public void AESEncryptFile(string filePath, EncryptFileBindingModel encryptBindingModel, DecryptFileBindingModel decryptBindingModel)
{
//Checks from the database if the file choosen is already encrypted. If it is stored in the database
//as an encrypted file it says that it is already encrypted.
if (SaveZoneDbService.GetAllEntitiesWithName(filePath).Count == 0)
{
//Adds to a list the file name of the file choosen.
decryptBindingModel.EncryptedFiles.Add(encryptBindingModel.FileName);
//Generates Key
GenerateKey(encryptBindingModel, decryptBindingModel);
//Generates IV
GenerateIV(encryptBindingModel, decryptBindingModel);
//Sets the source path to the binding model
encryptBindingModel.FileSourcePath = filePath;
//Encrypts the file choosen
EncryptFile(filePath);
//Checks if the user wants to save the password and the IV in a file.
CheckUserInput(encryptBindingModel);
//Resets the IV and password for next use
IV = "";
password = "";
encryptBindingModel.IsEncrypted = true;
//Adds encrypted file to the database
SaveZoneDbService.AddEncryptFileInfo(encryptBindingModel.FileName, encryptBindingModel.FileSourcePath, true);
}
else
{
encryptBindingModel.IsEncrypted = false;
SaveZoneDbService.AddEncryptFileInfo(encryptBindingModel.FileName, encryptBindingModel.FileSourcePath, false);
MessageBox.Show("File already encrypted!", "File Already Encrypted", MessageBoxButtons.OK, MessageBoxIcon.Error, 0,
MessageBoxOptions.DefaultDesktopOnly);
}
}
public void AESEncryptFile(string filePath, EncryptFileBindingModel encryptBindingModel, DecryptFileBindingModel decryptBindingModel)
{
if (SaveZoneDbService.GetAllEntitiesWithName(filePath).Count == 0)
{
decryptBindingModel.EncryptedFiles.Add(encryptBindingModel.FileName);
GenerateKey(encryptBindingModel, decryptBindingModel);
GenerateIV(encryptBindingModel, decryptBindingModel);
encryptBindingModel.FileSourcePath = filePath;
EncryptFile(filePath);
CheckUserInput(encryptBindingModel);
IV = "";
password = "";
encryptBindingModel.IsEncrypted = true;
SaveZoneDbService.AddEncryptFileInfo(encryptBindingModel.FileName, encryptBindingModel.FileSourcePath, true);
}
else
{
encryptBindingModel.IsEncrypted = false;
SaveZoneDbService.AddEncryptFileInfo(encryptBindingModel.FileName, encryptBindingModel.FileSourcePath, false);
MessageBox.Show("File already encrypted!", "File Already Encrypted", MessageBoxButtons.OK, MessageBoxIcon.Error, 0,
MessageBoxOptions.DefaultDesktopOnly);
}
}
private void GenerateIV(EncryptFileBindingModel encryptBindingModel, DecryptFileBindingModel decryptBindingModel)
{
for (int i = 0; i < 16; i++)
{
IV += letters[random.Next(0, 68)];
}
encryptBindingModel.IV = IV;
decryptBindingModel.IV = IV;
}
private void GenerateKey(EncryptFileBindingModel encryptBindingModel, DecryptFileBindingModel decryptBindingModel)
{
for (int i = 0; i < 16; i++)
{
password += letters[random.Next(0, 68)];
}
encryptBindingModel.Pasword = password;
decryptBindingModel.Password = password;
}
private void CheckUserInput(EncryptFileBindingModel encryptFileBindingModel)
{
if (result == DialogResult.OK)
{
fileName = encryptFileDialog.FileName;
encryptFileBindingModel.FileName = Path.GetFileName(fileName);
encryptFileSource = Path.GetFullPath(fileName);
encryptorFile.AESEncryptFile(encryptFileSource, encryptFileBindingModel, decryptFileBindingModel);
CheckIfEncrypted(encryptFileBindingModel);
}
}
private void CheckIfEncrypted(EncryptFileBindingModel encryptFileBindingModel)
{
if (encryptFileBindingModel.IsEncrypted == true)
{
encryptedFile = $"File {encryptFileBindingModel.FileName} was encrypted successfully";
sourcePath = encryptFileSource;
}
else
{
encryptedFile = "";
sourcePath = "";
}
}
private void CheckIfEncrypted(EncryptFileBindingModel encryptFileBindingModel)
{
//if a file is encrypted it is shown to the user. Else it is null.
if (encryptFileBindingModel.IsEncrypted == true)
{
encryptedFile = $"File {encryptFileBindingModel.FileName} was encrypted successfully";
sourcePath = encryptFileSource;
}
else
{
encryptedFile = "";
sourcePath = "";
}
}
private void CheckUserInput(EncryptFileBindingModel encryptFileBindingModel)
{
//Checks if user has pressed OK for saving the source directory
if (result == DialogResult.OK)
{
//Saves the file name
fileName = encryptFileDialog.FileName;
//Sets the file name of the binding model
encryptFileBindingModel.FileName = Path.GetFileName(fileName);
//Sets the source path
encryptFileSource = Path.GetFullPath(fileName);
//Tries to encrypt the file
encryptorFile.AESEncryptFile(encryptFileSource, encryptFileBindingModel, decryptFileBindingModel);
//Checks if the method has encrypted the file
CheckIfEncrypted(encryptFileBindingModel);
}
}
//Checks if user want to save the Password and the IV anywhere.
private void CheckUserInput(EncryptFileBindingModel encryptBindingModel)
{
var msgBox = MessageBox.Show($"File {encryptBindingModel.FileName} encrypted succesfully. \r\nPassword: {password} \r\nIV: {IV} \r\n\r\nDo you want to save the password and the IV in a new text file ?",
"File Encrypted", MessageBoxButtons.YesNo, MessageBoxIcon.Question, 0,
MessageBoxOptions.DefaultDesktopOnly);
//It is used if the user wants to save the password and the IV in a text file
if (msgBox == DialogResult.Yes)
{
string myDocPath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + @"\GNA\EncryptedFiles";
DirectoryInfo di = Directory.CreateDirectory(myDocPath);
using (StreamWriter sw = new StreamWriter(Path.Combine(myDocPath, $"{encryptBindingModel.FileName + "-password"}.txt")))
{
sw.WriteLine($"Password: {password}");
sw.WriteLine($"IV: {IV}");
}
SaveZoneDbService.AddEncryptFileEngine(encryptBindingModel.FileSourcePath, password, IV);
MessageBox.Show($"Password and IV saved with the name {encryptBindingModel.FileName + " - password"}.txt on your startup folder of the program",
"Saved", MessageBoxButtons.OK, MessageBoxIcon.Exclamation, 0,
MessageBoxOptions.DefaultDesktopOnly);
}
//It is used when the user wants to copy the IV and the Password in the clipboard
else
{
SaveZoneDbService.AddEncryptFileEngine(encryptBindingModel.FileSourcePath, password, IV);
var saveMsgBox = MessageBox.Show("Do you want to copy password and the IV in the clipboard?",
"Copy to clipboard", MessageBoxButtons.YesNo, MessageBoxIcon.Question, 0,
MessageBoxOptions.DefaultDesktopOnly);
if (saveMsgBox == DialogResult.Yes)
{
{ Clipboard.SetText($"Password: {password} \r\nIV: {IV}"); }
MessageBox.Show("Password and IV saved to clipboard!", "Saved", MessageBoxButtons.OK, MessageBoxIcon.Exclamation, 0,
MessageBoxOptions.DefaultDesktopOnly);
}
else
{
MessageBox.Show("Password and IV not saved", "Not saved", MessageBoxButtons.OK, MessageBoxIcon.Exclamation, 0,
MessageBoxOptions.DefaultDesktopOnly);
}
}
}
