Android Question WebView, Android 4.4.2 and Https

[lagore]

I am using a WebView to access a secure site "https://portal.aerlingus.com" which redirects to a NetScaler login site to log into a company site, on Android 6.0 this works perfectly but on 4.4.2 and below it just comes up with "Web page not available" there is no redirection no errors etc?
Edward

 

[Erel]

Maybe it is using a cipher protocol that is not supported on older versions of Android. Try to download this page with OkHttpUtils2 and see whether it works.

 

[lagore]

Unfortunately I am away from my system until Wednesday but I have had issues using OkHttpUtils2 on older phones as posted on another thread "https://www.b4x.com/android/forum/t...ttputils2-android-versions.79992/#post-506545" I do think it is an SSL issue when I use the browser on a 4.4.2 android phone it has the same problem in not showing the site and reporting "unable to establish a secure connection" . I did run ssllab on the website and it indicated that android 4.4.2 should be ok?
Edward

 

[lagore]

Having some more reading and testing the protocol required by the server site is TLS v1.2 but this protocol is supported but not default on android 16+ <= API <= 21 so when the sslSocket is created it needs to force TLS v1.2 with something like :

private Socket patch(Socket s) {
        if (s instanceof SSLSocket) {
            ((SSLSocket) s).setEnabledProtocols("TLSv1.2");
        }
        return s;
    }

There is a thread which has come up with a java solution, will I have to create my own version of OkHttp using their methods or is there a simpler way of modifying the stock OKHttp to do this?
Edward

 

[Erel]

You will need to create your own version.

 

[tigrot]

I have tested this site on my old 4.2.2 and it gave me login Page with no issue.