Alexander Chemeris | 2322c1f | 2018-01-26 16:45:59 +0900 | [diff] [blame] | 1 | #!/usr/bin/env python |
| 2 | |
| 3 | # |
| 4 | # Utility to write data from a Fairwaves SIM card DB to Osmocom HLR DB |
| 5 | # |
| 6 | # Copyright (C) 2017-2018 Alexander Chemeris <alexander.chemeris@gmail.com> |
| 7 | # |
| 8 | # This program is free software: you can redistribute it and/or modify |
| 9 | # it under the terms of the GNU General Public License as published by |
| 10 | # the Free Software Foundation, either version 2 of the License, or |
| 11 | # (at your option) any later version. |
| 12 | # |
| 13 | # This program is distributed in the hope that it will be useful, |
| 14 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | # GNU General Public License for more details. |
| 17 | # |
| 18 | # You should have received a copy of the GNU General Public License |
| 19 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 20 | # |
| 21 | |
| 22 | from optparse import OptionParser |
| 23 | import os |
| 24 | import sys |
| 25 | import csv |
| 26 | |
| 27 | #from pySim.utils import h2b |
| 28 | def h2b(s): |
| 29 | return ''.join([chr((int(x,16)<<4)+int(y,16)) for x,y in zip(s[0::2], s[1::2])]) |
| 30 | |
| 31 | def load_sim_db(filename): |
| 32 | sim_db = {} |
| 33 | with open(filename, 'r') as f: |
| 34 | reader = csv.reader(f, delimiter=' ') |
| 35 | # Skip the header |
| 36 | # reader.next() |
| 37 | for l in reader: |
| 38 | sim_db[l[0]] = l |
| 39 | return sim_db |
| 40 | |
| 41 | def _dbi_binary_quote(s): |
| 42 | # Count usage of each char |
| 43 | cnt = {} |
| 44 | for c in s: |
| 45 | cnt[c] = cnt.get(c, 0) + 1 |
| 46 | |
| 47 | # Find best offset |
| 48 | e = 0 |
| 49 | m = len(s) |
| 50 | for i in range(1, 256): |
| 51 | if i == 39: |
| 52 | continue |
| 53 | sum_ = cnt.get(i, 0) + cnt.get((i+1)&0xff, 0) + cnt.get((i+39)&0xff, 0) |
| 54 | if sum_ < m: |
| 55 | m = sum_ |
| 56 | e = i |
| 57 | if m == 0: # No overhead ? use this ! |
| 58 | break; |
| 59 | |
| 60 | # Generate output |
| 61 | out = [] |
| 62 | out.append( chr(e) ) # Offset |
| 63 | for c in s: |
| 64 | x = (256 + ord(c) - e) % 256 |
| 65 | if x in (0, 1, 39): |
| 66 | out.append('\x01') |
| 67 | out.append(chr(x+1)) |
| 68 | else: |
| 69 | out.append(chr(x)) |
| 70 | |
| 71 | return ''.join(out) |
| 72 | |
| 73 | def write_key_hlr(opts, sim_data): |
| 74 | # SQLite3 OpenBSC HLR |
| 75 | import sqlite3 |
| 76 | conn = sqlite3.connect(opts.hlr_db_filename) |
| 77 | |
| 78 | imsi = sim_data[1] |
| 79 | ki = sim_data[8] |
| 80 | |
| 81 | c = conn.execute('SELECT id FROM Subscriber WHERE imsi = ?', (imsi,)) |
| 82 | sub_id = c.fetchone() |
| 83 | if sub_id is None: |
| 84 | print("IMSI %s is not found in the HLR" % (imsi,)) |
| 85 | return None |
| 86 | sub_id = sub_id[0] |
| 87 | print("IMSI %s has ID %d, writing Ki %s" % (imsi, sub_id, ki)) |
| 88 | |
| 89 | # c = conn.execute( |
| 90 | # 'INSERT INTO Subscriber ' + |
| 91 | # '(imsi, name, extension, authorized, created, updated) ' + |
| 92 | # 'VALUES ' + |
| 93 | # '(?,?,?,1,datetime(\'now\'),datetime(\'now\'));', |
| 94 | # [ |
| 95 | # params['imsi'], |
| 96 | # params['name'], |
| 97 | # '9' + params['iccid'][-5:-1] |
| 98 | # ], |
| 99 | # ) |
| 100 | # sub_id = c.lastrowid |
| 101 | # c.close() |
| 102 | |
| 103 | c = conn.execute( |
| 104 | 'INSERT OR REPLACE INTO AuthKeys ' + |
| 105 | '(subscriber_id, algorithm_id, a3a8_ki)' + |
| 106 | 'VALUES ' + |
| 107 | '(?,?,?)', |
| 108 | [ sub_id, 2, sqlite3.Binary(_dbi_binary_quote(h2b(ki))) ], |
| 109 | ) |
| 110 | |
| 111 | c = conn.execute( |
| 112 | 'DELETE FROM AuthLastTuples WHERE subscriber_id = ?', |
| 113 | [ sub_id ], |
| 114 | ) |
| 115 | |
| 116 | conn.commit() |
| 117 | conn.close() |
| 118 | return True |
| 119 | |
| 120 | |
| 121 | def parse_options(): |
| 122 | |
| 123 | parser = OptionParser(usage="usage: %prog [options]", |
| 124 | description="Utility to write data from a Fairwaves SIM card DB to Osmocom HLR DB.") |
| 125 | |
| 126 | parser.add_option("-s", "--sim-db", dest="sim_db_filename", type='string', metavar="FILE", |
| 127 | help="filename of a SIM DB to load keys from (space searated)", |
| 128 | default="sim_db.dat", |
| 129 | ) |
| 130 | parser.add_option("-d", "--hlr", dest="hlr_db_filename", type='string', metavar="FILE", |
| 131 | help="filename of a HLR SQLite3 DB to write the keys to", |
| 132 | default="hlr.sqlite3", |
| 133 | ) |
| 134 | |
| 135 | (options, args) = parser.parse_args() |
| 136 | |
| 137 | if args: |
| 138 | parser.error("Extraneous arguments") |
| 139 | |
| 140 | return options |
| 141 | |
| 142 | |
| 143 | if __name__ == '__main__': |
| 144 | |
| 145 | # Parse options |
| 146 | opts = parse_options() |
| 147 | |
| 148 | print("Loading SIM DB ...") |
| 149 | sim_db = load_sim_db(opts.sim_db_filename) |
| 150 | |
| 151 | for iccid, sim in sim_db.items(): |
| 152 | write_key_hlr(opts, sim) |
| 153 | |
| 154 | |