/// <summary>
/// Establish an authenticated connection to the miniserver. Fires the OnAuthenticated event when successfull.
/// After the event fired, the connection to the miniserver can be used.
/// </summary>
/// <param name="handler">The tokenhandler that should be used</param>
public async override Task Authenticate(TokenHandler handler)
{
if (await MiniserverReachable())
{
WebSocket = new ClientWebSocket();
await WebSocket.ConnectAsync(new Uri($"ws://{IP}:{Port}/ws/rfc6455"), CancellationToken.None);
BeginListening();
string key = await Session.GetSessionKey();
string keyExchangeResponse = (await SendWebservice(new WebserviceRequest <string>($"jdev/sys/keyexchange/{key}", EncryptionType.None))).Value;
TokenHandler = handler;
if (TokenHandler?.Token != null)
{
string hash = await TokenHandler?.GetTokenHash();
string response = (await SendWebservice(new WebserviceRequest <string> ($"authwithtoken/{hash}/{TokenHandler.Username}", EncryptionType.RequestAndResponse))).Value;
AuthResponse authResponse = JsonConvert.DeserializeObject <AuthResponse>(response);
if (authResponse.ValidUntil != default && authResponse.TokenRights != default)
{
OnAuthenticated.BeginInvoke(this, new ConnectionAuthenticatedEventArgs(TokenHandler), null, null);
return;
}
}
if (await TokenHandler.RequestNewToken())
{
OnAuthenticated.BeginInvoke(this, new ConnectionAuthenticatedEventArgs(TokenHandler), null, null);
return;
}
await HttpClient?.Authenticate(new TokenHandler(HttpClient, handler.Username, handler.Token, false));
}
}
/// <summary>
/// Creates a clone of a request and encrypts it
/// </summary>
/// <param name="request">The request that should be encrypted</param>
/// <returns>the encrypted clone of the given request</returns>
private async Task <WebserviceRequest> GetEncryptedRequest(WebserviceRequest request)
{
if (request == null)
{
return(null);
}
WebserviceRequest encRequest = (WebserviceRequest)request.Clone();
if (request.NeedAuthentication && TokenHandler != null) //add authentication if needed
{
if (TokenHandler.Token == null)
{
await TokenHandler.RequestNewToken();
}
encRequest.Queries.Add("autht", await TokenHandler.GetTokenHash());
encRequest.Queries.Add("user", TokenHandler.Username);
encRequest.NeedAuthentication = false;
if (encRequest.Encryption == EncryptionType.None)
{
encRequest.Encryption = EncryptionType.Request;
}
}
switch (encRequest.Encryption)
{
case EncryptionType.Request:
encRequest.Command = "jdev/sys/enc/";
break;
case EncryptionType.RequestAndResponse:
encRequest.Command = "jdev/sys/fenc/";
break;
case EncryptionType.None:
default:
return(encRequest);
}
string query = encRequest.Queries.HasKeys() ? $"?{encRequest.Queries.ToString()}" : "";
encRequest.Command += Uri.EscapeDataString(Cryptography.AesEncrypt($"salt/{Session.Salt}/{request.Command}{query}", Session));
encRequest.Queries.Clear();
encRequest.Queries.Add("sk", await Session.GetSessionKey());
encRequest.Encryption = EncryptionType.None;
return(encRequest);
}
/// <summary>
/// Disposes the WebserviceClient
/// </summary>
public virtual void Dispose()
{
TokenHandler?.Dispose();
}
/// <summary> /// Establish an authenticated connection to the miniserver /// </summary> /// <param name="handler">The tokenhandler that should be used</param> public abstract Task Authenticate(TokenHandler handler);
/// <summary>
/// Provides info required for the authentication on the miniserver
/// </summary>
/// <param name="handler">The tokenHandler that should be used</param>
public override Task Authenticate(TokenHandler handler)
{
TokenHandler = handler;
return(Task.CompletedTask);
}
/// <summary>
/// Initialises the eventArgs
/// </summary>
/// <param name="handler">The tokenHandler used for authentication</param>
public ConnectionAuthenticatedEventArgs(TokenHandler handler)
{
TokenHandler = handler;
}