public void GetWindowsRuntimeBuffer_EmptyStream_ThrowsArgumentException()
{
using (var stream = new MemoryStream())
{
Assert.Throws <ArgumentException>(null, () => WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(stream, 0, 0));
}
}
public void GetWindowsRuntimeBuffer_NonWritableStream_ThrowsUnauthorizedAccessException()
{
var memoryStream = new MemoryStream(new byte[10], false);
Assert.Throws <UnauthorizedAccessException>(() => WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(memoryStream));
Assert.Throws <UnauthorizedAccessException>(() => WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(memoryStream, 0, 0));
}
public void GetWindowsRuntimeBuffer_Stream_Success(byte[] bytes, int positionInStream, int length)
{
using (var stream = new MemoryStream())
{
stream.Write(bytes, 0, bytes.Length);
stream.Position = 0;
if (positionInStream == 0 && length == bytes.Length)
{
Verify(WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(stream), bytes, positionInStream, length, stream.Capacity);
}
stream.Position = 0;
Verify(WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(stream, positionInStream, length), bytes, positionInStream, length, length);
}
}
public static IBuffer ToBuffer(this IRandomAccessStream randomStream)
{
Stream stream = WindowsRuntimeStreamExtensions.AsStreamForRead(randomStream.GetInputStreamAt(0));
var memoryStream = new MemoryStream();
if (stream != null)
{
byte[] bytes = stream.ToByteArray();
if (bytes != null)
{
var binaryWriter = new BinaryWriter(memoryStream);
binaryWriter.Write(bytes);
}
}
return(WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(memoryStream, 0, (int)memoryStream.Length));
}
public static IBuffer Stream2Buffer(Stream stream)
{
MemoryStream memoryStream = new MemoryStream();
if (stream != null)
{
byte[] bytes = Stream2Bytes(stream);
if (bytes != null)
{
var binaryWriter = new BinaryWriter(memoryStream);
binaryWriter.Write(bytes);
}
}
IBuffer buffer = WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(memoryStream, 0, (int)memoryStream.Length);
return(buffer);
}
public static IBuffer RandomAccessStream2Buffer(IRandomAccessStream randomStream)
{
Stream stream = WindowsRuntimeStreamExtensions.AsStreamForRead(randomStream.GetInputStreamAt(0));
MemoryStream memoryStream = new MemoryStream();
if (stream != null)
{
byte[] bytes = Stream2Bytes(stream);
if (bytes != null)
{
var binaryWriter = new BinaryWriter(memoryStream);
binaryWriter.Write(bytes);
}
}
IBuffer buffer = WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(memoryStream, 0, (int)memoryStream.Length);
return(buffer);
}
/// <summary>
/// Read a stream and return it's MD5, does not reset or close the stream.
/// </summary>
/// <param name="stream"></param>
/// <returns></returns>
public static string GetMD5(this Stream stream)
{
#if NETFX_CORE
var alg = HashAlgorithmProvider.OpenAlgorithm("MD5");
IBuffer buff;
if (stream is MemoryStream)
{
buff = WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(stream as MemoryStream);
}
else //In case it returned a non-Memory stream.
{
MemoryStream ms = new MemoryStream();
CopyStream(stream, ms);
buff = WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(ms);
}
var hashed = alg.HashData(buff);
return(CryptographicBuffer.EncodeToHexString(hashed));
#else
MD5CryptoServiceProvider csp = new MD5CryptoServiceProvider();
byte[] hash = csp.ComputeHash(stream);
return(BitConverter.ToString(hash).Replace("-", "").ToLower());
#endif
}
/// <inheritdoc />
public override void ForwardProcessDataStream(System.IO.Stream inStream, System.IO.Stream outStream, Dictionary <string, string> options, out long writtenBytes)
{
if (options == null)
{
throw new ArgumentNullException("options");
}
else if (!options.ContainsKey(PasswordOption))
{
throw new ArgumentException("Options must contain encryption key", "options");
}
if (outStream == null)
{
throw new ArgumentNullException("outStream");
}
#if NETFX_CORE
inStream.Seek(0, 0);
outStream.Seek(0, 0);
IBuffer pwBuffer = CryptographicBuffer.ConvertStringToBinary(options[PasswordOption], BinaryStringEncoding.Utf8);
IBuffer saltBuffer = CryptographicBuffer.CreateFromByteArray(SALT);
// Derive key material for password size 32 bytes for AES256 algorithm
KeyDerivationAlgorithmProvider keyDerivationProvider = Windows.Security.Cryptography.Core.KeyDerivationAlgorithmProvider.OpenAlgorithm("PBKDF2_SHA1");
// using salt and 1000 iterations
KeyDerivationParameters pbkdf2Parms = KeyDerivationParameters.BuildForPbkdf2(saltBuffer, 1000);
// create a key based on original key and derivation parmaters
CryptographicKey keyOriginal = keyDerivationProvider.CreateKey(pwBuffer);
IBuffer keyMaterial = CryptographicEngine.DeriveKeyMaterial(keyOriginal, pbkdf2Parms, 32);
CryptographicKey derivedPwKey = keyDerivationProvider.CreateKey(pwBuffer);
// derive buffer to be used for encryption salt from derived password key
IBuffer saltMaterial = CryptographicEngine.DeriveKeyMaterial(derivedPwKey, pbkdf2Parms, 16);
// display the buffers - because KeyDerivationProvider always gets cleared after each use, they are very similar unforunately
string keyMaterialString = CryptographicBuffer.EncodeToBase64String(keyMaterial);
string saltMaterialString = CryptographicBuffer.EncodeToBase64String(saltMaterial);
SymmetricKeyAlgorithmProvider symProvider = SymmetricKeyAlgorithmProvider.OpenAlgorithm("AES_CBC_PKCS7");
// create symmetric key from derived password key
CryptographicKey symmKey = symProvider.CreateSymmetricKey(keyMaterial);
using (MemoryStream ms = new MemoryStream())
{
inStream.CopyTo(ms);
// encrypt data buffer using symmetric key and derived salt material
IBuffer resultBuffer = CryptographicEngine.Encrypt(symmKey, WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(ms), saltMaterial);
resultBuffer.AsStream().CopyTo(outStream);
writtenBytes = outStream.Position;
}
#else
Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(options[PasswordOption], SALT);
var key = pdb.GetBytes(32);
pdb.Reset();
var iv = pdb.GetBytes(16);
using (var transform = encrypter.CreateEncryptor(key, iv))
{
using (MemoryStream internalStream = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(internalStream, transform, CryptoStreamMode.Write))
{
StreamTools.Write(inStream, csEncrypt);
inStream.Flush();
csEncrypt.FlushFinalBlock();
internalStream.Seek(0, 0);
StreamTools.Write(internalStream, outStream);
writtenBytes = outStream.Position;
}
}
}
#endif
}
public void GetWindowsRuntimeBuffer_BufferWithLengthGreaterThanIntMax_Throws()
{
var memoryStream = new SubMemoryStream(10);
WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(memoryStream, 0, 0);
}
public void GetWindowsRuntimeBuffer_PositonInStreamGreaterOrEqualToCapacity_ThrowsArgumentException(int positionInStream)
{
var memoryStream = new MemoryStream(1);
AssertExtensions.Throws <ArgumentException>(null, () => WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(memoryStream, positionInStream, 0));
}
public void GetWindowsRuntimeBuffer_NegativeLength_ThrowsArgumentOufOfRangeException()
{
var memoryStream = new MemoryStream();
AssertExtensions.Throws <ArgumentOutOfRangeException>("length", () => WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(memoryStream, 0, -1));
}
public void GetWindowsRuntimeBuffer_NegativePositionInStream_ThrowsArgumentOufOfRangeException()
{
var memoryStream = new MemoryStream();
AssertExtensions.Throws <ArgumentOutOfRangeException>("positionInStream", () => WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(memoryStream, -1, 0));
}
public void GetWindowsRuntimeBuffer_NullStream_ThrowsArgumentNullException()
{
AssertExtensions.Throws <ArgumentNullException>("underlyingStream", () => WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(null));
AssertExtensions.Throws <ArgumentNullException>("underlyingStream", () => WindowsRuntimeBufferExtensions.GetWindowsRuntimeBuffer(null, 0, 0));
}