CKKSMemoryKeyCache.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.
* Please see the License for the specific language governing rights and
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* @APPLE_LICENSE_HEADER_END@
*/
#import <Foundation/Foundation.h>
#import "keychain/ckks/CKKS.h"
#import "keychain/ckks/CKKSMemoryKeyCache.h"
#import "keychain/ckks/CKKSCurrentKeyPointer.h"
#if OCTAGON
@interface CKKSMemoryKeyCache ()
@property NSMutableDictionary<NSString*, CKKSKey*>* keyCache;
@end
@implementation CKKSMemoryKeyCache
- (instancetype)init
{
if((self = [super init])) {
_keyCache = [NSMutableDictionary dictionary];
}
return self;
}
- (CKKSKey* _Nullable)loadKeyForUUID:(NSString*)keyUUID zoneID:(CKRecordZoneID*)zoneID error:(NSError**)error
{
CKKSKey* key = self.keyCache[keyUUID];
if(key) {
return key;
}
// Note: returns nil (and empties the cache) if there is an error
key = [CKKSKey loadKeyWithUUID:keyUUID zoneID:zoneID error:error];
self.keyCache[keyUUID] = key;
return key;
}
- (CKKSKey* _Nullable)loadKeyForItem:(CKKSItem*)item error:(NSError**)error
{
return [self loadKeyForUUID:item.parentKeyUUID zoneID:item.zoneID error:error];
}
- (CKKSKey* _Nullable)currentKeyForClass:(CKKSKeyClass*)keyclass
zoneID:(CKRecordZoneID*)zoneID
error:(NSError *__autoreleasing*)error
{
// Load the CurrentKey record, and find the key for it
CKKSCurrentKeyPointer* ckp = [CKKSCurrentKeyPointer fromDatabase:keyclass zoneID:zoneID error:error];
if(!ckp) {
return nil;
}
return [self loadKeyForUUID:ckp.currentKeyUUID zoneID:zoneID error:error];
}
@end
#endif