Homebrew [WIP] SafeSysUpdater

[cpasjuste]

Hi,

Since some people seems to wait for a safer downgrader, i did one in a few hours. This is a fork of sysupdater, with a few things added which should prevent some errors (wrong region downgrade pack, corrupted downloads...) :

- automatically load update information (needed files, md5) based on your 3ds model and region
- md5 check all the cia update files before downgrading
- can check your update files without actually downgrading

To use it you have to :

- Put SafeSysUpdater.3dsx somewhere you can launch it...
- Put your downgrade pack as usual ("/updates/*.cia")
- Launch it multiple times until it pass the black screen (hax)...
- Pray

• DOWNGRADE PROCESS IS NEVER 100% SAFE
• BE SURE TO REMOVE THE UPDATE NAG BEFORE DOWNGRADING : HERE
• SOME TIPS TO PREVENT A BRICK : HERE

Notes:
- If it freeze just after you press (Y) to downgrade or "init ->" more than 1 second, restart..
- The 9.2 JPN package is in fact a 9.1 package, no problem with this..

Changes :
- v1.0: add new hax for FW > 10.3
- v1.0: downgrade browser and homemenu last (but before native_firm)
- v1.0: few bug fix and improvements
- v09: add downgrade logs ("/SafeSys.log")
- v09: only md5 check downgraded files
- v09: remove sysupdater dependency
- v08: fix JPN files path..
- v07: finally fixed the input freeze... by removing this second confirmation screen.
- v06: try to fix input freeze... again
- v05: minor input fix
- v04: added japan support (with bad title skipping)
- v03: big improvement in hax success rate
- v02: Add simulation mode to check your update files without actually downgrading
- v01: Removed the config files, just put the ".3dsx" file somewhere and downgrade... and pray.
- v01: Added a CIA version to downgrade from emunand so you don't need to try hard to get the hax to succeed (so it's just for testing/reporting bugs). Testing this will ensure the MD5 for each regions/models (only o3DS/n3DS USA/EUR for now) and downgrade process is correct/working. Thanks for reports !

Credits:
- profi200 for sysUpdater
- @Steveice10 and all people involved for memchunkhax2

Source code : https://github.com/Cpasjuste/SafeSysUpdater

 

[Coleman_C18]

Solid work man, I'm already downgraded but these safety checks should be good at stopping most User-Errors
Way to step up and seize the opportunity haha.

 

[cpasjuste]

Solid work man, I'm already downgraded but these safety checks should be good at stopping most User-Errors
Way to step up and seize the opportunity haha.

Thanks. You know why i did this isn't it

 

[Damon_girl]

I was just about to downgrade until I saw this, so I think I'll wait until it's okay to use this instead!

 

[cpasjuste]

I was just about to downgrade until I saw this, so I think I'll wait until it's okay to use this instead!

I think it can be a good idea. If people with an hardmod confirm that it does work correctly, then it will be (a little) safer to use this. But for now it's not

 

[Coleman_C18]

Avenge me @cpasjuste and use this as your boot icon.

 

[kje123]

Maybe people will shut up about KTM after this is released. (Probably not )

Seriously tho, godspeed man.

 

[Aahz]

This is exactly what the downgrade process needs as the very heart of it involves magically acquiring files via nudges and winks.

 

[Damon_girl]

I think it can be a good idea. If people with an hardmod confirm that it does work correctly, then it will be (a little) safer to use this. But for now it's not

Great!! Also, I have a quick question. I'm downloading 9.20.0U(full).zip for my O3DS. Is it supposed to be roughly 11GB in size because my computer says that it is.

 

[Coleman_C18]

Great!! Also, I have a quick question. I'm downloading 9.20.0U(full).zip for my O3DS. Is it supposed to be roughly 11GB in size because my computer says that it is.

O_O 11GB?! Try somewhere in the 300mb range

Edit: 120mb range*

 

[DarkenedMatter]

It's a shame I already downgraded via the unsafe method. Plus I don't have a hardmod or else I would try.

 

[Harps]

Both my O3DS and my friend's O3DSXL have been downgraded already but since I was going to get a 2DS to fuck around with (hardmod, etc) I think I'll definitely give this a try

 

[Damon_girl]

O_O 11GB?! Try somewhere in the 300mb range

I thought so. My zip file says system.zip so I must not be doing this right.

 

[DKB]

O_O 11GB?! Try somewhere in the 300mb range

More like 120MB range. Haha. 11GB is insane.

Also, nice work on this OP.

 

[cpasjuste]

I thought so. My zip file says system.zip so I must not be doing this right.

The "9.2.0-20U(Full).zip" is around 173Mb. The thing is if you don't have the correct files you won't brick with this as it won't let you downgrade without the correct files. (but still needs to be tested by hardmod's before)

 

[Damon_girl]

The "9.2.0-20U(Full).zip" is around 173Mb

Got it fixed! So the question is...should I go ahead and downgrade or wait for safesysUpdater to be finished?

 

[cpasjuste]

Got it fixed! So the question is...should I go ahead and downgrade or wait for safesysUpdater to be finished?

You need to wait for people to report (or you can use the normal sysupdater if you are sure of your files, it will be safer for now). For me it's ready, but it may have some bugs i didn't spot...

 

[Damon_girl]

You need to wait (or you can use the normal sysupdater if you are sure of your files, it will be safer for now).

Definitely waiting then! I hope we'll be alerted when this is done.

 

[Damon_girl]

Where did you download that? If you had a problem with the file size, please, triple-check if they're the correct files. The current tools shouldn't brick by themselves... But with the wrong files it's guaranteed brick.

I got the mega link off of youtube since I couldn't find it on that site that I went to. It has 127 files in the zip folder. Is that the correct amount, or is it supposed to be 130?

 

[Pikasack]

I got the mega link off of youtube since I couldn't find it on that site that I went to. It has 127 files in the zip folder. Is that the correct amount, or is it supposed to be 130?

If it has a folder named updates and 126 files in it, that looks like it.

Scan the MD5 and compare it to this list.

Spoiler: Checksums

O3DS 9.2.0-20U:
MD5: 879f437d7c78f09ae565f79f5aa9c421
SHA-1: ccc272c495a84aa49f8db2da6072a79a73053e19
O3DS 9.2.0-20E:
MD5: caec3e015bc065dd0ca512f219c8fc3c
SHA-1: 63f0e83892af0f43d159685b4d775e09360552e4
O3DS 9.2.0-20J:
MD5: a7c14f50e553d99d93efd3a8dd4f8b9d
SHA-1: 422af53b07c270d65bf443d09736f3d1c540641c

N3DS 9.2.0-20U:
MD5: e5f40c3b155cfd12ef38be35d2e81d2e
SHA-1: 377c140377fb6cf31a0c032c4e1196cc521f87fe
N3DS 9.2.0-20E:
MD5: 6dcca8fcbc9a28c82c2a4e5182f3acf8
SHA-1: e7c77bf205137167f1f1befa0c4db9d879a21a2e
N3DS 9.2.0-20J:
MD5: f46677696ed4bf0e182de5a8168b7542
SHA-1: c9a1aaf4a4923fb5e065546da5c4a4da37aafdb2