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1 /*
2 * Copyright (c) 2017 Apple Inc. All Rights Reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23
24 #import <Foundation/Foundation.h>
25 #import "SOSEnsureBackup.h"
26 #include <utilities/debugging.h>
27
28 #if OCTAGON
29 #import "keychain/ckks/CKKSLockStateTracker.h"
30 #import "keychain/ckks/NSOperationCategories.h"
31 #include <Security/SecureObjectSync/SOSAccount.h>
32
33 static NSOperationQueue *backupOperationQueue;
34 static CKKSLockStateTracker *lockStateTracker;
35
36 void SOSEnsureBackupWhileUnlocked(void) {
37 static dispatch_once_t onceToken;
38 dispatch_once(&onceToken, ^{
39 backupOperationQueue = [NSOperationQueue new];
40 lockStateTracker = [CKKSLockStateTracker new];
41 });
42
43 // CKKSLockStateTracker does not use @synchronized(self). If it ever starts to this needs to be updated.
44 @synchronized(lockStateTracker) {
45 if ([backupOperationQueue operationCount] > 0) {
46 secnotice("engine", "SOSEnsureBackup: Backup already scheduled for next unlock");
47 } else {
48 secnotice("engine", "SOSEnsureBackup: Scheduling a backup for next unlock");
49 NSBlockOperation *backupOperation = [NSBlockOperation blockOperationWithBlock:^{
50 secnotice("engine", "Performing keychain backup after unlock because backing up while locked failed");
51 SOSAccount *account = (__bridge SOSAccount *)(SOSKeychainAccountGetSharedAccount());
52
53 [account performTransaction:^(SOSAccountTransaction *transaction) {
54 CFErrorRef error = NULL;
55 NSSet* set = CFBridgingRelease(SOSAccountCopyBackupPeersAndForceSync(transaction, &error));
56 if (set) {
57 secnotice("engine", "SOSEnsureBackup: SOS made a backup of views: %@", set);
58 } else {
59 secerror("engine: SOSEnsureBackup: encountered an error while making backup (%@)", error);
60 }
61
62 CFReleaseNull(error);
63 }];
64 }];
65 [backupOperation addNullableDependency:lockStateTracker.unlockDependency];
66 [backupOperationQueue addOperation:backupOperation];
67 }
68 }
69 }
70 #else
71 void SOSEnsureBackupWhileUnlocked(void) {
72 secnotice("engine", "SOSEnsureBackup not available on this platform");
73 }
74 #endif