static void Main(string[] args)
{
int i = 1;
while (i == 1)
{
MainFile mainfile = new MainFile();
readInfoAboutFile(mainfile);
Console.WriteLine("Start - " + DateTime.Now);
FillFile fillFile = new FillFile();
fillFile.fill(mainfile);
SplitFile splitFile = new SplitFile();
List <String> filesname = splitFile.split(mainfile);
SortOneFile sortOneFile = new SortOneFile();
sortOneFile.sortOne(filesname);
SortAllFiles sortAllFiles = new SortAllFiles();
sortAllFiles.sortAll(filesname, mainfile);
Console.WriteLine("Stop - " + DateTime.Now + "\n");
Console.Write("1 - One more time\n0 - Exit\nYour decision - ");
i = int.Parse(Console.ReadLine());
Console.WriteLine();
}
}
public bool Check()
{
Logger.Info("Will check " + this.Path);
bool flag = false;
if (!File.Exists(this.Path))
{
Logger.Error("File missing");
return(false);
}
using (Stream stream = (Stream)File.OpenRead(this.Path))
{
if (stream.Length != this.Size)
{
Logger.Error("File size incorrect: " + stream.Length.ToString());
return(false);
}
if (SplitFile.CheckSum(stream) == this.SHA1)
{
this.DownloadedSize = this.Size;
Logger.Info("File size correct");
flag = true;
}
}
return(flag);
}
private void InitFromFiles(List <string> orderedSplitFiles)
{
_totalLength = 0;
for (int i = 0; i < orderedSplitFiles.Count; i++)
{
var sf = new SplitFile(_fileProvider.GetReadStream(orderedSplitFiles[i]))
{
Filename = orderedSplitFiles[i],
StartOffset = (int)_totalLength
};
_totalLength += sf.Length;
_files.Add(sf);
}
}
public static void decryptFile(BigInteger p, BigInteger x, int sizeOfBlock, string iFileName, string oFileName)
{
var blocks = SplitFile.GetBlocksFromFile(iFileName, sizeOfBlock * 2, false);
long lenght = blocks.Length;
SetMaximum(lenght);
List <BigInteger> newBlocks = new List <BigInteger>();
for (int i = 0; i < blocks.Length; i += 2)
{
SetValue(i);
var a = blocks[i];
var b = blocks[i + 1];
BigInteger m = decrypt(p, x, a, b);
newBlocks.Add(m);
}
SplitFile.WriteBlocksToFile(oFileName, newBlocks.ToArray(), sizeOfBlock, true);
EncodeFinished($"Файл\n{iFileName}\nуспешно дешифрован\n\nСоздан файл\n{oFileName}\nс открытым текстом");
}
public static void Split(string path, int size, SplitFile.ProgressCb progressCb)
{
byte[] buffer = new byte[16384];
using (Stream stream1 = (Stream)File.OpenRead(path))
{
int num = 0;
string.Format((IFormatProvider)CultureInfo.InvariantCulture, "{0}.manifest", (object)path);
while (stream1.Position < stream1.Length)
{
string path1 = string.Format((IFormatProvider)CultureInfo.InvariantCulture, "{0}_part_{1}", (object)path, (object)num);
using (Stream stream2 = (Stream)File.Create(path1))
{
int val1 = size;
int count;
for (; val1 > 0; val1 -= count)
{
count = stream1.Read(buffer, 0, Math.Min(val1, 16384));
if (count != 0)
{
stream2.Write(buffer, 0, count);
}
else
{
break;
}
}
}
string manifest = (string)null;
using (Stream stream2 = (Stream)File.OpenRead(path1))
{
string str = SplitFile.CheckSum(stream2);
long length = stream2.Length;
manifest = string.Format((IFormatProvider)CultureInfo.InvariantCulture, "{0} {1} {2}", (object)Path.GetFileName(path1), (object)length, (object)str);
}
progressCb(manifest);
++num;
}
}
}
public static void cryptFile(BigInteger p, BigInteger g, BigInteger x, int sizeOfBlock, string iFileName, string oFileName)
{
long i = 0;
var y = g.modPow(x, p);
var blocks = SplitFile.GetBlocksFromFile(iFileName, sizeOfBlock, true);
long lenght = blocks.Length;
SetMaximum(lenght);
List <BigInteger> newBlocks = new List <BigInteger>();
foreach (var m in blocks)
{
BigInteger k = (Rand() % (p - 1) + 1);
BigInteger a;
BigInteger b;
crypt(p, g, y, m, out a, out b);
newBlocks.Add(a);
newBlocks.Add(b);
SetValue(i);
i++;
}
SplitFile.WriteBlocksToFile(oFileName, newBlocks.ToArray(), sizeOfBlock * 2, false);
EncodeFinished($"Файл\n{iFileName}\nуспешно зашифрован\n\nСоздан файл\n{oFileName}\nс шифротекстом");
}
/// <summary>
/// Copies a <paramref name="source"/> file to a <paramref name="destination"/> splitting it into segments each sized <paramref name="splitSize"/>
/// </summary>
/// <param name="source">Source <see cref="FileInfo"/> to copy</param>
/// <param name="destination">Destination <see cref="FileInfo"/> to copy to</param>
/// <param name="splitSize">Size of split segments</param>
/// <param name="onWrite">Action will be called everytime theres an advance in bytes with the number of bytes as parameter, to track progress. Can be null.</param>
public static void Copy(FileInfo source, FileInfo destination, long splitSize, Action <long>?onWrite = null)
{
var sourceSplit = new SplitFile(source, splitSize);
var destSplit = new SplitFile(destination, splitSize);
int bound;
if (sourceSplit.SplitInfos.Length > destSplit.SplitInfos.Length)
{
// If source is bigger than destination copy from source at last destination pos to end
bound = destSplit.SplitInfos.Length;
SplitInfo infoSource = sourceSplit.SplitInfos[bound];
using var sourceStream = new FileStream(sourceSplit.File.FullName, FileMode.Open, FileAccess.Read, FileShare.Read);
using var destStream = new FileStream(destSplit.File.FullName, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
sourceStream.Position = infoSource.StartIndex;
destStream.Position = infoSource.StartIndex;
int len = (int)(source.Length - infoSource.StartIndex);
StreamCopy(sourceStream, destStream, len, onWrite);
}
else if (sourceSplit.SplitInfos.Length < destSplit.SplitInfos.Length || sourceSplit.SplitInfos[^ 1].Length < destSplit.SplitInfos[^ 1].Length)
{
// If destination is bigger than source throw away the diff at the end (set length of dest to src)
bound = sourceSplit.SplitInfos.Length;
using var destStream = new FileStream(destSplit.File.FullName, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
destStream.SetLength(source.Length);
}
else
{
// they are the same length w/e
bound = sourceSplit.SplitInfos.Length;
}
// loop to bound, check each split for equality and copy over if needed
Parallel.For(0, bound, (i) =>
{
SplitInfo infoSource = sourceSplit.SplitInfos[i];
SplitInfo infoDest = destSplit.SplitInfos[i];
using var sourceStream = new FileStream(sourceSplit.File.FullName, FileMode.Open, FileAccess.Read, FileShare.Read);
using var destStream = new FileStream(destSplit.File.FullName, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
sourceStream.Position = infoSource.StartIndex;
destStream.Position = infoSource.StartIndex;
// if they are not the same length or not equal copy from src
if (infoSource.Length != infoDest.Length || !FastCompare.Equals(sourceStream, destStream, infoSource.Length))
{
sourceStream.Position = infoSource.StartIndex;
destStream.Position = infoSource.StartIndex;
StreamCopy(sourceStream, destStream, infoSource.Length, onWrite);
}
else
{
onWrite?.Invoke(infoSource.Length);
}
});
}
