public async Task TestDataProtectionProviderForStream()
{
const string input = "The quick brown fox jumps over the lazy dog.";
var inputStream = new InMemoryRandomAccessStream();
var stream = inputStream.GetOutputStreamAt(0);
using (var writer = new DataWriter(stream))
{
writer.WriteString(input);
await writer.StoreAsync();
await stream.FlushAsync();
}
// Protected data will placed in here.
var protectedStream = new InMemoryRandomAccessStream();
// Protect stream
await dppSvc.ProtectStreamAsync(inputStream.GetInputStreamAt(0),
protectedStream.GetOutputStreamAt(0));
{
DataReader readerI = new DataReader(inputStream.GetInputStreamAt(0));
DataReader readerP = new DataReader(protectedStream.GetInputStreamAt(0));
await readerI.LoadAsync((uint)inputStream.Size);
await readerP.LoadAsync((uint)protectedStream.Size);
IBuffer bufferI = readerI.ReadBuffer((uint)inputStream.Size);
IBuffer bufferP = readerP.ReadBuffer((uint)protectedStream.Size);
// Verify that the protected data does not match the original
Assert.IsFalse(CryptographicBuffer.Compare(bufferI, bufferP), "ProtectStreamAsync returned unprotected data");
}
// Unprotect stream
var unprotectedStream = new InMemoryRandomAccessStream();
// Unprotect stream
await dppSvc.UnprotectStreamAsync(protectedStream.GetInputStreamAt(0),
unprotectedStream.GetOutputStreamAt(0));
{
DataReader readerI = new DataReader(inputStream.GetInputStreamAt(0));
DataReader readerP = new DataReader(unprotectedStream.GetInputStreamAt(0));
await readerI.LoadAsync((uint)inputStream.Size);
await readerP.LoadAsync((uint)unprotectedStream.Size);
IBuffer bufferI = readerI.ReadBuffer((uint)inputStream.Size);
IBuffer bufferP = readerP.ReadBuffer((uint)unprotectedStream.Size);
// Verify that the unprotected data does match the original
Assert.IsTrue(CryptographicBuffer.Compare(bufferI, bufferP));
}
}
private async Task <IBuffer> SampleDataProtectionStream(
String descriptor,
String strMsg,
BinaryStringEncoding encoding)
{
// Create a DataProtectionProvider object for the specified descriptor.
DataProtectionProvider Provider = new DataProtectionProvider(descriptor);
// Convert the input string to a buffer.
IBuffer buffMsg = CryptographicBuffer.ConvertStringToBinary(strMsg, encoding);
// Create a random access stream to contain the plaintext message.
InMemoryRandomAccessStream inputData = new InMemoryRandomAccessStream();
// Create a random access stream to contain the encrypted message.
InMemoryRandomAccessStream protectedData = new InMemoryRandomAccessStream();
// Retrieve an IOutputStream object and fill it with the input (plaintext) data.
IOutputStream outputStream = inputData.GetOutputStreamAt(0);
DataWriter writer = new DataWriter(outputStream);
writer.WriteBuffer(buffMsg);
await writer.StoreAsync();
await outputStream.FlushAsync();
// Retrieve an IInputStream object from which you can read the input data.
IInputStream source = inputData.GetInputStreamAt(0);
// Retrieve an IOutputStream object and fill it with encrypted data.
IOutputStream dest = protectedData.GetOutputStreamAt(0);
await Provider.ProtectStreamAsync(source, dest);
await dest.FlushAsync();
//Verify that the protected data does not match the original
DataReader reader1 = new DataReader(inputData.GetInputStreamAt(0));
DataReader reader2 = new DataReader(protectedData.GetInputStreamAt(0));
await reader1.LoadAsync((uint)inputData.Size);
await reader2.LoadAsync((uint)protectedData.Size);
IBuffer buffOriginalData = reader1.ReadBuffer((uint)inputData.Size);
IBuffer buffProtectedData = reader2.ReadBuffer((uint)protectedData.Size);
if (CryptographicBuffer.Compare(buffOriginalData, buffProtectedData))
{
throw new Exception("ProtectStreamAsync returned unprotected data");
}
// Return the encrypted data.
return(buffProtectedData);
}
public void TestSerializationRoundtripThroughStream()
{
var command = new AppInstallRequest(new AppInstallInfo()
{
AppxPath = "abc", PackageFamilyName = "def", Dependencies = new List <String>()
{
"ghi", "jkl"
}
});
var blob = command.Serialize();
var stream = new InMemoryRandomAccessStream();
blob.WriteToIOutputStreamAsync(stream.GetOutputStreamAt(0)).AsTask().Wait();
var blob2 = Blob.ReadFromIInputStreamAsync(stream.GetInputStreamAt(0)).AsTask().Result;
Assert.AreEqual(blob2.Tag, blob.Tag);
var command2 = blob2.MakeIRequest() as AppInstallRequest;
Assert.IsNotNull(command2);
Assert.AreEqual(command2.Tag, DMMessageKind.InstallApp);
Assert.AreEqual(command2.AppInstallInfo.AppxPath, "abc");
Assert.AreEqual(command2.AppInstallInfo.PackageFamilyName, "def");
Assert.AreEqual(command2.AppInstallInfo.Dependencies[0], "ghi");
Assert.AreEqual(command2.AppInstallInfo.Dependencies[1], "jkl");
}
private async Task saveElementAsync()
{
if (Elements.Count > 0)
{
using (var stream = new InMemoryRandomAccessStream())
{
using (var writer = new DataWriter(stream))
{
foreach (var elem in Elements)
{
if (elem.Content != null)
{
var e = elem.ToBinary();
writer.WriteUInt32((uint)e.Length);
writer.WriteBytes(e);
await writer.StoreAsync();
}
}
using (var reader = new DataReader(stream.GetInputStreamAt(0)))
{
This.Element = new byte[stream.Size];
await reader.LoadAsync((uint)stream.Size);
reader.ReadBytes(This.Element);
}
}
}
}
else
{
This.Element = null;
}
}
private async Task loadElementsAsync()
{
Elements.Clear();
if (This.Element != null)
{
using (var stream = new InMemoryRandomAccessStream())
{
await stream.WriteAsync(This.Element.AsBuffer());
using (var reader = new DataReader(stream.GetInputStreamAt(0)))
{
await reader.LoadAsync((uint)stream.Size);
while (reader.UnconsumedBufferLength > 0)
{
var bytes = new byte[reader.ReadUInt32()];
reader.ReadBytes(bytes);
TextElement element;
if (TextElement.TryParse(bytes, out element))
{
Elements.Add(element);
}
}
}
}
}
}
private async Task savePreviewAsync(int maxWidth = 256, int maxHeight = 256)
{
if (This.Content != null)
{
// a4 pixel size 96 dpi = 794 x 1123
CanvasDevice device = CanvasDevice.GetSharedDevice(true);
CanvasRenderTarget renderTarget = new CanvasRenderTarget(device, 794, 1123, 96);
var mergedStream = new InMemoryRandomAccessStream();
using (var ds = renderTarget.CreateDrawingSession())
{
ds.Clear(Colors.White);
var textContent = Encoding.UTF8.GetString(This.Content);
//CanvasSolidColorBrush textBrush = new CanvasSolidColorBrush(device, Colors.Red);
CanvasTextFormat textFormat = new CanvasTextFormat();
CanvasTextLayout textLayout = new CanvasTextLayout(device, textContent, textFormat, 600, 900);
ds.DrawTextLayout(textLayout, new Vector2(100, 100), Colors.Black);
}
await renderTarget.SaveAsync(mergedStream, CanvasBitmapFileFormat.Jpeg);
//StorageFile between = await DownloadsFolder.CreateFileAsync("between.jpg", CreationCollisionOption.GenerateUniqueName);
//using (var fileStream = await between.OpenAsync(FileAccessMode.ReadWrite))
//{
// await RandomAccessStream.CopyAsync(mergedStream, fileStream);
//}
// scaling result
BitmapDecoder decoder = await BitmapDecoder.CreateAsync(mergedStream);
using (var previewStream = new InMemoryRandomAccessStream())
{
BitmapEncoder encoder = await BitmapEncoder.CreateForTranscodingAsync(previewStream, decoder);
var ratioWidth = (double)maxWidth / decoder.PixelWidth;
var ratioHeight = (double)maxHeight / decoder.PixelHeight;
var ratioScale = Math.Min(ratioWidth, ratioHeight);
var aspectHeight = (uint)(ratioScale * decoder.PixelHeight);
var aspectWidth = (uint)(ratioScale * decoder.PixelWidth);
//encoder.BitmapTransform.InterpolationMode = BitmapInterpolationMode.Linear;
encoder.BitmapTransform.ScaledHeight = aspectHeight;
encoder.BitmapTransform.ScaledWidth = aspectWidth;
await encoder.FlushAsync();
// write result to preview
using (var reader = new DataReader(previewStream.GetInputStreamAt(0)))
{
This.Preview = new byte[previewStream.Size];
await reader.LoadAsync((uint)previewStream.Size);
reader.ReadBytes(This.Preview);
}
//StorageFile previewFile = await DownloadsFolder.CreateFileAsync("preview.jpg", CreationCollisionOption.GenerateUniqueName);
//await FileIO.WriteBytesAsync(previewFile, This.Preview);
}
}
}
public async void WriteXml(XmlWriter writer)
{
writer.WriteElementString("Title", Title);
writer.WriteElementString("Description", Description);
writer.WriteElementString("Status", Status.ToString());
writer.WriteStartElement("Stokes");
if (Strokes != null && Strokes.Count > 0)
{
using (InMemoryRandomAccessStream ms = new InMemoryRandomAccessStream())
{
InkStrokeContainer inkCont = new InkStrokeContainer();
foreach (InkStroke stroke in Strokes)
{
inkCont.AddStroke(stroke.Clone());
}
await inkCont.SaveAsync(ms);
await ms.FlushAsync();
byte[] bytes = new byte[ms.Size];
//var dataWriter = new DataWriter(ms);
var reader = new DataReader(ms.GetInputStreamAt(0));
await reader.LoadAsync((uint)ms.Size);
reader.ReadBytes(bytes);
writer.WriteBinHex(bytes, 0, (int)ms.Size);
}
}
writer.WriteEndElement();
}
public void TestReadFromIInputStream()
{
var command = new AppInstallRequest(new AppInstallInfo()
{
AppxPath = "abc", PackageFamilyName = "def", Dependencies = new List <String>()
{
"ghi", "jkl"
}
});
var dataArray = command.Serialize().GetByteArrayForSerialization();
var dataSizeArray = BitConverter.GetBytes((UInt32)dataArray.Length);
var stream = new InMemoryRandomAccessStream();
stream.WriteAsync(dataSizeArray.AsBuffer()).AsTask().Wait();
stream.WriteAsync(dataArray.AsBuffer()).AsTask().Wait();
var result = Blob.ReadFromIInputStreamAsync(stream.GetInputStreamAt(0)).AsTask().Result;
Assert.AreEqual(result.Tag, DMMessageKind.InstallApp);
var request = result.MakeIRequest() as AppInstallRequest;
Assert.AreEqual(request.Tag, DMMessageKind.InstallApp);
Assert.AreEqual(request.AppInstallInfo.AppxPath, "abc");
Assert.AreEqual(request.AppInstallInfo.PackageFamilyName, "def");
Assert.AreEqual(request.AppInstallInfo.Dependencies[0], "ghi");
Assert.AreEqual(request.AppInstallInfo.Dependencies[1], "jkl");
}
private static async Task <byte[]> GetImageAsByteArray(SoftwareBitmap image)
{
using (var stream = new InMemoryRandomAccessStream())
{
var encoder = await BitmapEncoder.CreateAsync(
BitmapEncoder.JpegEncoderId, stream);
encoder.SetSoftwareBitmap(image);
// Scale the image to 720p to make sure we don't exceed API size limits
var maxDimension = Math.Max(image.PixelHeight, image.PixelWidth);
var sf = 1280f / maxDimension;
encoder.BitmapTransform.ScaledWidth = (uint)(image.PixelHeight * sf);
encoder.BitmapTransform.ScaledHeight = (uint)(image.PixelWidth * sf);
await encoder.FlushAsync();
var reader = new DataReader(stream.GetInputStreamAt(0));
var byteArr = new byte[stream.Size];
await reader.LoadAsync((uint)stream.Size);
reader.ReadBytes(byteArr);
return(byteArr);
}
}
public async Task <Dictionary <uint, byte[]> > LoadOverlayAsync()
{
var result = new Dictionary <uint, byte[]>();
if (This.Overlay != null)
{
using (var stream = new InMemoryRandomAccessStream())
{
await stream.WriteAsync(This.Overlay.AsBuffer());
using (var reader = new DataReader(stream.GetInputStreamAt(0)))
{
await reader.LoadAsync((uint)stream.Size);
while (0 < reader.UnconsumedBufferLength)
{
var index = reader.ReadUInt32();
var length = reader.ReadUInt32();
var content = reader.ReadBuffer(length);
result[index] = content.ToArray();
}
}
}
}
return(result);
}
public async Task <string> UnprotectStringAsync(string protectedString)
{
var provider = this.GetDataProtectionProvider();
IBuffer buffUnprotectedData;
using (InMemoryRandomAccessStream unprotectedData = new InMemoryRandomAccessStream())
using (InMemoryRandomAccessStream inputData = new InMemoryRandomAccessStream())
{
IOutputStream outputStream = inputData.GetOutputStreamAt(0);
using (DataWriter writer = new DataWriter(outputStream))
{
writer.WriteBuffer(Convert.FromBase64String(protectedString).AsBuffer());
await writer.StoreAsync();
await outputStream.FlushAsync();
}
IInputStream source = inputData.GetInputStreamAt(0);
IOutputStream dest = unprotectedData.GetOutputStreamAt(0);
await provider.UnprotectStreamAsync(source, dest);
await dest.FlushAsync();
using (DataReader reader = new DataReader(unprotectedData.GetInputStreamAt(0)))
{
await reader.LoadAsync((uint)unprotectedData.Size);
buffUnprotectedData = reader.ReadBuffer((uint)unprotectedData.Size);
}
}
return(CryptographicBuffer.ConvertBinaryToString(Encoding, buffUnprotectedData));
}
// 根据当前请求的 uri 返回对应的内容流
private async Task <IInputStream> GetContent(Uri uri)
{
string path = uri.AbsolutePath;
string responseString = "";
switch (path)
{
case "/Controls/WebViewDemo/demo4.html":
StorageFile fileRead = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx://" + path, UriKind.Absolute));
return(await fileRead.OpenAsync(FileAccessMode.Read));
case "/Controls/WebViewDemo/css.css":
responseString = "b { color: red; }";
break;
default:
break;
}
// string 转 IInputStream
IBuffer buffer = CryptographicBuffer.ConvertStringToBinary(responseString, BinaryStringEncoding.Utf8);
var stream = new InMemoryRandomAccessStream();
await stream.WriteAsync(buffer);
return(stream.GetInputStreamAt(0));
}
/// <summary>
/// Helper that produces the contents corresponding to a Uri.
/// Uses the C# await pattern to coordinate async operations.
/// </summary>
/// <param name="uri"></param>
/// <returns></returns>
private async Task <IInputStream> GetContentAsync(Uri uri)
{
string path = uri.AbsolutePath;
string contents;
switch (path)
{
case "/default.html":
contents = await MainPage.LoadStringFromPackageFileAsync("stream_example.html");
contents = contents.Replace("%", Windows.ApplicationModel.Package.Current.Id.Name);
break;
case "/stream.css":
contents = "p { color: blue; }";
break;
default:
throw new Exception($"Could not resolve URI \"{uri}\"");
}
// Convert the string to a stream.
IBuffer buffer = CryptographicBuffer.ConvertStringToBinary(contents, BinaryStringEncoding.Utf8);
var stream = new InMemoryRandomAccessStream();
await stream.WriteAsync(buffer);
return(stream.GetInputStreamAt(0));
}
/// <summary>
/// Compresses the content and returns it as an input stream.
/// </summary>
/// <returns>A <see cref="IInputStream"/> implementation containing the compresssed data.</returns>
public IAsyncOperationWithProgress <IInputStream, ulong> ReadAsInputStreamAsync()
{
return(AsyncInfo.Run <IInputStream, ulong>(async(cancellationToken, progress) =>
{
await BufferAllAsync().AsTask().ConfigureAwait(false);
var randomAccessStream = new InMemoryRandomAccessStream();
try
{
using (var writer = new DataWriter(randomAccessStream))
{
writer.WriteBuffer(bufferedData);
uint bytesStored = await writer.StoreAsync().AsTask(cancellationToken);
// Make sure that the DataWriter destructor does not close the stream.
writer.DetachStream();
// Report progress.
progress.Report(randomAccessStream.Size);
return randomAccessStream.GetInputStreamAt(0);
}
}
catch
{
randomAccessStream?.Dispose();
throw;
}
}));
}
/// <summary>
/// Helper that cracks the path and resolves the Uri
/// Uses the C# await pattern to coordinate async operations
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
private async Task <IInputStream> getContent(string path)
{
ChmFile obj;
if (!_chmFile.TryGetTarget(out obj))
{
throw new Exception();
}
byte[] data = await obj.GetData(path);
if (data == null || data.Length == 0)
{
throw new Exception();
}
using (var memoryStream = new InMemoryRandomAccessStream())
{
using (var dataWriter = new DataWriter(memoryStream))
{
dataWriter.UnicodeEncoding = Windows.Storage.Streams.UnicodeEncoding.Utf8;
dataWriter.ByteOrder = ByteOrder.LittleEndian;
dataWriter.WriteBytes(data);
if (IsHtml(path))
{
dataWriter.WriteBytes(GetInjectedContent());
}
await dataWriter.StoreAsync();
await dataWriter.FlushAsync();
dataWriter.DetachStream();
}
return(memoryStream.GetInputStreamAt(0));
}
}
private async Task <IInputStream> GetInputStreamFromIOStream(Stream stream, long fileSize)
{
try
{
using (BinaryReader binReader = new BinaryReader(stream))
{
byte[] byteArr = binReader.ReadBytes((int)fileSize);
using (var iMS = new InMemoryRandomAccessStream())
{
var imsOutputStream = iMS.GetOutputStreamAt(0);
using (DataWriter dataWriter = new DataWriter(imsOutputStream))
{
dataWriter.WriteBytes(byteArr);
await dataWriter.StoreAsync();
await imsOutputStream.FlushAsync();
return(iMS.GetInputStreamAt(0));
}
}
}
}
catch (Exception ex)
{
PlatformAdapter.SendToCustomLogger(ex, LoggingLevel.Error);
return(null);
}
}
private async void ProtectStreamAsync_Click(object sender, RoutedEventArgs e)
{
string outputStr = "";
Byte[] byteStream = { 1, 2, 3, 4, 5 };
InMemoryRandomAccessStream randomAccessStream = new InMemoryRandomAccessStream();
IOutputStream outputStream = randomAccessStream.GetOutputStreamAt(0);
var writer = new DataWriter(outputStream);
writer.WriteBytes(byteStream);
await writer.StoreAsync();
IInputStream source = randomAccessStream.GetInputStreamAt(0);
m_protectedStream = new InMemoryRandomAccessStream();
IOutputStream destination = m_protectedStream.GetOutputStreamAt(0);
await DataProtectionManager.ProtectStreamAsync(source, Scenario1.m_enterpriseId, destination);
var reader = new DataReader(m_protectedStream.GetInputStreamAt(0));
await reader.LoadAsync((uint)m_protectedStream.Size);
IBuffer protectedStreamBuffer = reader.ReadBuffer((uint)m_protectedStream.Size);
outputStr += "\n Protected Stream buffer:" + CryptographicBuffer.EncodeToHexString(protectedStreamBuffer);
rootPage.NotifyUser(outputStr, NotifyType.StatusMessage);
}
private async void setimg()
{
try
{
System.Xml.Linq.XDocument xmlDoc = XDocument.Load("http://www.bing.com/HPImageArchive.aspx?format=xml&idx=0&n=1&mkt=en-US");
IEnumerable <string> strTest = from node in xmlDoc.Descendants("url") select node.Value;
string strURL = "http://www.bing.com" + strTest.First();
Uri source = new Uri(strURL);
var bitmapImage = new BitmapImage();
var httpClient = new HttpClient();
var httpResponse = await httpClient.GetAsync(source);
byte[] b = await httpResponse.Content.ReadAsByteArrayAsync();
using (var stream = new InMemoryRandomAccessStream())
{
using (DataWriter dw = new DataWriter(stream))
{
dw.WriteBytes(b);
await dw.StoreAsync();
stream.Seek(0);
bitmapImage.SetSource(stream);
Image1.Source = bitmapImage;
var storageFile = await KnownFolders.PicturesLibrary.CreateFileAsync("CGPA_Bing.jpg", CreationCollisionOption.ReplaceExisting);
using (var storageStream = await storageFile.OpenAsync(FileAccessMode.ReadWrite))
{
await RandomAccessStream.CopyAndCloseAsync(stream.GetInputStreamAt(0), storageStream.GetOutputStreamAt(0));
}
}
}
}
catch (Exception) { readimg(); }
}
//public async Task OpenRemote(string pdfUrl) {
// var client = new System.Net.Http.HttpClient();
// using(var stream = await client.GetStreamAsync(pdfUrl)) {
// using(var memStream = new MemoryStream()) {
// await stream.CopyToAsync(memStream);
// memStream.Position = 0;
// _doc = await PdfDocument.LoadFromStreamAsync(memStream.AsRandomAccessStream());
// }
// }
//}
#endregion
public async Task TakeAShot(PdfDocument doc, string name)
{
var fld = ApplicationData.Current.LocalFolder;
if (!name.Contains(".pdf"))
{
name += ".pdf";
}
try {
await fld.GetFileAsync(name + ".jpg");
}
catch (FileNotFoundException) {
var r = new PdfPageRenderOptions {
DestinationHeight = 190, DestinationWidth = 160
};
using (var stream = new InMemoryRandomAccessStream()) {
try {
await doc.GetPage(0).RenderToStreamAsync(stream, r);
var fll = await fld.CreateFileAsync(name + ".jpg", CreationCollisionOption.ReplaceExisting);
using (var fs = await fll.OpenAsync(FileAccessMode.ReadWrite)) {
await RandomAccessStream.CopyAndCloseAsync(stream.GetInputStreamAt(0), fs.GetOutputStreamAt(0));
}
}
catch {
Helper.GarbageCollector();
}
}
}
}
public async Task <byte[]> Decrypt(byte[] encryptedBytes)
{
var provider = new DataProtectionProvider();
var encryptedContentBuffer = CryptographicBuffer.CreateFromByteArray(encryptedBytes);
var contentInputStream = new InMemoryRandomAccessStream();
var unprotectedContentStream = new InMemoryRandomAccessStream();
IOutputStream outputStream = contentInputStream.GetOutputStreamAt(0);
var dataWriter = new DataWriter(outputStream);
dataWriter.WriteBuffer(encryptedContentBuffer);
await dataWriter.StoreAsync();
await dataWriter.FlushAsync();
IInputStream decodingInputStream = contentInputStream.GetInputStreamAt(0);
IOutputStream protectedOutputStream = unprotectedContentStream.GetOutputStreamAt(0);
await provider.UnprotectStreamAsync(decodingInputStream, protectedOutputStream);
await protectedOutputStream.FlushAsync();
DataReader reader2 = new DataReader(unprotectedContentStream.GetInputStreamAt(0));
await reader2.LoadAsync((uint)unprotectedContentStream.Size);
IBuffer unprotectedBuffer = reader2.ReadBuffer((uint)unprotectedContentStream.Size);
return(unprotectedBuffer.ToArray());
}
public byte[] DrawStrokeOnImageBackground(IReadOnlyList <InkStroke> strokes, byte[] backgroundImageBuffer)
{
var stmbuffer = new InMemoryRandomAccessStream();
stmbuffer.AsStreamForWrite().AsOutputStream().WriteAsync(backgroundImageBuffer.AsBuffer()).AsTask().Wait();
CanvasDevice device = CanvasDevice.GetSharedDevice();
var canbit = CanvasBitmap.LoadAsync(device, stmbuffer, 96).AsTask().Result;
CanvasRenderTarget renderTarget = new CanvasRenderTarget(device, canbit.SizeInPixels.Width, canbit.SizeInPixels.Height, 96);
using (var ds = renderTarget.CreateDrawingSession())
{
ds.Clear(Colors.Transparent);
if (backgroundImageBuffer != null)
{
ds.DrawImage(canbit);
}
ds.DrawInk(strokes);
}
var stm = new InMemoryRandomAccessStream();
renderTarget.SaveAsync(stm, CanvasBitmapFileFormat.Png).AsTask().Wait();
var readfrom = stm.GetInputStreamAt(0).AsStreamForRead();
var ms = new MemoryStream();
readfrom.CopyTo(ms);
var outputBuffer = ms.ToArray();
return(outputBuffer);
}
public static async Task <bool> GetIsMakerImageAsync()
{
var cmdOutput = string.Empty;
var standardOutput = new InMemoryRandomAccessStream();
var options = new ProcessLauncherOptions
{
StandardOutput = standardOutput
};
var output = await ProcessLauncher.RunToCompletionAsync(CommandLineProcesserExe, RegKeyQueryCmdArg, options);
if (output != null && output.ExitCode == 0)
{
using (var outStreamRedirect = standardOutput.GetInputStreamAt(0))
{
using (var dataReader = new DataReader(outStreamRedirect))
{
uint bytesLoaded = 0;
while ((bytesLoaded = await dataReader.LoadAsync(CmdLineBufSize)) > 0)
{
cmdOutput += dataReader.ReadString(bytesLoaded);
}
}
}
Match match = Regex.Match(cmdOutput, ExpectedResultPattern, RegexOptions.IgnoreCase);
if (match.Success)
{
return(true);
}
else
{
ServiceUtil.LogService.Write("Could not get IsMakerImage. Output: " + cmdOutput);
}
}
return(false);
}
async void OnCameraPreviewTapped(object sender, TappedRoutedEventArgs e)
{
var stream = new InMemoryRandomAccessStream();
if (isPreviewing)
{
await mediaCapture.StopPreviewAsync();
await mediaCapture.CapturePhotoToStreamAsync(ImageEncodingProperties.CreateJpeg(), stream);
// transforma em bytes
var reader = new DataReader(stream.GetInputStreamAt(0));
var bytes = new byte[stream.Size];
await reader.LoadAsync((uint)stream.Size);
reader.ReadBytes(bytes);
Xamarin.Forms.DependencyService.Get <ICameraOption>().ImagemCapturada(bytes);
isPreviewing = false;
}
else
{
await mediaCapture.StartPreviewAsync();
isPreviewing = true;
}
}
public async Task SaveInkToBase64(InkCanvasControl view, IReadOnlyList <object> commandArgs)
{
var inkCanvas = view.FindName("MyInkCanvas") as InkCanvas;
string base64String = string.Empty;
CanvasDevice device = CanvasDevice.GetSharedDevice();
CanvasRenderTarget renderTarget = new CanvasRenderTarget(device, (int)inkCanvas.ActualWidth, (int)inkCanvas.ActualHeight, 96);
using (var ds = renderTarget.CreateDrawingSession())
{
ds.Clear(Colors.White);
ds.DrawInk(inkCanvas.InkPresenter.StrokeContainer.GetStrokes());
}
using (InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream())
{
await renderTarget.SaveAsync(stream, CanvasBitmapFileFormat.Jpeg);
var reader = new DataReader(stream.GetInputStreamAt(0));
await reader.LoadAsync((uint)stream.Size);
byte[] byteArray = new byte[stream.Size];
reader.ReadBytes(byteArray);
base64String = Convert.ToBase64String(byteArray);
}
InkSaved?.Invoke(view, base64String);
}
private async void UnprotectAsyncBuffer_Click(object sender, RoutedEventArgs e)
{
string outputStr = "";
if (m_protectedStream != null)
{
IInputStream source = m_protectedStream.GetInputStreamAt(0);
m_unprotectedStream = new InMemoryRandomAccessStream();
await DataProtectionManager.UnprotectStreamAsync(source,
m_unprotectedStream
);
var unprotectedReader = new DataReader(m_unprotectedStream.GetInputStreamAt(0));
await unprotectedReader.LoadAsync((uint)m_unprotectedStream.Size);
IBuffer unprotectedStreamBuffer = unprotectedReader.ReadBuffer((uint)m_unprotectedStream.Size);
outputStr += "\n UnProtected Stream buffer:" +
CryptographicBuffer.EncodeToHexString(unprotectedStreamBuffer);
rootPage.NotifyUser(outputStr, NotifyType.StatusMessage);
}
else
{
rootPage.NotifyUser("Please protect a stream to unprotect", NotifyType.ErrorMessage);
}
}
private static async Task <bool> DownloadArtistPictureFromDeezer(MusicLibraryViewModel.ArtistItem artist)
{
var deezerClient = new DeezerClient();
var deezerArtist = await deezerClient.GetArtistInfo(artist.Name);
if (deezerArtist == null)
{
return(false);
}
if (deezerArtist.Images == null)
{
return(false);
}
try
{
var clientPic = new HttpClient();
HttpResponseMessage responsePic = await clientPic.GetAsync(deezerArtist.Images.LastOrDefault().Url);
string uri = responsePic.RequestMessage.RequestUri.AbsoluteUri;
// A cheap hack to avoid using Deezers default image for bands.
if (uri.Equals("http://cdn-images.deezer.com/images/artist//400x400-000000-80-0-0.jpg"))
{
return(false);
}
byte[] img = await responsePic.Content.ReadAsByteArrayAsync();
InMemoryRandomAccessStream streamWeb = new InMemoryRandomAccessStream();
DataWriter writer = new DataWriter(streamWeb.GetOutputStreamAt(0));
writer.WriteBytes(img);
await writer.StoreAsync();
StorageFolder artistPic = await ApplicationData.Current.LocalFolder.CreateFolderAsync("artistPic",
CreationCollisionOption.OpenIfExists);
string fileName = artist.Name + "_" + "dPi";
var file = await artistPic.CreateFileAsync(fileName + ".jpg", CreationCollisionOption.OpenIfExists);
var raStream = await file.OpenAsync(FileAccessMode.ReadWrite);
using (var thumbnailStream = streamWeb.GetInputStreamAt(0))
{
using (var stream = raStream.GetOutputStreamAt(0))
{
await RandomAccessStream.CopyAsync(thumbnailStream, stream);
}
}
StorageFolder appDataFolder = ApplicationData.Current.LocalFolder;
string supposedPictureUriLocal = appDataFolder.Path + "\\artistPic\\" + artist.Name + "_" + "dPi" + ".jpg";
await DispatchHelper.InvokeAsync(() => artist.Picture = supposedPictureUriLocal);
return(true);
}
catch (Exception)
{
Debug.WriteLine("Error getting or saving art from deezer.");
return(false);
}
}
public async Task <byte[]> Encrypt(byte[] data)
{
var provider = new DataProtectionProvider(UseForAllUsers ? _localMachineDescriptor : _localUserDescriptor);
var contentBuffer = CryptographicBuffer.CreateFromByteArray(data);
var contentInputStream = new InMemoryRandomAccessStream();
var protectedContentStream = new InMemoryRandomAccessStream();
//storing data in the stream
IOutputStream outputStream = contentInputStream.GetOutputStreamAt(0);
var dataWriter = new DataWriter(outputStream);
dataWriter.WriteBuffer(contentBuffer);
await dataWriter.StoreAsync();
await dataWriter.FlushAsync();
//reopening in input mode
IInputStream encodingInputStream = contentInputStream.GetInputStreamAt(0);
IOutputStream protectedOutputStream = protectedContentStream.GetOutputStreamAt(0);
await provider.ProtectStreamAsync(encodingInputStream, protectedOutputStream);
await protectedOutputStream.FlushAsync();
//verify that encryption happened
var inputReader = new DataReader(contentInputStream.GetInputStreamAt(0));
var protectedReader = new DataReader(protectedContentStream.GetInputStreamAt(0));
await inputReader.LoadAsync((uint)contentInputStream.Size);
await protectedReader.LoadAsync((uint)protectedContentStream.Size);
var inputBuffer = inputReader.ReadBuffer((uint)contentInputStream.Size);
var protectedBuffer = protectedReader.ReadBuffer((uint)protectedContentStream.Size);
if (!CryptographicBuffer.Compare(inputBuffer, protectedBuffer))
{
return(protectedBuffer.ToArray());
}
else
{
return(null);
}
}
public void TestWriteToOutputStream()
{
var command = new AppInstallRequest(new AppInstallInfo()
{
AppxPath = "abc", PackageFamilyName = "def", Dependencies = new List <String>()
{
"ghi", "jkl"
}
});
var blob = command.Serialize();
var stream = new InMemoryRandomAccessStream();
blob.WriteToIOutputStreamAsync(stream.GetOutputStreamAt(0)).AsTask().Wait();
var reader = new DataReader(stream.GetInputStreamAt(0));
reader.LoadAsync(4).AsTask().Wait();
var bytes = new byte[4];
reader.ReadBytes(bytes);
var size = BitConverter.ToUInt32(bytes, 0);
// like I said, too brittle:
//Assert.AreEqual(size, 44U); // this is somewhat brittle.
var reader2 = new DataReader(stream.GetInputStreamAt(4));
reader2.LoadAsync(size).AsTask().Wait();
var bytes2 = new byte[size];
reader2.ReadBytes(bytes2);
var blob2 = Blob.CreateFromByteArray(bytes2);
Assert.AreEqual(blob.Tag, blob2.Tag);
var command2 = blob2.MakeIRequest() as AppInstallRequest;
Assert.AreEqual(command2.Tag, DMMessageKind.InstallApp);
Assert.AreEqual(command2.AppInstallInfo.AppxPath, "abc");
Assert.AreEqual(command2.AppInstallInfo.PackageFamilyName, "def");
Assert.AreEqual(command2.AppInstallInfo.Dependencies[0], "ghi");
Assert.AreEqual(command2.AppInstallInfo.Dependencies[1], "jkl");
}
public static async Task <ProcessLauncherOutput> RunCommandAsync(string fileName, string args)
{
var output = new ProcessLauncherOutput();
try
{
using (var standardOutput = new InMemoryRandomAccessStream())
using (var standardError = new InMemoryRandomAccessStream())
{
var options = new ProcessLauncherOptions
{
StandardOutput = standardOutput,
StandardError = standardError
};
var result = await ProcessLauncher.RunToCompletionAsync(
fileName,
args,
options);
output.Result = result;
using (IInputStream inputStream = standardOutput.GetInputStreamAt(0))
{
ulong size = standardOutput.Size;
using (var dataReader = new DataReader(inputStream))
{
uint bytesLoaded = await dataReader.LoadAsync((uint)size);
output.Output = dataReader.ReadString(bytesLoaded);
}
}
using (IInputStream inputStream = standardError.GetInputStreamAt(0))
{
ulong size = standardError.Size;
using (var dataReader = new DataReader(inputStream))
{
uint bytesLoaded = await dataReader.LoadAsync((uint)size);
output.Error = dataReader.ReadString(bytesLoaded);
}
}
}
return(output);
}
catch (Exception ex)
{
ServiceUtil.LogService.WriteException(ex);
}
return(null);
}
private async Task RunProcess()
{
var options = new ProcessLauncherOptions();
var standardOutput = new InMemoryRandomAccessStream();
var standardError = new InMemoryRandomAccessStream();
options.StandardOutput = standardOutput;
options.StandardError = standardError;
await CoreWindow.GetForCurrentThread().Dispatcher.RunAsync(CoreDispatcherPriority.Normal, async() =>
{
try
{
var result = await ProcessLauncher.RunToCompletionAsync(cmd.Text, args.Text == null ? string.Empty : args.Text, options);
ProcessExitCode.Text += "Process Exit Code: " + result.ExitCode;
using (var outStreamRedirect = standardOutput.GetInputStreamAt(0))
{
var size = standardOutput.Size;
using (var dataReader = new DataReader(outStreamRedirect))
{
var bytesLoaded = await dataReader.LoadAsync((uint)size);
var stringRead = dataReader.ReadString(bytesLoaded);
StdOutputText.Text += stringRead;
}
}
using (var errStreamRedirect = standardError.GetInputStreamAt(0))
{
using (var dataReader = new DataReader(errStreamRedirect))
{
var size = standardError.Size;
var bytesLoaded = await dataReader.LoadAsync((uint)size);
var stringRead = dataReader.ReadString(bytesLoaded);
StdErrorText.Text += stringRead;
}
}
}
catch (UnauthorizedAccessException uex)
{
StdErrorText.Text += "Exception Thrown: " + uex.Message + "\n";
StdErrorText.Text += "\nMake sure you're allowed to run the specified exe; either\n" +
"\t1) Add the exe to the AppX package, or\n" +
"\t2) Add the absolute path of the exe to the allow list:\n" +
"\t\tHKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\EmbeddedMode\\ProcessLauncherAllowedExecutableFilesList.\n\n" +
"Also, make sure the <iot:Capability Name=\"systemManagement\" /> has been added to the AppX manifest capabilities.\n";
}
catch (Exception ex)
{
StdErrorText.Text += "Exception Thrown:" + ex.Message + "\n";
StdErrorText.Text += ex.StackTrace + "\n";
}
});
}
