pySim.globalplatform: Add 'http' submodule for GP Amd B RAM over HTTPS

This implements the first parts of the "GlobalPlatform Remote Application Management over HTTP Card Specification v2.3 - Amendment B, Versoin 1.2". Specifically, this patch covers the TLV definitions for the OTA message used for HTTPS session triggering. This also adds some more unit test coverage to pySim.cat, based on real-world data that was captured nested inside the HTTPS Administration session triggering parameters. Change-Id: Ia7d7bd6df41bdf1249011bad9a9a38b7669edc54
2024-07-13 21:22:59 +02:00
parent 03194c0877
commit e18586ddf0
3 changed files with 109 additions and 0 deletions
--- a/pySim/global_platform/http.py
+++ b/pySim/global_platform/http.py
@@ -0,0 +1,93 @@
+"""GlobalPlatform Remote Application Management over HTTP Card Specification v2.3 - Amendment B.
+Also known as SCP81 for SIM/USIM/UICC/eUICC/eSIM OTA.
+"""
+
+# (C) 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/>.
+
+from construct import Struct, Int8ub, Int16ub, Bytes, GreedyBytes, GreedyString, BytesInteger
+from construct import this, len_, Rebuild, Const
+from construct import Optional as COptional
+
+from pySim.tlv import BER_TLV_IE
+from pySim import cat
+
+
+# Table 3-3 + Section 3.8.1
+class RasConnectionParams(BER_TLV_IE, tag=0x84, nested=cat.OpenChannel.nested_collection_cls.possible_nested):
+    pass
+
+# Table 3-3 + Section 3.8.2
+class SecurityParams(BER_TLV_IE, tag=0x85):
+    _test_de_encode = [
+        ( '850804deadbeef020040', {'kid': 64,'kvn': 0, 'psk_id': b'\xde\xad\xbe\xef', 'sha_type': None} )
+    ]
+    _construct = Struct('_psk_id_len'/Rebuild(Int8ub, len_(this.psk_id)), 'psk_id'/Bytes(this._psk_id_len),
+                        '_kid_kvn_len'/Const(2, Int8ub), 'kvn'/Int8ub, 'kid'/Int8ub,
+                        'sha_type'/COptional(Int8ub))
+
+# Table 3-3 + ?
+class ExtendedSecurityParams(BER_TLV_IE, tag=0xA5):
+    _construct = GreedyBytes
+
+# Table 3-3 + Section 3.8.3
+class SessionRetryPolicyParams(BER_TLV_IE, tag=0x86):
+    _construct = Struct('retry_counter'/Int16ub,
+                        'retry_waiting_delay'/BytesInteger(5),
+                        'retry_report_failure'/COptional(GreedyBytes))
+
+# Table 3-3 + Section 3.8.4
+class AdminHostParam(BER_TLV_IE, tag=0x8A):
+    _test_de_encode = [
+        ( '8a0a61646d696e2e686f7374', 'admin.host' ),
+    ]
+    _construct = GreedyString('utf-8')
+
+# Table 3-3 + Section 3.8.5
+class AgentIdParam(BER_TLV_IE, tag=0x8B):
+    _construct = GreedyString('utf-8')
+
+# Table 3-3 + Section 3.8.6
+class AdminUriParam(BER_TLV_IE, tag=0x8C):
+    _test_de_encode = [
+        ( '8c1668747470733a2f2f61646d696e2e686f73742f757269', 'https://admin.host/uri' ),
+    ]
+    _construct = GreedyString('utf-8')
+
+# Table 3-3
+class HttpPostParams(BER_TLV_IE, tag=0x89, nested=[AdminHostParam, AgentIdParam, AdminUriParam]):
+    pass
+
+# Table 3-3
+class AdmSessionParams(BER_TLV_IE, tag=0x83, nested=[RasConnectionParams, SecurityParams,
+                                                     ExtendedSecurityParams, SessionRetryPolicyParams,
+                                                     HttpPostParams]):
+    pass
+
+# Table 3-3 + Section 3.11.4
+class RasFqdn(BER_TLV_IE, tag=0xD6):
+    _construct = GreedyBytes # FIXME: DNS String
+
+# Table 3-3 + Section 3.11.7
+class DnsConnectionParams(BER_TLV_IE, tag=0xFA, nested=cat.OpenChannel.nested_collection_cls.possible_nested):
+    pass
+
+# Table 3-3
+class DnsResolutionParams(BER_TLV_IE, tag=0xB3, nested=[RasFqdn, DnsConnectionParams]):
+    pass
+
+# Table 3-3
+class AdmSessTriggerParams(BER_TLV_IE, tag=0x81, nested=[AdmSessionParams, DnsResolutionParams]):
+    pass