uicache/AppEnabler/main.x

/**
 * AppEnabler for nitoTV
 *
 * Makes it possible to load Applications from /var/mobile/Applications
 *
 * By Luca Todesco and Kevin Bradley
 *
 */

#import <Foundation/Foundation.h>
#include <mach-o/dyld.h>
#import <objc/runtime.h>
//#import "rocketbootstrap.h"
//#import "AppSupport/CPDistributedMessagingCenter.h"
#import "../PBReloadHelper.h"
#import <Foundation/Foundation.h>
#import "AppSupport/CPDistributedMessagingCenter.h"

@interface NSDistributedNotificationCenter : NSNotificationCenter

+ (id)defaultCenter;

- (void)addObserver:(id)arg1 selector:(SEL)arg2 name:(id)arg3 object:(id)arg4;
- (void)postNotificationName:(id)arg1 object:(id)arg2 userInfo:(id)arg3;

@end

@interface MessageHandler : NSObject
-(void)runAppEnabler:(id)a;
@end
@implementation MessageHandler

-(void)runAppEnabler:(id)a
{
    //NSLog(@"#### for luck!");
    [PBReloadHelper reloadApplications];
}

@end

%class LSContext
%class FSNode

/*
 
 Some fun magic happens in here. We hook _MobileInstallationEnumerateAllInstalledItemDictionaries
 in tvOS 10 and _MobileInstallationCopyInstalledAppsForLaunchServices in tvOS 9 to inject
 our "whitelist" of applications that is created during uicache process.
 
 
 */


//tvOS 10 function for _MobileInstallationEnumerateAllInstalledItemDictionaries
id (*original_func)(uint64_t a, id b);

//tvOS 9 function for _MobileInstallationCopyInstalledAppsForLaunchServices
id (*original_func2)(uint64_t a);

//hook for _MobileInstallationCopyInstalledAppsForLaunchServices

id we_really_out_here_nine(uint64_t a)
{
    
    /*
     
     in tvOS 9 this list is just one huge plist that we need to inject ourselves into the
     System key of.
     
     */
    
    id retv = original_func2(a);
    
    //read the list created in uicache of apps to inject
    
    NSString* pth = @"/var/mobile/Library/Preferences/kjc.appenabler.state.plist";
    NSArray* arr = [NSArray arrayWithContentsOfFile: pth];
    
    if(!arr) return retv;

    NSLog(@"got apps to inject!!");
    
    [retv autorelease];
    retv = [retv mutableCopy];
    
    NSLog(@"retv allKeys:%@", [(NSDictionary*)retv allKeys]);
    
    //get the System key of the installed plist
    id sysdb = retv[@"System"];
    id pkp = retv[@"PluginKitPlugin"];
    
    if(sysdb){
        NSLog(@"injecting to system apps");
        sysdb=[sysdb mutableCopy];
        pkp=[pkp mutableCopy];
        retv[@"System"] = sysdb;
        retv[@"PluginKitPlugin"] = pkp;
        for (NSDictionary* appb in arr)
        {
            NSString *appType = appb[@"ApplicationType"];
            if (![appType isEqualToString:@"PluginKitPlugin"])
            {
                NSLog(@"injecting %@", appb[@"CFBundleIdentifier"]);
                if (sysdb[appb[@"CFBundleIdentifier"]])
                {
                    NSLog(@"already present!! WTF??? overwriting..");
                }
                //add current CFBundleIdentifier to System bundle
                sysdb[appb[@"CFBundleIdentifier"]] = appb;
            } else { //its a plugin
                NSLog(@"injecting %@", appb[@"CFBundleIdentifier"]);
                if (pkp[appb[@"CFBundleIdentifier"]])
                {
                    NSLog(@"already present!! WTF??? overwriting..");
                }
                //add current CFBundleIdentifier to System bundle
                pkp[appb[@"CFBundleIdentifier"]] = appb;
            }
            
        }
    }
    
    //NSLog(@"return: %@",retv);
    
    //at this point we've injected our bundle ids into the System list/
    //from here, some other process adds the entry to PBAppDepot for us! :)
    
    return retv;
}


//hook for _MobileInstallationEnumerateAllInstalledItemDictionaries

id we_really_out_here(uint64_t a, uint64_t (^block)(id b1, uint64_t b2, uint64_t b3))
{
	//NSLog(@"Stack trace : %@",[NSThread callStackSymbols]);

    //define the return block
	uint64_t (^blockz)(id b1, uint64_t b2, uint64_t b3) = ^(id b1, uint64_t b2, uint64_t b3){
		//NSLog(@"called!!! %@ %llx %llx", b1, b2, b3);
		return block(b1, b2, b3);
	};

    //load our whitelist that is created in uicache
	NSString* pth = @"/var/mobile/Library/Preferences/kjc.appenabler.state.plist";
	NSArray* arr = [NSArray arrayWithContentsOfFile: pth];

    //get original return value
	id retv = original_func(a, blockz);
	//NSLog(@"crack out of coke");

    //loop through our apps an call the block to add the application to the list,
    //from here it will be added to PBAppDepot automatically, but in a disabled state.
	for (NSDictionary* appb in arr)
	{
		//blockz(@{@"ApplicationType": @"System", @"CFBundleIdentifier": appb[0], @"CodeInfoIdentifier": appb[0], @"Path": appb[1]},0,0);
		blockz(appb,0,0);
	}


	return retv;
}

%ctor
{
    
	dlopen("/System/Library/PrivateFrameworks/MobileInstallation.framework/MobileInstallation", RTLD_LAZY);
	
	MSImageRef gangshit = MSGetImageByName("/System/Library/PrivateFrameworks/MobileInstallation.framework/MobileInstallation");

    //tvos 10 symbol
	void* weouthere = MSFindSymbol(gangshit, "_MobileInstallationEnumerateAllInstalledItemDictionaries");
	NSLog(@"tvOS 10 hooking %p", weouthere);

	if (weouthere)
	{
		MSHookFunction((void*)weouthere, (void*)we_really_out_here, (void**)&original_func);
		//void (*lolz)() = weouthere;
		//lolz();
	}

    //tvos 9 symbol
    void* weouthere2 = MSFindSymbol(gangshit, "_MobileInstallationCopyInstalledAppsForLaunchServices");
    NSLog(@"ios 9 hooking %p", weouthere2);
    
    if (weouthere2)
    {
        MSHookFunction((void*)weouthere2, (void*)we_really_out_here_nine, (void**)&original_func2);
        //void (*lolz)() = weouthere;
        //lolz();
    }
    
    //NSLog(@"before note center");
    
    NSDistributedNotificationCenter* notificationCenter = [NSDistributedNotificationCenter defaultCenter];
    
    //NSLog(@"after note center");
    [notificationCenter addObserver:[MessageHandler new]  selector:@selector(runAppEnabler:) name:@"kjc.AppEnabler.recache" object:nil];

    // NSLog(@"after observe");
}