const int defaultWipePasses = 1; // Set this to 0 if you are using this on a SSD
public static void EncryptDirectory()
{
Console.WriteLine("Enter the password to encrypt path '{0}' \n",
Path.GetFullPath(dirPathRelative));
string password = "";
while (true)
{
password = AskForPassword("New password".PadLeft(20));
Console.WriteLine("");
string rpassword = AskForPassword("Repeat password".PadLeft(20));
if (password == rpassword)
{
break;
}
else
{
Console.WriteLine("\n\nPasswords do not match! Try again:\n");
}
}
//Create global meta file
string globalMetaFile = Path.Combine(aesPathRelative, encryptedExt + metaExt);
using (FileStream fs = new FileStream(globalMetaFile, FileMode.Create, FileAccess.Write))
{
byte[] salt = AESWrapper.GenerateSalt(16);
fs.Write(salt, 0, salt.Length);
byte[] hash = AESWrapper.Hash(password, salt, 16);
fs.Write(hash, 0, hash.Length);
//fs.Close();
}
Console.WriteLine("\n");
var allfiles = Directory.GetFiles(dirPathRelative);
int maxConcurrency = 8;
List <Task> tasks = new List <Task>();
using (SemaphoreSlim concurrencySemaphore = new SemaphoreSlim(maxConcurrency))
{
foreach (string file in allfiles)
{
//if self ignore
if (Path.GetFileName(file) == Path.GetFileName(System.Reflection.Assembly.GetEntryAssembly().Location))
{
continue;
}
string fileExt = Path.GetExtension(file);
if (fileExt != encryptedExt && fileExt != metaExt)
{
concurrencySemaphore.Wait();
var t = Task.Factory.StartNew(() =>
{
string filename = Path.GetFileName(file);
//Encrypt
try
{
Console.Write("\n>{0}", file);
AESWrapper.EncryptFile(file, Path.Combine(aesPathRelative, filename + encryptedExt), password);
Console.Write(" [encrypted] ");
AESWrapper.WipeFile(file, defaultWipePasses); // Wipe file with X passes (not recommended for SSD)
Console.Write(" [wiped] ");
}
catch (Exception e)
{
Console.WriteLine("'{0}' could not be encrypted.", file);
Console.WriteLine(e);
}
finally
{
concurrencySemaphore.Release();
}
});
tasks.Add(t);
}
}
Task.WaitAll(tasks.ToArray());
}
}
public static void DeleteDecrypted()
{
object passLocker = new object();
string password = null;
var allfiles = Directory.GetFiles(dirPathRelative);
int maxConcurrency = 8;
List <Task> tasks = new List <Task>();
using (SemaphoreSlim concurrencySemaphore = new SemaphoreSlim(maxConcurrency))
{
foreach (string file in allfiles)
{
string fileExt = Path.GetExtension(file);
if (fileExt != encryptedExt && fileExt != metaExt)
{
string filename = Path.GetFileName(file);
if (Path.GetFileName(file) == Path.GetFileName(System.Reflection.Assembly.GetEntryAssembly().Location))
{
continue;
}
string encryptedFile = Path.Combine(aesPathRelative, filename + encryptedExt);
bool encryptedFileExists = File.Exists(encryptedFile);
long metaDate = 0;
concurrencySemaphore.Wait();
var t = Task.Factory.StartNew(() =>
{
if (encryptedFileExists)
{
using (FileStream metafile = new FileStream(encryptedFile + metaExt, FileMode.Open, FileAccess.Read))
{
metafile.Position = 24;
byte[] dateb = new byte[8];
metafile.Read(dateb, 0, dateb.Length);
metaDate = BitConverter.ToInt64(dateb, 0);
}
}
if (encryptedFileExists && File.GetLastWriteTime(file).ToBinary() == metaDate)
{
lock (passLocker)
{
Console.WriteLine("Wiping {0}", file);
}
AESWrapper.WipeFile(file, 1);
}
else
{
lock (passLocker)
{
//New file -> encrypt
if (password == null)
{
string globalMetaFile = Path.Combine(aesPathRelative, encryptedExt + metaExt);
byte[] gsalt = new byte[16];
byte[] ghash = new byte[16];
using (FileStream fs = new FileStream(globalMetaFile, FileMode.Open, FileAccess.Read))
{
fs.Read(gsalt, 0, gsalt.Length);
fs.Read(ghash, 0, ghash.Length);
}
Console.WriteLine("\nEnter the password to encrypt new file'{0}' \n", filename);
password = "";
bool correctPass = false;
do
{
password = AskForPassword("Password".PadLeft(20));
if (AESWrapper.Hash(password, gsalt, 16).SequenceEqual(ghash))
{
correctPass = true;
}
else
{
Console.WriteLine("\n\nWrong password\n");
}
} while (!correctPass);
}
}
if (fileExt != encryptedExt && fileExt != metaExt)
{
//Encrypt
try
{
Console.Write("\n>{0}", file);
AESWrapper.EncryptFile(file, Path.Combine(aesPathRelative, filename + encryptedExt), password);
Console.Write(" [encrypted] ");
AESWrapper.WipeFile(file, 1);
Console.Write(" [wiped] ");
}
catch (Exception e)
{
Console.WriteLine("'{0}' could not be encrypted.", file);
Console.WriteLine(e);
}
}
}
concurrencySemaphore.Release();
});
tasks.Add(t);
}
}
Task.WaitAll(tasks.ToArray());
}
}
public static void DecryptDirectory()
{
//Load global meta file
string globalMetaFile = Path.Combine(aesPathRelative, encryptedExt + metaExt);
byte[] gsalt = new byte[16];
byte[] ghash = new byte[16];
using (FileStream fs = new FileStream(globalMetaFile, FileMode.Open, FileAccess.Read))
{
fs.Read(gsalt, 0, gsalt.Length);
fs.Read(ghash, 0, ghash.Length);
}
Console.WriteLine("Enter the password to decrypt path '{0}' \n", Path.GetFullPath(dirPathRelative));
string password = "";
bool correctPass = false;
do
{
password = AskForPassword("Password".PadLeft(20));
if (AESWrapper.Hash(password, gsalt, 16).SequenceEqual(ghash))
{
correctPass = true;
}
else
{
Console.WriteLine("\nWrong password\n");
}
} while (!correctPass);
var allfiles = Directory.GetFiles(aesPathRelative);
int maxConcurrency = 8;
List <Task> tasks = new List <Task>();
using (SemaphoreSlim concurrencySemaphore = new SemaphoreSlim(maxConcurrency))
{
foreach (string file in allfiles)
{
string fileExt = Path.GetExtension(file);
if (fileExt == encryptedExt)
{
//Decrypt
string filename = Path.GetFileName(file);
string outFile = Path.Combine(dirPathRelative, filename.Remove(filename.Length - encryptedExt.Length));
concurrencySemaphore.Wait();
var t = Task.Factory.StartNew(() =>
{
try
{
Console.Write("\n>{0}", file);
AESWrapper.DecryptFile(file, outFile, password);
Console.Write(" [decrypted] ");
using (FileStream metafile = new FileStream(file + metaExt, FileMode.Open, FileAccess.Write))
{
metafile.Position = 24;
long date = File.GetLastWriteTime(outFile).ToBinary();
byte[] dateb = BitConverter.GetBytes(date);
metafile.Write(dateb, 0, dateb.Length);
}
}
catch (Exception e)
{
Console.WriteLine("'{0}' could not be decrypted.", file);
File.Delete(outFile);
Console.WriteLine(e);
}
finally
{
concurrencySemaphore.Release();
}
});
tasks.Add(t);
}
}
Task.WaitAll(tasks.ToArray());
}
}
