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<?php |
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declare(strict_types = 1); |
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namespace Sop\X509\Certificate\Extension\NameConstraints; |
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use Sop\ASN1\Element; |
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use Sop\ASN1\Type\Constructed\Sequence; |
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use Sop\ASN1\Type\Primitive\Integer; |
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use Sop\ASN1\Type\Tagged\ImplicitlyTaggedType; |
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use Sop\X509\GeneralName\GeneralName; |
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/** |
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* Implements <i>GeneralSubtree</i> ASN.1 type used by |
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* 'Name Constraints' certificate extension. |
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* |
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* @see https://tools.ietf.org/html/rfc5280#section-4.2.1.10 |
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*/ |
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class GeneralSubtree |
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{ |
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/** |
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* Constraint. |
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* |
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* @var GeneralName |
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*/ |
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protected $_base; |
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/** |
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* Not used, must be zero. |
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* |
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* @var int |
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*/ |
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protected $_min; |
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/** |
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* Not used, must be null. |
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* |
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* @var null|int |
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*/ |
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protected $_max; |
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/** |
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* Constructor. |
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* |
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* @param GeneralName $base |
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* @param int $min |
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* @param null|int $max |
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*/ |
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public function __construct(GeneralName $base, int $min = 0, ?int $max = null) |
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{ |
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$this->_base = $base; |
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$this->_min = $min; |
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$this->_max = $max; |
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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 Sequence $seq |
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* |
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* @return self |
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*/ |
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public static function fromASN1(Sequence $seq): self |
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{ |
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$base = GeneralName::fromASN1($seq->at(0)->asTagged()); |
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$min = 0; |
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$max = null; |
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if ($seq->hasTagged(0)) { |
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1 |
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$min = $seq->getTagged(0)->asImplicit(Element::TYPE_INTEGER) |
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1 |
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->asInteger()->intNumber(); |
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} |
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if ($seq->hasTagged(1)) { |
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1 |
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$max = $seq->getTagged(1)->asImplicit(Element::TYPE_INTEGER) |
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1 |
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->asInteger()->intNumber(); |
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} |
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return new self($base, $min, $max); |
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} |
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/** |
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* Get constraint. |
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* |
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* @return GeneralName |
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*/ |
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5 |
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public function base(): GeneralName |
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{ |
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return $this->_base; |
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} |
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/** |
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* Generate ASN.1 structure. |
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* |
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* @return Sequence |
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*/ |
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public function toASN1(): Sequence |
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{ |
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$elements = [$this->_base->toASN1()]; |
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if (isset($this->_min) && 0 !== $this->_min) { |
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1 |
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$elements[] = new ImplicitlyTaggedType(0, new Integer($this->_min)); |
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} |
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if (isset($this->_max)) { |
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1 |
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$elements[] = new ImplicitlyTaggedType(1, new Integer($this->_max)); |
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} |
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return new Sequence(...$elements); |
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} |
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} |
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sop /
x509
