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<?php |
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declare(strict_types = 1); |
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namespace Sop\JWX\Util; |
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/* |
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Layout and Byte Order |
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http://tools.ietf.org/search/rfc4122#section-4.1.2 |
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0 1 2 3 |
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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| time_low | |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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| time_mid | time_hi_and_version | |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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|clk_seq_hi_res | clk_seq_low | node (0-1) | |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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| node (2-5) | |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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*/ |
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/** |
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* UUID version 4. |
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* |
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* @see http://tools.ietf.org/search/rfc4122#section-4.4 |
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*/ |
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class UUIDv4 |
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{ |
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/** |
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* UUID. |
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* |
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* @var string |
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*/ |
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protected $_uuid; |
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/** |
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* Constructor. |
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* |
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* @param string $uuid UUIDv4 in canonical hexadecimal format |
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*/ |
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public function __construct(string $uuid) |
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{ |
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// @todo Check that UUID is version 4 |
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2 |
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$this->_uuid = $uuid; |
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} |
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1 |
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public function __toString(): string |
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{ |
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return $this->canonical(); |
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} |
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/** |
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* Create new random UUIDv4. |
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*/ |
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public static function createRandom(): self |
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{ |
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/* |
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1. Set the two most significant bits (bits 6 and 7) of |
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the clock_seq_hi_and_reserved to zero and one, respectively. |
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2. Set the four most significant bits (bits 12 through 15) of |
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the time_hi_and_version field to the 4-bit version number |
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from Section 4.1.3. |
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3. Set all the other bits to randomly (or pseudo-randomly) |
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chosen values. |
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*/ |
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1 |
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$uuid = sprintf('%04x%04x-%04x-%04x-%02x%02x-%04x%04x%04x', |
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// time_low |
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1 |
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mt_rand(0, 0xffff), mt_rand(0, 0xffff), |
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// time_mid |
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1 |
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mt_rand(0, 0xffff), |
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// time_hi_and_version |
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1 |
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mt_rand(0, 0x0fff) | 0x4000, |
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// clk_seq_hi_res |
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1 |
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mt_rand(0, 0x3f) | 0x80, |
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// clk_seq_low |
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1 |
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mt_rand(0, 0xff), |
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// node |
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mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff)); |
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1 |
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return new self($uuid); |
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} |
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/** |
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* Get UUIDv4 in canonical form. |
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*/ |
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2 |
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public function canonical(): string |
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{ |
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2 |
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return $this->_uuid; |
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} |
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} |
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sop /
jwx
