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hostapd/wpa_supplicant/interworking.c
Jouni Malinen 11e4f46a10 Interworking: Add support for certificate credentials (EAP-TLS) 
This allows Interworking network selection to be used with EAP-TLS
(client certificate/private key based credential).

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-03-03 10:38:10 +02:00

1384 lines
32 KiB
C
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/*
* Interworking (IEEE 802.11u)
* Copyright (c) 2011-2012, Qualcomm Atheros, Inc.
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include "common.h"
#include "common/ieee802_11_defs.h"
#include "common/gas.h"
#include "common/wpa_ctrl.h"
#include "drivers/driver.h"
#include "eap_common/eap_defs.h"
#include "eap_peer/eap_methods.h"
#include "wpa_supplicant_i.h"
#include "config.h"
#include "config_ssid.h"
#include "bss.h"
#include "scan.h"
#include "notify.h"
#include "gas_query.h"
#include "interworking.h"
#if defined(EAP_SIM) | defined(EAP_SIM_DYNAMIC)
#define INTERWORKING_3GPP
#else
#if defined(EAP_AKA) | defined(EAP_AKA_DYNAMIC)
#define INTERWORKING_3GPP
#else
#if defined(EAP_AKA_PRIME) | defined(EAP_AKA_PRIME_DYNAMIC)
#define INTERWORKING_3GPP
#endif
#endif
#endif
static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s);
static struct wpabuf * anqp_build_req(u16 info_ids[], size_t num_ids,
struct wpabuf *extra)
{
struct wpabuf *buf;
size_t i;
u8 *len_pos;
buf = gas_anqp_build_initial_req(0, 4 + num_ids * 2 +
(extra ? wpabuf_len(extra) : 0));
if (buf == NULL)
return NULL;
len_pos = gas_anqp_add_element(buf, ANQP_QUERY_LIST);
for (i = 0; i < num_ids; i++)
wpabuf_put_le16(buf, info_ids[i]);
gas_anqp_set_element_len(buf, len_pos);
if (extra)
wpabuf_put_buf(buf, extra);
gas_anqp_set_len(buf);
return buf;
}
static void interworking_anqp_resp_cb(void *ctx, const u8 *dst,
u8 dialog_token,
enum gas_query_result result,
const struct wpabuf *adv_proto,
const struct wpabuf *resp,
u16 status_code)
{
struct wpa_supplicant *wpa_s = ctx;
anqp_resp_cb(wpa_s, dst, dialog_token, result, adv_proto, resp,
status_code);
interworking_next_anqp_fetch(wpa_s);
}
static int interworking_anqp_send_req(struct wpa_supplicant *wpa_s,
struct wpa_bss *bss)
{
struct wpabuf *buf;
int ret = 0;
int res;
u16 info_ids[] = {
ANQP_CAPABILITY_LIST,
ANQP_VENUE_NAME,
ANQP_NETWORK_AUTH_TYPE,
ANQP_ROAMING_CONSORTIUM,
ANQP_IP_ADDR_TYPE_AVAILABILITY,
ANQP_NAI_REALM,
ANQP_3GPP_CELLULAR_NETWORK,
ANQP_DOMAIN_NAME
};
struct wpabuf *extra = NULL;
wpa_printf(MSG_DEBUG, "Interworking: ANQP Query Request to " MACSTR,
MAC2STR(bss->bssid));
buf = anqp_build_req(info_ids, sizeof(info_ids) / sizeof(info_ids[0]),
extra);
wpabuf_free(extra);
if (buf == NULL)
return -1;
res = gas_query_req(wpa_s->gas, bss->bssid, bss->freq, buf,
interworking_anqp_resp_cb, wpa_s);
if (res < 0) {
wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
ret = -1;
} else
wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
"%u", res);
wpabuf_free(buf);
return ret;
}
struct nai_realm_eap {
u8 method;
u8 inner_method;
enum nai_realm_eap_auth_inner_non_eap inner_non_eap;
u8 cred_type;
u8 tunneled_cred_type;
};
struct nai_realm {
u8 encoding;
char *realm;
u8 eap_count;
struct nai_realm_eap *eap;
};
static void nai_realm_free(struct nai_realm *realms, u16 count)
{
u16 i;
if (realms == NULL)
return;
for (i = 0; i < count; i++) {
os_free(realms[i].eap);
os_free(realms[i].realm);
}
os_free(realms);
}
static const u8 * nai_realm_parse_eap(struct nai_realm_eap *e, const u8 *pos,
const u8 *end)
{
u8 elen, auth_count, a;
const u8 *e_end;
if (pos + 3 > end) {
wpa_printf(MSG_DEBUG, "No room for EAP Method fixed fields");
return NULL;
}
elen = *pos++;
if (pos + elen > end || elen < 2) {
wpa_printf(MSG_DEBUG, "No room for EAP Method subfield");
return NULL;
}
e_end = pos + elen;
e->method = *pos++;
auth_count = *pos++;
wpa_printf(MSG_DEBUG, "EAP Method: len=%u method=%u auth_count=%u",
elen, e->method, auth_count);
for (a = 0; a < auth_count; a++) {
u8 id, len;
if (pos + 2 > end || pos + 2 + pos[1] > end) {
wpa_printf(MSG_DEBUG, "No room for Authentication "
"Parameter subfield");
return NULL;
}
id = *pos++;
len = *pos++;
switch (id) {
case NAI_REALM_EAP_AUTH_NON_EAP_INNER_AUTH:
if (len < 1)
break;
e->inner_non_eap = *pos;
if (e->method != EAP_TYPE_TTLS)
break;
switch (*pos) {
case NAI_REALM_INNER_NON_EAP_PAP:
wpa_printf(MSG_DEBUG, "EAP-TTLS/PAP");
break;
case NAI_REALM_INNER_NON_EAP_CHAP:
wpa_printf(MSG_DEBUG, "EAP-TTLS/CHAP");
break;
case NAI_REALM_INNER_NON_EAP_MSCHAP:
wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAP");
break;
case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
wpa_printf(MSG_DEBUG, "EAP-TTLS/MSCHAPV2");
break;
}
break;
case NAI_REALM_EAP_AUTH_INNER_AUTH_EAP_METHOD:
if (len < 1)
break;
e->inner_method = *pos;
wpa_printf(MSG_DEBUG, "Inner EAP method: %u",
e->inner_method);
break;
case NAI_REALM_EAP_AUTH_CRED_TYPE:
if (len < 1)
break;
e->cred_type = *pos;
wpa_printf(MSG_DEBUG, "Credential Type: %u",
e->cred_type);
break;
case NAI_REALM_EAP_AUTH_TUNNELED_CRED_TYPE:
if (len < 1)
break;
e->tunneled_cred_type = *pos;
wpa_printf(MSG_DEBUG, "Tunneled EAP Method Credential "
"Type: %u", e->tunneled_cred_type);
break;
default:
wpa_printf(MSG_DEBUG, "Unsupported Authentication "
"Parameter: id=%u len=%u", id, len);
wpa_hexdump(MSG_DEBUG, "Authentication Parameter "
"Value", pos, len);
break;
}
pos += len;
}
return e_end;
}
static const u8 * nai_realm_parse_realm(struct nai_realm *r, const u8 *pos,
const u8 *end)
{
u16 len;
const u8 *f_end;
u8 realm_len, e;
if (end - pos < 4) {
wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
"fixed fields");
return NULL;
}
len = WPA_GET_LE16(pos); /* NAI Realm Data field Length */
pos += 2;
if (pos + len > end || len < 3) {
wpa_printf(MSG_DEBUG, "No room for NAI Realm Data "
"(len=%u; left=%u)",
len, (unsigned int) (end - pos));
return NULL;
}
f_end = pos + len;
r->encoding = *pos++;
realm_len = *pos++;
if (pos + realm_len > f_end) {
wpa_printf(MSG_DEBUG, "No room for NAI Realm "
"(len=%u; left=%u)",
realm_len, (unsigned int) (f_end - pos));
return NULL;
}
wpa_hexdump_ascii(MSG_DEBUG, "NAI Realm", pos, realm_len);
r->realm = os_malloc(realm_len + 1);
if (r->realm == NULL)
return NULL;
os_memcpy(r->realm, pos, realm_len);
r->realm[realm_len] = '\0';
pos += realm_len;
if (pos + 1 > f_end) {
wpa_printf(MSG_DEBUG, "No room for EAP Method Count");
return NULL;
}
r->eap_count = *pos++;
wpa_printf(MSG_DEBUG, "EAP Count: %u", r->eap_count);
if (pos + r->eap_count * 3 > f_end) {
wpa_printf(MSG_DEBUG, "No room for EAP Methods");
return NULL;
}
r->eap = os_zalloc(r->eap_count * sizeof(struct nai_realm_eap));
if (r->eap == NULL)
return NULL;
for (e = 0; e < r->eap_count; e++) {
pos = nai_realm_parse_eap(&r->eap[e], pos, f_end);
if (pos == NULL)
return NULL;
}
return f_end;
}
static struct nai_realm * nai_realm_parse(struct wpabuf *anqp, u16 *count)
{
struct nai_realm *realm;
const u8 *pos, *end;
u16 i, num;
if (anqp == NULL || wpabuf_len(anqp) < 2)
return NULL;
pos = wpabuf_head_u8(anqp);
end = pos + wpabuf_len(anqp);
num = WPA_GET_LE16(pos);
wpa_printf(MSG_DEBUG, "NAI Realm Count: %u", num);
pos += 2;
if (num * 5 > end - pos) {
wpa_printf(MSG_DEBUG, "Invalid NAI Realm Count %u - not "
"enough data (%u octets) for that many realms",
num, (unsigned int) (end - pos));
return NULL;
}
realm = os_zalloc(num * sizeof(struct nai_realm));
if (realm == NULL)
return NULL;
for (i = 0; i < num; i++) {
pos = nai_realm_parse_realm(&realm[i], pos, end);
if (pos == NULL) {
nai_realm_free(realm, num);
return NULL;
}
}
*count = num;
return realm;
}
static int nai_realm_match(struct nai_realm *realm, const char *home_realm)
{
char *tmp, *pos, *end;
int match = 0;
if (realm->realm == NULL || home_realm == NULL)
return 0;
if (os_strchr(realm->realm, ';') == NULL)
return os_strcasecmp(realm->realm, home_realm) == 0;
tmp = os_strdup(realm->realm);
if (tmp == NULL)
return 0;
pos = tmp;
while (*pos) {
end = os_strchr(pos, ';');
if (end)
*end = '\0';
if (os_strcasecmp(pos, home_realm) == 0) {
match = 1;
break;
}
if (end == NULL)
break;
pos = end + 1;
}
os_free(tmp);
return match;
}
static int nai_realm_cred_username(struct nai_realm_eap *eap)
{
if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
return 0; /* method not supported */
if (eap->method != EAP_TYPE_TTLS && eap->method != EAP_TYPE_PEAP) {
/* Only tunneled methods with username/password supported */
return 0;
}
if (eap->method == EAP_TYPE_PEAP &&
eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
return 0;
if (eap->method == EAP_TYPE_TTLS) {
if (eap->inner_method == 0 && eap->inner_non_eap == 0)
return 0;
if (eap->inner_method &&
eap_get_name(EAP_VENDOR_IETF, eap->inner_method) == NULL)
return 0;
if (eap->inner_non_eap &&
eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_PAP &&
eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_CHAP &&
eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAP &&
eap->inner_non_eap != NAI_REALM_INNER_NON_EAP_MSCHAPV2)
return 0;
}
if (eap->inner_method &&
eap->inner_method != EAP_TYPE_GTC &&
eap->inner_method != EAP_TYPE_MSCHAPV2)
return 0;
return 1;
}
static int nai_realm_cred_cert(struct nai_realm_eap *eap)
{
if (eap_get_name(EAP_VENDOR_IETF, eap->method) == NULL)
return 0; /* method not supported */
if (eap->method != EAP_TYPE_TLS) {
/* Only EAP-TLS supported for credential authentication */
return 0;
}
return 1;
}
static struct nai_realm_eap * nai_realm_find_eap(struct wpa_cred *cred,
struct nai_realm *realm)
{
u8 e;
if (cred == NULL ||
cred->username == NULL ||
cred->username[0] == '\0' ||
((cred->password == NULL ||
cred->password[0] == '\0') &&
(cred->private_key == NULL ||
cred->private_key[0] == '\0')))
return NULL;
for (e = 0; e < realm->eap_count; e++) {
struct nai_realm_eap *eap = &realm->eap[e];
if (cred->password && cred->password[0] &&
nai_realm_cred_username(eap))
return eap;
if (cred->private_key && cred->private_key[0] &&
nai_realm_cred_cert(eap))
return eap;
}
return NULL;
}
#ifdef INTERWORKING_3GPP
static int plmn_id_match(struct wpabuf *anqp, const char *imsi)
{
const char *sep;
u8 plmn[3];
const u8 *pos, *end;
u8 udhl;
sep = os_strchr(imsi, '-');
if (sep == NULL || (sep - imsi != 5 && sep - imsi != 6))
return 0;
/* See Annex A of 3GPP TS 24.234 v8.1.0 for description */
plmn[0] = (imsi[0] - '0') | ((imsi[1] - '0') << 4);
plmn[1] = imsi[2] - '0';
if (sep - imsi == 6)
plmn[1] |= (imsi[5] - '0') << 4;
else
plmn[1] |= 0xf0;
plmn[2] = (imsi[3] - '0') | ((imsi[4] - '0') << 4);
if (anqp == NULL)
return 0;
pos = wpabuf_head_u8(anqp);
end = pos + wpabuf_len(anqp);
if (pos + 2 > end)
return 0;
if (*pos != 0) {
wpa_printf(MSG_DEBUG, "Unsupported GUD version 0x%x", *pos);
return 0;
}
pos++;
udhl = *pos++;
if (pos + udhl > end) {
wpa_printf(MSG_DEBUG, "Invalid UDHL");
return 0;
}
end = pos + udhl;
while (pos + 2 <= end) {
u8 iei, len;
const u8 *l_end;
iei = *pos++;
len = *pos++ & 0x7f;
if (pos + len > end)
break;
l_end = pos + len;
if (iei == 0 && len > 0) {
/* PLMN List */
u8 num, i;
num = *pos++;
for (i = 0; i < num; i++) {
if (pos + 3 > end)
break;
if (os_memcmp(pos, plmn, 3) == 0)
return 1; /* Found matching PLMN */
}
}
pos = l_end;
}
return 0;
}
static int build_root_nai(char *nai, size_t nai_len, const char *imsi,
char prefix)
{
const char *sep, *msin;
char *end, *pos;
size_t msin_len, plmn_len;
/*
* TS 23.003, Clause 14 (3GPP to WLAN Interworking)
* Root NAI:
* <aka:0|sim:1><IMSI>@wlan.mnc<MNC>.mcc<MCC>.3gppnetwork.org
* <MNC> is zero-padded to three digits in case two-digit MNC is used
*/
if (imsi == NULL || os_strlen(imsi) > 16) {
wpa_printf(MSG_DEBUG, "No valid IMSI available");
return -1;
}
sep = os_strchr(imsi, '-');
if (sep == NULL)
return -1;
plmn_len = sep - imsi;
if (plmn_len != 5 && plmn_len != 6)
return -1;
msin = sep + 1;
msin_len = os_strlen(msin);
pos = nai;
end = nai + nai_len;
if (prefix)
*pos++ = prefix;
os_memcpy(pos, imsi, plmn_len);
pos += plmn_len;
os_memcpy(pos, msin, msin_len);
pos += msin_len;
pos += os_snprintf(pos, end - pos, "@wlan.mnc");
if (plmn_len == 5) {
*pos++ = '0';
*pos++ = imsi[3];
*pos++ = imsi[4];
} else {
*pos++ = imsi[3];
*pos++ = imsi[4];
*pos++ = imsi[5];
}
pos += os_snprintf(pos, end - pos, ".mcc%c%c%c.3gppnetwork.org",
imsi[0], imsi[1], imsi[2]);
return 0;
}
static int set_root_nai(struct wpa_ssid *ssid, const char *imsi, char prefix)
{
char nai[100];
if (build_root_nai(nai, sizeof(nai), imsi, prefix) < 0)
return -1;
return wpa_config_set_quoted(ssid, "identity", nai);
}
#endif /* INTERWORKING_3GPP */
static int interworking_connect_3gpp(struct wpa_supplicant *wpa_s,
struct wpa_bss *bss)
{
#ifdef INTERWORKING_3GPP
struct wpa_cred *cred;
struct wpa_ssid *ssid;
const u8 *ie;
if (bss->anqp_3gpp == NULL)
return -1;
for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
if (cred->imsi == NULL || !cred->imsi[0] ||
cred->milenage == NULL || !cred->milenage[0])
continue;
if (plmn_id_match(bss->anqp_3gpp, cred->imsi))
break;
}
if (cred == NULL)
return -1;
ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
if (ie == NULL)
return -1;
wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR " (3GPP)",
MAC2STR(bss->bssid));
ssid = wpa_config_add_network(wpa_s->conf);
if (ssid == NULL)
return -1;
wpas_notify_network_added(wpa_s, ssid);
wpa_config_set_network_defaults(ssid);
ssid->priority = cred->priority;
ssid->temporary = 1;
ssid->ssid = os_zalloc(ie[1] + 1);
if (ssid->ssid == NULL)
goto fail;
os_memcpy(ssid->ssid, ie + 2, ie[1]);
ssid->ssid_len = ie[1];
/* TODO: figure out whether to use EAP-SIM, EAP-AKA, or EAP-AKA' */
if (wpa_config_set(ssid, "eap", "SIM", 0) < 0) {
wpa_printf(MSG_DEBUG, "EAP-SIM not supported");
goto fail;
}
if (set_root_nai(ssid, cred->imsi, '1') < 0) {
wpa_printf(MSG_DEBUG, "Failed to set Root NAI");
goto fail;
}
if (cred->milenage && cred->milenage[0]) {
if (wpa_config_set_quoted(ssid, "password",
cred->milenage) < 0)
goto fail;
} else {
/* TODO: PIN */
if (wpa_config_set_quoted(ssid, "pcsc", "") < 0)
goto fail;
}
if (cred->password && cred->password[0] &&
wpa_config_set_quoted(ssid, "password", cred->password) < 0)
goto fail;
wpa_config_update_prio_list(wpa_s->conf);
wpa_s->disconnected = 0;
wpa_s->reassociate = 1;
wpa_supplicant_req_scan(wpa_s, 0, 0);
return 0;
fail:
wpas_notify_network_removed(wpa_s, ssid);
wpa_config_remove_network(wpa_s->conf, ssid->id);
#endif /* INTERWORKING_3GPP */
return -1;
}
int interworking_connect(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
{
struct wpa_cred *cred;
struct wpa_ssid *ssid;
struct nai_realm *realm;
struct nai_realm_eap *eap = NULL;
u16 count, i;
char buf[100];
const u8 *ie;
if (wpa_s->conf->cred == NULL || bss == NULL)
return -1;
ie = wpa_bss_get_ie(bss, WLAN_EID_SSID);
if (ie == NULL || ie[1] == 0) {
wpa_printf(MSG_DEBUG, "Interworking: No SSID known for "
MACSTR, MAC2STR(bss->bssid));
return -1;
}
realm = nai_realm_parse(bss->anqp_nai_realm, &count);
if (realm == NULL) {
wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
"Realm list from " MACSTR, MAC2STR(bss->bssid));
count = 0;
}
for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
for (i = 0; i < count; i++) {
if (!nai_realm_match(&realm[i], cred->realm))
continue;
eap = nai_realm_find_eap(cred, &realm[i]);
if (eap)
break;
}
if (eap)
break;
}
if (!eap) {
if (interworking_connect_3gpp(wpa_s, bss) == 0) {
if (realm)
nai_realm_free(realm, count);
return 0;
}
wpa_printf(MSG_DEBUG, "Interworking: No matching credentials "
"and EAP method found for " MACSTR,
MAC2STR(bss->bssid));
nai_realm_free(realm, count);
return -1;
}
wpa_printf(MSG_DEBUG, "Interworking: Connect with " MACSTR,
MAC2STR(bss->bssid));
ssid = wpa_config_add_network(wpa_s->conf);
if (ssid == NULL) {
nai_realm_free(realm, count);
return -1;
}
wpas_notify_network_added(wpa_s, ssid);
wpa_config_set_network_defaults(ssid);
ssid->priority = cred->priority;
ssid->temporary = 1;
ssid->ssid = os_zalloc(ie[1] + 1);
if (ssid->ssid == NULL)
goto fail;
os_memcpy(ssid->ssid, ie + 2, ie[1]);
ssid->ssid_len = ie[1];
if (wpa_config_set(ssid, "eap", eap_get_name(EAP_VENDOR_IETF,
eap->method), 0) < 0)
goto fail;
if (eap->method == EAP_TYPE_TTLS &&
cred->username && cred->username[0]) {
const char *pos;
char *anon;
/* Use anonymous NAI in Phase 1 */
pos = os_strchr(cred->username, '@');
if (pos) {
size_t buflen = 9 + os_strlen(pos) + 1;
anon = os_malloc(buflen);
if (anon == NULL)
goto fail;
os_snprintf(anon, buflen, "anonymous%s", pos);
} else {
anon = os_strdup("anonymous");
if (anon == NULL)
goto fail;
}
if (wpa_config_set_quoted(ssid, "anonymous_identity", anon) <
0) {
os_free(anon);
goto fail;
}
os_free(anon);
}
if (cred->username && cred->username[0] &&
wpa_config_set_quoted(ssid, "identity", cred->username) < 0)
goto fail;
if (cred->password && cred->password[0] &&
wpa_config_set_quoted(ssid, "password", cred->password) < 0)
goto fail;
if (cred->client_cert && cred->client_cert[0] &&
wpa_config_set_quoted(ssid, "client_cert", cred->client_cert) < 0)
goto fail;
if (cred->private_key && cred->private_key[0] &&
wpa_config_set_quoted(ssid, "private_key", cred->private_key) < 0)
goto fail;
if (cred->private_key_passwd && cred->private_key_passwd[0] &&
wpa_config_set_quoted(ssid, "private_key_passwd",
cred->private_key_passwd) < 0)
goto fail;
switch (eap->method) {
case EAP_TYPE_TTLS:
if (eap->inner_method) {
os_snprintf(buf, sizeof(buf), "\"autheap=%s\"",
eap_get_name(EAP_VENDOR_IETF,
eap->inner_method));
if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
goto fail;
break;
}
switch (eap->inner_non_eap) {
case NAI_REALM_INNER_NON_EAP_PAP:
if (wpa_config_set(ssid, "phase2", "\"auth=PAP\"", 0) <
0)
goto fail;
break;
case NAI_REALM_INNER_NON_EAP_CHAP:
if (wpa_config_set(ssid, "phase2", "\"auth=CHAP\"", 0)
< 0)
goto fail;
break;
case NAI_REALM_INNER_NON_EAP_MSCHAP:
if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAP\"",
0) < 0)
goto fail;
break;
case NAI_REALM_INNER_NON_EAP_MSCHAPV2:
if (wpa_config_set(ssid, "phase2", "\"auth=MSCHAPV2\"",
0) < 0)
goto fail;
break;
}
break;
case EAP_TYPE_PEAP:
os_snprintf(buf, sizeof(buf), "\"auth=%s\"",
eap_get_name(EAP_VENDOR_IETF, eap->inner_method));
if (wpa_config_set(ssid, "phase2", buf, 0) < 0)
goto fail;
break;
case EAP_TYPE_TLS:
break;
}
if (cred->ca_cert && cred->ca_cert[0] &&
wpa_config_set_quoted(ssid, "ca_cert", cred->ca_cert) < 0)
goto fail;
nai_realm_free(realm, count);
wpa_config_update_prio_list(wpa_s->conf);
wpa_s->disconnected = 0;
wpa_s->reassociate = 1;
wpa_supplicant_req_scan(wpa_s, 0, 0);
return 0;
fail:
wpas_notify_network_removed(wpa_s, ssid);
wpa_config_remove_network(wpa_s->conf, ssid->id);
nai_realm_free(realm, count);
return -1;
}
static struct wpa_cred * interworking_credentials_available_3gpp(
struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
{
struct wpa_cred *cred, *selected = NULL;
int ret;
#ifdef INTERWORKING_3GPP
if (bss->anqp_3gpp == NULL)
return NULL;
for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
if (cred->imsi == NULL || !cred->imsi[0] ||
cred->milenage == NULL || !cred->milenage[0])
continue;
wpa_printf(MSG_DEBUG, "Interworking: Parsing 3GPP info from "
MACSTR, MAC2STR(bss->bssid));
ret = plmn_id_match(bss->anqp_3gpp, cred->imsi);
wpa_printf(MSG_DEBUG, "PLMN match %sfound", ret ? "" : "not ");
if (ret) {
if (selected == NULL ||
selected->priority < cred->priority)
selected = cred;
}
}
#endif /* INTERWORKING_3GPP */
return selected;
}
static struct wpa_cred * interworking_credentials_available_realm(
struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
{
struct wpa_cred *cred, *selected = NULL;
struct nai_realm *realm;
u16 count, i;
if (bss->anqp_nai_realm == NULL)
return NULL;
if (wpa_s->conf->cred == NULL)
return NULL;
wpa_printf(MSG_DEBUG, "Interworking: Parsing NAI Realm list from "
MACSTR, MAC2STR(bss->bssid));
realm = nai_realm_parse(bss->anqp_nai_realm, &count);
if (realm == NULL) {
wpa_printf(MSG_DEBUG, "Interworking: Could not parse NAI "
"Realm list from " MACSTR, MAC2STR(bss->bssid));
return NULL;
}
for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
if (cred->realm == NULL)
continue;
for (i = 0; i < count; i++) {
if (!nai_realm_match(&realm[i], cred->realm))
continue;
if (nai_realm_find_eap(cred, &realm[i])) {
if (selected == NULL ||
selected->priority < cred->priority)
selected = cred;
break;
}
}
}
nai_realm_free(realm, count);
return selected;
}
static struct wpa_cred * interworking_credentials_available(
struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
{
struct wpa_cred *cred, *cred2;
cred = interworking_credentials_available_realm(wpa_s, bss);
cred2 = interworking_credentials_available_3gpp(wpa_s, bss);
if (cred && cred2 && cred2->priority >= cred->priority)
cred = cred2;
if (!cred)
cred = cred2;
return cred;
}
static int domain_name_list_contains(struct wpabuf *domain_names,
const char *domain)
{
const u8 *pos, *end;
size_t len;
len = os_strlen(domain);
pos = wpabuf_head(domain_names);
end = pos + wpabuf_len(domain_names);
while (pos + 1 < end) {
if (pos + 1 + pos[0] > end)
break;
wpa_hexdump_ascii(MSG_DEBUG, "Interworking: AP domain name",
pos + 1, pos[0]);
if (pos[0] == len &&
os_strncasecmp(domain, (const char *) (pos + 1), len) == 0)
return 1;
pos += 1 + pos[0];
}
return 0;
}
static int interworking_home_sp(struct wpa_supplicant *wpa_s,
struct wpabuf *domain_names)
{
struct wpa_cred *cred;
#ifdef INTERWORKING_3GPP
char nai[100], *realm;
#endif /* INTERWORKING_3GPP */
if (domain_names == NULL || wpa_s->conf->cred == NULL)
return -1;
for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
#ifdef INTERWORKING_3GPP
if (cred->imsi &&
build_root_nai(nai, sizeof(nai), cred->imsi, 0) == 0) {
realm = os_strchr(nai, '@');
if (realm)
realm++;
wpa_printf(MSG_DEBUG, "Interworking: Search for match "
"with SIM/USIM domain %s", realm);
if (realm &&
domain_name_list_contains(domain_names, realm))
return 1;
}
#endif /* INTERWORKING_3GPP */
if (cred->domain == NULL)
continue;
wpa_printf(MSG_DEBUG, "Interworking: Search for match with "
"home SP FQDN %s", cred->domain);
if (domain_name_list_contains(domain_names, cred->domain))
return 1;
}
return 0;
}
static int interworking_find_network_match(struct wpa_supplicant *wpa_s)
{
struct wpa_bss *bss;
struct wpa_ssid *ssid;
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
if (ssid->disabled || ssid->mode != WPAS_MODE_INFRA)
continue;
if (ssid->ssid_len != bss->ssid_len ||
os_memcmp(ssid->ssid, bss->ssid, ssid->ssid_len) !=
0)
continue;
/*
* TODO: Consider more accurate matching of security
* configuration similarly to what is done in events.c
*/
return 1;
}
}
return 0;
}
static void interworking_select_network(struct wpa_supplicant *wpa_s)
{
struct wpa_bss *bss, *selected = NULL, *selected_home = NULL;
int selected_prio = -999999, selected_home_prio = -999999;
unsigned int count = 0;
const char *type;
int res;
struct wpa_cred *cred;
wpa_s->network_select = 0;
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
cred = interworking_credentials_available(wpa_s, bss);
if (!cred)
continue;
count++;
res = interworking_home_sp(wpa_s, bss->anqp_domain_name);
if (res > 0)
type = "home";
else if (res == 0)
type = "roaming";
else
type = "unknown";
wpa_msg(wpa_s, MSG_INFO, INTERWORKING_AP MACSTR " type=%s",
MAC2STR(bss->bssid), type);
if (wpa_s->auto_select) {
if (selected == NULL ||
cred->priority > selected_prio) {
selected = bss;
selected_prio = cred->priority;
}
if (res > 0 &&
(selected_home == NULL ||
cred->priority > selected_home_prio)) {
selected_home = bss;
selected_home_prio = cred->priority;
}
}
}
if (selected_home && selected_home != selected &&
selected_home_prio >= selected_prio) {
/* Prefer network operated by the Home SP */
selected = selected_home;
}
if (count == 0) {
/*
* No matching network was found based on configured
* credentials. Check whether any of the enabled network blocks
* have matching APs.
*/
if (interworking_find_network_match(wpa_s)) {
wpa_printf(MSG_DEBUG, "Interworking: Possible BSS "
"match for enabled network configurations");
wpa_s->disconnected = 0;
wpa_s->reassociate = 1;
wpa_supplicant_req_scan(wpa_s, 0, 0);
return;
}
wpa_msg(wpa_s, MSG_INFO, INTERWORKING_NO_MATCH "No network "
"with matching credentials found");
}
if (selected)
interworking_connect(wpa_s, selected);
}
static void interworking_next_anqp_fetch(struct wpa_supplicant *wpa_s)
{
struct wpa_bss *bss;
int found = 0;
const u8 *ie;
if (!wpa_s->fetch_anqp_in_progress)
return;
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
if (!(bss->caps & IEEE80211_CAP_ESS))
continue;
ie = wpa_bss_get_ie(bss, WLAN_EID_EXT_CAPAB);
if (ie == NULL || ie[1] < 4 || !(ie[5] & 0x80))
continue; /* AP does not support Interworking */
if (!(bss->flags & WPA_BSS_ANQP_FETCH_TRIED)) {
found++;
bss->flags |= WPA_BSS_ANQP_FETCH_TRIED;
wpa_msg(wpa_s, MSG_INFO, "Starting ANQP fetch for "
MACSTR, MAC2STR(bss->bssid));
interworking_anqp_send_req(wpa_s, bss);
break;
}
}
if (found == 0) {
wpa_msg(wpa_s, MSG_INFO, "ANQP fetch completed");
wpa_s->fetch_anqp_in_progress = 0;
if (wpa_s->network_select)
interworking_select_network(wpa_s);
}
}
static void interworking_start_fetch_anqp(struct wpa_supplicant *wpa_s)
{
struct wpa_bss *bss;
dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list)
bss->flags &= ~WPA_BSS_ANQP_FETCH_TRIED;
wpa_s->fetch_anqp_in_progress = 1;
interworking_next_anqp_fetch(wpa_s);
}
int interworking_fetch_anqp(struct wpa_supplicant *wpa_s)
{
if (wpa_s->fetch_anqp_in_progress || wpa_s->network_select)
return 0;
wpa_s->network_select = 0;
interworking_start_fetch_anqp(wpa_s);
return 0;
}
void interworking_stop_fetch_anqp(struct wpa_supplicant *wpa_s)
{
if (!wpa_s->fetch_anqp_in_progress)
return;
wpa_s->fetch_anqp_in_progress = 0;
}
int anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst,
u16 info_ids[], size_t num_ids)
{
struct wpabuf *buf;
int ret = 0;
int freq;
struct wpa_bss *bss;
int res;
freq = wpa_s->assoc_freq;
bss = wpa_bss_get_bssid(wpa_s, dst);
if (bss)
freq = bss->freq;
if (freq <= 0)
return -1;
wpa_printf(MSG_DEBUG, "ANQP: Query Request to " MACSTR " for %u id(s)",
MAC2STR(dst), (unsigned int) num_ids);
buf = anqp_build_req(info_ids, num_ids, NULL);
if (buf == NULL)
return -1;
res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
if (res < 0) {
wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
ret = -1;
} else
wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
"%u", res);
wpabuf_free(buf);
return ret;
}
static void interworking_parse_rx_anqp_resp(struct wpa_supplicant *wpa_s,
const u8 *sa, u16 info_id,
const u8 *data, size_t slen)
{
const u8 *pos = data;
struct wpa_bss *bss = wpa_bss_get_bssid(wpa_s, sa);
switch (info_id) {
case ANQP_CAPABILITY_LIST:
wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
" ANQP Capability list", MAC2STR(sa));
break;
case ANQP_VENUE_NAME:
wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
" Venue Name", MAC2STR(sa));
wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Venue Name", pos, slen);
if (bss) {
wpabuf_free(bss->anqp_venue_name);
bss->anqp_venue_name = wpabuf_alloc_copy(pos, slen);
}
break;
case ANQP_NETWORK_AUTH_TYPE:
wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
" Network Authentication Type information",
MAC2STR(sa));
wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Network Authentication "
"Type", pos, slen);
if (bss) {
wpabuf_free(bss->anqp_network_auth_type);
bss->anqp_network_auth_type =
wpabuf_alloc_copy(pos, slen);
}
break;
case ANQP_ROAMING_CONSORTIUM:
wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
" Roaming Consortium list", MAC2STR(sa));
wpa_hexdump_ascii(MSG_DEBUG, "ANQP: Roaming Consortium",
pos, slen);
if (bss) {
wpabuf_free(bss->anqp_roaming_consortium);
bss->anqp_roaming_consortium =
wpabuf_alloc_copy(pos, slen);
}
break;
case ANQP_IP_ADDR_TYPE_AVAILABILITY:
wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
" IP Address Type Availability information",
MAC2STR(sa));
wpa_hexdump(MSG_MSGDUMP, "ANQP: IP Address Availability",
pos, slen);
if (bss) {
wpabuf_free(bss->anqp_ip_addr_type_availability);
bss->anqp_ip_addr_type_availability =
wpabuf_alloc_copy(pos, slen);
}
break;
case ANQP_NAI_REALM:
wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
" NAI Realm list", MAC2STR(sa));
wpa_hexdump_ascii(MSG_DEBUG, "ANQP: NAI Realm", pos, slen);
if (bss) {
wpabuf_free(bss->anqp_nai_realm);
bss->anqp_nai_realm = wpabuf_alloc_copy(pos, slen);
}
break;
case ANQP_3GPP_CELLULAR_NETWORK:
wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
" 3GPP Cellular Network information", MAC2STR(sa));
wpa_hexdump_ascii(MSG_DEBUG, "ANQP: 3GPP Cellular Network",
pos, slen);
if (bss) {
wpabuf_free(bss->anqp_3gpp);
bss->anqp_3gpp = wpabuf_alloc_copy(pos, slen);
}
break;
case ANQP_DOMAIN_NAME:
wpa_msg(wpa_s, MSG_INFO, "RX-ANQP " MACSTR
" Domain Name list", MAC2STR(sa));
wpa_hexdump_ascii(MSG_MSGDUMP, "ANQP: Domain Name", pos, slen);
if (bss) {
wpabuf_free(bss->anqp_domain_name);
bss->anqp_domain_name = wpabuf_alloc_copy(pos, slen);
}
break;
case ANQP_VENDOR_SPECIFIC:
if (slen < 3)
return;
switch (WPA_GET_BE24(pos)) {
default:
wpa_printf(MSG_DEBUG, "Interworking: Unsupported "
"vendor-specific ANQP OUI %06x",
WPA_GET_BE24(pos));
return;
}
break;
default:
wpa_printf(MSG_DEBUG, "Interworking: Unsupported ANQP Info ID "
"%u", info_id);
break;
}
}
void anqp_resp_cb(void *ctx, const u8 *dst, u8 dialog_token,
enum gas_query_result result,
const struct wpabuf *adv_proto,
const struct wpabuf *resp, u16 status_code)
{
struct wpa_supplicant *wpa_s = ctx;
const u8 *pos;
const u8 *end;
u16 info_id;
u16 slen;
if (result != GAS_QUERY_SUCCESS)
return;
pos = wpabuf_head(adv_proto);
if (wpabuf_len(adv_proto) < 4 || pos[0] != WLAN_EID_ADV_PROTO ||
pos[1] < 2 || pos[3] != ACCESS_NETWORK_QUERY_PROTOCOL) {
wpa_printf(MSG_DEBUG, "ANQP: Unexpected Advertisement "
"Protocol in response");
return;
}
pos = wpabuf_head(resp);
end = pos + wpabuf_len(resp);
while (pos < end) {
if (pos + 4 > end) {
wpa_printf(MSG_DEBUG, "ANQP: Invalid element");
break;
}
info_id = WPA_GET_LE16(pos);
pos += 2;
slen = WPA_GET_LE16(pos);
pos += 2;
if (pos + slen > end) {
wpa_printf(MSG_DEBUG, "ANQP: Invalid element length "
"for Info ID %u", info_id);
break;
}
interworking_parse_rx_anqp_resp(wpa_s, dst, info_id, pos,
slen);
pos += slen;
}
}
static void interworking_scan_res_handler(struct wpa_supplicant *wpa_s,
struct wpa_scan_results *scan_res)
{
wpa_printf(MSG_DEBUG, "Interworking: Scan results available - start "
"ANQP fetch");
interworking_start_fetch_anqp(wpa_s);
}
int interworking_select(struct wpa_supplicant *wpa_s, int auto_select)
{
interworking_stop_fetch_anqp(wpa_s);
wpa_s->network_select = 1;
wpa_s->auto_select = !!auto_select;
wpa_printf(MSG_DEBUG, "Interworking: Start scan for network "
"selection");
wpa_s->scan_res_handler = interworking_scan_res_handler;
wpa_s->scan_req = 2;
wpa_supplicant_req_scan(wpa_s, 0, 0);
return 0;
}
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