This adds new wpa_supplicant control interface commands PMKSA_GET and
PMKSA_ADD that can be used to store PMKSA cache entries in an external
persistent storage when terminating a wpa_supplicant process and then
restore those entries when starting a new process. The previously added
PMKSA-CACHE-ADDED/REMOVED events can be used to help in synchronizing
the external storage with the memory-only volatile storage within
wpa_supplicant.
"PMKSA_GET <network_id>" fetches all stored PMKSA cache entries bound to
a specific network profile. The network_id of the current profile is
available with the STATUS command (id=<network_id). In addition, the
network_id is included in the PMKSA-CACHE-ADDED/REMOVED events. The
output of the PMKSA_GET command uses the following format:
<BSSID> <PMKID> <PMK> <reauth_time in seconds> <expiration in seconds>
<akmp> <opportunistic>
For example:
02:00:00:00:03:00
113b8b5dc8eda16594e8274df4caa3d4 355e98681d09e0b69d3a342f96998aa765d10c4459ac592459b5efc6b563eff6 30240 43200 1 0
02:00:00:00:04:00
bbdac8607aaaac28e16aacc9152ffe23 e3dd6adc390e685985e5f40e6fe72df846a0acadc59ba15c208d9cb41732a663 30240 43200 1 0
The PMKSA_GET command uses the following format:
<network_id> <BSSID> <PMKID> <PMK> <reauth_time in seconds> <expiration
in seconds> <akmp> <opportunistic>
(i.e., "PMKSA_ADD <network_id> " prefix followed by a line of PMKSA_GET
output data; however, the reauth_time and expiration values need to be
updated by decrementing them by number of seconds between the PMKSA_GET
and PMKSA_ADD commands)
For example:
PMKSA_ADD 0 02:00:00:00:03:00
113b8b5dc8eda16594e8274df4caa3d4 355e98681d09e0b69d3a342f96998aa765d10c4459ac592459b5efc6b563eff6 30140 43100 1 0
PMKSA_ADD 0 02:00:00:00:04:00
bbdac8607aaaac28e16aacc9152ffe23 e3dd6adc390e685985e5f40e6fe72df846a0acadc59ba15c208d9cb41732a663 30140 43100 1 0
This functionality is disabled be default and can be enabled with
CONFIG_PMKSA_CACHE_EXTERNAL=y build configuration option. It should be
noted that this allows any process that has access to the wpa_supplicant
control interface to use PMKSA_ADD command to fetch keying material
(PMK), so this is for environments in which the control interface access
is restricted.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
const u8 *pmkid, const u8 *kck, size_t kck_len,
const u8 *aa, const u8 *spa, void *network_ctx, int akmp)
{
- struct rsn_pmksa_cache_entry *entry, *pos, *prev;
+ struct rsn_pmksa_cache_entry *entry;
struct os_reltime now;
if (pmk_len > PMK_LEN_MAX)
os_memcpy(entry->aa, aa, ETH_ALEN);
entry->network_ctx = network_ctx;
+ return pmksa_cache_add_entry(pmksa, entry);
+}
+
+
+struct rsn_pmksa_cache_entry *
+pmksa_cache_add_entry(struct rsn_pmksa_cache *pmksa,
+ struct rsn_pmksa_cache_entry *entry)
+{
+ struct rsn_pmksa_cache_entry *pos, *prev;
+
/* Replace an old entry for the same Authenticator (if found) with the
* new entry */
pos = pmksa->pmksa;
prev = NULL;
while (pos) {
- if (os_memcmp(aa, pos->aa, ETH_ALEN) == 0) {
- if (pos->pmk_len == pmk_len &&
- os_memcmp_const(pos->pmk, pmk, pmk_len) == 0 &&
+ if (os_memcmp(entry->aa, pos->aa, ETH_ALEN) == 0) {
+ if (pos->pmk_len == entry->pmk_len &&
+ os_memcmp_const(pos->pmk, entry->pmk,
+ entry->pmk_len) == 0 &&
os_memcmp_const(pos->pmkid, entry->pmkid,
PMKID_LEN) == 0) {
wpa_printf(MSG_DEBUG, "WPA: reusing previous "
"the current AP and any PMKSA cache entry "
"that was based on the old PMK");
if (!pos->opportunistic)
- pmksa_cache_flush(pmksa, network_ctx, pos->pmk,
- pos->pmk_len);
+ pmksa_cache_flush(pmksa, entry->network_ctx,
+ pos->pmk, pos->pmk_len);
pmksa_cache_free_entry(pmksa, pos, PMKSA_REPLACE);
break;
}
}
pmksa->pmksa_count++;
wpa_printf(MSG_DEBUG, "RSN: Added PMKSA cache entry for " MACSTR
- " network_ctx=%p", MAC2STR(entry->aa), network_ctx);
- wpa_sm_add_pmkid(pmksa->sm, network_ctx, entry->aa, entry->pmkid);
+ " network_ctx=%p", MAC2STR(entry->aa), entry->network_ctx);
+ wpa_sm_add_pmkid(pmksa->sm, entry->network_ctx, entry->aa,
+ entry->pmkid);
return entry;
}
}
+struct rsn_pmksa_cache_entry * pmksa_cache_head(struct rsn_pmksa_cache *pmksa)
+{
+ return pmksa->pmksa;
+}
+
+
/**
* pmksa_cache_init - Initialize PMKSA cache
* @free_cb: Callback function to be called when a PMKSA cache entry is freed
const u8 *aa, const u8 *pmkid,
const void *network_ctx);
int pmksa_cache_list(struct rsn_pmksa_cache *pmksa, char *buf, size_t len);
+struct rsn_pmksa_cache_entry * pmksa_cache_head(struct rsn_pmksa_cache *pmksa);
struct rsn_pmksa_cache_entry *
pmksa_cache_add(struct rsn_pmksa_cache *pmksa, const u8 *pmk, size_t pmk_len,
const u8 *pmkid, const u8 *kck, size_t kck_len,
const u8 *aa, const u8 *spa, void *network_ctx, int akmp);
+struct rsn_pmksa_cache_entry *
+pmksa_cache_add_entry(struct rsn_pmksa_cache *pmksa,
+ struct rsn_pmksa_cache_entry *entry);
struct rsn_pmksa_cache_entry * pmksa_cache_get_current(struct wpa_sm *sm);
void pmksa_cache_clear_current(struct wpa_sm *sm);
int pmksa_cache_set_current(struct wpa_sm *sm, const u8 *pmkid,
}
+struct rsn_pmksa_cache_entry * wpa_sm_pmksa_cache_head(struct wpa_sm *sm)
+{
+ return pmksa_cache_head(sm->pmksa);
+}
+
+
+struct rsn_pmksa_cache_entry *
+wpa_sm_pmksa_cache_add_entry(struct wpa_sm *sm,
+ struct rsn_pmksa_cache_entry * entry)
+{
+ return pmksa_cache_add_entry(sm->pmksa, entry);
+}
+
+
void wpa_sm_drop_sa(struct wpa_sm *sm)
{
wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Clear old PMK and PTK");
const u8 *buf, size_t len);
int wpa_sm_parse_own_wpa_ie(struct wpa_sm *sm, struct wpa_ie_data *data);
int wpa_sm_pmksa_cache_list(struct wpa_sm *sm, char *buf, size_t len);
+struct rsn_pmksa_cache_entry * wpa_sm_pmksa_cache_head(struct wpa_sm *sm);
+struct rsn_pmksa_cache_entry *
+wpa_sm_pmksa_cache_add_entry(struct wpa_sm *sm,
+ struct rsn_pmksa_cache_entry * entry);
void wpa_sm_drop_sa(struct wpa_sm *sm);
int wpa_sm_has_ptk(struct wpa_sm *sm);
L_CFLAGS += -DCONFIG_PEERKEY
endif
+ifdef CONFIG_PMKSA_CACHE_EXTERNAL
+L_CFLAGS += -DCONFIG_PMKSA_CACHE_EXTERNAL
+endif
+
ifndef CONFIG_NO_WPA
OBJS += src/rsn_supp/wpa.c
OBJS += src/rsn_supp/preauth.c
CFLAGS += -DCONFIG_PEERKEY
endif
+ifdef CONFIG_PMKSA_CACHE_EXTERNAL
+CFLAGS += -DCONFIG_PMKSA_CACHE_EXTERNAL
+endif
+
ifndef CONFIG_NO_WPA
OBJS += ../src/rsn_supp/wpa.o
OBJS += ../src/rsn_supp/preauth.o
# Support Multi Band Operation
#CONFIG_MBO=y
+# External PMKSA cache control
+# This can be used to enable control interface commands that allow the current
+# PMKSA cache entries to be fetched and new entries to be added.
+#CONFIG_PMKSA_CACHE_EXTERNAL=y
+
include $(wildcard $(LOCAL_PATH)/android_config_*.inc)
}
+#ifdef CONFIG_PMKSA_CACHE_EXTERNAL
+
+static int wpas_ctrl_iface_pmksa_get(struct wpa_supplicant *wpa_s,
+ const char *cmd, char *buf, size_t buflen)
+{
+ struct rsn_pmksa_cache_entry *entry;
+ struct wpa_ssid *ssid;
+ char *pos, *pos2, *end;
+ int ret;
+ struct os_reltime now;
+
+ ssid = wpa_config_get_network(wpa_s->conf, atoi(cmd));
+ if (!ssid)
+ return -1;
+
+ pos = buf;
+ end = buf + buflen;
+
+ os_get_reltime(&now);
+
+ /*
+ * Entry format:
+ * <BSSID> <PMKID> <PMK> <reauth_time in seconds>
+ * <expiration in seconds> <akmp> <opportunistic>
+ */
+
+ for (entry = wpa_sm_pmksa_cache_head(wpa_s->wpa); entry;
+ entry = entry->next) {
+ if (entry->network_ctx != ssid)
+ continue;
+
+ pos2 = pos;
+ ret = os_snprintf(pos2, end - pos2, MACSTR " ",
+ MAC2STR(entry->aa));
+ if (os_snprintf_error(end - pos2, ret))
+ break;
+ pos2 += ret;
+
+ pos2 += wpa_snprintf_hex(pos2, end - pos2, entry->pmkid,
+ PMKID_LEN);
+
+ ret = os_snprintf(pos2, end - pos2, " ");
+ if (os_snprintf_error(end - pos2, ret))
+ break;
+ pos2 += ret;
+
+ pos2 += wpa_snprintf_hex(pos2, end - pos2, entry->pmk,
+ entry->pmk_len);
+
+ ret = os_snprintf(pos2, end - pos2, " %d %d %d %d",
+ (int) (entry->reauth_time - now.sec),
+ (int) (entry->expiration - now.sec),
+ entry->akmp,
+ entry->opportunistic);
+ if (os_snprintf_error(end - pos2, ret))
+ break;
+ pos2 += ret;
+
+ ret = os_snprintf(pos2, end - pos2, "\n");
+ if (os_snprintf_error(end - pos2, ret))
+ break;
+ pos2 += ret;
+
+ pos = pos2;
+ }
+
+ return pos - buf;
+}
+
+
+static int wpas_ctrl_iface_pmksa_add(struct wpa_supplicant *wpa_s,
+ char *cmd)
+{
+ struct rsn_pmksa_cache_entry *entry;
+ struct wpa_ssid *ssid;
+ char *pos, *pos2;
+ int ret = -1;
+ struct os_reltime now;
+ int reauth_time = 0, expiration = 0;
+
+ /*
+ * Entry format:
+ * <network_id> <BSSID> <PMKID> <PMK> <reauth_time in seconds>
+ * <expiration in seconds> <akmp> <opportunistic>
+ */
+
+ ssid = wpa_config_get_network(wpa_s->conf, atoi(cmd));
+ if (!ssid)
+ return -1;
+
+ pos = os_strchr(cmd, ' ');
+ if (!pos)
+ return -1;
+ pos++;
+
+ entry = os_zalloc(sizeof(*entry));
+ if (!entry)
+ return -1;
+
+ if (hwaddr_aton(pos, entry->aa))
+ goto fail;
+
+ pos = os_strchr(pos, ' ');
+ if (!pos)
+ goto fail;
+ pos++;
+
+ if (hexstr2bin(pos, entry->pmkid, PMKID_LEN) < 0)
+ goto fail;
+
+ pos = os_strchr(pos, ' ');
+ if (!pos)
+ goto fail;
+ pos++;
+
+ pos2 = os_strchr(pos, ' ');
+ if (!pos2)
+ goto fail;
+ entry->pmk_len = (pos2 - pos) / 2;
+ if (entry->pmk_len < PMK_LEN || entry->pmk_len > PMK_LEN_MAX ||
+ hexstr2bin(pos, entry->pmk, entry->pmk_len) < 0)
+ goto fail;
+
+ pos = os_strchr(pos, ' ');
+ if (!pos)
+ goto fail;
+ pos++;
+
+ if (sscanf(pos, "%d %d %d %d", &reauth_time, &expiration,
+ &entry->akmp, &entry->opportunistic) != 4)
+ goto fail;
+ os_get_reltime(&now);
+ entry->expiration = now.sec + expiration;
+ entry->reauth_time = now.sec + reauth_time;
+
+ entry->network_ctx = ssid;
+
+ wpa_sm_pmksa_cache_add_entry(wpa_s->wpa, entry);
+ entry = NULL;
+ ret = 0;
+fail:
+ os_free(entry);
+ return ret;
+}
+
+#endif /* CONFIG_PMKSA_CACHE_EXTERNAL */
+
+
static int wpas_ctrl_cmd_debug_level(const char *cmd)
{
if (os_strcmp(cmd, "PING") == 0 ||
reply_len = wpas_ctrl_iface_pmksa(wpa_s, reply, reply_size);
} else if (os_strcmp(buf, "PMKSA_FLUSH") == 0) {
wpas_ctrl_iface_pmksa_flush(wpa_s);
+#ifdef CONFIG_PMKSA_CACHE_EXTERNAL
+ } else if (os_strncmp(buf, "PMKSA_GET ", 10) == 0) {
+ reply_len = wpas_ctrl_iface_pmksa_get(wpa_s, buf + 10,
+ reply, reply_size);
+ } else if (os_strncmp(buf, "PMKSA_ADD ", 10) == 0) {
+ if (wpas_ctrl_iface_pmksa_add(wpa_s, buf + 10) < 0)
+ reply_len = -1;
+#endif /* CONFIG_PMKSA_CACHE_EXTERNAL */
} else if (os_strncmp(buf, "SET ", 4) == 0) {
if (wpa_supplicant_ctrl_iface_set(wpa_s, buf + 4))
reply_len = -1;
# This is needed to be able to use mode=1 network profile with proto=RSN and
# key_mgmt=WPA-PSK (i.e., full key management instead of WPA-None).
#CONFIG_IBSS_RSN=y
+
+# External PMKSA cache control
+# This can be used to enable control interface commands that allow the current
+# PMKSA cache entries to be fetched and new entries to be added.
+#CONFIG_PMKSA_CACHE_EXTERNAL=y
projects / thirdparty / hostap.git / commitdiff
