We got our user
+        if (@ldap_bind($ldap, $info[0]['dn'], $password)) {
+
+            return array(
+                'username' => $username,
+                'name' => isset($info[0][LDAP_ACCOUNT_FULLNAME][0]) ? $info[0][LDAP_ACCOUNT_FULLNAME][0] : '',
+                'email' => isset($info[0][LDAP_ACCOUNT_EMAIL][0]) ? $info[0][LDAP_ACCOUNT_EMAIL][0] : '',
+            );
+        }
+
+        return false;
+    }
+
+    /**
+     * Create a new local user after the LDAP authentication
+     *
+     * @access public
+     * @param  string  $username    Username
+     * @param  string  $name        Name of the user
+     * @param  string  $email       Email address
+     * @return bool
+     */
+    public function createUser($username, $name, $email)
+    {
+        $values = array(
+            'username' => $username,
+            'name' => $name,
+            'email' => $email,
+            'is_admin' => 0,
+            'is_ldap_user' => 1,
+        );
+
+        return $this->user->create($values);
+    }
+}