public void WriteTest3()
{
var key = new byte[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
var ctr = new byte[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
var content = new byte[] { 0x66, 0xe9, 0x4b, 0xd4, 0xef, 0x8a, 0x2c, 0x3b, 0x88, 0x4c, 0xfa, 0x59, 0xca, 0x34, 0x2b, 0x2e };
var expected = new byte[] { 0x66, 0xe9, 0x4b, 0xd4, 0xef, 0x8a, 0x2c, 0x3b, 0x88, 0x4c, 0xfa, 0x59, 0xca, 0x34, 0x2b, 0x2e,
0x58, 0xf3, 0xed, 0xce, 0xfa, 0x7e, 0x30, 0x61, 0x36, 0x7f, 0x1d, 0x57, 0xa4, 0xe7, 0x45, 0x5a };
var ms = new MemoryStream();
ms.Write(content, 0, content.Length);
ms.Position = 0;
var ctrS = new CtrStream(ms, key, ctr, false);
ctrS.Position = 17;
ctrS.Write(new byte[] { 0x11, 0x11 }, 0, 2);
var actualLength = ctrS.Length;
ctrS.Flush();
var flushedLength = ctrS.Length;
Assert.IsTrue(ms.ToArray().SequenceEqual(expected));
Assert.AreEqual(32, ctrS.Length);
Assert.AreEqual(19, actualLength);
Assert.AreEqual(32, flushedLength);
Assert.AreEqual(0, ms.Position);
}
public void WriteTest1()
{
var key = new byte[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
var ctr = new byte[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
var content = new byte[] { 0x66, 0xe9, 0x4b, 0xd4, 0xef, 0x8a, 0x2c, 0x3b, 0x88, 0x4c, 0xfa, 0x59, 0xca, 0x34, 0x2b, 0x2e };
var expected = new byte[] { 0x66, 0xe9, 0x4b, 0xc5, 0xfe, 0x8a, 0x2c, 0x3b, 0x88, 0x4c, 0xfa, 0x59, 0xca, 0x34, 0x2b, 0x2e };
var ms = new MemoryStream(content);
var ctrS = new CtrStream(ms, key, ctr, false);
ctrS.Position = 3;
ctrS.Write(new byte[] { 0x11, 0x11 }, 0, 2);
ctrS.Flush();
Assert.IsTrue(ms.ToArray().SequenceEqual(expected));
Assert.AreEqual(5, ctrS.Position);
Assert.AreEqual(0, ms.Position);
}
private Task <bool> DoCipher(Stream input, Stream output, IProgress <ProgressReport> progress, bool decrypt)
{
var key = OnRequestKey("AES128 Ctr Key", 32, out var error);
if (key == null)
{
return(Task.Factory.StartNew(() =>
{
progress.Report(new ProgressReport {
Percentage = 0, Message = error
});
return false;
}));
}
var ctr = OnRequestKey("AES128 Ctr IV", 32, out error);
if (ctr == null)
{
return(Task.Factory.StartNew(() =>
{
progress.Report(new ProgressReport {
Percentage = 0, Message = error
});
return false;
}));
}
return(Task.Factory.StartNew(() =>
{
progress.Report(new ProgressReport {
Percentage = 0, Message = decrypt ? "Decryption..." : "Encryption..."
});
using (var cs = new CtrStream(decrypt ? input : output, key, ctr, true))
{
var buffer = new byte[0x10000];
var totalLength = decrypt ? cs.Length : input.Length;
while (cs.Position < totalLength)
{
var length = (int)Math.Min(0x10000, totalLength - cs.Position);
if (decrypt)
{
cs.Read(buffer, 0, length);
output.Write(buffer, 0, length);
}
else
{
input.Read(buffer, 0, length);
cs.Write(buffer, 0, length);
}
progress.Report(new ProgressReport {
Percentage = (double)cs.Position / totalLength * 100, Message = decrypt ? "Decryption..." : "Encryption...",
});
}
}
progress.Report(new ProgressReport {
Percentage = 100, Message = decrypt ? "Decryption finished." : "Encryption finished."
});
return true;
}));
}
