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author | Max Kostikov <max@kostikov.co> | 2018-09-28 15:46:14 +0200 |
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committer | Max Kostikov <max@kostikov.co> | 2018-09-28 15:46:14 +0200 |
commit | 4a904fa3a8af1c101ede76657249fb7eb47faf60 (patch) | |
tree | 544509813fb68579ef2b556ce879a971d183269a /vendor/ramsey/uuid/src/Generator/DefaultTimeGenerator.php | |
parent | f5f6ec3d71acb3e0488386819d5060e59331ec23 (diff) | |
parent | c13d7e29ef9676b0f0e4ae23aa52e203f4ad8895 (diff) | |
download | volse-hubzilla-4a904fa3a8af1c101ede76657249fb7eb47faf60.tar.gz volse-hubzilla-4a904fa3a8af1c101ede76657249fb7eb47faf60.tar.bz2 volse-hubzilla-4a904fa3a8af1c101ede76657249fb7eb47faf60.zip |
Merge branch 'patch-29' into 'dev'
Patch 29
See merge request Kostikov/core!3
Diffstat (limited to 'vendor/ramsey/uuid/src/Generator/DefaultTimeGenerator.php')
-rw-r--r-- | vendor/ramsey/uuid/src/Generator/DefaultTimeGenerator.php | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/vendor/ramsey/uuid/src/Generator/DefaultTimeGenerator.php b/vendor/ramsey/uuid/src/Generator/DefaultTimeGenerator.php new file mode 100644 index 000000000..c9969b3af --- /dev/null +++ b/vendor/ramsey/uuid/src/Generator/DefaultTimeGenerator.php @@ -0,0 +1,138 @@ +<?php +/** + * This file is part of the ramsey/uuid library + * + * For the full copyright and license information, please view the LICENSE + * file that was distributed with this source code. + * + * @copyright Copyright (c) Ben Ramsey <ben@benramsey.com> + * @license http://opensource.org/licenses/MIT MIT + * @link https://benramsey.com/projects/ramsey-uuid/ Documentation + * @link https://packagist.org/packages/ramsey/uuid Packagist + * @link https://github.com/ramsey/uuid GitHub + */ + +namespace Ramsey\Uuid\Generator; + +use Ramsey\Uuid\BinaryUtils; +use Ramsey\Uuid\Converter\TimeConverterInterface; +use Ramsey\Uuid\Provider\NodeProviderInterface; +use Ramsey\Uuid\Provider\TimeProviderInterface; + +/** + * DefaultTimeGenerator provides functionality to generate strings of binary + * data for version 1 UUIDs based on a host ID, sequence number, and the current + * time + */ +class DefaultTimeGenerator implements TimeGeneratorInterface +{ + /** + * @var NodeProviderInterface + */ + private $nodeProvider; + + /** + * @var TimeConverterInterface + */ + private $timeConverter; + + /** + * @var TimeProviderInterface + */ + private $timeProvider; + + /** + * Constructs a `DefaultTimeGenerator` using a node provider, time converter, + * and time provider + * + * @param NodeProviderInterface $nodeProvider + * @param TimeConverterInterface $timeConverter + * @param TimeProviderInterface $timeProvider + */ + public function __construct( + NodeProviderInterface $nodeProvider, + TimeConverterInterface $timeConverter, + TimeProviderInterface $timeProvider + ) { + $this->nodeProvider = $nodeProvider; + $this->timeConverter = $timeConverter; + $this->timeProvider = $timeProvider; + } + + /** + * Generate a version 1 UUID from a host ID, sequence number, and the current time + * + * If $node is not given, we will attempt to obtain the local hardware + * address. If $clockSeq is given, it is used as the sequence number; + * otherwise a random 14-bit sequence number is chosen. + * + * @param int|string $node A 48-bit number representing the hardware address + * This number may be represented as an integer or a hexadecimal string. + * @param int $clockSeq A 14-bit number used to help avoid duplicates that + * could arise when the clock is set backwards in time or if the node ID + * changes. + * @return string A binary string + * @throws \Ramsey\Uuid\Exception\UnsatisfiedDependencyException if called on a 32-bit system and + * `Moontoast\Math\BigNumber` is not present + * @throws \InvalidArgumentException + * @throws \Exception if it was not possible to gather sufficient entropy + */ + public function generate($node = null, $clockSeq = null) + { + $node = $this->getValidNode($node); + + if ($clockSeq === null) { + // Not using "stable storage"; see RFC 4122, Section 4.2.1.1 + $clockSeq = random_int(0, 0x3fff); + } + + // Create a 60-bit time value as a count of 100-nanosecond intervals + // since 00:00:00.00, 15 October 1582 + $timeOfDay = $this->timeProvider->currentTime(); + $uuidTime = $this->timeConverter->calculateTime($timeOfDay['sec'], $timeOfDay['usec']); + + $timeHi = BinaryUtils::applyVersion($uuidTime['hi'], 1); + $clockSeqHi = BinaryUtils::applyVariant($clockSeq >> 8); + + $hex = vsprintf( + '%08s%04s%04s%02s%02s%012s', + array( + $uuidTime['low'], + $uuidTime['mid'], + sprintf('%04x', $timeHi), + sprintf('%02x', $clockSeqHi), + sprintf('%02x', $clockSeq & 0xff), + $node, + ) + ); + + return hex2bin($hex); + } + + /** + * Uses the node provider given when constructing this instance to get + * the node ID (usually a MAC address) + * + * @param string|int $node A node value that may be used to override the node provider + * @return string Hexadecimal representation of the node ID + * @throws \InvalidArgumentException + * @throws \Exception + */ + protected function getValidNode($node) + { + if ($node === null) { + $node = $this->nodeProvider->getNode(); + } + + // Convert the node to hex, if it is still an integer + if (is_int($node)) { + $node = sprintf('%012x', $node); + } + + if (!ctype_xdigit($node) || strlen($node) > 12) { + throw new \InvalidArgumentException('Invalid node value'); + } + + return strtolower(sprintf('%012s', $node)); + } +} |