mirror of
https://github.com/oxen-io/session-ios.git
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224 lines
9.5 KiB
Objective-C
224 lines
9.5 KiB
Objective-C
#import "OWSPrimaryStorage+Loki.h"
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#import "OWSPrimaryStorage+PreKeyStore.h"
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#import "OWSPrimaryStorage+SignedPreKeyStore.h"
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#import "OWSPrimaryStorage+keyFromIntLong.h"
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#import "OWSDevice.h"
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#import "OWSIdentityManager.h"
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#import "NSDate+OWS.h"
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#import "TSAccountManager.h"
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#import "TSPreKeyManager.h"
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#import "YapDatabaseConnection+OWS.h"
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#import "YapDatabaseTransaction+OWS.h"
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#import <AxolotlKit/NSData+keyVersionByte.h>
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#import "NSObject+Casting.h"
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#import <SignalServiceKit/SignalServiceKit-Swift.h>
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@implementation OWSPrimaryStorage (Loki)
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# pragma mark - Convenience
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#define OWSPrimaryStoragePreKeyStoreCollection @"TSStorageManagerPreKeyStoreCollection"
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#define LKPreKeyContactCollection @"LKPreKeyContactCollection"
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- (OWSIdentityManager *)identityManager {
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return OWSIdentityManager.sharedManager;
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}
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- (TSAccountManager *)accountManager {
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return TSAccountManager.sharedInstance;
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}
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# pragma mark - Pre Key for Contact
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- (BOOL)hasPreKeyForContact:(NSString *)pubKey {
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int preKeyId = [self.dbReadWriteConnection intForKey:pubKey inCollection:LKPreKeyContactCollection];
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return preKeyId > 0;
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}
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- (PreKeyRecord *_Nullable)getPreKeyForContact:(NSString *)pubKey transaction:(YapDatabaseReadTransaction *)transaction {
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OWSAssertDebug(pubKey.length > 0);
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int preKeyId = [transaction intForKey:pubKey inCollection:LKPreKeyContactCollection];
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// If we don't have an id then return nil
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if (preKeyId <= 0) { return nil; }
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/// throws_loadPreKey doesn't allow us to pass transaction ;(
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return [transaction preKeyRecordForKey:[self keyFromInt:preKeyId] inCollection:OWSPrimaryStoragePreKeyStoreCollection];
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}
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- (PreKeyRecord *)getOrCreatePreKeyForContact:(NSString *)pubKey {
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OWSAssertDebug(pubKey.length > 0);
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int preKeyId = [self.dbReadWriteConnection intForKey:pubKey inCollection:LKPreKeyContactCollection];
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// If we don't have an id then generate and store a new one
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if (preKeyId <= 0) {
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return [self generateAndStorePreKeyForContact:pubKey];
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}
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// Load the prekey otherwise just generate a new one
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@try {
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return [self throws_loadPreKey:preKeyId];
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} @catch (NSException *exception) {
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return [self generateAndStorePreKeyForContact:pubKey];
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}
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}
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/// Generate prekey for a contact and store it
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- (PreKeyRecord *)generateAndStorePreKeyForContact:(NSString *)pubKey {
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[LKLogger print:[NSString stringWithFormat:@"[Loki] Generating new pre key for: %@.", pubKey]];
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OWSAssertDebug(pubKey.length > 0);
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NSArray<PreKeyRecord *> *records = [self generatePreKeyRecords:1];
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[self storePreKeyRecords:records];
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OWSAssertDebug(records.count > 0);
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PreKeyRecord *record = records.firstObject;
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[self.dbReadWriteConnection setInt:record.Id forKey:pubKey inCollection:LKPreKeyContactCollection];
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return record;
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}
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# pragma mark - Pre Key Bundle
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#define LKPreKeyBundleCollection @"LKPreKeyBundleCollection"
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- (PreKeyBundle *)generatePreKeyBundleForContact:(NSString *)pubKey forceClean:(BOOL)forceClean {
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// Check pre keys to make sure we have them
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[TSPreKeyManager checkPreKeys];
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ECKeyPair *_Nullable keyPair = self.identityManager.identityKeyPair;
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OWSAssertDebug(keyPair);
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// Refresh the signed pre key if needed
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if (self.currentSignedPreKey == nil || forceClean) {
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SignedPreKeyRecord *signedPreKeyRecord = [self generateRandomSignedRecord];
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[signedPreKeyRecord markAsAcceptedByService];
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[self storeSignedPreKey:signedPreKeyRecord.Id signedPreKeyRecord:signedPreKeyRecord];
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[self setCurrentSignedPrekeyId:signedPreKeyRecord.Id];
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[LKLogger print:@"[Loki] Pre keys refreshed successfully."];
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}
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SignedPreKeyRecord *_Nullable signedPreKey = self.currentSignedPreKey;
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if (!signedPreKey) {
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OWSFailDebug(@"Signed pre key is null.");
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}
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PreKeyRecord *preKey = [self getOrCreatePreKeyForContact:pubKey];
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uint32_t registrationId = [self.accountManager getOrGenerateRegistrationId];
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PreKeyBundle *bundle = [[PreKeyBundle alloc] initWithRegistrationId:registrationId
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deviceId:OWSDevicePrimaryDeviceId
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preKeyId:preKey.Id
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preKeyPublic:preKey.keyPair.publicKey.prependKeyType
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signedPreKeyPublic:signedPreKey.keyPair.publicKey.prependKeyType
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signedPreKeyId:signedPreKey.Id
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signedPreKeySignature:signedPreKey.signature
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identityKey:keyPair.publicKey.prependKeyType];
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return bundle;
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}
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- (PreKeyBundle *)generatePreKeyBundleForContact:(NSString *)pubKey {
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NSInteger failureCount = 0;
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BOOL forceClean = NO;
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while (failureCount < 3) {
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@try {
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PreKeyBundle *preKeyBundle = [self generatePreKeyBundleForContact:pubKey forceClean:forceClean];
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if (![Ed25519 throws_verifySignature:preKeyBundle.signedPreKeySignature
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publicKey:preKeyBundle.identityKey.throws_removeKeyType
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data:preKeyBundle.signedPreKeyPublic]) {
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@throw [NSException exceptionWithName:InvalidKeyException reason:@"KeyIsNotValidlySigned" userInfo:nil];
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}
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return preKeyBundle;
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} @catch (NSException *exception) {
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failureCount++;
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forceClean = YES;
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}
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}
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[LKLogger print:[NSString stringWithFormat:@"[Loki] Failed to generate a valid pre key bundle for: %@.", pubKey]];
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return nil;
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}
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- (PreKeyBundle *_Nullable)getPreKeyBundleForContact:(NSString *)pubKey {
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return [self.dbReadConnection preKeyBundleForKey:pubKey inCollection:LKPreKeyBundleCollection];
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}
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- (void)setPreKeyBundle:(PreKeyBundle *)bundle forContact:(NSString *)pubKey transaction:(YapDatabaseReadWriteTransaction *)transaction {
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[transaction setObject:bundle forKey:pubKey inCollection:LKPreKeyBundleCollection];
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[transaction.connection flushTransactionsWithCompletionQueue:dispatch_get_main_queue() completionBlock:^{ }];
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}
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- (void)removePreKeyBundleForContact:(NSString *)pubKey transaction:(YapDatabaseReadWriteTransaction *)transaction {
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[transaction removeObjectForKey:pubKey inCollection:LKPreKeyBundleCollection];
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}
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# pragma mark - Last Message Hash
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#define LKLastMessageHashCollection @"LKLastMessageHashCollection"
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- (NSString *_Nullable)getLastMessageHashForServiceNode:(NSString *)serviceNode transaction:(YapDatabaseReadWriteTransaction *)transaction {
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NSDictionary *_Nullable dict = [transaction objectForKey:serviceNode inCollection:LKLastMessageHashCollection];
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if (!dict) { return nil; }
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NSString *_Nullable hash = dict[@"hash"];
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if (!hash) { return nil; }
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// Check if the hash isn't expired
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uint64_t now = NSDate.ows_millisecondTimeStamp;
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NSNumber *_Nullable expiresAt = dict[@"expiresAt"];
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if (expiresAt && expiresAt.unsignedLongLongValue <= now) {
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// The last message has expired from the storage server
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[self removeLastMessageHashForServiceNode:serviceNode transaction:transaction];
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return nil;
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}
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return hash;
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}
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- (void)setLastMessageHashForServiceNode:(NSString *)serviceNode hash:(NSString *)hash expiresAt:(u_int64_t)expiresAt transaction:(YapDatabaseReadWriteTransaction *)transaction {
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NSDictionary *dict = @{ @"hash" : hash, @"expiresAt": @(expiresAt) };
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[transaction setObject:dict forKey:serviceNode inCollection:LKLastMessageHashCollection];
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}
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- (void)removeLastMessageHashForServiceNode:(NSString *)serviceNode transaction:(YapDatabaseReadWriteTransaction *)transaction {
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[transaction removeObjectForKey:serviceNode inCollection:LKLastMessageHashCollection];
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}
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# pragma mark - Group Chat
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#define LKMessageIDCollection @"LKMessageIDCollection"
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- (void)setIDForMessageWithServerID:(NSUInteger)serverID to:(NSString *)messageID in:(YapDatabaseReadWriteTransaction *)transaction {
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NSString *key = [NSString stringWithFormat:@"%@", @(serverID)];
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[transaction setObject:messageID forKey:key inCollection:LKMessageIDCollection];
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}
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- (NSString *_Nullable)getIDForMessageWithServerID:(NSUInteger)serverID in:(YapDatabaseReadTransaction *)transaction {
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NSString *key = [NSString stringWithFormat:@"%@", @(serverID)];
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return [transaction objectForKey:key inCollection:LKMessageIDCollection];
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}
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- (void)updateMessageIDCollectionByPruningMessagesWithIDs:(NSSet<NSString *> *)targetMessageIDs in:(YapDatabaseReadWriteTransaction *)transaction {
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NSMutableArray<NSString *> *serverIDs = [NSMutableArray new];
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[transaction enumerateRowsInCollection:LKMessageIDCollection usingBlock:^(NSString *key, id object, id metadata, BOOL *stop) {
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if (![object isKindOfClass:NSString.class]) { return; }
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NSString *messageID = (NSString *)object;
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if (![targetMessageIDs containsObject:messageID]) { return; }
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[serverIDs addObject:key];
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}];
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[transaction removeObjectsForKeys:serverIDs inCollection:LKMessageIDCollection];
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}
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# pragma mark - Restoration
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#define LKGeneralCollection @"Loki"
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- (void)setRestorationTime:(NSTimeInterval)time {
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[self.dbReadWriteConnection setDouble:time forKey:@"restoration_time" inCollection:LKGeneralCollection];
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}
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- (NSTimeInterval)getRestorationTime {
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return [self.dbReadConnection doubleForKey:@"restoration_time" inCollection:LKGeneralCollection defaultValue:0];
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}
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@end
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