private void decryptButton_Click(object sender, EventArgs e)
{
string password = Interaction.InputBox("Enter password to decrypt file(s)", "Decrypt File(s)");
if (password == "")
{
return;
}
if (!this._db[this._id].checkPassphrase(password))
{
MessageBox.Show("Wrong Password. Please re-enter your password.", "Password Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
List <string> successList = new List <string>();
List <string> failureList = new List <string>();
EventHandler decryptEvent = new EventHandler(delegate(object o, EventArgs a)
{
TreeNode node = (TreeNode)o;
string path = node.FullPath;
FileInfo fileInfo = new FileInfo(path);
try
{
if (fileInfo.Extension != ".enc")
{
throw new Exception("Cannot decrypt because of wrong type of file.");
}
byte[] data = DataEncryption.decrypt(this._db[this._id], password, File.ReadAllBytes(path));
byte[] sig = data.Skip(1).Take(32).ToArray();
byte[] zipData = data.Skip(33).ToArray();
if (!SHA256.Create().ComputeHash(zipData).SequenceEqual(sig))
{
throw new Exception("Cannot decrypt because of wrong key.");
}
if (data[0] == 0)
{
FileInfo newFile = new FileInfo(path.Substring(0, path.Length - fileInfo.Extension.Length));
if (newFile.Exists)
{
throw new Exception("Cannot decrypt the file because decryption file already exists.");
}
File.WriteAllBytes(newFile.FullName, zipData);
node.Parent.Nodes.Add(newFile.Name);
}
else
{
DirectoryInfo newDir = new DirectoryInfo(path.Substring(0, path.Length - fileInfo.Extension.Length));
if (newDir.Exists)
{
throw new Exception("Cannot decrypt the file because decryption folder already exists.");
}
using (MemoryStream memStream = new MemoryStream(zipData))
using (ZipArchive archive = new ZipArchive(memStream))
archive.ExtractToDirectory(newDir.FullName);
node.Parent.Nodes.Insert(0, new TreeNode(newDir.Name)
{
BackColor = Color.Yellow
});
}
successList.Add(path);
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
failureList.Add(path);
}
});
doCheckedNodes(this.filesDirectoriesTreeView.Nodes, decryptEvent);
string success = "Success: " + successList.Count.ToString() + " file(s)\n";
foreach (string s in successList)
{
success += s + "\n";
}
string failure = "Failure: " + failureList.Count.ToString() + " file(s)\n";
foreach (string s in failureList)
{
failure += s + "\n";
}
MessageBox.Show("Result:\n\n" + success + "\n" + failure, "Decrypt File(s)", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
private void encryptButton_Click(object sender, EventArgs e)
{
if (MessageBox.Show("Remember:\n" +
"With Folder(s), Encryption Feature MUST compress it before encrypting.\n\n" +
"Do you want to continue?", "Encrypt", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.No)
{
return;
}
Account receiver = (Account)this.accountListBox.SelectedItem;
List <string> successList = new List <string>();
List <string> failureList = new List <string>();
int mode = 0;
mode += (this.compressCheckBox.Checked) ? 1 : 0;
mode += (this.compressOneFileCheckBox.Checked) ? 1 : 0;
EventHandler encryptEvent = null;
switch (mode)
{
case 0:
encryptEvent = new EventHandler(delegate(object o, EventArgs a)
{
TreeNode node = (TreeNode)o;
string path = node.FullPath;
try
{
if (File.Exists(path + ".enc"))
{
throw new Exception("Cannot encrypt because ENC file already exists.");
}
byte[] zipData = null;
if (node.BackColor == Color.Yellow)
{
using (MemoryStream memStream = new MemoryStream())
{
using (ZipArchive archive = new ZipArchive(memStream, ZipArchiveMode.Create))
compressDirectory(path, Path.GetDirectoryName(path).Length + 1, archive);
zipData = memStream.ToArray();
}
}
else
{
zipData = File.ReadAllBytes(path);
}
byte[] data = new byte[zipData.Length + 33];
data[0] = (byte)((node.BackColor == Color.Yellow) ? 1 : 0);
Buffer.BlockCopy(SHA256.Create().ComputeHash(zipData), 0, data, 1, 32);
Buffer.BlockCopy(zipData, 0, data, 33, zipData.Length);
File.WriteAllBytes(path + ".enc", DataEncryption.encrypt(receiver.getPublicKey(), data));
successList.Add(path);
node.Parent.Nodes.Add(node.Text + ".enc");
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
failureList.Add(path);
}
});
doCheckedNodes(this.filesDirectoriesTreeView.Nodes, encryptEvent);
break;
case 1:
encryptEvent = new EventHandler(delegate(object o, EventArgs a)
{
TreeNode node = (TreeNode)o;
string path = node.FullPath;
try
{
if (File.Exists(path + ".enc"))
{
throw new Exception("Cannot encrypt because ENC file already exists.");
}
byte[] zipData = null;
if (node.BackColor == Color.Yellow)
{
using (MemoryStream memStream = new MemoryStream())
{
using (ZipArchive archive = new ZipArchive(memStream, ZipArchiveMode.Create))
compressDirectory(path, Path.GetDirectoryName(path).Length + 1, archive);
zipData = memStream.ToArray();
}
}
else
{
using (MemoryStream memStream = new MemoryStream())
{
using (ZipArchive archive = new ZipArchive(memStream, ZipArchiveMode.Create))
{
ZipArchiveEntry entry = archive.CreateEntry(Path.GetFileName(path));
using (BinaryWriter writer = new BinaryWriter(entry.Open()))
writer.Write(File.ReadAllBytes(path));
}
zipData = memStream.ToArray();
}
}
byte[] data = new byte[zipData.Length + 33];
data[0] = 1;
Buffer.BlockCopy(SHA256.Create().ComputeHash(zipData), 0, data, 1, 32);
Buffer.BlockCopy(zipData, 0, data, 33, zipData.Length);
File.WriteAllBytes(path + ".enc", DataEncryption.encrypt(receiver.getPublicKey(), data));
successList.Add(path);
node.Parent.Nodes.Add(node.Text + ".enc");
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
failureList.Add(path);
}
});
doCheckedNodes(this.filesDirectoriesTreeView.Nodes, encryptEvent);
break;
case 2:
try
{
DirectoryInfo root = new DirectoryInfo(this.pathTextBox.Text);
if (File.Exists(root.FullName + "\\" + root.Name + ".enc"))
{
throw new Exception("Cannot encrypt because ENC file already exists.");
}
byte[] zipData = null;
using (MemoryStream memStream = new MemoryStream())
{
using (ZipArchive archive = new ZipArchive(memStream, ZipArchiveMode.Create))
{
encryptEvent = new EventHandler(delegate(object o, EventArgs a)
{
TreeNode node = (TreeNode)o;
string path = node.FullPath;
if (node.BackColor == Color.Yellow)
{
compressDirectory(path, Path.GetDirectoryName(path).Length + 1, archive);
}
else
{
ZipArchiveEntry entry = archive.CreateEntry(Path.GetFileName(path));
using (BinaryWriter writer = new BinaryWriter(entry.Open()))
writer.Write(File.ReadAllBytes(path));
}
});
doCheckedNodes(this.filesDirectoriesTreeView.Nodes, encryptEvent);
}
zipData = memStream.ToArray();
}
byte[] data = new byte[zipData.Length + 33];
data[0] = 1;
Buffer.BlockCopy(SHA256.Create().ComputeHash(zipData), 0, data, 1, 32);
Buffer.BlockCopy(zipData, 0, data, 33, zipData.Length);
File.WriteAllBytes(root.FullName + "\\" + root.Name + ".enc", DataEncryption.encrypt(receiver.getPublicKey(), data));
this.filesDirectoriesTreeView.Nodes[0].Nodes.Add(root.Name + ".enc");
MessageBox.Show("Encrypt Success", "Encrypt", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
return;
default:
MessageBox.Show("Encrypt Failure", "Encrypt Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
string success = "Success: " + successList.Count.ToString() + " file(s) or folder(s)\n";
foreach (string s in successList)
{
success += s + "\n";
}
string failure = "Failure: " + failureList.Count.ToString() + " file(s) or folder(s)\n";
foreach (string s in failureList)
{
failure += s + "\n";
}
MessageBox.Show("Result:\n\n" + success + "\n" + failure, "Encrypt", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
