internal static async Task EncryptAsync(CryptoRequest request)
{
CryptoContainer container = request.ValidateEncryption();
ReportAndCancellationToken token = request.Token ?? new ReportAndCancellationToken();
token.CanReportProgress = request.InData.CanSeek;
using (var aes = GetAes())
using (var encryptor = GetEncryptorAndSetAes(aes, request))
{
int bufferSize = aes.BlockSize;
if (token.CanReportProgress ?? false)
{
token.NumberOfIterations = (int)Math.Ceiling(request.InData.Length / (double)bufferSize);
}
CryptoStream cs = new CryptoStream(request.OutData, encryptor, CryptoStreamMode.Write);
byte[] buffer = new byte[bufferSize];
int read = 0;
int iterationCount = 0;
while ((read = await request.InData.ReadAsync(buffer, 0, bufferSize)) > 0)
{
await cs.WriteAsync(buffer, 0, read);
await cs.FlushAsync();
if (token.IsCanceled)
{
break;
}
iterationCount++;
token.ReportProgressInternal(iterationCount);
}
if (token.IsCanceled)
{
return;
}
cs.FlushFinalBlock();
}
if (!request.SkipValidations)
{
await container.WriteChecksAndEmbeddedDataAsync();
}
}
internal static void Decrypt(CryptoRequest request)
{
CryptoContainer container = request.ValidateDecrypt(request);
ReportAndCancellationToken token = request.Token ?? new ReportAndCancellationToken();
token.CanReportProgress = request.InData.CanSeek;
using (var aes = GetAes())
using (ICryptoTransform decryptor = GetDecryptorAndSetAes(aes, request))
{
int bufferSize = aes.BlockSize;
if (token.CanReportProgress ?? false)
{
token.NumberOfIterations = (int)Math.Ceiling(request.InData.Length / (double)bufferSize);
}
CryptoStream cs = new CryptoStream(request.OutData, decryptor, CryptoStreamMode.Write);
byte[] buffer = new byte[bufferSize];
int read = 0;
int iterationCount = 0;
while ((read = request.InData.Read(buffer, 0, bufferSize)) > 0)
{
cs.Write(buffer, 0, read);
cs.Flush();
if (token.IsCanceled)
{
break;
}
iterationCount++;
token.ReportProgressInternal(iterationCount);
}
if (token.IsCanceled)
{
return;
}
cs.FlushFinalBlock();
}
}
