/// <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>
/// Sends a webservice to the miniserver and waits until its receives an answer
/// </summary>
/// <param name="request">The Request that should be sent</param>
/// <returns>The Response the miniserver returns</returns>
public async override Task <WebserviceResponse> SendWebservice(WebserviceRequest request)
{
switch (request?.Encryption)
{
case EncryptionType.Request:
request.Command = Uri.EscapeDataString(Cryptography.AesEncrypt($"salt/{Session.Salt}/{request.Command}", Session));
request.Command = $"jdev/sys/enc/{request.Command}";
request.Encryption = EncryptionType.None;
return(await SendWebservice(request));
case EncryptionType.RequestAndResponse:
string command = Uri.EscapeDataString(Cryptography.AesEncrypt($"salt/{Session.Salt}/{request.Command}", Session));
command = $"jdev/sys/fenc/{command}";
WebserviceRequest encryptedRequest = new WebserviceRequest(command, EncryptionType.None);
WebserviceResponse encrypedResponse = await SendWebservice(encryptedRequest);
if (encrypedResponse == null)
{
request.TryValidateResponse(new WebserviceResponse(null, null, (int?)WebSocket?.CloseStatus));
}
else
{
request.TryValidateResponse(new WebserviceResponse(encrypedResponse.Header, Encoding.UTF8.GetBytes(Cryptography.AesDecrypt(encrypedResponse.GetAsStringContent(), Session)), (int?)WebSocket?.CloseStatus));
}
return(request.WaitForResponse());
default:
case EncryptionType.None:
if (WebSocket == null || WebSocket.State != WebSocketState.Open)
{
return(null);
}
lock (Requests) {
Requests.Add(request);
}
byte[] input = Encoding.UTF8.GetBytes(request.Command);
await WebSocket.SendAsync(new ArraySegment <byte>(input, 0, input.Length), WebSocketMessageType.Text, true, CancellationToken.None);
return(request.WaitForResponse());
}
}