public static function fromBinary(&$binaryData, &$offsetIndex = 0) { self::parseIdentifier($binaryData[$offsetIndex], Identifier::SET, $offsetIndex++); self::parseContentLength($binaryData, $offsetIndex); $tmpOffset = $offsetIndex; $extensions = Sequence::fromBinary($binaryData, $offsetIndex); $tmpOffset += 1 + $extensions->getNumberOfLengthOctets(); $parsedObject = new self(); foreach ($extensions as $extension) { if ($extension->getType() != Identifier::SEQUENCE) { //FIXME wrong offset index throw new ParserException('Could not parse Certificate Extensions: Expected ASN.1 Sequence but got ' . $extension->getTypeName(), $offsetIndex); } $tmpOffset += 1 + $extension->getNumberOfLengthOctets(); $children = $extension->getChildren(); if (count($children) < 2) { throw new ParserException('Could not parse Certificate Extensions: Needs at least two child elements per extension sequence (object identifier and octet string)', $tmpOffset); } /** @var \FG\ASN1\Object $objectIdentifier */ $objectIdentifier = $children[0]; /** @var OctetString $octetString */ $octetString = $children[1]; if ($objectIdentifier->getType() != Identifier::OBJECT_IDENTIFIER) { throw new ParserException('Could not parse Certificate Extensions: Expected ASN.1 Object Identifier but got ' . $extension->getTypeName(), $tmpOffset); } $tmpOffset += $objectIdentifier->getObjectLength(); if ($objectIdentifier->getContent() == OID::CERT_EXT_SUBJECT_ALT_NAME) { $sans = SubjectAlternativeNames::fromBinary($binaryData, $tmpOffset); $parsedObject->addSubjectAlternativeNames($sans); } else { // can now only parse SANs. There might be more in the future $tmpOffset += $octetString->getObjectLength(); } } $parsedObject->getBinary(); // Determine the number of content octets and object sizes once (just to let the equality unit tests pass :/ ) return $parsedObject; }