API: Auth implementation

rcc/api/auth/DigestAuth.php

@@ -0,0 +1,52 @@
+<?php
+/**
+ * PHP Version 7
+ *
+ * Authentication Helper Class
+ *
+ * @category Authentication
+ * @package  Rbe
+ * @author   Marcel Kapfer (mmk2410) <marcelmichaelkapfer@yahoo.co.nz>
+ * @license  MIT License
+ * @link     http://marcel-kapfer.de/rangitaki
+ */
+namespace mmk2410\rbe\digestAuth;
+
+/**
+ * PHP Version 7
+ *
+ * Authentication Helper Class
+ *
+ * @category Authentication
+ * @package  Rbe
+ * @author   Marcel Kapfer (mmk2410) <marcelmichaelkapfer@yahoo.co.nz>
+ * @license  MIT License
+ * @link     http://marcel-kapfer.de/rangitaki
+ */
+class DigestAuth
+{
+
+    /**
+     * parser for http digest
+     *
+     * @param $txt  data to parse
+     *
+     * @return parsed data or FALSE
+     */
+    public function httpDigestParse($txt)
+    {
+        // protect against missing data
+        $needed_parts = array('nonce'=>1, 'nc'=>1, 'cnonce'=>1, 'qop'=>1, 'username'=>1, 'uri'=>1, 'response'=>1);
+        $data = array();
+        $keys = implode('|', array_keys($needed_parts));
+
+        preg_match_all('@(' . $keys . ')=(?:([\'"])([^\2]+?)\2|([^\s,]+))@', $txt, $matches, PREG_SET_ORDER);
+
+        foreach ($matches as $m) {
+            $data[$m[1]] = $m[3] ? $m[3] : $m[4];
+            unset($needed_parts[$m[1]]);
+        }
+
+        return $needed_parts ? false : $data;
+    }
+}

rcc/api/auth/auth.php

@@ -0,0 +1,38 @@
+<?php
+// Marcel Kapfer (mmk2410)
+// License: MIT License
+// api digest auth
+
+require 'DigestAuth.php';
+
+use \mmk2410\rbe\digestAuth\DigestAuth as DigestAuth;
+
+$realm = 'Restricted area';
+
+//user => password
+$users = array('admin' => 'mypass', 'guest' => 'guest');
+
+if (empty($_SERVER['PHP_AUTH_DIGEST'])) {
+    header('HTTP/1.1 401 Unauthorized');
+    header('WWW-Authenticate: Digest realm="'.$realm.
+           '",qop="auth",nonce="'.uniqid().'",opaque="'.md5($realm).'"');
+
+    die('Access to RCC API not granted');
+}
+
+
+// analyze the PHP_AUTH_DIGEST variable
+if (!($data = DigestAuth::httpDigestParse($_SERVER['PHP_AUTH_DIGEST'])) ||
+    !isset($users[$data['username']])) {
+    die('Wrong Credentials!');
+}
+
+
+// generate the valid response
+$A1 = md5($data['username'] . ':' . $realm . ':' . $users[$data['username']]);
+$A2 = md5($_SERVER['REQUEST_METHOD'].':'.$data['uri']);
+$valid_response = md5($A1.':'.$data['nonce'].':'.$data['nc'].':'.$data['cnonce'].':'.$data['qop'].':'.$A2);
+
+if ($data['response'] != $valid_response) {
+    die('Wrong Credentials!');
+}

rcc/api/list/index.php

@@ -9,6 +9,8 @@ use \Psr\Http\Message\ResponseInterface as Response;
 require '../../../vendor/autoload.php';
 require '../../../res/php/Config.php';
 
+include '../auth/auth.php';
+
 use \mmk2410\rbe\config\Config as Config;
 
 $config = new Config("../../../config.yaml", '../../../vendor/autoload.php');

rcc/api/media/index.php

@@ -10,6 +10,8 @@ require '../../../vendor/autoload.php';
 require '../../../res/php/Config.php';
 require '../../../res/php/ArticleGenerator.php';
 
+include '../auth/auth.php';
+
 use \mmk2410\rbe\config\Config as Config;
 
 $config = new Config("../../../config.yaml", '../../../vendor/autoload.php');

rcc/api/post/index.php

@@ -10,6 +10,8 @@ require '../../../vendor/autoload.php';
 require '../../../res/php/Config.php';
 require '../../../res/php/ArticleGenerator.php';
 
+include '../auth/auth.php';
+
 use \mmk2410\rbe\config\Config as Config;
 
 $config = new Config("../../../config.yaml", '../../../vendor/autoload.php');