Help/Support [Help/Tweak]How to hook the ASIdentifierManager (using NSClassFromString)?

[youngzzzzzzz 2]

Edited 25/5

it's been solved.

I added the AdSupport framework to the makefile in the tweak project and done.

 

 

I want to change the idfa value (like what PMP doing) and try to write some hooking codes.

//target codes #1

#import <AdSupport/AdSupport.h>
- (NSString *)idfaString {
    
    NSBundle *adSupportBundle = [NSBundle bundleWithPath:@"/System/Library/Frameworks/AdSupport.framework"];
    [adSupportBundle load];
    
    if (adSupportBundle == nil) {
        return @"";
    }
    else{
        
        Class asIdentifierMClass = NSClassFromString(@"ASIdentifierManager");
        
        if(asIdentifierMClass == nil){
            return @"";
        }
        else{
            
            //for no arc
            //ASIdentifierManager *asIM = [[[asIdentifierMClass alloc] init] autorelease];
            //for arc
            ASIdentifierManager *asIM = [[asIdentifierMClass alloc] init];
            
            if (asIM == nil) {
                return @"";
            }
            else{
                
                if(asIM.advertisingTrackingEnabled){
                    return [asIM.advertisingIdentifier UUIDString]; //target value
                }
                else{
                    return [asIM.advertisingIdentifier UUIDString];//target value
                }
            }
        }
    }
}

Tweak.xm

#import <AdSupport/ASIdentifierManager.h>
#import <AdSupport/AdSupport.h>

%hook ASIdentifierManager

-(NSUUID*)advertisingIdentifier
{
    %log;
    NSUUID *x = [[NSUUID alloc] initWithUUIDString:@"11111111-1111-1111-1111-111111111111"];
    return x;
}

%end

unfortunately , it doesnt works.

So I took another try,

//target codes #2

#import <AdSupport/AdSupport.h>
- (NSString *)idfaString {
            ASIdentifierManager *aim = [[ASIdentifierManager alloc] init];
            if (aim != nil) {
                if (aim.isAdvertisingTrackingEnabled) {
                    return [[aim advertisingIdentifier] UUIDString];
                }else{
                    return @"";
                }
            }
    return @"";
}

and it works!

 

I want to know why target codes #1 didn't work and how to make it work.

Updated May 25, 2015 by youngzzzzzzz

[Guest]

Oh man I don't know much Obj-C at all wow thats alot I only know ARM and java

 

Hopefully @@castix, @@intramorph, or @ can help you. I havno idea what is going on

[AnotherLurker 1.6k]

I cant help u, im a total newb

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

jk,

Im not sure, but i dont see how u can load a Framework as a Bundle, a Bundle requires Info.plist among other things, which framework doesnt have, if not,

You should try NSLogging before returning @"" then checking syslog to see what happened

Updated May 21, 2015 by RickHaks

[castix 18.5k iPhone X 12.1.1]

Maybe NSUUID is deprecated

[youngzzzzzzz 2]

I cant help u, im a total newb

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

jk,

Im not sure, but i dont see how u can load a Framework as a Bundle, a Bundle requires Info.plist among other things, which framework doesnt have, if not,

You should try NSLogging before returning @"" then checking syslog to see what happened

 

Mmm..the syslog show:

<Warning>: MS:Warning: nil class argument for selector advertisingIdentifier

I thought it could not hook the function while using the Bundle to new the Class.

Maybe NSUUID is deprecated

But code No.2 works.

[AnotherLurker 1.6k]

Maybe NSUUID is deprecated

[youngzzzzzzz 2]

I added the AdSupport framework to the makefile in the tweak project and done.