ROM Hack Does anyone know how to decrypt CIA files?

[laramie]

I have been looking around everywhere and I just want to fully decrypt a CIA game. Any advice?

 

[zecoxao]

i don't think CIA files are encrypted. they're just a compressed package i guess...
decompress it with makerom tool
makerom -ciatocci path_to_cia

 

[laramie]

i don't think CIA files are encrypted. they're just a compressed package i guess...
decompress it with makerom tool
makerom -ciatocci path_to_cia

I just threw it in the decryption folder, and opened a CMD window there, typed in" makerom -ciatocci_savedatafiler.cia" and got " [SETTING ERROR] Unrecognised argument '-ciatocci_savedatafiler.cia'
[RESULT] Invalid arguments, see 'makerom -help' "

 

[zecoxao]

Unrecognised argument '-ciatocci_savedatafiler.cia'
[RESULT] Invalid arguments, see 'makerom -help' "

looks like you entered the argument together with the input.

 

[laramie]

looks like you entered the argument together with the input.

Okay, I tried just inputting the command you typed, " makerom -ciatocci path_to_cia" and it said, " [MAKEROM ERROR] Failed to open: path_to_cia " why does it say it can't find the path?

 

[zecoxao]

because you didn't specify the correct input...
it's not hard lol
makerom -ciatocci _savedatafiler.cia
that should do it, i think

 

[laramie]

because you didn't specify the correct input...
it's not hard lol
makerom -ciatocci _savedatafiler.cia
that should do it, i think

I've tried that one, I thought that's what it was suppose to be at first but I got this error code; " [MAKEROM ERROR] Failed to open: _savedatafiler.cia "

 

[Vappy]

I've tried that one, I thought that's what it was suppose to be at first but I got this error code; " [MAKEROM ERROR] Failed to open: _savedatafiler.cia "

Is _savedatafiler.cia the filename of the cia you want to decrypt?

 

[laramie]

The name is "savedatafiler" and the extension is .cia

 

[Vappy]

So then try again without the underscore

 

[gudenau]

Some CIAs are encrypted, from update CDN for example.

 

[Asia81]

It's workin without undescore.
but he convert the cia to cci, and rename it to 3ds

How to extract data ?

 

[laramie]

Some CIAs are encrypted, from update CDN for example.

What's the CDN?

 

[laramie]

It's workin without undescore.
but he convert the cia to cci, and rename it to 3ds

How to extract data ?

Yeah, My goal is to fully decrypt this cia file, in which case is the SDF, so I can learn exactly how it works and hopefully with a lot of work, and of course a lot of hours sobbing mathematically, I can implement a save process that's not only backwards compatible with the current sate, but also to be able to extract the raw saves of saves that have experienced the 7.x save encryption.

 

[laramie]

This is the result from renaming the "cci" to "3ds" https://www.dropbox.com/s/ry39gyhj1tts81r/IMG_20150306_173101.jpg?dl=0
The blank one is suppose to be the savedatafiler in 3ds format, and when I select it, it just shows a blank game. No music, pictures, I can't select to play it...

 

[cearp]

i don't think CIA files are encrypted. they're just a compressed package i guess...
decompress it with makerom tool
makerom -ciatocci path_to_cia

i don't think there is compression. they are encrypted, unless they are user repacked without encryption

 

[zecoxao]

i don't think there is compression. they are encrypted, unless they are user repacked without encryption

well, most of the cias i found online, i could easily obtain the decrypted cci from then, so i'm just speaking with my own experience.
of course it can be different from what i think

 

[cearp]

well, most of the cias i found online, i could easily obtain the decrypted cci from then, so i'm just speaking with my own experience.
of course it can be different from what i think

no, you are correct, many cias online are done a bit cheaply and hacky (in my opinion) - that is why they don't have encryption
but my tool (FunkyCIA) makes cias in a more clean standard way, and the original files are left intact, encrypted
if we ever get any real cias straight form nintendo themselves (like the sdk dev tools) they are encrypted

 

[laramie]

no, you are correct, many cias online are done a bit cheaply and hacky (in my opinion) - that is why they don't have encryption
but my tool (FunkyCIA) makes cias in a more clean standard way, and the original files are left intact, encrypted
if we ever get any real cias straight form nintendo themselves (like the sdk dev tools) they are encrypted

So then is there anyway to decrypt them? I'd imagine it'd be just like decrypting a 3ds rom, but I thought if I couldn't decrypt it in cia form, I could convert it into a 3ds format and decrypt it like a game...

 

[Vappy]

Yeah, My goal is to fully decrypt this cia file, in which case is the SDF, so I can learn exactly how it works and hopefully with a lot of work, and of course a lot of hours sobbing mathematically, I can implement a save process that's not only backwards compatible with the current sate, but also to be able to extract the raw saves of saves that have experienced the 7.x save encryption.

The .csu versions of the dev tools from the BigBlueBox pack are all already decrypted, and .csu virtually identical to .cci/.3ds, just with a different file extension. You can extract their contents without any decryption process needed.