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Проверка подписи запроса для приложений в вк

vk.com/dev/vk_apps_docs2

vk.com/dev/community_apps_docs (устаревшее приложения сообщества)

composer require stels-cs/php-vk-sign-checker

Проверка подписи VkApps

$secret = "rkwdOT04kUh28RDEC9zr";
$request = "?vk_access_token_settings=friends%2Cgroups&vk_app_id=6825462&vk_are_notifications_enabled=0&vk_is_app_user=1&vk_language=ru&vk_platform=desktop_web&vk_user_id=19039187&sign=vBBPIysvzccFUn_e55JCGxZBnmxpXeh92XpiAY9gcv8";

$ok = VkAppSign\Checker::checkVkAppsSign($request, $secret);
if ($ok) {
//подпись валидна запрос не изменен
} else {
//ОИШИБКА, запрос был изменен или неверный $appSecret
}

Проверка подписи Приложения сообщества (устаревшее)

$request = "?api_url=https://api.vk.com/api.php&api_id=6196804&api_settings=1&viewer_id=19039187&viewer_type=0&sid=e211a8bf9bad808a2a95d75721071b874ba82d07a8b0b6aaeb98f2d220deca8fd591c89a2dca1c6165b8e&secret=9c3f105f93&access_token=064affc04d119ad5798e9e8e2b24012fcad249be99712151047532d53f2dd107f24195f6d7309bceb0274&user_id=0&is_app_user=1&auth_key=7eb1471c6341ba56ff0c0dad0f8dba6b&language=0&parent_language=0&is_secure=1&ads_app_id=6196804_e7d36e80a3155f8eb0&referrer=unknown&lc_name=abe9e425&sign=17b0427e7a43f60d081487c36170ff6d052516d06341457668391a22fd7732c1&hash=";
$appSecret = 'UURSsxO59uTyHVvSzHgW';
$ok = VkAppSign\Checker::checkString($request, $appSecret);
if ($ok) {
//подпись валидна запрос не изменен
} else {
//ОИШИБКА, запрос был изменен или неверный $appSecret
}

Рассчет подписи для платежей VkPay

$data = [
    'order_id' => 555,
    'ts' => time(),
];

$amount = 100;

$merchantId = 5556677; //Fake
$secret = 'DervCzxvwetgtvDFSGesrtbsrtbsvesr'; //Fake
$description = "TestPay";
$params = \VkAppSign\Checker::vkPayToService($merchantId, $amount, $description, $data, $secret);

$params //надо передать в openExternalApp на стороне клиента

//Дебаг
$ss = json_encode($params, JSON_UNESCAPED_UNICODE);
$tmp = "VK.callMethod(\"openExternalApp\", \"vkpay\", {$ss})";
echo $tmp; //

Пример Request для Laravel

<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;
use VkAppSign\Checker;

class SignRequest extends FormRequest
{
    public $groupId;
    public $viewerType;
    public $userId;
    public $appId;
    public $hash;
    public $isAppUser = false;
    public $areNotificationsEnabled = false;
    public $accessTokenSettings = '';
    public $language = '';
    public $viewerGroupRole = '';
    public $platform = '';
    public $sign = '';


    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        $url = $this->header('X-vk-sign', $this->header('x-vk-sign', ''));
        $launchParameters = $this->parseLaunchParametersUrl($url);

        $secret = config('app.vk_app_secret');


        $areParametersValid = Checker::checkVkAppsParams($launchParameters, $secret);
        if (!$areParametersValid) {
            return false;
        }


        $this->viewerType = 0;
        $this->hash = (string)($launchParameters['hash'] ?? '');

        if (isset($launchParameters['vk_user_id'])) {
            $this->userId = (int)$launchParameters['vk_user_id'];
        }

        if (isset($launchParameters['vk_app_id'])) {
            $this->appId = (int)$launchParameters['vk_app_id'];
        }
        if (isset($launchParameters['vk_is_app_user'])) {
            if ((int)$launchParameters['vk_is_app_user'] === 1) {
                $this->isAppUser = true;
            } else {
                $this->isAppUser = false;
            }
        }
        if (isset($launchParameters['vk_are_notifications_enabled'])) {
            if ((int)$launchParameters['vk_are_notifications_enabled'] === 1) {
                $this->areNotificationsEnabled = true;
            } else {
                $this->areNotificationsEnabled = false;
            }
        }
        if (isset($launchParameters['vk_language'])) {
            $this->language = (string)$launchParameters['vk_language'];
        }
        if (isset($launchParameters['vk_access_token_settings'])) {
            $this->accessTokenSettings = (string)$launchParameters['vk_access_token_settings'];
        }
        if (isset($launchParameters['vk_group_id'])) {
            $this->groupId = (int)$launchParameters['vk_group_id'];
        }
        if (isset($launchParameters['vk_viewer_group_role'])) {
            $this->viewerGroupRole = (string)$launchParameters['vk_viewer_group_role'];
        }
        if (isset($launchParameters['vk_platform'])) {
            $this->platform = (string)$launchParameters['vk_platform'];
        }
        if (isset($launchParameters['sign'])) {
            $this->sign = (string)$launchParameters['sign'];
        }

        return true;
    }

    public function parseLaunchParametersUrl($url)
    {
        $query = preg_replace('/^\?/usi', '', $url);
        $params = [];
        parse_str($query, $params);
        return $params;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        return [
            //
        ];
    }

    public function int($key, $def = 0): int
    {
        return (int)$this->get($key, $def);
    }

    public function string($key, $def = '')
    {
        return trim((string)$this->get($key, $def));
    }

    public function str($key, $def, $max)
    {
        $str = $this->string($key, $def);
        return mb_substr($str, 0, $max);
    }
}

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