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Question
Tuesday, November 19, 2013 6:45 PM
I'm using 'webclient' inorder to downloading info from my website and showing them on my android application, but in some devices I face with this error:
Exception in Class: WebClient Line : 0 and Method:DownloadDataCore with message Error getting response stream (Write: The authentication or decryption has failed.): SendFailure Stack Trace: at System.Net.HttpWebRequest.EndGetResponse (IAsyncResult asyncResult) [0x00000] in :0 at System.Net.HttpWebRequest.GetResponse () [0x00000] in :0 at System.Net.WebClient.GetWebResponse (System.Net.WebRequest request) [0x00000] in :0 at System.Net.WebClient.ReadAll (System.Net.WebRequest request, System.Object userToken) [0x00000] in :0 at System.Net.WebClient.DownloadDataCore (System.Uri address, System.Object userToken) [0x00000] in :0
I searched about this and do not find any suitable answers. Just http://www.mono-project.com/UsingTrustedRootsRespectfully that I do not know how can be usefull for monondroid. Do any body faced with this error too?
All replies (57)
Tuesday, November 19, 2013 9:15 PM
If the server is using secure HTTP, have you tried adding a handler for the callback handler?
ServicePointManager.ServerCertificateValidationCallback += (o, certificate, chain, errors) => true;
Wednesday, November 20, 2013 12:58 PM
Thanks SKall, I do not not use the handler. Can you introduce me a sample in how to use it or a tutorial also can be helpful. Actually I do not know how can I use above line that you posted on muy application.
Thanks
Wednesday, November 20, 2013 1:47 PM
It is a static class so pretty much anywhere in the code as long as its in the scope of the web request.
If you want to be sure just tag it inside Application:OnCreate override. If this fixes the issue then you should also look into the certificate info a little closer if you plan to release the application (I only use this to debug my local server which does not have a valid certification).
[Application(Debuggable = true,
Label = "MyApp",
ManageSpaceActivity = typeof(Activity))]
public class MyApp : Application
{
/// <summary>
/// Initializes a new instance of the <see cref="DeviceApp"/> class.
/// </summary>
/// <param name="javaReference">
/// The java reference.
/// </param>
/// <param name="transfer">
/// The transfer.
/// </param>
public DeviceApp(IntPtr javaReference, JniHandleOwnership transfer)
: base(javaReference, transfer)
{
}
/// <summary>
/// The on create.
/// </summary>
public override void OnCreate ()
{
System.Net.ServicePointManager.ServerCertificateValidationCallback += (o, certificate, chain, errors) => true;
base.OnCreate ();
}
}
Sunday, January 5, 2014 6:34 AM
You might be seeing this error: https://bugzilla.xamarin.com/show_bug.cgi?id=13998
I am seeing it is the alpha channel build 4.11.0 when running in release mode with link SDK assemblies.
The hack workaround was to add System.Security.Cryptography.AesCryptoServiceProvider b = new System.Security.Cryptography.AesCryptoServiceProvider();
so that the linker doesn't optimize it away.
Tuesday, January 14, 2014 2:20 PM
Thanks @GerryHigh this workaround got me through the bug...
Monday, January 27, 2014 7:17 PM
@GerryHigh can you please tell me where and how should I use this: System.Security.Cryptography.AesCryptoServiceProvider b = new System.Security.Cryptography.AesCryptoServiceProvider();
I'm new to xamarin.android, so maybe I didn't catch what you said
Regards
Monday, January 27, 2014 7:55 PM
@alejandrowinkler I threw it in my MainApplication class but you can really put it anywhere so the linker doesn't remove it.
Monday, January 27, 2014 8:21 PM
@GerryHigh, thanks for your reply, it still doesn't work for me. I'm trying to make a registration with Azure using NotificationHub, have you done something like this?
here is the code where the app throw the exception
try
{
var businessHubRegistration = await BusinessNotificationHub.RegisterNativeAsync(registrationId);
}
catch (Exception ex)
{
createNotification("businessHubRegistration", ex.Message);
}
Tuesday, January 28, 2014 11:59 PM
Ok, as nobody answer this I'm going to answer it myself: apparently Xamarin + Windows Azure doesn't work with Android API level 8. I tested the same code with API levels 10 and 18 and it works fine.
Friday, February 21, 2014 5:19 AM
I don't really see what this has to do with the exception being thrown.
I'm getting this exception at the moment as well. Can we please change the question to: has anyone actually gotten WCF authentication to work with Xamarin?
Thursday, March 27, 2014 8:22 PM
Well I added both the code System.Net.ServicePointManager.ServerCertificateValidationCallback += (o, certificate, chain, errors) => true; and System.Security.Cryptography.AesCryptoServiceProvider b = new System.Security.Cryptography.AesCryptoServiceProvider();
but no success.
Here is my code. This code is part of a different project of type class library and its dll is reference into the main project.
public void RequestChannelData(string url) { WebClient channelClient = new WebClient(); channelClient.DownloadStringCompleted += new DownloadStringCompletedEventHandler(channelClient_DownloadStringCompleted); System.Net.ServicePointManager.ServerCertificateValidationCallback += (o, certificate, chain, errors) => true; System.Security.Cryptography.AesCryptoServiceProvider b = new System.Security.Cryptography.AesCryptoServiceProvider(); channelClient.DownloadStringAsync(new System.Uri(url));
} void channelClient_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e) { if (e != null) { if (e.Error == null) { OnDownloadCompanyCompletedAsync (ProcessCompanyXML (e.Result)); } else { OnDownloadError (e.Error); } } }
I am using "https://www.googleapis.com/youtube/v3/channels?part=snippet%2CcontentDetails%2Cstatistics%2CbrandingSettings&id=UC55IWqFLDH1Xp7iu1_xknRA%2CUC6-F5tO8uklgE9Zy8IvbdFw%2CUCpEhnqL0y41EpW2TvWAHD7Q%2CUC-LPIU24bQXVljUXivKEeRQ" as my url. Not sure where and what am I doing wrong. The link will return error in JSON data but that should not be the reason for exception since the URL did returned data.
And here is the exception I am getting
e.Error {System.Net.WebException: Error getting response stream (Write: The authentication or decryption has failed.): SendFailure > System.IO.IOException: The authentication or decryption has failed. > Mono.Security.Protocol.Tls.TlsException: The server stopped the handshake. at Mono.Security.Protocol.Tls.SslClientStream.SafeReceiveRecord (System.IO.Stream s, Boolean ignoreEmpty) [0x00000] in <filename unknown>:0 at Mono.Security.Protocol.Tls.SslClientStream.OnNegotiateHandshakeCallback (IAsyncResult asyncResult) [0x00000] in <filename unknown>:0 at Mono.Security.Protocol.Tls.SslStreamBase.AsyncHandshakeCallback (IAsyncResult asyncResult) [0x00000] in <filename unknown>:0 End of inner exception stack trace at Mono.Security.Protocol.Tls.SslStreamBase.AsyncHandshakeCallback (IAsyncResult asyncResult) [0x00000] in <filename unknown>:0 End of inner exception stack trace at System.Net.HttpWebRequest.EndGetResponse (IAsyncResult asyncResult) [0x00000] in <filename unknown>:0 at System.Net.HttpWebRequest.GetResponse () [0x00000] in <filename unknown>:0 at System.Net.WebClient.GetWebResponse (System.Net.WebRequest request) [0x00000] in <filename unknown>:0 at System.Net.WebClient.ReadAll (System.Net.WebRequest request, System.Object userToken) [0x00000] in <filename unknown>:0 at System.Net.WebClient.DownloadDataCore (System.Uri address, System.Object userToken) [0x00000] in <filename unknown>:0 } System.Net.WebException
Tuesday, June 3, 2014 2:24 PM
I am getting the same issue. Please reply the solution if you guys have fixed this. Will really appreciate any effort.
Sunday, October 12, 2014 3:07 PM
Sorry I know this post is old but it just helped me fix my problem.
For the ones who still don't have it working, maybe do this: change the first line to:
ServicePointManager.ServerCertificateValidationCallback += CertificateValidationCallBack;
And copy the method from this page: http://msdn.microsoft.com/en-us/library/office/dd633677(v=exchg.80).aspx
Maybe you'll find more info :)
Tuesday, November 25, 2014 10:44 AM
Hi Sn3b. I've had the same issue. I am new to Xamarin and Android, but I think the principle issue may be that the X509 Certificate needs to be approved/authenticated by a Google Play authorised body (whatever the correct wording is) for it to be accepted without complaint by Android.
My temporary work-around was to accept the particular error thrown, but this compromises security. In my case this didn't matter too much as the App has no financial security function and was for a control system customer demo only.
Monday, February 9, 2015 5:54 PM
FYI - I got this same error when initializing http client like this:
HttpClient client = new HttpClient();
but when I init like this, it works just fine:
HttpClient client = new HttpClient(new NativeMessageHandler());
Wednesday, February 18, 2015 3:04 PM
Sample code : still not working
ServicePointManager.ServerCertificateValidationCallback += (o, certificate, chain, errors) => true; System.Security.Cryptography.AesCryptoServiceProvider b = new System.Security.Cryptography.AesCryptoServiceProvider(); WebRequest request = WebRequest.Create("https://some.server.com/"); HttpWebResponse response = (HttpWebResponse) request.GetResponse();
System.Net.WebException: Error: SendFailure (Error writing headers) > System.Exception: Error writing headers > System.Exception: The authentication or decryption has failed. > System.Exception: The authentication or decryption has failed. at Mono.Security.Protocol.Tls.RecordProtocol.ProcessAlert (AlertLevel alertLevel, AlertDescription alertDesc) [0x00000] in <filename unknown>:0 at Mono.Security.Protocol.Tls.RecordProtocol.InternalReceiveRecordCallback (IAsyncResult asyncResult) [0x00000] in <filename unknown>:0 End of inner exception stack trace
Need help please, i've tried every possible answer the internet has to offer.
Wednesday, April 15, 2015 12:52 PM
Hi,
I am getting same error in mine monodroid application for following code,
try { System.Net.ServicePointManager.ServerCertificateValidationCallback = (a, b, c, d) => { return true; }; System.Net.WebRequest request = System.Net.HttpWebRequest.Create("https://realtime.built.io/"); System.Net.HttpWebResponse response = (System.Net.HttpWebResponse) request.GetResponse(); System.IO.Stream stream = response.GetResponseStream(); System.IO.StreamReader sr = new System.IO.StreamReader(stream); strResponse = sr.ReadToEnd(); sr.Close(); sr.Dispose(); stream.Dispose(); } catch (System.IO.IOException ex) { throw ex; } catch (System.UriFormatException ex) { throw ex; }
But, if I run same code to get "https://google.com" it is working fine. Anyone clue for this?
Wednesday, June 3, 2015 9:21 AM
This isn't an answer, but know that if you are going to use ServicePointManager.ServerCertificateValidationCallback += (o, certificate, chain, errors) => true; your https connection will be just as insecure as a http connection.
Wednesday, June 3, 2015 11:12 AM
For me the source of the problem was that the server certificate was not accepted by Android. I tried to fix it by installing the certificate but that did not work. Only after I installed the root certificate the problem was solved.
So if your Root CA list on your Android device is not up to date go to you security settings and install the root certificate from your SD card.
Note that Firefox uses it's own certificate store. So if you test a secure connection in Firefox you might get different results than testing it in the Android browser.
Thursday, July 30, 2015 9:05 AM
If I can access my Rest service through my mobile browser, than I should be able to consume my SSL based Rest service through my android phone. I am also getting the same error. Is this a bug in xamarin.forms? Help needed!
InnerException {System.Net.WebException: Error writing headers > System.IO.IOException: Error while sending TLS Alert (Fatal:InternalError): System.IO.IOException: The authentication or decryption has failed. > System.IO.IOException: EndRead failure > System.Net.Sockets.SocketException: Connection reset by peer at System.Net.Sockets.Socket.EndReceive (IAsyncResult result) [0x00033] in <filename unknown>:0 at System.Net.Sockets.NetworkStream.EndRead (IAsyncResult ar) [0x0002f] in <filename unknown>:0 End of inner exception stack trace at System.Net.Sockets.NetworkStream.EndRead (IAsyncResult ar) [0x00048] in <filename unknown>:0 at Mono.Security.Protocol.Tls.RecordProtocol.InternalReceiveRecordCallback (IAsyncResult asyncResult) [0x00019] in <filename unknown>:0 End of inner exception stack trace at Mono.Security.Protocol.Tls.SslClientStream.EndNegotiateHandshake (IAsyncResult result) [0x0003b] in <filename unknown>:0 at Mono.Security.Protocol.Tls.SslStreamBase.AsyncHandshakeCallback (IAsyncResult asyncResult) [0x0000c] in <filename unknown>:0 > System.IO.IOException: The authentication or decryption has failed. > System.IO.IOException: EndRead failure > System.Net.Sockets.SocketException: Connection reset by peer at System.Net.Sockets.Socket.EndReceive (IAsyncResult result) [0x00033] in <filename unknown>:0 at System.Net.Sockets.NetworkStream.EndRead (IAsyncResult ar) [0x0002f] in <filename unknown>:0 End of inner exception stack trace at System.Net.Sockets.NetworkStream.EndRead (IAsyncResult ar) [0x00048] in <filename unknown>:0 at Mono.Security.Protocol.Tls.RecordProtocol.InternalReceiveRecordCallback (IAsyncResult asyncResult) [0x00019] in <filename unknown>:0 End of inner exception stack trace at Mono.Security.Protocol.Tls.SslClientStream.EndNegotiateHandshake (IAsyncResult result) [0x0003b] in <filename unknown>:0 at Mono.Security.Protocol.Tls.SslStreamBase.AsyncHandshakeCallback (IAsyncResult asyncResult) [0x0000c] in <filename unknown>:0 End of inner exception stack trace at System.Net.WebConnection.EndWrite (System.Net.HttpWebRequest request, Boolean throwOnError, IAsyncResult result) [0x000a7] in <filename unknown>:0 at System.Net.WebConnectionStream+<SetHeadersAsync>c__AnonStorey1.<>m__0 (IAsyncResult r) [0x00000] in <filename unknown>:0 End of inner exception stack trace } System.Net.WebException
Thursday, July 30, 2015 9:06 AM
that's my code for the rest service call,
try {
if (!await IsConnected ())
throw new Exception ("");
var client = new HttpClient ();
var CancellationTokenSrc = new CancellationTokenSource (15000);
var token = CancellationTokenSrc.Token;
var serializedContent = JsonConvert.SerializeObject (Wrapper);
HttpContent httpContent = new StringContent (serializedContent, Encoding.UTF8, "application/json");
//IignoreCertificateError CertError = DependencyService.Get<IignoreCertificateError>();
//CertError.IgnoreCertError();
var response = await client.PostAsync(url, httpContent, token);
var responseString = await response.Content.ReadAsStringAsync ();
return await Task<DeviceResult>.Factory.StartNew (() => JsonConvert.DeserializeObject<DeviceResult> (responseString));
}
catch (Exception ex) {
throw new Exception ("Server konnte nicht erreicht werden. Bitte überprüfen Sie Ihre Einstellungen.");
}
Friday, August 21, 2015 9:36 AM
Hello All,
Thanks for the help. I have solved my problem on my own. I wasn't generating the key properly for the encipherment and was using the wrong provider.
Regards, Taimoor Janjua
Friday, November 20, 2015 4:15 PM
The solution provided by snb3 worked for me. Basically the web server was using a self-signed certificate and my application was not handling it properly. The code pointed by snb3 made it possible to accept the self-signed certificate.
Monday, November 23, 2015 1:17 PM
In my case I was seeing this issue when hitting a legit site. I found that that executing this on my box worked for me, via http://stackoverflow.com/a/11451213/29: mozroots --import --ask-remove
This adds the root certs that most sites are chained to, which preserves security more than just accepting whatever cert you get.
Sunday, December 13, 2015 10:41 PM
I just starting getting this error all of a sudden...anyone else?
Wednesday, January 6, 2016 5:37 PM
Yep, same here. Stable channel, no updates recently.
Wednesday, January 13, 2016 10:15 AM
This is quite an old post, but for people still getting this, know that the answer of EdHubbel is correct.
If you encounter this issue using the HttpClient class like this HttpClient client = new HttpClient();
then install the "modernhttpclient" nuget package to your project (both PCL, and native projects), and then change your HttpClient class initialization to this:
HttpClient client = new HttpClient(new NativeMessageHandler());
The NativeMessageHandler class will handle for you these certificates issues
Thursday, February 18, 2016 11:07 AM
@pierreshiraziefard have solved the problem
Saturday, April 2, 2016 2:26 PM
Hi I am facing same kind of issues while integrating payment gateway & passing post params to webview. Xamarin.droid always throw me error Failed to Decrypt the application request. I tried each & every solution in this thread but nothing worked. I tried the same way in native android I am able to see the successs in transaction till last step.
can anyone guide me on right path for this?Thanks in advance
Thursday, April 21, 2016 6:38 PM
hi @ThomasHuijzer.0458
I tried to make a HttpWebRequest with the following code, but does not work. Apparently when it used ServicePointManager.ServerCertificateValidationCallback + = delegate {return true; }; works but I think it is not the way to implement it. and that any certificate I can put although not the same as the server and still works. I want to know if you know what my mistake or I need to implement the request as mobile certificate and the server is the same. thanks
the certificate that i use is signed by CA
X509Certificate2 cert; using (var s = Assets.Open("certificate.pfx")) { byte[] d = new byte[20480]; s.Read(d, 0, d.Length); cert = new X509Certificate2(d, "test"); } var request = WebRequest.Create(httpUrl) as HttpWebRequest; request.ClientCertificates.Add(cert); request.Method = "GET"; request.ContentType = "application/json";
try
{
using (var response = request.GetResponse())
{
using (var reader = new StreamReader(response.GetResponseStream()))
{
string content = reader.ReadToEnd();
}
}
}
catch(Exception ex)
{
string error = ex.ToString();
throw ex;
}
Errror:
System.Net.WebException: Error writing headers > System.IO.IOException: The authentication or decryption has failed. > Mono.Security.Protocol.Tls.TlsException: The authentication or decryption has failed. at Mono.Security.Protocol.Tls.RecordProtocol.EndReceiveRecord (IAsyncResult asyncResult) [0x0003a] in /Users/builder/data/lanes/3053/a94a03b5/source/mono/mcs/class/Mono.Security/Mono.Security.Protocol.Tls/RecordProtocol.cs:430 at Mono.Security.Protocol.Tls.SslClientStream.SafeEndReceiveRecord (IAsyncResult ar, Boolean ignoreEmpty) [0x00000] in /Users/builder/data/lanes/3053/a94a03b5/source/mono/mcs/class/Mono.Security/Mono.Security.Protocol.Tls/SslClientStream.cs:285 at Mono.Security.Protocol.Tls.SslClientStream.NegotiateAsyncWorker (IAsyncResult result) [0x00071] in /Users/builder/data/lanes/3053/a94a03b5/source/mono/mcs/class/Mono.Security/Mono.Security.Protocol.Tls/SslClientStream.cs:447
Thursday, May 12, 2016 2:52 PM
Hello, did anyone find a solution? I get the same exact error.
Thank you
Monday, June 6, 2016 4:15 PM
Also getting this issue using Microsoft.IdentityModel.Clients.ActiveDirectory
Tuesday, August 2, 2016 6:00 PM
@AdrienPadol said: This is quite an old post, but for people still getting this, know that the answer of EdHubbel is correct.
If you encounter this issue using the HttpClient class like this HttpClient client = new HttpClient();
then install the "modernhttpclient" nuget package to your project (both PCL, and native projects), and then change your HttpClient class initialization to this:
HttpClient client = new HttpClient(new NativeMessageHandler());
The NativeMessageHandler class will handle for you these certificates issues
That solved the problem for me - thank you!
Tuesday, August 23, 2016 1:29 AM
@AlexanderGolde Solved the problem for me also - thank you !
Saturday, October 22, 2016 8:01 AM
@AdrienPadol Thank you so much your a life saver your solution worked like a charm
Thursday, November 3, 2016 6:24 PM
@EdHubbell said: FYI - I got this same error when initializing http client like this:
HttpClient client = new HttpClient();but when I init like this, it works just fine:
HttpClient client = new HttpClient(new NativeMessageHandler());
var httpClient = new HttpClient(new NativeMessageHandler()) Worked for me for a while, but now it's giving me this error:
java.security.cert.CertPathValidatorException: Trust anchor for certification path not found
Wednesday, November 23, 2016 2:10 PM
Having just spent four hours trawling for a solution to this problem, I finally noticed (and I feel like an idiot, but for the benefit of anyone making such a simple mistake)... I was using UriBuilder and passing port 80 for https scheme. It should of course be 443 for Secure HTTP.
Friday, January 13, 2017 3:48 AM
@DylanLiu I using modernhttpclient in my application and i am also facing the same error "Trust anchor for certification path not found" how did you mange to fix this I am stuck with it for days.
Thursday, January 19, 2017 1:57 AM
@ranjitr said: @DylanLiu I using modernhttpclient in my application and i am also facing the same error "Trust anchor for certification path not found" how did you mange to fix this I am stuck with it for days.
Read this article.
By the way,at first i have installed ModernHttpClient and problem was resolved.
Than i have tried this snippet(from article) :
HttpClient Request = new HttpClient(new Xamarin.Android.Net.AndroidClientHandler())
Plus i have changed in options "HttpClient implementation" to => Managed(HttpClientHandler) , works great.
Try it 😄 .
Thursday, January 26, 2017 9:37 PM
@AdrienPadol said: This is quite an old post, but for people still getting this, know that the answer of EdHubbel is correct.
If you encounter this issue using the HttpClient class like this HttpClient client = new HttpClient();
then install the "modernhttpclient" nuget package to your project (both PCL, and native projects), and then change your HttpClient class initialization to this:
HttpClient client = new HttpClient(new NativeMessageHandler());
The NativeMessageHandler class will handle for you these certificates issues
"the authentication or decryption has failed." error is solved thanks
Friday, January 27, 2017 8:55 PM
I got a "System.Net.WebException: Error: SecureChannelFailure (The authentication or decryption has failed.)" error which led me to this thread...
@AdrienPadol 's answer fixed my issue, but I'm still baffled. Does anyone know why this error would begin showing up at all?
Once the error started showing up, I rolled my code back to the last build where I know for sure I didn't have the issue, and still was seeing it over and over. What causes this?
Thursday, March 23, 2017 11:03 AM
"modernhttpclient" nuget package works for me.
Thanks @AdrienPadol ....... :)
Thursday, March 23, 2017 3:56 PM
Can anyone confirm if this modernhttpclient solution will work on Xamarin projects that target both Android and iOS?
Friday, March 24, 2017 6:03 AM
Hi @SamuelPike ,
Yes, that will works fine on both Android & IOS.
Tuesday, April 4, 2017 8:35 PM
I've solved System.Net.WebException: Error: SecureChannelFailure (The authentication or decryption has failed.) on Android (Xamarin.Forms) by setting
Project Properties > Build Options > Advanced HttpClient implementation -> AndroidClientHandler SSL/TLS implementation -> Native TLS 1.2+
Xamarin 4.3.0.795 Xamarin.Android 7.1.0.43 Endpoint i'm accessing is SSL3, TLS1.1 and TSL1.2 enabled.
Tuesday, April 18, 2017 6:53 PM
I was about to report that SvetlomirKalitsov's solution did not work for me. Then I carefully re-checked the settings and made sure they were exactly as he describes. Now it works. Details below.
My build environment: * W10 creators edition release version * Nexus 6P Android 7.1.2 (Release I think) * Xamarin 4.4.0.34 * Xamarin.Android 7.2.0.7 * Visual Studio 2017.1
Client:
* RestSharp.Portable
As @SvetlomirKalitsov describes, the two settings below take care of the issue:
HttpClient implementation -> AndroidClientHandler SSL/TLS implementation -> Native TLS 1.2+ * Here is where I made the mistake: There are two pretty similar options: Native TLS 1.2+ which is the correct one, and Default (Native TLS 1.2+). This second one (Default) will fail. Make sure to select the non-default one; in other words, make sure to force that option instead of relying on the Default.
A bit of background info: XAHTTPCLIENTHANDLERTYPE environment variable on Xamarin.Android
Thanks @SvetlomirKalitsov
Monday, May 22, 2017 6:17 AM
@SvetlomirKalitsov Great, It solve my problem.
This is the correct.
Tuesday, May 23, 2017 1:35 PM
@SvetlomirKalitsov thanks this worked also for me!
Tuesday, May 23, 2017 5:23 PM
Nevermind. I found it in Xamarin Studio Mac. It's Project Options > Android Build > General Tab at the bottom
Wednesday, May 24, 2017 4:58 PM
Thank you SvetlomirKalitsov and AndresS. Mine did not work either until I went to select the TLS 1.2 (even though default gives you the impression it is selected.
Now, after rebuild I was able to use without modernhttpclient and it doesn't throw the authentication error, because my IOS worked perfectly with the server without doing of this, I didn't feel comfortable with using a package just to get around the problem for Android. Many people said just add this package but no one explained why it should be used?
@AndresS said: I was about to report that SvetlomirKalitsov's solution did not work for me. Then I carefully re-checked the settings and made sure they were exactly as he describes. Now it works. Details below.
My build environment: * W10 creators edition release version * Nexus 6P Android 7.1.2 (Release I think) * Xamarin 4.4.0.34 * Xamarin.Android 7.2.0.7 * Visual Studio 2017.1
Client:
* RestSharp.PortableAs @SvetlomirKalitsov describes, the two settings below take care of the issue:
HttpClient implementation -> AndroidClientHandler SSL/TLS implementation -> Native TLS 1.2+ * Here is where I made the mistake: There are two pretty similar options: Native TLS 1.2+ which is the correct one, and Default (Native TLS 1.2+). This second one (Default) will fail. Make sure to select the non-default one; in other words, make sure to force that option instead of relying on the Default.
A bit of background info: XAHTTPCLIENTHANDLERTYPE environment variable on Xamarin.Android
Thanks @SvetlomirKalitsov
Friday, May 26, 2017 2:41 AM
:) Hi everyone! It worked for me changing advanced android options in visual studio to: HttpClient implementation: Android SSL/TLS implementation: Managed TLS 1.1 Thank you. PS: I also need solution of @Sn3b :)
Monday, June 5, 2017 10:29 PM
@AdrienPadol said: This is quite an old post, but for people still getting this, know that the answer of EdHubbel is correct.
If you encounter this issue using the HttpClient class like this HttpClient client = new HttpClient();
then install the "modernhttpclient" nuget package to your project (both PCL, and native projects), and then change your HttpClient class initialization to this:
HttpClient client = new HttpClient(new NativeMessageHandler());
The NativeMessageHandler class will handle for you these certificates issues
But I dont understand I am not using https url I only do http get and i am seeing this message, how can this be?
Wednesday, August 30, 2017 5:23 PM
If you change the Android build property of HttpClientImplementation to AndroidClientHandler will solve the issue
Monday, September 18, 2017 10:34 AM
@BalakrishnanS said: If you change the Android build property of HttpClientImplementation to AndroidClientHandler will solve the issue
Thanks, it works
Friday, October 20, 2017 9:24 PM
@AdrienPadol said: This is quite an old post, but for people still getting this, know that the answer of EdHubbel is correct.
If you encounter this issue using the HttpClient class like this HttpClient client = new HttpClient();
then install the "modernhttpclient" nuget package to your project (both PCL, and native projects), and then change your HttpClient class initialization to this:
HttpClient client = new HttpClient(new NativeMessageHandler());
The NativeMessageHandler class will handle for you these certificates issues
This solve the problem! Thank you man! I was trying it for a month! Thank you!
Monday, December 11, 2017 11:32 AM
I got the same issue and resolve that using SvetlomirKalitsov solution.
Wednesday, February 7, 2018 11:56 AM
@AdrienPadol said: This is quite an old post, but for people still getting this, know that the answer of EdHubbel is correct.
If you encounter this issue using the HttpClient class like this HttpClient client = new HttpClient();
then install the "modernhttpclient" nuget package to your project (both PCL, and native projects), and then change your HttpClient class initialization to this:
HttpClient client = new HttpClient(new NativeMessageHandler());
The NativeMessageHandler class will handle for you these certificates issues
This works for me too, thanks!