public static EncryptionInfo?Load(CompoundFile compoundFile)
{
if (compoundFile.RootStorage.TryGetStream("EncryptionInfo", out var stream))
{
var binaryReader = stream.ToBinaryReader();
var encryptionVersionInfo = new VersionData(binaryReader);
if (encryptionVersionInfo.Minor == 0x0002)
{
// Standard Encryption
}
else if (encryptionVersionInfo.Minor == 0x0003)
{
// Extensible Encryption
}
else if (encryptionVersionInfo.Minor == 0x0004)
{
// Agile Encryption
return(new AgileEncryptionInfo(encryptionVersionInfo, binaryReader));
}
return(new EncryptionInfo(stream));
}
return(null);
}
public DataSpaceVersionInfo(CFStream versionStream)
{
VersionStream = versionStream;
var binaryReader = versionStream.ToBinaryReader();
FeatureIdentifier = new LengthPrefixPaddedUnicodeString(binaryReader);
Debug.Assert(FeatureIdentifier.Text == "Microsoft.Container.DataSpaces");
ReaderVersion = new VersionData(binaryReader);
UpdaterVersion = new VersionData(binaryReader);
WriterVersion = new VersionData(binaryReader);
}
public AgileEncryptionInfo(VersionData encryptionVersionInfo, BinaryReader binaryReader) : base(encryptionVersionInfo)
{
Reserved = binaryReader.ReadUInt16();
Debug.Assert(Reserved == 0x00000040);
var byteList =
binaryReader.ReadBytes((int)(binaryReader.BaseStream.Length - binaryReader.BaseStream.Position));
var text = Encoding.UTF8.GetString(byteList);
text = text.Trim('\0');
var xmlSerializer = new XmlSerializer(typeof(Encryption));
var encryption = (Encryption)xmlSerializer.Deserialize(new XmlTextReader(new StringReader(text)));
Encryption = encryption;
}
protected EncryptionInfo(VersionData encryptionVersionInfo)
{
EncryptionVersionInfo = encryptionVersionInfo;
}
