Hacking DIY amiibo cards

[Julizi]

Page Byte 0 Byte 1 Byte 2 Byte 3
Page 0 UID 0 UID 1 UID 2 BCC 0
Page 1 UID 3 UID 4 UID 5 UID 6
Page 2 BCC 1

So, if I understood, this example is correctly described?

(Dump from original amiibo)

 

[SuperSVGA]

So, if I understood, this example is correctly described?

(Dump from original amiibo)

That's correct, except that last byte should xor out to be 11 so I'm not sure about it.

 

[dibas]

Something does not add up. BCC1 should not be 0x00. Is it stored at some other offset in the decrypted dump?

 

[Julizi]

In every decrypted amiibo dump I created the ninth UID byte is 00. I decrypted by Online amiibo API. Couldn't compile amiitool (windows User ).

 

[dibas]

My mistake, javiMaD already posted the offset for bcc1, it's the very first byte of the decrypted dump.

- Put BCC1 at offset 0x000 (1 byte)

 

[SuperSVGA]

Yeah it looks like page 2 gets moved to 0x00.

 

[Julizi]

That's correct, except that last byte should xor out to be 11 so I'm not sure about it.

My mistake, javiMaD already posted the offset for bcc1, it's the very first byte of the decrypted dump.

The first byte of that dump is indeed 11.

 

[aracom]

What hardware do you use to write? Smartphones won't work, right? Well, I guess I'm going to order a arduino NFC shield, could be useful for other projects.

 

[Deleted User]

Yay, another piece cracked. Can someone test if that was the issue? I ordered my tags from China so I have a while until I get them.

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What hardware do you use to write? Smartphones won't work, right? Well, I guess I'm going to order a arduino NFC shield, could be useful for other projects.

They will work, they just haven't had an app developed for them.

 

[SuperSVGA]

I might just develop a program for the arduino, I don't feel like dealing with Android API limitations.

 

[Pecrow]

i am so exited for this...... wish i knew how to help

 

[fiveighteen]

AmiiWrite doesn't work? I thought that was basically it's entire purpose.

@pokasmax posted it here: https://gbatemp.net/threads/save-and-restore-your-amiibos-on-android.403072/

You can clone the repo and compile it yourself: https://github.com/codlab/amiibo

 

[Deleted User]

It saves to the data section, and to a database there IIRC, so we cant do it how we need to

 

[Julizi]

Meh, if writing won't work on Android smartphone I need to buy an Arduino.

 

[SuperSVGA]

I'm not sure if I want to develop it for an NFC controller or use the Arduino as the controller with just an antennae attached. What do you guys think?

 

[fiveighteen]

I'm not sure if I want to develop it for an NFC controller or use the Arduino as the controller with just an antennae attached. What do you guys think?

I'd be willing to snag an Arduino and NFC shield. Been wanting one for future projects anyways.

 

[Deleted User]

That shield is what @_Tim_ used.

 

[SuperSVGA]

Yeah, I'm trying to decide between the PN532 and PN544. Might get both if I have the money.

 

[Julizi]

Please take the cheaper one. I can't afford everything.

 

[SuperSVGA]

The cheaper way would be to use just the Arduino. But that's also the much more difficult way.