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;
}
/**
* @depends testFromBinary
*/
public function testFromBinaryWithOffset()
{
$originalObject1 = new SubjectAlternativeNames();
$originalObject1->addDomainName(new DNSName('corvespace.de'));
$originalObject1->addIP(new IPAddress('192.168.0.1'));
$originalObject1->addIP(new IPAddress('10.218.0.1'));
$originalObject2 = new SubjectAlternativeNames();
$originalObject2->addDomainName(new DNSName('google.com'));
$binaryData = $originalObject1->getBinary();
$binaryData .= $originalObject2->getBinary();
$offset = 0;
$parsedObject = SubjectAlternativeNames::fromBinary($binaryData, $offset);
$this->assertEquals($originalObject1, $parsedObject);
$this->assertEquals(31, $offset);
$parsedObject = SubjectAlternativeNames::fromBinary($binaryData, $offset);
$this->assertEquals($originalObject2, $parsedObject);
$this->assertEquals(47, $offset);
}
