| 1 | /* $Id: DrvHostCoreAudio-auth.mm 86221 2020-09-22 14:10:23Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VBox audio devices - Mac OS X CoreAudio audio driver, authorization helpers for Mojave+.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2020 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 |
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| 19 | /*********************************************************************************************************************************
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| 20 | * Header Files *
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| 21 | *********************************************************************************************************************************/
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| 22 | #define LOG_GROUP LOG_GROUP_DRV_HOST_AUDIO
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| 23 | #include <VBox/log.h>
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| 24 |
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| 25 | #include <iprt/errcore.h>
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| 26 | #include <iprt/semaphore.h>
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| 27 |
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| 28 | #import <AVFoundation/AVFoundation.h>
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| 29 | #import <AVFoundation/AVMediaFormat.h>
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| 30 | #import <Foundation/NSException.h>
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| 31 |
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| 32 |
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| 33 | #if MAC_OS_X_VERSION_MIN_REQUIRED < 101400
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| 34 |
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| 35 | /* HACK ALERT! It's there in the 10.13 SDK, but only for iOS 7.0+. Deploying CPP trickery to shut up warnings/errors. */
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| 36 | # if MAC_OS_X_VERSION_MIN_REQUIRED >= 101300
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| 37 | # define AVAuthorizationStatus OurAVAuthorizationStatus
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| 38 | # define AVAuthorizationStatusNotDetermined OurAVAuthorizationStatusNotDetermined
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| 39 | # define AVAuthorizationStatusRestricted OurAVAuthorizationStatusRestricted
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| 40 | # define AVAuthorizationStatusDenied OurAVAuthorizationStatusDenied
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| 41 | # define AVAuthorizationStatusAuthorized OurAVAuthorizationStatusAuthorized
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| 42 | # endif
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| 43 |
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| 44 | /**
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| 45 | * The authorization status enum.
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| 46 | *
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| 47 | * Starting macOS 10.14 we need to request permissions in order to use any audio input device
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| 48 | * but as we build against an older SDK where this is not available we have to duplicate
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| 49 | * AVAuthorizationStatus and do everything dynmically during runtime, sigh...
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| 50 | */
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| 51 | typedef enum AVAuthorizationStatus: NSInteger
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| 52 | {
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| 53 | AVAuthorizationStatusNotDetermined = 0,
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| 54 | AVAuthorizationStatusRestricted = 1,
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| 55 | AVAuthorizationStatusDenied = 2,
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| 56 | AVAuthorizationStatusAuthorized = 3,
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| 57 | } AVAuthorizationStatus;
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| 58 |
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| 59 | #endif
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| 60 |
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| 61 |
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| 62 | /**
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| 63 | * Requests camera permissions for Mojave and onwards.
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| 64 | *
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| 65 | * @returns VBox status code.
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| 66 | */
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| 67 | static int coreAudioInputPermissionRequest(void)
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| 68 | {
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| 69 | __block RTSEMEVENT hEvt = NIL_RTSEMEVENT;
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| 70 | __block int rc = RTSemEventCreate(&hEvt);
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| 71 | if (RT_SUCCESS(rc))
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| 72 | {
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| 73 | /* Perform auth request. */
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| 74 | [AVCaptureDevice performSelector: @selector(requestAccessForMediaType: completionHandler:) withObject: (id)AVMediaTypeAudio withObject: (id)^(BOOL granted) {
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| 75 | if (!granted) {
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| 76 | LogRel(("CoreAudio: Access denied!\n"));
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| 77 | rc = VERR_ACCESS_DENIED;
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| 78 | }
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| 79 | RTSemEventSignal(hEvt);
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| 80 | }];
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| 81 |
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| 82 | rc = RTSemEventWait(hEvt, 10 * RT_MS_1SEC);
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| 83 | RTSemEventDestroy(hEvt);
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| 84 | }
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| 85 |
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| 86 | return rc;
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| 87 | }
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| 88 |
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| 89 | /**
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| 90 | * Checks permission for capturing devices on Mojave and onwards.
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| 91 | *
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| 92 | * @returns VBox status code.
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| 93 | */
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| 94 | DECLHIDDEN(int) coreAudioInputPermissionCheck(void)
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| 95 | {
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| 96 | int rc = VINF_SUCCESS;
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| 97 |
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| 98 | if (NSFoundationVersionNumber >= 10.14)
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| 99 | {
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| 100 | /*
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| 101 | * Because we build with an older SDK where the authorization APIs are not available
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| 102 | * (introduced with Mojave 10.14) we have to resort to resolving the APIs dynamically.
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| 103 | */
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| 104 | LogRel(("CoreAudio: macOS 10.14+ detected, checking audio input permissions\n"));
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| 105 |
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| 106 | if ([AVCaptureDevice respondsToSelector:@selector(authorizationStatusForMediaType:)])
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| 107 | {
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| 108 | AVAuthorizationStatus enmAuthSts = (AVAuthorizationStatus)(NSInteger)[AVCaptureDevice performSelector: @selector(authorizationStatusForMediaType:) withObject: (id)AVMediaTypeAudio];
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| 109 | if (enmAuthSts == AVAuthorizationStatusNotDetermined)
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| 110 | rc = coreAudioInputPermissionRequest();
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| 111 | else if ( enmAuthSts == AVAuthorizationStatusRestricted
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| 112 | || enmAuthSts == AVAuthorizationStatusDenied)
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| 113 | {
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| 114 | LogRel(("CoreAudio: Access denied!\n"));
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| 115 | rc = VERR_ACCESS_DENIED;
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| 116 | }
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| 117 | }
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| 118 | }
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| 119 |
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| 120 | return rc;
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| 121 | }
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