.
*/
/**
* Generates random bytes.
*
* Could be used as a seed or as a unique value itself.
* Note that the value is not intended to be human-readable,
* and as such should not be used for passwords. To generate
* passwords, see \Textpattern\Password\Generator instead.
*
*
* echo Txp::get('\Textpattern\Password\Random')->generate(196);
*
*
* @since 4.6.0
* @package Password
* @see \Textpattern\Password\Generator
*/
namespace Textpattern\Password;
class Random extends \Textpattern\Password\Generator
{
/**
* {@inheritdoc}
*/
public function getCharacterTable()
{
return array(
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3',
'4', '5', '6', '7', '8', '9', '!', '@', '#', '$', '%', '&', '*', '?',
);
}
/**
* Generates random bytes as a string of given length.
*
*
* echo Txp::get('\Textpattern\Password\Random')->generate(196);
*
*
* @param int $length The length of the generated value
* @return string The value
*/
public function generate($length)
{
$bytes = (int)ceil($length / 2);
if (function_exists('mcrypt_create_iv') && version_compare(PHP_VERSION, '5.3.0') >= 0) {
$random = mcrypt_create_iv($bytes, MCRYPT_DEV_URANDOM);
if ($random && strlen($random) === $bytes) {
return substr(bin2hex($random), 0, $length);
}
}
if (IS_WIN === false && file_exists('/dev/urandom') && is_readable('/dev/urandom') && ($fp = fopen('/dev/urandom', 'rb')) !== false) {
if (function_exists('stream_set_read_buffer')) {
stream_set_read_buffer($fp, 0);
}
$random = fread($fp, $bytes);
fclose($fp);
if ($random && strlen($random) === $bytes) {
return substr(bin2hex($random), 0, $length);
}
}
if (IS_WIN === false && function_exists('openssl_random_pseudo_bytes') && version_compare(PHP_VERSION, '5.3.4') >= 0) {
$random = openssl_random_pseudo_bytes($bytes, $strong);
if ($random && $strong === true && strlen($random) === $bytes) {
return substr(bin2hex($random), 0, $length);
}
}
return parent::generate($length);
}
}