[webview_flutter_wkwebview] Support NTLM for authentication (#7670)

This change allows wkwebview to support NTLM on iOS.

[#155427](flutter/flutter#155427)

Author: jtanium

packages/webview_flutter/webview_flutter_wkwebview/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 3.16.0
+
+* Supports NTLM for authentication.
+
 ## 3.15.0
 
 * Adds macOS support.

packages/webview_flutter/webview_flutter_wkwebview/lib/src/foundation/foundation.dart

@@ -505,6 +505,9 @@ class NSUrlAuthenticationMethod {
 
   /// Use HTTP digest authentication for this protection space.
   static const String httpDigest = 'NSURLAuthenticationMethodHTTPDigest';
+
+  /// Use NTLM authentication for this protection space.
+  static const String httpNtlm = 'NSURLAuthenticationMethodNTLM';
 }
 
 /// A challenge from a server requiring authentication from the client.

packages/webview_flutter/webview_flutter_wkwebview/lib/src/webkit_webview_controller.dart

@@ -1147,7 +1147,9 @@ class WebKitNavigationDelegate extends PlatformNavigationDelegate {
         ) completionHandler,
       ) {
         if (challenge.protectionSpace.authenticationMethod ==
-            NSUrlAuthenticationMethod.httpBasic) {
+                NSUrlAuthenticationMethod.httpBasic ||
+            challenge.protectionSpace.authenticationMethod ==
+                NSUrlAuthenticationMethod.httpNtlm) {
           final void Function(HttpAuthRequest)? callback =
               weakThis.target?._onHttpAuthRequest;
           final String? host = challenge.protectionSpace.host;

packages/webview_flutter/webview_flutter_wkwebview/pubspec.yaml

@@ -2,7 +2,7 @@ name: webview_flutter_wkwebview
 description: A Flutter plugin that provides a WebView widget based on Apple's WKWebView control.
 repository: https://github.com/flutter/packages/tree/main/packages/webview_flutter/webview_flutter_wkwebview
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+webview%22
-version: 3.15.0
+version: 3.16.0
 
 environment:
   sdk: ^3.5.0

packages/webview_flutter/webview_flutter_wkwebview/test/webkit_navigation_delegate_test.dart

@@ -309,6 +309,44 @@ void main() {
       expect(callbackHost, expectedHost);
       expect(callbackRealm, expectedRealm);
     });
+
+    test('onHttpNtlmAuthRequest emits host and realm', () {
+      final WebKitNavigationDelegate iosNavigationDelegate =
+          WebKitNavigationDelegate(
+        const WebKitNavigationDelegateCreationParams(
+          webKitProxy: WebKitProxy(
+            createNavigationDelegate: CapturingNavigationDelegate.new,
+          ),
+        ),
+      );
+
+      String? callbackHost;
+      String? callbackRealm;
+
+      iosNavigationDelegate.setOnHttpAuthRequest((HttpAuthRequest request) {
+        callbackHost = request.host;
+        callbackRealm = request.realm;
+      });
+
+      const String expectedHost = 'expectedHost';
+      const String expectedRealm = 'expectedRealm';
+
+      CapturingNavigationDelegate
+              .lastCreatedDelegate.didReceiveAuthenticationChallenge!(
+          WKWebViewIOS.detached(),
+          NSUrlAuthenticationChallenge.detached(
+            protectionSpace: NSUrlProtectionSpace.detached(
+              host: expectedHost,
+              realm: expectedRealm,
+              authenticationMethod: NSUrlAuthenticationMethod.httpNtlm,
+            ),
+          ),
+          (NSUrlSessionAuthChallengeDisposition disposition,
+              NSUrlCredential? credential) {});
+
+      expect(callbackHost, expectedHost);
+      expect(callbackRealm, expectedRealm);
+    });
   });
 }