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zeyudada/check_authorization.php

Forked from anonymous/check_authorization.php
Created December 16, 2021 11:47
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  1. @invalid-email-address Anonymous created this gist Feb 3, 2018.
    40 changes: 40 additions & 0 deletions check_authorization.php
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    <?php

    define('BOT_TOKEN', 'XXXXXXXX:XXXXXXXXXXXXXXXXXXXXXXXX'); // place bot token of your bot here

    function checkTelegramAuthorization($auth_data) {
    $check_hash = $auth_data['hash'];
    unset($auth_data['hash']);
    $data_check_arr = [];
    foreach ($auth_data as $key => $value) {
    $data_check_arr[] = $key . '=' . $value;
    }
    sort($data_check_arr);
    $data_check_string = implode("\n", $data_check_arr);
    $secret_key = hash('sha256', BOT_TOKEN, true);
    $hash = hash_hmac('sha256', $data_check_string, $secret_key);
    if (strcmp($hash, $check_hash) !== 0) {
    throw new Exception('Data is NOT from Telegram');
    }
    if ((time() - $auth_data['auth_date']) > 86400) {
    throw new Exception('Data is outdated');
    }
    return $auth_data;
    }

    function saveTelegramUserData($auth_data) {
    $auth_data_json = json_encode($auth_data);
    setcookie('tg_user', $auth_data_json);
    }


    try {
    $auth_data = checkTelegramAuthorization($_GET);
    saveTelegramUserData($auth_data);
    } catch (Exception $e) {
    die ($e->getMessage());
    }

    header('Location: login_example.php');

    ?>
    54 changes: 54 additions & 0 deletions login_example.php
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    <?php

    define('BOT_USERNAME', 'XXXXXXXXXX'); // place username of your bot here

    function getTelegramUserData() {
    if (isset($_COOKIE['tg_user'])) {
    $auth_data_json = urldecode($_COOKIE['tg_user']);
    $auth_data = json_decode($auth_data_json, true);
    return $auth_data;
    }
    return false;
    }

    if ($_GET['logout']) {
    setcookie('tg_user', '');
    header('Location: login_example.php');
    }

    $tg_user = getTelegramUserData();
    if ($tg_user !== false) {
    $first_name = htmlspecialchars($tg_user['first_name']);
    $last_name = htmlspecialchars($tg_user['last_name']);
    if (isset($tg_user['username'])) {
    $username = htmlspecialchars($tg_user['username']);
    $html = "<h1>Hello, <a href=\"https://t.me/{$username}\">{$first_name} {$last_name}</a>!</h1>";
    } else {
    $html = "<h1>Hello, {$first_name} {$last_name}!</h1>";
    }
    if (isset($tg_user['photo_url'])) {
    $photo_url = htmlspecialchars($tg_user['photo_url']);
    $html .= "<img src=\"{$photo_url}\">";
    }
    $html .= "<p><a href=\"?logout=1\">Log out</a></p>";
    } else {
    $bot_username = BOT_USERNAME;
    $html = <<<HTML
    <h1>Hello, anonymous!</h1>
    <script async src="https://telegram.org/js/telegram-widget.js?2" data-telegram-login="{$bot_username}" data-size="large" data-auth-url="check_authorization.php"></script>
    HTML;
    }


    echo <<<HTML
    <!DOCTYPE html>
    <html>
    <head>
    <meta charset="utf-8">
    <title>Login Widget Example</title>
    </head>
    <body><center>{$html}</center></body>
    </html>
    HTML;

    ?>