FYI: SIM

Sébastien Lorquet squalyl at gmail.com
Tue Mar 9 15:59:35 UTC 2010


Hmm we can take this the reverse way:
Instead of implementing PCSC for the phone SIM, we can implement the phone
API for PCSC.
This will me MUCH more simpler.
A thread with a queue to collect the commands and call the callback when the
response is received, then we're done (yes, pcsc is synchronous)

On Tue, Mar 9, 2010 at 4:54 PM, Harald Welte <laforge at gnumonks.org> wrote:

> On Tue, Mar 09, 2010 at 04:25:11PM +0100, Sébastien Lorquet wrote:
>
> > I don't know which GSM stack layer needs to exchange APDUs. I guess it's
> not
> > level 1,
>
> In normal GSM stacks, yes, the Layer1 provides an abstraction layer for
> SIM card access.
>
> Hwoever, the actual SIM card read/write commands come from Layer 3 or
> the application above that.
>
> > so apdus will be exchanged through the serial link with the phone.
> > It may be nice to have a pcsclite driver to drive the sim card in the
> phone.
> > Then we'll be able to use a SIM cards connected to the real phone, or a
> ccid
> > smart card reader connected to the PC running the layer2/layer3, using
> the
> > same API.
>
> Yes, I like that idea, and we can easily use yet another of our HLDC
> data link connections for this.
>
> However, it seems almost like a bit of over-engineering to me to go a
> far as to support PC/SC.  Sure, it's a cool hack, and if somebody has
> an interest in it and some time to spare.
>
> But then, as long as the Layer3 is on the PC, it would be fine if it can
> support real PC/SC readers.  Only when we start to support running
> layer3 inside the phone, we would require the use of the SIM card reader
> inside the phone.
>
> --
> - Harald Welte <laforge at gnumonks.org>
> http://laforge.gnumonks.org/
>
> ============================================================================
> "Privacy in residential applications is a desirable marketing option."
>                                                  (ETSI EN 300 175-7 Ch. A6)
>
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