84 lines
2.7 KiB
Objective-C
84 lines
2.7 KiB
Objective-C
//==============================================================================
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// This file is part of Master Password.
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// Copyright (c) 2011-2017, Maarten Billemont.
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//
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// Master Password is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Master Password is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You can find a copy of the GNU General Public License in the
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// LICENSE file. Alternatively, see <http://www.gnu.org/licenses/>.
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//==============================================================================
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#import "MPAlgorithm.h"
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@interface MPKey()
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@property(nonatomic) MPKeyOrigin origin;
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@property(nonatomic, copy) NSString *fullName;
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@property(nonatomic, copy) NSData *( ^keyResolver )(id<MPAlgorithm>);
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@property(nonatomic, strong) NSCache *keyCache;
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@end
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@implementation MPKey;
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- (instancetype)initForFullName:(NSString *)fullName withMasterPassword:(NSString *)masterPassword {
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return [self initForFullName:fullName withKeyResolver:^NSData *(id<MPAlgorithm> algorithm) {
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return [algorithm keyDataForFullName:self.fullName withMasterPassword:masterPassword];
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} keyOrigin:MPKeyOriginMasterPassword];
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}
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- (instancetype)initForFullName:(NSString *)fullName withKeyResolver:(NSData *( ^ )(id<MPAlgorithm>))keyResolver
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keyOrigin:(MPKeyOrigin)origin {
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if (!(self = [super init]))
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return nil;
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self.keyCache = [NSCache new];
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self.origin = origin;
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self.fullName = fullName;
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self.keyResolver = keyResolver;
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return self;
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}
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- (NSData *)keyIDForAlgorithm:(id<MPAlgorithm>)algorithm {
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return [algorithm keyIDForKey:[self keyForAlgorithm:algorithm]];
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}
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- (MPMasterKey)keyForAlgorithm:(id<MPAlgorithm>)algorithm {
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@synchronized (self) {
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NSData *keyData = [self.keyCache objectForKey:algorithm];
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if (!keyData) {
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keyData = self.keyResolver( algorithm );
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if (keyData)
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[self.keyCache setObject:keyData forKey:algorithm];
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}
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return keyData.length == MPMasterKeySize? keyData.bytes: NULL;
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}
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}
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- (BOOL)isEqualToKey:(MPKey *)key {
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return [[self keyIDForAlgorithm:MPAlgorithmDefault] isEqualToData:[key keyIDForAlgorithm:MPAlgorithmDefault]];
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}
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- (BOOL)isEqual:(id)object {
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return [object isKindOfClass:[MPKey class]] && [self isEqualToKey:object];
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}
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@end
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