Hacking Obtaining otp.bin from sysnand a9lh backup

[75mak]

ok, to cut a long story short.... my sd card got corruptted and needs to be formatted.

I have a9lh installed. I can boot up and make a backup of the a9lh sysnand.

As i want a copy of the otp.bin file which was lost on the sd card, I would like to know if there is any way apart from downgrading to 2.1, I can obtain the otp.bin ?

 

[yusuo]

short answer, no

 

[Deleted member 381889]

ok, to cut a long story short.... my sd card got corruptted and needs to be formatted.

I have a9lh installed. I can boot up and make a backup of the a9lh sysnand.

As i want a copy of the otp.bin file which was lost on the sd card, I would like to know if there is any way apart from downgrading to 2.1, I can obtain the otp.bin ?

I think you might need to downgrade to 2.1. The OTP isn't stored on the NAND, afaik.
Also, this is why you make backups of your otp. To your PC, to mega, everywhere and anyway.

 

[75mak]

i've recovered the old otp.bin file from the corrupted sd card.....


is there any way to check if it's good.... ?

 

[proflayton123]

i've recovered the old otp.bin file from the corrupted sd card.....


is there any way to check if it's good.... ?

https://gbatemp.net/threads/release-otphelper-otp-dumping-downgrade-helper.416996/

 

[75mak]

https://gbatemp.net/threads/release-otphelper-otp-dumping-downgrade-helper.416996/

what exactly would i do with that?
I have a9lh installed and can make a sysnand backup.
I have an otp.bin file.... is just want to check if it's good and not corrupted. it is just for future reference.

 

[Seriel]

If you have a9lh installed there is no reason why you would need otp.bin again.
Just saying.

 

[75mak]

If you have a9lh installed there is no reason why you would need otp.bin again.
Just saying.

even if i wanted to upate to any future versions of a9lh? like a9lh v2?

 

[Seriel]

even if i wanted to upate to any future versions of a9lh? like a9lh v2?

Yup.
Mine got lost and I updated fine.

--------------------- MERGED ---------------------------

You need to update a9lh from within a9lh and it's all fine.

 

[Deleted member 381889]

what exactly would i do with that?
I have a9lh installed and can make a sysnand backup.
I have an otp.bin file.... is just want to check if it's good and not corrupted. it is just for future reference.

Is it 256 bytes?

 

[Seriel]

Is it 256 bytes?

Even if it is 256 bytes it might still be corrupted.
I was aware there was a tool for a9lh that let you dump the hash of the otp?
Which you could then use to verify if this is the right one?

Just keep in mind that you will never need the otp again so uh, there's not much reason to get it back.

 

[75mak]

ok.... that's great.

thanks

 

[Deleted member 381889]

Even if it is 256 bytes it might still be corrupted.
I was aware there was a tool for a9lh that let you dump the hash of the otp?
Which you could then use to verify if this is the right one?

ik, but if it's not 256 bytes, you done fucked up.
Also I don't think that's impossible, as a9lh boots after the locking of the otp.

 

[Seriel]

Also I don't think that's impossible, as a9lh boots after the locking of the otp.

I heard it said somewhere.
Lemme gooogle...
uh, can't find it.
i dunno, find someone who knows

 

[Deleted member 381889]

I heard it said somewhere.
Lemme gooogle...
uh, can't find it.
i dunno, find someone who knows

It wouldn't be possible. The 3ds locks the otp before a9lh is loaded.

 

[Seriel]

It wouldn't be possible. The 3ds locks the otp before a9lh is loaded.

ya but apprently you could get the hash somehow, or something.
i dont know
*shameless tagging of someone who might know more about it than me @astronautlevel *

 

[ihaveahax]

It wouldn't be possible. The 3ds locks the otp before a9lh is loaded.

no, arm9loader locks the OTP. if the bootrom did it, we wouldn't be able to get it going to 2.1.

 

[Deleted member 381889]

no, arm9loader locks the OTP. if the bootrom did it, we wouldn't be able to get it going to 2.1.

Sorry, you're right. But I'm pretty sure you still can't get it even with a9lh.

 

[ihaveahax]

Sorry, you're right. But I'm pretty sure you still can't get it even with a9lh.

no, because arm9loader locks it before it jumps to the firmware/payload. at best you can get a hash of it.

 

[EmuAGR]

You can get the OTP hash from N3DS only.