<![CDATA[SoliForum - 3D Printing Community — XYZprinting Open Source NFC key calculator online: www.nfckey.xyz]]> https://www.soliforum.com/topic/16909/xyzprinting-open-source-nfc-key-calculator-online-wwwnfckeyxyz/ Tue, 21 Jan 2025 17:56:02 +0000 PunBB <![CDATA[Re: XYZprinting Open Source NFC key calculator online: www.nfckey.xyz]]> https://www.soliforum.com/post/157182/#p157182 diddelxi wrote:

https://www.soliforum.com/topic/19482/x … -released/

hi

I have a da vinci 1.0, follow the instructions in the pdf to install the xYZware Pro e, but it does not update the firmware, download to try your luck the zip xyzdav_f11_upgrade.zip but it has a password and you cannot test the bin it contains.

any ideas?
thank you

]]> Tue, 21 Jan 2025 17:56:02 +0000 https://www.soliforum.com/post/157182/#p157182 <![CDATA[Re: XYZprinting Open Source NFC key calculator online: www.nfckey.xyz]]> https://www.soliforum.com/post/156033/#p156033 https://www.soliforum.com/topic/19482/x … -released/

]]> Fri, 18 Oct 2024 20:39:15 +0000 https://www.soliforum.com/post/156033/#p156033 <![CDATA[Re: XYZprinting Open Source NFC key calculator online: www.nfckey.xyz]]> https://www.soliforum.com/post/155626/#p155626 Hi guys,

I'm going to get straight to the point so as not to annoy any of the pro's, and going to ask that whomever answers my question please understand that i am a complete and utter noob when it comes to resetting nfc chips... all i know is that i have a Da vinci mini w+, and that i have quite a bit of 3rd party filament with no nfc chip for my printer to read.

However... i am a quick study, am willing to do the reading and the learning and am fully capable of learning.

I need, and am requesting some sort of README intruction that will guide me step-by-step in using the hacks you guys have provided in order to reset my printers filament count.

PLEASE HELP?

Thank you for understanding and i look forward to learning and growing with this forum.

I am from Johannesburg, South Africa... so this type of technology is SO SUPER NEW to the country that there really isno other help resource i can dig into to help me with this problem.

Thank you so much,

Kind Regards,

ReazonzImAm

]]> Thu, 02 May 2024 17:27:29 +0000 https://www.soliforum.com/post/155626/#p155626 <![CDATA[Re: XYZprinting Open Source NFC key calculator online: www.nfckey.xyz]]> https://www.soliforum.com/post/155142/#p155142 Something went wrong. Code generated by https://nfckey.xyz/ for tag 044EE092784D81 (153BD15D) is not appropriate.
http://soliforum.com/i/?rHPhJWz.jpg
http://soliforum.com/i/?G9rNAYO.jpg
http://soliforum.com/i/?DeZsrxm.jpg

]]> Thu, 30 Dec 2021 21:19:13 +0000 https://www.soliforum.com/post/155142/#p155142 <![CDATA[Re: XYZprinting Open Source NFC key calculator online: www.nfckey.xyz]]> https://www.soliforum.com/post/154453/#p154453 Trypton wrote:

Hi everyone,

I am a newbie, so I need a total help on this. I have a DaVinci Jr and my NFC Tag went to 0 filament before actually consuming all the filament. So, I need to reset the filament length. Should I buy a new paper tag? Where can I Fin the UID and what exactly should I do then?

Sorry for the annoying questions.

You can refill the tag you have - but your printer will not accept it as it remembers each tag and the last length it saw.

You need a new (paper) tag to and read it to get the iD.
The ID is the first 7 bytes.
All 4 from the first page
then the first 3 from the next page.

The ID will be unique to that tag.

]]> Tue, 26 Jan 2021 10:21:33 +0000 https://www.soliforum.com/post/154453/#p154453 <![CDATA[Re: XYZprinting Open Source NFC key calculator online: www.nfckey.xyz]]> https://www.soliforum.com/post/154452/#p154452 Hi everyone,

I am a newbie, so I need a total help on this. I have a DaVinci Jr and my NFC Tag went to 0 filament before actually consuming all the filament. So, I need to reset the filament length. Should I buy a new paper tag? Where can I Fin the UID and what exactly should I do then?

Sorry for the annoying questions.

]]> Mon, 25 Jan 2021 20:02:52 +0000 https://www.soliforum.com/post/154452/#p154452 <![CDATA[Re: XYZprinting Open Source NFC key calculator online: www.nfckey.xyz]]> https://www.soliforum.com/post/154163/#p154163 is the UID the password or the KEY the password?
I still can not get into the tag
it only showing [00] to [07]
[00] 0406951F
[01] 2AB44281
[02] 5D480000

]]> Fri, 30 Oct 2020 12:24:49 +0000 https://www.soliforum.com/post/154163/#p154163 <![CDATA[Re: XYZprinting Open Source NFC key calculator online: www.nfckey.xyz]]> https://www.soliforum.com/post/154158/#p154158 is the UID the password or the KEY the password?
I still can not get into the tag
it only showing [00] to [07]
[00] 0406951F
[01] 2AB44281
[02] 5D480000

]]> Thu, 29 Oct 2020 19:18:38 +0000 https://www.soliforum.com/post/154158/#p154158 <![CDATA[Re: XYZprinting Open Source NFC key calculator online: www.nfckey.xyz]]> https://www.soliforum.com/post/154069/#p154069 hi nilezon！

I have an XYZ 2.0 DUO printer. Due to the encryption of xyz consumables, I cannot use open source consumables. Can your NFC key software crack the chip of consumables?

thanks！

]]> Mon, 21 Sep 2020 01:35:40 +0000 https://www.soliforum.com/post/154069/#p154069 <![CDATA[Re: XYZprinting Open Source NFC key calculator online: www.nfckey.xyz]]> https://www.soliforum.com/post/153874/#p153874 nilezon wrote:

I bought a new printer and will soon be leaving this great community.
I'm giving my da Vinci miniMaker Special Edition away to anyone who wants it. It comes soldered with JTAG access port from my hacking sessions.
I live in Sweden and I prefer not having to ship it outside Europe, if possible.

I will of course keep nfckey.xyz online for the years to come.

I would love to take care of it! I live in Sweden smile

]]> Wed, 12 Aug 2020 20:24:01 +0000 https://www.soliforum.com/post/153874/#p153874 <![CDATA[Re: XYZprinting Open Source NFC key calculator online: www.nfckey.xyz]]> https://www.soliforum.com/post/153860/#p153860 I bought a new printer and will soon be leaving this great community.
I'm giving my da Vinci miniMaker Special Edition away to anyone who wants it. It comes soldered with JTAG access port from my hacking sessions.
I live in Sweden and I prefer not having to ship it outside Europe, if possible.

I will of course keep nfckey.xyz online for the years to come.

]]> Mon, 10 Aug 2020 17:51:41 +0000 https://www.soliforum.com/post/153860/#p153860 <![CDATA[Re: XYZprinting Open Source NFC key calculator online: www.nfckey.xyz]]> https://www.soliforum.com/post/152617/#p152617 Is there a way to do this on iPhone?

]]> Sun, 23 Feb 2020 02:52:46 +0000 https://www.soliforum.com/post/152617/#p152617 <![CDATA[Re: XYZprinting Open Source NFC key calculator online: www.nfckey.xyz]]> https://www.soliforum.com/post/152334/#p152334 nilezon wrote:

Maybe they used a simple key for the firmware encryption as well?

No they don't. I have figured out the private AES 256Bit Key. It's per "Type Key" and stored packed or scrambled in the firmware.

So each printer type have same key. (At this point crossflashing is not possible with original encryption firmware).
But downgrading is now possible at any time.


I don't know if I can post more about this here?!?

]]> Fri, 10 Jan 2020 17:16:18 +0000 https://www.soliforum.com/post/152334/#p152334 <![CDATA[Re: XYZprinting Open Source NFC key calculator online: www.nfckey.xyz]]> https://www.soliforum.com/post/152330/#p152330 That's interesting. Almost embarrassing actually :-)
I have no idea why they used a "known" key. Maybe they just copy-pasted the code from this paper:
https://www.elixirpublishers.com/articl … -10703.pdf

Maybe they used a simple key for the firmware encryption as well?

modfreakz wrote:
nilezon wrote:

Good find!
I did see a key expansion algorithm but I didn't bother to "decode" it.
Also, I did see some unreachable code in the key/pack assembler, so I figured they used some standard algorithm, but I didn't understand it was RC5. Instead I tried to simplify the code as much as possible, removing the unused code and using the expanded integers.



Hi nilezon,

Just for the record. ;-) Finally I can confirm that the the PASS and PACK generation use RC5 enryption with the key "915F4619BE41B2516355A50110A9CE91"

One thing I down understand, why they used that good know Key??
If you google for it, you will find a lot hits.



so in C# I do it like this:

private static byte[] Magic_RC5_Key = { 0x91, 0x5F, 0x46, 0x19, 0xBE, 0x41, 0xB2, 0x51, 0x63, 0x55, 0xA5, 0x01, 0x10, 0xA9, 0xCE, 0x91 };

        static InitNfcKey()
        {
            // initialization with our key
            CryptoRC5.RC5Engine.RC5_Init(Magic_RC5_Key);
        }

        public static Byte[] GetPASS(Byte[] uid)
        {

            // Buffer for rotated UID
            byte[] buffer_In = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };


            //-- Part 1 -------------------------------------//
            // calculate rotation offset
            int rot_offset = ((uid[1] + uid[3] + uid[5]) & 7);

            // rotate the UID
            for (uint i = 0; i < 7; i++)
                buffer_In[(i + rot_offset) & 7] = uid[i];


            //-- Part 2 -------------------------------------//

            // call RC5 Encryption
            byte[] buffer_Out = CryptoRC5.RC5Engine.RC5_Encrypt(buffer_In);


            //-- Part 3 -------------------------------------//
            //Calc PASS
            long PASS = 0; //Key as int
            
            // calculate rotation offset
            rot_offset = ((buffer_Out[0] + buffer_Out[2] + buffer_Out[4] + buffer_Out[6]) & 3); 
            
            for (uint i = 0; i < 4; i++)
                PASS = (buffer_Out[i + rot_offset] & 0xFF) + (PASS << 8);


            return BitConverter.GetBytes(PASS);
        }

        public static Byte[] GetPack(Byte[] uid)
        {
            // Buffer for rotated UID
            byte[] buffer_In = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
            
            //-- Part 1 -------------------------------------//
            // calculate rotation offset
            int rot_offset = ((uid[2] + uid[5]) & 7);

            // rotate the UID
            for (uint i = 0; i < 7; i++)
                buffer_In[(i + rot_offset) & 7] = uid[i];


            //-- Part 2 -------------------------------------//
            // call RC5 Encryption
            byte[] buffer_Out = CryptoRC5.RC5Engine.RC5_Encrypt(buffer_In);


            //-- Part 3 -------------------------------------//
            //Calc PACK
            long PACK = 0;

            for (uint i = 0; i < 8; i++)
                PACK = ((buffer_Out[i] & 0xFF) * 13) + PACK;


            Byte[] packBytes = BitConverter.GetBytes((PACK & 0xFFFF) ^ 0x5555);

            return (new Byte[2] { packBytes[0], packBytes[1] });
        }
]]> Fri, 10 Jan 2020 09:52:44 +0000 https://www.soliforum.com/post/152330/#p152330 <![CDATA[Re: XYZprinting Open Source NFC key calculator online: www.nfckey.xyz]]> https://www.soliforum.com/post/152319/#p152319 Tags and the Nano. I have tried both software programs and the tags appear to create properly. However,  thee tags do nit work with my Nano. The printer will read the temp and quantity (200) that I  entered but will not work. Do the tag programs apply to the Nano?

]]> Wed, 08 Jan 2020 13:04:42 +0000 https://www.soliforum.com/post/152319/#p152319