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<?php

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namespace Nextend\SmartSlider3\Generator;

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use Nextend\Framework\Pattern\MVCHelperTrait;

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abstract class AbstractGeneratorGroupConfiguration {

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const CSRF_LENGTH = 32;

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/** @var AbstractGeneratorGroup */

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protected $generatorGroup;

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/**

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* AbstractGeneratorGroupConfiguration constructor.

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* @param AbstractGeneratorGroup $generatorGroup

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public function __construct($generatorGroup) {

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$this->generatorGroup = $generatorGroup;

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}

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/**

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* @return bool

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public abstract function wellConfigured();

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/**

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* @return array

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public abstract function getData();

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/**

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* @param $data

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* @param bool $store

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public abstract function addData($data, $store = true);

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/**

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* @param MVCHelperTrait $MVCHelper

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public abstract function render($MVCHelper);

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/**

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* @param MVCHelperTrait $MVCHelper

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public abstract function startAuth($MVCHelper);

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/**

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* @param MVCHelperTrait $MVCHelper

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public abstract function finishAuth($MVCHelper);

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protected function generateRandomState() {

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if (function_exists('random_bytes')) {

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return $this->bytesToString(random_bytes(self::CSRF_LENGTH));

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}

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if (function_exists('mcrypt_create_iv')) {

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/** @noinspection PhpDeprecationInspection */

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$binaryString = mcrypt_create_iv(self::CSRF_LENGTH, MCRYPT_DEV_URANDOM);

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if ($binaryString !== false) {

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return $this->bytesToString($binaryString);

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}

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}

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if (function_exists('openssl_random_pseudo_bytes')) {

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$wasCryptographicallyStrong = false;

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$binaryString = openssl_random_pseudo_bytes(self::CSRF_LENGTH, $wasCryptographicallyStrong);

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if ($binaryString !== false && $wasCryptographicallyStrong === true) {

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return $this->bytesToString($binaryString);

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}

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}

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return $this->randomStr(self::CSRF_LENGTH);

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}

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private function bytesToString($binaryString) {

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return substr(bin2hex($binaryString), 0, self::CSRF_LENGTH);

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}

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private function randomStr($length, $keyspace = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ') {

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$str = '';

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$max = strlen($keyspace) - 1;

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for ($i = 0; $i < $length; ++$i) {

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$str .= $keyspace[random_int(0, $max)];

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}

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return $str;

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}

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}

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