/usr/share/php/Horde/Support/Uuid.php is in php-horde-support 2.1.5-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* Class for generating RFC 4122 UUIDs. Usage:
*
* <code>
* $uuid = (string)new Horde_Support_Uuid;
* </code>
*
* Copyright 2008-2016 Horde LLC (http://www.horde.org/)
*
* @category Horde
* @package Support
* @license http://www.horde.org/licenses/bsd
*/
class Horde_Support_Uuid
{
/**
* Generated UUID
* @var string
*/
private $_uuid;
/**
* New UUID.
*/
public function __construct()
{
$this->generate();
}
/**
* Generate a 36-character RFC 4122 UUID, without the urn:uuid: prefix.
*
* @see http://www.ietf.org/rfc/rfc4122.txt
* @see http://labs.omniti.com/alexandria/trunk/OmniTI/Util/UUID.php
*/
public function generate()
{
$this->_uuid = null;
if (extension_loaded('uuid')) {
if (function_exists('uuid_export')) {
// UUID extension from http://www.ossp.org/pkg/lib/uuid/
if (uuid_create($ctx) == UUID_RC_OK &&
uuid_make($ctx, UUID_MAKE_V4) == UUID_RC_OK &&
uuid_export($ctx, UUID_FMT_STR, $str) == UUID_RC_OK) {
$this->_uuid = $str;
uuid_destroy($ctx);
}
} else {
// UUID extension from http://pecl.php.net/package/uuid
$this->_uuid = uuid_create();
}
}
if (!$this->_uuid) {
list($time_mid, $time_low) = explode(' ', microtime());
$time_low = (int)$time_low;
$time_mid = (int)substr($time_mid, 2) & 0xffff;
$time_high = mt_rand(0, 0x0fff) | 0x4000;
$clock = mt_rand(0, 0x3fff) | 0x8000;
$node_low = function_exists('zend_thread_id')
? zend_thread_id()
: getmypid();
$node_high = isset($_SERVER['SERVER_ADDR'])
? ip2long($_SERVER['SERVER_ADDR'])
: crc32(php_uname());
$node = bin2hex(pack('nN', $node_low, $node_high));
$this->_uuid = sprintf('%08x-%04x-%04x-%04x-%s',
$time_low, $time_mid, $time_high, $clock, $node);
}
}
/**
* Cooerce to string.
*
* @return string UUID.
*/
public function __toString()
{
return $this->_uuid;
}
}
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