osmo-msc/tests/msc_vlr/msc_vlr_test_gsm_ciph.c

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/* Osmocom MSC+VLR end-to-end tests */
/* (C) 2017 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
*
* All Rights Reserved
*
* Author: Neels Hofmeyr <nhofmeyr@sysmocom.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation; either version 3 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "msc_vlr_tests.h"
static void test_ciph()
{
struct vlr_subscr *vsub;
const char *imsi = "901700000004620";
comment_start();
/* implicit: net->authentication_required = true; */
net->a5_encryption_mask = (1 << 1);
btw("Location Update request causes a GSUP Send Auth Info request to HLR");
lu_result_sent = RES_NONE;
gsup_expect_tx("08010809710000004026f0");
ms_sends_msg("050802008168000130089910070000006402");
OSMO_ASSERT(gsup_tx_confirmed);
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS");
/* Based on a Ki of 000102030405060708090a0b0c0d0e0f */
auth_request_sent = false;
auth_request_expect_rand = "585df1ae287f6e273dce07090d61320b";
auth_request_expect_autn = NULL;
gsup_rx("0a"
/* imsi */
"0108" "09710000004026f0"
/* 5 auth vectors... */
/* TL TL rand */
"0322" "2010" "585df1ae287f6e273dce07090d61320b"
/* TL sres TL kc */
"2104" "2d8b2c3e" "2208" "61855fb81fc2a800"
"0322" "2010" "12aca96fb4ffdea5c985cbafa9b6e18b"
"2104" "20bde240" "2208" "07fa7502e07e1c00"
"0322" "2010" "e7c03ba7cf0e2fde82b2dc4d63077d42"
"2104" "a29514ae" "2208" "e2b234f807886400"
"0322" "2010" "fa8f20b781b5881329d4fea26b1a3c51"
"2104" "5afc8d72" "2208" "2392f14f709ae000"
"0322" "2010" "0fd4cc8dbe8715d1f439e304edfd68dc"
"2104" "bc8d1c5b" "2208" "da7cdd6bfe2d7000",
NULL);
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
VERBOSE_ASSERT(auth_request_sent, == true, "%d");
btw("MS sends Authen Response, VLR accepts and sends Ciphering Mode Command to MS");
expect_cipher_mode_cmd("61855fb81fc2a800");
ms_sends_msg("05542d8b2c3e");
OSMO_ASSERT(cipher_mode_cmd_sent);
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("needs ciph, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("MS sends Ciphering Mode Complete, VLR accepts and sends GSUP LU Req to HLR");
gsup_expect_tx("04010809710000004026f0280102");
ms_sends_msg("0632");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT");
gsup_rx("10010809710000004026f00804036470f1",
"12010809710000004026f0");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("HLR also sends GSUP _UPDATE_LOCATION_RESULT");
expect_bssap_clear();
gsup_rx("06010809710000004026f0", NULL);
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
btw("LU was successful, and the conn has already been closed");
VERBOSE_ASSERT(lu_result_sent, == RES_ACCEPT, "%d");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
BTW("after a while, a new conn sends a CM Service Request. VLR responds with Auth Req, 2nd auth vector");
cm_service_result_sent = RES_NONE;
auth_request_sent = false;
auth_request_expect_rand = "12aca96fb4ffdea5c985cbafa9b6e18b";
ms_sends_msg("05247803305886089910070000006402");
OSMO_ASSERT(g_conn);
OSMO_ASSERT(g_conn->fi);
OSMO_ASSERT(g_conn->vsub);
VERBOSE_ASSERT(auth_request_sent, == true, "%d");
VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
btw("needs auth, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("MS sends Authen Response, VLR accepts and requests Ciphering");
expect_cipher_mode_cmd("07fa7502e07e1c00");
ms_sends_msg("0554" "20bde240" /* 2nd vector's sres, s.a. */);
VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
VERBOSE_ASSERT(cipher_mode_cmd_sent, == true, "%d");
btw("needs ciph, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("MS sends Ciphering Mode Complete, VLR accepts; above Ciphering is an implicit CM Service Accept");
ms_sends_msg("0632");
VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
/* Release connection */
expect_bssap_clear(OSMO_RAT_GERAN_A);
conn_conclude_cm_service_req(g_conn, OSMO_RAT_GERAN_A);
btw("all requests serviced, conn has been released");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
BTW("an SMS is sent, MS is paged");
paging_expect_imsi(imsi);
paging_sent = false;
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 0, "%d");
send_sms(vsub, vsub,
"Privacy in residential applications is a desirable"
" marketing option.");
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 1, "%d");
vlr_subscr_put(vsub);
vsub = NULL;
VERBOSE_ASSERT(paging_sent, == true, "%d");
VERBOSE_ASSERT(paging_stopped, == false, "%d");
btw("the subscriber and its pending request should remain");
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 1, "%d");
vlr_subscr_put(vsub);
btw("MS replies with Paging Response, and VLR sends Auth Request with third key");
auth_request_sent = false;
auth_request_expect_rand = "e7c03ba7cf0e2fde82b2dc4d63077d42";
ms_sends_msg("06270703305882089910070000006402");
VERBOSE_ASSERT(auth_request_sent, == true, "%d");
btw("needs auth, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("MS sends Authen Response, VLR accepts and requests Ciphering");
expect_cipher_mode_cmd("e2b234f807886400");
ms_sends_msg("0554" "a29514ae" /* 3rd vector's sres, s.a. */);
VERBOSE_ASSERT(cipher_mode_cmd_sent, == true, "%d");
btw("needs ciph, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("MS sends Ciphering Mode Complete, VLR accepts and sends pending SMS");
dtap_expect_tx("09" /* SMS messages */
"01" /* CP-DATA */
"58" /* length */
"01" /* Network to MS */
"00" /* reference */
/* originator (gsm411_send_sms() hardcodes this weird nr) */
"0791" "447758100650" /* 447785016005 */
"00" /* dest */
/* SMS TPDU */
"4c" /* len */
"00" /* SMS deliver */
"05806470f1" /* originating address 46071 */
"00" /* TP-PID */
"00" /* GSM default alphabet */
"071010" /* Y-M-D (from wrapped gsm340_gen_scts())*/
"000000" /* H-M-S */
"00" /* GMT+0 */
"44" /* data length */
"5079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0e"
"d3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb"
"0c7ac3e9e9b7db05");
ms_sends_msg("0632");
VERBOSE_ASSERT(dtap_tx_confirmed, == true, "%d");
VERBOSE_ASSERT(paging_stopped, == true, "%d");
btw("SMS was delivered, no requests pending for subscr");
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 0, "%d");
vlr_subscr_put(vsub);
btw("conn is still open to wait for SMS ack dance");
EXPECT_CONN_COUNT(1);
btw("MS replies with CP-ACK for received SMS");
ms_sends_msg("8904");
EXPECT_CONN_COUNT(1);
btw("MS also sends RP-ACK, MSC in turn sends CP-ACK for that");
dtap_expect_tx("0904");
expect_bssap_clear();
ms_sends_msg("890106020041020000");
VERBOSE_ASSERT(dtap_tx_confirmed, == true, "%d");
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
btw("SMS is done, conn is gone");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
BTW("subscriber detaches");
expect_bssap_clear();
ms_sends_msg("050130089910070000006402");
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
clear_vlr();
comment_end();
}
static void test_ciph_tmsi()
{
struct vlr_subscr *vsub;
const char *imsi = "901700000004620";
comment_start();
/* implicit: net->authentication_required = true; */
net->a5_encryption_mask = (1 << 1);
net->vlr->cfg.assign_tmsi = true;
btw("Location Update request causes a GSUP Send Auth Info request to HLR");
lu_result_sent = RES_NONE;
gsup_expect_tx("08010809710000004026f0");
ms_sends_msg("050802008168000130089910070000006402");
OSMO_ASSERT(gsup_tx_confirmed);
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS");
/* Based on a Ki of 000102030405060708090a0b0c0d0e0f */
auth_request_sent = false;
auth_request_expect_rand = "585df1ae287f6e273dce07090d61320b";
auth_request_expect_autn = NULL;
gsup_rx("0a"
/* imsi */
"0108" "09710000004026f0"
/* 5 auth vectors... */
/* TL TL rand */
"0322" "2010" "585df1ae287f6e273dce07090d61320b"
/* TL sres TL kc */
"2104" "2d8b2c3e" "2208" "61855fb81fc2a800"
"0322" "2010" "12aca96fb4ffdea5c985cbafa9b6e18b"
"2104" "20bde240" "2208" "07fa7502e07e1c00"
"0322" "2010" "e7c03ba7cf0e2fde82b2dc4d63077d42"
"2104" "a29514ae" "2208" "e2b234f807886400"
"0322" "2010" "fa8f20b781b5881329d4fea26b1a3c51"
"2104" "5afc8d72" "2208" "2392f14f709ae000"
"0322" "2010" "0fd4cc8dbe8715d1f439e304edfd68dc"
"2104" "bc8d1c5b" "2208" "da7cdd6bfe2d7000",
NULL);
VERBOSE_ASSERT(auth_request_sent, == true, "%d");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("MS sends Authen Response, VLR accepts and sends Ciphering Mode Command to MS");
expect_cipher_mode_cmd("61855fb81fc2a800");
ms_sends_msg("05542d8b2c3e");
OSMO_ASSERT(cipher_mode_cmd_sent);
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
VERBOSE_ASSERT(auth_request_sent, == true, "%d");
btw("needs ciph, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("MS sends Ciphering Mode Complete, VLR accepts and sends GSUP LU Req to HLR");
gsup_expect_tx("04010809710000004026f0280102");
ms_sends_msg("0632");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT");
gsup_rx("10010809710000004026f00804036470f1",
"12010809710000004026f0");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("HLR also sends GSUP _UPDATE_LOCATION_RESULT");
gsup_rx("06010809710000004026f0", NULL);
btw("a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl");
EXPECT_CONN_COUNT(1);
VERBOSE_ASSERT(lu_result_sent, == RES_ACCEPT, "%d");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("even though the TMSI is not acked, we can already find the subscr with it");
vsub = vlr_subscr_find_by_tmsi(net->vlr, 0x03020100);
VERBOSE_ASSERT(vsub != NULL, == true, "%d");
VERBOSE_ASSERT(strcmp(vsub->imsi, imsi), == 0, "%d");
VERBOSE_ASSERT(vsub->tmsi_new, == 0x03020100, "0x%08x");
VERBOSE_ASSERT(vsub->tmsi, == GSM_RESERVED_TMSI, "0x%08x");
vlr_subscr_put(vsub);
btw("MS sends TMSI Realloc Complete");
expect_bssap_clear();
ms_sends_msg("055b");
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
btw("LU was successful, and the conn has already been closed");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
btw("Subscriber has the new TMSI");
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
VERBOSE_ASSERT(vsub != NULL, == true, "%d");
VERBOSE_ASSERT(strcmp(vsub->imsi, imsi), == 0, "%d");
VERBOSE_ASSERT(vsub->tmsi_new, == GSM_RESERVED_TMSI, "0x%08x");
VERBOSE_ASSERT(vsub->tmsi, == 0x03020100, "0x%08x");
vlr_subscr_put(vsub);
BTW("after a while, a new conn sends a CM Service Request using above TMSI. VLR responds with Auth Req, 2nd auth vector");
cm_service_result_sent = RES_NONE;
auth_request_sent = false;
auth_request_expect_rand = "12aca96fb4ffdea5c985cbafa9b6e18b";
auth_request_expect_autn = NULL;
ms_sends_msg("05247803305886" "05f4" "03020100");
OSMO_ASSERT(g_conn);
OSMO_ASSERT(g_conn->fi);
OSMO_ASSERT(g_conn->vsub);
VERBOSE_ASSERT(auth_request_sent, == true, "%d");
VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
btw("needs auth, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("MS sends Authen Response, VLR accepts and requests Ciphering");
expect_cipher_mode_cmd("07fa7502e07e1c00");
ms_sends_msg("0554" "20bde240" /* 2nd vector's sres, s.a. */);
VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
VERBOSE_ASSERT(cipher_mode_cmd_sent, == true, "%d");
btw("needs ciph, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("MS sends Ciphering Mode Complete, VLR accepts; above Ciphering is an implicit CM Service Accept");
ms_sends_msg("0632");
VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
/* Release connection */
expect_bssap_clear(OSMO_RAT_GERAN_A);
conn_conclude_cm_service_req(g_conn, OSMO_RAT_GERAN_A);
btw("all requests serviced, conn has been released");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
BTW("an SMS is sent, MS is paged");
paging_expect_tmsi(0x03020100);
paging_sent = false;
vsub = vlr_subscr_find_by_tmsi(net->vlr, 0x03020100);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 0, "%d");
send_sms(vsub, vsub,
"Privacy in residential applications is a desirable"
" marketing option.");
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 1, "%d");
vlr_subscr_put(vsub);
vsub = NULL;
VERBOSE_ASSERT(paging_sent, == true, "%d");
VERBOSE_ASSERT(paging_stopped, == false, "%d");
btw("the subscriber and its pending request should remain");
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 1, "%d");
vlr_subscr_put(vsub);
btw("MS replies with Paging Response using TMSI, and VLR sends Auth Request with third key");
auth_request_sent = false;
auth_request_expect_rand = "e7c03ba7cf0e2fde82b2dc4d63077d42";
ms_sends_msg("06270703305882" "05f4" "03020100");
VERBOSE_ASSERT(auth_request_sent, == true, "%d");
btw("needs auth, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("MS sends Authen Response, VLR accepts and requests Ciphering");
expect_cipher_mode_cmd("e2b234f807886400");
ms_sends_msg("0554" "a29514ae" /* 3rd vector's sres, s.a. */);
VERBOSE_ASSERT(cipher_mode_cmd_sent, == true, "%d");
btw("needs ciph, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("MS sends Ciphering Mode Complete, VLR accepts and sends pending SMS");
dtap_expect_tx("09" /* SMS messages */
"01" /* CP-DATA */
"58" /* length */
"01" /* Network to MS */
"00" /* reference */
/* originator (gsm411_send_sms() hardcodes this weird nr) */
"0791" "447758100650" /* 447785016005 */
"00" /* dest */
/* SMS TPDU */
"4c" /* len */
"00" /* SMS deliver */
"05806470f1" /* originating address 46071 */
"00" /* TP-PID */
"00" /* GSM default alphabet */
"071010" /* Y-M-D (from wrapped gsm340_gen_scts())*/
"000000" /* H-M-S */
"00" /* GMT+0 */
"44" /* data length */
"5079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0e"
"d3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb"
"0c7ac3e9e9b7db05");
ms_sends_msg("0632");
VERBOSE_ASSERT(dtap_tx_confirmed, == true, "%d");
VERBOSE_ASSERT(paging_stopped, == true, "%d");
btw("SMS was delivered, no requests pending for subscr");
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 0, "%d");
vlr_subscr_put(vsub);
btw("conn is still open to wait for SMS ack dance");
EXPECT_CONN_COUNT(1);
btw("MS replies with CP-ACK for received SMS");
ms_sends_msg("8904");
EXPECT_CONN_COUNT(1);
btw("MS also sends RP-ACK, MSC in turn sends CP-ACK for that");
dtap_expect_tx("0904");
expect_bssap_clear();
ms_sends_msg("890106020041020000");
VERBOSE_ASSERT(dtap_tx_confirmed, == true, "%d");
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
btw("SMS is done, conn is gone");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
BTW("subscriber detaches, using TMSI");
expect_bssap_clear();
ms_sends_msg("050130" "05f4" "03020100");
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
clear_vlr();
comment_end();
}
static void test_ciph_imei()
{
struct vlr_subscr *vsub;
const char *imsi = "901700000004620";
comment_start();
/* implicit: net->authentication_required = true; */
net->a5_encryption_mask = (1 << 1);
net->vlr->cfg.check_imei_rqd = true;
btw("Location Update request causes a GSUP Send Auth Info request to HLR");
lu_result_sent = RES_NONE;
gsup_expect_tx("08010809710000004026f0");
ms_sends_msg("050802008168000130089910070000006402");
OSMO_ASSERT(gsup_tx_confirmed);
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS");
/* Based on a Ki of 000102030405060708090a0b0c0d0e0f */
auth_request_sent = false;
auth_request_expect_rand = "585df1ae287f6e273dce07090d61320b";
auth_request_expect_autn = NULL;
gsup_rx("0a"
/* imsi */
"0108" "09710000004026f0"
/* 5 auth vectors... */
/* TL TL rand */
"0322" "2010" "585df1ae287f6e273dce07090d61320b"
/* TL sres TL kc */
"2104" "2d8b2c3e" "2208" "61855fb81fc2a800"
"0322" "2010" "12aca96fb4ffdea5c985cbafa9b6e18b"
"2104" "20bde240" "2208" "07fa7502e07e1c00"
"0322" "2010" "e7c03ba7cf0e2fde82b2dc4d63077d42"
"2104" "a29514ae" "2208" "e2b234f807886400"
"0322" "2010" "fa8f20b781b5881329d4fea26b1a3c51"
"2104" "5afc8d72" "2208" "2392f14f709ae000"
"0322" "2010" "0fd4cc8dbe8715d1f439e304edfd68dc"
"2104" "bc8d1c5b" "2208" "da7cdd6bfe2d7000",
NULL);
VERBOSE_ASSERT(auth_request_sent, == true, "%d");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("MS sends Authen Response, VLR accepts and sends Ciphering Mode Command to MS");
expect_cipher_mode_cmd("61855fb81fc2a800");
ms_sends_msg("05542d8b2c3e");
OSMO_ASSERT(cipher_mode_cmd_sent);
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("needs ciph, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("MS sends Ciphering Mode Complete, VLR accepts and sends GSUP LU Req to HLR");
gsup_expect_tx("04010809710000004026f0280102");
ms_sends_msg("0632");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT");
gsup_rx("10010809710000004026f00804036470f1",
"12010809710000004026f0");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("HLR also sends GSUP _UPDATE_LOCATION_RESULT, and we send an ID Request for the IMEI to the MS");
dtap_expect_tx("051802");
gsup_rx("06010809710000004026f0", NULL);
btw("We will only do business when the IMEI is known");
EXPECT_CONN_COUNT(1);
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(vsub->imei[0], == 0, "%d");
vlr_subscr_put(vsub);
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("MS replies with an Identity Response, VLR sends the IMEI to HLR");
gsup_expect_tx("30010809710000004026f050090824433224433224f0");
ms_sends_msg("0559084a32244332244302");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("HLR accepts the IMEI");
expect_bssap_clear();
gsup_rx("32010809710000004026f0510100", NULL);
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
btw("LU was successful, and the conn has already been closed");
VERBOSE_ASSERT(lu_result_sent, == RES_ACCEPT, "%d");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
btw("Subscriber has the IMEI");
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(strcmp(vsub->imei, "423423423423420"), == 0, "%d");
vlr_subscr_put(vsub);
BTW("subscriber detaches");
expect_bssap_clear();
ms_sends_msg("050130089910070000006402");
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
clear_vlr();
comment_end();
}
static void test_ciph_imeisv()
{
struct vlr_subscr *vsub;
const char *imsi = "901700000004620";
comment_start();
/* implicit: net->authentication_required = true; */
net->a5_encryption_mask = (1 << 1);
net->vlr->cfg.retrieve_imeisv_ciphered = true;
btw("Location Update request causes a GSUP Send Auth Info request to HLR");
lu_result_sent = RES_NONE;
gsup_expect_tx("08010809710000004026f0");
ms_sends_msg("050802008168000130089910070000006402");
OSMO_ASSERT(gsup_tx_confirmed);
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS");
/* Based on a Ki of 000102030405060708090a0b0c0d0e0f */
auth_request_sent = false;
auth_request_expect_rand = "585df1ae287f6e273dce07090d61320b";
auth_request_expect_autn = NULL;
gsup_rx("0a"
/* imsi */
"0108" "09710000004026f0"
/* 5 auth vectors... */
/* TL TL rand */
"0322" "2010" "585df1ae287f6e273dce07090d61320b"
/* TL sres TL kc */
"2104" "2d8b2c3e" "2208" "61855fb81fc2a800"
"0322" "2010" "12aca96fb4ffdea5c985cbafa9b6e18b"
"2104" "20bde240" "2208" "07fa7502e07e1c00"
"0322" "2010" "e7c03ba7cf0e2fde82b2dc4d63077d42"
"2104" "a29514ae" "2208" "e2b234f807886400"
"0322" "2010" "fa8f20b781b5881329d4fea26b1a3c51"
"2104" "5afc8d72" "2208" "2392f14f709ae000"
"0322" "2010" "0fd4cc8dbe8715d1f439e304edfd68dc"
"2104" "bc8d1c5b" "2208" "da7cdd6bfe2d7000",
NULL);
VERBOSE_ASSERT(auth_request_sent, == true, "%d");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("MS sends Authen Response, VLR accepts and sends Ciphering Mode Command to MS");
expect_cipher_mode_cmd("61855fb81fc2a800");
ms_sends_msg("05542d8b2c3e");
VERBOSE_ASSERT(cipher_mode_cmd_sent, == true, "%d");
VERBOSE_ASSERT(cipher_mode_cmd_sent_with_imeisv, == true, "%d");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("needs ciph, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(vsub->imeisv[0], == 0, "%d");
vlr_subscr_put(vsub);
btw("MS sends Ciphering Mode Complete with IMEISV, VLR accepts and sends GSUP LU Req to HLR");
gsup_expect_tx("04010809710000004026f0280102");
ms_sends_msg("063217094b32244332244372f5");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("Subscriber has the IMEISV");
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(strcmp(vsub->imeisv, "4234234234234275"), == 0, "%d");
vlr_subscr_put(vsub);
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT");
gsup_rx("10010809710000004026f00804036470f1",
"12010809710000004026f0");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("HLR also sends GSUP _UPDATE_LOCATION_RESULT");
expect_bssap_clear();
gsup_rx("06010809710000004026f0", NULL);
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
btw("LU was successful, and the conn has already been closed");
VERBOSE_ASSERT(lu_result_sent, == RES_ACCEPT, "%d");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
BTW("subscriber detaches");
expect_bssap_clear();
ms_sends_msg("050130089910070000006402");
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
clear_vlr();
comment_end();
}
static void test_ciph_tmsi_imei()
{
struct vlr_subscr *vsub;
const char *imsi = "901700000004620";
comment_start();
/* implicit: net->authentication_required = true; */
net->a5_encryption_mask = (1 << 1);
net->vlr->cfg.assign_tmsi = true;
net->vlr->cfg.check_imei_rqd = true;
btw("Location Update request causes a GSUP Send Auth Info request to HLR");
lu_result_sent = RES_NONE;
gsup_expect_tx("08010809710000004026f0");
ms_sends_msg("050802008168000130089910070000006402");
OSMO_ASSERT(gsup_tx_confirmed);
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS");
/* Based on a Ki of 000102030405060708090a0b0c0d0e0f */
auth_request_sent = false;
auth_request_expect_rand = "585df1ae287f6e273dce07090d61320b";
auth_request_expect_autn = NULL;
gsup_rx("0a"
/* imsi */
"0108" "09710000004026f0"
/* 5 auth vectors... */
/* TL TL rand */
"0322" "2010" "585df1ae287f6e273dce07090d61320b"
/* TL sres TL kc */
"2104" "2d8b2c3e" "2208" "61855fb81fc2a800"
"0322" "2010" "12aca96fb4ffdea5c985cbafa9b6e18b"
"2104" "20bde240" "2208" "07fa7502e07e1c00"
"0322" "2010" "e7c03ba7cf0e2fde82b2dc4d63077d42"
"2104" "a29514ae" "2208" "e2b234f807886400"
"0322" "2010" "fa8f20b781b5881329d4fea26b1a3c51"
"2104" "5afc8d72" "2208" "2392f14f709ae000"
"0322" "2010" "0fd4cc8dbe8715d1f439e304edfd68dc"
"2104" "bc8d1c5b" "2208" "da7cdd6bfe2d7000",
NULL);
VERBOSE_ASSERT(auth_request_sent, == true, "%d");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("MS sends Authen Response, VLR accepts and sends Ciphering Mode Command to MS");
expect_cipher_mode_cmd("61855fb81fc2a800");
ms_sends_msg("05542d8b2c3e");
OSMO_ASSERT(cipher_mode_cmd_sent);
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("needs ciph, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("MS sends Ciphering Mode Complete, VLR accepts and sends GSUP LU Req to HLR");
gsup_expect_tx("04010809710000004026f0280102");
ms_sends_msg("0632");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT");
gsup_rx("10010809710000004026f00804036470f1",
"12010809710000004026f0");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("HLR also sends GSUP _UPDATE_LOCATION_RESULT, and we send an ID Request for the IMEI to the MS");
dtap_expect_tx("051802");
gsup_rx("06010809710000004026f0", NULL);
btw("We will only do business when the IMEI is known");
EXPECT_CONN_COUNT(1);
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(vsub->imei[0], == 0, "%d");
vlr_subscr_put(vsub);
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("MS replies with an Identity Response, VLR sends the IMEI to HLR");
gsup_expect_tx("30010809710000004026f050090824433224433224f0");
ms_sends_msg("0559084a32244332244302");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("HLR accepts the IMEI");
gsup_rx("32010809710000004026f0510100", NULL);
btw("a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl");
EXPECT_CONN_COUNT(1);
VERBOSE_ASSERT(lu_result_sent, == RES_ACCEPT, "%d");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("even though the TMSI is not acked, we can already find the subscr with it");
vsub = vlr_subscr_find_by_tmsi(net->vlr, 0x03020100);
VERBOSE_ASSERT(vsub != NULL, == true, "%d");
VERBOSE_ASSERT(strcmp(vsub->imsi, imsi), == 0, "%d");
VERBOSE_ASSERT(vsub->tmsi_new, == 0x03020100, "0x%08x");
VERBOSE_ASSERT(vsub->tmsi, == GSM_RESERVED_TMSI, "0x%08x");
vlr_subscr_put(vsub);
btw("MS sends TMSI Realloc Complete");
expect_bssap_clear();
ms_sends_msg("055b");
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
btw("LU was successful, and the conn has already been closed");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
btw("Subscriber has the IMEI and TMSI");
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(strcmp(vsub->imei, "423423423423420"), == 0, "%d");
VERBOSE_ASSERT(vsub->tmsi, == 0x03020100, "0x%08x");
vlr_subscr_put(vsub);
BTW("subscriber detaches, using TMSI");
expect_bssap_clear();
ms_sends_msg("050130" "05f4" "03020100");
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
clear_vlr();
comment_end();
}
static void test_gsm_ciph_in_umts_env()
{
struct vlr_subscr *vsub;
const char *imsi = "901700000010650";
const char *sms =
"09" /* SMS messages */
"01" /* CP-DATA */
"58" /* length */
"01" /* Network to MS */
"00" /* reference */
/* originator (gsm411_send_sms() hardcodes this weird nr) */
"0791" "447758100650" /* 447785016005 */
"00" /* dest */
/* SMS TPDU */
"4c" /* len */
"00" /* SMS deliver */
"05802443f2" /* originating address 42342 */
"00" /* TP-PID */
"00" /* GSM default alphabet */
"071010" /* Y-M-D (from wrapped gsm340_gen_scts())*/
"000000" /* H-M-S */
"00" /* GMT+0 */
"44" /* data length */
"5079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0e"
"d3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb"
"0c7ac3e9e9b7db05";
comment_start();
/* implicit: net->authentication_required = true; */
net->a5_encryption_mask = (1 << 1);
rx_from_ran = OSMO_RAT_GERAN_A;
btw("Location Update request causes a GSUP Send Auth Info request to HLR");
lu_result_sent = RES_NONE;
gsup_expect_tx("080108" "09710000000156f0");
ms_sends_msg("0508" /* MM LU */
"7" /* ciph key seq: no key available */
"0" /* LU type: normal */
"ffffff" "0000" /* LAI, LAC */
"57" /* classmark 1: R99, early classmark, no power lvl */
"089910070000106005" /* IMSI */
"3303575886" /* classmark 2 */
);
OSMO_ASSERT(gsup_tx_confirmed);
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends *UMTS AKA* Auth Req to MS");
/* based on
* 2G auth: COMP128v1
* KI=7bcd108be4c3d551ee6c67faaf52bd68
* 3G auth: MILENAGE
* K=7bcd108be4c3d551ee6c67faaf52bd68
* OPC=6e23f641ce724679b73d933515a8589d
* IND-bitlen=5 last-SQN=641
* Note that the SRES will be calculated by COMP128v1, separately from 3G tokens;
* the resulting Kc to use for ciphering returned by the HLR is also calculated from COMP128v1.
*/
auth_request_sent = false;
auth_request_expect_rand = "4ac8d1cd1a51937597ca1016fe69a0fa";
auth_request_expect_autn = "2d837d2b0d6f00004b282d5acf23428d";
gsup_rx("0a"
/* imsi */
"0108" "09710000000156f0"
/* 5 auth vectors... */
/* TL TL rand */
"0362" "2010" "4ac8d1cd1a51937597ca1016fe69a0fa"
/* TL sres TL kc */
"2104" "dacc4b26" "2208" "7a75f0ac9b844400"
/* TL 3G IK */
"2310" "3747da4e31545baa2db59e500bdae047"
/* TL 3G CK */
"2410" "8544d35b945ccba01a7f1293575291c3"
/* TL AUTN */
"2510" "2d837d2b0d6f00004b282d5acf23428d"
/* TL RES */
"2708" "37527064741f8ddb"
/* TL TL rand */
"0362" "2010" "b2661531b97b12c5a2edc21a0ed16fc5"
"2104" "2fb4cfad" "2208" "da149b11d473f400"
"2310" "3fe013b1a428ea737c37f8f0288c8edf"
"2410" "f275438c02b97e4d6f639dddda3d10b9"
"2510" "78cdd96c60840000322f421b3bb778b1"
"2708" "ed3ebf9cb6ea48ed"
"0362" "2010" "54d8f19778056666b41c8c25e52eb60c"
"2104" "0ff61e0f" "2208" "26ec67fad3073000"
"2310" "2868b0922c652616f1c975e3eaf7943a"
"2410" "6a84a20b1bc13ec9840466406d2dd91e"
"2510" "53f3e5632b3d00008865dd54d49663f2"
"2708" "86e848a9e7ad8cd5"
"0362" "2010" "1f05607ff9c8984f46ad97f8c9a94982"
"2104" "91a36e3d" "2208" "5d84421884fdcc00"
"2310" "2171fef54b81e30c83a598a5e44f634c"
"2410" "f02d088697509827565b46938fece211"
"2510" "1b43bbf9815e00001cb9b2a9f6b8a77c"
"2708" "373e67d62e719c51"
"0362" "2010" "80d89a58a2a41050918caf68a4e93c64"
"2104" "a319f5f1" "2208" "883df2b867293000"
"2310" "fa5d70f929ff298efb160413698dc107"
"2410" "ae9a3d8ce70ce13bac297bdb91cd6c68"
"2510" "5c0dc2eeaefa0000396882a1fe2cf80b"
"2708" "65ab1cad216bfe87",
NULL);
VERBOSE_ASSERT(auth_request_sent, == true, "%d");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("MS sends *GSM AKA* Authen Response, VLR accepts and sends Ciphering Mode Command to MS");
expect_cipher_mode_cmd("7a75f0ac9b844400");
ms_sends_msg("0554" "dacc4b26");
OSMO_ASSERT(cipher_mode_cmd_sent);
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("MS sends Ciphering Mode Complete, VLR accepts and sends GSUP LU Req to HLR");
gsup_expect_tx("04010809710000000156f0280102");
ms_sends_msg("0632");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT");
gsup_rx("10010809710000000156f00804032443f2",
"12010809710000000156f0");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("HLR also sends GSUP _UPDATE_LOCATION_RESULT");
expect_bssap_clear();
gsup_rx("06010809710000000156f0", NULL);
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
btw("LU was successful, and the conn has already been closed");
VERBOSE_ASSERT(lu_result_sent, == RES_ACCEPT, "%d");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
BTW("after a while, a new conn sends a CM Service Request. VLR responds with *UMTS AKA* Auth Req, 2nd auth vector");
auth_request_sent = false;
auth_request_expect_rand = "b2661531b97b12c5a2edc21a0ed16fc5";
auth_request_expect_autn = "78cdd96c60840000322f421b3bb778b1";
cm_service_result_sent = RES_NONE;
ms_sends_msg("052478"
"03575886" /* classmark 2 */
"089910070000106005" /* IMSI */);
OSMO_ASSERT(g_conn);
OSMO_ASSERT(g_conn->fi);
OSMO_ASSERT(g_conn->vsub);
VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
VERBOSE_ASSERT(auth_request_sent, == true, "%d");
btw("needs auth, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("MS sends *GSM AKA* Authen Response, VLR accepts and requests Ciphering");
expect_cipher_mode_cmd("da149b11d473f400");
ms_sends_msg("0554" "2fb4cfad");
VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
VERBOSE_ASSERT(cipher_mode_cmd_sent, == true, "%d");
btw("MS sends Ciphering Mode Complete, VLR accepts; above Ciphering is an implicit CM Service Accept");
ms_sends_msg("0632");
VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
/* Release connection */
expect_bssap_clear(OSMO_RAT_GERAN_A);
conn_conclude_cm_service_req(g_conn, OSMO_RAT_GERAN_A);
btw("all requests serviced, conn has been released");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
BTW("an SMS is sent, MS is paged");
paging_expect_imsi(imsi);
paging_sent = false;
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 0, "%d");
send_sms(vsub, vsub,
"Privacy in residential applications is a desirable"
" marketing option.");
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 1, "%d");
vlr_subscr_put(vsub);
vsub = NULL;
VERBOSE_ASSERT(paging_sent, == true, "%d");
VERBOSE_ASSERT(paging_stopped, == false, "%d");
btw("the subscriber and its pending request should remain");
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 1, "%d");
vlr_subscr_put(vsub);
btw("MS replies with Paging Response, and VLR sends *UMTS AKA* Auth Request with third key");
auth_request_sent = false;
auth_request_expect_rand = "54d8f19778056666b41c8c25e52eb60c";
auth_request_expect_autn = "53f3e5632b3d00008865dd54d49663f2";
ms_sends_msg("062707"
"03575886" /* classmark 2 */
"089910070000106005" /* IMSI */);
VERBOSE_ASSERT(auth_request_sent, == true, "%d");
btw("needs auth, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("MS sends *GSM AKA* Authen Response, VLR accepts and requests Ciphering");
expect_cipher_mode_cmd("26ec67fad3073000");
ms_sends_msg("0554" "0ff61e0f");
VERBOSE_ASSERT(cipher_mode_cmd_sent, == true, "%d");
btw("MS sends Ciphering Mode Complete, VLR accepts and sends pending SMS");
dtap_expect_tx(sms);
ms_sends_msg("0632");
VERBOSE_ASSERT(dtap_tx_confirmed, == true, "%d");
VERBOSE_ASSERT(paging_stopped, == true, "%d");
btw("SMS was delivered, no requests pending for subscr");
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 0, "%d");
vlr_subscr_put(vsub);
btw("conn is still open to wait for SMS ack dance");
EXPECT_CONN_COUNT(1);
btw("MS replies with CP-ACK for received SMS");
ms_sends_msg("8904");
EXPECT_CONN_COUNT(1);
btw("MS also sends RP-ACK, MSC in turn sends CP-ACK for that");
dtap_expect_tx("0904");
expect_bssap_clear();
ms_sends_msg("890106020041020000");
VERBOSE_ASSERT(dtap_tx_confirmed, == true, "%d");
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
btw("SMS is done, conn is gone");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
BTW("subscriber detaches");
expect_bssap_clear();
ms_sends_msg("050130"
"089910070000106005" /* IMSI */);
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
clear_vlr();
comment_end();
}
A5/n Ciph: request Classmark Update if missing When the VLR requests a Ciphering Mode with vlr_ops.set_ciph_mode(), and if we need a ciph algo flag from a Classmark information that is not yet known (usually CM 2 during LU), send a BSSMAP Classmark Request to get it. To manage the intermission of the Classmark Request, add - msc_classmark_request_then_cipher_mode_cmd(), - state SUBSCR_CONN_S_WAIT_CLASSMARK_UPDATE, - event SUBSCR_CONN_E_CLASSMARK_UPDATE. From state AUTH_CIPH, switch to state WAIT_CLASSMARK_UPDATE. Once the BSSMAP Classmark Response, is received, switch back to SUBSCR_CONN_S_AUTH_CIPH and re-initiate Ciphering Mode. To be able to re-enter the Ciphering Mode algo decision, factor it out into msc_geran_set_cipher_mode(). Rationale: In the following commit, essentially we stopped supporting A5/3 ciphering: commit 71330720b6efdda2fcfd3e9c0cb45f89e32e5670 "MSC: Intersect configured A5 algorithms with MS-supported ones" Change-Id: Id124923ee52a357cb7d3e04d33f585214774f3a3 A5/3 was no longer supported because from that commit on, we strictly checked the MS-supported ciphers, but we did not have Classmark 2 available during Location Updating. This patch changes that: when Classmark 2 is missing, actively request it by a BSSMAP Classmark Request; continue Ciphering only after the Response. Always request missing Classmark, even if a lesser cipher were configured available. If the Classmark Update response fails to come in, cause an attach failure. Instead, we could attempt to use a lesser cipher that is also enabled. That is left as a future feature, should that become relevant. I think it's unlikely. Technically, we could now end up requesting a Classmark Updating both during LU (vlr_lu_fsm) and CM Service/Paging Response (proc_arq_fsm), but in practice the only time we lack a Classmark is: during Location Updating with A5/3 enabled. A5/1 support is indicated in CM1 which is always available, and A5/3 support is indicated in CM2, which is always available during CM Service Request as well as Paging Response. So this patch has practical relevance only for Location Updating. For networks that permit only A5/3, this patch fixes Location Updating. For networks that support A5/3 and A5/1, so far we always used A5/1 during LU, and after this patch we request CM2 and likely use A5/3 instead. In msc_vlr_test_gsm_ciph, verify that requesting Classmark 2 for A5/3 works during LU. Also verify that the lack of a Classmark Response results in attach failure. In msc_vlr_test_gsm_ciph, a hacky unit test fakes a situation where a CM2 is missing during proc_arq_fsm and proves that that code path works, even though the practical relevance is currently zero. It would only become interesting if ciphering algorithms A5/4 and higher became relevant, because support of those would be indicated in Classmark 3, which would always require a Classmark Request. Related: OS#3043 Depends: I4a2e1d3923e33912579c4180aa1ff8e8f5abb7e7 (libosmocore) Change-Id: I73c7cb6a86624695bd9c0f59abb72e2fdc655131
2018-09-13 01:23:07 +00:00
static void test_a5_3_supported()
{
A5/n Ciph: request Classmark Update if missing When the VLR requests a Ciphering Mode with vlr_ops.set_ciph_mode(), and if we need a ciph algo flag from a Classmark information that is not yet known (usually CM 2 during LU), send a BSSMAP Classmark Request to get it. To manage the intermission of the Classmark Request, add - msc_classmark_request_then_cipher_mode_cmd(), - state SUBSCR_CONN_S_WAIT_CLASSMARK_UPDATE, - event SUBSCR_CONN_E_CLASSMARK_UPDATE. From state AUTH_CIPH, switch to state WAIT_CLASSMARK_UPDATE. Once the BSSMAP Classmark Response, is received, switch back to SUBSCR_CONN_S_AUTH_CIPH and re-initiate Ciphering Mode. To be able to re-enter the Ciphering Mode algo decision, factor it out into msc_geran_set_cipher_mode(). Rationale: In the following commit, essentially we stopped supporting A5/3 ciphering: commit 71330720b6efdda2fcfd3e9c0cb45f89e32e5670 "MSC: Intersect configured A5 algorithms with MS-supported ones" Change-Id: Id124923ee52a357cb7d3e04d33f585214774f3a3 A5/3 was no longer supported because from that commit on, we strictly checked the MS-supported ciphers, but we did not have Classmark 2 available during Location Updating. This patch changes that: when Classmark 2 is missing, actively request it by a BSSMAP Classmark Request; continue Ciphering only after the Response. Always request missing Classmark, even if a lesser cipher were configured available. If the Classmark Update response fails to come in, cause an attach failure. Instead, we could attempt to use a lesser cipher that is also enabled. That is left as a future feature, should that become relevant. I think it's unlikely. Technically, we could now end up requesting a Classmark Updating both during LU (vlr_lu_fsm) and CM Service/Paging Response (proc_arq_fsm), but in practice the only time we lack a Classmark is: during Location Updating with A5/3 enabled. A5/1 support is indicated in CM1 which is always available, and A5/3 support is indicated in CM2, which is always available during CM Service Request as well as Paging Response. So this patch has practical relevance only for Location Updating. For networks that permit only A5/3, this patch fixes Location Updating. For networks that support A5/3 and A5/1, so far we always used A5/1 during LU, and after this patch we request CM2 and likely use A5/3 instead. In msc_vlr_test_gsm_ciph, verify that requesting Classmark 2 for A5/3 works during LU. Also verify that the lack of a Classmark Response results in attach failure. In msc_vlr_test_gsm_ciph, a hacky unit test fakes a situation where a CM2 is missing during proc_arq_fsm and proves that that code path works, even though the practical relevance is currently zero. It would only become interesting if ciphering algorithms A5/4 and higher became relevant, because support of those would be indicated in Classmark 3, which would always require a Classmark Request. Related: OS#3043 Depends: I4a2e1d3923e33912579c4180aa1ff8e8f5abb7e7 (libosmocore) Change-Id: I73c7cb6a86624695bd9c0f59abb72e2fdc655131
2018-09-13 01:23:07 +00:00
struct vlr_subscr *vsub;
const char *imsi = "901700000004620";
comment_start();
/* implicit: net->authentication_required = true; */
net->a5_encryption_mask = (1 << 3); /* A5/3 */
btw("Location Update request causes a GSUP Send Auth Info request to HLR");
lu_result_sent = RES_NONE;
gsup_expect_tx("08010809710000004026f0");
ms_sends_msg("050802008168000130089910070000006402");
OSMO_ASSERT(gsup_tx_confirmed);
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS");
/* Based on a Ki of 000102030405060708090a0b0c0d0e0f */
auth_request_sent = false;
auth_request_expect_rand = "585df1ae287f6e273dce07090d61320b";
auth_request_expect_autn = NULL;
gsup_rx("0a"
/* imsi */
"0108" "09710000004026f0"
/* 5 auth vectors... */
/* TL TL rand */
"0322" "2010" "585df1ae287f6e273dce07090d61320b"
/* TL sres TL kc */
"2104" "2d8b2c3e" "2208" "61855fb81fc2a800"
"0322" "2010" "12aca96fb4ffdea5c985cbafa9b6e18b"
"2104" "20bde240" "2208" "07fa7502e07e1c00"
"0322" "2010" "e7c03ba7cf0e2fde82b2dc4d63077d42"
"2104" "a29514ae" "2208" "e2b234f807886400"
"0322" "2010" "fa8f20b781b5881329d4fea26b1a3c51"
"2104" "5afc8d72" "2208" "2392f14f709ae000"
"0322" "2010" "0fd4cc8dbe8715d1f439e304edfd68dc"
"2104" "bc8d1c5b" "2208" "da7cdd6bfe2d7000",
NULL);
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
VERBOSE_ASSERT(auth_request_sent, == true, "%d");
BTW("MS sends Authen Response, VLR accepts and wants to send Ciphering Mode Command to MS"
A5/n Ciph: request Classmark Update if missing When the VLR requests a Ciphering Mode with vlr_ops.set_ciph_mode(), and if we need a ciph algo flag from a Classmark information that is not yet known (usually CM 2 during LU), send a BSSMAP Classmark Request to get it. To manage the intermission of the Classmark Request, add - msc_classmark_request_then_cipher_mode_cmd(), - state SUBSCR_CONN_S_WAIT_CLASSMARK_UPDATE, - event SUBSCR_CONN_E_CLASSMARK_UPDATE. From state AUTH_CIPH, switch to state WAIT_CLASSMARK_UPDATE. Once the BSSMAP Classmark Response, is received, switch back to SUBSCR_CONN_S_AUTH_CIPH and re-initiate Ciphering Mode. To be able to re-enter the Ciphering Mode algo decision, factor it out into msc_geran_set_cipher_mode(). Rationale: In the following commit, essentially we stopped supporting A5/3 ciphering: commit 71330720b6efdda2fcfd3e9c0cb45f89e32e5670 "MSC: Intersect configured A5 algorithms with MS-supported ones" Change-Id: Id124923ee52a357cb7d3e04d33f585214774f3a3 A5/3 was no longer supported because from that commit on, we strictly checked the MS-supported ciphers, but we did not have Classmark 2 available during Location Updating. This patch changes that: when Classmark 2 is missing, actively request it by a BSSMAP Classmark Request; continue Ciphering only after the Response. Always request missing Classmark, even if a lesser cipher were configured available. If the Classmark Update response fails to come in, cause an attach failure. Instead, we could attempt to use a lesser cipher that is also enabled. That is left as a future feature, should that become relevant. I think it's unlikely. Technically, we could now end up requesting a Classmark Updating both during LU (vlr_lu_fsm) and CM Service/Paging Response (proc_arq_fsm), but in practice the only time we lack a Classmark is: during Location Updating with A5/3 enabled. A5/1 support is indicated in CM1 which is always available, and A5/3 support is indicated in CM2, which is always available during CM Service Request as well as Paging Response. So this patch has practical relevance only for Location Updating. For networks that permit only A5/3, this patch fixes Location Updating. For networks that support A5/3 and A5/1, so far we always used A5/1 during LU, and after this patch we request CM2 and likely use A5/3 instead. In msc_vlr_test_gsm_ciph, verify that requesting Classmark 2 for A5/3 works during LU. Also verify that the lack of a Classmark Response results in attach failure. In msc_vlr_test_gsm_ciph, a hacky unit test fakes a situation where a CM2 is missing during proc_arq_fsm and proves that that code path works, even though the practical relevance is currently zero. It would only become interesting if ciphering algorithms A5/4 and higher became relevant, because support of those would be indicated in Classmark 3, which would always require a Classmark Request. Related: OS#3043 Depends: I4a2e1d3923e33912579c4180aa1ff8e8f5abb7e7 (libosmocore) Change-Id: I73c7cb6a86624695bd9c0f59abb72e2fdc655131
2018-09-13 01:23:07 +00:00
" -- but needs Classmark 2 to determine whether A5/3 is supported");
cipher_mode_cmd_sent = false;
A5/n Ciph: request Classmark Update if missing When the VLR requests a Ciphering Mode with vlr_ops.set_ciph_mode(), and if we need a ciph algo flag from a Classmark information that is not yet known (usually CM 2 during LU), send a BSSMAP Classmark Request to get it. To manage the intermission of the Classmark Request, add - msc_classmark_request_then_cipher_mode_cmd(), - state SUBSCR_CONN_S_WAIT_CLASSMARK_UPDATE, - event SUBSCR_CONN_E_CLASSMARK_UPDATE. From state AUTH_CIPH, switch to state WAIT_CLASSMARK_UPDATE. Once the BSSMAP Classmark Response, is received, switch back to SUBSCR_CONN_S_AUTH_CIPH and re-initiate Ciphering Mode. To be able to re-enter the Ciphering Mode algo decision, factor it out into msc_geran_set_cipher_mode(). Rationale: In the following commit, essentially we stopped supporting A5/3 ciphering: commit 71330720b6efdda2fcfd3e9c0cb45f89e32e5670 "MSC: Intersect configured A5 algorithms with MS-supported ones" Change-Id: Id124923ee52a357cb7d3e04d33f585214774f3a3 A5/3 was no longer supported because from that commit on, we strictly checked the MS-supported ciphers, but we did not have Classmark 2 available during Location Updating. This patch changes that: when Classmark 2 is missing, actively request it by a BSSMAP Classmark Request; continue Ciphering only after the Response. Always request missing Classmark, even if a lesser cipher were configured available. If the Classmark Update response fails to come in, cause an attach failure. Instead, we could attempt to use a lesser cipher that is also enabled. That is left as a future feature, should that become relevant. I think it's unlikely. Technically, we could now end up requesting a Classmark Updating both during LU (vlr_lu_fsm) and CM Service/Paging Response (proc_arq_fsm), but in practice the only time we lack a Classmark is: during Location Updating with A5/3 enabled. A5/1 support is indicated in CM1 which is always available, and A5/3 support is indicated in CM2, which is always available during CM Service Request as well as Paging Response. So this patch has practical relevance only for Location Updating. For networks that permit only A5/3, this patch fixes Location Updating. For networks that support A5/3 and A5/1, so far we always used A5/1 during LU, and after this patch we request CM2 and likely use A5/3 instead. In msc_vlr_test_gsm_ciph, verify that requesting Classmark 2 for A5/3 works during LU. Also verify that the lack of a Classmark Response results in attach failure. In msc_vlr_test_gsm_ciph, a hacky unit test fakes a situation where a CM2 is missing during proc_arq_fsm and proves that that code path works, even though the practical relevance is currently zero. It would only become interesting if ciphering algorithms A5/4 and higher became relevant, because support of those would be indicated in Classmark 3, which would always require a Classmark Request. Related: OS#3043 Depends: I4a2e1d3923e33912579c4180aa1ff8e8f5abb7e7 (libosmocore) Change-Id: I73c7cb6a86624695bd9c0f59abb72e2fdc655131
2018-09-13 01:23:07 +00:00
ms_sends_msg("05542d8b2c3e");
OSMO_ASSERT(!cipher_mode_cmd_sent);
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("BSC sends back a BSSMAP Classmark Update, that triggers the Ciphering Mode Command in A5/3");
expect_cipher_mode_cmd("61855fb81fc2a800");
bss_sends_bssap_mgmt("541203505886130b6014042f6503b8800d2100");
OSMO_ASSERT(cipher_mode_cmd_sent);
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("MS sends Ciphering Mode Complete, VLR accepts and sends GSUP LU Req to HLR");
gsup_expect_tx("04010809710000004026f0280102");
A5/n Ciph: request Classmark Update if missing When the VLR requests a Ciphering Mode with vlr_ops.set_ciph_mode(), and if we need a ciph algo flag from a Classmark information that is not yet known (usually CM 2 during LU), send a BSSMAP Classmark Request to get it. To manage the intermission of the Classmark Request, add - msc_classmark_request_then_cipher_mode_cmd(), - state SUBSCR_CONN_S_WAIT_CLASSMARK_UPDATE, - event SUBSCR_CONN_E_CLASSMARK_UPDATE. From state AUTH_CIPH, switch to state WAIT_CLASSMARK_UPDATE. Once the BSSMAP Classmark Response, is received, switch back to SUBSCR_CONN_S_AUTH_CIPH and re-initiate Ciphering Mode. To be able to re-enter the Ciphering Mode algo decision, factor it out into msc_geran_set_cipher_mode(). Rationale: In the following commit, essentially we stopped supporting A5/3 ciphering: commit 71330720b6efdda2fcfd3e9c0cb45f89e32e5670 "MSC: Intersect configured A5 algorithms with MS-supported ones" Change-Id: Id124923ee52a357cb7d3e04d33f585214774f3a3 A5/3 was no longer supported because from that commit on, we strictly checked the MS-supported ciphers, but we did not have Classmark 2 available during Location Updating. This patch changes that: when Classmark 2 is missing, actively request it by a BSSMAP Classmark Request; continue Ciphering only after the Response. Always request missing Classmark, even if a lesser cipher were configured available. If the Classmark Update response fails to come in, cause an attach failure. Instead, we could attempt to use a lesser cipher that is also enabled. That is left as a future feature, should that become relevant. I think it's unlikely. Technically, we could now end up requesting a Classmark Updating both during LU (vlr_lu_fsm) and CM Service/Paging Response (proc_arq_fsm), but in practice the only time we lack a Classmark is: during Location Updating with A5/3 enabled. A5/1 support is indicated in CM1 which is always available, and A5/3 support is indicated in CM2, which is always available during CM Service Request as well as Paging Response. So this patch has practical relevance only for Location Updating. For networks that permit only A5/3, this patch fixes Location Updating. For networks that support A5/3 and A5/1, so far we always used A5/1 during LU, and after this patch we request CM2 and likely use A5/3 instead. In msc_vlr_test_gsm_ciph, verify that requesting Classmark 2 for A5/3 works during LU. Also verify that the lack of a Classmark Response results in attach failure. In msc_vlr_test_gsm_ciph, a hacky unit test fakes a situation where a CM2 is missing during proc_arq_fsm and proves that that code path works, even though the practical relevance is currently zero. It would only become interesting if ciphering algorithms A5/4 and higher became relevant, because support of those would be indicated in Classmark 3, which would always require a Classmark Request. Related: OS#3043 Depends: I4a2e1d3923e33912579c4180aa1ff8e8f5abb7e7 (libosmocore) Change-Id: I73c7cb6a86624695bd9c0f59abb72e2fdc655131
2018-09-13 01:23:07 +00:00
ms_sends_msg("0632");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT");
gsup_rx("10010809710000004026f00804032443f2",
"12010809710000004026f0");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("HLR also sends GSUP _UPDATE_LOCATION_RESULT");
expect_bssap_clear();
A5/n Ciph: request Classmark Update if missing When the VLR requests a Ciphering Mode with vlr_ops.set_ciph_mode(), and if we need a ciph algo flag from a Classmark information that is not yet known (usually CM 2 during LU), send a BSSMAP Classmark Request to get it. To manage the intermission of the Classmark Request, add - msc_classmark_request_then_cipher_mode_cmd(), - state SUBSCR_CONN_S_WAIT_CLASSMARK_UPDATE, - event SUBSCR_CONN_E_CLASSMARK_UPDATE. From state AUTH_CIPH, switch to state WAIT_CLASSMARK_UPDATE. Once the BSSMAP Classmark Response, is received, switch back to SUBSCR_CONN_S_AUTH_CIPH and re-initiate Ciphering Mode. To be able to re-enter the Ciphering Mode algo decision, factor it out into msc_geran_set_cipher_mode(). Rationale: In the following commit, essentially we stopped supporting A5/3 ciphering: commit 71330720b6efdda2fcfd3e9c0cb45f89e32e5670 "MSC: Intersect configured A5 algorithms with MS-supported ones" Change-Id: Id124923ee52a357cb7d3e04d33f585214774f3a3 A5/3 was no longer supported because from that commit on, we strictly checked the MS-supported ciphers, but we did not have Classmark 2 available during Location Updating. This patch changes that: when Classmark 2 is missing, actively request it by a BSSMAP Classmark Request; continue Ciphering only after the Response. Always request missing Classmark, even if a lesser cipher were configured available. If the Classmark Update response fails to come in, cause an attach failure. Instead, we could attempt to use a lesser cipher that is also enabled. That is left as a future feature, should that become relevant. I think it's unlikely. Technically, we could now end up requesting a Classmark Updating both during LU (vlr_lu_fsm) and CM Service/Paging Response (proc_arq_fsm), but in practice the only time we lack a Classmark is: during Location Updating with A5/3 enabled. A5/1 support is indicated in CM1 which is always available, and A5/3 support is indicated in CM2, which is always available during CM Service Request as well as Paging Response. So this patch has practical relevance only for Location Updating. For networks that permit only A5/3, this patch fixes Location Updating. For networks that support A5/3 and A5/1, so far we always used A5/1 during LU, and after this patch we request CM2 and likely use A5/3 instead. In msc_vlr_test_gsm_ciph, verify that requesting Classmark 2 for A5/3 works during LU. Also verify that the lack of a Classmark Response results in attach failure. In msc_vlr_test_gsm_ciph, a hacky unit test fakes a situation where a CM2 is missing during proc_arq_fsm and proves that that code path works, even though the practical relevance is currently zero. It would only become interesting if ciphering algorithms A5/4 and higher became relevant, because support of those would be indicated in Classmark 3, which would always require a Classmark Request. Related: OS#3043 Depends: I4a2e1d3923e33912579c4180aa1ff8e8f5abb7e7 (libosmocore) Change-Id: I73c7cb6a86624695bd9c0f59abb72e2fdc655131
2018-09-13 01:23:07 +00:00
gsup_rx("06010809710000004026f0", NULL);
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
btw("LU was successful, and the conn has already been closed");
VERBOSE_ASSERT(lu_result_sent, == RES_ACCEPT, "%d");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
BTW("after a while, a new conn sends a CM Service Request. VLR responds with Auth Req, 2nd auth vector");
cm_service_result_sent = RES_NONE;
auth_request_sent = false;
auth_request_expect_rand = "12aca96fb4ffdea5c985cbafa9b6e18b";
ms_sends_msg("05247803305886089910070000006402");
OSMO_ASSERT(g_conn);
OSMO_ASSERT(g_conn->fi);
OSMO_ASSERT(g_conn->vsub);
VERBOSE_ASSERT(auth_request_sent, == true, "%d");
VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
btw("needs auth, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("MS sends Authen Response, VLR accepts and requests Ciphering. We already know Classmark 3,"
" so no need to request Classmark Update.");
expect_cipher_mode_cmd("07fa7502e07e1c00");
ms_sends_msg("0554" "20bde240" /* 2nd vector's sres, s.a. */);
VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
VERBOSE_ASSERT(cipher_mode_cmd_sent, == true, "%d");
btw("needs ciph, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("MS sends Ciphering Mode Complete, VLR accepts; above Ciphering is an implicit CM Service Accept");
ms_sends_msg("0632");
VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
/* Release connection */
expect_bssap_clear(OSMO_RAT_GERAN_A);
conn_conclude_cm_service_req(g_conn, OSMO_RAT_GERAN_A);
A5/n Ciph: request Classmark Update if missing When the VLR requests a Ciphering Mode with vlr_ops.set_ciph_mode(), and if we need a ciph algo flag from a Classmark information that is not yet known (usually CM 2 during LU), send a BSSMAP Classmark Request to get it. To manage the intermission of the Classmark Request, add - msc_classmark_request_then_cipher_mode_cmd(), - state SUBSCR_CONN_S_WAIT_CLASSMARK_UPDATE, - event SUBSCR_CONN_E_CLASSMARK_UPDATE. From state AUTH_CIPH, switch to state WAIT_CLASSMARK_UPDATE. Once the BSSMAP Classmark Response, is received, switch back to SUBSCR_CONN_S_AUTH_CIPH and re-initiate Ciphering Mode. To be able to re-enter the Ciphering Mode algo decision, factor it out into msc_geran_set_cipher_mode(). Rationale: In the following commit, essentially we stopped supporting A5/3 ciphering: commit 71330720b6efdda2fcfd3e9c0cb45f89e32e5670 "MSC: Intersect configured A5 algorithms with MS-supported ones" Change-Id: Id124923ee52a357cb7d3e04d33f585214774f3a3 A5/3 was no longer supported because from that commit on, we strictly checked the MS-supported ciphers, but we did not have Classmark 2 available during Location Updating. This patch changes that: when Classmark 2 is missing, actively request it by a BSSMAP Classmark Request; continue Ciphering only after the Response. Always request missing Classmark, even if a lesser cipher were configured available. If the Classmark Update response fails to come in, cause an attach failure. Instead, we could attempt to use a lesser cipher that is also enabled. That is left as a future feature, should that become relevant. I think it's unlikely. Technically, we could now end up requesting a Classmark Updating both during LU (vlr_lu_fsm) and CM Service/Paging Response (proc_arq_fsm), but in practice the only time we lack a Classmark is: during Location Updating with A5/3 enabled. A5/1 support is indicated in CM1 which is always available, and A5/3 support is indicated in CM2, which is always available during CM Service Request as well as Paging Response. So this patch has practical relevance only for Location Updating. For networks that permit only A5/3, this patch fixes Location Updating. For networks that support A5/3 and A5/1, so far we always used A5/1 during LU, and after this patch we request CM2 and likely use A5/3 instead. In msc_vlr_test_gsm_ciph, verify that requesting Classmark 2 for A5/3 works during LU. Also verify that the lack of a Classmark Response results in attach failure. In msc_vlr_test_gsm_ciph, a hacky unit test fakes a situation where a CM2 is missing during proc_arq_fsm and proves that that code path works, even though the practical relevance is currently zero. It would only become interesting if ciphering algorithms A5/4 and higher became relevant, because support of those would be indicated in Classmark 3, which would always require a Classmark Request. Related: OS#3043 Depends: I4a2e1d3923e33912579c4180aa1ff8e8f5abb7e7 (libosmocore) Change-Id: I73c7cb6a86624695bd9c0f59abb72e2fdc655131
2018-09-13 01:23:07 +00:00
btw("all requests serviced, conn has been released");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
BTW("an SMS is sent, MS is paged");
paging_expect_imsi(imsi);
paging_sent = false;
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 0, "%d");
send_sms(vsub, vsub,
"Privacy in residential applications is a desirable"
" marketing option.");
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 1, "%d");
vlr_subscr_put(vsub);
vsub = NULL;
VERBOSE_ASSERT(paging_sent, == true, "%d");
VERBOSE_ASSERT(paging_stopped, == false, "%d");
btw("the subscriber and its pending request should remain");
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 1, "%d");
vlr_subscr_put(vsub);
btw("MS replies with Paging Response, and VLR sends Auth Request with third key");
auth_request_sent = false;
auth_request_expect_rand = "e7c03ba7cf0e2fde82b2dc4d63077d42";
ms_sends_msg("06270703305882089910070000006402");
VERBOSE_ASSERT(auth_request_sent, == true, "%d");
btw("needs auth, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("MS sends Authen Response, VLR accepts and requests Ciphering");
expect_cipher_mode_cmd("e2b234f807886400");
ms_sends_msg("0554" "a29514ae" /* 3rd vector's sres, s.a. */);
VERBOSE_ASSERT(cipher_mode_cmd_sent, == true, "%d");
btw("needs ciph, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("MS sends Ciphering Mode Complete, VLR accepts and sends pending SMS");
dtap_expect_tx("09" /* SMS messages */
"01" /* CP-DATA */
"58" /* length */
"01" /* Network to MS */
"00" /* reference */
/* originator (gsm411_send_sms() hardcodes this weird nr) */
"0791" "447758100650" /* 447785016005 */
"00" /* dest */
/* SMS TPDU */
"4c" /* len */
"00" /* SMS deliver */
"05802443f2" /* originating address 42342 */
"00" /* TP-PID */
"00" /* GSM default alphabet */
"071010" /* Y-M-D (from wrapped gsm340_gen_scts())*/
"000000" /* H-M-S */
"00" /* GMT+0 */
"44" /* data length */
"5079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0e"
"d3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb"
"0c7ac3e9e9b7db05");
ms_sends_msg("0632");
VERBOSE_ASSERT(dtap_tx_confirmed, == true, "%d");
VERBOSE_ASSERT(paging_stopped, == true, "%d");
btw("SMS was delivered, no requests pending for subscr");
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 0, "%d");
vlr_subscr_put(vsub);
btw("conn is still open to wait for SMS ack dance");
EXPECT_CONN_COUNT(1);
btw("MS replies with CP-ACK for received SMS");
ms_sends_msg("8904");
EXPECT_CONN_COUNT(1);
btw("MS also sends RP-ACK, MSC in turn sends CP-ACK for that");
dtap_expect_tx("0904");
expect_bssap_clear();
ms_sends_msg("890106020041020000");
VERBOSE_ASSERT(dtap_tx_confirmed, == true, "%d");
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
btw("SMS is done, conn is gone");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
BTW("subscriber detaches");
expect_bssap_clear();
ms_sends_msg("050130089910070000006402");
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
clear_vlr();
comment_end();
}
/* During CM Service Request or Paging Response we already have Classmark 2 that indicates A5/3
* availablity. Here, in a hacky way remove the knowledge of Classmark 2 to tickle a code path where
* proc_arq_fsm needs a Classmark Update during Ciphering. Shouldn't happen in reality though. */
static void test_cm_service_needs_classmark_update()
{
struct vlr_subscr *vsub;
const char *imsi = "901700000004620";
comment_start();
/* A5/3 support is indicated in Classmark 3. By configuring A5/3, trigger the code paths that
* send a Classmark Request. */
net->a5_encryption_mask = (1 << 3); /* A5/3 */
/* implicit: net->authentication_required = true; */
btw("Location Update request causes a GSUP Send Auth Info request to HLR");
lu_result_sent = RES_NONE;
gsup_expect_tx("08010809710000004026f0");
ms_sends_msg("050802008168000130089910070000006402");
OSMO_ASSERT(gsup_tx_confirmed);
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("from HLR, rx _SEND_AUTH_INFO_RESULT; VLR sends Auth Req to MS");
/* Based on a Ki of 000102030405060708090a0b0c0d0e0f */
auth_request_sent = false;
auth_request_expect_rand = "585df1ae287f6e273dce07090d61320b";
auth_request_expect_autn = NULL;
gsup_rx("0a"
/* imsi */
"0108" "09710000004026f0"
/* 5 auth vectors... */
/* TL TL rand */
"0322" "2010" "585df1ae287f6e273dce07090d61320b"
/* TL sres TL kc */
"2104" "2d8b2c3e" "2208" "61855fb81fc2a800"
"0322" "2010" "12aca96fb4ffdea5c985cbafa9b6e18b"
"2104" "20bde240" "2208" "07fa7502e07e1c00"
"0322" "2010" "e7c03ba7cf0e2fde82b2dc4d63077d42"
"2104" "a29514ae" "2208" "e2b234f807886400"
"0322" "2010" "fa8f20b781b5881329d4fea26b1a3c51"
"2104" "5afc8d72" "2208" "2392f14f709ae000"
"0322" "2010" "0fd4cc8dbe8715d1f439e304edfd68dc"
"2104" "bc8d1c5b" "2208" "da7cdd6bfe2d7000",
NULL);
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
VERBOSE_ASSERT(auth_request_sent, == true, "%d");
BTW("MS sends Authen Response, VLR accepts and wants to send Ciphering Mode Command to MS"
" -- but needs Classmark 2 to determine whether A5/3 is supported");
cipher_mode_cmd_sent = false;
ms_sends_msg("05542d8b2c3e");
OSMO_ASSERT(!cipher_mode_cmd_sent);
A5/n Ciph: request Classmark Update if missing When the VLR requests a Ciphering Mode with vlr_ops.set_ciph_mode(), and if we need a ciph algo flag from a Classmark information that is not yet known (usually CM 2 during LU), send a BSSMAP Classmark Request to get it. To manage the intermission of the Classmark Request, add - msc_classmark_request_then_cipher_mode_cmd(), - state SUBSCR_CONN_S_WAIT_CLASSMARK_UPDATE, - event SUBSCR_CONN_E_CLASSMARK_UPDATE. From state AUTH_CIPH, switch to state WAIT_CLASSMARK_UPDATE. Once the BSSMAP Classmark Response, is received, switch back to SUBSCR_CONN_S_AUTH_CIPH and re-initiate Ciphering Mode. To be able to re-enter the Ciphering Mode algo decision, factor it out into msc_geran_set_cipher_mode(). Rationale: In the following commit, essentially we stopped supporting A5/3 ciphering: commit 71330720b6efdda2fcfd3e9c0cb45f89e32e5670 "MSC: Intersect configured A5 algorithms with MS-supported ones" Change-Id: Id124923ee52a357cb7d3e04d33f585214774f3a3 A5/3 was no longer supported because from that commit on, we strictly checked the MS-supported ciphers, but we did not have Classmark 2 available during Location Updating. This patch changes that: when Classmark 2 is missing, actively request it by a BSSMAP Classmark Request; continue Ciphering only after the Response. Always request missing Classmark, even if a lesser cipher were configured available. If the Classmark Update response fails to come in, cause an attach failure. Instead, we could attempt to use a lesser cipher that is also enabled. That is left as a future feature, should that become relevant. I think it's unlikely. Technically, we could now end up requesting a Classmark Updating both during LU (vlr_lu_fsm) and CM Service/Paging Response (proc_arq_fsm), but in practice the only time we lack a Classmark is: during Location Updating with A5/3 enabled. A5/1 support is indicated in CM1 which is always available, and A5/3 support is indicated in CM2, which is always available during CM Service Request as well as Paging Response. So this patch has practical relevance only for Location Updating. For networks that permit only A5/3, this patch fixes Location Updating. For networks that support A5/3 and A5/1, so far we always used A5/1 during LU, and after this patch we request CM2 and likely use A5/3 instead. In msc_vlr_test_gsm_ciph, verify that requesting Classmark 2 for A5/3 works during LU. Also verify that the lack of a Classmark Response results in attach failure. In msc_vlr_test_gsm_ciph, a hacky unit test fakes a situation where a CM2 is missing during proc_arq_fsm and proves that that code path works, even though the practical relevance is currently zero. It would only become interesting if ciphering algorithms A5/4 and higher became relevant, because support of those would be indicated in Classmark 3, which would always require a Classmark Request. Related: OS#3043 Depends: I4a2e1d3923e33912579c4180aa1ff8e8f5abb7e7 (libosmocore) Change-Id: I73c7cb6a86624695bd9c0f59abb72e2fdc655131
2018-09-13 01:23:07 +00:00
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("BSC sends back a BSSMAP Classmark Update, that triggers the Ciphering Mode Command in A5/3");
expect_cipher_mode_cmd("61855fb81fc2a800");
bss_sends_bssap_mgmt("541203505886130b6014042f6503b8800d2100");
OSMO_ASSERT(cipher_mode_cmd_sent);
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("MS sends Ciphering Mode Complete, VLR accepts and sends GSUP LU Req to HLR");
gsup_expect_tx("04010809710000004026f0280102");
A5/n Ciph: request Classmark Update if missing When the VLR requests a Ciphering Mode with vlr_ops.set_ciph_mode(), and if we need a ciph algo flag from a Classmark information that is not yet known (usually CM 2 during LU), send a BSSMAP Classmark Request to get it. To manage the intermission of the Classmark Request, add - msc_classmark_request_then_cipher_mode_cmd(), - state SUBSCR_CONN_S_WAIT_CLASSMARK_UPDATE, - event SUBSCR_CONN_E_CLASSMARK_UPDATE. From state AUTH_CIPH, switch to state WAIT_CLASSMARK_UPDATE. Once the BSSMAP Classmark Response, is received, switch back to SUBSCR_CONN_S_AUTH_CIPH and re-initiate Ciphering Mode. To be able to re-enter the Ciphering Mode algo decision, factor it out into msc_geran_set_cipher_mode(). Rationale: In the following commit, essentially we stopped supporting A5/3 ciphering: commit 71330720b6efdda2fcfd3e9c0cb45f89e32e5670 "MSC: Intersect configured A5 algorithms with MS-supported ones" Change-Id: Id124923ee52a357cb7d3e04d33f585214774f3a3 A5/3 was no longer supported because from that commit on, we strictly checked the MS-supported ciphers, but we did not have Classmark 2 available during Location Updating. This patch changes that: when Classmark 2 is missing, actively request it by a BSSMAP Classmark Request; continue Ciphering only after the Response. Always request missing Classmark, even if a lesser cipher were configured available. If the Classmark Update response fails to come in, cause an attach failure. Instead, we could attempt to use a lesser cipher that is also enabled. That is left as a future feature, should that become relevant. I think it's unlikely. Technically, we could now end up requesting a Classmark Updating both during LU (vlr_lu_fsm) and CM Service/Paging Response (proc_arq_fsm), but in practice the only time we lack a Classmark is: during Location Updating with A5/3 enabled. A5/1 support is indicated in CM1 which is always available, and A5/3 support is indicated in CM2, which is always available during CM Service Request as well as Paging Response. So this patch has practical relevance only for Location Updating. For networks that permit only A5/3, this patch fixes Location Updating. For networks that support A5/3 and A5/1, so far we always used A5/1 during LU, and after this patch we request CM2 and likely use A5/3 instead. In msc_vlr_test_gsm_ciph, verify that requesting Classmark 2 for A5/3 works during LU. Also verify that the lack of a Classmark Response results in attach failure. In msc_vlr_test_gsm_ciph, a hacky unit test fakes a situation where a CM2 is missing during proc_arq_fsm and proves that that code path works, even though the practical relevance is currently zero. It would only become interesting if ciphering algorithms A5/4 and higher became relevant, because support of those would be indicated in Classmark 3, which would always require a Classmark Request. Related: OS#3043 Depends: I4a2e1d3923e33912579c4180aa1ff8e8f5abb7e7 (libosmocore) Change-Id: I73c7cb6a86624695bd9c0f59abb72e2fdc655131
2018-09-13 01:23:07 +00:00
ms_sends_msg("0632");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("HLR sends _INSERT_DATA_REQUEST, VLR responds with _INSERT_DATA_RESULT");
gsup_rx("10010809710000004026f00804032443f2",
"12010809710000004026f0");
VERBOSE_ASSERT(lu_result_sent, == RES_NONE, "%d");
btw("HLR also sends GSUP _UPDATE_LOCATION_RESULT");
expect_bssap_clear();
gsup_rx("06010809710000004026f0", NULL);
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
btw("LU was successful, and the conn has already been closed");
VERBOSE_ASSERT(lu_result_sent, == RES_ACCEPT, "%d");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
BTW("after a while, a new conn sends a CM Service Request. VLR responds with Auth Req, 2nd auth vector");
cm_service_result_sent = RES_NONE;
auth_request_sent = false;
auth_request_expect_rand = "12aca96fb4ffdea5c985cbafa9b6e18b";
ms_sends_msg("05247803305886089910070000006402");
OSMO_ASSERT(g_conn);
OSMO_ASSERT(g_conn->fi);
OSMO_ASSERT(g_conn->vsub);
VERBOSE_ASSERT(auth_request_sent, == true, "%d");
VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
btw("needs auth, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("MS sends Authen Response, VLR accepts and requests Ciphering. We already know Classmark 3,"
" so no need to request Classmark Update.");
expect_cipher_mode_cmd("07fa7502e07e1c00");
ms_sends_msg("0554" "20bde240" /* 2nd vector's sres, s.a. */);
VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
VERBOSE_ASSERT(cipher_mode_cmd_sent, == true, "%d");
btw("needs ciph, not yet accepted");
EXPECT_ACCEPTED(false);
thwart_rx_non_initial_requests();
btw("MS sends Ciphering Mode Complete, VLR accepts; above Ciphering is an implicit CM Service Accept");
ms_sends_msg("0632");
VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
/* Release connection */
expect_bssap_clear(OSMO_RAT_GERAN_A);
conn_conclude_cm_service_req(g_conn, OSMO_RAT_GERAN_A);
A5/n Ciph: request Classmark Update if missing When the VLR requests a Ciphering Mode with vlr_ops.set_ciph_mode(), and if we need a ciph algo flag from a Classmark information that is not yet known (usually CM 2 during LU), send a BSSMAP Classmark Request to get it. To manage the intermission of the Classmark Request, add - msc_classmark_request_then_cipher_mode_cmd(), - state SUBSCR_CONN_S_WAIT_CLASSMARK_UPDATE, - event SUBSCR_CONN_E_CLASSMARK_UPDATE. From state AUTH_CIPH, switch to state WAIT_CLASSMARK_UPDATE. Once the BSSMAP Classmark Response, is received, switch back to SUBSCR_CONN_S_AUTH_CIPH and re-initiate Ciphering Mode. To be able to re-enter the Ciphering Mode algo decision, factor it out into msc_geran_set_cipher_mode(). Rationale: In the following commit, essentially we stopped supporting A5/3 ciphering: commit 71330720b6efdda2fcfd3e9c0cb45f89e32e5670 "MSC: Intersect configured A5 algorithms with MS-supported ones" Change-Id: Id124923ee52a357cb7d3e04d33f585214774f3a3 A5/3 was no longer supported because from that commit on, we strictly checked the MS-supported ciphers, but we did not have Classmark 2 available during Location Updating. This patch changes that: when Classmark 2 is missing, actively request it by a BSSMAP Classmark Request; continue Ciphering only after the Response. Always request missing Classmark, even if a lesser cipher were configured available. If the Classmark Update response fails to come in, cause an attach failure. Instead, we could attempt to use a lesser cipher that is also enabled. That is left as a future feature, should that become relevant. I think it's unlikely. Technically, we could now end up requesting a Classmark Updating both during LU (vlr_lu_fsm) and CM Service/Paging Response (proc_arq_fsm), but in practice the only time we lack a Classmark is: during Location Updating with A5/3 enabled. A5/1 support is indicated in CM1 which is always available, and A5/3 support is indicated in CM2, which is always available during CM Service Request as well as Paging Response. So this patch has practical relevance only for Location Updating. For networks that permit only A5/3, this patch fixes Location Updating. For networks that support A5/3 and A5/1, so far we always used A5/1 during LU, and after this patch we request CM2 and likely use A5/3 instead. In msc_vlr_test_gsm_ciph, verify that requesting Classmark 2 for A5/3 works during LU. Also verify that the lack of a Classmark Response results in attach failure. In msc_vlr_test_gsm_ciph, a hacky unit test fakes a situation where a CM2 is missing during proc_arq_fsm and proves that that code path works, even though the practical relevance is currently zero. It would only become interesting if ciphering algorithms A5/4 and higher became relevant, because support of those would be indicated in Classmark 3, which would always require a Classmark Request. Related: OS#3043 Depends: I4a2e1d3923e33912579c4180aa1ff8e8f5abb7e7 (libosmocore) Change-Id: I73c7cb6a86624695bd9c0f59abb72e2fdc655131
2018-09-13 01:23:07 +00:00
btw("all requests serviced, conn has been released");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
BTW("an SMS is sent, MS is paged");
paging_expect_imsi(imsi);
paging_sent = false;
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 0, "%d");
send_sms(vsub, vsub, "Privacy in residential applications is a desirable marketing option.");
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 1, "%d");
vlr_subscr_put(vsub);
vsub = NULL;
VERBOSE_ASSERT(paging_sent, == true, "%d");
VERBOSE_ASSERT(paging_stopped, == false, "%d");
btw("the subscriber and its pending request should remain");
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 1, "%d");
vlr_subscr_put(vsub);
btw("MS replies with Paging Response, and VLR sends Auth Request with third key");
auth_request_sent = false;
auth_request_expect_rand = "e7c03ba7cf0e2fde82b2dc4d63077d42";
ms_sends_msg("06270703305882089910070000006402");
VERBOSE_ASSERT(auth_request_sent, == true, "%d");
BTW("Fake a situation where Classmark 2 is unknown during proc_arq_fsm");
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
vsub->classmark.classmark2_len = 0;
vsub->classmark.classmark3_len = 0;
vlr_subscr_put(vsub);
btw("MS sends Authen Response, VLR accepts and requests Ciphering");
btw("MS sends Authen Response, VLR accepts and requests Ciphering."
" Normally, we'd know Classmark 3, but this test removed it."
" Hence a Classmark Request is generated.");
cipher_mode_cmd_sent = false;
ms_sends_msg("0554" "a29514ae" /* 3rd vector's sres, s.a. */);
OSMO_ASSERT(!cipher_mode_cmd_sent);
btw("BSC sends back a BSSMAP Classmark Update, that triggers the Ciphering Mode Command in A5/3");
expect_cipher_mode_cmd("e2b234f807886400");
bss_sends_bssap_mgmt("541203505886130b6014042f6503b8800d2100");
OSMO_ASSERT(cipher_mode_cmd_sent);
btw("needs ciph, not yet accepted");
EXPECT_ACCEPTED(false);
btw("MS sends Ciphering Mode Complete, VLR accepts and sends pending SMS");
dtap_expect_tx("09" /* SMS messages */
"01" /* CP-DATA */
"58" /* length */
"01" /* Network to MS */
"00" /* reference */
/* originator (gsm411_send_sms() hardcodes this weird nr) */
"0791" "447758100650" /* 447785016005 */
"00" /* dest */
/* SMS TPDU */
"4c" /* len */
"00" /* SMS deliver */
"05802443f2" /* originating address 42342 */
"00" /* TP-PID */
"00" /* GSM default alphabet */
"071010" /* Y-M-D (from wrapped gsm340_gen_scts())*/
"000000" /* H-M-S */
"00" /* GMT+0 */
"44" /* data length */
"5079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0e"
"d3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb"
"0c7ac3e9e9b7db05");
ms_sends_msg("0632");
VERBOSE_ASSERT(dtap_tx_confirmed, == true, "%d");
VERBOSE_ASSERT(paging_stopped, == true, "%d");
btw("SMS was delivered, no requests pending for subscr");
vsub = vlr_subscr_find_by_imsi(net->vlr, imsi);
OSMO_ASSERT(vsub);
VERBOSE_ASSERT(llist_count(&vsub->cs.requests), == 0, "%d");
vlr_subscr_put(vsub);
btw("conn is still open to wait for SMS ack dance");
EXPECT_CONN_COUNT(1);
btw("MS replies with CP-ACK for received SMS");
ms_sends_msg("8904");
EXPECT_CONN_COUNT(1);
btw("MS also sends RP-ACK, MSC in turn sends CP-ACK for that");
dtap_expect_tx("0904");
expect_bssap_clear();
ms_sends_msg("890106020041020000");
VERBOSE_ASSERT(dtap_tx_confirmed, == true, "%d");
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
btw("SMS is done, conn is gone");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
BTW("subscriber detaches");
expect_bssap_clear();
ms_sends_msg("050130089910070000006402");
VERBOSE_ASSERT(bssap_clear_sent, == true, "%d");
bss_sends_clear_complete();
EXPECT_CONN_COUNT(0);
clear_vlr();
comment_end();
}
msc_vlr_test_func_t msc_vlr_tests[] = {
test_ciph,
test_ciph_tmsi,
test_ciph_imei,
test_ciph_imeisv,
test_ciph_tmsi_imei,
test_gsm_ciph_in_umts_env,
A5/n Ciph: request Classmark Update if missing When the VLR requests a Ciphering Mode with vlr_ops.set_ciph_mode(), and if we need a ciph algo flag from a Classmark information that is not yet known (usually CM 2 during LU), send a BSSMAP Classmark Request to get it. To manage the intermission of the Classmark Request, add - msc_classmark_request_then_cipher_mode_cmd(), - state SUBSCR_CONN_S_WAIT_CLASSMARK_UPDATE, - event SUBSCR_CONN_E_CLASSMARK_UPDATE. From state AUTH_CIPH, switch to state WAIT_CLASSMARK_UPDATE. Once the BSSMAP Classmark Response, is received, switch back to SUBSCR_CONN_S_AUTH_CIPH and re-initiate Ciphering Mode. To be able to re-enter the Ciphering Mode algo decision, factor it out into msc_geran_set_cipher_mode(). Rationale: In the following commit, essentially we stopped supporting A5/3 ciphering: commit 71330720b6efdda2fcfd3e9c0cb45f89e32e5670 "MSC: Intersect configured A5 algorithms with MS-supported ones" Change-Id: Id124923ee52a357cb7d3e04d33f585214774f3a3 A5/3 was no longer supported because from that commit on, we strictly checked the MS-supported ciphers, but we did not have Classmark 2 available during Location Updating. This patch changes that: when Classmark 2 is missing, actively request it by a BSSMAP Classmark Request; continue Ciphering only after the Response. Always request missing Classmark, even if a lesser cipher were configured available. If the Classmark Update response fails to come in, cause an attach failure. Instead, we could attempt to use a lesser cipher that is also enabled. That is left as a future feature, should that become relevant. I think it's unlikely. Technically, we could now end up requesting a Classmark Updating both during LU (vlr_lu_fsm) and CM Service/Paging Response (proc_arq_fsm), but in practice the only time we lack a Classmark is: during Location Updating with A5/3 enabled. A5/1 support is indicated in CM1 which is always available, and A5/3 support is indicated in CM2, which is always available during CM Service Request as well as Paging Response. So this patch has practical relevance only for Location Updating. For networks that permit only A5/3, this patch fixes Location Updating. For networks that support A5/3 and A5/1, so far we always used A5/1 during LU, and after this patch we request CM2 and likely use A5/3 instead. In msc_vlr_test_gsm_ciph, verify that requesting Classmark 2 for A5/3 works during LU. Also verify that the lack of a Classmark Response results in attach failure. In msc_vlr_test_gsm_ciph, a hacky unit test fakes a situation where a CM2 is missing during proc_arq_fsm and proves that that code path works, even though the practical relevance is currently zero. It would only become interesting if ciphering algorithms A5/4 and higher became relevant, because support of those would be indicated in Classmark 3, which would always require a Classmark Request. Related: OS#3043 Depends: I4a2e1d3923e33912579c4180aa1ff8e8f5abb7e7 (libosmocore) Change-Id: I73c7cb6a86624695bd9c0f59abb72e2fdc655131
2018-09-13 01:23:07 +00:00
test_a5_3_supported,
test_cm_service_needs_classmark_update,
NULL
};