Re: How to Identify USB devices on linux/ubuntu/debian

I see, the stack introduces a level of abstraction which discards this information. 

I will try to workaround this by reinitializing the crypto parts each time. 
I hope I can cover all my test cases like this. 

So for the use case: 

In an automated test setup I will be running a number of containerized systems needing exactly one card reader containing the right card. 

On the host level I am assigning a USB device to the container , inside the container I am just using the first card available. 

When the (usb) device - card mapping is going wrong I will end up in encryption problems when the wrong card with the wrong key is connected to my current container. 

Thanks a lot for the quick & efficient support!!! 


From: "Ludovic Rousseau" <[email protected]> 
To: "pcsclite-muscle" <[email protected]> 
Sent: Monday, January 30, 2017 2:19:53 PM 
Subject: Re: [Pcsclite-muscle] How to Identify USB devices on linux/ubuntu/debian 

2017-01-30 13:28 GMT+01:00 Uv Wildner < [email protected] >: 
> Hello, 

Hi, 

> so the API does not provide for the USB device information. That's too bad. :( 

A smart card reader is not always a USB device. 
When PC/SC was designed smart card readers were serial devices connected to a serial port. 

> I wonder where that information about the device to card reader mapping gets lost, as it obviously is needed somewhere in the stack?!?! 

The information is present in pcsc-lite and in the CCID driver. 
For example pcscd calls libccid with a parameter like "usb:08e6/3437:libudev:0:/dev/bus/usb/001/002" 
http://pcsclite.alioth.debian.org/api/group__IFDHandler.html#gabb9fe35a68fa080ce9397f0b830b1e7e 

My question was and still is: why do you need this information at the application level? 

Bye 

-- 
Dr. Ludovic Rousseau 

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