Hacking DIY amiibo cards

[Mazamin]

no, none atm.

Are you saying that I can't write to a blank ntag215 with an android phone with nfc?

 

[Deleted User]

Not the Amiibo dump, no, because no-one's made an Android app to do so.

 

[Mazamin]

Not the Amiibo dump, no, because no-one's made an Android app to do so.

Ok thanks

 

[nurofen]

Ok thanks

I think I have a way of writing to a tag using android, however I haven't got my head around the final encrypting stage yet, so it if of no use.

 

[Mazamin]

I think I have a way of writing to a tag using android, however I haven't got my head around the final encrypting stage yet, so it if of no use.

Please tell me the way

 

[SuperSVGA]

I might have a way to do it but I have no blank tags to test it.

 

[Julizi]

I haven't got my head around the final encrypting stage yet,

I thought SuperCool figured it out, did'nt he?

I'm not actually comfortable posting code to do this (don't want to get in trouble with anybody, and the previous code I posted is really just a python port of amiitool with some added nfc stuff). The missing piece however is in fact using the locked secret keys to generate another derived keyset, and then using the hmac key from that keyset to hash the last two pieces hashed for the key at 0x80 (0x00 to 0x08 and 0x54 to 0x80). I actually just guessed this, and it was essentially my first guess after I thought to use the locked secret keys. I'll let somebody else write up the final code and share it.

 

[rena2019]

I thought SuperCool figured it out, did'nt he?

yes, we all are waiting for his next post ;-)

 

[Mazamin]

So if I buy this, will I be able to write an amiibo on it and overwrite it with another one?

 

[aracom]

So if I buy this, will I be able to write an amiibo on it and overwrite it with another one?

No, it'll be exactly like a normal amiibo. You won't be able to rewrite it.

 

[Mazamin]

No, it'll be exactly like a normal amiibo. You won't be able to rewrite it.

So... Is this wrong?

 

[javiMaD]

So... Is this wrong?

It's ok, but read this "An NFC tag can be rewritten an infinite number of times until it is locked or physically damaged..."
For clone an Amiibo you need to set the lock bits, then the locked areas can't be rewritten

 

[Mazamin]

It's ok, but read this "An NFC tag can be rewritten an infinite number of times until it is locked or physically damaged..."
For clone an Amiibo you need to set the lock bits, then the locked areas can't be rewritten

Ok now it's clear

 

[Deleted User]

BTW guys, the amiitool writer had to stop amiicli.sh. Now, there's a HTTP POST API. http://www.socram.ovh/amiibo/

 

[nurofen]

I thought SuperCool figured it out, did'nt he?

"The missing piece however is in fact using the locked secret keys to generate another derived keyset, and then using the hmac key from that keyset to hash the last two pieces hashed for the key at 0x80 (0x00 to 0x08 and 0x54 to 0x80)"

Unfortunately I don't really understand this, I have a kind of idea of what this means, but not enough to code anything.

 

[Pecrow]

i ordered my ntag215s a few days back, should be here in 2-3 weeks [costa rica] hopes are high ;-]

 

[gudenau]

So, @_Tim_ any links to where I could get some tags?

 

[Pecrow]

So, @_Tim_ any links to where I could get some tags?

I got some of these: http://www.amazon.com/Ntag-215-Blank-White-Cards/dp/B00XWCQO8A which will go very nice with the custom amiibo-ar_card format images that I posted earlier on this topic for everyone to download

 

[Bug_Checker_]

I got some of these: http://www.amazon.com/Ntag-215-Blank-White-Cards/dp/B00XWCQO8A which will go very nice with the custom amiibo-ar_card format images that I posted earlier on this topic for everyone to download

Wow either they are incompetent or some buyer is in for a "not so nice" surprise. Or both.
"888 usable bytes of data"

 

[Pecrow]

Wow either they are incompetent or some buyer is in for a "not so nice" surprise. Or both.
"888 usable bytes of data"

how come?

--EDIT--

I had seen a previous post stating that they were fine to get/use