public async Task<User> AuthenticateAsync(string userName, string password, bool useSecureLogin = false)
{
User user = null;
if (!string.IsNullOrEmpty(userName) && !string.IsNullOrEmpty(password))
{
var client = this.GetHttpClient(useSecureLogin);
try
{
TokenResponse = await client.RequestResourceOwnerPasswordAsync(userName, password);
if (TokenResponse != null)
{
if (TokenResponse.IsError)
{
throw new UnauthorizedAccessException(this.m_strUnauthorizedAccessExceptionMessage);
}
Windows.Storage.ApplicationData.Current.RoamingSettings.Values["username"] = userName;
Windows.Storage.ApplicationData.Current.RoamingSettings.Values["usesecurelogin"] = useSecureLogin;
Windows.Security.Credentials.PasswordVault vault = new Windows.Security.Credentials.PasswordVault();
PasswordCredential passwordCredential = new PasswordCredential(PasswordVaultResourceName, userName, password);
vault.Add(passwordCredential);
if (passwordCredential != null)
{
user = new User
{
UserName = userName,
UseSecureLogin = useSecureLogin
};
m_settingsService.User = user;
}
}
}
catch (UnauthorizedAccessException)
{
throw new UnauthorizedAccessException(this.m_strUnauthorizedAccessExceptionMessage);
}
catch (Exception exception)
{
NullReferenceException nullReferenceException = exception as NullReferenceException;
if (nullReferenceException != null)
{
//there could be a nullreference exception at account change when the login is encrypted.
throw new UnauthorizedAccessException(this.m_strEncryptedLoginException);
}
throw exception;
}
}
else
{
throw new UnauthorizedAccessException(this.m_strUnauthorizedAccessExceptionMessage);
}
return user;
}
public async Task<User> VerifyUserCredentialsAsync()
{
User user = m_settingsService.User;
PasswordVault vault = new PasswordVault();
try
{
await Task.Run(() =>
{
var userName = m_settingsService.User?.UserName;
if (!string.IsNullOrEmpty(userName))
{
var passwordCredential = vault.Retrieve(PasswordVaultResourceName, userName);
if (passwordCredential != null)
{
user = new User
{
UserName = userName,
Password = vault.Retrieve(PasswordVaultResourceName, passwordCredential.UserName).Password,
UseSecureLogin = Windows.Storage.ApplicationData.Current.RoamingSettings.Values["usesecurelogin"] != null ? (bool)Windows.Storage.ApplicationData.Current.RoamingSettings.Values["usesecurelogin"] : false
};
}
}
});
}
catch { }
return user;
}