/**
*
* @see \ASN1\Element::_decodeFromDER()
* @return self
*/
protected static function _decodeFromDER(Identifier $identifier, $data, &$offset)
{
$idx = $offset;
if (!$identifier->isConstructed()) {
throw new DecodeException("Structured element must have constructed bit set.");
}
$length = Length::expectFromDER($data, $idx);
$end = $idx + $length->length();
$elements = array();
while ($idx < $end) {
$elements[] = Element::fromDER($data, $idx);
// check that element didn't overflow length
if ($idx > $end) {
throw new DecodeException("Structure's content overflows length.");
}
}
$offset = $idx;
// return instance by static late binding
return new static(...$elements);
}
/**
*
* @see \ASN1\Element::isConstructed()
* @return bool
*/
public function isConstructed()
{
return $this->_identifier->isConstructed();
}
