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 $parsedObject;
}
public static function fromBinary(&$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 Sequence(new Boolean(true), new Integer(123));
$originalObject2 = new Sequence(new Integer(64), new Boolean(false));
$binaryData = $originalObject1->getBinary();
$binaryData .= $originalObject2->getBinary();
$offset = 0;
$parsedObject = Sequence::fromBinary($binaryData, $offset);
$this->assertEquals($originalObject1, $parsedObject);
$this->assertEquals(8, $offset);
$parsedObject = Sequence::fromBinary($binaryData, $offset);
$this->assertEquals($originalObject2, $parsedObject);
$this->assertEquals(16, $offset);
}
// this should contain a sequence of extensions
$certExtensions = $certExtensions->getFirstChild();
assert($certExtensions->getType() == Identifier::SEQUENCE);
// now check all extensions and search for the SAN
/** @var Object $extensionSequence */
foreach ($certExtensions as $extensionSequence) {
assert($extensionSequence->getType() == Identifier::SEQUENCE);
assert($extensionSequence->getNumberofChildren() >= 2);
$extensionSequenceChildren = $extensionSequence->getChildren();
$objectIdentifier = $extensionSequenceChildren[0];
/* @var ObjectIdentifier $objectIdentifier */
assert($objectIdentifier->getType() == Identifier::OBJECT_IDENTIFIER);
if ($objectIdentifier->getContent() == OID::CERT_EXT_SUBJECT_ALT_NAME) {
// now we have the wanted octet string
$octetString = $extensionSequenceChildren[1];
/* @var OctetString $octetString */
$octetStringBinary = $octetString->getBinaryContent();
// At this point you may want to create the sequence from the binary value of
// the octet string and parse its structure like we did so far.
// However a more general approach would be to understand the format of the
// contained SAN fields and implement them in SubjectAlternativeNames.
$sequence = Sequence::fromBinary($octetStringBinary);
echo 'This is the parsed content of the SAN certificate extension field so far:' . PHP_EOL;
printObject($sequence);
// The following does not work yet because PHPASN1 SAn does only support DNS and IP
//SubjectAlternativeNames::fromBinary($octetStringBinary);
}
}
} catch (\Exception $exception) {
echo '[ERROR] Caught exception:' . PHP_EOL . $exception->getMessage() . PHP_EOL;
}
/**
* @param string $binaryData
* @param int $offsetIndex
*
* @throws ParserException
*
* @return \FG\ASN1\Object
*/
public static function fromBinary(&$binaryData, &$offsetIndex = 0)
{
if (strlen($binaryData) <= $offsetIndex) {
throw new ParserException('Can not parse binary from data: Offset index larger than input size', $offsetIndex);
}
$identifierOctet = ord($binaryData[$offsetIndex]);
if (Identifier::isContextSpecificClass($identifierOctet) && Identifier::isConstructed($identifierOctet)) {
return ExplicitlyTaggedObject::fromBinary($binaryData, $offsetIndex);
}
switch ($identifierOctet) {
case Identifier::BITSTRING:
return BitString::fromBinary($binaryData, $offsetIndex);
case Identifier::BOOLEAN:
return Boolean::fromBinary($binaryData, $offsetIndex);
case Identifier::ENUMERATED:
return Enumerated::fromBinary($binaryData, $offsetIndex);
case Identifier::INTEGER:
return Integer::fromBinary($binaryData, $offsetIndex);
case Identifier::NULL:
return NullObject::fromBinary($binaryData, $offsetIndex);
case Identifier::OBJECT_IDENTIFIER:
return ObjectIdentifier::fromBinary($binaryData, $offsetIndex);
case Identifier::RELATIVE_OID:
return RelativeObjectIdentifier::fromBinary($binaryData, $offsetIndex);
case Identifier::OCTETSTRING:
return OctetString::fromBinary($binaryData, $offsetIndex);
case Identifier::SEQUENCE:
return Sequence::fromBinary($binaryData, $offsetIndex);
case Identifier::SET:
return Set::fromBinary($binaryData, $offsetIndex);
case Identifier::UTC_TIME:
return UTCTime::fromBinary($binaryData, $offsetIndex);
case Identifier::GENERALIZED_TIME:
return GeneralizedTime::fromBinary($binaryData, $offsetIndex);
case Identifier::IA5_STRING:
return IA5String::fromBinary($binaryData, $offsetIndex);
case Identifier::PRINTABLE_STRING:
return PrintableString::fromBinary($binaryData, $offsetIndex);
case Identifier::NUMERIC_STRING:
return NumericString::fromBinary($binaryData, $offsetIndex);
case Identifier::UTF8_STRING:
return UTF8String::fromBinary($binaryData, $offsetIndex);
case Identifier::UNIVERSAL_STRING:
return UniversalString::fromBinary($binaryData, $offsetIndex);
case Identifier::CHARACTER_STRING:
return CharacterString::fromBinary($binaryData, $offsetIndex);
case Identifier::GENERAL_STRING:
return GeneralString::fromBinary($binaryData, $offsetIndex);
case Identifier::VISIBLE_STRING:
return VisibleString::fromBinary($binaryData, $offsetIndex);
case Identifier::GRAPHIC_STRING:
return GraphicString::fromBinary($binaryData, $offsetIndex);
case Identifier::BMP_STRING:
return BMPString::fromBinary($binaryData, $offsetIndex);
case Identifier::T61_STRING:
return T61String::fromBinary($binaryData, $offsetIndex);
case Identifier::OBJECT_DESCRIPTOR:
return ObjectDescriptor::fromBinary($binaryData, $offsetIndex);
default:
// At this point the identifier may be >1 byte.
if (Identifier::isConstructed($identifierOctet)) {
return new UnknownConstructedObject($binaryData, $offsetIndex);
} else {
$identifier = self::parseBinaryIdentifier($binaryData, $offsetIndex);
$lengthOfUnknownObject = self::parseContentLength($binaryData, $offsetIndex);
$offsetIndex += $lengthOfUnknownObject;
return new UnknownObject($identifier, $lengthOfUnknownObject);
}
}
}
mk+8uP4/x61UWBliqW08/1jMA83Qj2yuCAvhMhmuq8BvyWP4jnXoxTy3iTZFDXIj
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RvvJTezSQeCoLpX7HziRnoVUNkJWZHL2wG5rb/SJzpXwHkRa7R250vN8TFtSSsp4
YXzK6aks/qkxRJ1UkBLUAZlRasUD+zu8gyTIz0sNgFrOtx8EOzjZRiJ/vBiVOn88
Brf4i0D+fVXmJQIDAQABow8wDTALBgNVHQ8EBAMCAAIwCwYJKoZIhvcNAQEFA4IB
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6UJCfLo1u6Dn4zuuDs3m6if86HTpAf9Z3a72ok2Tor/NFwYt+vDOrFY5F4bXDZkf
u4zuDLmjpj26Dk4te3BVohsLTXbvJ5a/TT2VanwNOyx85lXPxy3V8Rr1AwlmHZoz
DDbUGbe/noUDJCgMjvaKKvLykIhIcW+g6W7SOcKRflw5H8kzDv816XFODSC3X1Uw
o3aVy9du/0mH+g4HvyVVplO90tdoHD1gHUMZwuen4dbTzhWv4dtLFelWM5lGWbLE
Wn7kJghclgIxv10nkGyfrowt';
// OCSP response status according to
// https://tools.ietf.org/html/rfc6960#section-4.2.1
$validResponseStatuses = array(0 => 'Response has valid confirmations', 1 => 'Illegal confirmation request', 2 => 'Internal error in issuer', 3 => 'Try again later', 5 => 'Must sign the request', 6 => 'Request unauthorized');
$ocspResponse = Sequence::fromBinary(base64_decode($data));
/* @var Enumerated $responseStatus */
$elements = $ocspResponse->getChildren();
$responseStatus = $elements[0];
$responseStatusCode = $responseStatus->getContent();
echo PHP_EOL;
echo "OCSP response status: {$responseStatusCode} ({$validResponseStatuses[$responseStatusCode]})" . PHP_EOL;
/** @var ExplicitlyTaggedObject $responseBytes */
$responseBytes = $elements[1];
/** @var Sequence $responseBytesSequence */
$responseBytesSequence = $responseBytes->getContent();
/** @var ObjectIdentifier $responseType */
$responseType = $responseBytesSequence->getChildren()[0];
echo "ResponseType: {$responseType}" . PHP_EOL;
$response = $responseBytesSequence->getChildren()[1];
echo "Response (octet string): {$response}" . PHP_EOL;