DSi Homebrew possible using DSi store?

[Jiremi]

Hi, I'm new here. I had an idea about possibly running homebrew on the DSi through the DSi store. Here it is:

I've been messing around with my DSi and the DSi store. I hooked up a secondary wireless router to my computer that has 2 nics and captured the packets while the DSi browser was downloading. It looks like the DSi pulls the downloads via standard HTTP, and I was even able to download a file from a url I got from a packet. The file is called 00000000 (with no extension). I'm pretty sure this file contains the DSi browser. I copied the browser program from the DSi onto the memory card and it is almost the same size as the 00000000 file. The difference, is that in the file I copied off of the DSi, I can do a relative search in a hex editor and find strings that are in the DSi browser, such as "Opera". In the 00000000 file, I cannot find any strings from the browser, which leads me to believe it is encrypted and when the DSi downloads it, it is decrypted right on the system. I would like to decrypt the file, replace some strings, re-encrypt it, and put it on the DSi as a proof of concept, but I have no experience with encryption. I figure since I know the exact url of the file the DSi downloads, I might be able to run a rogue DNS server on my LAN and trick the DSi into downloading the modified file. I figure if I get something like that to work, it would open the door to homebrew without a flashcart because a homebrew launcher could be downloaded by tricking the DSi into thinking that it is downloading a Nintendo app from the DSi store. I have no experience with encryption, does anyone have any ideas on how to decrypt/re-encrypt the file?

If anyone wants to take a shot at the encryption, pm me. I have the file I pulled using the computer, the file copied from the DSi's internal memory, and the url I got the 00000000 file from.

One interesting thing I found while hexing the file: in the column that displays the text representation, towards the beginning of the file, there are symbols that look like they spell out "Voltage", I don't know if this is a coincidence or not. (I don't know if this will display right but the actual string was "VÓlt©ge")

By the way, while I was copying the browser app to the memory card, I noticed that the menu has the option to copy apps from the card to internal memory, but when I try to do it it won't let me. If anyone knows a way around this, I would love to know.

[slasher101]

Pm me the file and ill take a look.

[lilwayne1556]

pm me the file too

[Iconic_187]

I think this is the start in DSi Homebrew =D

[p0p0]

Well encryption isn't that easy. You need the proper encryption key and technique so that the DSi will be able to decrypt it. It isn't very often that encryption keys are found.

It might be done using a flashcart and the DSi to make the DSi encrypt a file itself. But I have no idea if it has those kinda capabilities anyway.

[near2shinigami]

can you please pm me the file too

[Bozzoc]

pm me the file pleez

[lute20]

I think this is the start in DSi Homebrew =D

Me to! I'm so excited! :Jump:

[Jiremi]

I seem to have misplaced the zip file that I had made when I first posted. I have made another one, this one also includes the file sets from Flipnote Studio and Photo Dojo. (The encrypted files from the DSi store downloaded using a computer, and the unencrypted files copied from system memory to a memory card). I think Nintendo changed the way they store text, however, because I can no longer find strings present in the games with a hex editor, even with relative search.

Another interesting note, when I first posted I only played around with the browser because that was the only free DSiWare. After playing around a bit more, I found that you should be able to copy programs both ways between the system memory and the memory card, you are just restricted with the DSi browser specifically for some reason. From what I see, Flipnote Studio and Photo Dojo don't have that kind of limitation. I also tried making changes to the files on the card and re-copying them to the system memory. As I can't make heads or tails of the hex code, I just changed some random values. These changes resulted in a "This software cannot be copied" error and no change to the files on the system. It looks to me like it checks in some way before copying.

One more interesting thing has to do with the DSi camera program: it will only display pictures created on the system. I was playing around with these "allowed" photos and a hex editor. I found that it somehow knows if the file has been modified. Even a change of one byte where the photo still displays on a computer will make it unreadable by the DSi. I even changed just the date string which isn't part of the displayed image, and that screwed it up too.

[samurai-of-death]

pm me the files

[samurai-of-death]

Thanks for the files I will check them out.

[pnupy]

pm me too

[Bryce12]

can you pm me the link,also? thx :P