From 34b05d3707cc06c7ef44d4aa1d3631aee33dc5a9 Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@osmocom.org>
Date: Tue, 25 May 2021 22:03:13 +0200
Subject: [PATCH] shell: Add 'status' command to issue STATUS APDU

This can be used to get the FCP of the currently selected file.

Change-Id: I65c97adadd831ca2daa5a0dbb52a37999f8514fd
---
 pySim-shell.py      | 5 +++++
 pySim/commands.py   | 4 ++++
 pySim/filesystem.py | 5 +++++
 3 files changed, 14 insertions(+)

diff --git a/pySim-shell.py b/pySim-shell.py
index 0069661c..edd8112a 100755
--- a/pySim-shell.py
+++ b/pySim-shell.py
@@ -443,6 +443,11 @@ class Iso7816Commands(CommandSet):
 		"""Close a logical channel."""
 		(data, sw) = self._cmd.card._scc.manage_channel(mode='close', lchan_nr=opts.chan_nr)
 
+	def do_status(self, opts):
+		"""Perform the STATUS command."""
+		fcp_dec = self._cmd.rs.status()
+		self._cmd.poutput_json(fcp_dec)
+
 
 option_parser = argparse.ArgumentParser(prog='pySim-shell', description='interactive SIM card shell',
                                         formatter_class=argparse.ArgumentDefaultsHelpFormatter)
diff --git a/pySim/commands.py b/pySim/commands.py
index 689cbeab..4640fe13 100644
--- a/pySim/commands.py
+++ b/pySim/commands.py
@@ -359,6 +359,10 @@ class SimCardCommands(object):
 			ret = {'successful_3g_authentication': data}
 		return (ret, sw)
 
+	def status(self):
+		"""Execute a STATUS command as per TS 102 221 Section 11.1.2."""
+		return self._tp.send_apdu_checksw('80F20000ff')
+
 	def deactivate_file(self):
 		"""Execute DECATIVATE FILE command as per TS 102 221 Section 11.1.14."""
 		return self._tp.send_apdu_constr_checksw(self.cla_byte, '04', '00', '00', None, None, None)
diff --git a/pySim/filesystem.py b/pySim/filesystem.py
index 8cdb23e9..aaf333be 100644
--- a/pySim/filesystem.py
+++ b/pySim/filesystem.py
@@ -1145,6 +1145,11 @@ class RuntimeState(object):
 
         return select_resp
 
+    def status(self):
+        """Request STATUS (current selected file FCP) from card."""
+        (data, sw) = self.card._scc.status()
+        return self.selected_file.decode_select_response(data)
+
     def read_binary(self, length:int=None, offset:int=0):
         """Read [part of] a transparent EF binary data.