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ts_102221: Add "resume_uicc" command 

We've had a "suspend_uicc" command since commit
ec95053249 in 2021, but didn't yet
have the corresponding "resume" pair.

Note that you cannot really execute this in a reasonable way from
within pySim, as it is required to power-cycle the card
between SUSPEND and RESUME, see TS 102 221 Section 11.1.22.3.2

Change-Id: I3322fde74f680e77954e1d3e18a32ef5662759f2
This commit is contained in:
Harald Welte 2023-06-06 17:21:13 +02:00
parent 659781cbe1
commit b0e0dce80a
3 changed files with 32 additions and 1 deletions
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14
docs/shell.rst
View File

@ -217,6 +217,20 @@ including the electrical power down.
:module: pySim.ts_102_221
:func: CardProfileUICC.AddlShellCommands.suspend_uicc_parser
resume_uicc
~~~~~~~~~~~
This command allows you to perform the SUSPEND UICC command for the RESUME operation on the card.
Suspend/Resume is a relatively recent power-saving addition to the UICC specifications, allowing for
suspend/resume while maintaining state, as opposed to a full power-off (deactivate) and power-on
(activate) of the card.
The pySim command just sends that SUSPEND UICC (RESUME) command and doesn't perform the full related
sequence including the electrical power down.
.. argparse::
:module: pySim.ts_102_221
:func: CardProfileUICC.AddlShellCommands.resume_uicc_parser
pySim commands

7
pySim/commands.py
View File

@ -631,6 +631,13 @@ class SimCardCommands:
resume_token = data[4:]
return (negotiated_duration_secs, resume_token, sw)
# ETSI TS 102 221 11.1.22
def resume_uicc(self, token: str):
"""Send SUSPEND UICC (resume) to the card."""
if len(h2b(token)) != 8:
raise ValueError("Token must be 8 bytes long")
data, sw = self._tp.send_apdu_checksw('8076010008' + token)
def get_data(self, tag: int, cla: int = 0x00):
data, sw = self._tp.send_apdu('%02xca%04x00' % (cla, tag))
return (data, sw)

12
pySim/ts_102_221.py
View File

@ -864,12 +864,22 @@ class CardProfileUICC(CardProfile):
# not ISO7816-4 but TS 102 221
@cmd2.with_argparser(suspend_uicc_parser)
def do_suspend_uicc(self, opts):
"""Perform the SUSPEND UICC command. Only supported on some UICC."""
"""Perform the SUSPEND UICC command. Only supported on some UICC (check EF.UMPC)."""
(duration, token, sw) = self._cmd.card._scc.suspend_uicc(min_len_secs=opts.min_duration_secs,
max_len_secs=opts.max_duration_secs)
self._cmd.poutput(
'Negotiated Duration: %u secs, Token: %s, SW: %s' % (duration, token, sw))
resume_uicc_parser = argparse.ArgumentParser()
resume_uicc_parser.add_argument('token', type=str, help='Token provided during SUSPEND')
@cmd2.with_argparser(resume_uicc_parser)
def do_resume_uicc(self, opts):
"""Perform the REUSME UICC operation. Only supported on some UICC. Also: A power-cycle
of the card is required between SUSPEND and RESUME, and only very few non-RESUME
commands are permitted between SUSPEND and RESUME. See TS 102 221 Section 11.1.22."""
self._cmd.card._scc.resume_uicc(opts.token)
class CardProfileUICCSIM(CardProfileUICC):
"""Same as above, but including 2G SIM support"""