SideloadedFixes.x

#import <mach-o/dyld.h>
#import <Foundation/Foundation.h>

// Credit goes to opa334 and his code: https://github.com/opa334/IGSideloadFix

NSString* keychainAccessGroup;
NSURL* fakeGroupContainerURL;

void createDirectoryIfNotExists(NSURL* URL)
{
    if(![URL checkResourceIsReachableAndReturnError:nil])
    {
        [[NSFileManager defaultManager] createDirectoryAtURL:URL withIntermediateDirectories:YES attributes:nil error:nil];
    }
}

%group SideloadedFixes

%hook NSFileManager

- (NSURL*)containerURLForSecurityApplicationGroupIdentifier:(NSString*)groupIdentifier
{
	NSURL* fakeURL = [fakeGroupContainerURL URLByAppendingPathComponent:groupIdentifier];

	createDirectoryIfNotExists(fakeURL);
	createDirectoryIfNotExists([fakeURL URLByAppendingPathComponent:@"Library"]);
	createDirectoryIfNotExists([fakeURL URLByAppendingPathComponent:@"Library/Caches"]);

	return fakeURL;
}

%end

void loadKeychainAccessGroup()
{
	NSDictionary* dummyItem = @{
		(__bridge id)kSecClass : (__bridge id)kSecClassGenericPassword,
		(__bridge id)kSecAttrAccount : @"dummyItem",
		(__bridge id)kSecAttrService : @"dummyService",
		(__bridge id)kSecReturnAttributes : @YES,
	};

	CFTypeRef result;
	OSStatus ret = SecItemCopyMatching((__bridge CFDictionaryRef)dummyItem, &result);
    if(ret == -25300)
	{
		ret = SecItemAdd((__bridge CFDictionaryRef)dummyItem, &result);
	}

	if(ret == 0 && result)
	{
		NSDictionary* resultDict = (__bridge id)result;
		keychainAccessGroup = resultDict[(__bridge id)kSecAttrAccessGroup];
		NSLog(@"loaded keychainAccessGroup: %@", keychainAccessGroup);
	}
}

%hook FBSDKKeychainStore

- (NSString*)accessGroup
{
	return keychainAccessGroup;
}

%end

%hook FBKeychainItemController

- (NSString*)accessGroup
{
	return keychainAccessGroup;
}

%end

%hook UICKeyChainStore

- (NSString*)accessGroup
{
	return keychainAccessGroup;
}

%end
%end

void initSideloadedFixes()
{
	fakeGroupContainerURL = [NSURL fileURLWithPath:[NSHomeDirectory() stringByAppendingPathComponent:@"Documents/FakeGroupContainers"] isDirectory:YES];
	loadKeychainAccessGroup();
	%init(SideloadedFixes);
}