macOS development - 10.15 Screen Recording screen recording and authorized Jump

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method

1, the authority to determine

Under the SIP (under normal circumstances):

- (BOOL)canRecord{
    CGDisplayStreamRef stream = CGDisplayStreamCreate(CGMainDisplayID() , 1, 1, kCVPixelFormatType_32ABGR, nil, ^(CGDisplayStreamFrameStatus status, uint64_t displayTime, IOSurfaceRef  _Nullable frameSurface, CGDisplayStreamUpdateRef  _Nullable updateRef) {
        
    });
    
    BOOL canRecord = stream != NULL;
    if (stream) {
        CFRelease(stream);
    }
    
    NSLog(@"canRecord : %ld",canRecord);
    return canRecord;
}

If insensitive, try to use tccutil reset All com.xx.xxto try to clean up the authorization.

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In the case of closing the SIP, can be obtained by reading all authorized tcc.data.
If it returns 1, the authorized representative of success; return 0 or nothing to return to, on behalf of is not authorized. In particular there is no user operation, the need for further discrimination.

$ sqlite3 /Library/Application\ Support/com.apple.TCC/TCC.db "SELECT  allowed  from access WHERE client='com.ms.AuthDemo' AND service='kTCCServiceScreenCapture';"

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2. Application for authorization

Call the screenshot method, will be transferred from the application permissions window system;
but here, whether or not authorization is successful, we are able screenshots.
Therefore, this method is not suitable to do right judgment.

- (void)showScreenRecordingPrompt{
  
  /* macos 10.14 and lower do not require screen recording permission to get window titles */
  if(@available(macos 10.15, *)) {
    /*
     To minimize the intrusion just make a 1px image of the upper left corner
     This way there is no real possibilty to access any private data
     */
    CGImageRef c = CGWindowListCreateImage(
                                                    CGRectMake(0, 0, 1, 1),
                                                    kCGWindowListOptionOnScreenOnly,
                                                    kCGNullWindowID,
                                                    kCGWindowImageDefault);
  
      CFRelease(screenshot);

}

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3, jump privacy panel

- (void)openSetting{
    NSString *urlString = @"x-apple.systempreferences:com.apple.preference.security?Privacy_ScreenCapture";
    [[NSWorkspace sharedWorkspace] openURL:[NSURL URLWithString:urlString]];
}

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Exploration experience

1, about 10.15 permissions

It suggested that the main machine currently do not upgrade to 10.15. However, after the upgrade, only to find non-main machine is so important. Encounter various problems when sincerely feel really SB.
But for this fall compatible system, which is essential. 10.14 permission to start more and more strict, 10.15 has added some authority.

If you just open the panel, it is very easy. But requires precise open the corresponding tab is more user-friendly. How to get these Privacy field it? The first thing I think of is that the system language into English. We can see the following effect:

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2, on the privacy panel Jump

Microphone This jump is very direct, address access Privacy_Microphoneto:
@"x-apple.systempreferences:com.apple.preference.security?Privacy_Microphone";

So Screen Recordingwhat? The following natural conjecture

• Privacy_ScreenRecording
• Privacy_Screen_Recording
• Privacy_Screen\n Recording

Of course, it is null and void;

So how do you get the corresponding permission to name it?

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3, get preferences plist information

There is such a plist file, whether to save the configuration information we do?
~/Library/Preferences/com.apple.systempreferences.plist

Apparently not.

By checking / cancellation of part of rights, no data is stored here. Here are just save this using panel data. Such as:

• SecurityPrefTab On behalf of the security of the newly selected tab
• com.apple.SecurityPref.Privacy.LastSourceSelected Privacy representatives selected in the first few item.

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4、tcc

Before - "macOS Development NSMicrophoneUsageDescription (10.14 mojave rights issue" https://blog.csdn.net/lovechris00/article/details/83542730 wrote, if you like to clean up the authorization record, need to use tccutil command (and still do not. tcc figure out what the acronym, I know of a small partner to leave a message). so if there is relevant information tcc in it?
man tccutiland I did not give similar information, feel tccutil just to clean up, and can not be added.

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But indeed tcc database for managing authorization data, the following two db management authorization information:
~/Library/Application Support/com.apple.TCC/TCC.db
/Library/Application Support/com.apple.TCC/TCC.db

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A can of CRUD tccutil
https://github.com/jacobsalmela/tccutil

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5, using AppleScript get preference pane information

https://apple.stackexchange.com/questions/361045/open-system-preferences-privacy-full-disk-access-with-url
StackOverflow above method using AppleScript:

tell application "System Preferences" to get name of anchors of current pane

I tried, and she saw some familiar words:
but the drawback is that the data is incomplete.

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6、OS X System Preference Links

Mac on the "Privacy" Preferences
https://support.apple.com/zh-cn/guide/mac-help/mh32356/mac

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Encountered such a site, gives some privacy fields:
https://macosxautomation.com/system-prefs-links.html

https://stackoverflow.com/questions/6652598/cocoa-button-opens-a-system-preference-page

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Accessibility Preference Pane

Main	x-apple.systempreferences:com.apple.preference.universalaccess
Display	Seeing_Display
Zoom	Seeing_Zoom
VoiceOver	Seeing_VoiceOver
Descriptions	Media_Descriptions
Captions	Captioning
Audio	Hearing
Keyboard	Keyboard
Mouse & Trackpad	Mouse
Switch Control	Switch
Dictation	Shpeakbleitems

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Security & Privacy Preference Pane

Main	x-apple.systempreferences:com.apple.preference.security
General	General
FileVault	FDE
Firewall	Firewall
Advanced	Advanced
Privacy	Privacy
Privacy-Camera	Privacy_Camera
Privacy-Microphone	Privacy_Microphone
Automation	Privacy_Automation
AllFiles	Privacy_AllFiles
Accessibility	Privacy_Accessibility
Assistive	Privacy_Assistive
Location Services	Privacy_LocationServices
SystemServices	Privacy_SystemServices
Advertising	Privacy_Advertising
Contacts	Privacy_Contacts
Diagnostics & Usage	Privacy_Diagnostics
Calendars	Privacy_Calendars
Reminders	Privacy_Reminders
Facebook	Privacy_Facebook
LinkedIn	Privacy_LinkedIn
Twitter	Privacy_Twitter
Weibo	Privacy_Weibo
Tencent Weibo	Privacy_TencentWeibo

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Catalina macOS 10.15:

ScreenCapture/Screen Recording	Privacy_ScreenCapture
DevTools	Privacy_DevTools
InputMonitoring	Privacy_ListenEvent
DesktopFolder	Privacy_DesktopFolder
DocumentsFolder	Privacy_DocumentsFolder
DownloadsFolder	Privacy_DownloadsFolder
NetworkVolume	Privacy_NetworkVolume
RemovableVolume	Privacy_RemovableVolume
SpeechRecognition	Privacy_SpeechRecognition

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Dictation & Speech Preference Pane

Main	x-apple.systempreferences:com.apple.preference.speech
Dictation	Dictation
Text to Speech	TTS

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Sharing Preference Pane

Main	x-apple.systempreferences:com.apple.preferences.sharing
Screen Sharing	Services_ScreenSharing
File Sharing	Services_PersonalFileSharing
Printer Sharing	Services_PrinterSharing
Remote Login	Services_RemoteLogin
Remote Management	Services_ARDService
Remote Apple Events	Services_RemoteAppleEvent
Internet Sharing	Internet
Bluetooth Sharing	Services_BluetoothSharing