| protected static _generateSaltXdes ( integer $count = null ) : string | ||
| $count | integer | The base-2 logarithm of the iteration count. Defaults to `18`. Can be `1` to `24`. 1 will be stripped from the non-log value, e.g. 2^18 - 1, to ensure we don't use a weak DES key. |
| return | string | The XDES salt. |
protected static function _generateSaltXdes($count = null)
{
$count = (int) $count;
$count = $count < 1 || $count > 24 ? static::XDES : $count;
$count = (1 << $count) - 1;
$base64 = './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
$output = '_' . $base64[$count & 0x3f] . $base64[$count >> 6 & 0x3f];
$output .= $base64[$count >> 12 & 0x3f] . $base64[$count >> 18 & 0x3f];
$output .= String::random(3, array('encode' => String::ENCODE_BASE_64));
return $output;
}