public static function fromBinary(&$binaryData, &$offsetIndex = 0) { self::parseIdentifier($binaryData[$offsetIndex], Identifier::OCTETSTRING, $offsetIndex++); $contentLength = self::parseContentLength($binaryData, $offsetIndex); if ($contentLength < 2) { throw new ParserException('Can not parse Subject Alternative Names: The Sequence within the octet string after the Object identifier ' . OID::CERT_EXT_SUBJECT_ALT_NAME . " is too short ({$contentLength} octets)", $offsetIndex); } $offsetOfSequence = $offsetIndex; $sequence = Sequence::fromBinary($binaryData, $offsetIndex); $offsetOfSequence += $sequence->getNumberOfLengthOctets() + 1; if ($sequence->getObjectLength() != $contentLength) { throw new ParserException('Can not parse Subject Alternative Names: The Sequence length does not match the length of the surrounding octet string', $offsetIndex); } $parsedObject = new self(); /** @var \FG\ASN1\Object $object */ foreach ($sequence as $object) { if ($object->getType() == DNSName::IDENTIFIER) { $domainName = DNSName::fromBinary($binaryData, $offsetOfSequence); $parsedObject->addDomainName($domainName); } elseif ($object->getType() == IPAddress::IDENTIFIER) { $ip = IPAddress::fromBinary($binaryData, $offsetOfSequence); $parsedObject->addIP($ip); } else { throw new ParserException('Could not parse Subject Alternative Name: Only DNSName and IP SANs are currently supported', $offsetIndex); } } $parsedObject->getBinary(); // Determine the number of content octets and object sizes once (just to let the equality unit tests pass :/ ) return $parsedObject; }