136 lines
3.8 KiB
Objective-C
136 lines
3.8 KiB
Objective-C
//
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// Copyright 2017 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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//
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#import "TSGroupModel.h"
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#import <SignalServiceKit/SignalServiceKit-Swift.h>
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NS_ASSUME_NONNULL_BEGIN
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const NSUInteger kMaxEncryptedAvatarSize = 3 * 1024 * 1024;
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const NSUInteger kMaxAvatarSize = (kMaxEncryptedAvatarSize
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/* The length of the padding. See GroupSecretParams:encrypt_blob_with_padding in LibSignal. */
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- sizeof(uint32_t)
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/* Overhead from GroupAttributeBlob (protobuf) via GroupV2Params.encryptGroupAvatar(_:). */
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/* One byte for "2:LEN" & 4 bytes to represent more than 2 MiB of data (2^21). */
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- 1
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- 4
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/* The padding bytes themselves. See ClientZkGroupCipher.encryptBlob(randomness:plaintext:). */
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- 0
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/* Encryption tag & nonce. See GroupSecretParams:encrypt_blob in LibSignal. */
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- 16
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- 12
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/* Reserved byte. See GroupSecretParams:encrypt_blob in LibSignal. */
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- 1);
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const NSUInteger kGroupIdLengthV1 = 16;
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const NSUInteger kGroupIdLengthV2 = 32;
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NSUInteger const TSGroupModelSchemaVersion = 2;
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@interface TSGroupModel ()
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@property (nonatomic, readonly) NSUInteger groupModelSchemaVersion;
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@end
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#pragma mark -
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@implementation TSGroupModel
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@synthesize groupName = _groupName;
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#if TARGET_OS_IOS
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- (instancetype)initWithGroupId:(NSData *)groupId
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name:(nullable NSString *)name
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avatarData:(nullable NSData *)avatarData
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members:(NSArray<SignalServiceAddress *> *)members
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addedByAddress:(nullable SignalServiceAddress *)addedByAddress
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{
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self = [super init];
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if (!self) {
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return self;
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}
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_groupId = groupId;
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_groupName = name;
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_groupMembers = members;
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_addedByAddress = addedByAddress;
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_groupModelSchemaVersion = TSGroupModelSchemaVersion;
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if (avatarData) {
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NSError *error;
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[self persistAvatarData:avatarData error:&error];
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if (error) {
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OWSFailDebug(@"Failed to persist group avatar data %@", error);
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}
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}
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OWSAssertDebug([GroupManager isValidGroupId:groupId groupsVersion:self.groupsVersion]);
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return self;
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}
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wobjc-designated-initializers"
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- (nullable instancetype)initWithCoder:(NSCoder *)coder
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{
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self = [super initWithCoder:coder];
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#pragma clang diagnostic pop
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if (!self) {
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return self;
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}
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OWSAssertDebug([GroupManager isValidGroupId:self.groupId groupsVersion:self.groupsVersion]);
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if (_groupModelSchemaVersion < 1) {
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NSArray<NSString *> *_Nullable memberE164s = [coder decodeObjectForKey:@"groupMemberIds"];
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if (memberE164s) {
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NSMutableArray<SignalServiceAddress *> *memberAddresses = [NSMutableArray new];
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for (NSString *phoneNumber in memberE164s) {
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[memberAddresses addObject:[SignalServiceAddress legacyAddressWithServiceIdString:nil
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phoneNumber:phoneNumber]];
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}
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_groupMembers = [memberAddresses copy];
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} else {
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_groupMembers = @[];
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}
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}
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if (_groupModelSchemaVersion < 2) {
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_legacyAvatarData = [coder decodeObjectForKey:@"groupAvatarData"];
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}
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_groupModelSchemaVersion = TSGroupModelSchemaVersion;
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return self;
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}
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- (GroupsVersion)groupsVersion
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{
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return GroupsVersionV1;
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}
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- (GroupMembership *)groupMembership
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{
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return [[GroupMembership alloc] initWithV1Members:self.groupMembers];
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}
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#endif
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- (nullable NSString *)groupName
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{
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return _groupName.filterStringForDisplay;
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}
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- (NSString *)groupNameOrDefault
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{
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NSString *_Nullable groupName = [self.groupName filterStringForDisplay];
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return groupName.length > 0 ? groupName : TSGroupThread.defaultGroupName;
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}
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@end
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NS_ASSUME_NONNULL_END
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