ahh cbox expired ._>
oh well nevermind.
hows exams man?
kinda depressed i didnt get an a+ for math.
meh shit happens.
but right now i got so many things to do i dont think i'll ever be bored haha

like modding android apk's to remove licensing
basically right apks are just the apps itself on an android phone.
installing it just copies it to a certain part of your phone.
and its actually a zip file containing program code, images and xmls

xmls - define important parameters of the program,
such as whether it should start up automatically,
or sometimes the text used like menu names etc.

images - contains all the images used by the application
comes in many types, like theres a set of images for
low resolution phones, high resolution phones, mid resolution phones etc.
some programs dont have them cause developers were lazy.

program code - this code is usually in .dex files. well it should be.
the thing about android is that apps execute in a virtual machine
sort of like a computer within a computer.
the computer within can understand .dex code really well so yeah!

so sometimes we might want to change the look of a certain app or
edit its functionality or something. One main reason for modding
apks is to remove license verification. (well who pays for software anyway)

There are many ways to modify (aka mod) an apk.
The first way is to use a .dex to .jar converter.
This converts the .dex to a .jar which is java code.
(btw java is another computing language used by computers)
(a computing language is just like languages.
you can tell the computer to do things using different languages)

so now that we have a .jar file, we can proceed to decompile it.
(decompiling is sorta like converting from computer-understandable code to human-understandable code)
In this case we use JDgui to decompile the jar, modify the necessary code,
then we recompile it using android sdk and create an apk file.
the drawback of this is that its a long-winded process, very error prone
and additionally jdgui cannot decompile all jars. sometimes it screws up
especially when there are switch statements and labels.
so you'd end up with code that doesnt make sense or work.

the second method is to decompile the apk using smali
(smali is an assembler/disassebler for Android's dex format.)
The output of it would be each individual class file, but in smali code.
We can then edit this code and recompile easily.
The drawback of this method is that smali code is really hard to understand
unless you've been working with it for a while,
or unless you have the source code (i.e human-understandable equivalent code)

That said, you should have a general idea on how to modify apks.
One thing to note is that you must re-sign your apk after you've modified it and recompiled.
This is because installing the apk on Android requires the apk to be signed.
No idea why though. Just sign it with the test key.
There's a cool app on Google Play called Signapktic that signs your apks easily.

For those wishing to remove license verification,
most applications on Google Play use the framework provided by Google
WITHOUT ANY MODIFICATIONS.
Google's framework is really simple, the app basically checks the Play for a valid license,
then issues a response to the code that requested for it.
So what if we changed the response to a constant "valid" response?
Our application would work all the time! Even without an internet connection!

Under LicenseValidator.smali (smali code from second method), we can see

.field private static final ERROR_CONTACTING_SERVER:I = 0x101
.field private static final ERROR_INVALID_PACKAGE_NAME:I = 0x102
.field private static final ERROR_NON_MATCHING_UID:I = 0x103
.field private static final ERROR_NOT_MARKET_MANAGED:I = 0x3
.field private static final ERROR_OVER_QUOTA:I = 0x5
.field private static final ERROR_SERVER_FAILURE:I = 0x4
.field private static final LICENSED:I = 0x0
.field private static final LICENSED_OLD_KEY:I = 0x2
.field private static final NOT_LICENSED:I = 0x1

This defines the variables and their associated number (0xblah is a hex number. Google "hex".)

Under LicenseValidator.smali, we also find something like

.sparse-switch
0x0 -> :sswitch_d3
0x1 -> :sswitch_de
0x2 -> :sswitch_d3
0x3 -> :sswitch_11d
0x4 -> :sswitch_f3
0x5 -> :sswitch_101
0x101 -> :sswitch_e5
0x102 -> :sswitch_10f
0x103 -> :sswitch_116
.end sparse-switch

This is the smali equivalent of a java switch.
We can see that for each response, a unique activity is triggered.
To circumvent this, one just needs to call the "verified" activity
regardless of the response.
Since 0x0 (verified) calls sswitch_d3
We can just replace all other calls to sswitch_d3!

.sparse-switch
0x0 -> :sswitch_d3
0x1 -> :sswitch_d3
0x2 -> :sswitch_d3
0x3 -> :sswitch_d3
0x4 -> :sswitch_d3
0x5 -> :sswitch_d3
0x101 -> :sswitch_d3
0x102 -> :sswitch_d3
0x103 -> :sswitch_d3
.end sparse-switch

Regardless of what the response was from Google,
our application here will think that it is valid,
and continue to let you use the application.

Unfortunately, more and more applications on Play
are modifying the framework to make it harder to crack.
One way is to spread this license verification code along many classes.
Another way is to use their own licensing system.
Also, some applications do a crc check on itself (the apk).
This is harder to bypass as you have to identify the responsible code and nullify it.
And smali code is not that understandable.

There exists an app called Lucky Patcher which allows you to remove
license verification from apks installed with a click.
I still have no idea how it works, but it manages to bypass
the CRC check (I think). It can also remove Google Ads.
So yea check it out. Its cool.

Some apps are to date uncrackable. Well sort of.
Like Poweramp. Poweramp crack works by modifying the .dex file
and forcing the system to use the modified file instead of the apk
or something like that. Hence it will have to constantly keep it
unmodified or something (i.e. not standalone).

Oh well hope you had fun reading this. Bye!

YAY IM POSTING AGAIN YOU MOTHERFUCKERS.
NO ONE READS IT SO I DONT GIVE A SHIT.

MATH ASSIGNMENT 1 GOES HERE:
http://dl.dropbox.com/u/27763239/MA4112%20Assignment%201.pdf

HAVE FUN
CNY SUCKS.
WHY? TOO SHORT.
YES ITS LONGER THAN YOUR DICK JOSHUA.
AND YOUR MOM'S TOO.

BRACES ARE PAINFUL.
TOO MANY ULCERS.
GOTTA TAKE IT LIKE A MAN. WITH PAINKILLERS.
OKAY BYE.
I BE LISTENING TO JUSTIN BIBARREL.

oh fuck this world.
i'll go listen to david guetta and play some games.
selfpity wont do shiht and im better off enjoying every single bit of my youth
thanks alot

FUCK YEAH,
living the dream.

i wish nobody cared
it happened
now i wish everyone cared again.
i wanna stop caring about this world D:
its so tiring.

HI!
THE WORLD
NEED TO BE A BETTER PLACE(:

CAUSE RIGHT NOW IM SO BORED.

19 September is like one of the most important dates in the world.
ITS THE premiere date of "How I Met Your Mother" Season 7.
I should stop typing in caps right?

how i met your mother is like the most awesome show ever(:
HIMYM > ANIME > DRAMA > PORN > JASON

the big bang theory is awesome too. fringe is nice too but its a scifi thriller i think!
if im not wrong the rest of american shows just suck cause theyre female oriented or excessively male oriented.

oh yea i got braces. now i just have to prepare for ridicule and ulcers(:
AND EVIL DENTISTS D<
oh yea thank you braces. for each time the dentist tightens my braces, the next three days my diet gets limited to porridge, noodles and painkillers.

ANYWAY! HELL YEAH PHYSICS EXAM IS ON A TUESDAY I CAN WATCH HIMYM ^^

ALSO i declare today umbrella day!
TODAY IS THE DAY WE WORSHIP THE UMBRELLA
FOR IT SHELTERS THE SUN THE RAIN THE SPAGHETTI AND THE OCCASIONAL POTTED PLANT.
IT IS A SACRED TOOL USED BY THE GODS AND PASSED ON TO HUMANS
WHOEVER INVENTED THE UMBRELLA IS A GENIUS SURPASSING BOTH EINSTEIN AND LING

omg yay i can watch movies with my phone without re encoding it yayayayay
movies will take over manga for a short while (:
sorry manga!

i think i wanna learn how to cook. more.
at least i wont have to eat tasteless porridige ._.
or maybe i'll hire a chef/maid.
maids are supposed to know how to cook right?
nvm

stupid braces.

YES. I HAVE T3H POSTING SPIRIT.
WHICH LOOKS SOMETHING LIKE THIS:

YEAH. ITS ESCAPANG.
I DONT EVEN KNOW WHETHER THATS A WORD.

IN BREAKING NEWS,
ITS SO BLOODY WARM. RAGE.
GAHHHHhH

actually,
FUUUUUUCK.

and im so boreddddd

dead blog is dead.
kthxbai

lol its been like 1 month and 2 weeks since i posted and i sincerely doubt anyone would bother reading my crap everyday so yea.

so uhh.
last few weeks ive been playing minecraft and hacking a lot. got 2 accounts banned before i decided to take a break. yea and in the meantime im failing my cs (oh my god) cause im too stupid (mrs lee says i dont practice enough, but i think im just not cut for this kind of crap) yea

-redacted-
(cause it sounded so sexist)

and i should stop starting my paragraphs with 'so'
and i hope you guys like reading a giant chunk of white text(:

in the meantime, drive angry was an okay movie. but i find it kinda stupid. nicholas cage was in it so i thought perhaps this might be a good movie but yea its mainly a midnight movie for the guys and theres blood and stuffs. should be rated r21 but i think mda cut short a shitload of the parts and it became m18.

plot summary here
warning: spoilers

so yea remind me not to watch nicholas cage's movies unless its good.

fast and furious 5 was awesome. but the cam i got sucked. at some parts half the screen was cut off and stuff. still waiting for a better release.
do note that all of these movies are set before tokyo drift.. so han is still alive.
(:

the last part i found it abit unrealistic
SPOILERS.
the vault would not be able to stop cars dammit. its not possible for the two cars to pull at the vault with equal force at the same time ;x simple physics would tell you that. so if one car could move the vault why would they need two.

gahh nvm.

have a nice day peeps