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File Name : DceSecurityGenerator.php

<?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
 */

declare(strict_types=1);

namespace Ramsey\Uuid\Generator;

use Ramsey\Uuid\Converter\NumberConverterInterface;
use Ramsey\Uuid\Exception\DceSecurityException;
use Ramsey\Uuid\Provider\DceSecurityProviderInterface;
use Ramsey\Uuid\Type\Hexadecimal;
use Ramsey\Uuid\Type\Integer as IntegerObject;
use Ramsey\Uuid\Uuid;

use function hex2bin;
use function in_array;
use function pack;
use function str_pad;
use function strlen;
use function substr_replace;

use const STR_PAD_LEFT;

/**
 * DceSecurityGenerator generates strings of binary data based on a local
 * domain, local identifier, node ID, clock sequence, and the current time
 */
class DceSecurityGenerator implements DceSecurityGeneratorInterface
{
    private const DOMAINS = [
        Uuid::DCE_DOMAIN_PERSON,
        Uuid::DCE_DOMAIN_GROUP,
        Uuid::DCE_DOMAIN_ORG,
    ];

/**
     * Upper bounds for the clock sequence in DCE Security UUIDs.
     */
    private const CLOCK_SEQ_HIGH = 63;

/**
     * Lower bounds for the clock sequence in DCE Security UUIDs.
     */
    private const CLOCK_SEQ_LOW = 0;

/**
     * @var NumberConverterInterface
     */
    private $numberConverter;

/**
     * @var TimeGeneratorInterface
     */
    private $timeGenerator;

/**
     * @var DceSecurityProviderInterface
     */
    private $dceSecurityProvider;

public function __construct(
        NumberConverterInterface $numberConverter,
        TimeGeneratorInterface $timeGenerator,
        DceSecurityProviderInterface $dceSecurityProvider
    ) {
        $this->numberConverter = $numberConverter;
        $this->timeGenerator = $timeGenerator;
        $this->dceSecurityProvider = $dceSecurityProvider;
    }

public function generate(
        int $localDomain,
        ?IntegerObject $localIdentifier = null,
        ?Hexadecimal $node = null,
        ?int $clockSeq = null
    ): string {
        if (!in_array($localDomain, self::DOMAINS)) {
            throw new DceSecurityException(
                'Local domain must be a valid DCE Security domain'
            );
        }

if ($localIdentifier && $localIdentifier->isNegative()) {
            throw new DceSecurityException(
                'Local identifier out of bounds; it must be a value between 0 and 4294967295'
            );
        }

if ($clockSeq > self::CLOCK_SEQ_HIGH || $clockSeq < self::CLOCK_SEQ_LOW) {
            throw new DceSecurityException(
                'Clock sequence out of bounds; it must be a value between 0 and 63'
            );
        }

switch ($localDomain) {
            case Uuid::DCE_DOMAIN_ORG:
                if ($localIdentifier === null) {
                    throw new DceSecurityException(
                        'A local identifier must be provided for the org domain'
                    );
                }

break;
            case Uuid::DCE_DOMAIN_PERSON:
                if ($localIdentifier === null) {
                    $localIdentifier = $this->dceSecurityProvider->getUid();
                }

break;
            case Uuid::DCE_DOMAIN_GROUP:
            default:
                if ($localIdentifier === null) {
                    $localIdentifier = $this->dceSecurityProvider->getGid();
                }

break;
        }

$identifierHex = $this->numberConverter->toHex($localIdentifier->toString());

// The maximum value for the local identifier is 0xffffffff, or
        // 4294967295. This is 8 hexadecimal digits, so if the length of
        // hexadecimal digits is greater than 8, we know the value is greater
        // than 0xffffffff.
        if (strlen($identifierHex) > 8) {
            throw new DceSecurityException(
                'Local identifier out of bounds; it must be a value between 0 and 4294967295'
            );
        }

$domainByte = pack('n', $localDomain)[1];
        $identifierBytes = (string) hex2bin(str_pad($identifierHex, 8, '0', STR_PAD_LEFT));

if ($node instanceof Hexadecimal) {
            $node = $node->toString();
        }

// Shift the clock sequence 8 bits to the left, so it matches 0x3f00.
        if ($clockSeq !== null) {
            $clockSeq = $clockSeq << 8;
        }

$bytes = $this->timeGenerator->generate($node, $clockSeq);

// Replace bytes in the time-based UUID with DCE Security values.
        $bytes = substr_replace($bytes, $identifierBytes, 0, 4);
        $bytes = substr_replace($bytes, $domainByte, 9, 1);

return $bytes;
    }
}

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	pluszzsu/pluszzsu	0755	2021-09-26 02:10:38
..	dir	-	pluszzsu/pluszzsu	0755	2021-09-26 02:10:38
CombGenerator.php	text/x-php	3.37 KB	pluszzsu/pluszzsu	0644	2021-09-26 02:10:38
DceSecurityGenerator.php	text/x-php	4.75 KB	pluszzsu/pluszzsu	0644	2021-09-26 02:10:38
DceSecurityGeneratorInterface.php	text/x-php	1.71 KB	pluszzsu/pluszzsu	0644	2021-09-26 02:10:38
DefaultNameGenerator.php	text/x-php	1.24 KB	pluszzsu/pluszzsu	0644	2021-09-26 02:10:38
DefaultTimeGenerator.php	text/x-php	4.11 KB	pluszzsu/pluszzsu	0644	2021-09-26 02:10:38
NameGeneratorFactory.php	text/x-php	698 B	pluszzsu/pluszzsu	0644	2021-09-26 02:10:38
NameGeneratorInterface.php	text/x-php	1.04 KB	pluszzsu/pluszzsu	0644	2021-09-26 02:10:38
PeclUuidNameGenerator.php	text/x-php	1.4 KB	pluszzsu/pluszzsu	0644	2021-09-26 02:10:38
PeclUuidRandomGenerator.php	text/x-php	807 B	pluszzsu/pluszzsu	0644	2021-09-26 02:10:38
PeclUuidTimeGenerator.php	text/x-php	873 B	pluszzsu/pluszzsu	0644	2021-09-26 02:10:38
RandomBytesGenerator.php	text/x-php	1.12 KB	pluszzsu/pluszzsu	0644	2021-09-26 02:10:38
RandomGeneratorFactory.php	text/x-php	708 B	pluszzsu/pluszzsu	0644	2021-09-26 02:10:38
RandomGeneratorInterface.php	text/x-php	727 B	pluszzsu/pluszzsu	0644	2021-09-26 02:10:38
RandomLibAdapter.php	text/x-php	1.37 KB	pluszzsu/pluszzsu	0644	2021-09-26 02:10:38
TimeGeneratorFactory.php	text/x-php	1.47 KB	pluszzsu/pluszzsu	0644	2021-09-26 02:10:38
TimeGeneratorInterface.php	text/x-php	1.13 KB	pluszzsu/pluszzsu	0644	2021-09-26 02:10:38

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