Re: How to save pin number and auto-connect on startup?

[Dan Williams <dcbw redhat com>]

On Fri, 2010-10-22 at 12:48 -0500, Dan Williams wrote:
> On Fri, 2010-10-22 at 08:37 -0400, Mathieu Trudel wrote:
> > On Thu, Oct 21, 2010 at 1:53 PM, Marcel Holtmann <marcel holtmann org> wrote:
> > [...]
> > > I think this is the wrong approach. You mentioned yourself that the PIN
> > > is bound to the SIM. And unless you base this of the ICCID you should
> > > not be allowing storing of a PIN based on modem specific features. The
> > > only exception would be if the SIM card is physically integrated into
> > > the device. However this is only done for M2M devices anyway and not for
> > > normal desktop devices.
> > >
> > 
> > I have to respectfully disagree here: unfortunately, some devices
> > don't seem to play well with getting the ICCID, so I think it's a
> > reasonable approach to expect most people to have one device, with a
> > SIM card usually not being moved across devices. For reference, these
> > devices were a Huawei E1831 and Huawei E182E. I used the same at+cgsn
> > approach to make a reasonable guess as to the devices' identification.
> 
> Quick roundup of trying to get SIM identifiers:
> 
> AT+CIMI: none
> AT+CRSM(EFiccid): Option, Longcheer
> AT!ICCID: Sierra
> Nothing: ZTE, Huawei, Ericsson, Novatel
> 
> (I used AT+CRSM=176,12258,0,0,10 to query EFiccid)
> 
> > At least for two modems I've been testing for the past week, they
> > refuse to support AT!ICCID, I've tried a couple of different things
> > without luck.. The only thing I haven't tried was to get the ICCID
> > through at+csim?.
> 
> Yeah, AT!ICCID works for Sierra devices and as a bonus you don't need to
> decode the response.  See the above command for getting the ICCID via
> +CRSM, but Sierra devices do not allow that command before PIN
> unblocking.

ModemManager git master now has code to generate an obfuscated SIM
identifier that may be preferred over the Device Identifier for
automatically unlocking the SIM.  The UI parts still have to get done,
any takers?  Basically the applet needs to look for DeviceIdentifier and
SimIdentifier when the modem shows up and use that to query the Gnome
Keyring for a saved PIN code.  If it finds one, it sends that PIN to
ModemManager.  If not, it asks the user, and if the unlock operation is
successful and if the user checked a new "Automatically unlock this
device" checkbox in the initial PIN dialog, it saves the PIN code in the
keyring using the SimIdentifier/DeviceIdentifier.  Something like that.

Dan