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mesh: Add MESH_PMKSA_GET/ADD commands

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These commnds are mesh version of PMKSA_GET/ADD commands. So the usage
and security risk is similar to them. Refer to
commit 3459381dd2 ('External persistent
storage for PMKSA cache entries') also.

The MESH_PMKSA_GET command requires peer MAC address or "any" as an
argument and outputs appropriate stored PMKSA cache. And the
MESH_PMKSA_ADD command receives an output of MESH_PMKSA_GET and re-store
the PMKSA cache into wpa_supplicant. By using re-stored PMKSA cache,
wpa_supplicant can skip commit message creation which can use
significant CPU resources.

The output of the MESH_PMKSA_GET command uses the following format:
<BSSID> <PMKID> <PMK> <expiration in seconds>

The example of MESH_PMKSA_ADD command is this.
MESH_PMKSA_ADD 02:00:00:00:03:00 231dc1c9fa2eed0354ea49e8ff2cc2dc cb0f6c9cab358a8146488566ca155421ab4f3ea4a6de2120050c149b797018fe 42930
MESH_PMKSA_ADD 02:00:00:00:04:00 d7e595916611640d3e4e8eac02909c3c eb414a33c74831275f25c2357b3c12e3d8bd2f2aab6cf781d6ade706be71321a 43180

This functionality is disabled by default and can be enabled with
CONFIG_PMKSA_CACHE_EXTERNAL=y build configuration option.

Signed-off-by: Masashi Honma <masashi.honma@gmail.com>
This commit is contained in:
Masashi Honma 2017-01-02 19:32:07 +09:00 • committed by Jouni Malinen
parent 117875db33
commit 4d77d80edd
13 changed files with 411 additions and 3 deletions
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7
src/ap/wpa_auth.h
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@ -302,6 +302,13 @@ void wpa_auth_pmksa_remove(struct wpa_authenticator *wpa_auth,
int wpa_auth_pmksa_list(struct wpa_authenticator *wpa_auth, char *buf,
size_t len);
void wpa_auth_pmksa_flush(struct wpa_authenticator *wpa_auth);
int wpa_auth_pmksa_list_mesh(struct wpa_authenticator *wpa_auth, const u8 *addr,
char *buf, size_t len);
struct rsn_pmksa_cache_entry *
wpa_auth_pmksa_create_entry(const u8 *aa, const u8 *spa, const u8 *pmk,
const u8 *pmkid, int expiration);
int wpa_auth_pmksa_add_entry(struct wpa_authenticator *wpa_auth,
struct rsn_pmksa_cache_entry *entry);
struct rsn_pmksa_cache_entry *
wpa_auth_pmksa_get(struct wpa_authenticator *wpa_auth, const u8 *sta_addr,
const u8 *pmkid);