Unhappy user

 I just received this email:

Subject: I have a question with your library

Your library is garbage.  

It's too unstable, sometimes it works, sometimes it doesn't.
 Why do you publicize your library, as if it really works?

I've just wasted time configuring, fixing bugs, reading your old recommendations.

This is horrible. The version of pcsc lite has failed, I have sometimes failed to read nfc or newly released readers. Even your makefile for C fails. It is impossible to maintain your library. Sometimes it has worked, but I restart the pc and it no longer works. It's terrible.

 I just wasted my time with your library trash.  

First I thought it was just a spam. But then it talks about pcsc-lite so it must really be for me.

I don't find any question in the text. I also do not find any specific issue or problem to fix.

It is strange to take the time to write such an email. I think that is the first time I receive this kind of email.

I do not include the author name or email address. But if you (the author of the email) read this I propose you to join the pcsclite-muscle mailing list and report your problems there. I am sure someone can help you.

sysmoOCTSIM: 8 slots reader

Sysmocom designed and sells a smart card reader with 8 slots for SIM sized cards (2FF form factor). It is the sysmoOCTSIM

 

I received such a reader a few days ago (thanks Harald W.). In my case the reader has a nice aluminium casing to protect the electronic.

I added the reader in my list at: sysmocom_sysmoOCTSIM.

 

8 slots

The reader has 8 slots. From the CCID USB descriptor:

  bMaxSlotIndex: 0x07

The index starts at 0 so a maximum of 7 indicates 8 slots.

 

And it declares that it can support 8 slots busy at the same time.

  bMaxCCIDBusySlots: 8

So it is possible to use the 8 slots at the same time.

This device is the only one to have 8 slots in my list: https://ccid.apdu.fr/select_readers/?bMaxSlotIndex=7

You can also display the reader list sorted by bMaxSlotIndex field to easily see the other readers that have more than 1 slot.

 

Free Software Firmware

The reader firmware is free software (or open source if you prefer this denomination). The license is GNU GPL 2 or a later version.

The git repository is https://git.osmocom.org/osmo-ccid-firmware/
The bug tracker is https://osmocom.org/projects/osmo-ccid-firmware

The only other free software CCID firmware I know of is Tian Tian Xiang Shang used in the GnuK project (An Implementation of USB Cryptographic Token for GnuPG).

CCID driver limitation

My CCID driver does support multi-slots readers since version 0.9.2 released in 2004.

But the driver is limited because it does not support using the slots at the same time, even if the reader declares it supports it.

pcsc-lite has support for simultaneous multi-slot. But the driver tells pcsc-lite that simultaneous multi-slot is not supported. See this code: https://salsa.debian.org/rousseau/CCID/-/blob/master/src/ifdhandler.c#L490

Of course I tried to modify the code of the CCID driver to tell pcsc-lite that simultaneous multi-slot can be used. But then the driver is confused by mixed USB frames. I then remembered why this support was disabled.

 

Improvement

Adding support of simultaneous multi-slots is possible. That will require some work on the CCID driver.

If you want or plan to use such a reader with pcsc-lite on GNU/Linux or another Unix system then contact me so we can discuss what you can do.

Conclusion

I sometimes receive requests about configurations with a lot of smart card readers. Using an 8 slots reader can be part of the solution. This reader requires the use of only one USB port and has its own power supply unit.

The reader firmware is Free Software and I like that. It can only be a good point in the selection of a smart card reader.

GitHub Sponsors: US$ 20 per month

Since January 2020 I participate in the GitHub Sponsors. See my post "GitHub Sponsors".

I received the first payment in May 2020. See "GitHub Sponsors: first payment".

You can see my public GitHub sponsor page at "Become a sponsor to LudovicRousseau".

New sponsor

I now have a new sponsor at $10 per month. That will double my Sponsors revenue. Yeah!
Thanks a lot to the existing 6 sponsors. You are wonderful.

I added a new tier at $20/month in case someone want to be even more generous.

Bitcoin

It is also possible to send me bitcoins. See "How to help my projects? Send me bitcoins!".

Someone sent me some BTC cents (or micro cents) just a few days ago. Thanks to you anonymous.

Conclusion

I plan to make a status in next January for the 1st anniversary of my participation to the GitHub Sponsors program.