<?php

// Return encrypt data in base64
function encryptDataInBase64($input, $key) {
    $alg = MCRYPT_RIJNDAEL_128; // AES
    $mode = MCRYPT_MODE_ECB; // ECB
    // PKCS5Padding
    $block_size = mcrypt_get_block_size($alg, $mode);
    $pad = $block_size - (strlen($input) % $block_size);
    $input .= str_repeat(chr($pad), $pad);
    $crypttext = mcrypt_encrypt($alg, $key, $input, $mode);
    $encryptDataInBase64 = base64_encode($crypttext);
    return $encryptDataInBase64;
}

// Return hash in base64
function hashDataInBase64($input) {
    $output = hash("sha256", $input, true);
    $hashDataInBase64 = base64_encode($output);
    return $hashDataInBase64;
}

// Create signature
function createSignature($input, $key) {
    $alg = MCRYPT_RIJNDAEL_128; // AES
    $mode = MCRYPT_MODE_ECB; // ECB
    // PKCS5Padding
    $block_size = mcrypt_get_block_size($alg, $mode);
    $pad = $block_size - (strlen($input) % $block_size);
    $input .= str_repeat(chr($pad), $pad);
    // Perform encryption
    $crypttext = mcrypt_encrypt($alg, $key, $input, $mode);
    // Perform digest or hash on output of encryption
    $output = hash("sha256", $crypttext, true);
    // Perform base64 on output of digest / hash
    $signature = base64_encode($output);
    return $signature;
}

// Delete empty array values
function arrayEmptyClear($array) {
    if (!is_array($array))
        return false;
    foreach ($array as $i => $j) {
        if (is_array($j)) {
            $array[$i] = arrayEmptyClear($j);
            if (count($array[$i]) == false)
                unset($array[$i]);
        } else {
            if ($j === "" || $j === null || $j == false) {
                unset($array[$i]);
            }
        }
    }
    return $array;
}

// Random number
$randomNumber = rand(1, 999999);

// Merchant Details
$url = "https://securemasterpay.com/FE/rest/tx/purchase/w/execute";
$merchantId = "";
$merchantAccountId = "";
$accountUsername = "";
$accountPassword = "";
$key = "";

// All request parameters
$requestParams = [
    // Merchant Credentials
    "merchantIdHash" => hashDataInBase64($merchantId),
    "merchantAccountIdHash" => hashDataInBase64($merchantAccountId),
    "encryptedAccountUsername" => encryptDataInBase64($accountUsername, $key),
    "encryptedAccountPassword" => encryptDataInBase64($accountPassword, $key),
    // Additional Data
    "lang" => "EN",
    "requestTime" => date("Y-m-d H:i:s"),
    // Transaction Info
    "transactionInfo" => [
        "apiVersion" => "1.0.0",
        "requestId" => "Request_" . date("dmY\THis_") . $randomNumber,
        "txSource" => "1",
        "recurrentType" => "1",
        "perform3DS" => "0",
        "statementText" => "Test Purchase " . date("d.m.Y ") . $randomNumber,
        "cancelUrl" => "http://127.0.0.1/cancel",
        "returnUrl" => "http://127.0.0.1/return",
        "notificationUrl" => "http://127.0.0.1/notification",
        // Order Data
        "orderData" => [
            "orderId" => "Order_" . date("dmY\THis_") . $randomNumber,
            "orderDescription" => "Test Purchase " . $randomNumber,
            "amount" => "1.00",
            "currencyCode" => "USD",
        /*
         * Example
          // Billing Address
          "billingAddress" => [
          "firstName" => "John",
          "lastName" => "Doe",
          "address1" => "Chajkovskogo str.",
          "address2" => "29",
          "city" => "Saint Petersburg",
          "zipcode" => "191123",
          "stateCode" => "RU",
          "countryCode" => "RU",
          "mobile" => "78123098735",
          "phone" => "78123098735",
          "email" => "support@wirecapital.com",
          "fax" => "78123098735"
          ],
          // Shipping Address
          "shippingAddress" => "",
          // Personal Address
          "personalAddress" => "",
         */
        ]
    ]
];

// Signature
$requestParams["signature"] = createSignature($requestParams["requestTime"] .
        $requestParams["merchantIdHash"] .
        $requestParams["merchantAccountIdHash"] .
        $requestParams["encryptedAccountUsername"] .
        $requestParams["encryptedAccountPassword"] .
        $requestParams["transactionInfo"]["apiVersion"] .
        $requestParams["transactionInfo"]["requestId"] .
        $requestParams["transactionInfo"]["txSource"] .
        $requestParams["transactionInfo"]["recurrentType"] .
        $requestParams["transactionInfo"]["orderData"]["orderId"] .
        $requestParams["transactionInfo"]["orderData"]["orderDescription"] .
        $requestParams["transactionInfo"]["orderData"]["amount"] .
        $requestParams["transactionInfo"]["orderData"]["currencyCode"] .
        /*
          $requestParams["transactionInfo"]["orderData"]["billingAddress"]["firstName"] .
          $requestParams["transactionInfo"]["orderData"]["billingAddress"]["lastName"] .
          $requestParams["transactionInfo"]["orderData"]["billingAddress"]["address1"] .
          $requestParams["transactionInfo"]["orderData"]["billingAddress"]["address2"] .
          $requestParams["transactionInfo"]["orderData"]["billingAddress"]["city"] .
          $requestParams["transactionInfo"]["orderData"]["billingAddress"]["zipcode"] .
          $requestParams["transactionInfo"]["orderData"]["billingAddress"]["stateCode"] .
          $requestParams["transactionInfo"]["orderData"]["billingAddress"]["countryCode"] .
          $requestParams["transactionInfo"]["orderData"]["billingAddress"]["mobile"] .
          $requestParams["transactionInfo"]["orderData"]["billingAddress"]["phone"] .
          $requestParams["transactionInfo"]["orderData"]["billingAddress"]["email"] .
          $requestParams["transactionInfo"]["orderData"]["billingAddress"]["fax"] .
          $requestParams["transactionInfo"]["orderData"]["shippingAddress"]["firstName"] .
          $requestParams["transactionInfo"]["orderData"]["shippingAddress"]["lastName"] .
          $requestParams["transactionInfo"]["orderData"]["shippingAddress"]["address1"] .
          $requestParams["transactionInfo"]["orderData"]["shippingAddress"]["address2"] .
          $requestParams["transactionInfo"]["orderData"]["shippingAddress"]["city"] .
          $requestParams["transactionInfo"]["orderData"]["shippingAddress"]["zipcode"] .
          $requestParams["transactionInfo"]["orderData"]["shippingAddress"]["stateCode"] .
          $requestParams["transactionInfo"]["orderData"]["shippingAddress"]["countryCode"] .
          $requestParams["transactionInfo"]["orderData"]["shippingAddress"]["mobile"] .
          $requestParams["transactionInfo"]["orderData"]["shippingAddress"]["phone"] .
          $requestParams["transactionInfo"]["orderData"]["shippingAddress"]["email"] .
          $requestParams["transactionInfo"]["orderData"]["shippingAddress"]["fax"] .
          $requestParams["transactionInfo"]["orderData"]["personalAddress"]["firstName"] .
          $requestParams["transactionInfo"]["orderData"]["personalAddress"]["lastName"] .
          $requestParams["transactionInfo"]["orderData"]["personalAddress"]["address1"] .
          $requestParams["transactionInfo"]["orderData"]["personalAddress"]["address2"] .
          $requestParams["transactionInfo"]["orderData"]["personalAddress"]["city"] .
          $requestParams["transactionInfo"]["orderData"]["personalAddress"]["zipcode"] .
          $requestParams["transactionInfo"]["orderData"]["personalAddress"]["stateCode"] .
          $requestParams["transactionInfo"]["orderData"]["personalAddress"]["countryCode"] .
          $requestParams["transactionInfo"]["orderData"]["personalAddress"]["mobile"] .
          $requestParams["transactionInfo"]["orderData"]["personalAddress"]["phone"] .
          $requestParams["transactionInfo"]["orderData"]["personalAddress"]["email"] .
          $requestParams["transactionInfo"]["orderData"]["personalAddress"]["fax"] .
         *
         */
        $requestParams["transactionInfo"]["statementText"] .
        $requestParams["transactionInfo"]["cancelUrl"] .
        $requestParams["transactionInfo"]["returnUrl"] .
        $requestParams["transactionInfo"]["notificationUrl"], $key);

// Request
$request = base64_encode(json_encode(arrayEmptyClear($requestParams), JSON_FORCE_OBJECT | JSON_UNESCAPED_SLASHES));

// Redirect to KPG
header("Content-Type: text/html; charset=utf-8");
echo '<!DOCTYPE html>
<html lang="EN">
<head>
	<title>Transaction is in progress. Please wait..</title>
	<script src="../js/jquery.min.js"></script>
	<script>
		$(window).load(function() {
			$(".loader").fadeOut("slow");
		});
	</script>
</head>
<body>
	<form id="payForm" action="' . $url . '" method="POST">
		<input type="hidden" name="request" value="' . $request . '" />
	</form>
	<script>
		document.getElementById("payForm").submit();
	</script>
</body>
</html>';
?>