Homebrew [RELEASE] OTPHelper - OTP dumping & downgrade helper

[Swiftloke]

@d0k3 OTPHelper is a success.
md5 of standard Plailect dumper: 136D2A67F5A314191CAED416B5E87395
md5 of OTPHelper dumper: 136D2A67F5A314191CAED416B5E87395
md5 [test 1] of OTPHelper 0x108 dumper: 026453B064C3F07572BE33777AA86E1E
md5 [test 2] of OTPHelper ox108 dumper: 026453B064C3F07572BE33777AA86E1E
Complete and total success. Was glad to test this program, you did a really good job. However, I would recommend having OTPHelper name the 0x108 dump as OTP0x108 so a user doesn't have to remove the SD card and change the name manually.

 

[d0k3]

@d0k3 OTPHelper is a success.
md5 of standard Plailect dumper: 136D2A67F5A314191CAED416B5E87395
md5 of OTPHelper dumper: 136D2A67F5A314191CAED416B5E87395
md5 [test 1] of OTPHelper 0x108 dumper: 026453B064C3F07572BE33777AA86E1E
md5 [test 2] of OTPHelper ox108 dumper: 026453B064C3F07572BE33777AA86E1E
Complete and total success. Was glad to test this program, you did a really good job. However, I would recommend having OTPHelper name the 0x108 dump as OTP0x108 so a user doesn't have to remove the SD card and change the name manually.

Thank you! As promised, you're mentioned in the op now. And good idea, this will be in the next release version. Any other ideas what could be changed to make this more streamlined?

 

[Plailect]

Plailect's guide doesn't seem to have a step #28 in section 2 or reference an "emuNAND_bricked.bin" anywhere. Where do I continue up to for testing the first thing?

There is no emunand_bricked.bin with this tool, it directly fixes the EmuNAND without wasting time dumping it.

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Thank you! As promised, you're mentioned in the op now. And good idea, this will be in the next release version. Any other ideas what could be changed to make this more streamlined?

Some people were having issues in IRC that they couldn't restore SysNAND from the EmuNAND bin. OTPHelper complained of no valid NAND backups, but Decrypt9WIP worked fine for restoring the same files.

 

[SomeGamer]

If I already have A9LH installed, can I downgrade to 2.1 sysNAND while keeping A9LH? (If you're asking why I'd do this: to do test #2! )

 

[TheReturningVoid]

There is no emunand_bricked.bin with this tool, it directly fixes the EmuNAND without wasting time dumping it.

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Some people were having issues in IRC that they couldn't restore SysNAND from the EmuNAND bin. OTPHelper complained of no valid NAND backups, but Decrypt9WIP worked fine for restoring the same files.

Ah, I see. I probably don't need to bother with testing the first item then.

 

[Swiftloke]

Thank you! As promised, you're mentioned in the op now. And good idea, this will be in the next release version. Any other ideas what could be changed to make this more streamlined?

Add a checking feature where the OTP is dumped and hashed, then compared to the hash of the OTP.bin/OTP0x108.bin. Furthermore, add separate 'stages' of the app to automate much of the process. It could go something like this:
Stage 0 [Prep, 3DSX format, sysNAND]
1. Dumps sysNAND & emuNAND to their respective files.
2. Installs tinyformat [in CIA format] on emuNAND and gives a message to launch & use it.
Stage 1 [Downgrading, CIA format, emuNAND]:
1. Checks md5 sum of all 2.1 CIA files in the /update/ folder.
2. Installs the CIA files if the md5's check out. [Reuse code from sysupdater maybe?] [Is this even necessary, because we are using emuNAND to ensure no title install fails?]
Stage 2 [Flashing/Dumping/Restoring, BIN format, sysNAND]
1. Checks system version.
If version is 9.2:
1. Dumps emuNAND as 'NAND2.1.bin' and flashes it to sysNAND.
If version is 2.1:
1. Dumps OTP & OTP0x108 to their respective files.
2. Dumps them into RAM and compares them with md5.
3. Restores sysNAND & emuNAND.
I dunno, this just seemed useful. If it's not, let me know and I'll delete it.

 

[Mistie]

Anyone know if otp0x108.bin is actually needed for anything? I did not grab it when I installed arm9loaderhax as there was no way to as far as I know. I have everything setup and my otp.bin backed up but am concerned that I may need to go through the whole process again because I didn't get that on my first run through.

 

[Frelia]

Anyone know if otp0x108.bin is actually needed for anything? I did not grab it when I installed arm9loaderhax as there was no way to as far as I know. I have everything setup and my otp.bin backed up but am concerned that I may need to go through the whole process again because I didn't get that on my first run through.

It might be used, it might not be. All we know is that if we do end up using it, you'd have to do the entire 2.x downgrading spiel again, so might as well tell newcomers to grab it.

 

[Mistie]

It might be used, it might not be. All we know is that if we do end up using it, you'd have to do the entire 2.x downgrading spiel again, so might as well tell newcomers to grab it.

Does anyone know if it would be possible to dump this without downgrading if we already have a9lh? Like could we boot directly into a dumper and dump or would it already be cleared then?

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@d0k3

 

[dark_samus3]

Does anyone know if it would be possible to dump this without downgrading if we already have a9lh? Like could we boot directly into a dumper and dump or would it already be cleared then?

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@d0k3

So far it hasn't been used for anything and looks like it won't ever be, since we can get all of the TWL stuff (which is the extra 0x8 on the end) from RAM afaik

 

[TheReturningVoid]

Does anyone know if it would be possible to dump this without downgrading if we already have a9lh? Like could we boot directly into a dumper and dump or would it already be cleared then?

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@d0k3

Sadly, no. The 3DS locks the OTP before arm9loaderhax starts.

 

[TheReturningVoid]

Is there any way to get into OTPHelper without the browser? The N3DS I'm currently working has a stuffed touch screen in some areas, and I can't get to the browser.

 

[dark_samus3]

Is there any way to get into OTPHelper without the browser? The N3DS I'm currently working has a stuffed touch screen in some areas, and I can't get to the browser.

Afaik, no... sorry

 

[TheReturningVoid]

Afaik, no... sorry

Oh no... this DS is stuffed if I can't get into the browser... Guess I better keep trying D:

 

[dark_samus3]

Oh no... this DS is stuffed if I can't get into the browser... Guess I better keep trying D:

try recalibrating the touchscreen, but calibrate it slightly off and see if you can get to the browser that way

 

[TheReturningVoid]

try recalibrating the touchscreen, but calibrate it slightly off and see if you can get to the browser that way

Yay it worked! That was a close one

 

[TheReturningVoid]

Anyone got a copy of Plailect's old OTP dumper for N3DS? I'm gonna see if I can compare the two dumps.

 

[dark_samus3]

Anyone got a copy of Plailect's old OTP dumper for N3DS? I'm gonna see if I can compare the two dumps.

it isn't Plailect's dumper (true it was the one in his guide) anyways, I think the old OTP guide is still up with it in it

 

[TheReturningVoid]

it isn't Plailect's dumper (true it was the one in his guide) anyways, I think the old OTP guide is still up with it in it

The guide's there, but the dumper isn't. He took it off.

 

[dark_samus3]

The guide's there, but the dumper isn't. He took it off.

here: https://mega.nz/#F!6EVwUQIa!gU3sjOfw8N2U4BZKu2pSLw (thanks @FenrirWolf)