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<?php |
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namespace carono\checksum; |
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/** |
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* Class Checksum |
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* |
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* @package carono\checksum |
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*/ |
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class Checksum |
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{ |
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/** |
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* @param $array |
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* @param null $salt |
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* @return string |
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*/ |
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public static function calculate($array, $salt = null) |
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{ |
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if ($key = static::formKey($array)) { |
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return hash('sha256', $key . $salt); |
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} |
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return null; |
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} |
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/** |
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* @param $array |
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* @param $hash |
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* @param null $salt |
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* @return bool |
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*/ |
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public static function validate($array, $hash, $salt = null) |
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{ |
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return static::calculate($array, $salt) === $hash; |
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} |
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/** |
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* @param $array |
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* @return array |
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*/ |
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public static function formKeyPartials($array) |
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{ |
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$array = static::prepareData($array); |
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$result = []; |
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foreach ((array)$array as $model => $values) { |
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foreach (array_keys((array)$values) as $key) { |
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$result[] = implode('=', [$model, $key]); |
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} |
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} |
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$result = array_unique($result); |
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sort($result); |
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return $result; |
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} |
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/** |
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* @param $array |
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* @return array |
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*/ |
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protected static function prepareData($array) |
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{ |
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return array_filter($array ?: [], 'is_array'); |
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} |
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/** |
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* @param $array |
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* @return string |
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*/ |
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public static function formKey($array) |
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{ |
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return implode('|', static::formKeyPartials($array)); |
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} |
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/** |
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* @param $post |
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* @param $stack |
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* @param null $salt |
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* @return bool |
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*/ |
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public static function compareStacks($post, $stack, $salt = null) |
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{ |
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$checksum = static::calculate($stack, $salt); |
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$post = static::mergeStacks($post, $stack); |
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return static::validate($post, $checksum, $salt); |
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} |
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/** |
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* @param $post |
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* @param $stack |
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* @return mixed |
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*/ |
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protected static function mergeStacks($post, $stack) |
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{ |
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$postPartials = static::formKeyPartials($post); |
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$stackPartials = static::formKeyPartials($stack); |
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foreach (array_diff($stackPartials, $postPartials) as $lostPartial) { |
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list($formName, $attribute) = explode('=', $lostPartial); |
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$post[$formName][$attribute] = ''; |
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} |
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return $post; |
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} |
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} |
carono /
yii2-request-checksum
