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1 HLR/AuC testing gateway for hostapd EAP-SIM/AKA database/authenticator
2
3 hlr_auc_gw is an example implementation of the EAP-SIM/AKA/AKA'
4 database/authentication gateway interface to HLR/AuC. It could be
5 replaced with an implementation of SS7 gateway to GSM/UMTS
6 authentication center (HLR/AuC). hostapd will send SIM/AKA
7 authentication queries over a UNIX domain socket to and external
8 program, e.g., hlr_auc_gw.
9
10 hlr_auc_gw can be configured with GSM and UMTS authentication data with
11 text files: GSM triplet file (see hostapd.sim_db) and Milenage file (see
12 hlr_auc_gw.milenage_db). Milenage parameters can be used to generate
13 dynamic authentication data for EAP-SIM, EAP-AKA, and EAP-AKA' while the
14 GSM triplet data is used for a more static configuration (e.g., triplets
15 extracted from a SIM card).
16
17 Alternatively, hlr_auc_gw can be built with support for an SQLite
18 database for more dynamic operations. This is enabled by adding
19 "CONFIG_SQLITE=y" into hostapd/.config before building hlr_auc_gw ("make
20 clean; make hlr_auc_gw" in this directory).
21
22 hostapd is configured to use hlr_auc_gw with the eap_sim_db parameter in
23 hostapd.conf (e.g., "eap_sim_db=unix:/tmp/hlr_auc_gw.sock"). hlr_auc_gw
24 is configured with command line parameters:
25
26 hlr_auc_gw [-hu] [-s<socket path>] [-g<triplet file>] [-m<milenage file>] \
27 [-D<DB file>] [-i<IND len in bits>]
28
29 options:
30 -h = show this usage help
31 -u = update SQN in Milenage file on exit
32 -s<socket path> = path for UNIX domain socket
33 (default: /tmp/hlr_auc_gw.sock)
34 -g<triplet file> = path for GSM authentication triplets
35 -m<milenage file> = path for Milenage keys
36 -D<DB file> = path to SQLite database
37 -i<IND len in bits> = IND length for SQN (default: 5)
38
39
40 The SQLite database can be initialized with sqlite, e.g., by running
41 following commands in "sqlite3 /path/to/hlr_auc_gw.db":
42
43 CREATE TABLE milenage(
44 imsi INTEGER PRIMARY KEY NOT NULL,
45 ki CHAR(32) NOT NULL,
46 opc CHAR(32) NOT NULL,
47 amf CHAR(4) NOT NULL,
48 sqn CHAR(12) NOT NULL
49 );
50 INSERT INTO milenage(imsi,ki,opc,amf,sqn) VALUES(
51 232010000000000,
52 '90dca4eda45b53cf0f12d7c9c3bc6a89',
53 'cb9cccc4b9258e6dca4760379fb82581',
54 '61df',
55 '000000000000'
56 );
57 INSERT INTO milenage(imsi,ki,opc,amf,sqn) VALUES(
58 555444333222111,
59 '5122250214c33e723a5dd523fc145fc0',
60 '981d464c7c52eb6e5036234984ad0bcf',
61 'c3ab',
62 '16f3b3f70fc1'
63 );
64
65
66 hostapd (EAP server) can also be configured to store the EAP-SIM/AKA
67 pseudonyms and reauth information into a SQLite database. This is
68 configured with the db parameter within the eap_sim_db configuration
69 option.
70
71
72 "hlr_auc_gw -D /path/to/hlr_auc_gw.db" can then be used to fetch
73 Milenage parameters based on IMSI from the database. The database can be
74 updated dynamically while hlr_auc_gw is running to add/remove/modify
75 entries.
76
77
78 Example configuration files for hostapd to operate as a RADIUS
79 authentication server for EAP-SIM/AKA/AKA':
80
81 hostapd.conf:
82
83 driver=none
84 radius_server_clients=hostapd.radius_clients
85 eap_server=1
86 eap_user_file=hostapd.eap_user
87 eap_sim_db=unix:/tmp/hlr_auc_gw.sock db=/tmp/eap_sim.db
88 eap_sim_aka_result_ind=1
89
90 hostapd.radius_clients:
91
92 0.0.0.0/0 radius
93
94 hostapd.eap_user:
95
96 "0"* AKA
97 "1"* SIM
98 "2"* AKA
99 "3"* SIM
100 "4"* AKA
101 "5"* SIM
102 "6"* AKA'
103 "7"* AKA'
104 "8"* AKA'