Introduce GlobalPlatform SCP02 implementation

This implementation of GlobalPlatform SCP02 currently only supports
C-MAC and C-ENC, but no R-MAC or R-ENC yet.

The patch also introduces the notion of having a SCP instance associated
with a SimCardCommands instance.  It also adds the establish_scp0w and
release_scp shell commands to all GlobalPlatform Security Domains.

Change-Id: I56020382b9dfe8ba0f7c1c9f71eb1a9746bc5a27

tests/test_globalplatform.py

@@ -0,0 +1,68 @@
+#!/usr/bin/env python3
+
+# (C) 2023-2024 by Harald Welte <laforge@osmocom.org>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import unittest
+import logging
+
+from pySim.global_platform import *
+from pySim.global_platform.scp02 import SCP02
+from pySim.utils import b2h, h2b
+
+KIC = h2b('100102030405060708090a0b0c0d0e0f') # enc
+KID = h2b('101102030405060708090a0b0c0d0e0f') # MAC
+KIK = h2b('102102030405060708090a0b0c0d0e0f') # DEK
+ck_3des_70 = GpCardKeyset(0x20, KIC, KID, KIK)
+
+class SCP02_Auth_Test(unittest.TestCase):
+    host_challenge = h2b('40A62C37FA6304F8')
+    init_update_resp = h2b('00000000000000000000700200016B4524ABEE7CF32EA3838BC148F3')
+
+    def setUp(self):
+        self.scp02 = SCP02(card_keys=ck_3des_70)
+
+    def test_mutual_auth_success(self):
+        init_upd_cmd = self.scp02.gen_init_update_apdu(host_challenge=self.host_challenge)
+        self.assertEqual(b2h(init_upd_cmd).upper(), '805020000840A62C37FA6304F8')
+        self.scp02.parse_init_update_resp(self.init_update_resp)
+        ext_auth_cmd = self.scp02.gen_ext_auth_apdu()
+        self.assertEqual(b2h(ext_auth_cmd).upper(), '8482010010BA6961667737C5BCEBECE14C7D6A4376')
+
+    def test_mutual_auth_fail_card_cryptogram(self):
+        init_upd_cmd = self.scp02.gen_init_update_apdu(host_challenge=self.host_challenge)
+        self.assertEqual(b2h(init_upd_cmd).upper(), '805020000840A62C37FA6304F8')
+        wrong_init_update_resp = self.init_update_resp.copy()
+        wrong_init_update_resp[-1:] = b'\xff'
+        with self.assertRaises(ValueError):
+            self.scp02.parse_init_update_resp(wrong_init_update_resp)
+
+
+class SCP02_Test(unittest.TestCase):
+    host_challenge = h2b('40A62C37FA6304F8')
+    init_update_resp = h2b('00000000000000000000700200016B4524ABEE7CF32EA3838BC148F3')
+
+    def setUp(self):
+        self.scp02 = SCP02(card_keys=ck_3des_70)
+        init_upd_cmd = self.scp02.gen_init_update_apdu(host_challenge=self.host_challenge)
+        self.scp02.parse_init_update_resp(self.init_update_resp)
+        ext_auth_cmd = self.scp02.gen_ext_auth_apdu()
+
+    def test_mac_command(self):
+        wrapped = self.scp02.wrap_cmd_apdu(h2b('80f28002024f00'))
+        self.assertEqual(b2h(wrapped).upper(), '84F280020A4F00B21AAFA3EB2D1672')
+
+if __name__ == "__main__":
+	unittest.main()