(.NET Core C#) Stream a file to compression to encryption to an output file.

Runs a chain of streams to read a source file, compress, encrypt, and write an output file.

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

bool success;

// Initialize the compression object.
Chilkat.Compression compress = new Chilkat.Compression();
compress.Algorithm = "deflate";

// Initialize the encryption object.
Chilkat.Crypt2 crypt = new Chilkat.Crypt2();
crypt.CryptAlgorithm = "chacha20";
crypt.KeyLength = 256;
crypt.EncodingMode = "hex";
string ivHex = "000000000000000000000002";
crypt.SetEncodedIV(ivHex,"hex");
crypt.InitialCount = 42;
string keyHex = "1c9240a5eb55d38af333888604f6b5f0473917c1402b80099dca5cbc207075c0";
crypt.SetEncodedKey(keyHex,"hex");

// Setup the streams.  
// streamC is for compression
Chilkat.Stream streamC = new Chilkat.Stream();
// streamE is for encryption
Chilkat.Stream streamE = new Chilkat.Stream();

// The source for the compressor is a file.
streamC.SourceFile = "qa_data/hamlet.xml";
// The source for the encryptor is the output of the compressor stream.
success = streamE.SetSourceStream(streamC);

// The sink for the encryptor is the output file.
streamE.SinkFile = "qa_output/compressed_encrypted.dat";

// Start the compression and encryption streams in background threads..
Chilkat.Task taskC = compress.CompressStreamAsync(streamC);
Chilkat.Task taskE = crypt.EncryptStreamAsync(streamE);
success = taskC.Run();
success = taskE.Run();

// Let the streams run until finished.
// Let's make sure the background task finished.
// It should already be the case that the task is finished.
while (((taskE.Finished != true) || (taskC.Finished != true))) {
    taskE.SleepMs(20);
}

// check for success..
if (taskE.TaskSuccess != true) {
    Debug.WriteLine("async encryption failed:");
    Debug.WriteLine(taskE.ResultErrorText);
    success = false;
}

// check for success..
if (taskC.TaskSuccess != true) {
    Debug.WriteLine("async compression failed:");
    Debug.WriteLine(taskC.ResultErrorText);
    success = false;
}

// Load the file that was produced and decrypt/decompress to verify.
Chilkat.BinData binData = new Chilkat.BinData();
success = binData.LoadFile("qa_output/compressed_encrypted.dat");
success = crypt.DecryptBd(binData);
success = compress.DecompressBd(binData);

// binData should contain the original data..
success = binData.WriteFile("qa_output/original_hamlet.xml");

Debug.WriteLine("Finished.");