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Re: usbdeviceopen failure - non-classic problem

Hi Joseph,

On Oct 24, 2005, at 6:04 AM, Joseph Antony wrote:

To reiterate and update, I am writing a CFPlugin bundle for spr532
(SCM microsystems) usb smart card reader. When I tried to open the
interface (USBInterfaceOpen), I am getting a a 0xE00002c5 ( exclusive
access and device already open) error.

I notice that you're running Mac OS X 10.4.2. On Tiger, the OS owns smart card readers that have PC/SC drivers on the system. These drivers live in /usr/libexec/SmartCardServices/drivers.

To see if PC/SC knows about your reader, open Terminal and run pcsctest. If that test tool shows the name of your reader, it's already been opened by PC/SC.

Session with unknown reader:

$ pcsctest

MUSCLE PC/SC Lite Test Program

Testing SCardEstablishContext    : Command successful.
Testing SCardGetStatusChange
^C

Session with known reader:

$ pcsctest

MUSCLE PC/SC Lite Test Program

Testing SCardEstablishContext    : Command successful.
Testing SCardGetStatusChange
Please insert a working reader   : Command successful.
Testing SCardListReaders         : Command successful.
Reader 01: CCID Smart Card Reader 0 0
Enter the reader number          : ^C

The next question is: what task are you trying to accomplish? There's a whole smart card support infrastructure on Tiger that you should probably be taking advantage of instead of rolling your own. For example, if you write a small module (called a tokend) that knows the specifics of the card you want to use, you get system-wide smart card authentication, S/MIME support in Mail, and Safari integration for free.

BTW, as this topic has more to do with Mac OS X security services than with USB, you might want to move this thread to the apple-cdsa mailing list, as that's where the engineers who work on Mac OS X smart card support hang out.

<http://lists.apple.com/apple-cdsa>.

Regards,
--gc



__________________________________________________________________

Garth Cummings                

Apple Developer Technical Support     email@hidden


http://developer.apple.com/technicalsupport


 

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