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BER-TLV EF support (command, filesystem, shell)

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This adds support for a new EF file type: BER-TLV files.  They are
different from transparent and linear fixed EFs in that they neither
operate on a byte stream nor fixed-sized records, but on BER-TLV encoded
objects.  One can specify a tag value, and the card will return the
entire TLV for that tag.

As indicated in the spec, the magic tag value 0x5C (92) will return a
list of tags existing in the file.

Change-Id: Ibfcce757dcd477fd0d6857f64fbb4346d6d62e63
This commit is contained in:
Harald Welte
2021-04-21 11:51:25 +02:00
parent fc4833ec20
commit 917d98c1a5
6 changed files with 301 additions and 7 deletions
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12
pySim-shell.py
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@@ -38,7 +38,7 @@ from pySim.exceptions import *
from pySim.commands import SimCardCommands
from pySim.transport import init_reader, ApduTracer, argparse_add_reader_args
from pySim.cards import card_detect, Card
from pySim.utils import h2b, swap_nibbles, rpad, h2s, JsonEncoder
from pySim.utils import h2b, swap_nibbles, rpad, b2h, h2s, JsonEncoder, bertlv_parse_one
from pySim.utils import dec_st, sanitize_pin_adm, tabulate_str_list, is_hex, boxed_heading_str
from pySim.card_handler import card_handler
@@ -256,11 +256,19 @@ class PySimCommands(CommandSet):
if structure == 'transparent':
result = self._cmd.rs.read_binary()
self._cmd.poutput("update_binary " + str(result[0]))
if structure == 'cyclic' or structure == 'linear_fixed':
elif structure == 'cyclic' or structure == 'linear_fixed':
num_of_rec = fd['num_of_rec']
for r in range(1, num_of_rec + 1):
result = self._cmd.rs.read_record(r)
self._cmd.poutput("update_record %d %s" % (r, str(result[0])))
elif structure == 'ber_tlv':
tags = self._cmd.rs.retrieve_tags()
for t in tags:
result = self._cmd.rs.retrieve_data(t)
(tag, l, val) = bertlv_parse_one(h2b(result[0]))
self._cmd.poutput("set_data 0x%02x %s" % (t, b2h(val)))
else:
raise RuntimeError('Unsupported structure "%s" of file "%s"' % (structure, filename))
except Exception as e:
bad_file_str = '/'.join(df_path_list) + "/" + str(filename) + ", " + str(e)
self._cmd.poutput("# bad file: %s" % bad_file_str)