/// <summary>
/// Logs in a user with the given user name and password, using the given key to decrypt the password
/// </summary>
/// <param name="userName">The name of the user logging on</param>
/// <param name="password">The password of the user logging on</param>
/// <param name="passwordKey">The key to decrypt to the password</param>
/// <returns>The logged-on user</returns>
public User Login(string userName, string password, string passwordKey)
{
// check that a user with the given user name exists
List <User> allUsers = DataManager.GetDataContext <User>().GetAll <User>();
User user = allUsers.FirstOrDefault(u => u.UserName == userName);
if (user == null)
{
throw new Exception(USER_NOT_FOUND);
}
// decrypt the server password
string storedPassword = EncryptionUtility.Decrypt(ServerPasswordKey, user.Password);
// decrypt the given password
string givenPassword = EncryptionUtility.Decrypt(passwordKey, password);
// check that the passwords match
if (storedPassword != givenPassword)
{
throw new Exception(INVALID_PASSWORD);
}
// add to logged on users
if (!LoggedOnUsers.Any(u => u.Email == user.Email))
{
LoggedOnUsers.Add(user);
}
return(user);
}
/// <summary>
/// Registers a new user using the given password key to decrypt their password
/// </summary>
/// <param name="newUser"></param>
/// <param name="passwordKey"></param>
public void Register(User newUser, string passwordKey, string facebookAuthCode)
{
// check if user already exists
List <User> allUsers = DataManager.GetDataContext <User>().GetAll <User>();
if (allUsers.Any(u => u.UserName == newUser.UserName))
{
throw new Exception(USER_EXISTS);
}
if (newUser.SyncWithFacebook)
{
newUser.FacebookAccessToken = FacebookManager.GetFacebookAccessToken(facebookAuthCode);
}
// decrypt password
string decrypted = EncryptionUtility.Decrypt(passwordKey, newUser.Password);
// re-encrypt password with server key
string serverEncrypt = EncryptionUtility.Encrypt(ServerPasswordKey, decrypted);
// set the user's password to the server-encrypted version
newUser.Password = serverEncrypt;
// add the users to the data context and save
DataManager.GetDataContext <User>().AddObjects <User>(new User[] { newUser }.ToList());
DataManager.GetDataContext <User>().Save();
// add the user the logged on users
if (!LoggedOnUsers.Any(u => u.Email == newUser.Email))
{
LoggedOnUsers.Add(newUser);
}
}