/**
* Initialize from ASN.1.
*
* @param Sequence $seq
* @return self
*/
public static function fromASN1(Sequence $seq)
{
$type = AttributeType::fromASN1($seq->at(0)->asObjectIdentifier());
$values = array_map(function (UnspecifiedType $el) use($type) {
return AttributeValue::fromASN1ByOID($type->oid(), $el);
}, $seq->at(1)->asSet()->elements());
return new self($type, ...$values);
}
/**
* Check whether attribute is semantically equal to other.
*
* @param AttributeTypeAndValue $other Object to compare to
* @return bool
*/
public function equals(AttributeTypeAndValue $other)
{
// check that attribute types match
if ($this->oid() !== $other->oid()) {
return false;
}
$matcher = $this->_value->equalityMatchingRule();
$result = $matcher->compare($this->_value->stringValue(), $other->_value->stringValue());
// match
if ($result) {
return true;
}
// no match or Undefined
return false;
}
/**
* Initialize from distinguished name string.
*
* @link https://tools.ietf.org/html/rfc1779
* @param string $str
* @return self
*/
public static function fromString($str)
{
$rdns = array();
foreach (DNParser::parseString($str) as $nameComponent) {
$attribs = array();
foreach ($nameComponent as list($name, $val)) {
$type = AttributeType::fromName($name);
// hexstrings are parsed to ASN.1 elements
if ($val instanceof Element) {
$el = $val;
} else {
$el = AttributeType::asn1StringForType($type->oid(), $val);
}
$value = AttributeValue::fromASN1ByOID($type->oid(), $el->asUnspecified());
$attribs[] = new AttributeTypeAndValue($type, $value);
}
$rdns[] = new RDN(...$attribs);
}
return new self(...$rdns);
}
/**
* Initialize from another AttributeValue.
*
* This method is generally used to cast UnknownAttributeValue to
* specific object when class is declared outside this package.
*
* @param self $obj Instance of AttributeValue
* @return self
*/
public static function fromSelf(self $obj)
{
return static::fromASN1($obj->toASN1()->asUnspecified());
}
