public async void LoginHandler()
{
try
{
_user.UserName = _user.UserName.Trim();
string hashedPassword = new SHA512Crypto().GetHashBase64String(_user.Password);
LoggedUserModel loggedUser = new LoggedUserModel();
await Task.Run(() =>
{
using (CoreContext context = new CoreContext())
{
User user = context.Users.FirstOrDefault(x => x.UserName.Equals(_user.UserName, StringComparison.InvariantCultureIgnoreCase) && x.PasswordHash.Equals(hashedPassword));
if (user != null)
{
loggedUser.ID = user.ID;
loggedUser.UserName = user.UserName;
loggedUser.FullName = user.FullName;
loggedUser.Email = user.Email;
loggedUser.IsAuthenticated = true;
}
else
{
loggedUser.IsAuthenticated = true;
}
}
});
GoToMainViewRequested?.Invoke(this, loggedUser);
}
catch (Exception ex)
{
LogHelper.LogException(new string[] { ex.ToString() });
}
}
/// <summary>
/// Creates secure password based on the predefined input.
/// Size of bytes determines the size of returned password.
/// Iteration determines how many iterations to take to produce final result.
/// </summary>
/// <param name="input">Input as string. It's called predefined input.</param>
/// <param name="size">Size of returned password in bytes.</param>
/// <param name="iteration">Iteration count.</param>
/// <returns>Random password in bytes.</returns>
/// <exception cref="ArgumentNullException">'input' cannot be null/empty.</exception>
/// <exception cref="ArgumentNullException">'size' cannot be less than 8 bytes.</exception>
/// <exception cref="ArgumentOutOfRangeException">'iteration' is invalid.</exception>
public static byte[] CreateSecurePassword(string input, int size = 16, int iteration = 10000)
{
if (String.IsNullOrEmpty(input))
{
throw new ArgumentNullException(nameof(input));
}
if (size < 8)
{
throw new ArgumentNullException(nameof(size), "'size' cannot be less than 8.");
}
if (iteration < 5000)
{
throw new ArgumentOutOfRangeException(nameof(iteration), "Min value for iteration is 5000.");
}
byte[] data = null;
try
{
byte[] salt = new SHA512Crypto().GetHashBytes(input);
using (Rfc2898DeriveBytes generator = new Rfc2898DeriveBytes(input, salt, iteration))
{
data = generator.GetBytes(size);
}
}
catch { data = null; }
return(data);
}
