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use random_bytes to generate UUID v4

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Max Pozdeev 2022-01-31 23:01:59 +03:00
parent a2f8c843cd
commit 23ddd8cbe2
1 changed files with 13 additions and 7 deletions
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20
src/includes/common.php
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@ -105,14 +105,20 @@ function removeNewLines($s)
return str_replace( ["\r","\n"], '', $s );
}
/* found in comments on http://www.php.net/manual/en/function.uniqid.php#94959 */
function generateUUID()
/**
* Generates UUID v4
* Implementation from https://github.com/symfony/polyfill-uuid
*/
function generateUUID(): string
{
return sprintf('%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff),
mt_rand(0, 0x0fff) | 0x4000,
mt_rand(0, 0x3fff) | 0x8000,
mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff)
$uuid = bin2hex(random_bytes(16));
return sprintf('%08s-%04s-4%03s-%04x-%012s',
substr($uuid, 0, 8),
substr($uuid, 8, 4),
// $uuid[14] = 4
substr($uuid, 13, 3),
hexdec(substr($uuid, 16, 4)) & 0x3fff | 0x8000,
substr($uuid, 20, 12)
);
}