/**
* Constructor
*
* @param string $data DER encoded data
* @throws DecodeException If data does not adhere to DER
*/
public function __construct($data)
{
$this->_identifier = Identifier::fromDER($data, $this->_contentOffset);
Length::expectFromDER($data, $this->_contentOffset);
$this->_der = $data;
$this->_typeTag = intval($this->_identifier->tag());
}
/**
* Constructor
*
* @param Identifier $identifier
* @param string $data
* @param int $offset Offset to next byte after identifier
*/
public function __construct(Identifier $identifier, $data, $offset)
{
$this->_identifier = $identifier;
$this->_data = $data;
$this->_offset = $offset;
$this->_typeTag = intval($identifier->tag());
}
/**
* Determine the class that implements the type.
*
* @param Identifier $identifier
* @return string Class name
*/
protected static function _determineImplClass(Identifier $identifier)
{
// tagged type
if ($identifier->isContextSpecific()) {
return TaggedType::class;
}
// universal class
if ($identifier->isUniversal()) {
return self::_determineUniversalImplClass(intval($identifier->tag()));
}
throw new \UnexpectedValueException(Identifier::classToName($identifier->typeClass()) . " " . $identifier->tag() . " not implemented.");
}
