CKKSViewManager.m   [plain text]

/*
* Copyright (c) 2016 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.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/

#import "keychain/ckks/CKKSViewManager.h"
#import "keychain/ckks/CKKSKeychainView.h"
#import "keychain/ckks/CKKSSynchronizeOperation.h"
#import "keychain/ckks/CKKSKey.h"
#import "keychain/ckks/CKKSZoneStateEntry.h"
#import "keychain/ckks/CKKSNearFutureScheduler.h"
#import "keychain/ckks/CKKSNotifier.h"
#import "keychain/ckks/CKKSCondition.h"
#import "keychain/ckks/CloudKitCategories.h"
#import "keychain/categories/NSError+UsefulConstructors.h"

#import "keychain/ot/OTDefines.h"

#import "SecEntitlements.h"

#include <securityd/SecDbItem.h>
#include <securityd/SecDbKeychainItem.h>
#include <securityd/SecItemSchema.h>
#include <Security/SecureObjectSync/SOSViews.h>

#import <Foundation/NSXPCConnection.h>
#import <Foundation/NSXPCConnection_Private.h>

#include <Security/SecureObjectSync/SOSAccount.h>
#include <Security/SecItemBackup.h>

#if OCTAGON
#import <CloudKit/CloudKit.h>
#import <CloudKit/CloudKit_Private.h>

#import <SecurityFoundation/SFKey.h>
#import <SecurityFoundation/SFKey_Private.h>

#import "CKKSAnalytics.h"
#endif

@interface CKKSViewManager () <NSXPCListenerDelegate>
#if OCTAGON
@property NSXPCListener *listener;

// Once you set these, all CKKSKeychainViews created will use them
@property (readonly) Class<CKKSFetchRecordZoneChangesOperation> fetchRecordZoneChangesOperationClass;
@property (readonly) Class<CKKSFetchRecordsOperation> fetchRecordsOperationClass;
@property (readonly) Class<CKKSQueryOperation> queryOperationClass;
@property (readonly) Class<CKKSModifySubscriptionsOperation> modifySubscriptionsOperationClass;
@property (readonly) Class<CKKSModifyRecordZonesOperation> modifyRecordZonesOperationClass;
@property (readonly) Class<CKKSAPSConnection> apsConnectionClass;
@property (readonly) Class<CKKSNotifier> notifierClass;
@property (readonly) Class<CKKSNSNotificationCenter> nsnotificationCenterClass;

@property NSMutableDictionary<NSString*, CKKSKeychainView*>* views;

@property NSMutableDictionary<NSString*, SecBoolNSErrorCallback>* pendingSyncCallbacks;
@property CKKSNearFutureScheduler* savedTLKNotifier;;
@property NSOperationQueue* operationQueue;

@property NSMapTable<dispatch_queue_t, id<CKKSPeerUpdateListener>>* peerChangeListeners;
#endif
@end

#if OCTAGON
@interface CKKSViewManager (lockstateTracker) <CKKSLockStateNotification>
@end
#endif

@implementation CKKSViewManager
#if OCTAGON

- (instancetype)initCloudKitWithContainerName: (NSString*) containerName usePCS:(bool)usePCS {
return [self initWithContainerName:containerName
usePCS:usePCS
fetchRecordZoneChangesOperationClass:[CKFetchRecordZoneChangesOperation class]
fetchRecordsOperationClass:[CKFetchRecordsOperation class]
queryOperationClass:[CKQueryOperation class]
modifySubscriptionsOperationClass:[CKModifySubscriptionsOperation class]
modifyRecordZonesOperationClass:[CKModifyRecordZonesOperation class]
apsConnectionClass:[APSConnection class]
nsnotificationCenterClass:[NSNotificationCenter class]
notifierClass:[CKKSNotifyPostNotifier class]];
}

- (instancetype)initWithContainerName: (NSString*) containerName
usePCS: (bool)usePCS
fetchRecordZoneChangesOperationClass: (Class<CKKSFetchRecordZoneChangesOperation>) fetchRecordZoneChangesOperationClass
fetchRecordsOperationClass: (Class<CKKSFetchRecordsOperation>)fetchRecordsOperationClass
queryOperationClass: (Class<CKKSQueryOperation>)queryOperationClass
modifySubscriptionsOperationClass: (Class<CKKSModifySubscriptionsOperation>) modifySubscriptionsOperationClass
modifyRecordZonesOperationClass: (Class<CKKSModifyRecordZonesOperation>) modifyRecordZonesOperationClass
apsConnectionClass: (Class<CKKSAPSConnection>) apsConnectionClass
nsnotificationCenterClass: (Class<CKKSNSNotificationCenter>) nsnotificationCenterClass
notifierClass: (Class<CKKSNotifier>) notifierClass
{
if(self = [super init]) {
_fetchRecordZoneChangesOperationClass = fetchRecordZoneChangesOperationClass;
_fetchRecordsOperationClass = fetchRecordsOperationClass;
_queryOperationClass = queryOperationClass;
_modifySubscriptionsOperationClass = modifySubscriptionsOperationClass;
_modifyRecordZonesOperationClass = modifyRecordZonesOperationClass;
_apsConnectionClass = apsConnectionClass;
_nsnotificationCenterClass = nsnotificationCenterClass;
_notifierClass = notifierClass;

_container = [self makeCKContainer: containerName usePCS:usePCS];
_accountTracker = [[CKKSCKAccountStateTracker alloc] init:self.container nsnotificationCenterClass:nsnotificationCenterClass];
_lockStateTracker = [[CKKSLockStateTracker alloc] init];
[_lockStateTracker addLockStateObserver:self];
_reachabilityTracker = [[CKKSReachabilityTracker alloc] init];

_zoneChangeFetcher = [[CKKSZoneChangeFetcher alloc] initWithContainer:_container
fetchClass:fetchRecordZoneChangesOperationClass
reachabilityTracker:_reachabilityTracker];

_operationQueue = [[NSOperationQueue alloc] init];

// Backwards from how we'd like, but it's the best way to have weak pointers to CKKSPeerUpdateListener.
_peerChangeListeners = [NSMapTable strongToWeakObjectsMapTable];

_views = [[NSMutableDictionary alloc] init];
_pendingSyncCallbacks = [[NSMutableDictionary alloc] init];

_initializeNewZones = false;

_completedSecCKKSInitialize = [[CKKSCondition alloc] init];

__weak __typeof(self) weakSelf = self;
_savedTLKNotifier = [[CKKSNearFutureScheduler alloc] initWithName:@"newtlks"
delay:5*NSEC_PER_SEC
keepProcessAlive:true
dependencyDescriptionCode:CKKSResultDescriptionNone
block:^{
[weakSelf notifyNewTLKsInKeychain];
}];

_listener = [NSXPCListener anonymousListener];
_listener.delegate = self;
[_listener resume];

// If this is a live server, register with notify
if(!SecCKKSTestsEnabled()) {
int token = 0;
notify_register_dispatch(kSOSCCCircleOctagonKeysChangedNotification, &token, dispatch_get_global_queue(QOS_CLASS_UTILITY, 0), ^(int t) {
// Since SOS doesn't change the self peer, we can reliably just send "trusted peers changed"; it'll be mostly right
secnotice("ckksshare", "Received a notification that the SOS Octagon peer set changed");
[weakSelf sendTrustedPeerSetChangedUpdate];
});
}
}
return self;
}

-(CKContainer*)makeCKContainer:(NSString*)containerName usePCS:(bool)usePCS {
CKContainer* container = [CKContainer containerWithIdentifier:containerName];
if(!usePCS) {
CKContainerOptions* containerOptions = [[CKContainerOptions alloc] init];
containerOptions.bypassPCSEncryption = YES;

// We don't have a great way to set these, so replace the entire container object
container = [[CKContainer alloc] initWithContainerID: container.containerID options:containerOptions];
}
return container;
}

- (void)setupAnalytics
{
__weak __typeof(self) weakSelf = self;

// Tests shouldn't continue here; it leads to entitlement crashes with CloudKit if the mocks aren't enabled when this function runs
if(SecCKKSTestsEnabled()) {
return;
}

[[CKKSAnalytics logger] AddMultiSamplerForName:@"CKKS-healthSummary" withTimeInterval:SFAnalyticsSamplerIntervalOncePerReport block:^NSDictionary<NSString *,NSNumber *> *{
__strong __typeof(self) strongSelf = weakSelf;
if(!strongSelf) {
return nil;
}

NSMutableDictionary* values = [NSMutableDictionary dictionary];
BOOL inCircle = (strongSelf.accountTracker.currentCircleStatus.status == kSOSCCInCircle);
if (inCircle) {
[[CKKSAnalytics logger] setDateProperty:[NSDate date] forKey:CKKSAnalyticsLastInCircle];
}
values[CKKSAnalyticsInCircle] = @(inCircle);

BOOL validCredentials = strongSelf.accountTracker.currentCKAccountInfo.hasValidCredentials;
if (!validCredentials) {
values[CKKSAnalyticsValidCredentials] = @(validCredentials);
}

NSArray<NSString *>* keys = @[ CKKSAnalyticsLastUnlock, CKKSAnalyticsLastInCircle];
for (NSString * key in keys) {
NSDate *date = [[CKKSAnalytics logger] datePropertyForKey:key];
values[key] = @([CKKSAnalytics fuzzyDaysSinceDate:date]);
}
return values;
}];

for (NSString* viewName in [self viewList]) {
[[CKKSAnalytics logger] AddMultiSamplerForName:[NSString stringWithFormat:@"CKKS-%@-healthSummary", viewName] withTimeInterval:SFAnalyticsSamplerIntervalOncePerReport block:^NSDictionary<NSString *,NSNumber *> *{
__strong __typeof(self) strongSelf = weakSelf;
if(!strongSelf) {
return nil;
}
BOOL inCircle = strongSelf.accountTracker && strongSelf.accountTracker.currentCircleStatus.status == kSOSCCInCircle;
NSMutableDictionary* values = [NSMutableDictionary dictionary];
CKKSKeychainView* view = [strongSelf findOrCreateView:viewName];
NSDate* dateOfLastSyncClassA = [[CKKSAnalytics logger] dateOfLastSuccessForEvent:CKKSEventProcessIncomingQueueClassA inView:view];
NSDate* dateOfLastSyncClassC = [[CKKSAnalytics logger] dateOfLastSuccessForEvent:CKKSEventProcessIncomingQueueClassC inView:view];
NSDate* dateOfLastKSR = [[CKKSAnalytics logger] datePropertyForKey:CKKSAnalyticsLastKeystateReady inView:view];

NSInteger fuzzyDaysSinceClassASync = [CKKSAnalytics fuzzyDaysSinceDate:dateOfLastSyncClassA];
NSInteger fuzzyDaysSinceClassCSync = [CKKSAnalytics fuzzyDaysSinceDate:dateOfLastSyncClassC];
NSInteger fuzzyDaysSinceKSR = [CKKSAnalytics fuzzyDaysSinceDate:dateOfLastKSR];
[values setValue:@(fuzzyDaysSinceClassASync) forKey:[NSString stringWithFormat:@"%@-daysSinceClassASync", viewName]];
[values setValue:@(fuzzyDaysSinceClassCSync) forKey:[NSString stringWithFormat:@"%@-daysSinceClassCSync", viewName]];
[values setValue:@(fuzzyDaysSinceKSR) forKey:[NSString stringWithFormat:@"%@-daysSinceLastKeystateReady", viewName]];

BOOL hasTLKs = [view.keyHierarchyState isEqualToString:SecCKKSZoneKeyStateReady] || [view.keyHierarchyState isEqualToString:SecCKKSZoneKeyStateReadyPendingUnlock];
/* only synced recently if between [0...7, ie withing 7 days */
BOOL syncedClassARecently = fuzzyDaysSinceClassASync >= 0 && fuzzyDaysSinceClassASync < 7;
BOOL syncedClassCRecently = fuzzyDaysSinceClassCSync >= 0 && fuzzyDaysSinceClassCSync < 7;
BOOL incomingQueueIsErrorFree = view.lastIncomingQueueOperation.error == nil;
BOOL outgoingQueueIsErrorFree = view.lastOutgoingQueueOperation.error == nil;

NSString* hasTLKsKey = [NSString stringWithFormat:@"%@-%@", viewName, CKKSAnalyticsHasTLKs];
NSString* syncedClassARecentlyKey = [NSString stringWithFormat:@"%@-%@", viewName, CKKSAnalyticsSyncedClassARecently];
NSString* syncedClassCRecentlyKey = [NSString stringWithFormat:@"%@-%@", viewName, CKKSAnalyticsSyncedClassCRecently];
NSString* incomingQueueIsErrorFreeKey = [NSString stringWithFormat:@"%@-%@", viewName, CKKSAnalyticsIncomingQueueIsErrorFree];
NSString* outgoingQueueIsErrorFreeKey = [NSString stringWithFormat:@"%@-%@", viewName, CKKSAnalyticsOutgoingQueueIsErrorFree];

values[hasTLKsKey] = @(hasTLKs);
values[syncedClassARecentlyKey] = @(syncedClassARecently);
values[syncedClassCRecentlyKey] = @(syncedClassCRecently);
values[incomingQueueIsErrorFreeKey] = @(incomingQueueIsErrorFree);
values[outgoingQueueIsErrorFreeKey] = @(outgoingQueueIsErrorFree);

BOOL weThinkWeAreInSync = inCircle && hasTLKs && syncedClassARecently && syncedClassCRecently && incomingQueueIsErrorFree && outgoingQueueIsErrorFree;
NSString* inSyncKey = [NSString stringWithFormat:@"%@-%@", viewName, CKKSAnalyticsInSync];
values[inSyncKey] = @(weThinkWeAreInSync);

return values;
}];
}
}

-(void)dealloc {
[self clearAllViews];
}

dispatch_queue_t globalZoneStateQueue = NULL;
dispatch_once_t globalZoneStateQueueOnce;

// We can't load the rate limiter in an init method, as the method might end up calling itself (if the database layer isn't yet initialized).
// Lazy-load it here.
- (CKKSRateLimiter*)getGlobalRateLimiter {
dispatch_once(&globalZoneStateQueueOnce, ^{
globalZoneStateQueue = dispatch_queue_create("CKKS global zone state", DISPATCH_QUEUE_SERIAL_WITH_AUTORELEASE_POOL);
});

if(_globalRateLimiter != nil) {
return _globalRateLimiter;
}

__block CKKSRateLimiter* blocklimit = nil;

dispatch_sync(globalZoneStateQueue, ^{
NSError* error = nil;

// Special object containing state for all zones. Currently, just the rate limiter.
CKKSZoneStateEntry* allEntry = [CKKSZoneStateEntry tryFromDatabase: @"all" error:&error];

if(error) {
secerror("CKKSViewManager: couldn't load global zone state: %@", error);
}

if(!error && allEntry.rateLimiter) {
blocklimit = allEntry.rateLimiter;
} else {
blocklimit = [[CKKSRateLimiter alloc] init];
}
});
_globalRateLimiter = blocklimit;
return _globalRateLimiter;
}

- (void)lockStateChangeNotification:(bool)unlocked
{
if (unlocked) {
[[CKKSAnalytics logger] setDateProperty:[NSDate date] forKey:CKKSAnalyticsLastUnlock];
}
}

// Mostly exists to be mocked out.
-(NSSet*)viewList {
return CFBridgingRelease(SOSViewCopyViewSet(kViewSetCKKS));
}

- (void)setView: (CKKSKeychainView*) obj {
CKKSKeychainView* kcv = nil;

@synchronized(self.views) {
kcv = self.views[obj.zoneName];
self.views[obj.zoneName] = obj;
}

if(kcv) {
[kcv cancelAllOperations];
}
}

- (void)clearAllViews {
NSArray<CKKSKeychainView*>* tempviews = nil;
@synchronized(self.views) {
tempviews = [self.views.allValues copy];
[self.views removeAllObjects];
}

for(CKKSKeychainView* view in tempviews) {
[view cancelAllOperations];
}
}

- (void)clearView:(NSString*) viewName {
CKKSKeychainView* kcv = nil;
@synchronized(self.views) {
kcv = self.views[viewName];
self.views[viewName] = nil;
}

if(kcv) {
[kcv cancelAllOperations];
}
}

- (CKKSKeychainView*)findView:(NSString*)viewName {
if(!viewName) {
return nil;
}
@synchronized(self.views) {
return self.views[viewName];
}
}

- (CKKSKeychainView*)findOrCreateView:(NSString*)viewName {
@synchronized(self.views) {
CKKSKeychainView* kcv = self.views[viewName];
if(kcv) {
return kcv;
}

self.views[viewName] = [[CKKSKeychainView alloc] initWithContainer: self.container
zoneName: viewName
accountTracker: self.accountTracker
lockStateTracker: self.lockStateTracker
reachabilityTracker: self.reachabilityTracker
changeFetcher:self.zoneChangeFetcher
savedTLKNotifier: self.savedTLKNotifier
peerProvider:self
fetchRecordZoneChangesOperationClass: self.fetchRecordZoneChangesOperationClass
fetchRecordsOperationClass: self.fetchRecordsOperationClass
queryOperationClass:self.queryOperationClass
modifySubscriptionsOperationClass: self.modifySubscriptionsOperationClass
modifyRecordZonesOperationClass: self.modifyRecordZonesOperationClass
apsConnectionClass: self.apsConnectionClass
notifierClass: self.notifierClass];

if(self.initializeNewZones) {
[self.views[viewName] initializeZone];
}

return self.views[viewName];
}
}

- (NSDictionary<NSString *,NSString *> *)activeTLKs
{
NSMutableDictionary<NSString *,NSString *> *tlks = [NSMutableDictionary new];
@synchronized(self.views) {
for (NSString *name in self.views) {
CKKSKeychainView *view = self.views[name];
NSString *tlk = view.lastActiveTLKUUID;
if (tlk) {
tlks[name] = tlk;
}
}
}
return tlks;
}

- (CKKSKeychainView*)restartZone:(NSString*)viewName {
@synchronized(self.views) {
[self.views[viewName] halt];
self.views[viewName] = nil;
}
return [self findOrCreateView: viewName];
}

// Allows all views to begin initializing, and opens the floodgates so that new views will be initalized immediately
- (void)initializeZones {
if(!SecCKKSIsEnabled()) {
secnotice("ckks", "Not initializing CKKS view set as CKKS is disabled");
return;
}

@synchronized(self.views) {
self.initializeNewZones = true;

NSSet* viewSet = [self viewList];
for(NSString* s in viewSet) {
[self findOrCreateView:s]; // initializes any newly-created views
}
}

[self setupAnalytics];
}

- (NSString*)viewNameForViewHint: (NSString*) viewHint {
// For now, choose view based on viewhints.
if(viewHint && ![viewHint isEqual: [NSNull null]]) {
return viewHint;
}

// If there isn't a provided view hint, use the "keychain" view if we're testing. Otherwise, nil.
if(SecCKKSTestsEnabled()) {
return @"keychain";
} else {
return nil;
}
}

- (NSString*)viewNameForItem: (SecDbItemRef) item {
CFErrorRef cferror = NULL;
NSString* viewHint = (__bridge NSString*) SecDbItemGetValue(item, &v7vwht, &cferror);

if(cferror) {
secerror("ckks: Couldn't fetch the viewhint for some reason: %@", cferror);
CFReleaseNull(cferror);
viewHint = nil;
}

return [self viewNameForViewHint: viewHint];
}

- (NSString*)viewNameForAttributes: (NSDictionary*) item {
return [self viewNameForViewHint: item[(id)kSecAttrSyncViewHint]];
}

- (void)registerSyncStatusCallback: (NSString*) uuid callback: (SecBoolNSErrorCallback) callback {
// Someone is requesting future notification of this item.
@synchronized(self.pendingSyncCallbacks) {
self.pendingSyncCallbacks[uuid] = callback;
}
}

- (void) handleKeychainEventDbConnection: (SecDbConnectionRef) dbconn source:(SecDbTransactionSource)txionSource added: (SecDbItemRef) added deleted: (SecDbItemRef) deleted {

SecDbItemRef modified = added ? added : deleted;

NSString* viewName = [self viewNameForItem: modified];
NSString* keyViewName = [CKKSKey isItemKeyForKeychainView: modified];

if(keyViewName) {
// This might be some key material for this view! Poke it.
CKKSKeychainView* view = [self findView: keyViewName];

if(!SecCKKSTestDisableKeyNotifications()) {
ckksnotice("ckks", view, "Potential new key material from %@ (source %lu)",
keyViewName, (unsigned long)txionSource);
[view keyStateMachineRequestProcess];
} else {
ckksnotice("ckks", view, "Ignoring potential new key material from %@ (source %lu)",
keyViewName, (unsigned long)txionSource);
}
return;
}

// When SOS is in charge of a view, CKKS is not.
// Since this isn't a CKKS key item, we don't care about it.
if(txionSource == kSecDbSOSTransaction) {
secinfo("ckks", "Ignoring new non-CKKS item in kSecDbSOSTransaction notification");
}

// Looks like a normal item. Proceed!
CKKSKeychainView* view = [self findView:viewName];

NSString* uuid = (__bridge NSString*) SecDbItemGetValue(modified, &v10itemuuid, NULL);
SecBoolNSErrorCallback syncCallback = nil;
if(uuid) {
@synchronized(self.pendingSyncCallbacks) {
syncCallback = self.pendingSyncCallbacks[uuid];
self.pendingSyncCallbacks[uuid] = nil;

if(syncCallback) {
secinfo("ckks", "Have a pending callback for %@; passing along", uuid);
}
}
}

if(!view) {
secinfo("ckks", "No CKKS view for %@, skipping: %@", viewName, modified);
if(syncCallback) {
syncCallback(false, [NSError errorWithDomain:@"securityd"
code:kSOSCCNoSuchView
userInfo:@{NSLocalizedDescriptionKey: [NSString stringWithFormat: @"No syncing view for '%@'", viewName]}]);
}
return;
}

ckksnotice("ckks", view, "Routing item to zone %@: %@", viewName, modified);
[view handleKeychainEventDbConnection: dbconn added:added deleted:deleted rateLimiter:self.globalRateLimiter syncCallback: syncCallback];
}

-(void)setCurrentItemForAccessGroup:(NSData* _Nonnull)newItemPersistentRef
hash:(NSData*)newItemSHA1
accessGroup:(NSString*)accessGroup
identifier:(NSString*)identifier
viewHint:(NSString*)viewHint
replacing:(NSData* _Nullable)oldCurrentItemPersistentRef
hash:(NSData*)oldItemSHA1
complete:(void (^) (NSError* operror)) complete
{
CKKSKeychainView* view = [self findView:viewHint];

if(!view) {
secnotice("ckks", "No CKKS view for %@, skipping current request", viewHint);
complete([NSError errorWithDomain:CKKSErrorDomain
code:CKKSNoSuchView
description:[NSString stringWithFormat: @"No syncing view for view hint '%@'", viewHint]]);
return;
}

[view setCurrentItemForAccessGroup:newItemPersistentRef
hash:newItemSHA1
accessGroup:accessGroup
identifier:identifier
replacing:oldCurrentItemPersistentRef
hash:oldItemSHA1
complete:complete];
}

-(void)getCurrentItemForAccessGroup:(NSString*)accessGroup
identifier:(NSString*)identifier
viewHint:(NSString*)viewHint
fetchCloudValue:(bool)fetchCloudValue
complete:(void (^) (NSString* uuid, NSError* operror)) complete
{
CKKSKeychainView* view = [self findView:viewHint];
if(!view) {
secnotice("ckks", "No CKKS view for %@, skipping current fetch request", viewHint);
complete(NULL, [NSError errorWithDomain:CKKSErrorDomain
code:CKKSNoSuchView
description:[NSString stringWithFormat: @"No view for '%@'", viewHint]]);
return;
}

[view getCurrentItemForAccessGroup:accessGroup
identifier:identifier
fetchCloudValue:fetchCloudValue
complete:complete];
}

+ (instancetype) manager {
return [self resetManager: false setTo: nil];
}

+ (instancetype) resetManager: (bool) reset setTo: (CKKSViewManager*) obj {
static CKKSViewManager* manager = nil;

if([CKDatabase class] == nil) {
secerror("CKKS: CloudKit.framework appears to not be linked. Can't create CKKS objects.");
return nil;
}

if(!manager || reset || obj) {
@synchronized([self class]) {
if(obj != nil) {
[manager clearAllViews];
manager = obj;
} else {
if(reset) {
[manager clearAllViews];
manager = nil;
} else if (manager == nil && SecCKKSIsEnabled()) {
manager = [[CKKSViewManager alloc] initCloudKitWithContainerName:SecCKKSContainerName usePCS:SecCKKSContainerUsePCS];
}
}
}
}

return manager;
}

- (void)cancelPendingOperations {
[self.savedTLKNotifier cancel];
}

-(void)notifyNewTLKsInKeychain {
// Why two functions here? Limitation of OCMock, unfortunately: can't stub and expect the same method
secnotice("ckksbackup", "New TLKs have arrived");
[self syncBackupAndNotifyAboutSync];
}

- (void)syncBackupAndNotifyAboutSync {
SOSAccount* account = (__bridge SOSAccount*)SOSKeychainAccountGetSharedAccount();

if(!account) {
secnotice("ckks", "Failed to get account object");
return;
}

[account performTransaction:^(SOSAccountTransaction * _Nonnull txn) {
CFErrorRef error = NULL;
NSSet* ignore = CFBridgingRelease(SOSAccountCopyBackupPeersAndForceSync(txn, &error));
(void)ignore;

if(error) {
secerror("ckksbackup: Couldn't process sync with backup peers: %@", error);
} else {
secnotice("ckksbackup", "telling CloudServices about TLK arrival");
notify_post(kSecItemBackupNotification);
};
}];
}

#pragma mark - RPCs to manage and report state

- (void)performanceCounters:(void(^)(NSDictionary <NSString *, NSNumber *> *counter))reply {
reply(@{});
}

- (NSArray<CKKSKeychainView*>*)views:(NSString*)viewName operation:(NSString*)opName error:(NSError**)error
{
NSArray* actualViews = nil;

// Ensure we've actually set up, but don't wait too long. Clients get impatient.
if([self.completedSecCKKSInitialize wait:5*NSEC_PER_SEC]) {
secerror("ckks: Haven't yet initialized zones; expect failure fetching views");
}

@synchronized(self.views) {
if(viewName) {
CKKSKeychainView* view = self.views[viewName];
secnotice("ckks", "Received a %@ request for zone %@ (%@)", opName, viewName, view);

if(!view) {
if(error) {
*error = [NSError errorWithDomain:CKKSErrorDomain
code:CKKSNoSuchView
userInfo:@{NSLocalizedDescriptionKey: [NSString stringWithFormat: @"No view for '%@'", viewName]}];
}
return nil;
}

actualViews = @[view];
} else {
actualViews = [self.views.allValues copy];
secnotice("ckks", "Received a %@ request for all zones: %@", opName, actualViews);
}
}
actualViews = [actualViews sortedArrayUsingDescriptors:@[[NSSortDescriptor sortDescriptorWithKey:@"zoneName" ascending:YES]]];
return actualViews;
}

- (void)rpcResetLocal:(NSString*)viewName reply: (void(^)(NSError* result)) reply {
NSError* localError = nil;
NSArray* actualViews = [self views:viewName operation:@"local reset" error:&localError];
if(localError) {
secerror("ckks: Error getting view %@: %@", viewName, localError);
reply(localError);
return;
}

CKKSResultOperation* op = [CKKSResultOperation named:@"local-reset-zones-waiter" withBlockTakingSelf:^(CKKSResultOperation * _Nonnull strongOp) {
if(!strongOp.error) {
secnotice("ckksreset", "Completed rpcResetLocal");
} else {
secnotice("ckks", "Completed rpcResetLocal with error: %@", strongOp.error);
}
reply(CKXPCSuitableError(strongOp.error));
}];

for(CKKSKeychainView* view in actualViews) {
ckksnotice("ckksreset", view, "Beginning local reset for %@", view);
[op addSuccessDependency:[view resetLocalData]];
}

[op timeout:120*NSEC_PER_SEC];
[self.operationQueue addOperation: op];
}

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-implementations"
- (void)rpcResetCloudKit:(NSString*)viewName reply: (void(^)(NSError* result)) reply {
[self rpcResetCloudKit:viewName reason:@"unknown" reply:reply];
}
#pragma clang diagnostic pop

- (void)rpcResetCloudKit:(NSString*)viewName reason:(NSString *)reason reply:(void(^)(NSError* result)) reply {
NSError* localError = nil;
NSArray* actualViews = [self views:viewName operation:@"CloudKit reset" error:&localError];
if(localError) {
secerror("ckks: Error getting view %@: %@", viewName, localError);
reply(localError);
return;
}

CKKSResultOperation* op = [CKKSResultOperation named:@"cloudkit-reset-zones-waiter" withBlockTakingSelf:^(CKKSResultOperation * _Nonnull strongOp) {
if(!strongOp.error) {
secnotice("ckksreset", "Completed rpcResetCloudKit");
} else {
secnotice("ckksreset", "Completed rpcResetCloudKit with error: %@", strongOp.error);
}
reply(CKXPCSuitableError(strongOp.error));
}];

for(CKKSKeychainView* view in actualViews) {
NSString *operationGroupName = [NSString stringWithFormat:@"api-reset-%@", reason];
ckksnotice("ckksreset", view, "Beginning CloudKit reset for %@: %@", view, reason);
[op addSuccessDependency:[view resetCloudKitZone:[CKOperationGroup CKKSGroupWithName:operationGroupName]]];
}

[op timeout:120*NSEC_PER_SEC];
[self.operationQueue addOperation: op];
}

- (void)rpcResync:(NSString*)viewName reply: (void(^)(NSError* result)) reply {
NSError* localError = nil;
NSArray* actualViews = [self views:viewName operation:@"CloudKit resync" error:&localError];
if(localError) {
secerror("ckks: Error getting view %@: %@", viewName, localError);
reply(localError);
return;
}

CKKSResultOperation* op = [[CKKSResultOperation alloc] init];
op.name = @"rpc-resync-cloudkit";
__weak __typeof(op) weakOp = op;
[op addExecutionBlock:^{
__strong __typeof(op) strongOp = weakOp;
secnotice("ckks", "Ending rsync-CloudKit rpc with %@", strongOp.error);
}];

for(CKKSKeychainView* view in actualViews) {
ckksnotice("ckksresync", view, "Beginning resync (CloudKit) for %@", view);

CKKSSynchronizeOperation* resyncOp = [view resyncWithCloud];
[op addSuccessDependency:resyncOp];
}

[op timeout:120*NSEC_PER_SEC];
[self.operationQueue addOperation:op];
[op waitUntilFinished];
reply(CKXPCSuitableError(op.error));
}

- (void)rpcResyncLocal:(NSString*)viewName reply:(void(^)(NSError* result))reply {
NSError* localError = nil;
NSArray* actualViews = [self views:viewName operation:@"local resync" error:&localError];
if(localError) {
secerror("ckks: Error getting view %@: %@", viewName, localError);
reply(localError);
return;
}

CKKSResultOperation* op = [[CKKSResultOperation alloc] init];
op.name = @"rpc-resync-local";
__weak __typeof(op) weakOp = op;
[op addExecutionBlock:^{
__strong __typeof(op) strongOp = weakOp;
secnotice("ckks", "Ending rsync-local rpc with %@", strongOp.error);
reply(CKXPCSuitableError(strongOp.error));
}];

for(CKKSKeychainView* view in actualViews) {
ckksnotice("ckksresync", view, "Beginning resync (local) for %@", view);

CKKSLocalSynchronizeOperation* resyncOp = [view resyncLocal];
[op addSuccessDependency:resyncOp];
}

[op timeout:120*NSEC_PER_SEC];
}

- (void)rpcStatus: (NSString*)viewName
global:(bool)reportGlobal
reply:(void(^)(NSArray<NSDictionary*>* result, NSError* error)) reply
viewBlock:(NSDictionary * (^)(CKKSKeychainView* view))viewBlock
{
NSMutableArray* a = [[NSMutableArray alloc] init];

// Now, query the views about their status
NSError* error = nil;
NSArray* actualViews = [self views:viewName operation:@"status" error:&error];
if(!actualViews || error) {
reply(nil, error);
return;
}

__weak __typeof(self) weakSelf = self;
CKKSResultOperation* statusOp = [CKKSResultOperation named:@"status-rpc" withBlock:^{
__strong __typeof(self) strongSelf = weakSelf;

if (reportGlobal) {
// The first element is always the current global state (non-view-specific)
NSError* selfPeersError = nil;
CKKSSelves* selves = [strongSelf fetchSelfPeers:&selfPeersError];
NSError* trustedPeersError = nil;
NSSet<id<CKKSPeer>>* peers = [strongSelf fetchTrustedPeers:&trustedPeersError];

// Get account state, even wait for it a little
[self.accountTracker.ckdeviceIDInitialized wait:1*NSEC_PER_SEC];
NSString *deviceID = self.accountTracker.ckdeviceID;
NSError *deviceIDError = self.accountTracker.ckdeviceIDError;

NSMutableArray<NSString*>* mutTrustedPeers = [[NSMutableArray alloc] init];
[peers enumerateObjectsUsingBlock:^(id<CKKSPeer> _Nonnull obj, BOOL * _Nonnull stop) {
[mutTrustedPeers addObject: [obj description]];
}];

#define stringify(obj) CKKSNilToNSNull([obj description])
NSDictionary* global = @{
@"view": @"global",
@"selfPeers": stringify(selves),
@"selfPeersError": CKKSNilToNSNull(selfPeersError),
@"trustedPeers": CKKSNilToNSNull(mutTrustedPeers),
@"trustedPeersError": CKKSNilToNSNull(trustedPeersError),
@"reachability": strongSelf.reachabilityTracker.currentReachability ? @"network" : @"no-network",
@"ckdeviceID": CKKSNilToNSNull(deviceID),
@"ckdeviceIDError": CKKSNilToNSNull(deviceIDError),
};
[a addObject: global];
}

for(CKKSKeychainView* view in actualViews) {
ckksnotice("ckks", view, "Fetching status for %@", view.zoneName);
NSDictionary* status = viewBlock(view);
ckksinfo("ckks", view, "Status is %@", status);
if(status) {
[a addObject: status];
}
}
reply(a, nil);
}];

// If we're signed in, give the views a few seconds to enter what they consider to be a non-transient state (in case this daemon just launched)
if([self.accountTracker.currentComputedAccountStatusValid wait:5*NSEC_PER_SEC]) {
secerror("ckks status: Haven't yet figured out login state");
}

if(self.accountTracker.currentComputedAccountStatus == CKKSAccountStatusAvailable) {
CKKSResultOperation* blockOp = [CKKSResultOperation named:@"wait-for-status" withBlock:^{}];
[blockOp timeout:8*NSEC_PER_SEC];
for(CKKSKeychainView* view in actualViews) {
[blockOp addNullableDependency:view.keyStateNonTransientDependency];
[statusOp addDependency:blockOp];
}
[self.operationQueue addOperation:blockOp];
}
[self.operationQueue addOperation:statusOp];

return;
}

- (void)rpcStatus:(NSString*)viewName reply:(void (^)(NSArray<NSDictionary*>* result, NSError* error))reply
{
[self rpcStatus:viewName global:true reply:reply viewBlock:^NSDictionary *(CKKSKeychainView *view) {
return [view status];
}];
}

- (void)rpcFastStatus:(NSString*)viewName reply:(void (^)(NSArray<NSDictionary*>* result, NSError* error))reply
{
[self rpcStatus:viewName global:false reply:reply viewBlock:^NSDictionary *(CKKSKeychainView *view) {
return [view fastStatus];
}];
}

- (void)rpcFetchAndProcessChanges:(NSString*)viewName reply: (void(^)(NSError* result))reply {
[self rpcFetchAndProcessChanges:viewName classA:false reply: (void(^)(NSError* result))reply];
}

- (void)rpcFetchAndProcessClassAChanges:(NSString*)viewName reply: (void(^)(NSError* result))reply {
[self rpcFetchAndProcessChanges:viewName classA:true reply:(void(^)(NSError* result))reply];
}

- (void)rpcFetchAndProcessChanges:(NSString*)viewName classA:(bool)classAError reply: (void(^)(NSError* result)) reply {
NSError* error = nil;
NSArray* actualViews = [self views:viewName operation:@"fetch" error:&error];
if(!actualViews || error) {
reply(error);
return;
}

CKKSResultOperation* blockOp = [[CKKSResultOperation alloc] init];
blockOp.name = @"rpc-fetch-and-process-result";
__weak __typeof(blockOp) weakBlockOp = blockOp;
// Use the completion block instead of the operation block, so that it runs even if the cancel fires
[blockOp setCompletionBlock:^{
__strong __typeof(blockOp) strongBlockOp = weakBlockOp;
[strongBlockOp allDependentsSuccessful];
reply(CKXPCSuitableError(strongBlockOp.error));
}];

for(CKKSKeychainView* view in actualViews) {
ckksnotice("ckks", view, "Beginning fetch for %@", view);

CKKSResultOperation* op = [view processIncomingQueue:classAError after:[view.zoneChangeFetcher requestSuccessfulFetch: CKKSFetchBecauseAPIFetchRequest]];
[blockOp addDependency:op];
}

[self.operationQueue addOperation: [blockOp timeout:(SecCKKSTestsEnabled() ? NSEC_PER_SEC * 5 : NSEC_PER_SEC * 120)]];
}

- (void)rpcPushOutgoingChanges:(NSString*)viewName reply: (void(^)(NSError* result))reply {
NSError* error = nil;
NSArray* actualViews = [self views:viewName operation:@"push" error:&error];
if(!actualViews || error) {
reply(error);
return;
}

CKKSResultOperation* blockOp = [[CKKSResultOperation alloc] init];
blockOp.name = @"rpc-push";
__weak __typeof(blockOp) weakBlockOp = blockOp;
// Use the completion block instead of the operation block, so that it runs even if the cancel fires
[blockOp setCompletionBlock:^{
__strong __typeof(blockOp) strongBlockOp = weakBlockOp;
[strongBlockOp allDependentsSuccessful];
reply(CKXPCSuitableError(strongBlockOp.error));
}];

for(CKKSKeychainView* view in actualViews) {
ckksnotice("ckks-rpc", view, "Beginning push for %@", view);

CKKSResultOperation* op = [view processOutgoingQueue: [CKOperationGroup CKKSGroupWithName:@"rpc-push"]];
[blockOp addDependency:op];
}

[self.operationQueue addOperation: [blockOp timeout:(SecCKKSTestsEnabled() ? NSEC_PER_SEC * 2 : NSEC_PER_SEC * 120)]];
}

- (void)rpcGetCKDeviceIDWithReply:(void (^)(NSString *))reply {
reply(self.accountTracker.ckdeviceID);
}

-(void)xpc24HrNotification {
// XPC has poked us and said we should do some cleanup!

// For now, poke the views and tell them to update their device states if they'd like
NSArray* actualViews = nil;
@synchronized(self.views) {
// Can't safely iterate a mutable collection, so copy it.
actualViews = self.views.allValues;
}

secnotice("ckks", "Received a 24hr notification from XPC");
CKOperationGroup* group = [CKOperationGroup CKKSGroupWithName:@"periodic-device-state-update"];
for(CKKSKeychainView* view in actualViews) {
ckksnotice("ckks", view, "Starting device state XPC update");
// Let the update know it should rate-limit itself
[view updateDeviceState:true waitForKeyHierarchyInitialization:30*NSEC_PER_SEC ckoperationGroup:group];
}
}

- (NSArray<NSDictionary *> * _Nullable)loadRestoredBottledKeysOfType:(OctagonKeyType)keyType error:(NSError**)error
{
CFTypeRef result = NULL;
NSMutableArray* bottledPeerKeychainItems = nil;

NSDictionary* query = @{
(id)kSecClass : (id)kSecClassInternetPassword,
(id)kSecAttrAccessible: (id)kSecAttrAccessibleWhenUnlocked,
(id)kSecAttrNoLegacy : @YES,
(id)kSecAttrType : [[NSNumber alloc]initWithInt: keyType],
(id)kSecAttrServer : (keyType == 1) ? @"Octagon Signing Key" : @"Octagon Encryption Key",
(id)kSecAttrAccessGroup: @"com.apple.security.ckks",
(id)kSecMatchLimit : (id)kSecMatchLimitAll,
(id)kSecReturnAttributes: @YES,
(id)kSecReturnData: @YES,
};
OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef)query, &result);

if(status == errSecSuccess && result && isArray(result)) {
bottledPeerKeychainItems = CFBridgingRelease(result);
result = NULL;
} else {
if(error) {
*error = [NSError errorWithDomain:NSOSStatusErrorDomain
code:status
description:@"could not load bottled peer keys"];
}
CFReleaseNull(result);
}

return bottledPeerKeychainItems;
}

-(NSDictionary *) keychainItemForPeerID:(NSString*)neededPeerID
keychainItems:(NSArray<NSDictionary*> *)keychainItems
escrowSigningPubKeyHash:(NSString *)hashWeNeedToMatch
{
NSDictionary* peerItem = nil;

for(NSDictionary* item in keychainItems){
if(item && [item count] > 0){
NSString* peerIDFromItem = [item objectForKey:(id)kSecAttrAccount];
NSString* hashToConsider = [item objectForKey:(id)kSecAttrLabel];
if([peerIDFromItem isEqualToString:neededPeerID] &&
[hashWeNeedToMatch isEqualToString:hashToConsider])
{
peerItem = [item copy];
break;
}
}
}

return peerItem;
}

- (NSSet<id<CKKSSelfPeer>>*)pastSelves:(NSError**)error
{
NSError* localError = nil;

// get bottled peer identities from the keychain
NSMutableSet<id<CKKSSelfPeer>>* allSelves = [NSMutableSet set];
NSArray<NSDictionary*>* signingKeys = [self loadRestoredBottledKeysOfType:OctagonSigningKey error:&localError];
if(!signingKeys) {
// Item not found isn't actually an error here
if(error && !(localError && [localError.domain isEqualToString: NSOSStatusErrorDomain] && localError.code == errSecItemNotFound)) {
*error = localError;
}

return allSelves;
}

NSArray<NSDictionary*>* encryptionKeys = [self loadRestoredBottledKeysOfType:OctagonEncryptionKey error:&localError];
if(!encryptionKeys) {
if(error && !(localError && [localError.domain isEqualToString: NSOSStatusErrorDomain] && localError.code == errSecItemNotFound)) {
*error = localError;
}
return allSelves;
}

for(NSDictionary* signingKey in signingKeys) {
NSError* peerError = nil;
NSString* peerid = signingKey[(id)kSecAttrAccount];
NSString* hash = signingKey[(id)kSecAttrLabel]; // escrow signing pub key hash

//use peer id AND escrow signing public key hash to look up the matching item in encryptionKeys list
NSDictionary* encryptionKeyItem = [self keychainItemForPeerID:peerid keychainItems:encryptionKeys escrowSigningPubKeyHash:hash];
if(!encryptionKeyItem) {
secerror("octagon: no encryption key available to pair with signing key %@,%@", peerid, hash);
continue;
}

NSData* signingKeyData = signingKey[(id)kSecValueData];
if(!signingKeyData) {
secerror("octagon: no signing key data for %@,%@", peerid,hash);
continue;
}

SFECKeyPair* restoredSigningKey = [[SFECKeyPair alloc] initWithData:signingKeyData
specifier:[[SFECKeySpecifier alloc] initWithCurve:SFEllipticCurveNistp384]
error:&peerError];
if(!restoredSigningKey) {
secerror("octagon: couldn't make signing key for %@,%@: %@", peerid, hash, peerError);
continue;
}

NSData* encryptionKeyData = [encryptionKeyItem objectForKey:(id)kSecValueData];
if(!encryptionKeyData) {
secerror("octagon: no encryption key data for %@,%@", peerid,hash);
continue;
}

SFECKeyPair* restoredEncryptionKey = [[SFECKeyPair alloc] initWithData:encryptionKeyData
specifier:[[SFECKeySpecifier alloc] initWithCurve:SFEllipticCurveNistp384]
error:&peerError];
if(!restoredEncryptionKey) {
secerror("octagon: couldn't make encryption key for %@,%@: %@", peerid,hash, peerError);
continue;
}

//create the SOS self peer
CKKSSOSSelfPeer* restoredIdentity = [[CKKSSOSSelfPeer alloc]initWithSOSPeerID:peerid encryptionKey:restoredEncryptionKey signingKey:restoredSigningKey];

if(restoredIdentity){
secnotice("octagon","adding bottled peer identity: %@", restoredIdentity);
[allSelves addObject:restoredIdentity];
} else {
secerror("octagon: could not create restored identity from: %@: %@", peerid, peerError);
}
}
return allSelves;
}

- (id<CKKSSelfPeer> _Nullable)currentSOSSelf:(NSError**)error
{
__block SFECKeyPair* signingPrivateKey = nil;
__block SFECKeyPair* encryptionPrivateKey = nil;

__block NSError* localerror = nil;

// Wait for this to initialize, but don't worry if it isn't.
[self.accountTracker.accountCirclePeerIDInitialized wait:500*NSEC_PER_MSEC];
NSString* peerID = self.accountTracker.accountCirclePeerID;
if(!peerID || self.accountTracker.accountCirclePeerIDError) {
secerror("ckkspeer: Error fetching self peer : %@", self.accountTracker.accountCirclePeerIDError);
if(error) {
*error = self.accountTracker.accountCirclePeerIDError;
}
return nil;
}

SOSCCPerformWithAllOctagonKeys(^(SecKeyRef octagonEncryptionKey, SecKeyRef octagonSigningKey, CFErrorRef cferror) {
if(cferror) {
localerror = (__bridge NSError*)cferror;
return;
}
if (!cferror && octagonEncryptionKey && octagonSigningKey) {
signingPrivateKey = [[SFECKeyPair alloc] initWithSecKey:octagonSigningKey];
encryptionPrivateKey = [[SFECKeyPair alloc] initWithSecKey:octagonEncryptionKey];
} else {
localerror = [NSError errorWithDomain:CKKSErrorDomain
code:CKKSNoPeersAvailable
description:@"Not all SOS peer keys available, but no error returned"];
}
});

if(localerror) {
if(![self.lockStateTracker isLockedError:localerror]) {
secerror("ckkspeer: Error fetching self encryption keys: %@", localerror);
}
if(error) {
*error = localerror;
}
return nil;
}

CKKSSOSSelfPeer* selfPeer = [[CKKSSOSSelfPeer alloc] initWithSOSPeerID:peerID
encryptionKey:encryptionPrivateKey
signingKey:signingPrivateKey];
return selfPeer;
}

#pragma mark - CKKSPeerProvider implementation

- (CKKSSelves*)fetchSelfPeers:(NSError* __autoreleasing *)error {
NSError* localError = nil;

id<CKKSSelfPeer> selfPeer = [self currentSOSSelf:&localError];
if(!selfPeer || localError) {
if(![self.lockStateTracker isLockedError:localError]) {
secerror("ckks: Error fetching current SOS self: %@", localError);
}
if(error) {
*error = localError;
}
return nil;
}

NSSet<id<CKKSSelfPeer>>* allSelves = [self pastSelves:&localError];
if(!allSelves || localError) {
secerror("ckks: Error fetching past selves: %@", localError);
if(error) {
*error = localError;
}
return nil;
}

CKKSSelves* selves = [[CKKSSelves alloc] initWithCurrent:selfPeer allSelves:allSelves];
return selves;
}

- (NSSet<id<CKKSPeer>>*)fetchTrustedPeers:(NSError* __autoreleasing *)error {
__block NSMutableSet<id<CKKSPeer>>* peerSet = [NSMutableSet set];

SOSCCPerformWithTrustedPeers(^(CFSetRef sosPeerInfoRefs, CFErrorRef cfTrustedPeersError) {
if(cfTrustedPeersError) {
secerror("ckks: Error fetching trusted peers: %@", cfTrustedPeersError);
if(error) {
*error = (__bridge NSError*)cfTrustedPeersError;
}
}

CFSetForEach(sosPeerInfoRefs, ^(const void* voidPeer) {
CFErrorRef cfPeerError = NULL;
SOSPeerInfoRef sosPeerInfoRef = (SOSPeerInfoRef)voidPeer;

if(!sosPeerInfoRef) {
return;
}

CFStringRef cfpeerID = SOSPeerInfoGetPeerID(sosPeerInfoRef);
SecKeyRef cfOctagonSigningKey = NULL, cfOctagonEncryptionKey = NULL;

cfOctagonSigningKey = SOSPeerInfoCopyOctagonSigningPublicKey(sosPeerInfoRef, &cfPeerError);
if (cfOctagonSigningKey) {
cfOctagonEncryptionKey = SOSPeerInfoCopyOctagonEncryptionPublicKey(sosPeerInfoRef, &cfPeerError);
}

if(cfOctagonSigningKey == NULL || cfOctagonEncryptionKey == NULL) {
// Don't log non-debug for -50; it almost always just means this peer didn't have octagon keys
if(cfPeerError == NULL
|| !(CFEqualSafe(CFErrorGetDomain(cfPeerError), kCFErrorDomainOSStatus) && (CFErrorGetCode(cfPeerError) == errSecParam)))
{
secerror("ckkspeer: error fetching octagon keys for peer: %@ %@", sosPeerInfoRef, cfPeerError);
} else {
secinfo("ckkspeer", "Peer(%@) doesn't have Octagon keys, but this is expected: %@", cfpeerID, cfPeerError);
}
}

// Add all peers to the trust set: old-style SOS peers will just have null keys
SFECPublicKey* signingPublicKey = cfOctagonSigningKey ? [[SFECPublicKey alloc] initWithSecKey:cfOctagonSigningKey] : nil;
SFECPublicKey* encryptionPublicKey = cfOctagonEncryptionKey ? [[SFECPublicKey alloc] initWithSecKey:cfOctagonEncryptionKey] : nil;

CKKSSOSPeer* peer = [[CKKSSOSPeer alloc] initWithSOSPeerID:(__bridge NSString*)cfpeerID
encryptionPublicKey:encryptionPublicKey
signingPublicKey:signingPublicKey];
[peerSet addObject:peer];

CFReleaseNull(cfOctagonSigningKey);
CFReleaseNull(cfOctagonEncryptionKey);
CFReleaseNull(cfPeerError);
});
});

return peerSet;
}

- (void)registerForPeerChangeUpdates:(id<CKKSPeerUpdateListener>)listener {
@synchronized(self.peerChangeListeners) {
bool alreadyRegisteredListener = false;
NSEnumerator *enumerator = [self.peerChangeListeners objectEnumerator];
id<CKKSPeerUpdateListener> value;

while ((value = [enumerator nextObject])) {
// do pointer comparison
alreadyRegisteredListener |= (value == listener);
}

if(listener && !alreadyRegisteredListener) {
NSString* queueName = [NSString stringWithFormat: @"ck-peer-change-%@", listener];

dispatch_queue_t objQueue = dispatch_queue_create([queueName UTF8String], DISPATCH_QUEUE_SERIAL_WITH_AUTORELEASE_POOL);
[self.peerChangeListeners setObject: listener forKey: objQueue];
}
}
}

- (void)iteratePeerListenersOnTheirQueue:(void (^)(id<CKKSPeerUpdateListener>))block {
@synchronized(self.peerChangeListeners) {
NSEnumerator *enumerator = [self.peerChangeListeners keyEnumerator];
dispatch_queue_t dq;

// Queue up the changes for each listener.
while ((dq = [enumerator nextObject])) {
id<CKKSPeerUpdateListener> listener = [self.peerChangeListeners objectForKey: dq];
__weak id<CKKSPeerUpdateListener> weakListener = listener;

if(listener) {
dispatch_async(dq, ^{
__strong id<CKKSPeerUpdateListener> strongListener = weakListener;
block(strongListener);
});
}
}
}
}

- (void)sendSelfPeerChangedUpdate {
[self.completedSecCKKSInitialize wait:5*NSEC_PER_SEC]; // Wait for bringup, but don't worry if this times out

[self iteratePeerListenersOnTheirQueue: ^(id<CKKSPeerUpdateListener> listener) {
[listener selfPeerChanged];
}];
}

- (void)sendTrustedPeerSetChangedUpdate {
[self.completedSecCKKSInitialize wait:5*NSEC_PER_SEC]; // Wait for bringup, but don't worry if this times out

[self iteratePeerListenersOnTheirQueue: ^(id<CKKSPeerUpdateListener> listener) {
[listener trustedPeerSetChanged];
}];
}
#endif // OCTAGON
@end