Xamarin Forms - Android SSL TLS issue

Question

Xamarin Forms - Android SSL TLS issue

Séb Carré (Glanum) 21

Hello I have an issue right with Android.

So basically it is about SSL TLS issue. Yesterday I couldn't do any request with HttpClient because of the native handler HttpClient says that the TLS support is not available.
I did changes the options of Android Build on my Mac with putting the AndroidHandler HttpClient implementation, it didn't do anything.
So I just call the Android Handler in my code at the init of my HttpClient and I can do requests right now.

The issue I have now is with Image.

All my images from URLS are not working because of HTTPClient implementation which is not working.

How I can fix these issues with the SSL TLS ? or at least can I just change the handler HttpClient inside the Xamarin.Forms.Image ??

For a moment I had this error before build my app ==> System.InvalidOperationException: Unknown TlsProvider ‘Native TLS 1.2+’

Thank you !

Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2022-01-06T05:55:32.587+00:00
You refer to this doc to call the Android Handler and you have set the HttpClient implementation to AndroidClientHandler and set SSL/TLS implementation to Default (Native TLS 1.2+) , right? I'm not clear about your url, you could check if your app make the request to an insecure domain :
Try to add android:usesCleartextTraffic="true" into the <application> of AndroidManifest.xml

<application android:usesCleartextTraffic="true"></application>

Or check the header on server side.
As I known, it may need the certificate authority, refer to
https://stackoverflow.com/questions/66234702/reading-a-certificate-authority-chain-file-in-xamarin-forms
https://learn.microsoft.com/en-us/answers/questions/274703/xamarin-native-ios-android-nsurlsessionhandler-and.html

If you want to change the handler HttpClient inside the Xamarin.Forms.Image , I'm afraid you have to download the image.
In addition, I notice that you are using VS for Mac, you could try to use VS on Windows PC to check if the issue still exist. There is a report under investigation on Developer Community, you could follow the progress.
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2022-01-06T06:00:25.213+00:00

I'm so sorry I can't reproduce this issue. Would you mind sharing the URL to test or sharing a demo to me?
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2022-01-17T09:42:48.473+00:00

Hi @Séb Carré (Glanum) . May I know if you have got any chance to check my reply? Please feel free to share the URL to us and it will be very helpful for us to better work out this issue.

Your answer

Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2022-01-06T05:55:32.587+00:00

You refer to this doc to call the Android Handler and you have set the HttpClient implementation to AndroidClientHandler and set SSL/TLS implementation to Default (Native TLS 1.2+) , right? I'm not clear about your url, you could check if your app make the request to an insecure domain :
Try to add android:usesCleartextTraffic="true" into the <application> of AndroidManifest.xml

<application android:usesCleartextTraffic="true"></application>

Or check the header on server side.
As I known, it may need the certificate authority, refer to
https://stackoverflow.com/questions/66234702/reading-a-certificate-authority-chain-file-in-xamarin-forms
https://learn.microsoft.com/en-us/answers/questions/274703/xamarin-native-ios-android-nsurlsessionhandler-and.html

If you want to change the handler HttpClient inside the Xamarin.Forms.Image , I'm afraid you have to download the image.
In addition, I notice that you are using VS for Mac, you could try to use VS on Windows PC to check if the issue still exist. There is a report under investigation on Developer Community, you could follow the progress.
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2022-01-06T06:00:25.213+00:00

I'm so sorry I can't reproduce this issue. Would you mind sharing the URL to test or sharing a demo to me?
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2022-01-17T09:42:48.473+00:00

Hi @Séb Carré (Glanum) . May I know if you have got any chance to check my reply? Please feel free to share the URL to us and it will be very helpful for us to better work out this issue.

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Xamarin Forms - Android SSL TLS issue

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