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ts_31_102: Add shell command for GET IDENTITY

GET IDENTITY is used in the "SUCI computation on USIM" feature.

Change-Id: I619d397900dbd6565f8f46acdabcee511903830c
---
M docs/shell.rst
M pySim/commands.py
M pySim/ts_31_102.py
3 files changed, 39 insertions(+), 0 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/pysim refs/changes/12/33212/1

diff --git a/docs/shell.rst b/docs/shell.rst
index cce790a..e13d054 100644
--- a/docs/shell.rst
+++ b/docs/shell.rst
@@ -566,6 +566,12 @@
    :module: pySim.ts_31_102
    :func: ADF_USIM.AddlShellCommands.envelope_sms_parser
 
+get_identity
+~~~~~~~~~~~~
+.. argparse::
+   :module: pySim.ts_31_102
+   :func: ADF_USIM.AddlShellCommands.get_id_parser
+
 
 File-specific commands
 ----------------------
diff --git a/pySim/commands.py b/pySim/commands.py
index 424ed0d..81ad285 100644
--- a/pySim/commands.py
+++ b/pySim/commands.py
@@ -642,3 +642,8 @@
     def get_data(self, tag: int, cla: int = 0x00):
         data, sw = self._tp.send_apdu('%02xca%04x00' % (cla, tag))
         return (data, sw)
+
+    # TS 31.102 Section 7.5.2
+    def get_identity(self, context: int):
+        data, sw = self._tp.send_apdu_checksw('807800%02x00' % (context))
+        return (data, sw)
diff --git a/pySim/ts_31_102.py b/pySim/ts_31_102.py
index 14e7cae..d7e2817 100644
--- a/pySim/ts_31_102.py
+++ b/pySim/ts_31_102.py
@@ -1664,6 +1664,23 @@
             (data, sw) = self._cmd.card._scc.envelope(b2h(sms_dl.to_tlv()))
             self._cmd.poutput('SW: %s, data: %s' % (sw, data))
 
+        get_id_parser = argparse.ArgumentParser()
+        get_id_parser.add_argument("--nswo-context", action='store_true')
+
+        @cmd2.with_argparser(get_id_parser)
+        def do_get_identity(self, opts):
+            """Send a GET IDENTITY command to the card. This is part of the
+            procedure for "SUCI calculation performed on USIM" supported
+            by USIM with support for both EFT.USIM service 124 and 125."""
+            context = 0x01 # SUCI
+            if opts.nswo_context:
+                context = 0x02 # SUCI 5G NSWO
+            (data, sw) = self._cmd.card._scc.get_identity(context)
+            do = SUCI_TlvDataObject()
+            do.from_tlv(h2b(data))
+            do_d = do.to_dict()
+            self._cmd.poutput('SUCI TLV Data Object: %s' % do_d['suci__tlv_data_object'])
+
 
 # TS 31.102 Section 7.3
 sw_usim = {

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