private static void CompressionFile(string sourcePath, string folderToZippedFile, bool compress = true)
{
const int bufferSize = 16834;
byte[] buffer = new byte[bufferSize];
string destPath = Path.Combine(folderToZippedFile, Path.GetFileName(sourcePath) + ".gz");
MyFile sourceFile;
if (Factory.TryGetFile(sourcePath, out sourceFile))
{
MyFile outFile = Factory.CreateFile(destPath);
using (Stream inFileStream = sourceFile.FileOpen(FileMode.Open, FileAccess.Read, FileShare.Read))
using (Stream outFileStream = outFile.FileOpen(FileMode.Create, FileAccess.Write, FileShare.Read))
using (GZipStream gZipStream = new GZipStream(compress ? outFileStream : inFileStream, compress ? CompressionMode.Compress : CompressionMode.Decompress))
{
Stream inStream = compress ? inFileStream : gZipStream;
Stream outStream = compress ? gZipStream : outFileStream;
int bytesRead = 0;
do
{
bytesRead = inStream.Read(buffer, 0, bufferSize);
outStream.Write(buffer, 0, bytesRead);
} while (bytesRead > 0);
}
}
}
public override void Visit(MyFile file)
{
if (crypt)
{
using (FileStream fin = file.FileOpen(FileMode.Open, FileAccess.Read, FileShare.None))
{
MyFile cryptedFile = Factory.CreateFile(file.FullPath + "_crypted");
using (FileStream fout = cryptedFile.FileOpen(FileMode.OpenOrCreate, FileAccess.Write, FileShare.None))
{
fout.SetLength(0);
//Create variables to help with read and write.
byte[] bin = new byte[100]; //This is intermediate storage for the encryption.
long rdlen = 0; //This is the total number of bytes written.
long totlen = fin.Length; //This is the total length of the input file.
int len; //This is the number of bytes to be written at a time.
DES des = new DESCryptoServiceProvider();
using (CryptoStream encStream = new CryptoStream(fout, desProvider.CreateEncryptor(desKey, desIV), CryptoStreamMode.Write))
{
//Read from the input file, then encrypt and write to the output file.
while (rdlen < totlen)
{
len = fin.Read(bin, 0, 100);
encStream.Write(bin, 0, len);
rdlen = rdlen + len;
}
}
}
}
file.Delete();
}
else
{
bool success = true;
using (FileStream fin = file.FileOpen(FileMode.Open, FileAccess.Read, FileShare.None))
{
MyFile decryptedFile;
string pathToCryptedFile = file.FullPath;
if (pathToCryptedFile.EndsWith("_crypted"))
{
decryptedFile = Factory.CreateFile(file.FullPath.Remove(pathToCryptedFile.Length - "_crypted".Length));
}
else
{
decryptedFile = Factory.CreateFile(pathToCryptedFile + "_decrypted");
}
using (FileStream fout = decryptedFile.FileOpen(FileMode.OpenOrCreate, FileAccess.Write, FileShare.None))
{
fout.SetLength(0);
//Create variables to help with read and write.
byte[] bin = new byte[100]; //This is intermediate storage for the encryption.
long rdlen = 0; //This is the total number of bytes written.
long totlen = fin.Length; //This is the total length of the input file.
int len; //This is the number of bytes to be written at a time.
DES des = new DESCryptoServiceProvider();
try
{
using (CryptoStream encStream = new CryptoStream(fout, desProvider.CreateDecryptor(desKey, desIV), CryptoStreamMode.Write))
{
//Read from the input file, then decrypt and write to the output file.
while (rdlen < totlen)
{
len = fin.Read(bin, 0, 100);
encStream.Write(bin, 0, len);
rdlen = rdlen + len;
}
}
}
catch (CryptographicException exc)
{
System.Windows.Forms.MessageBox.Show(exc.Message + "Неверный ключ.");
success = false;
}
catch (IOException ioexc)
{
System.Windows.Forms.MessageBox.Show(ioexc.Message + "Ошибка доступа.");
}
catch (Exception exc)
{
System.Windows.Forms.MessageBox.Show(exc.Message + "Неопознанная ошибка.");
}
}
if (!success)
{
decryptedFile.Delete();
}
}
if (success)
{
file.Delete();
}
}
}
