space-ios/iOSClient/Settings/NCManageEndToEndEncryption.m

//
//  NCManageEndToEndEncryption.m
//  Nextcloud
//
//  Created by Marino Faggiana on 13/10/17.
//  Copyright © 2017 Marino Faggiana. All rights reserved.
//
//  Author Marino Faggiana <marino.faggiana@nextcloud.com>
//
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
//

#import "NCManageEndToEndEncryption.h"
#import "AppDelegate.h"
#import "CCNetworking.h"

#import "NCBridgeSwift.h"

@interface NCManageEndToEndEncryption () <NCEndToEndInitializeDelegate>
{
    AppDelegate *appDelegate;

    NSUInteger _failedAttempts;
    NSDate *_lockUntilDate;
}
@end

@implementation NCManageEndToEndEncryption

- (void)initializeForm
{
    XLFormDescriptor *form = [XLFormDescriptor formDescriptorWithTitle:NSLocalizedString(@"_e2e_settings_", nil)];
    XLFormSectionDescriptor *section;
    XLFormRowDescriptor *row;
    
    tableCapabilities *capabilities = [[NCManageDatabase sharedInstance] getCapabilitesWithAccount:appDelegate.activeAccount];

    if (capabilities.endToEndEncryption == NO) {
        
        // Section SERVICE NOT AVAILABLE -------------------------------------------------
        
        section = [XLFormSectionDescriptor formSection];
        [form addFormSection:section];
        
        row = [XLFormRowDescriptor formRowDescriptorWithTag:@"serviceActivated" rowType:XLFormRowDescriptorTypeInfo title:NSLocalizedString(@"_e2e_settings_not_available_", nil)];
        row.cellConfigAtConfigure[@"backgroundColor"] = NCBrandColor.sharedInstance.backgroundView;
        [row.cellConfig setObject:[CCGraphics changeThemingColorImage:[UIImage imageNamed:@"closeCircle"] width:50 height:50 color:[UIColor redColor]] forKey:@"imageView.image"];
        [row.cellConfig setObject:[UIFont systemFontOfSize:15.0]forKey:@"textLabel.font"];
        [row.cellConfig setObject:NCBrandColor.sharedInstance.textView forKey:@"textLabel.textColor"];
        [row.cellConfig setObject:@(NSTextAlignmentLeft) forKey:@"textLabel.textAlignment"];
        [section addFormRow:row];
        
        self.form = form;

        return;
    }
    
    if ([CCUtility isEndToEndEnabled:appDelegate.activeAccount]) {
        
        // Section SERVICE ACTIVATED -------------------------------------------------
        
        section = [XLFormSectionDescriptor formSection];
        [form addFormSection:section];
        
        row = [XLFormRowDescriptor formRowDescriptorWithTag:@"serviceActivated" rowType:XLFormRowDescriptorTypeInfo title:NSLocalizedString(@"_e2e_settings_activated_", nil)];
        row.cellConfigAtConfigure[@"backgroundColor"] = NCBrandColor.sharedInstance.backgroundView;
        [row.cellConfig setObject:[CCGraphics changeThemingColorImage:[UIImage imageNamed:@"selectFull"] width:50 height:50 color:[UIColor greenColor]] forKey:@"imageView.image"];
        [row.cellConfig setObject:[UIFont systemFontOfSize:15.0]forKey:@"textLabel.font"];
        [row.cellConfig setObject:NCBrandColor.sharedInstance.textView forKey:@"textLabel.textColor"];
        [row.cellConfig setObject:@(NSTextAlignmentLeft) forKey:@"textLabel.textAlignment"];
        [section addFormRow:row];
        
        // Section PASSPHRASE -------------------------------------------------
        
        section = [XLFormSectionDescriptor formSection];
        [form addFormSection:section];
        
        // Read Passphrase
        row = [XLFormRowDescriptor formRowDescriptorWithTag:@"readPassphrase" rowType:XLFormRowDescriptorTypeButton title:NSLocalizedString(@"_e2e_settings_read_passphrase_", nil)];
        row.cellConfigAtConfigure[@"backgroundColor"] = NCBrandColor.sharedInstance.backgroundView;
        [row.cellConfig setObject:[CCGraphics changeThemingColorImage:[UIImage imageNamed:@"e2eReadPassphrase"] width:50 height:50 color:NCBrandColor.sharedInstance.icon] forKey:@"imageView.image"];
        [row.cellConfig setObject:[UIFont systemFontOfSize:15.0]forKey:@"textLabel.font"];
        [row.cellConfig setObject:NCBrandColor.sharedInstance.textView forKey:@"textLabel.textColor"];
        [row.cellConfig setObject:@(NSTextAlignmentLeft) forKey:@"textLabel.textAlignment"];
        row.action.formSelector = @selector(readPassphrase:);
        [section addFormRow:row];
        
        
        // Section DELETE -------------------------------------------------
        
        section = [XLFormSectionDescriptor formSection];
        [form addFormSection:section];
        
        // remove locally Encryption
        row = [XLFormRowDescriptor formRowDescriptorWithTag:@"removeLocallyEncryption" rowType:XLFormRowDescriptorTypeButton title:NSLocalizedString(@"_e2e_settings_remove_", nil)];
        row.cellConfigAtConfigure[@"backgroundColor"] = NCBrandColor.sharedInstance.backgroundView;
        [row.cellConfig setObject:[CCGraphics changeThemingColorImage:[UIImage imageNamed:@"lock"] width:50 height:50 color:NCBrandColor.sharedInstance.icon] forKey:@"imageView.image"];
        [row.cellConfig setObject:[UIFont systemFontOfSize:15.0]forKey:@"textLabel.font"];
        [row.cellConfig setObject:NCBrandColor.sharedInstance.textView forKey:@"textLabel.textColor"];
        [row.cellConfig setObject:@(NSTextAlignmentLeft) forKey:@"textLabel.textAlignment"];
        row.action.formSelector = @selector(removeLocallyEncryption:);
        [section addFormRow:row];
        
    } else {
        
        // Section START E2E -------------------------------------------------

        section = [XLFormSectionDescriptor formSection];
        [form addFormSection:section];
    
        // Start e2e
        row = [XLFormRowDescriptor formRowDescriptorWithTag:@"startE2E" rowType:XLFormRowDescriptorTypeButton title:NSLocalizedString(@"_e2e_settings_start_", nil)];
        row.cellConfigAtConfigure[@"backgroundColor"] = NCBrandColor.sharedInstance.backgroundView;
        [row.cellConfig setObject:[UIFont systemFontOfSize:15.0]forKey:@"textLabel.font"];
        [row.cellConfig setObject:NCBrandColor.sharedInstance.textView forKey:@"textLabel.textColor"];
        [row.cellConfig setObject:@(NSTextAlignmentLeft) forKey:@"textLabel.textAlignment"];
        row.action.formSelector = @selector(startE2E:);
        [section addFormRow:row];   
    }
    
#ifdef DEBUG
    // Section DELETE KEYS -------------------------------------------------
    
    section = [XLFormSectionDescriptor formSectionWithTitle:NSLocalizedString(@"Delete server keys ", nil)];
    [form addFormSection:section];
    
    // Delete publicKey
    row = [XLFormRowDescriptor formRowDescriptorWithTag:@"deletePublicKey" rowType:XLFormRowDescriptorTypeButton title:NSLocalizedString(@"Delete PublicKey", nil)];
    row.cellConfigAtConfigure[@"backgroundColor"] = NCBrandColor.sharedInstance.backgroundView;
    [row.cellConfig setObject:[UIFont systemFontOfSize:15.0]forKey:@"textLabel.font"];
    [row.cellConfig setObject:NCBrandColor.sharedInstance.textView forKey:@"textLabel.textColor"];
    [row.cellConfig setObject:@(NSTextAlignmentLeft) forKey:@"textLabel.textAlignment"];
    row.action.formSelector = @selector(deletePublicKey:);
    [section addFormRow:row];
    
    // Delete privateKey
    row = [XLFormRowDescriptor formRowDescriptorWithTag:@"deletePrivateKey" rowType:XLFormRowDescriptorTypeButton title:NSLocalizedString(@"Delete PrivateKey", nil)];
    row.cellConfigAtConfigure[@"backgroundColor"] = NCBrandColor.sharedInstance.backgroundView;
    [row.cellConfig setObject:[UIFont systemFontOfSize:15.0]forKey:@"textLabel.font"];
    [row.cellConfig setObject:NCBrandColor.sharedInstance.textView forKey:@"textLabel.textColor"];
    [row.cellConfig setObject:@(NSTextAlignmentLeft) forKey:@"textLabel.textAlignment"];
    row.action.formSelector = @selector(deletePrivateKey:);
    [section addFormRow:row];
#endif
    
    self.form = form;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(changeTheming) name:@"changeTheming" object:nil];
    [self initializeForm];
    
    // E2EE
    self.endToEndInitialize = [NCEndToEndInitialize new];
    self.endToEndInitialize.delegate = self;
}

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    
    self.tableView.backgroundColor = NCBrandColor.sharedInstance.backgroundView;
    self.tableView.showsVerticalScrollIndicator = NO;
    self.tableView.separatorColor = NCBrandColor.sharedInstance.separator;
    
    [appDelegate aspectNavigationControllerBar:self.navigationController.navigationBar online:[appDelegate.reachability isReachable] hidden:NO];
    [appDelegate aspectTabBar:self.tabBarController.tabBar hidden:NO];
}

- (void)changeTheming
{
    [appDelegate changeTheming:self tableView:self.tableView collectionView:nil];
    [self initializeForm];
}

#pragma --------------------------------------------------------------------------------------------
#pragma mark === Action ===
#pragma --------------------------------------------------------------------------------------------

- (void)startE2E:(XLFormRowDescriptor *)sender
{
    [self deselectFormRow:sender];

    if ([[CCUtility getBlockCode] length]) {
        
        CCBKPasscode *viewController = [[CCBKPasscode alloc] initWithNibName:nil bundle:nil];
        viewController.delegate = self;
        viewController.fromType = CCBKPasscodeFromStartEncryption;
        viewController.type = BKPasscodeViewControllerCheckPasscodeType;
        
        if ([CCUtility getSimplyBlockCode]) {
            viewController.passcodeStyle = BKPasscodeInputViewNumericPasscodeStyle;
            viewController.passcodeInputView.maximumLength = 6;
        } else {
            viewController.passcodeStyle = BKPasscodeInputViewNormalPasscodeStyle;
            viewController.passcodeInputView.maximumLength = 64;
        }
        
        BKTouchIDManager *touchIDManager = [[BKTouchIDManager alloc] initWithKeychainServiceName:k_serviceShareKeyChain];
        touchIDManager.promptText = NSLocalizedString(@"_scan_fingerprint_", nil);
        viewController.touchIDManager = touchIDManager;
        
        viewController.title = NSLocalizedString(@"_e2e_settings_start_", nil);
        viewController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(passcodeViewCloseButtonPressed:)];
        viewController.navigationItem.leftBarButtonItem.tintColor = [UIColor blackColor];
        
        UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
        navigationController.modalPresentationStyle = UIModalPresentationFullScreen;
        [self presentViewController:navigationController animated:YES completion:nil];
        
    } else {
        
        UIAlertController *alertController = [UIAlertController alertControllerWithTitle:NSLocalizedString(@"_info_", nil) message:NSLocalizedString(@"_e2e_settings_lock_not_active_", nil) preferredStyle:UIAlertControllerStyleAlert];
        UIAlertAction *okAction = [UIAlertAction actionWithTitle:NSLocalizedString(@"OK", @"OK action") style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
        }];
        [alertController addAction:okAction];
        [self presentViewController:alertController animated:YES completion:nil];
    }
}

- (void)readPassphrase:(XLFormRowDescriptor *)sender
{
    [self deselectFormRow:sender];
    
    if ([[CCUtility getBlockCode] length]) {
        
        CCBKPasscode *viewController = [[CCBKPasscode alloc] initWithNibName:nil bundle:nil];
        viewController.delegate = self;
        viewController.fromType = CCBKPasscodeFromCheckPassphrase;
        viewController.type = BKPasscodeViewControllerCheckPasscodeType;
            
        if ([CCUtility getSimplyBlockCode]) {
            viewController.passcodeStyle = BKPasscodeInputViewNumericPasscodeStyle;
            viewController.passcodeInputView.maximumLength = 6;
        } else {
            viewController.passcodeStyle = BKPasscodeInputViewNormalPasscodeStyle;
            viewController.passcodeInputView.maximumLength = 64;
        }
        
        BKTouchIDManager *touchIDManager = [[BKTouchIDManager alloc] initWithKeychainServiceName:k_serviceShareKeyChain];
        touchIDManager.promptText = NSLocalizedString(@"_scan_fingerprint_", nil);
        viewController.touchIDManager = touchIDManager;
        
        viewController.title = NSLocalizedString(@"_e2e_settings_read_passphrase_", nil);
        viewController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(passcodeViewCloseButtonPressed:)];
        viewController.navigationItem.leftBarButtonItem.tintColor = [UIColor blackColor];
        
        UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
        navigationController.modalPresentationStyle = UIModalPresentationFullScreen;
        [self presentViewController:navigationController animated:YES completion:nil];
        
    } else {
        
        UIAlertController *alertController = [UIAlertController alertControllerWithTitle:NSLocalizedString(@"_info_", nil) message:NSLocalizedString(@"_e2e_settings_lock_not_active_", nil) preferredStyle:UIAlertControllerStyleAlert];
        UIAlertAction *okAction = [UIAlertAction actionWithTitle:NSLocalizedString(@"OK", @"OK action") style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
        }];
        [alertController addAction:okAction];
        [self presentViewController:alertController animated:YES completion:nil];
    }
}

- (void)removeLocallyEncryption:(XLFormRowDescriptor *)sender
{
    [self deselectFormRow:sender];
    
    if ([[CCUtility getBlockCode] length]) {
        
        CCBKPasscode *viewController = [[CCBKPasscode alloc] initWithNibName:nil bundle:nil];
        viewController.delegate = self;
        viewController.fromType = CCBKPasscodeFromRemoveEncryption;
        viewController.type = BKPasscodeViewControllerCheckPasscodeType;
        
        if ([CCUtility getSimplyBlockCode]) {
            viewController.passcodeStyle = BKPasscodeInputViewNumericPasscodeStyle;
            viewController.passcodeInputView.maximumLength = 6;
        } else {
            viewController.passcodeStyle = BKPasscodeInputViewNormalPasscodeStyle;
            viewController.passcodeInputView.maximumLength = 64;
        }
        
        BKTouchIDManager *touchIDManager = [[BKTouchIDManager alloc] initWithKeychainServiceName:k_serviceShareKeyChain];
        touchIDManager.promptText = NSLocalizedString(@"_scan_fingerprint_", nil);
        viewController.touchIDManager = touchIDManager;
        
        viewController.title = NSLocalizedString(@"_e2e_settings_remove_", nil);
        viewController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(passcodeViewCloseButtonPressed:)];
        viewController.navigationItem.leftBarButtonItem.tintColor = [UIColor blackColor];
        
        UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
        navigationController.modalPresentationStyle = UIModalPresentationFullScreen;
        [self presentViewController:navigationController animated:YES completion:nil];
        
    } else {
        
        UIAlertController *alertController = [UIAlertController alertControllerWithTitle:NSLocalizedString(@"_info_", nil) message:NSLocalizedString(@"_e2e_settings_lock_not_active_", nil) preferredStyle:UIAlertControllerStyleAlert];
        UIAlertAction *okAction = [UIAlertAction actionWithTitle:NSLocalizedString(@"OK", @"OK action") style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
        }];
        [alertController addAction:okAction];
        [self presentViewController:alertController animated:YES completion:nil];
    }
}

- (void)deletePublicKey:(XLFormRowDescriptor *)sender
{
    [self deselectFormRow:sender];
    
    [[NCNetworkingEndToEnd sharedManager] deleteEndToEndPublicKeyWithAccount:appDelegate.activeAccount completion:^(NSString *account, NSString *message, NSInteger errorCode) {
        
        if (errorCode == 0 && [account isEqualToString:appDelegate.activeAccount]) {
            [appDelegate messageNotification:@"E2E delete publicKey" description:@"Success" visible:YES delay:k_dismissAfterSecond type:TWMessageBarMessageTypeSuccess errorCode:0];
        } else {
            [appDelegate messageNotification:@"E2E delete publicKey" description:message visible:YES delay:k_dismissAfterSecond type:TWMessageBarMessageTypeError errorCode:k_CCErrorInternalError];
        }
    }];
}

- (void)deletePrivateKey:(XLFormRowDescriptor *)sender
{
    [self deselectFormRow:sender];
    
    [[NCNetworkingEndToEnd sharedManager] deleteEndToEndPrivateKeyWithAccount:appDelegate.activeAccount completion:^(NSString *account, NSString *message, NSInteger errorCode) {
        
        if (errorCode == 0 && [account isEqualToString:appDelegate.activeAccount]) {
            [appDelegate messageNotification:@"E2E delete privateKey" description:@"Success" visible:YES delay:k_dismissAfterSecond type:TWMessageBarMessageTypeSuccess errorCode:0];
        } else {
            [appDelegate messageNotification:@"E2E delete privateKey" description:message visible:YES delay:k_dismissAfterSecond type:TWMessageBarMessageTypeError errorCode:k_CCErrorInternalError];
        }
    }];
}

#pragma --------------------------------------------------------------------------------------------
#pragma mark === Delegate ===
#pragma --------------------------------------------------------------------------------------------

- (void)endToEndInitializeSuccess
{
    // Reload All Datasource
    [[NSNotificationCenter defaultCenter] postNotificationOnMainThreadName:@"clearDateReadDataSource" object:nil];

    [self initializeForm];
}

#pragma --------------------------------------------------------------------------------------------
#pragma mark === BKPasscodeViewController ===
#pragma --------------------------------------------------------------------------------------------

- (NSUInteger)passcodeViewControllerNumberOfFailedAttempts:(CCBKPasscode *)aViewController
{
    return _failedAttempts;
}

- (NSDate *)passcodeViewControllerLockUntilDate:(CCBKPasscode *)aViewController
{
    return _lockUntilDate;
}

- (void)passcodeViewCloseButtonPressed:(id)sender
{
    [self dismissViewControllerAnimated:YES completion:nil];
}

- (void)passcodeViewController:(CCBKPasscode *)aViewController authenticatePasscode:(NSString *)aPasscode resultHandler:(void (^)(BOOL))aResultHandler
{
    if ([aPasscode isEqualToString:[CCUtility getBlockCode]]) {
        _lockUntilDate = nil;
        _failedAttempts = 0;
        aResultHandler(YES);
    } else
        aResultHandler(NO);
}

- (void)passcodeViewController:(CCBKPasscode *)aViewController didFinishWithPasscode:(NSString *)aPasscode
{
    [aViewController dismissViewControllerAnimated:YES completion:nil];
    
    if (aViewController.fromType == CCBKPasscodeFromStartEncryption) {
        
        [self.endToEndInitialize initEndToEndEncryption];        
    }
    
    if (aViewController.fromType == CCBKPasscodeFromCheckPassphrase) {
    
        NSString *e2ePassphrase = [CCUtility getEndToEndPassphrase:appDelegate.activeAccount];
        NSLog(@"[LOG] Passphrase: %@", e2ePassphrase);
    
        NSString *message = [NSString stringWithFormat:@"\n%@\n\n\n%@", NSLocalizedString(@"_e2e_settings_the_passphrase_is_", nil), e2ePassphrase];
    
        UIAlertController *alertController = [UIAlertController alertControllerWithTitle:NSLocalizedString(@"_info_", nil) message:message preferredStyle:UIAlertControllerStyleAlert];
        UIAlertAction *okAction = [UIAlertAction actionWithTitle:NSLocalizedString(@"OK", @"OK action") style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
        }];
        [alertController addAction:okAction];
        [self presentViewController:alertController animated:YES completion:nil];
    }
    
    if (aViewController.fromType == CCBKPasscodeFromRemoveEncryption) {
     
        UIAlertController *alertController = [UIAlertController alertControllerWithTitle:NSLocalizedString(@"_e2e_settings_remove_", nil) message:NSLocalizedString(@"_e2e_settings_remove_message_", nil) preferredStyle:UIAlertControllerStyleAlert];
        
        UIAlertAction *okAction = [UIAlertAction actionWithTitle:NSLocalizedString(@"_remove_", nil) style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
            [CCUtility clearAllKeysEndToEnd:appDelegate.activeAccount];
            [self initializeForm];
        }];
        
        UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:NSLocalizedString(@"_cancel_",nil) style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
            NSLog(@"[LOG] Cancel action");
        }];
        
        [alertController addAction:okAction];
        [alertController addAction:cancelAction];
        [self presentViewController:alertController animated:YES completion:nil];
    }
}

@end