747 lines
28 KiB
Objective-C
747 lines
28 KiB
Objective-C
//
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// Copyright (c) 2019 Open Whisper Systems. All rights reserved.
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//
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#import "OWSProfileManager.h"
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#import "Environment.h"
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#import "OWSUserProfile.h"
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#import <PromiseKit/AnyPromise.h>
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#import <SignalUtilitiesKit/SignalUtilitiesKit-Swift.h>
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#import "UIUtil.h"
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#import <SessionUtilitiesKit/AppContext.h>
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#import <SessionMessagingKit/AppReadiness.h>
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#import <SessionUtilitiesKit/MIMETypeUtil.h>
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#import <SessionUtilitiesKit/NSData+Image.h>
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#import <SessionUtilitiesKit/NSNotificationCenter+OWS.h>
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#import <SessionUtilitiesKit/NSString+SSK.h>
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#import <SessionMessagingKit/OWSBlockingManager.h>
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#import <SessionUtilitiesKit/OWSFileSystem.h>
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#import <SignalUtilitiesKit/OWSPrimaryStorage+Loki.h>
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#import <SessionMessagingKit/SSKEnvironment.h>
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#import <SessionMessagingKit/TSAccountManager.h>
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#import <SessionMessagingKit/TSGroupThread.h>
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#import <SessionMessagingKit/TSThread.h>
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#import <SessionUtilitiesKit/TSYapDatabaseObject.h>
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#import <SessionUtilitiesKit/UIImage+OWS.h>
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#import <SessionMessagingKit/YapDatabaseConnection+OWS.h>
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NS_ASSUME_NONNULL_BEGIN
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NSString *const kNSNotificationName_ProfileWhitelistDidChange = @"kNSNotificationName_ProfileWhitelistDidChange";
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NSString *const kOWSProfileManager_UserWhitelistCollection = @"kOWSProfileManager_UserWhitelistCollection";
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NSString *const kOWSProfileManager_GroupWhitelistCollection = @"kOWSProfileManager_GroupWhitelistCollection";
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NSString *const kNSNotificationName_ProfileKeyDidChange = @"kNSNotificationName_ProfileKeyDidChange";
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// The max bytes for a user's profile name, encoded in UTF8.
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// Before encrypting and submitting we NULL pad the name data to this length.
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const NSUInteger kOWSProfileManager_NameDataLength = 26;
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const NSUInteger kOWSProfileManager_MaxAvatarDiameter = 640;
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typedef void (^ProfileManagerFailureBlock)(NSError *error);
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@interface OWSProfileManager ()
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@property (nonatomic, readonly) YapDatabaseConnection *dbConnection;
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// This property can be accessed on any thread, while synchronized on self.
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@property (atomic, readonly) NSCache<NSString *, UIImage *> *profileAvatarImageCache;
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// This property can be accessed on any thread, while synchronized on self.
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@property (atomic, readonly) NSMutableSet<NSString *> *currentAvatarDownloads;
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@end
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#pragma mark -
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// Access to most state should happen while synchronized on the profile manager.
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// Writes should happen off the main thread, wherever possible.
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@implementation OWSProfileManager
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+ (instancetype)sharedManager
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{
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return SSKEnvironment.shared.profileManager;
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}
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- (instancetype)initWithPrimaryStorage:(OWSPrimaryStorage *)primaryStorage
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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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OWSAssertIsOnMainThread();
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OWSAssertDebug(primaryStorage);
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_dbConnection = primaryStorage.newDatabaseConnection;
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_profileAvatarImageCache = [NSCache new];
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_currentAvatarDownloads = [NSMutableSet new];
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OWSSingletonAssert();
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return self;
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}
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- (void)dealloc
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{
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[[NSNotificationCenter defaultCenter] removeObserver:self];
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}
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#pragma mark - Dependencies
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- (TSAccountManager *)tsAccountManager
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{
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return TSAccountManager.sharedInstance;
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}
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- (OWSIdentityManager *)identityManager
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{
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return SSKEnvironment.shared.identityManager;
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}
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- (OWSBlockingManager *)blockingManager
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{
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return SSKEnvironment.shared.blockingManager;
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}
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- (void)updateLocalProfileName:(nullable NSString *)profileName
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avatarImage:(nullable UIImage *)avatarImage
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success:(void (^)(void))successBlockParameter
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failure:(void (^)(NSError *))failureBlockParameter
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requiresSync:(BOOL)requiresSync
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{
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OWSAssertDebug(successBlockParameter);
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OWSAssertDebug(failureBlockParameter);
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// Ensure that the success and failure blocks are called on the main thread.
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void (^failureBlock)(NSError *) = ^(NSError *error) {
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OWSLogError(@"Updating service with profile failed.");
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dispatch_async(dispatch_get_main_queue(), ^{
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failureBlockParameter(error);
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});
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};
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void (^successBlock)(void) = ^{
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OWSLogInfo(@"Successfully updated service with profile.");
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dispatch_async(dispatch_get_main_queue(), ^{
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successBlockParameter();
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});
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};
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// The final steps are to:
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//
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// * Try to update the service.
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// * Update client state on success.
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void (^tryToUpdateService)(NSString *_Nullable, NSString *_Nullable) = ^(
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NSString *_Nullable avatarUrlPath, NSString *_Nullable avatarFileName) {
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[self updateServiceWithProfileName:profileName
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avatarUrl:avatarUrlPath
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success:^{
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SNContact *userProfile = [LKStorage.shared getUser];
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OWSAssertDebug(userProfile);
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userProfile.name = profileName;
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userProfile.profilePictureURL = avatarUrlPath;
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userProfile.profilePictureFileName = avatarFileName;
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[LKStorage writeWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
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[LKStorage.shared setContact:userProfile usingTransaction:transaction];
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} completion:^{
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if (avatarFileName != nil) {
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[self updateProfileAvatarCache:avatarImage filename:avatarFileName];
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}
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successBlock();
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}];
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}
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failure:^(NSError *error) {
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failureBlock(error);
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}];
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};
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SNContact *userProfile = [LKStorage.shared getUser];
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OWSAssertDebug(userProfile);
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if (avatarImage) {
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// If we have a new avatar image, we must first:
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//
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// * Encode it to JPEG.
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// * Write it to disk.
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// * Encrypt it
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// * Upload it to asset service
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// * Send asset service info to Signal Service
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OWSLogVerbose(@"Updating local profile on service with new avatar.");
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[self writeAvatarToDisk:avatarImage
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success:^(NSData *data, NSString *fileName) {
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[self uploadAvatarToService:data
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success:^(NSString *_Nullable avatarUrlPath) {
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tryToUpdateService(avatarUrlPath, fileName);
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}
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failure:^(NSError *error) {
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failureBlock(error);
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}];
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}
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failure:^(NSError *error) {
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failureBlock(error);
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}];
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} else if (userProfile.profilePictureURL) {
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OWSLogVerbose(@"Updating local profile on service with cleared avatar.");
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[self uploadAvatarToService:nil
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success:^(NSString *_Nullable avatarUrlPath) {
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tryToUpdateService(nil, nil);
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}
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failure:^(NSError *error) {
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failureBlock(error);
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}];
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} else {
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OWSLogVerbose(@"Updating local profile on service with no avatar.");
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tryToUpdateService(nil, nil);
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}
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}
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- (void)writeAvatarToDisk:(UIImage *)avatar
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success:(void (^)(NSData *data, NSString *fileName))successBlock
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failure:(ProfileManagerFailureBlock)failureBlock {
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OWSAssertDebug(avatar);
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OWSAssertDebug(successBlock);
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OWSAssertDebug(failureBlock);
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dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
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if (avatar) {
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NSData *data = [self processedImageDataForRawAvatar:avatar];
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OWSAssertDebug(data);
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if (data) {
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NSString *fileName = [self generateAvatarFilename];
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NSString *filePath = [OWSUserProfile profileAvatarFilepathWithFilename:fileName];
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BOOL success = [data writeToFile:filePath atomically:YES];
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OWSAssertDebug(success);
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if (success) {
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return successBlock(data, fileName);
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}
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}
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}
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failureBlock(OWSErrorWithCodeDescription(OWSErrorCodeAvatarWriteFailed, @"Avatar write failed."));
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});
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}
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- (NSData *)processedImageDataForRawAvatar:(UIImage *)image
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{
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NSUInteger kMaxAvatarBytes = 5 * 1000 * 1000;
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if (image.size.width != kOWSProfileManager_MaxAvatarDiameter
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|| image.size.height != kOWSProfileManager_MaxAvatarDiameter) {
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// To help ensure the user is being shown the same cropping of their avatar as
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// everyone else will see, we want to be sure that the image was resized before this point.
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OWSFailDebug(@"Avatar image should have been resized before trying to upload");
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image = [image resizedImageToFillPixelSize:CGSizeMake(kOWSProfileManager_MaxAvatarDiameter,
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kOWSProfileManager_MaxAvatarDiameter)];
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}
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NSData *_Nullable data = UIImageJPEGRepresentation(image, 0.95f);
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if (data.length > kMaxAvatarBytes) {
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// Our avatar dimensions are so small that it's incredibly unlikely we wouldn't be able to fit our profile
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// photo. e.g. generating pure noise at our resolution compresses to ~200k.
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OWSFailDebug(@"Suprised to find profile avatar was too large. Was it scaled properly? image: %@", image);
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}
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return data;
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}
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// If avatarData is nil, we are clearing the avatar.
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- (void)uploadAvatarToService:(NSData *_Nullable)avatarData
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success:(void (^)(NSString *_Nullable avatarUrlPath))successBlock
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failure:(ProfileManagerFailureBlock)failureBlock {
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OWSAssertDebug(successBlock);
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OWSAssertDebug(failureBlock);
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OWSAssertDebug(avatarData == nil || avatarData.length > 0);
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dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
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// We always want to encrypt a profile with a new profile key
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// This ensures that other users know that our profile picture was updated
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OWSAES256Key *newProfileKey = [OWSAES256Key generateRandomKey];
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if (avatarData) {
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NSData *encryptedAvatarData = [self encryptProfileData:avatarData profileKey:newProfileKey];
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OWSAssertDebug(encryptedAvatarData.length > 0);
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AnyPromise *promise = [SNFileServerAPIV2 upload:encryptedAvatarData];
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[promise.thenOn(dispatch_get_main_queue(), ^(NSString *fileID) {
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NSString *downloadURL = [NSString stringWithFormat:@"%@/files/%@", SNFileServerAPIV2.server, fileID];
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[NSUserDefaults.standardUserDefaults setObject:[NSDate new] forKey:@"lastProfilePictureUpload"];
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SNContact *user = [LKStorage.shared getUser];
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user.profilePictureEncryptionKey = newProfileKey;
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[LKStorage writeWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
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[LKStorage.shared setContact:user usingTransaction:transaction];
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} completion:^{
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successBlock(downloadURL);
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}];
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})
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.catchOn(dispatch_get_main_queue(), ^(id result) {
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// There appears to be a bug in PromiseKit that sometimes causes catchOn
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// to be invoked with the fulfilled promise's value as the error. The below
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// is a quick and dirty workaround.
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if ([result isKindOfClass:NSString.class]) {
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SNContact *user = [LKStorage.shared getUser];
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user.profilePictureEncryptionKey = newProfileKey;
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[LKStorage writeWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
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[LKStorage.shared setContact:user usingTransaction:transaction];
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} completion:^{
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successBlock(result);
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}];
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} else {
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failureBlock(result);
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}
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}) retainUntilComplete];
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} else {
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// Update our profile key and set the url to nil if avatar data is nil
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SNContact *user = [LKStorage.shared getUser];
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user.profilePictureEncryptionKey = newProfileKey;
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user.profilePictureURL = nil;
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user.profilePictureFileName = nil;
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[LKStorage writeWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
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[LKStorage.shared setContact:user usingTransaction:transaction];
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} completion:^{
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successBlock(nil);
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}];
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}
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});
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}
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- (void)updateServiceWithProfileName:(nullable NSString *)localProfileName
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avatarUrl:(nullable NSString *)avatarURL
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success:(void (^)(void))successBlock
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failure:(ProfileManagerFailureBlock)failureBlock {
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successBlock();
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}
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- (void)updateServiceWithProfileName:(nullable NSString *)localProfileName avatarURL:(nullable NSString *)avatarURL {
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[self updateServiceWithProfileName:localProfileName avatarUrl:avatarURL success:^{} failure:^(NSError * _Nonnull error) {}];
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}
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#pragma mark - Profile Key Rotation
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- (nullable NSString *)groupKeyForGroupId:(NSData *)groupId {
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NSString *groupIdKey = [groupId hexadecimalString];
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return groupIdKey;
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}
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- (nullable NSData *)groupIdForGroupKey:(NSString *)groupKey {
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NSMutableData *groupId = [NSMutableData new];
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if (groupKey.length % 2 != 0) {
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OWSFailDebug(@"Group key has unexpected length: %@ (%lu)", groupKey, (unsigned long)groupKey.length);
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return nil;
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}
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for (NSUInteger i = 0; i + 2 <= groupKey.length; i += 2) {
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NSString *_Nullable byteString = [groupKey substringWithRange:NSMakeRange(i, 2)];
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if (!byteString) {
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OWSFailDebug(@"Couldn't slice group key.");
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return nil;
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}
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unsigned byteValue;
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if (![[NSScanner scannerWithString:byteString] scanHexInt:&byteValue]) {
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OWSFailDebug(@"Couldn't parse hex byte: %@.", byteString);
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return nil;
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}
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if (byteValue > 0xff) {
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OWSFailDebug(@"Invalid hex byte: %@ (%d).", byteString, byteValue);
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return nil;
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}
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uint8_t byte = (uint8_t)(0xff & byteValue);
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[groupId appendBytes:&byte length:1];
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}
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return [groupId copy];
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}
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- (void)regenerateLocalProfile
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{
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NSString *userPublicKey = [SNGeneralUtilities getUserPublicKey];
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SNContact *contact = [LKStorage.shared getContactWithSessionID:userPublicKey];
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contact.profilePictureEncryptionKey = [OWSAES256Key generateRandomKey];
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contact.profilePictureURL = nil;
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contact.profilePictureFileName = nil;
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[LKStorage writeWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
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[LKStorage.shared setContact:contact usingTransaction:transaction];
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} completion:^{
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[[self.tsAccountManager updateAccountAttributes] retainUntilComplete];
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}];
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}
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#pragma mark - Other Users' Profiles
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- (void)setProfileKeyData:(NSData *)profileKeyData forRecipientId:(NSString *)recipientId avatarURL:(nullable NSString *)avatarURL
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{
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dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
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OWSAES256Key *_Nullable profileKey = [OWSAES256Key keyWithData:profileKeyData];
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if (profileKey == nil) {
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OWSFailDebug(@"Failed to make profile key for key data");
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return;
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}
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SNContact *contact = [LKStorage.shared getContactWithSessionID:recipientId];
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OWSAssertDebug(contact);
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if (contact.profilePictureEncryptionKey != nil && [contact.profilePictureEncryptionKey.keyData isEqual:profileKey.keyData]) {
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// Ignore redundant update.
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return;
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}
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contact.profilePictureEncryptionKey = profileKey;
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contact.profilePictureURL = nil;
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contact.profilePictureFileName = nil;
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[LKStorage writeWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
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[LKStorage.shared setContact:contact usingTransaction:transaction];
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} completion:^{
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contact.profilePictureURL = avatarURL;
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[LKStorage writeWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
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[LKStorage.shared setContact:contact usingTransaction:transaction];
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} completion:^{
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[self downloadAvatarForUserProfile:contact];
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}];
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}];
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});
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}
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- (void)setProfileKeyData:(NSData *)profileKeyData forRecipientId:(NSString *)recipientId
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{
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[self setProfileKeyData:profileKeyData forRecipientId:recipientId avatarURL:nil];
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}
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- (nullable NSData *)profileKeyDataForRecipientId:(NSString *)recipientId
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{
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return [self profileKeyForRecipientId:recipientId].keyData;
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}
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- (nullable OWSAES256Key *)profileKeyForRecipientId:(NSString *)recipientId
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{
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OWSAssertDebug(recipientId.length > 0);
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SNContact *contact = [LKStorage.shared getContactWithSessionID:recipientId];
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OWSAssertDebug(contact);
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return contact.profilePictureEncryptionKey;
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}
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- (nullable UIImage *)profileAvatarForRecipientId:(NSString *)recipientId
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{
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OWSAssertDebug(recipientId.length > 0);
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SNContact *contact = [LKStorage.shared getContactWithSessionID:recipientId];
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if (contact.profilePictureFileName != nil && contact.profilePictureFileName.length > 0) {
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return [self loadProfileAvatarWithFilename:contact.profilePictureFileName];
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}
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if (contact.profilePictureURL != nil && contact.profilePictureURL.length > 0) {
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[self downloadAvatarForUserProfile:contact];
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}
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return nil;
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}
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- (nullable NSData *)profileAvatarDataForRecipientId:(NSString *)recipientId
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{
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OWSAssertDebug(recipientId.length > 0);
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SNContact *contact = [LKStorage.shared getContactWithSessionID:recipientId];
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if (contact.profilePictureFileName != nil && contact.profilePictureFileName.length > 0) {
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return [self loadProfileDataWithFilename:contact.profilePictureFileName];
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}
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return nil;
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}
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- (NSString *)generateAvatarFilename
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{
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return [[NSUUID UUID].UUIDString stringByAppendingPathExtension:@"jpg"];
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}
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- (void)downloadAvatarForUserProfile:(SNContact *)contact
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{
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OWSAssertDebug(contact);
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__block OWSBackgroundTask *backgroundTask = [OWSBackgroundTask backgroundTaskWithLabelStr:__PRETTY_FUNCTION__];
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dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
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BOOL hasProfilePictureURL = (contact.profilePictureURL != nil && contact.profilePictureURL.length > 0);
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if (!hasProfilePictureURL) {
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OWSLogDebug(@"Skipping downloading avatar for %@ because url is not set", contact.sessionID);
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return;
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}
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NSString *_Nullable avatarUrlPathAtStart = contact.profilePictureURL;
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BOOL hasProfileEncryptionKey = (contact.profilePictureEncryptionKey != nil && contact.profilePictureEncryptionKey.keyData.length > 0);
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if (!hasProfileEncryptionKey || !hasProfilePictureURL) {
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return;
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}
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OWSAES256Key *profileKeyAtStart = contact.profilePictureEncryptionKey;
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NSString *fileName = [self generateAvatarFilename];
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NSString *filePath = [OWSUserProfile profileAvatarFilepathWithFilename:fileName];
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@synchronized(self.currentAvatarDownloads)
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{
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if ([self.currentAvatarDownloads containsObject:contact.sessionID]) {
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// Download already in flight; ignore.
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return;
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}
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[self.currentAvatarDownloads addObject:contact.sessionID];
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}
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|
|
|
OWSLogVerbose(@"downloading profile avatar: %@", contact.sessionID);
|
|
|
|
NSString *profilePictureURL = contact.profilePictureURL;
|
|
|
|
NSString *file = [profilePictureURL lastPathComponent];
|
|
BOOL useOldServer = [profilePictureURL containsString:SNFileServerAPIV2.oldServer];
|
|
AnyPromise *promise = [SNFileServerAPIV2 download:file useOldServer:useOldServer];
|
|
|
|
[promise.then(^(NSData *data) {
|
|
@synchronized(self.currentAvatarDownloads)
|
|
{
|
|
[self.currentAvatarDownloads removeObject:contact.sessionID];
|
|
}
|
|
NSData *_Nullable encryptedData = data;
|
|
NSData *_Nullable decryptedData = [self decryptProfileData:encryptedData profileKey:profileKeyAtStart];
|
|
UIImage *_Nullable image = nil;
|
|
if (decryptedData) {
|
|
BOOL success = [decryptedData writeToFile:filePath atomically:YES];
|
|
if (success) {
|
|
image = [UIImage imageWithContentsOfFile:filePath];
|
|
}
|
|
}
|
|
|
|
SNContact *latestContact = [LKStorage.shared getContactWithSessionID:contact.sessionID];
|
|
|
|
BOOL hasProfileEncryptionKey = (latestContact.profilePictureEncryptionKey != nil
|
|
&& latestContact.profilePictureEncryptionKey.keyData.length > 0);
|
|
if (!hasProfileEncryptionKey || ![latestContact.profilePictureEncryptionKey isEqual:contact.profilePictureEncryptionKey]) {
|
|
OWSLogWarn(@"Ignoring avatar download for obsolete user profile.");
|
|
} else if (![avatarUrlPathAtStart isEqualToString:latestContact.profilePictureURL]) {
|
|
OWSLogInfo(@"avatar url has changed during download");
|
|
if (latestContact.profilePictureURL != nil && latestContact.profilePictureURL.length > 0) {
|
|
[self downloadAvatarForUserProfile:latestContact];
|
|
}
|
|
} else if (!encryptedData) {
|
|
OWSLogError(@"avatar encrypted data for %@ could not be read.", contact.sessionID);
|
|
} else if (!decryptedData) {
|
|
OWSLogError(@"avatar data for %@ could not be decrypted.", contact.sessionID);
|
|
} else if (!image) {
|
|
OWSLogError(@"avatar image for %@ could not be loaded.", contact.sessionID);
|
|
} else {
|
|
latestContact.profilePictureFileName = fileName;
|
|
[LKStorage writeWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
|
|
[LKStorage.shared setContact:latestContact usingTransaction:transaction];
|
|
}];
|
|
[self updateProfileAvatarCache:image filename:fileName];
|
|
}
|
|
|
|
OWSAssertDebug(backgroundTask);
|
|
backgroundTask = nil;
|
|
}) retainUntilComplete];
|
|
});
|
|
}
|
|
|
|
- (void)updateProfileForRecipientId:(NSString *)recipientId
|
|
profileNameEncrypted:(nullable NSData *)profileNameEncrypted
|
|
avatarUrlPath:(nullable NSString *)avatarUrlPath
|
|
{
|
|
OWSAssertDebug(recipientId.length > 0);
|
|
|
|
OWSLogDebug(@"update profile for: %@ name: %@ avatar: %@", recipientId, profileNameEncrypted, avatarUrlPath);
|
|
|
|
// Ensure decryption, etc. off main thread.
|
|
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
|
|
SNContact *contact = [LKStorage.shared getContactWithSessionID:recipientId];
|
|
|
|
if (!contact.profilePictureEncryptionKey) { return; }
|
|
|
|
NSString *_Nullable profileName =
|
|
[self decryptProfileNameData:profileNameEncrypted profileKey:contact.profilePictureEncryptionKey];
|
|
|
|
contact.name = profileName;
|
|
contact.profilePictureURL = avatarUrlPath;
|
|
|
|
// Whenever we change avatarUrlPath, OWSUserProfile clears avatarFileName.
|
|
// So if avatarUrlPath is set and avatarFileName is not set, we should to
|
|
// download this avatar. downloadAvatarForUserProfile will de-bounce
|
|
// downloads.
|
|
BOOL hasProfilePictureURL = (contact.profilePictureURL != nil && contact.profilePictureURL.length > 0);
|
|
BOOL hasProfilePictureFileName = (contact.profilePictureFileName != nil && contact.profilePictureFileName.length > 0);
|
|
if (hasProfilePictureURL && !hasProfilePictureFileName) {
|
|
[self downloadAvatarForUserProfile:contact];
|
|
}
|
|
});
|
|
}
|
|
|
|
- (BOOL)isNullableDataEqual:(NSData *_Nullable)left toData:(NSData *_Nullable)right
|
|
{
|
|
if (left == nil && right == nil) {
|
|
return YES;
|
|
} else if (left == nil || right == nil) {
|
|
return YES;
|
|
} else {
|
|
return [left isEqual:right];
|
|
}
|
|
}
|
|
|
|
- (BOOL)isNullableStringEqual:(NSString *_Nullable)left toString:(NSString *_Nullable)right
|
|
{
|
|
if (left == nil && right == nil) {
|
|
return YES;
|
|
} else if (left == nil || right == nil) {
|
|
return YES;
|
|
} else {
|
|
return [left isEqualToString:right];
|
|
}
|
|
}
|
|
|
|
#pragma mark - Profile Encryption
|
|
|
|
- (nullable NSData *)encryptProfileData:(nullable NSData *)encryptedData profileKey:(OWSAES256Key *)profileKey
|
|
{
|
|
OWSAssertDebug(profileKey.keyData.length == kAES256_KeyByteLength);
|
|
|
|
if (!encryptedData) {
|
|
return nil;
|
|
}
|
|
|
|
return [Cryptography encryptAESGCMWithProfileData:encryptedData key:profileKey];
|
|
}
|
|
|
|
- (nullable NSData *)decryptProfileData:(nullable NSData *)encryptedData profileKey:(OWSAES256Key *)profileKey
|
|
{
|
|
OWSAssertDebug(profileKey.keyData.length == kAES256_KeyByteLength);
|
|
|
|
if (!encryptedData) {
|
|
return nil;
|
|
}
|
|
|
|
return [Cryptography decryptAESGCMWithProfileData:encryptedData key:profileKey];
|
|
}
|
|
|
|
- (nullable NSString *)decryptProfileNameData:(nullable NSData *)encryptedData profileKey:(OWSAES256Key *)profileKey
|
|
{
|
|
OWSAssertDebug(profileKey.keyData.length == kAES256_KeyByteLength);
|
|
|
|
NSData *_Nullable decryptedData = [self decryptProfileData:encryptedData profileKey:profileKey];
|
|
if (decryptedData.length < 1) {
|
|
return nil;
|
|
}
|
|
|
|
|
|
// Unpad profile name.
|
|
NSUInteger unpaddedLength = 0;
|
|
const char *bytes = decryptedData.bytes;
|
|
|
|
// Work through the bytes until we encounter our first
|
|
// padding byte (our padding scheme is NULL bytes)
|
|
for (NSUInteger i = 0; i < decryptedData.length; i++) {
|
|
if (bytes[i] == 0x00) {
|
|
break;
|
|
}
|
|
unpaddedLength = i + 1;
|
|
}
|
|
|
|
NSData *unpaddedData = [decryptedData subdataWithRange:NSMakeRange(0, unpaddedLength)];
|
|
|
|
return [[NSString alloc] initWithData:unpaddedData encoding:NSUTF8StringEncoding];
|
|
}
|
|
|
|
- (nullable NSData *)encryptProfileData:(nullable NSData *)data
|
|
{
|
|
OWSAES256Key *localProfileKey = [LKStorage.shared getUser].profilePictureEncryptionKey;
|
|
|
|
return [self encryptProfileData:data profileKey:localProfileKey];
|
|
}
|
|
|
|
- (BOOL)isProfileNameTooLong:(nullable NSString *)profileName
|
|
{
|
|
OWSAssertIsOnMainThread();
|
|
|
|
NSData *nameData = [profileName dataUsingEncoding:NSUTF8StringEncoding];
|
|
return nameData.length > kOWSProfileManager_NameDataLength;
|
|
}
|
|
|
|
- (nullable NSData *)encryptProfileNameWithUnpaddedName:(NSString *)name
|
|
{
|
|
NSData *nameData = [name dataUsingEncoding:NSUTF8StringEncoding];
|
|
if (nameData.length > kOWSProfileManager_NameDataLength) {
|
|
OWSFailDebug(@"name data is too long with length:%lu", (unsigned long)nameData.length);
|
|
return nil;
|
|
}
|
|
|
|
NSUInteger paddingByteCount = kOWSProfileManager_NameDataLength - nameData.length;
|
|
|
|
NSMutableData *paddedNameData = [nameData mutableCopy];
|
|
// Since we want all encrypted profile names to be the same length on the server, we use `increaseLengthBy`
|
|
// to pad out any remaining length with 0 bytes.
|
|
[paddedNameData increaseLengthBy:paddingByteCount];
|
|
OWSAssertDebug(paddedNameData.length == kOWSProfileManager_NameDataLength);
|
|
|
|
OWSAES256Key *localProfileKey = [LKStorage.shared getUser].profilePictureEncryptionKey;
|
|
|
|
return [self encryptProfileData:[paddedNameData copy] profileKey:localProfileKey];
|
|
}
|
|
|
|
#pragma mark - Avatar Disk Cache
|
|
|
|
- (nullable NSData *)loadProfileDataWithFilename:(NSString *)filename
|
|
{
|
|
if (filename.length <= 0) { return nil; };
|
|
|
|
NSString *filePath = [OWSUserProfile profileAvatarFilepathWithFilename:filename];
|
|
return [NSData dataWithContentsOfFile:filePath];
|
|
}
|
|
|
|
- (nullable UIImage *)loadProfileAvatarWithFilename:(NSString *)filename
|
|
{
|
|
if (filename.length == 0) {
|
|
return nil;
|
|
}
|
|
|
|
UIImage *_Nullable image = nil;
|
|
@synchronized(self.profileAvatarImageCache)
|
|
{
|
|
image = [self.profileAvatarImageCache objectForKey:filename];
|
|
}
|
|
if (image) {
|
|
return image;
|
|
}
|
|
|
|
NSData *data = [self loadProfileDataWithFilename:filename];
|
|
if (![data ows_isValidImage]) {
|
|
return nil;
|
|
}
|
|
image = [UIImage imageWithData:data];
|
|
[self updateProfileAvatarCache:image filename:filename];
|
|
return image;
|
|
}
|
|
|
|
- (void)updateProfileAvatarCache:(nullable UIImage *)image filename:(NSString *)filename
|
|
{
|
|
if (filename.length <= 0) { return; };
|
|
|
|
@synchronized(self.profileAvatarImageCache)
|
|
{
|
|
if (image) {
|
|
[self.profileAvatarImageCache setObject:image forKey:filename];
|
|
} else {
|
|
[self.profileAvatarImageCache removeObjectForKey:filename];
|
|
}
|
|
}
|
|
}
|
|
|
|
@end
|
|
|
|
NS_ASSUME_NONNULL_END
|