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<?php
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<?php
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/*
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/*
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 * php_clientchallenge
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 * php_clientchallenge
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 * Copyright 2021 Daniel Marschall, ViaThinkSoft
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 * Copyright 2021-2022 Daniel Marschall, ViaThinkSoft
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 *
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 * You may obtain a copy of the License at
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 *
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 *
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if (isset($_REQUEST['action']) && ($_REQUEST['action'] === 'add_numbers')) {
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if (isset($_REQUEST['action']) && ($_REQUEST['action'] === 'add_numbers')) {
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        // Check request field "vts_validation_result" for valid response of the Challenge
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        // Check request field "vts_validation_result" for valid response of the Challenge
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        try {
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        try {
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                if (!isset($_REQUEST['vts_validation_result'])) throw new \Exception('No challenge response found');
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                $client_response = @json_decode($_REQUEST['vts_validation_result'], true);
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                \ViaThinkSoft\RateLimitingChallenge\ClientChallenge::checkValidation(MAX_TIME, VTS_CS_SERVER_SECRET);
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                \ViaThinkSoft\RateLimitingChallenge\ClientChallenge::checkValidation($client_response, MAX_TIME, VTS_CS_SERVER_SECRET);
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        } catch (\Exception $e) {
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        } catch (\Exception $e) {
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                $res = array("error" => $e->getMessage());
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                $res = array("error" => $e->getMessage());
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                header('Content-Type:application/json');
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                header('Content-Type:application/json');
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                die(json_encode($res));
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                die(json_encode($res));
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        }
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        }