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83 lines
2.4 KiB
Objective-C
83 lines
2.4 KiB
Objective-C
//
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// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
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//
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#import "SignalKeyingStorage.h"
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#import <SignalCoreKit/Randomness.h>
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#import <SignalServiceKit/OWSPrimaryStorage.h>
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#import <SignalServiceKit/YapDatabaseConnection+OWS.h>
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#define SignalKeyingCollection @"SignalKeyingCollection"
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#define SIGNALING_MAC_KEY_LENGTH 20
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#define SIGNALING_CIPHER_KEY_LENGTH 16
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#define SIGNALING_EXTRA_KEY_LENGTH 4
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@implementation SignalKeyingStorage
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+ (void)generateSignaling
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{
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[self storeData:[Randomness generateRandomBytes:SIGNALING_MAC_KEY_LENGTH] forKey:SIGNALING_MAC_KEY];
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[self storeData:[Randomness generateRandomBytes:SIGNALING_CIPHER_KEY_LENGTH] forKey:SIGNALING_CIPHER_KEY];
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[self storeData:[Randomness generateRandomBytes:SIGNALING_EXTRA_KEY_LENGTH] forKey:SIGNALING_EXTRA_KEY];
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}
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+ (int64_t)getAndIncrementOneTimeCounter
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{
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__block int64_t oldCounter;
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oldCounter = [[self stringForKey:PASSWORD_COUNTER_KEY] longLongValue];
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int64_t newCounter = (oldCounter == INT64_MAX) ? INT64_MIN : (oldCounter + 1);
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[self storeString:[@(newCounter) stringValue] forKey:PASSWORD_COUNTER_KEY];
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return newCounter;
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}
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+ (NSData *)signalingCipherKey
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{
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return [self dataForKey:SIGNALING_CIPHER_KEY andVerifyLength:SIGNALING_CIPHER_KEY_LENGTH];
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}
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+ (NSData *)signalingMacKey
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{
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return [self dataForKey:SIGNALING_MAC_KEY andVerifyLength:SIGNALING_MAC_KEY_LENGTH];
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}
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+ (NSData *)signalingExtraKey
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{
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return [self dataForKey:SIGNALING_EXTRA_KEY andVerifyLength:SIGNALING_EXTRA_KEY_LENGTH];
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}
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#pragma mark Keychain wrapper methods
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+ (void)storeData:(NSData *)data forKey:(NSString *)key
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{
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[OWSPrimaryStorage.dbReadWriteConnection setObject:data forKey:key inCollection:SignalKeyingCollection];
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}
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+ (NSData *)dataForKey:(NSString *)key andVerifyLength:(uint)length
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{
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NSData *data = [self dataForKey:key];
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if (data.length != length) {
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OWSLogError(@"Length of data not matching. Got %lu, expected %u", (unsigned long)data.length, length);
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}
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return data;
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}
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+ (NSData *)dataForKey:(NSString *)key
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{
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return [OWSPrimaryStorage.dbReadConnection dataForKey:key inCollection:SignalKeyingCollection];
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}
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+ (NSString *)stringForKey:(NSString *)key
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{
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return [OWSPrimaryStorage.dbReadConnection stringForKey:key inCollection:SignalKeyingCollection];
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}
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+ (void)storeString:(NSString *)string forKey:(NSString *)key
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{
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[OWSPrimaryStorage.dbReadWriteConnection setObject:string forKey:key inCollection:SignalKeyingCollection];
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}
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@end
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