OTModifyUserControllableViewStatusOperation.m   [plain text]

/*
* Copyright (c) 2020 Apple Inc. All Rights Reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* @APPLE_LICENSE_HEADER_END@
*/

#if OCTAGON

#import <TrustedPeers/TrustedPeers.h>
#import "keychain/ckks/CKKSAnalytics.h"
#import "keychain/ot/categories/OTAccountMetadataClassC+KeychainSupport.h"
#import "keychain/ot/OTModifyUserControllableViewStatusOperation.h"
#import "keychain/ot/OTStates.h"
#import "keychain/ot/ObjCImprovements.h"
#import "keychain/TrustedPeersHelper/TrustedPeersHelperProtocol.h"

@interface OTModifyUserControllableViewStatusOperation ()
@property OTOperationDependencies* deps;

@property OctagonState* peerMissingState;

@property TPPBPeerStableInfo_UserControllableViewStatus intendedViewStatus;
@end

@implementation OTModifyUserControllableViewStatusOperation
@synthesize intendedState = _intendedState;
@synthesize nextState = _nextState;

- (instancetype)initWithDependencies:(OTOperationDependencies*)dependencies
intendedViewStatus:(TPPBPeerStableInfo_UserControllableViewStatus)intendedViewStatus
intendedState:(OctagonState*)intendedState
peerMissingState:(OctagonState*)peerMissingState
errorState:(OctagonState*)errorState
{
if ((self = [super init])) {
_deps = dependencies;

_intendedViewStatus = intendedViewStatus;

_intendedState = intendedState;
_peerMissingState = peerMissingState;
_nextState = errorState;
}
return self;
}

- (void)groupStart
{

if(self.intendedViewStatus == TPPBPeerStableInfo_UserControllableViewStatus_FOLLOWING) {
#if TARGET_OS_WATCH || TARGET_OS_TV
// Watches and TVs want to be able to set the FOLLOWING state
[self performWithStatus:self.intendedViewStatus];
#else
// For other platforms, we want to determine the actual state by asking
WEAKIFY(self);

// Should we ask SOS? Or Octagon?
if(self.deps.sosAdapter.sosEnabled) {
NSError* error = nil;
BOOL safariViewEnabled = [self.deps.sosAdapter safariViewSyncingEnabled:&error];

if(error) {
secerror("octagon-ckks: Unable to fetch SOS Safari view status: %@", error);
self.error = error;
return;
}

secnotice("octagon-ckks", "Currently SOS believes the safari view is '%@'", safariViewEnabled ? @"enabled" : @"disabled");

TPPBPeerStableInfo_UserControllableViewStatus status = safariViewEnabled ?
TPPBPeerStableInfo_UserControllableViewStatus_ENABLED :
TPPBPeerStableInfo_UserControllableViewStatus_DISABLED;

[self performWithStatus:status];
return;
}

secnotice("octagon-ckks", "Determining peers' user-controllable views policy");

[self.deps.cuttlefishXPCWrapper fetchCurrentPolicyWithContainer:self.deps.containerName
context:self.deps.contextID
modelIDOverride:nil
reply:^(TPSyncingPolicy* _Nullable syncingPolicy,
TPPBPeerStableInfo_UserControllableViewStatus userControllableViewStatusOfPeers,
NSError* _Nullable error) {
STRONGIFY(self);

if(error) {
secnotice("octagon-ckks", "Determining peers' user-controllable views policy failed: %@", error);
self.error = error;
return;
}

secnotice("octagon-ckks", "Retrieved peers' user-controllable views policy as: %@",
TPPBPeerStableInfo_UserControllableViewStatusAsString(userControllableViewStatusOfPeers));

[self performWithStatus:userControllableViewStatusOfPeers];
return;
}];
#endif

} else {
[self performWithStatus:self.intendedViewStatus];
}
}

- (void)performWithStatus:(TPPBPeerStableInfo_UserControllableViewStatus)intendedViewStatus
{
WEAKIFY(self);

secnotice("octagon-ckks", "Setting user-controllable views to %@", TPPBPeerStableInfo_UserControllableViewStatusAsString(self.intendedViewStatus));

[self.deps.cuttlefishXPCWrapper updateWithContainer:self.deps.containerName
context:self.deps.contextID
deviceName:nil
serialNumber:nil
osVersion:nil
policyVersion:nil
policySecrets:nil
syncUserControllableViews:[NSNumber numberWithInt:intendedViewStatus]
reply:^(TrustedPeersHelperPeerState* peerState, TPSyncingPolicy* syncingPolicy, NSError* error) {
STRONGIFY(self);
if(error || !syncingPolicy) {
secerror("octagon-ckks: setting user-controllable views status errored: %@", error);
self.error = error;

if([self.deps.lockStateTracker isLockedError:self.error]) {
secnotice("octagon-ckks", "Updating user-controllable view status failed because of lock state, will retry once unlocked: %@", self.error);
OctagonPendingFlag* pendingFlag = [[OctagonPendingFlag alloc] initWithFlag:OctagonFlagAttemptUserControllableViewStatusUpgrade
conditions:OctagonPendingConditionsDeviceUnlocked];

[self.deps.flagHandler handlePendingFlag:pendingFlag];
}
if(peerState.peerStatus & (TPPeerStatusExcluded | TPPeerStatusUnknown)) {
secnotice("octagon-ckks", "Updating user-controllable view status failed because our self peer is excluded or missing");
self.nextState = self.peerMissingState;
}
return;
}

secnotice("octagon-ckks", "Received syncing policy %@ with view list: %@", syncingPolicy, syncingPolicy.viewList);

NSError* stateError = nil;
[self.deps.stateHolder persistAccountChanges:^OTAccountMetadataClassC * _Nullable(OTAccountMetadataClassC * _Nonnull metadata) {
[metadata setTPSyncingPolicy:syncingPolicy];
return metadata;
} error:&stateError];

if(stateError) {
secerror("octagon: failed to save policy+views: %@", stateError);
self.error = stateError;
return;
}

[self.deps.viewManager setCurrentSyncingPolicy:syncingPolicy];

self.nextState = self.intendedState;
}];
}

@end

#endif // OCTAGON