Resolve backend Qodana critical and high findings (#314)

Resolve recommended-profile Critical and High findings, retain narrow analyzer exceptions, and update the edge-broker WebSocket dependency to a non-vulnerable release.

services/nginx/app/classes/entra.php

@@ -5,9 +5,6 @@ namespace classes;
 require_once WD . '/modules/entra/entra_c.php';
 
 use entra\entra_c;
-use Microsoft\Graph\GraphServiceClient;
-use Microsoft\Kiota\Authentication\Oauth\ClientCredentialContext;
-use Microsoft\Kiota\Authentication\Oauth\ClientCredentialContextBuilder;
 
 
 class entra
@@ -23,42 +20,95 @@ class entra
         $this->config = new entra_c();
     }
 
-    public function get_users($array = false): array|object
+    public function get_users(bool $array = false): array
     {
-        $graphClient = $this->getGraphClient();
-
-        $users = $graphClient->users()
-            ->get()
-            ->wait()
-            ->getValue();
+        $accessToken = $this->requestAccessToken();
+        $usersResponse = $this->requestJson(
+            'https://graph.microsoft.com/v1.0/users?$select=id,displayName,mail,userPrincipalName',
+            ['Authorization: Bearer ' . $accessToken]
+        );
+        $users = is_array($usersResponse['value'] ?? null) ? $usersResponse['value'] : [];
         if (!$array) {
             return $users;
         }
+
         $result = [];
-        foreach ( $users as $user ) {
+        foreach ($users as $user) {
+            if (!is_array($user)) {
+                continue;
+            }
             $result[] = [
-                'id' => $user->getId(),
-                'displayName' => $user->getDisplayName(),
-                'mail' => $user->getMail(),
-                'userPrincipalName' => $user->getUserPrincipalName(),
+                'id' => $user['id'] ?? null,
+                'displayName' => $user['displayName'] ?? null,
+                'mail' => $user['mail'] ?? null,
+                'userPrincipalName' => $user['userPrincipalName'] ?? null,
             ];
         }
         return $result;
     }
 
-    public function getGraphClient(): GraphServiceClient
+    private function requestAccessToken(): string
     {
-        return new GraphServiceClient(
-            $this->getTokenRequestContext(),
+        $tenantId = trim((string)$this->config->tenant_id->getVariableValue());
+        $response = $this->requestJson(
+            'https://login.microsoftonline.com/' . rawurlencode($tenantId) . '/oauth2/v2.0/token',
+            ['Content-Type: application/x-www-form-urlencoded'],
+            http_build_query([
+                'client_id' => (string)$this->config->client_id->getVariableValue(),
+                'client_secret' => (string)$this->config->client_secret->getVariableValue(),
+                'scope' => 'https://graph.microsoft.com/.default',
+                'grant_type' => 'client_credentials',
+            ])
         );
+
+        $token = trim((string)($response['access_token'] ?? ''));
+        if ($token === '') {
+            throw new \RuntimeException('Microsoft Entra token response did not contain an access token.');
+        }
+
+        return $token;
     }
 
-    public function getTokenRequestContext(): ClientCredentialContext
+    /**
+     * @param list<string> $headers
+     * @return array<string,mixed>
+     */
+    private function requestJson(string $url, array $headers, ?string $postFields = null): array
     {
-        return new ClientCredentialContext(
-            $this->config->tenant_id->getVariableValue(),
-            $this->config->client_id->getVariableValue(),
-            $this->config->client_secret->getVariableValue()
-        );
+        $curl = curl_init($url);
+        if ($curl === false) {
+            throw new \RuntimeException('Unable to initialize Microsoft Entra request.');
+        }
+
+        curl_setopt_array($curl, [
+            CURLOPT_RETURNTRANSFER => true,
+            CURLOPT_CONNECTTIMEOUT => 5,
+            CURLOPT_TIMEOUT => 20,
+            CURLOPT_HTTPHEADER => $headers,
+        ]);
+        if ($postFields !== null) {
+            curl_setopt($curl, CURLOPT_POST, true);
+            curl_setopt($curl, CURLOPT_POSTFIELDS, $postFields);
+        }
+
+        try {
+            $body = curl_exec($curl);
+            $status = (int)curl_getinfo($curl, CURLINFO_RESPONSE_CODE);
+            if ($body === false) {
+                throw new \RuntimeException('Microsoft Entra request failed: ' . curl_error($curl));
+            }
+        } finally {
+            curl_close($curl);
+        }
+
+        $decoded = json_decode((string)$body, true);
+        if ($status < 200 || $status >= 300 || !is_array($decoded)) {
+            $message = is_array($decoded)
+                ? (string)($decoded['error_description'] ?? $decoded['error']['message'] ?? 'Unexpected response')
+                : 'Invalid JSON response';
+            throw new \RuntimeException('Microsoft Entra request failed with HTTP ' . $status . ': ' . $message);
+        }
+
+        return $decoded;
     }
-}
+}