HLR/AuC testing gateway for hostapd EAP-SIM/AKA database/authenticator
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hlr_auc_gw is an example implementation of the EAP-SIM/AKA/AKA'
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database/authentication gateway interface to HLR/AuC. It could be
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replaced with an implementation of SS7 gateway to GSM/UMTS
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authentication center (HLR/AuC). hostapd will send SIM/AKA
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authentication queries over a UNIX domain socket to and external
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program, e.g., hlr_auc_gw.
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hlr_auc_gw can be configured with GSM and UMTS authentication data with
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text files: GSM triplet file (see hostapd.sim_db) and Milenage file (see
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hlr_auc_gw.milenage_db). Milenage parameters can be used to generate
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dynamic authentication data for EAP-SIM, EAP-AKA, and EAP-AKA' while the
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GSM triplet data is used for a more static configuration (e.g., triplets
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extracted from a SIM card).
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Alternatively, hlr_auc_gw can be built with support for an SQLite
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database for more dynamic operations. This is enabled by adding
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"CONFIG_SQLITE=y" into hostapd/.config before building hlr_auc_gw ("make
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clean; make hlr_auc_gw" in this directory).
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hostapd is configured to use hlr_auc_gw with the eap_sim_db parameter in
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hostapd.conf (e.g., "eap_sim_db=unix:/tmp/hlr_auc_gw.sock"). hlr_auc_gw
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is configured with command line parameters:
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hlr_auc_gw [-hu] [-s<socket path>] [-g<triplet file>] [-m<milenage file>] \
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[-D<DB file>] [-i<IND len in bits>]
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options:
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-h = show this usage help
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-u = update SQN in Milenage file on exit
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-s<socket path> = path for UNIX domain socket
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(default: /tmp/hlr_auc_gw.sock)
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-g<triplet file> = path for GSM authentication triplets
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-m<milenage file> = path for Milenage keys
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-D<DB file> = path to SQLite database
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-i<IND len in bits> = IND length for SQN (default: 5)
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The SQLite database can be initialized with sqlite, e.g., by running
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following commands in "sqlite3 /path/to/hlr_auc_gw.db":
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CREATE TABLE milenage(
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imsi INTEGER PRIMARY KEY NOT NULL,
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ki CHAR(32) NOT NULL,
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opc CHAR(32) NOT NULL,
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amf CHAR(4) NOT NULL,
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sqn CHAR(12) NOT NULL
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);
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INSERT INTO milenage(imsi,ki,opc,amf,sqn) VALUES(
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232010000000000,
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'90dca4eda45b53cf0f12d7c9c3bc6a89',
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'cb9cccc4b9258e6dca4760379fb82581',
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'61df',
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'000000000000'
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);
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INSERT INTO milenage(imsi,ki,opc,amf,sqn) VALUES(
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555444333222111,
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'5122250214c33e723a5dd523fc145fc0',
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'981d464c7c52eb6e5036234984ad0bcf',
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'c3ab',
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'16f3b3f70fc1'
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);
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hostapd (EAP server) can also be configured to store the EAP-SIM/AKA
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pseudonyms and reauth information into a SQLite database. This is
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configured with the db parameter within the eap_sim_db configuration
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option.
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"hlr_auc_gw -D /path/to/hlr_auc_gw.db" can then be used to fetch
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Milenage parameters based on IMSI from the database. The database can be
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updated dynamically while hlr_auc_gw is running to add/remove/modify
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entries.
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Example configuration files for hostapd to operate as a RADIUS
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authentication server for EAP-SIM/AKA/AKA':
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hostapd.conf:
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driver=none
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radius_server_clients=hostapd.radius_clients
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eap_server=1
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eap_user_file=hostapd.eap_user
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eap_sim_db=unix:/tmp/hlr_auc_gw.sock db=/tmp/eap_sim.db
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eap_sim_aka_result_ind=1
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hostapd.radius_clients:
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0.0.0.0/0 radius
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hostapd.eap_user:
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"0"* AKA
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"1"* SIM
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"2"* AKA
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"3"* SIM
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"4"* AKA
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"5"* SIM
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"6"* AKA'
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"7"* AKA'
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"8"* AKA'
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