Files
InvoiceShelf/app/Support/ExchangeRate/CurrencyConverterDriver.php
Darko Gjorgjijoski ac2a8ca939 fix(security): gate AI tools by user ability and block admin-URL SSRF
The AI chat assistant scoped tool queries by company but ignored the
per-user Bouncer abilities the rest of the app enforces, so any `use ai`
holder could read customers, invoices, payments, and company financials
their role couldn't otherwise see. Each AiTool now declares a required
ability (entity-aligned); the registry hides unauthorized tools from the
model and refuses to execute them as a backstop.

Separately, admin/owner-supplied URLs were fetched server-side with no
guard against private/reserved targets (SSRF): the AI base URL, the
CurrencyConverter "DEDICATED" exchange-rate URL, and S3/Spaces file-disk
endpoints. A shared PrivateNetworkGuard now backs a PublicHttpUrl
validation rule (save-time) and runtime guards in each driver.

- AiTool::requiredAbility() + mapping across all 12 tools
- AiToolRegistry filters schemas() by ability and re-checks in execute()
- PrivateNetworkGuard / BlockedUrlException / PublicHttpUrl rule (new)
- Rule wired into AI config (service + 3 controllers), exchange-rate,
  and file-disk endpoints; runtime guards in OpenRouterDriver,
  CurrencyConverterDriver, and FileDiskService
- Tests for ability filtering, the guard, the rule, and 422 rejections
2026-06-05 00:01:09 +02:00

69 lines
2.1 KiB
PHP

<?php
namespace App\Support\ExchangeRate;
use App\Support\Net\BlockedUrlException;
use App\Support\Net\PrivateNetworkGuard;
use Illuminate\Support\Facades\Http;
class CurrencyConverterDriver extends ExchangeRateDriver
{
public function getExchangeRate(string $baseCurrency, string $targetCurrency): array
{
$baseUrl = $this->getBaseUrl();
$query = "{$baseCurrency}_{$targetCurrency}";
$url = "{$baseUrl}/api/v7/convert?apiKey={$this->apiKey}&q={$query}&compact=y";
$response = Http::get($url)->json();
return array_values($response[$query]);
}
public function getSupportedCurrencies(): array
{
$baseUrl = $this->getBaseUrl();
$url = "{$baseUrl}/api/v7/currencies?apiKey={$this->apiKey}";
$response = Http::get($url)->json();
if ($response == null) {
throw new ExchangeRateException('Server not responding', 'server_error');
}
if (array_key_exists('results', $response)) {
return array_keys($response['results']);
}
throw new ExchangeRateException('Please Enter Valid Provider Key.', 'invalid_key');
}
public function validateConnection(): array
{
$baseUrl = $this->getBaseUrl();
$query = 'INR_USD';
$url = "{$baseUrl}/api/v7/convert?apiKey={$this->apiKey}&q={$query}&compact=y";
$response = Http::get($url)->json();
return array_values($response[$query]);
}
private function getBaseUrl(): string
{
$type = $this->config['type'] ?? 'FREE';
$url = match ($type) {
'PREMIUM' => 'https://api.currconv.com',
'PREPAID' => 'https://prepaid.currconv.com',
'FREE' => 'https://free.currconv.com',
'DEDICATED' => $this->config['url'] ?? 'https://free.currconv.com',
};
// SSRF guard: the DEDICATED plan lets the user supply this URL.
try {
PrivateNetworkGuard::assertAllowed($url);
} catch (BlockedUrlException $e) {
throw new ExchangeRateException('Invalid provider URL: '.$e->getMessage(), 'invalid_url');
}
return $url;
}
}