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<?php |
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/** |
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* PHP version 5.4 and 8 |
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* |
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* @category Core |
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* @package Payever\Core |
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* @author payever GmbH <[email protected]> |
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* @author Hennadii.Shymanskyi <[email protected]> |
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* @copyright 2017-2021 payever GmbH |
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* @license MIT <https://opensource.org/licenses/MIT> |
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* @link https://docs.payever.org/shopsystems/api/getting-started |
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*/ |
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namespace Payever\ExternalIntegration\Core; |
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/** |
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* @SuppressWarnings(PHPMD.MissingImport) |
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*/ |
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class PseudoRandomStringGenerator |
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{ |
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/** @var string */ |
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protected static $fallbackKeyspace = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; |
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/** |
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* Generates a random string, using a cryptographically secure pseudo-random number generator. |
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* Falling back to non-CSPRNG generation when no source of random available. |
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* |
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* @param int $length |
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* |
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* @return string |
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* |
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* @throws \Exception when CSPRNG source failed to provide random bytes |
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* @SuppressWarnings(PHPMD.IfStatementAssignment) |
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* @SuppressWarnings(PHPMD.ElseExpression) |
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*/ |
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public function generate($length = 64) |
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{ |
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if (function_exists('random_bytes')) { |
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$binaryString = random_bytes($length); |
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// @codeCoverageIgnoreStart |
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} elseif (function_exists('mcrypt_create_iv')) { |
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$binaryString = /** @scrutinizer ignore-deprecated */ mcrypt_create_iv($length, MCRYPT_DEV_URANDOM); |
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} elseif (function_exists('openssl_random_pseudo_bytes')) { |
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$binaryString = openssl_random_pseudo_bytes($length); |
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} elseif (($stream = fopen('/dev/urandom', 'rb'))) { |
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stream_set_read_buffer($stream, 0); |
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$binaryString = fread($stream, $length); |
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fclose($stream); |
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} else { |
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// well, we've tried |
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$chain = ''; |
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$max = mb_strlen(static::$fallbackKeyspace, '8bit') - 1; |
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for ($i = 0; $i < $length; ++$i) { |
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$chain .= static::$fallbackKeyspace[rand(0, $max)]; |
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} |
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$binaryString = hex2bin($chain); |
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} |
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if ($binaryString === false) { |
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throw new \RuntimeException('Unable to generate random string.'); |
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} |
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// @codeCoverageIgnoreEnd |
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return $this->binToHex($binaryString, $length); |
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} |
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/** |
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* @param string $binaryData |
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* @param int $length |
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* |
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* @return bool|string |
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*/ |
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protected function binToHex($binaryData, $length) |
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{ |
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return substr(bin2hex($binaryData), 0, $length); |
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} |
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} |
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payeverworldwide /
sdk-php
