iCloud verification code pop-up on Windows disconnects and blocks streaming via Moonlight

[gaetanverbrugghehogent]

Describe the bug I have the iCloud Keychain extension for Chrome installed on the server. Whenever you go to a site that asks for a password, you have to enter a 6-digit verification code first that pops up on screen. After that you can select the saved password. I connected to my server using mstsc so that I would have full remote desktop functionality, but when the verification code pop-up appears the stream is disconnected and it is impossible to reconnect until you physically close the pop-up on the server.

Steps to reproduce

• Install iCloud application for Windows on server
• Enable iCloud Keychain
• Install iCloud passwords Chrome extension
• Connect to server
• Go to website with a saved password
• Click the iCloud Keychain extension to access passwords

Screenshots https://user-images.githubusercontent.com/80333845/141130070-f5b0bfa6-7f6e-4f84-93d6-b1005b8b2924.mov

Other Moonlight clients

• Does the issue occur when using Moonlight on iOS or Android? Yes

Moonlight settings (please complete the following information)

• Have any settings been adjusted from defaults? Yes
• If so, which settings have been changed? Bitrate lowered to 30Mbps, inverted scrolling enabled
• Does the problem still occur after reverting settings back to default? Yes

Client PC details (please complete the following information)

• OS: macOS 12.0.1
• Moonlight Version: 3.1.4
• GPU: Radeon Pro 555X

Server PC details (please complete the following information)

• OS: Windows 10 20H2 Build 19042.1288
• GeForce Experience version: 3.23.0.74
• Nvidia GPU driver: RTX 2060 Super driver version: 496.49
• Antivirus and firewall software: Windows Defender and Windows Firewall

Moonlight Logs (please attach) Moonlight-1636403467.log Moonlight-1636410637.log Moonlight-1636412929.log Moonlight-1636413324.log Moonlight-1636413358.log Moonlight-1636413579.log Moonlight-1636413864.log Moonlight-1636414396.log Moonlight-1636414904.log Moonlight-1636470244.log Moonlight-1636481395.log Moonlight-1636552396.log

Additional context Anything else you think may be relevant to the issue

[cgutman]

It looks like Apple is using the Windows DRM APIs to prevent display capture while the prompt is being displayed.

We can confirm by looking at your host-side logs from C:\ProgramData\NVIDIA Corporation\NvStream after a disconnect happens.

[gaetanverbrugghehogent]

Thanks for the reply. This is the host-side log: NvStreamerCurrent.log

If the issue is what you described earlier, is there any way to fix this other than by disabling iCloud Keychain?

[cgutman]

Yep, confirmed in the logs that it's due to protected content:

moonlight-stream/moonlight-qt#9(W)[2021-11-10 14:08:50,104]=15:08:50={8492}<Fbc7FrameProvide> Capture failure, reported capture resolution is 0 x 0 pitch 0. Writing a black frame.
#0(I)[2021-11-10 14:08:50,104]=15:08:50={8492}<Fbc7FrameProvide> Capture resolution is now 1280 x 720 pitch 0.
moonlight-stream/moonlight-qt#1(W)[2021-11-10 14:08:50,104]=15:08:50={8492}<Fbc7FrameProvide> Failed to grab frame as it is protected content.
moonlight-stream/moonlight-qt#2(E)[2021-11-10 14:08:50,104]=15:08:50={8492}<Fbc7FrameProvide> Failed to grab frame: -4 (NVFBC_ERROR_PROTECTED_CONTENT).
moonlight-stream/moonlight-qt#3(E)[2021-11-10 14:08:50,104]=15:08:50={8492}<CaptureThread>    Failed to capture frame 0.
moonlight-stream/moonlight-qt#4(I)[2021-11-10 14:08:50,104]=15:08:50={8492}<CaptureThread>    Finished with status STATUS_GRAB_ERROR after capturing 0 frames
moonlight-stream/moonlight-qt#5(I)[2021-11-10 14:08:50,104]=15:08:50={8492}<CaptureThread>    Dropped 0 frames (0.000%)
moonlight-stream/moonlight-qt#6(I)[2021-11-10 14:08:50,104]=15:08:50={8492}<CaptureThread>    Capture ended abnormally

If there's no way to turn off this sort of protection in iCloud Keychain, then yeah unfortunately I don't think there are any workarounds.