SEBMAC-587 Now detecting and denying to run when custom Cocoa Text Sy…

…stem key bindings are set.
SafeExamBrowser · May 15, 2024 · 3b547fa · 3b547fa
1 parent 5c4aa4a
commit 3b547fa
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diff --git a/Classes/Global/Constants.h b/Classes/Global/Constants.h
@@ -554,6 +554,7 @@ static NSString __unused *BTouchBarRestartAgent = @"BTTRelaunch";
 static NSString __unused *WebKitNetworkingProcessBundleID = @"com.apple.WebKit.Networking";
 static NSString __unused *UniversalControlBundleID = @"com.apple.universalcontrol";
 static NSString __unused *KeyboardViewerBundleID = @"com.apple.inputmethod.AssistiveControl";
+static NSString __unused *KeyBindingsPath = @"/KeyBindings/DefaultKeyBinding.dict";
 static NSString __unused *cachedTouchBarGlobalSettingsKey = @"cachedTouchBarGlobalSettingsKey";
 static NSString __unused *cachedTouchBarFnDictionarySettingsKey = @"cachedTouchBarFnDictionarySettingsKey";
 static NSString __unused *systemPreferencesBundleID = @"com.apple.systempreferences";

diff --git a/Classes/SEBController.m b/Classes/SEBController.m
@@ -847,6 +847,30 @@ - (void)applicationDidFinishLaunching:(NSNotification *)notification
     DDLogDebug(@"%s", __FUNCTION__);
     NSApp.presentationOptions |= (NSApplicationPresentationDisableForceQuit | NSApplicationPresentationHideDock);
 
+    NSArray <NSString *> *libraryDirs = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory,
+                                                              NSLocalDomainMask | NSUserDomainMask,
+                                                              YES);
+    NSFileManager *fileManager= [NSFileManager defaultManager];
+
+    for (NSString *libraryDir in libraryDirs) {
+        BOOL isDir;
+        NSString *keyBindingsFilePath = [libraryDir stringByAppendingPathComponent:KeyBindingsPath];
+        if ([fileManager fileExistsAtPath:keyBindingsFilePath isDirectory:&isDir]) {
+            DDLogError(@"Cocoa Text System key bindings file detected: at path %@", keyBindingsFilePath);
+            NSAlert *modalAlert = [self newAlert];
+            [modalAlert setMessageText:NSLocalizedString(@"Custom Key Binding Detected", @"")];
+            [modalAlert setInformativeText:[NSString stringWithFormat:NSLocalizedString(@"SEB doesn't allow to use custom key bindings. Please delete or rename the file at the path %@ and restart SEB", @""), keyBindingsFilePath]];
+            [modalAlert addButtonWithTitle:NSLocalizedString(@"Quit", @"")];
+            [modalAlert setAlertStyle:NSAlertStyleCritical];
+            void (^keyBindingDetectedHandler)(NSModalResponse) = ^void (NSModalResponse answer) {
+                [self removeAlertWindow:modalAlert.window];
+                [self quitSEBOrSession];
+            };
+            [self runModalAlert:modalAlert conditionallyForWindow:self.browserController.mainBrowserWindow completionHandler:(void (^)(NSModalResponse answer))keyBindingDetectedHandler];
+            return;
+        }
+    }
+
     // Check if the font download alert was triggered from a web page
     // and SEB didn't had Accessibility permissions
     // and therefore was terminated to prevent a modal lock