public void ExecuteSave(object o)
{
// User needs to input all fields
if (String.IsNullOrEmpty(Name) || String.IsNullOrEmpty(Website) || String.IsNullOrEmpty(Username) || String.IsNullOrEmpty(Password))
{
return;
}
byte[] masterKey = CryptoUtil.MasterKey;
byte[] passwordBytes = ASCIIEncoding.ASCII.GetBytes(this.Password);
// Convert the encrypted password to a base64 string for storage
string passwordToStore = Convert.ToBase64String(CryptoUtil.AES_GCMEncrypt(passwordBytes, masterKey));
// TODO: Check if password contains non-base64 chars
PasswordModel newPassword = new PasswordModel()
{
Name = this.Name,
Website = this.Website,
Username = this.Username,
Password = passwordToStore
};
// Places the new PasswordModel into the database with the encrypted password
SQLiteDataAccess.SavePassword(newPassword);
// TODO: Place this password into a secure string
// Sets password for the bindable collection to the decrypted version
newPassword.Password = this.Password;
VaultVM.Passwords.Add(newPassword);
// After saving, goes back to the basic display view of the selected password
VaultVM.PassScreenType = new DisplayPasswordViewModel(SelectedPassword, VaultVM);
}
public void ExecuteCreateUser(object o)
{
string newUserPassword = null;
string newUserConfirmPassword = null;
if (SecurePassword != null & SecureConfirmPassword != null)
{
newUserPassword = SecurePassword.GetString();
newUserConfirmPassword = SecureConfirmPassword.GetString();
}
// Checks to see if input fields are empty or null
if (String.IsNullOrEmpty(Username) || String.IsNullOrEmpty(newUserPassword) || String.IsNullOrEmpty(newUserConfirmPassword))
{
CredentialStatus = "Please input all fields";
return;
}
// Check if user already exists in database
if (SQLiteDataAccess.DoesUserExist(Username))
{
CredentialStatus = "User already exists";
return;
}
// Checks to see if both passwords match before creating a new user
if (newUserPassword == newUserConfirmPassword)
{
byte[] masterKey = CryptoUtil.GenerateByteArray(32);
byte[] salt = CryptoUtil.GenerateByteArray(32);
// Creates the Key Encryption Key derived from the master password using PBKDF2-SHA256
byte[] keyEncryptionKey = CryptoUtil.ComputePBKDF2Hash(newUserPassword, salt);
// Encrypts the master key using the Key Encryption Key and converts it to a base64 string for storage
string encryptedMasterKey = Convert.ToBase64String(CryptoUtil.AES_GCMEncrypt(masterKey, keyEncryptionKey));
Console.WriteLine($"{Username} - Master Key: {Convert.ToBase64String(masterKey)}");
Console.WriteLine($"{Username} - Key Encryption Key: {Convert.ToBase64String(keyEncryptionKey)}");
Console.WriteLine($"{Username} - Encrypted Master Key: {encryptedMasterKey}");
UserModel newUser = new UserModel
{
Username = Username,
Password = encryptedMasterKey,
Salt = Convert.ToBase64String(salt)
};
SQLiteDataAccess.CreateUser(newUser);
var parentConductor = this.Parent as Conductor <Screen>;
parentConductor.ActivateItem(new LoginViewModel());
}
else
{
CredentialStatus = "Passwords do not match";
}
}
private void ExecuteEncrypt(object o)
{
if (!String.IsNullOrEmpty(Password))
{
byte[] passwordBytes = ASCIIEncoding.ASCII.GetBytes(Password);
byte[] masterKey = CryptoUtil.MasterKey;
string encryptedPassword = Convert.ToBase64String(CryptoUtil.AES_GCMEncrypt(passwordBytes, masterKey));
Cipher = encryptedPassword;
}
else
{
Cipher = "";
}
}
public void ExecuteSave(object o)
{
VaultVM.SelectedPasswordModel.Name = this.Name;
VaultVM.SelectedPasswordModel.Website = this.Website;
VaultVM.SelectedPasswordModel.Username = this.Username;
// Encrypts and stores the password in the database
byte[] passwordBytes = ASCIIEncoding.ASCII.GetBytes(this.Password);
byte[] masterKey = CryptoUtil.MasterKey;
byte[] encryptedPassword = CryptoUtil.AES_GCMEncrypt(passwordBytes, masterKey);
VaultVM.SelectedPasswordModel.Password = Convert.ToBase64String(encryptedPassword);
SQLiteDataAccess.UpdatePassword(VaultVM.SelectedPasswordModel);
// Updates password in bindable collection
VaultVM.SelectedPasswordModel.Password = this.Password;
VaultVM.PassScreenType = new DisplayPasswordViewModel(SelectedPassword, VaultVM);
}
