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#351 2015-10-02 21:57:41

mariolino
Contributor
Registered: 2014-04-27
Posts: 47

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Hi ikarus,
I used your great tool many times on my Sony Xperia Z but, after the lollipop upgrade,  the mct mifare classic tool doesn't work with Mifare Mini ATQA 00 04 SAK 9
1443819265_screenshot_2015-10-02-22-03-22.jpg

i would like inform you that it worked properly on Android 4.4.4 KitKat.
I used your sw to program the TAG on the screenshot.
How can be fixed the issue on new lollipop Android version 5.1.1?

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#352 2015-10-06 19:25:28

ikarus
Contributor
Registered: 2012-09-20
Posts: 249
Website

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Hi tontol1,

your work on "raw" ISO14443 messages is quite interesting.

tontol1 wrote:

Probably it can still be useful for doing cryptanalysis of underneath crypto algorithms, since AUTH commands are byte oriented.

This sounds especially interesting. It would be super cool to crack Mifare Classic keys from a simple Android device!
I'm looking forward to hear from your progress!

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#353 2015-10-06 19:45:37

ikarus
Contributor
Registered: 2012-09-20
Posts: 249
Website

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Hi mariolino,

mariolino wrote:

Hi ikarus,
I used your great tool many times on my Sony Xperia Z but, after the lollipop upgrade,
the mct mifare classic tool doesn't work with Mifare Mini ATQA 00 04 SAK 9

First of all, parts of this are good news to me wink
I never tried Mifare Mini with MCT. I don't own a mini tag.
Good to know it works!

Now to the bad part:
It is very likely that Sony screwed up. A lot of manufacturers did when it comes
to Mifare Classic and Android 5.+. You can have a look at the two issues that
had already been fixed: #52 and #64. Unfortunately, fixing issues like this is
really annoying.

You can try the usual stuff first before we look deeper into this.
Try out other apps to find out if it's an issue with MCT or Mifare in general (see this)
Also "bildin" (from github) has developed a app to hunt issues like this down.
But I think he didn't publish it...

I've created a issue on github. Lets try to keep the bug/issue related discussion there.

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#354 2015-10-06 23:03:42

mariolino
Contributor
Registered: 2014-04-27
Posts: 47

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

ikarus wrote:

Hi mariolino,

mariolino wrote:

Hi ikarus,
I used your great tool many times on my Sony Xperia Z but, after the lollipop upgrade,
the mct mifare classic tool doesn't work with Mifare Mini ATQA 00 04 SAK 9

First of all, parts of this are good news to me wink
I never tried Mifare Mini with MCT. I don't own a mini tag.
Good to know it works!

Now to the bad part:
It is very likely that Sony screwed up. A lot of manufacturers did when it comes
to Mifare Classic and Android 5.+. You can have a look at the two issues that
had already been fixed: #52 and #64. Unfortunately, fixing issues like this is
really annoying.

You can try the usual stuff first before we look deeper into this.
Try out other apps to find out if it's an issue with MCT or Mifare in general (see this)
Also "bildin" (from github) has developed a app to hunt issues like this down.
But I think he didn't publish it...

I've created a issue on github. Lets try to keep the bug/issue related discussion there.

Dear ikarus, thanks for your quick reply and I want give you a good news for your App..... The Mifare Mini issue comes from the Android Lollipop upgrade for all Apps.
I also used the RFID NFC Tool App, and the issue is present only after the Amdroid upgrade.....
We must search the problem on Lollipop cool

Regarding the mifare hack using the Android, some guys can start fron this gthub
https://github.com/ehabkost/nfc-tools

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#355 2015-10-10 13:53:30

tontol1
Member
Registered: 2015-09-26
Posts: 3

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Hi Ikarus,
after some work I was able to force MC tag into partial authentications using my test code.
Due to the famous NACK bug  (see "THE DARK SIDE OF SECURITY BY OBSCURITY" and others ) this was just enough to gather enough information to do an "offline" brute force attack.
Since brute force attack is very CPU intensive it cannot be done a mobile device. On modern laptop it requires a lot of days to get a single key.
Nevertheless it is possible, not very fast ... but possible. tongue

To speed-up hacking it's necessary to be able to sync queries with PRNG timing. This is not easy using Java Android api (my way), since Java is not very predictable during execution. C code is much better with this task.
For this reason I think that project nfc-tools (suggested by Mariolino) looks like promising. Maybe with some effort (how big?!) it could be completed and be usable.

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#356 2015-10-13 05:08:41

timmyjane
Contributor
Registered: 2015-08-26
Posts: 12

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Any thoughts on why my htc m8 continuously loses connection?

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#357 2015-10-22 19:28:15

gpagliaroli
Member
Registered: 2015-03-28
Posts: 2

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

I have a phone Samsung S3 Neo, in which all commands for a Mifare Classic card works, but the commands do not work on use of blocks of value. They know that this is due? or am I doing something wrong?
Thank you.

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#358 2015-10-22 21:41:20

mariolino
Contributor
Registered: 2014-04-27
Posts: 47

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

gpagliaroli wrote:

I have a phone Samsung S3 Neo, in which all commands for a Mifare Classic card works, but the commands do not work on use of blocks of value. They know that this is due? or am I doing something wrong?
Thank you.

Unfortunately the Samsung S3 Neo use the NFC broadcom chip and it doesn't compatible with NXP tags.
You can buy the old S3 model, it was fully working :-)

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#359 2015-10-22 22:49:30

gpagliaroli
Member
Registered: 2015-03-28
Posts: 2

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

mariolino wrote:
gpagliaroli wrote:

I have a phone Samsung S3 Neo, in which all commands for a Mifare Classic card works, but the commands do not work on use of blocks of value. They know that this is due? or am I doing something wrong?
Thank you.

Unfortunately the Samsung S3 Neo use the NFC broadcom chip and it doesn't compatible with NXP tags.
You can buy the old S3 model, it was fully working :-)

Thx hmm

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#360 2015-10-24 23:03:23

asper
Contributor
Registered: 2008-08-24
Posts: 1,409

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Device tested: Samsung Galaxy S4 Value Edition [I9515] is NOT compatibile with MCT.

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#361 2015-11-12 22:34:18

roni29180
Member
Registered: 2015-11-12
Posts: 3

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

hello
is there any possibility to use MCT with external acr122u nfc reader?
i have a samsung note 3 not compatibile with mifare clasic

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#362 2015-11-17 11:09:35

zyd306
Member
Registered: 2015-11-17
Posts: 4

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

I agree with the upstairs, if you can make MCT support ACR122 will be able to let a lot of mobilephone for the use of OTG functions and not need to buy a NFC mobilephone, the cost is lower, I hope you can consider, thank you. I found a mistake, the wrong format control bit as sector of the last,should be “FF078069” is not “FF0780BC”

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#363 2015-11-17 11:11:28

zyd306
Member
Registered: 2015-11-17
Posts: 4

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

example-dump-file smile

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#364 2015-11-17 12:35:08

zyd306
Member
Registered: 2015-11-17
Posts: 4

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

I have just started learning to write a program, testing the code of others, but the source code in the presence of two BUG, can you guide me, thx you! Source address: https://github.com/flylai/WaterCard_RW_forAndroid ,  When the program starts, NC is not enabled,if you click NFC settings, even if the NFC does not open the return will not be detected  ; triggering NFC can only read the card can not write a card,If you click on writecard, the program crashes.You can reply to my e-mail, thx you very much!

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#365 2015-11-19 11:37:49

zyd306
Member
Registered: 2015-11-17
Posts: 4

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Two Bugs I  have solved myself smile  smile

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#366 2015-11-29 14:58:50

ikarus
Contributor
Registered: 2012-09-20
Posts: 249
Website

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

roni29180 wrote:

hello
is there any possibility to use MCT with external acr122u nfc reader?
i have a samsung note 3 not compatibile with mifare clasic

It is not possible by now. But there are others out there wanting the same feature.
Have a look at: https://github.com/ikarus23/MifareClassicTool/issues/13.
Unfortunately my statement is the same as it was a year ago:
http://www.proxmark.org/forum/viewtopic … 879#p12879


zyd306 wrote:

I found a mistake, the wrong format control bit as sector of the last,should be “FF078069” is not “FF0780BC”

This is not a mistake. I chose to do it this way because all the empty tags I own were formatted this way.
I'm not exactly sure why. This byte (the General Purpose Byte - GPB) is 0x69 for standardized
cards and refers to non-personalized card, according to the Mifare Application Directory (MAD) standard.
But I'm not sure why the GPB of the last sector is 0xBC. I've seen this on both, 4byte and 7byte UID, tags.

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#367 2015-11-29 15:00:11

ikarus
Contributor
Registered: 2012-09-20
Posts: 249
Website

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

New release! (Version 2.0.5: APK-file, Google Play (Donate Version), F-Droid)
(See: original post, updated)

* Bugfix: Don't save key files with bad characters.
   Thanks to Pascal for fixing this issue.
* Fixed SAK issue of Sony's Xperia Z3 in combination with emulated tags.
   Thanks again to "bildin" and to "moscowneversleeping" for reporting,
   testing and patching this issue.
* OnePlus One, Samsung Galaxy Grand Prime, Samsung Galaxy S5 mini,
   Sony Xperia Z2 (some models), Google Nexus 9, Jiayu S3,
   LG G4, Samsung Galaxy A5, ZTE Nubia Z7 Max (NX505J),
   Samsung Galaxy S6, Samsung Galaxy S6 Edge, Asus Zenfone 2,
   Google Nexus 6, Motorola's Moto X (2014, 2ed gen.) are not supported.


Have a nice day!
ikarus

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#368 2015-12-12 14:49:56

ikarus
Contributor
Registered: 2012-09-20
Posts: 249
Website

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

KCO wrote:

any possibility of including decoding of other data besides the value blocks ?

what kind of decoding are you missing?

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#369 2015-12-14 20:14:29

ikarus
Contributor
Registered: 2012-09-20
Posts: 249
Website

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Hi Tosh,

have a look at this post.

Cheers
  ikarus

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#370 2016-01-23 18:50:40

ikarus
Contributor
Registered: 2012-09-20
Posts: 249
Website

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

New release! (Version 2.0.6: APK-file, Google Play (Donate Version), F-Droid)
(See: original post, updated)

* Bugfix: Fixed crash which occurred instantly after
   starting (on some devices).

There are still some issues on Android 6.x devices like the Nexus 5x/6p.
* https://github.com/ikarus23/MifareClassicTool/issues/77
* https://github.com/ikarus23/MifareClassicTool/issues/78
I'm working on it...


Have a nice day!
ikarus

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#371 2016-01-27 09:34:40

atkinchris
Contributor
Registered: 2016-01-24
Posts: 10

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

fusionous wrote:

Hello, May I inquire what device should I use to read and write a mifare card?

Android phones with NFC are a great start - they support a range of tags and libraries. Are you getting any errors?

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#372 2016-01-30 11:18:06

ikarus
Contributor
Registered: 2012-09-20
Posts: 249
Website

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Hey there,
any Android phone/tablet with an NFC chip by NXP should do the trick.
However there are some strange behaviors within new Android devices lately.
Like the Nexus 5x/6p or other Android 5.x/6.x devices.

There are some devices which are definitively know to work with MCT.
Have a look at the readme file.

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#373 2016-02-05 22:52:47

ikarus
Contributor
Registered: 2012-09-20
Posts: 249
Website

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

New release! (Version 2.0.7: APK-file, Google Play (Donate Version), F-Droid)
(See: original post, updated)

* Bugfix: Request permissions on Android 6.x devices to read/write
   the external storage. Thanks to Mislav Jurinić.

Running MCT on Android 6.x devices should be fine by now.

Have a nice day!
ikarus

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#374 2016-02-14 18:54:56

twisted.transistor
Member
Registered: 2016-02-14
Posts: 4

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Hi there. I have been using your app for a while and what to say huge thanks to you for developing it!

Past time I've got a problem. I have a Mifare Classic tag, but cause of some reasons tag's SAK was changed from 08 to 20 which leads to the situation when I can not use Mifare Classic app. I just got a message that "Not Mifare Classic tag".

Is there any way I can change the SAK manually?
I've tried to make a dirty fix myself using code from GitHub, but I failed.

Will really appreciate any help, thanks.

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#375 2016-02-24 21:23:04

vlader
Member
Registered: 2016-02-24
Posts: 5

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

I have just encountered with SAK problem too.

It was changed from 8 to 20 and I can't use MFT with my card.

Is it possible to add SAK editor option to MFT?

Thanks!

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#376 2016-03-02 12:52:36

ikarus
Contributor
Registered: 2012-09-20
Posts: 249
Website

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Hi twisted.transistor, Hi vlader.

Sorry for not answering earlier. I've just had a look at the MIFARE Type Identification Procedure (page 10+).
As you can see, a change of the SAK from 0x08 to 0x20 is common for Mifare Plus tags when the security level (SL)
is increased from 1 to 3. These tags are used to migrate from an old Mifare Classic environment to a more secure
Mifare Plus environment. Mifare Plus tags with security level 1 are compatible with Mifare Classic. However, with
a security level 3 Mifare Plus tags are now longer compatible with Mifare Classic as they now use stronger crypto.

So I think you have tags of an Mifare Classic deployment that just migrated to Mifare Plus SL 3...
Maybe you find some way to validate this.

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#377 2016-03-02 21:13:23

vlader
Member
Registered: 2016-02-24
Posts: 5

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Hi, ikarus.

You are completely right. Our cards migrated to newer protocol, we see it via updated SAK.

Probably the procedure of reading new dumps would be more complicated with Mifare Plus data or even impossible.

But I have old dump which I can't write to the same card.

Is it possible not to read SAK before dump writing and let MCT overwrite the whole card using old Mifare 1k dump?

Thanks,
vlader

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#378 2016-03-03 14:05:02

ikarus
Contributor
Registered: 2012-09-20
Posts: 249
Website

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Hi vlader,
I'm not sure if I got you right: you got a dump from the time the tag had a SAK of 0x08.
Now you want to write that dump back to the tag that has now a SAK of 0x20?
As far as I know, Mifare Plus tags with a SL of 3 are no longer compatible with Mifare Classic.
This means you can neither read nor write them witn MCT.

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#379 2016-03-03 19:30:26

twisted.transistor
Member
Registered: 2016-02-14
Posts: 4

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

ikarus wrote:

Hi vlader,
I'm not sure if I got you right: you got a dump from the time the tag had a SAK of 0x08.
Now you want to write that dump back to the tag that has now a SAK of 0x20?
As far as I know, Mifare Plus tags with a SL of 3 are no longer compatible with Mifare Classic.
This means you can neither read nor write them witn MCT.

Hi ikarus. I think I got the same problem as vlader.
I have a Mifare Classic tag that had SAK of 0x08, but somehow the SAK was changed and now my Mifare Classic tag has SAK of 0x20.
And what we are looking for is either way to change SAK of the tag back to 0x08, either the way to avoid checking for the SAK (when your application is launched) so we will be able to work with our Mifare Classic tags like we did before.

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#380 2016-03-03 21:55:08

vlader
Member
Registered: 2016-02-24
Posts: 5

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

ikarus wrote:

Hi vlader,
I'm not sure if I got you right: you got a dump from the time the tag had a SAK of 0x08.
Now you want to write that dump back to the tag that has now a SAK of 0x20?
As far as I know, Mifare Plus tags with a SL of 3 are no longer compatible with Mifare Classic.
This means you can neither read nor write them witn MCT.

Hi ikarus,

Everything was described by twisted.transistor.

I'll try to do it once more.

Initially, I have Mifare Classic tag with SAK 0x08. I made a dump from it.

Then, after some time of using this tag I discovered then SAK in my card was suddenly changed to 0x20, the most probably it happened while balance replenishment. I emphasize that the tag is the same and it was never changed.

I hope that SAK changing operation with the same plastic card is reversible.

Now I am asking about possibility to write my old dump to my old Mifare Classic card, where just SAK was changed.

It would be even better if we have possibility to change SAK back or read tag with SAK 0x20 using reading method from SAK 0x08 tags.

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#381 2016-03-04 00:54:45

ikarus
Contributor
Registered: 2012-09-20
Posts: 249
Website

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Hi twisted.transistor, hi vlader,
how could you be sure if it's still a Mifare Classic tag? Are you sure it was not a Mifare Plus tag in
compatibility mode (SL 1) before? And if not, what caused the change of the SAK?
Do you have other Mifare Classic tags? Do they still show a SAK of 0x08?
Have you checked apps like NFC TagInfo? Do they identify your tag as Mifare Classic?

Only if you are sure that your tag is still a Mifare Classic tag with a wrong SAK (for whatever reasion),
it makes sense to edit MCT in order to ignore the SAK. And even then it might be impossible because
of how Android handels NFC tags.

Changing the the SAK back to 0x08 is not possible for an original Mifare Classic tag. As far as I know
changing the SAK in any way is only possible for tags emulating a Mifare Classic tag (e.g. SmartMX)
or Mifare Plus tags (by changing the SL).

Last edited by ikarus (2016-03-04 00:57:21)

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#382 2016-03-04 08:28:12

vlader
Member
Registered: 2016-02-24
Posts: 5

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Hi ikarus,

The most probably it  is Mifare Classic card because I've been using it several years.

"how could you be sure if it's still a Mifare Classic tag?" As I wrote above it's too old card.

"Are you sure it was not a Mifare Plus tag in compatibility mode (SL 1) before? " All the other soft shows it exactly.

"And if not, what caused the change of the SAK?" As I wrote in my previous post the most probably changes were made while balance replenishment using my tag.

"Do you have other Mifare Classic tags? " Of course, they where bought at the same time but keep working with your app because I haven't done balance replenishment in a while.

"Do they still show a SAK of 0x08?" Of course.

"Have you checked apps like NFC TagInfo?" Yes, both tags were checked I mean working one and not working one.

Not working one provide just a little: Type A(ISO/IEC 1443 Type A)
                                                      RF techology
                                                      Type A(ISO/IEC 14443 Type A)
                                                      Tag type
                                                       ISO/IEC 14443-4 Smart Card
                                                       SAK 20

Working one provide me following: Type A(ISO/IEC 1443 Type A)
                                                   RF techology
                                                   Type A(ISO/IEC 14443 Type A)
                                                   Tag type
                                                   Mifare Classic 1K
                                                   SAK 08
and a lot of data in different formats and access conditions.

"Only if you are sure that your tag is still a Mifare Classic tag with a wrong SAK (for whatever reasion),
it makes sense to edit MCT in order to ignore the SAK."  - Could you please try with version, which is not checks SAK even custom one?

Thanks!

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#383 2016-03-04 10:54:03

ikarus
Contributor
Registered: 2012-09-20
Posts: 249
Website

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Hi vlader,
thank you for the information. I will look into a MCT version which ignores the strange SAK.
But this will take some time. I'm AFK for about a week. And I'm pretty sure it will not work.
Not because of MCT but because of Android. As the other apps show, Android didn't even
recognize it as a Mifare Classic tag... And there is pretty much nothing I can do about that.
Its part of the Android Tag Dispatch System.

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#384 2016-03-04 11:06:14

twisted.transistor
Member
Registered: 2016-02-14
Posts: 4

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Here is my situation.
I also have two Mifare Classic tags. Both of them did work before with your application and had SAK of 0x08.

After some time the SAK of one of them have been changed. In my opinion the reason that it has been changed it is because tag was rewritten with "Tag writing machine" (sorry, I don't know how is it called). Probably this machine used different protocol and it caused changing the SAK.
I am sorry, I don't know much about this, but based on what I know I did my guessing.

Here are examples of two Mifare Classic tags I have. Both of them were bought at the same time.

This one works: OAFNXXvV57s.jpg

This one doesn't : 9-rs10fdQpI.jpg

I modified code of your program that I took from GitHub and deleted SAK checking part from it. Unfortunately I still was unable to write dumb to my tag.

Thank you very much for your answers and help.

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#385 2016-03-04 13:46:55

marshmellow
Contributor
From: US
Registered: 2013-06-10
Posts: 2,302

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Ok guys ikarus is being very kind.  But do some research.  Your tags are NOT true mifare classic cards.  The tags have been working in a legacy compatibility mode for years until the system they are used in upgraded to a higher security mode.  Those higher security cards have been available for over 8 years.  You are out of luck with whatever illegal or not activity you are attempting. 

True classic mifare cards cannot have their sak changed.  It is not possible. 

And once your cards are in a high security mode only the system that has the correct authentication can modify or even read it.

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#386 2016-03-04 15:14:37

twisted.transistor
Member
Registered: 2016-02-14
Posts: 4

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

marshmellow wrote:

Ok guys ikarus is being very kind.  But do some research.  Your tags are NOT true mifare classic cards.  The tags have been working in a legacy compatibility mode for years until the system they are used in upgraded to a higher security mode.  Those higher security cards have been available for over 8 years.  You are out of luck with whatever illegal or not activity you are attempting. 

True classic mifare cards cannot have their sak changed.  It is not possible. 

And once your cards are in a high security mode only the system that has the correct authentication can modify or even read it.


I did the research, but like I said before I don't have enough knowledge about NFC tags cause I have never worked with ones.
Thank you very much for your answer.

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#387 2016-03-04 15:37:09

vlader
Member
Registered: 2016-02-24
Posts: 5

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Thanks a lot, marshmellow, ikarus!

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#388 2016-03-25 23:44:53

roni29180
Member
Registered: 2015-11-12
Posts: 3

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

@ikarus
if possible can you add the possibility to use external acr122u nfc reader will mfc? I have an incompatible  nfc android phone.
I have installed the driver for this reader on my phone
thanks in advance

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#389 2016-03-25 23:53:35

roni29180
Member
Registered: 2015-11-12
Posts: 3

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

ikarus wrote:
roni29180 wrote:

hello
is there any possibility to use MCT with external acr122u nfc reader?
i have a samsung note 3 not compatibile with mifare clasic

It is not possible by now. But there are others out there wanting the same feature.
Have a look at: github.com/ikarus23/MifareClassicTool/issues/13
I have read this now.

Waiting

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#390 2016-03-27 10:38:18

ikarus
Contributor
Registered: 2012-09-20
Posts: 249
Website

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

@simraill
Hi! And sorry for not answering earlier. The error you got there sounds strange. It is most likely
that you've got the wrong tag and the success message is a false positive... There are a lot of
vendors on Aliexpress that claim their tags are "block 0 direct write", but in fact, they aren't.
If you have access to a USB RFID reader (like the ACR122u) you could try to change the UID with
that. Best of luck!

@roni29180
As it stats in the issue ("I'm really low on time lately. sad") you might have to wait longer.
I can name you no date or whatsoever.I don't know when I will work on that feature request.
If you really need to do some Mifare Classic stuff, just connect your ACR 122u to a laptop.
If you really need to do some Mifare Classic stuff with your phone (now), there are two options:
1. Get a phone that is capable of interacting with Mifare Classic tags
2. Write the ACR 122u support for MCT yourself wink

Cheers
  ikarus

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#391 2016-05-14 19:05:41

roman921
Contributor
Registered: 2015-06-21
Posts: 48

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

I write bcc wrong byte in my magic card uses MCT tools, card don't work now. Help me, how restore this card ?

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#392 2016-05-15 01:48:09

ikarus
Contributor
Registered: 2012-09-20
Posts: 249
Website

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

I answered in the github issue.

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#393 2016-05-15 12:02:07

roman921
Contributor
Registered: 2015-06-21
Posts: 48

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

I have Magick cards with standard and special command with special know how to recover, and with the usual do not know how.

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#394 2016-05-15 16:37:38

roman921
Contributor
Registered: 2015-06-21
Posts: 48

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

@ikarus, do you can to do in MCT warning that BCC byte incorrect and don't allow write dump with incorrect BCC byte.
You'll save a lot of Magick card this patch)

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#395 2016-05-16 01:18:56

ikarus
Contributor
Registered: 2012-09-20
Posts: 249
Website

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Like I said in github issue #81, I'm planning to implement such a feature.

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#396 2016-05-20 02:40:57

supremee
Contributor
Registered: 2016-05-20
Posts: 7

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Hi, it was successful reading my blank fob from ebay.  but couldn't read one apartment key which is mifare classic as well.

It is detected and read on tool menu but can't be read the code inside. It takes longer than blank keys and finally unsuccessful. What is problem with this? Help me please. Thanks,

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#397 2016-05-24 06:54:07

ikarus
Contributor
Registered: 2012-09-20
Posts: 249
Website

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Hi supremee,
a blank fob has a default key of FFFFFFFFFFFF for all sectors. Your apartment key has most likely individual keys for all sectors. You can't read a Mifare Classic tag without knowing its key. You can extract those keys with a simple USB RFID reader and software like mfoc. Just do a little research on the internet. wink

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#398 2016-05-25 16:57:54

whale
Member
Registered: 2016-05-25
Posts: 3

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Hi,

Thank you for all this, it's great ! smile

I have a little question about data in sector 0 block0 : [00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15]

I know this :
[00 01 02 03] : 4 bytes UID
[04] : 00+01+02+03 (with + = xor)
[14] : week of production (as asper noticed it)
[15] : year of production (as asper noticed it)

By analysing frames I think :
[05 06 07] is a block with manufacturer data but what kind of data ?
[08 09 10] (the same)       
[11 12] is also a block , maybe function of [05 06 07]  and [08 09 10]
[13] is also a block, function of [04], but how ?

I hope I've been quite clear...

Any idea ?

Thanks smile

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#399 2016-05-26 19:51:00

ikarus
Contributor
Registered: 2012-09-20
Posts: 249
Website

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Hi whale, what do you mean by "analyzing frames"? And no, I have no clou what else is inside a block 0 of commen Mifare Classic tags. hmm

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#400 2016-05-26 19:57:04

ikarus
Contributor
Registered: 2012-09-20
Posts: 249
Website

Re: MCT - An Android NFC-App for reading/writing/analysing/etc. MF Classic

Hi everyone,
could those of you with a Samsung Galaxy S6 or a Galaxy S6 Edge do me a favor?
Could you install the latest version of MCT from here and tell me if you are able
to read and write tags? I'm still not sure if those devices are capable of reading/writing
Mifare Classic tags.

Thanks!

Cheers
  ikarus

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