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#!/usr/bin/env python
#
# Utility to write data from a Fairwaves SIM card DB to Osmocom HLR DB
#
# Copyright (C) 2017-2018 Alexander Chemeris <alexander.chemeris@gmail.com>
#
# 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 optparse import OptionParser
import os
import sys
import csv
#from pySim.utils import h2b
def h2b(s):
return ''.join([chr((int(x,16)<<4)+int(y,16)) for x,y in zip(s[0::2], s[1::2])])
def load_sim_db(filename):
sim_db = {}
with open(filename, 'r') as f:
reader = csv.reader(f, delimiter=' ')
# Skip the header
# reader.next()
for l in reader:
sim_db[l[0]] = l
return sim_db
def _dbi_binary_quote(s):
# Count usage of each char
cnt = {}
for c in s:
cnt[c] = cnt.get(c, 0) + 1
# Find best offset
e = 0
m = len(s)
for i in range(1, 256):
if i == 39:
continue
sum_ = cnt.get(i, 0) + cnt.get((i+1)&0xff, 0) + cnt.get((i+39)&0xff, 0)
if sum_ < m:
m = sum_
e = i
if m == 0: # No overhead ? use this !
break;
# Generate output
out = []
out.append( chr(e) ) # Offset
for c in s:
x = (256 + ord(c) - e) % 256
if x in (0, 1, 39):
out.append('\x01')
out.append(chr(x+1))
else:
out.append(chr(x))
return ''.join(out)
def write_key_hlr(opts, sim_data):
# SQLite3 OpenBSC HLR
import sqlite3
conn = sqlite3.connect(opts.hlr_db_filename)
imsi = sim_data[1]
ki = sim_data[8]
c = conn.execute('SELECT id FROM Subscriber WHERE imsi = ?', (imsi,))
sub_id = c.fetchone()
if sub_id is None:
print("IMSI %s is not found in the HLR" % (imsi,))
return None
sub_id = sub_id[0]
print("IMSI %s has ID %d, writing Ki %s" % (imsi, sub_id, ki))
# c = conn.execute(
# 'INSERT INTO Subscriber ' +
# '(imsi, name, extension, authorized, created, updated) ' +
# 'VALUES ' +
# '(?,?,?,1,datetime(\'now\'),datetime(\'now\'));',
# [
# params['imsi'],
# params['name'],
# '9' + params['iccid'][-5:-1]
# ],
# )
# sub_id = c.lastrowid
# c.close()
c = conn.execute(
'INSERT OR REPLACE INTO AuthKeys ' +
'(subscriber_id, algorithm_id, a3a8_ki)' +
'VALUES ' +
'(?,?,?)',
[ sub_id, 2, sqlite3.Binary(_dbi_binary_quote(h2b(ki))) ],
)
c = conn.execute(
'DELETE FROM AuthLastTuples WHERE subscriber_id = ?',
[ sub_id ],
)
conn.commit()
conn.close()
return True
def parse_options():
parser = OptionParser(usage="usage: %prog [options]",
description="Utility to write data from a Fairwaves SIM card DB to Osmocom HLR DB.")
parser.add_option("-s", "--sim-db", dest="sim_db_filename", type='string', metavar="FILE",
help="filename of a SIM DB to load keys from (space searated)",
default="sim_db.dat",
)
parser.add_option("-d", "--hlr", dest="hlr_db_filename", type='string', metavar="FILE",
help="filename of a HLR SQLite3 DB to write the keys to",
default="hlr.sqlite3",
)
(options, args) = parser.parse_args()
if args:
parser.error("Extraneous arguments")
return options
if __name__ == '__main__':
# Parse options
opts = parse_options()
print("Loading SIM DB ...")
sim_db = load_sim_db(opts.sim_db_filename)
for iccid, sim in sim_db.items():
write_key_hlr(opts, sim)
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