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By default, Flutter apps only do default AppKit app serialisation of Window location etc. and by default, state serialisation in AppKit apps is compatible with `NSSecureCoding`. AppKit apps generated since Xcode 13.2 include this method in the app delegate generated by the default app template. Background ========== This method was added to opt into having [de]serialization require a coder implementing the `NSSecureCoding` protocol. Apple wasn't able to force this across the board, because `NSSecureCoding` limits certain behaviours during deserialisation, which some third-party apps have have previously relied on. Specific background on the sorts of vulnerabilities that `NSSecureCoding` was designed to prevent are described in the `NSSecureCoding` documentation: https://developer.apple.com/documentation/foundation/nssecurecoding?language=objc A demonstration of a root privilege escalation and SIP bypass vulnerability is described in the following blog post: https://sector7.computest.nl/post/2022-08-process-injection-breaking-all-macos-security-layers-with-a-single-vulnerability/ Fixes: https://github.com/flutter/flutter/issues/150062 ## Pre-launch Checklist - [X] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [X] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [X] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [X] I signed the [CLA]. - [X] I listed at least one issue that this PR fixes in the description above. - [X] I updated/added relevant documentation (doc comments with `///`). - [ ] I added new tests to check the change I am making, or this PR is [test-exempt]. - [X] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [X] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-new channel on [Discord]. <!-- Links --> [Contributor Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview [Tree Hygiene]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md [test-exempt]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests [Flutter Style Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md [Features we expect every widget to implement]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md [Data Driven Fixes]: https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md |
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Example of switching between full-screen Flutter and Platform View
This project demonstrates how to bring up a full-screen iOS/Android view from a full-screen Flutter view along with passing data back and forth between the two.
On iOS, we use a CocoaPods dependency to add a Material Design button, and so
pod install needs to be invoked in the ios/ folder before flutter run:
pushd ios/ ; pod install ; popd
flutter run