private Stream GetCryptoStream(File file, FileUploadedDelegate onUploaded)
{
var info = CryptoUtil.GetCryptoKeyAndSalt(_cloud.Account.Credentials.PasswordCrypt);
var xts = XtsAes256.Create(info.Key, info.IV);
file.ServiceInfo.CryptInfo = new CryptInfo
{
PublicKey = new CryptoKeyInfo {
Salt = info.Salt, IV = info.IV
},
AlignBytes = (uint)(file.Size % XTSWriteOnlyStream.BlockSize != 0
? XTSWriteOnlyStream.BlockSize - file.Size % XTSWriteOnlyStream.BlockSize
: 0)
};
var size = file.OriginalSize % XTSWriteOnlyStream.BlockSize == 0
? file.OriginalSize.DefaultValue
: (file.OriginalSize / XTSWriteOnlyStream.BlockSize + 1) * XTSWriteOnlyStream.BlockSize;
var ustream = new SplittedUploadStream(file.FullPath, _cloud, size, false, file.ServiceInfo.CryptInfo);
if (onUploaded != null)
{
ustream.FileUploaded += onUploaded;
}
// ReSharper disable once RedundantArgumentDefaultValue
var encustream = new XTSWriteOnlyStream(ustream, xts, XTSWriteOnlyStream.DefaultSectorSize);
return(encustream);
}
public async Task <Stream> Create(File file, FileUploadedDelegate onUploaded = null, bool discardEncryption = false)
{
if (!(await _cloud.GetItemAsync(file.Path, Cloud.ItemType.Folder) is Folder folder))
{
throw new DirectoryNotFoundException(file.Path);
}
Stream stream;
bool cryptRequired = _cloud.IsFileExists(CryptFileInfo.FileName, WebDavPath.GetParents(folder.FullPath).ToList()).Any();
if (cryptRequired && !discardEncryption)
{
if (!_cloud.Account.Credentials.CanCrypt)
{
throw new Exception($"Cannot upload {file.FullPath} to crypt folder without additional password!");
}
// #142 remove crypted file parts if size changed
var remoteFile = folder.Files.FirstOrDefault(f => f.FullPath == file.FullPath);
if (remoteFile != null)
{
await _cloud.Remove(remoteFile);
}
stream = GetCryptoStream(file, onUploaded);
}
else
{
stream = GetPlainStream(file, onUploaded);
}
return(stream);
}
public async Task <Stream> Create(File file, FileUploadedDelegate onUploaded = null, bool discardEncryption = false)
{
if (!(await _cloud.GetItemAsync(file.Path, MailRuCloud.ItemType.Folder) is Folder folder))
{
throw new DirectoryNotFoundException(file.Path);
}
Stream stream;
bool cryptRequired = _cloud.IsFileExists(CryptFileInfo.FileName, WebDavPath.GetParents(folder.FullPath).ToList()).Any();
if (cryptRequired && !discardEncryption)
{
if (!_cloud.Account.Credentials.CanCrypt)
{
throw new Exception($"Cannot upload {file.FullPath} to crypt folder without additional password!");
}
stream = GetCryptoStream(file, onUploaded);
}
else
{
stream = GetPlainStream(file, onUploaded);
}
return(stream);
}
private Stream GetPlainStream(File file, FileUploadedDelegate onUploaded)
{
var stream = new SplittedUploadStream(file.FullPath, _cloud, file.Size);
if (onUploaded != null)
{
stream.FileUploaded += onUploaded;
}
return(stream);
}
