/**
* Initialize from ASN.1.
*
* @param Sequence $seq
* @throws \UnexpectedValueException
* @return self
*/
public static function fromASN1(Sequence $seq)
{
$version = $seq->at(0)->asInteger()->number();
if ($version != self::VERSION_1) {
throw new \UnexpectedValueException("Version {$version} not supported.");
}
$subject = Name::fromASN1($seq->at(1)->asSequence());
$pkinfo = PublicKeyInfo::fromASN1($seq->at(2)->asSequence());
$obj = new self($subject, $pkinfo);
if ($seq->hasTagged(0)) {
$obj->_attributes = Attributes::fromASN1($seq->getTagged(0)->asImplicit(Element::TYPE_SET)->asSet());
}
return $obj;
}
/**
* Initialize from ASN.1.
*
* @param Sequence $seq
* @return self
*/
public static function fromASN1(Sequence $seq)
{
$idx = 0;
if ($seq->hasTagged(0)) {
$idx++;
$version = intval($seq->getTagged(0)->asExplicit()->asInteger()->number());
} else {
$version = self::VERSION_1;
}
$serial = $seq->at($idx++)->asInteger()->number();
$algo = AlgorithmIdentifier::fromASN1($seq->at($idx++)->asSequence());
if (!$algo instanceof SignatureAlgorithmIdentifier) {
throw new \UnexpectedValueException("Unsupported signature algorithm " . $algo->oid() . ".");
}
$issuer = Name::fromASN1($seq->at($idx++)->asSequence());
$validity = Validity::fromASN1($seq->at($idx++)->asSequence());
$subject = Name::fromASN1($seq->at($idx++)->asSequence());
$pki = PublicKeyInfo::fromASN1($seq->at($idx++)->asSequence());
$tbs_cert = new self($subject, $pki, $issuer, $validity);
$tbs_cert->_version = $version;
$tbs_cert->_serialNumber = $serial;
$tbs_cert->_signature = $algo;
if ($seq->hasTagged(1)) {
$tbs_cert->_issuerUniqueID = UniqueIdentifier::fromASN1($seq->getTagged(1)->asImplicit(Element::TYPE_BIT_STRING)->asBitString());
}
if ($seq->hasTagged(2)) {
$tbs_cert->_subjectUniqueID = UniqueIdentifier::fromASN1($seq->getTagged(2)->asImplicit(Element::TYPE_BIT_STRING)->asBitString());
}
if ($seq->hasTagged(3)) {
$tbs_cert->_extensions = Extensions::fromASN1($seq->getTagged(3)->asExplicit()->asSequence());
}
return $tbs_cert;
}
/**
*
* @param UnspecifiedType $el
* @return self
*/
public static function fromChosenASN1(UnspecifiedType $el)
{
return new self(Name::fromASN1($el->asSequence()));
}
