Question by ZachAttack9280 · Apr 07, 2018 at 10:21 PM · c#error exception downloading webclient

TlsException error only on windows 10 (not mac)

Hello, I have made a script where I can download the price of bitcoin from an api source. This script only works on one of my windows 10 desktops and my macbook air. For some strange reason i get this really long and strange error on my second desktop during the download process (i think). Here is the error:

 TlsException: Invalid certificate received from server. Error code: 0xffffffff80092012
 Mono.Security.Protocol.Tls.Handshake.Client.TlsServerCertificate.validateCertificates (Mono.Security.X509.X509CertificateCollection certificates)
 Mono.Security.Protocol.Tls.Handshake.Client.TlsServerCertificate.ProcessAsTls1 ()
 Mono.Security.Protocol.Tls.Handshake.HandshakeMessage.Process ()
 (wrapper remoting-invoke-with-check) Mono.Security.Protocol.Tls.Handshake.HandshakeMessage:Process ()
 Mono.Security.Protocol.Tls.ClientRecordProtocol.ProcessHandshakeMessage (Mono.Security.Protocol.Tls.TlsStream handMsg)
 Mono.Security.Protocol.Tls.RecordProtocol.InternalReceiveRecordCallback (IAsyncResult asyncResult)
 Rethrow as IOException: The authentication or decryption has failed.
 Mono.Security.Protocol.Tls.SslStreamBase.AsyncHandshakeCallback (IAsyncResult asyncResult)
 Rethrow as WebException: Error getting response stream (Write: The authentication or decryption has failed.): SendFailure
 System.Net.HttpWebRequest.EndGetResponse (IAsyncResult asyncResult)
 System.Net.HttpWebRequest.GetResponse ()
 System.Net.WebClient.GetWebResponse (System.Net.WebRequest request)
 System.Net.WebClient.DownloadDataCore (System.Uri address, System.Object userToken)

Here is the script

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 using System.Linq;
 using System.Text;
 using System.Net;
 using System;
 
 public class EthereumPrice : MonoBehaviour {
 
     public Text ethPriceText;
     public Text updateText;
     public float updateTime = 30;
     public float time = 0;
     public float ethPriceR;
 
     public GameObject priceUpdatePopUp;
 
     public void Start() {
         StartCoroutine(Example());
         priceUpdatePopUp.SetActive(false);
 
     }
 
     public void Update() {
 
         time += Time.deltaTime;
         updateTime -= Time.deltaTime;
 
         updateText.text = "Price Update in " + updateTime.ToString("F0") + " seconds. (Lags)";
 
         priceUpdatePopUp.SetActive(false);
 
         if (time >= 30) {
             StartCoroutine(Example());
             time = 0;
         }
 
         if (updateTime <= 0)
         {
             updateTime = 30;
         }
 
     }
 
     IEnumerator Example()
     {
         yield return new WaitForSecondsRealtime(1f);
         using (WebClient webClient = new System.Net.WebClient())
         {
             priceUpdatePopUp.SetActive(true);
             WebClient n = new WebClient();
             var json = n.DownloadString("https://min-api.cryptocompare.com/data/price?fsym=ETH&tsyms=USD");
             string valueOriginal = Convert.ToString(json);
             json = json.Replace("{\"USD\":", string.Empty);
             json = json.Replace("}", string.Empty);
             var sStrings = json.Split();
             float ethPrice = float.Parse(sStrings[0]);
             ethPriceR = ethPrice;
             ethPriceText.text = "Ethereum ($" + ethPrice + ")";
             time += Time.deltaTime;
             Debug.Log(json);
 
         }
     }
 }

Any suggestions? Fast replies would be nice but not necessary.

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