ts_102_221: Implement proper parsing of EF.DIR

EF.DIR can not only contain the AID + Label of TS 102 221, but can
also contain any of the DOs specified in ISO7816-4.  Let's imoplement
this based on the modern pySim.tlv parser

Change-Id: I875eb49e1f0370428c2eae69af84f5483bd5b1fc
Closes: OS#5410

pySim/iso7816_4.py

@@ -0,0 +1,62 @@
+# coding=utf-8
+"""Utilities / Functions related to ISO 7816-4
+
+(C) 2022 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 *
+from pySim.construct import *
+from pySim.utils import *
+from pySim.filesystem import *
+from pySim.tlv import *
+
+# Table 91 + Section 8.2.1.2
+class ApplicationId(BER_TLV_IE, tag=0x4f):
+    _construct = GreedyBytes
+
+# Table 91
+class ApplicationLabel(BER_TLV_IE, tag=0x50):
+    _construct = GreedyBytes
+
+# Table 91 + Section 5.3.1.2
+class FileReference(BER_TLV_IE, tag=0x51):
+    _construct = GreedyBytes
+
+# Table 91
+class CommandApdu(BER_TLV_IE, tag=0x52):
+    _construct = GreedyBytes
+
+# Table 91
+class DiscretionaryData(BER_TLV_IE, tag=0x53):
+    _construct = GreedyBytes
+
+# Table 91
+class DiscretionaryTemplate(BER_TLV_IE, tag=0x73):
+    _construct = GreedyBytes
+
+# Table 91 + RFC1738 / RFC2396
+class URL(BER_TLV_IE, tag=0x5f50):
+    _construct = GreedyString('ascii')
+
+# Table 91
+class ApplicationRelatedDOSet(BER_TLV_IE, tag=0x61):
+    _construct = GreedyBytes
+
+# Section 8.2.1.3 Application Template
+class ApplicationTemplate(BER_TLV_IE, tag=0x61, nested=[ApplicationId, ApplicationLabel, FileReference,
+                          CommandApdu, DiscretionaryData, DiscretionaryTemplate,URL,
+                          ApplicationRelatedDOSet]):
+    pass