commit 278816251d3201d233d169fd4fbde821f13624db
author Harald Welte <laforge@osmocom.org> Wed Apr 21 11:16:31 2021 +0200
committer Harald Welte <laforge@osmocom.org> Sat Apr 24 11:43:04 2021 +0200
tree dce5ed63ea6bdb401a787b436ad01e16ce6f79c0
parent 71290077b99982cc327e083b946996b13596f15a

filesystem.py: Introduce place-holder for BER-TLV files

I always assumed BER-TLV files are transparent EF with BER-TLV contents.

However, this is wrong. ETS TS 102 221 Section 8.2.2.4 specifies them.

TS 102 221 Section 11.3 describes the specific RETRIEVE DATA, SET DATA
commands, which are not yet implemented in pySim.

Change-Id: Ie4701d9f72b05c8a5810e287e55a20f6ea86a574

pySim/filesystem.py

diff --git a/pySim/filesystem.py b/pySim/filesystem.py
index 1068930..dec521e 100644
--- a/pySim/filesystem.py
+++ b/pySim/filesystem.py
@@ -917,7 +917,13 @@
         return b''.join(chunks)
 
 
+class BerTlvEF(TransparentEF):
+    """BER-TLV EF (Entry File) in the smart card filesystem.
+    A BER-TLV EF is a binary file with a BER (Basic Encoding Rules) TLV structure
 
+    NOTE: We currently don't really support those, this class is simply a wrapper
+    around TransparentEF as a place-holder, so we can already define EFs of BER-TLV
+    type without fully supporting them."""
 
 
 class RuntimeState(object):

pySim/ts_31_103.py

diff --git a/pySim/ts_31_103.py b/pySim/ts_31_103.py
index baa4d25..d5641b3 100644
--- a/pySim/ts_31_103.py
+++ b/pySim/ts_31_103.py
@@ -146,12 +146,12 @@
         super().__init__(fid=fid, sfid=sfid, name=name, desc=desc)
 
 # TS 31.103 Section 4.2.18
-class EF_IMSConfigData(TransparentEF):
+class EF_IMSConfigData(BerTlvEF):
     def __init__(self, fid='6ff8', sfid=None, name='EF.IMSConfigData', desc='IMS Configuration Data'):
         super().__init__(fid=fid, sfid=sfid, name=name, desc=desc)
 
 # TS 31.103 Section 4.2.19
-class EF_XCAPConfigData(TransparentEF):
+class EF_XCAPConfigData(BerTlvEF):
     def __init__(self, fid='6ffc', sfid=None, name='EF.XCAPConfigData', desc='XCAP Configuration Data'):
         super().__init__(fid=fid, sfid=sfid, name=name, desc=desc)
 
@@ -161,7 +161,7 @@
         super().__init__(fid=fid, sfid=sfid, name=name, desc=desc)
 
 # TS 31.103 Section 4.2.21
-class EF_MuDMiDConfigData(TransparentEF):
+class EF_MuDMiDConfigData(BerTlvEF):
     def __init__(self, fid='6ffe', sfid=None, name='EF.MuDMiDConfigData',
                  desc='MuD and MiD Configuration Data'):
         super().__init__(fid=fid, sfid=sfid, name=name, desc=desc)