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filesystem: be more strict in method add_file() 

The file identifier of a file is strictly defined as a two digit
hexadecimal number. Do not allow adding child files that violate this
constraint.

Change-Id: I096907285b742e611d221b03ba067ea2522e7e52
Related: OS#4963
This commit is contained in:
Philipp Maier 2021-03-09 21:49:01 +01:00
parent d51d8b5575
commit 3aec871978
1 changed files with 3 additions and 1 deletions
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4
pySim/filesystem.py
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@ -31,7 +31,7 @@ import cmd2
from cmd2 import CommandSet, with_default_category, with_argparser
import argparse
from pySim.utils import sw_match, h2b, b2h
from pySim.utils import sw_match, h2b, b2h, is_hex
from pySim.exceptions import *
class CardFile(object):
@ -144,6 +144,8 @@ class CardDF(CardFile):
"""Add a child (DF/EF) to this DF"""
if not isinstance(child, CardFile):
raise TypeError("Expected a File instance")
if not is_hex(child.fid, minlen = 4, maxlen = 4):
raise ValueError("File name %s is not a valid fid" % (child.fid))
if child.name in CardFile.RESERVED_NAMES:
raise ValueError("File name %s is a reserved name" % (child.name))
if child.fid in CardFile.RESERVED_FIDS: