Xamarin way to open self signed certificate webpage in UIWebView - ios

Question

As the question title described, I want to open a self signed webpage within an UIWebview (Xamarin.iOS)
By default, self signed webpages do not load in an UIWebView.
Important requirements for the solution:
It should be accepted by Apple when I want to submit the app to the Apple app store (so a custom NSUrlRequest does not fit).
It should load css and javascript properly.
I found a possible solution on stackoverflow but this is for native iOS.
https://stackoverflow.com/a/11664147
I was also wondering if the solution described above requires to login using a NSUrlConnectionDelegate.
The desired solution should be that the user can fill-in the credentials by himself using the UIWebView.
Could someone provide the Xamarin solution for this? I tried it by myself but couldn't get it work.
Thanks in advance for your help.

Answer 1

I know this is quite an old post, but it was quite an interesting question, so I had to take a go at at. So if you still need it (most likely not) or if anyone finds this post, here are a ported version of the native UIWebView with support for self signed. It can be used as a regular UIWebView with the exception that it takes a hostname as additional parameter, which should be the hostname of the page where certificate check should be disabled.
public class InsecureWebView : UIWebView, INSUrlConnectionDataDelegate, IUIWebViewDelegate
{
public InsecureWebView(string baseUrl) : base()
{
Setup (baseUrl);
}
public InsecureWebView(CoreGraphics.CGRect rect, string baseUrl) : base(rect)
{
Setup (baseUrl);
}
public InsecureWebView(NSCoder coder, string baseUrl) : base(coder)
{
Setup (baseUrl);
}
public InsecureWebView(NSObjectFlag t, string baseUrl) : base(t)
{
Setup (baseUrl);
}
public InsecureWebView(IntPtr handler, string baseUrl) : base(handler)
{
Setup (baseUrl);
}
string baseUrl = null;
bool authenticated;
NSUrlRequest failedRequest;
private void Setup(string baseUrl)
{
this.Delegate = this;
this.baseUrl = baseUrl;
}
[Foundation.Export ("webView:shouldStartLoadWithRequest:navigationType:")]
public bool ShouldStartLoad (UIKit.UIWebView webView, Foundation.NSUrlRequest request, UIKit.UIWebViewNavigationType navigationType)
{
var result = authenticated;
if (!authenticated) {
failedRequest = request;
NSUrlConnection.FromRequest (request, this);
}
return result;
}
[Foundation.Export ("connection:willSendRequestForAuthenticationChallenge:")]
public void WillSendRequestForAuthenticationChallenge (NSUrlConnection connection, NSUrlAuthenticationChallenge challenge)
{
if (challenge.ProtectionSpace.AuthenticationMethod == NSUrlProtectionSpace.AuthenticationMethodServerTrust) {
var baseUrl = new NSUrl (this.baseUrl);
if (challenge.ProtectionSpace.Host == baseUrl.Host) {
challenge.Sender.UseCredential (NSUrlCredential.FromTrust (challenge.ProtectionSpace.ServerSecTrust), challenge);
}
}
challenge.Sender.ContinueWithoutCredential (challenge);
}
[Foundation.Export ("connection:didReceiveResponse:")]
public void DidReceivedResponse(NSUrlConnection connection, NSUrlResponse response)
{
authenticated = true;
connection.Cancel ();
LoadRequest (failedRequest);
}
}