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<?php |
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namespace X501\ASN1; |
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use ASN1\Type\Constructed\Set; |
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use ASN1\Type\UnspecifiedType; |
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use X501\ASN1\AttributeValue\AttributeValue; |
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/** |
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* Implements <i>RelativeDistinguishedName</i> ASN.1 type. |
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* |
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* @link |
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* https://www.itu.int/ITU-T/formal-language/itu-t/x/x501/2012/InformationFramework.html#InformationFramework.RelativeDistinguishedName |
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*/ |
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class RDN implements \Countable, \IteratorAggregate |
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{ |
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/** |
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* Attributes. |
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* |
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* @var AttributeTypeAndValue[] $_attribs |
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*/ |
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protected $_attribs; |
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/** |
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* Constructor |
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* |
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* @param AttributeTypeAndValue ...$attribs One or more attributes |
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*/ |
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public function __construct(AttributeTypeAndValue ...$attribs) { |
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if (!count($attribs)) { |
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throw new \UnexpectedValueException( |
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"RDN must have at least one AttributeTypeAndValue."); |
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} |
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$this->_attribs = $attribs; |
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} |
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/** |
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* Convenience method to initialize RDN from AttributeValue objects. |
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* |
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* @param AttributeValue ...$values One or more attributes |
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* @return self |
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*/ |
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public static function fromAttributeValues(AttributeValue ...$values) { |
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$attribs = array_map( |
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function (AttributeValue $value) { |
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return new AttributeTypeAndValue( |
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new AttributeType($value->oid()), $value); |
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}, $values); |
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return new self(...$attribs); |
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} |
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/** |
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* Initialize from ASN.1. |
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* |
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* @param Set $set |
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* @return self |
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*/ |
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public static function fromASN1(Set $set) { |
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$attribs = array_map( |
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function (UnspecifiedType $el) { |
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return AttributeTypeAndValue::fromASN1($el->asSequence()); |
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}, $set->elements()); |
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return new self(...$attribs); |
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} |
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/** |
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* Generate ASN.1 structure. |
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* |
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* @return Set |
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*/ |
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public function toASN1() { |
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$elements = array_map( |
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function (AttributeTypeAndValue $tv) { |
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return $tv->toASN1(); |
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}, $this->_attribs); |
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$set = new Set(...$elements); |
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return $set->sortedSetOf(); |
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} |
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/** |
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* Get name-component string conforming to RFC 2253. |
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* |
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* @link https://tools.ietf.org/html/rfc2253#section-2.2 |
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* @return string |
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*/ |
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public function toString() { |
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$parts = array_map( |
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function (AttributeTypeAndValue $tv) { |
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return $tv->toString(); |
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}, $this->_attribs); |
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return implode("+", $parts); |
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} |
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/** |
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* Check whether RDN is semantically equal to other. |
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* |
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* @param RDN $other Object to compare to |
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* @return bool |
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*/ |
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public function equals(RDN $other) { |
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// if attribute count doesn't match |
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if (count($this) != count($other)) { |
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return false; |
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} |
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$attribs1 = $this->_attribs; |
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$attribs2 = $other->_attribs; |
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// if there's multiple attributes, sort using SET OF rules |
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if (count($attribs1) > 1) { |
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$attribs1 = self::fromASN1($this->toASN1())->_attribs; |
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$attribs2 = self::fromASN1($other->toASN1())->_attribs; |
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} |
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for ($i = count($attribs1) - 1; $i >= 0; --$i) { |
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$tv1 = $attribs1[$i]; |
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$tv2 = $attribs2[$i]; |
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if (!$tv1->equals($tv2)) { |
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return false; |
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} |
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} |
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return true; |
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} |
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/** |
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* Get all AttributeTypeAndValue objects. |
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* |
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* @return AttributeTypeAndValue[] |
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*/ |
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public function all() { |
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return $this->_attribs; |
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} |
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/** |
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* Get the first AttributeTypeAndValue object in RDN. |
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* |
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* @return AttributeTypeAndValue |
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*/ |
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public function first() { |
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return $this->_attribs[0]; |
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} |
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/** |
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* Find the first AttributeTypeAndValue object of given OID. |
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* |
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* @param string $oid Object identifier in dotted format |
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* @return AttributeTypeAndValue|null Null if not found |
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*/ |
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protected function _findFirstOf($oid) { |
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foreach ($this->_attribs as $attr) { |
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if ($attr->oid() == $oid) { |
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return $attr; |
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} |
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} |
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return null; |
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} |
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/** |
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* Check whether RDN has an attribute of given type. |
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* |
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* @param string $name Attribute name or OID |
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* @return boolean |
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*/ |
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public function has($name) { |
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$oid = AttributeType::attrNameToOID($name); |
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return null !== $this->_findFirstOf($oid); |
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} |
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/** |
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* Get the first AttributeTypeAndValue object of given attribute type. |
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* |
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* @param string $name Attribute name or OID |
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* @throws \LogicException If attribute doesn't exists |
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* @return AttributeTypeAndValue |
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*/ |
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public function firstOf($name) { |
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$oid = AttributeType::attrNameToOID($name); |
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$tv = $this->_findFirstOf($oid); |
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if (null === $tv) { |
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throw new \LogicException("No '$name' attribute."); |
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} |
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return $tv; |
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} |
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/** |
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* |
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* @see Countable::count() |
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* @return int |
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*/ |
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public function count() { |
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return count($this->_attribs); |
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} |
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/** |
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* |
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* @see IteratorAggregate::getIterator() |
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* @return \ArrayIterator |
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*/ |
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public function getIterator() { |
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return new \ArrayIterator($this->_attribs); |
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} |
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/** |
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* |
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* @return string |
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*/ |
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public function __toString() { |
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return $this->toString(); |
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} |
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} |
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