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hlr_auc_gw: Add support for updating Milenage file SQN

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If the new command line argument -u is used, hlr_auc_gw will update
the Milenage file SQN numbers when exiting based on what was the last
SQN used during the process runtime.

Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2012-05-03 22:39:49 +03:00
parent 057a92ec5c
commit 5336861301
1 changed files with 90 additions and 5 deletions
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95
hostapd/hlr_auc_gw.c
View file

@ -1,6 +1,6 @@
/*
* HLR/AuC testing gateway for hostapd EAP-SIM/AKA database/authenticator
* Copyright (c) 2005-2007, Jouni Malinen <j@w1.fi>
* Copyright (c) 2005-2007, 2012, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
@ -47,6 +47,9 @@
static const char *default_socket_path = "/tmp/hlr_auc_gw.sock";
static const char *socket_path;
static int serv_sock = -1;
static char *milenage_file = NULL;
static int update_milenage = 0;
static int sqn_changes = 0;
/* GSM triplets */
struct gsm_triplet {
@ -368,6 +371,80 @@ static int read_milenage(const char *fname)
}
static void update_milenage_file(const char *fname)
{
FILE *f, *f2;
char buf[500], *pos;
char *end = buf + sizeof(buf);
struct milenage_parameters *m;
size_t imsi_len;
f = fopen(fname, "r");
if (f == NULL) {
printf("Could not open Milenage data file '%s'\n", fname);
return;
}
snprintf(buf, sizeof(buf), "%s.new", fname);
f2 = fopen(buf, "w");
if (f2 == NULL) {
printf("Could not write Milenage data file '%s'\n", buf);
fclose(f);
return;
}
while (fgets(buf, sizeof(buf), f)) {
/* IMSI Ki OPc AMF SQN */
buf[sizeof(buf) - 1] = '\0';
pos = strchr(buf, ' ');
if (buf[0] == '#' || pos == NULL || pos - buf >= 20)
goto no_update;
imsi_len = pos - buf;
for (m = milenage_db; m; m = m->next) {
if (strncmp(buf, m->imsi, imsi_len) == 0 &&
m->imsi[imsi_len] == '\0')
break;
}
if (!m)
goto no_update;
pos = buf;
pos += snprintf(pos, end - pos, "%s ", m->imsi);
pos += wpa_snprintf_hex(pos, end - pos, m->ki, 16);
*pos++ = ' ';
pos += wpa_snprintf_hex(pos, end - pos, m->opc, 16);
*pos++ = ' ';
pos += wpa_snprintf_hex(pos, end - pos, m->amf, 2);
*pos++ = ' ';
pos += wpa_snprintf_hex(pos, end - pos, m->sqn, 6);
*pos++ = '\n';
no_update:
fprintf(f2, "%s", buf);
}
fclose(f2);
fclose(f);
snprintf(buf, sizeof(buf), "%s.bak", fname);
if (rename(fname, buf) < 0) {
perror("rename");
return;
}
snprintf(buf, sizeof(buf), "%s.new", fname);
if (rename(buf, fname) < 0) {
perror("rename");
return;
}
}
static struct milenage_parameters * get_milenage(const char *imsi)
{
struct milenage_parameters *m = milenage_db;
@ -480,6 +557,7 @@ static void aka_req_auth(int s, struct sockaddr_un *from, socklen_t fromlen,
return;
res_len = EAP_AKA_RES_MAX_LEN;
inc_byte_array(m->sqn, 6);
sqn_changes = 1;
printf("AKA: Milenage with SQN=%02x%02x%02x%02x%02x%02x\n",
m->sqn[0], m->sqn[1], m->sqn[2],
m->sqn[3], m->sqn[4], m->sqn[5]);
@ -563,6 +641,7 @@ static void aka_auts(int s, struct sockaddr_un *from, socklen_t fromlen,
printf("AKA-AUTS: Re-synchronized: "
"SQN=%02x%02x%02x%02x%02x%02x\n",
sqn[0], sqn[1], sqn[2], sqn[3], sqn[4], sqn[5]);
sqn_changes = 1;
}
}
@ -609,6 +688,9 @@ static void cleanup(void)
struct gsm_triplet *g, *gprev;
struct milenage_parameters *m, *prev;
if (update_milenage && milenage_file && sqn_changes)
update_milenage_file(milenage_file);
g = gsm_db;
while (g) {
gprev = g;
@ -639,14 +721,15 @@ static void usage(void)
{
printf("HLR/AuC testing gateway for hostapd EAP-SIM/AKA "
"database/authenticator\n"
"Copyright (c) 2005-2007, Jouni Malinen <j@w1.fi>\n"
"Copyright (c) 2005-2007, 2012, Jouni Malinen <j@w1.fi>\n"
"\n"
"usage:\n"
"hlr_auc_gw [-h] [-s<socket path>] [-g<triplet file>] "
"hlr_auc_gw [-hu] [-s<socket path>] [-g<triplet file>] "
"[-m<milenage file>]\n"
"\n"
"options:\n"
" -h = show this usage help\n"
" -u = update SQN in Milenage file on exit\n"
" -s<socket path> = path for UNIX domain socket\n"
" (default: %s)\n"
" -g<triplet file> = path for GSM authentication triplets\n"
@ -658,7 +741,6 @@ static void usage(void)
int main(int argc, char *argv[])
{
int c;
char *milenage_file = NULL;
char *gsm_triplet_file = NULL;
if (os_program_init())
@ -667,7 +749,7 @@ int main(int argc, char *argv[])
socket_path = default_socket_path;
for (;;) {
c = getopt(argc, argv, "g:hm:s:");
c = getopt(argc, argv, "g:hm:s:u");
if (c < 0)
break;
switch (c) {
@ -683,6 +765,9 @@ int main(int argc, char *argv[])
case 's':
socket_path = optarg;
break;
case 'u':
update_milenage = 1;
break;
default:
usage();
return -1;