[Security] remove deprecated SrtingUtils class
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Security\Core\Util;
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@trigger_error('The '.__NAMESPACE__.'\\StringUtils class is deprecated since version 2.8 and will be removed in 3.0. Use hash_equals() instead.', E_USER_DEPRECATED);
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use Symfony\Component\Polyfill\Util\Binary;
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/**
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* String utility functions.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*
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* @deprecated since 2.8, to be removed in 3.0.
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*/
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class StringUtils
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{
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/**
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* This class should not be instantiated.
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*/
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private function __construct()
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{
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}
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/**
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* Compares two strings.
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*
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* This method implements a constant-time algorithm to compare strings.
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* Regardless of the used implementation, it will leak length information.
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*
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* @param string $knownString The string of known length to compare against
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* @param string $userInput The string that the user can control
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*
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* @return bool true if the two strings are the same, false otherwise
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*/
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public static function equals($knownString, $userInput)
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{
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// Avoid making unnecessary duplications of secret data
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if (!is_string($knownString)) {
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$knownString = (string) $knownString;
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}
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if (!is_string($userInput)) {
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$userInput = (string) $userInput;
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}
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return hash_equals($knownString, $userInput);
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}
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/**
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* Returns the number of bytes in a string.
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*
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* @param string $string The string whose length we wish to obtain
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*
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* @return int
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*/
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public static function safeStrlen($string)
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{
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return Binary::strlen($string);
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}
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}
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