list ($salt, $signature) = explode($this->signDelim, $token);
if (strlen($salt) != self::SALT_LEN) {
throw new Exception("Invalid salt [$token]=[$salt][$signature]");
list ($salt, $signature) = explode($this->signDelim, $token);
if (strlen($salt) != self::SALT_LEN) {
throw new Exception("Invalid salt [$token]=[$salt][$signature]");