$bits = String::random(8); // 64 bits
$hex = bin2hex($bits); // [0-9a-f]+
Optionally base64-encodes the resulting random string per the following. The
alphabet used by base64_encode() is different than the one we should be using.
When considering the meaty part of the resulting string, however, a bijection
allows to go the from one to another. Given that we're working on random bytes, we
can use safely use base64_encode() without losing any entropy.
| public static random ( integer $bytes, array $options = [] ) : string | ||
| $bytes | integer | The number of random bytes to generate. |
| $options | array | The options used when generating random bytes: - `'encode'` _integer_: If specified, and set to `String::ENCODE_BASE_64`, the resulting value will be base64-encoded, per the notes above. |
| return | string | Returns a string of random bytes. |
public static function __init()
{
parent::__init();
static::applyFilter('create', function ($self, $params, $chain) {
if (empty($params['data']['secret'])) {
$params['data']['secret'] = bin2hex(String::random(16));
}
return $chain->next($self, $params, $chain);
});
static::finder('getApplicationByIdAndSecret', function ($self, $params, $chain) {
// Do stuff
$data = $chain->next($self, $params, $chain);
return $data ?: null;
});
}
/**
* Generates an MD5 salt for use in `lithium\security\Password::hash()`.
*
* @return string The MD5 salt.
*/
protected static function _generateSaltMd5()
{
return '$1$' . String::random(6, array('encode' => String::ENCODE_BASE_64));
}
/**
* Tests the random number generator with base64 encoding.
*/
public function testRandom64Generator()
{
$check = array();
$count = 25;
$pattern = "/^[0-9A-Za-z\\.\\/]{11}\$/";
for ($i = 0; $i < $count; $i++) {
$result = String::random(8, array('encode' => String::ENCODE_BASE_64));
$this->assertPattern($pattern, $result);
$this->assertFalse(in_array($result, $check));
$check[] = $result;
}
}
