leptos-null

## Protobuf syntax highlighting for nano by Leptos
## Based off creekpld's Swift syntax highlighter

syntax "Protobuf" "\.proto$"

# Default
color white ".+"

# Keywords
color yellow "^ *\<(syntax|package|import|option)\>"

leptos-null

Writing an iOS YouTube Music client

I’ve been using YouTube Music as my main music streaming service for almost a year and a half. The iOS client is great- I’ve never had a single complaint. It’s potentially one of the most bug free apps I’ve ever used, it has an extremely friendly, and simple, graphical interface, and the service itself is great.

I was curious how the client worked in terms of networking, and while curiosity may treat cats poorly, it lands researchers in black sites can provide a lot of insight.

Step 0

The first thing I do when reverse engineering a client is monitor HTTP requests while the application starts up, and when doing the tasks interested in. On a jailbroken iOS device, I use FLEX by FlipBoard.

leptos-null

//
//  progress_bar.c
//
//  Created by Leptos on 2/17/19.
//  Copyright © 2018 Leptos. All rights reserved.
//

#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>

leptos-null

//
//  ios_image_app_url_dump
//
//  Created by Leptos on 2/19/19.
//  Copyright © 2019 Leptos. All rights reserved.
//

/* compile with:
 * $ clang -fobjc-arc -framework Foundation
 */

leptos-null

//
//  floating.c
//  funbits
//
//  Created by Leptos on 8/18/18.
//  Copyright © 2018 Leptos. All rights reserved.
//

#include <stdio.h>
#include <stdlib.h>

leptos-null

union UIOrientationPortableState {
    struct UIOrientationState {
        enum UIOrientation { /* this is UIInterfaceOrientation, but unsigned */
            UIOrientationUnknown,
            UIOrientationPortrait,
            UIOrientationPortraitUpsideDown,
            UIOrientationLandscapeRight,
            UIOrientationLandscapeLeft
        }
        current  : 3, // may be the orientation the device is transitioning to, if transition != UITransitionPhaseZero

leptos-null

//
//  taylor_sin.c
//
//  Created by Leptos on 4/25/19.
//  Copyright © 2019 Leptos. All rights reserved.
//

#include <math.h>  // not required- included only for the M_PI macros which are also included below
#include <errno.h> // needed to set errno in the even that the input of sin is an infinity

leptos-null

//
//  mach_slide.c
//
//  This code was based on functions from https://opensource.apple.com/source/dyld
//  See the Apple Public Source License https://www.opensource.apple.com/apsl
//
//  Created by Leptos on 5/11/19.
//

#include <string.h>

leptos-null

Temperature Scaling

What’s it mean if the temperature is going to be 30% warmer or 30% cooler?

Distance Scaling

Let’s take something that we know works: distances. If I have a distance that’s 2 meters, 30% more is (x=2, s=0.3; x*(1+s)) 2.6 meters, and 30% less is (x=2, s=-0.3; x*(1+s)) 1.4 meters. Covert these three values to feet, you get 6.56, 8.53, and 4.59 respectively. If we plug these numbers back into our scaling equation: more is (x=6.56, s=0.3; x*(1+s)) 8.528 feet, and less is (x=6.56, s=-0.3; x*(1+s)) 4.592 feet. These values are slightly off due to rounding.

Fixing Temperature

The problem with temperature is that it’s not zero-based. A value some incremental amount warmer than 5 degrees Fahrenheit is still cold. We need to “normalize” temperature. To do that, we have to find a value such that anything warmer feels warmer, and anything cooler feels cooler. We’re going to use 22°C (72°F) for this value.

leptos-null

//
//  statusbartypes
//
//  Created by Leptos on 3/19/19.
//  Copyright © 2019 Leptos. All rights reserved.
//

#import <UIKit/UIKit.h>

typedef int UIStatusBarItemType;