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<?php |
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/* |
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You may not change or alter any portion of this comment or credits |
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of supporting developers from this source code or any supporting source code |
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which is considered copyrighted (c) material of the original comment or credit authors. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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*/ |
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namespace Xmf; |
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/** |
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* Generate UUID |
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* |
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* @category Xmf\Uuid |
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* @package Xmf |
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* @author Richard Griffith <[email protected]> |
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* @copyright 2017-2019 XOOPS Project (https://xoops.org) |
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* @license GNU GPL 2 or later (https://www.gnu.org/licenses/gpl-2.0.html) |
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*/ |
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class Uuid |
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{ |
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// match spec for version 4 UUID as per rfc4122 |
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protected const UUID_REGEX = '/^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/'; |
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/** |
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* generate - generate a version 4 (random) UUID |
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* |
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* Based on comment by pavel.volyntsev(at)gmail at http://php.net/manual/en/function.com-create-guid.php |
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* |
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* @return string UUID |
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* |
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* @throws \Exception on insufficient entropy |
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*/ |
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public static function generate() |
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{ |
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$data = random_bytes(16); |
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3 |
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$data[6] = chr(ord($data[6]) & 0x0f | 0x40); // set version to 0100 |
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$data[8] = chr(ord($data[8]) & 0x3f | 0x80); // set bits 6-7 to 10 |
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return vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($data), 4)); |
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} |
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/** |
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* Pack a UUID into a binary string |
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* |
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* @param string $uuid a valid UUID |
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* |
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* @return string packed UUID as a binary string |
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* |
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* @throws \InvalidArgumentException |
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* @throws \UnexpectedValueException |
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*/ |
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public static function packAsBinary($uuid) |
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{ |
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if (!preg_match(static::UUID_REGEX, $uuid)) { |
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throw new \InvalidArgumentException('Invalid UUID'); |
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} |
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$return = pack("H*", str_replace('-', '', $uuid)); |
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if (false === $return) { |
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throw new \UnexpectedValueException('Packing UUID Failed'); |
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} |
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return $return; |
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} |
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/** |
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* Unpack a UUID stored as a binary string |
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* |
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* @param string $packedUuid a packed UUID as returned by packAsBinary() |
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* |
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* @return string unpacked UUID |
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* |
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* @throws \InvalidArgumentException |
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* @throws \UnexpectedValueException |
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*/ |
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public static function unpackBinary($packedUuid) |
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{ |
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if (16 !== strlen($packedUuid)) { |
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throw new \InvalidArgumentException('Invalid packed UUID'); |
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} |
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$return = vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($packedUuid), 4)); |
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if (!preg_match(static::UUID_REGEX, $return)) { |
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throw new \UnexpectedValueException('Unpacking UUID Failed'); |
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} |
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return $return; |
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} |
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} |
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XOOPS /
XoopsCore
