private async Task StoreDataAsync(FileIdentifier id, Stream dataStream, UploadPassword passwordSetting, CancellationToken cancellationToken)
{
UploadProgress progress = this.GetProgressObject(id);
// Copy with progress
using (Stream outputStream = this._fileWriter.OpenWriteStream(this._fileStore.GetDataFile(id))) {
if (passwordSetting.Enable == true && !String.IsNullOrEmpty(passwordSetting.Password))
{
using (Aes crypto = CryptoFactory.CreateCrypto(passwordSetting.Password)) {
ICryptoTransform encryptor = crypto.CreateEncryptor();
CryptoMetadata.WriteMetadata(outputStream, crypto);
using (CryptoStream cryptoStream = new CryptoStream(outputStream, encryptor, CryptoStreamMode.Write, true)) {
await CopyStreamWithProgress(cryptoStream);
}
}
}
else
{
await CopyStreamWithProgress(outputStream);
}
}
async Task CopyStreamWithProgress(Stream outputStream)
{
using (Stream inputStream = dataStream) {
int read;
byte[] buffer = new byte[4096];
while ((read = await inputStream.ReadAsync(buffer, 0, buffer.Length, cancellationToken).ConfigureAwait(false)) != 0)
{
progress.Current += read;
await outputStream.WriteAsync(buffer, 0, read, cancellationToken).ConfigureAwait(false);
}
}
}
}
public static Stream Create(UploadedFile file, string password)
{
Stream fileStream = file.GetStream();
Aes? crypto = null;
try {
crypto = CryptoMetadata.ReadMetadataAndInitializeAlgorithm(fileStream, password);
CryptoStream cryptoStream = new CryptoStream(
fileStream,
crypto.CreateDecryptor(),
CryptoStreamMode.Read,
false
);
return(new CryptoStreamWrapper(crypto, cryptoStream));
}
catch (Exception) {
fileStream.Dispose();
crypto?.Dispose();
throw;
}
}
