WPA: Add PTKSA cache to wpa_supplicant for PASN
PASN requires to store the PTK derived during PASN authentication so it can later be used for secure LTF etc. This is also true for a PTK derived during regular connection. Add an instance of a PTKSA cache for each wpa_supplicant interface when PASN is enabled in build configuration. Signed-off-by: Ilan Peer <ilan.peer@intel.com>
This commit is contained in:
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a4e3691616
commit
d70060f966
11 changed files with 59 additions and 2 deletions
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@ -949,6 +949,9 @@ static int wpa_supplicant_install_ptk(struct wpa_sm *sm,
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return -1;
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}
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wpa_sm_store_ptk(sm, sm->bssid, sm->pairwise_cipher,
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sm->dot11RSNAConfigPMKLifetime, &sm->ptk);
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/* TK is not needed anymore in supplicant */
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os_memset(sm->ptk.tk, 0, WPA_TK_MAX_LEN);
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sm->ptk.tk_len = 0;
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@ -4916,6 +4919,9 @@ int fils_process_assoc_resp(struct wpa_sm *sm, const u8 *resp, size_t len)
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goto fail;
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}
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wpa_sm_store_ptk(sm, sm->bssid, sm->pairwise_cipher,
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sm->dot11RSNAConfigPMKLifetime, &sm->ptk);
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/* TODO: TK could be cleared after auth frame exchange now that driver
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* takes care of association frame encryption/decryption. */
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/* TK is not needed anymore in supplicant */
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@ -87,6 +87,8 @@ struct wpa_sm_ctx {
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const u8 *pkt, size_t pkt_len);
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int (*channel_info)(void *ctx, struct wpa_channel_info *ci);
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void (*transition_disable)(void *ctx, u8 bitmap);
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void (*store_ptk)(void *ctx, u8 *addr, int cipher,
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u32 life_time, const struct wpa_ptk *ptk);
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};
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@ -449,6 +449,8 @@ static int wpa_ft_install_ptk(struct wpa_sm *sm, const u8 *bssid)
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return -1;
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}
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wpa_sm_store_ptk(sm, sm->bssid, sm->pairwise_cipher,
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sm->dot11RSNAConfigPMKLifetime, &sm->ptk);
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return 0;
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}
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@ -447,6 +447,14 @@ static inline void wpa_sm_transition_disable(struct wpa_sm *sm, u8 bitmap)
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sm->ctx->transition_disable(sm->ctx->ctx, bitmap);
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}
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static inline void wpa_sm_store_ptk(struct wpa_sm *sm,
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u8 *addr, int cipher,
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u32 life_time, struct wpa_ptk *ptk)
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{
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if (sm->ctx->store_ptk)
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sm->ctx->store_ptk(sm->ctx->ctx, addr, cipher, life_time,
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ptk);
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}
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int wpa_eapol_key_send(struct wpa_sm *sm, struct wpa_ptk *ptk,
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int ver, const u8 *dest, u16 proto,
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@ -373,10 +373,12 @@ endif
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ifdef CONFIG_PASN
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L_CFLAGS += -DCONFIG_PASN
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L_CFLAGS += -DCONFIG_PTKSA_CACHE
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NEED_HMAC_SHA256_KDF=y
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NEED_HMAC_SHA384_KDF=y
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NEED_SHA256=y
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NEED_SHA384=y
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OBJS += src/common/ptksa_cache.c
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endif
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ifdef CONFIG_HS20
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@ -392,10 +392,12 @@ endif
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ifdef CONFIG_PASN
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CFLAGS += -DCONFIG_PASN
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CFLAGS += -DCONFIG_PTKSA_CACHE
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NEED_HMAC_SHA256_KDF=y
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NEED_HMAC_SHA384_KDF=y
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NEED_SHA256=y
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NEED_SHA384=y
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OBJS += ../src/common/ptksa_cache.o
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endif
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ifdef CONFIG_HS20
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@ -22,6 +22,7 @@
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#ifdef CONFIG_DPP
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#include "common/dpp.h"
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#endif /* CONFIG_DPP */
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#include "common/ptksa_cache.h"
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#include "crypto/tls.h"
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#include "ap/hostapd.h"
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#include "eap_peer/eap.h"
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@ -8431,6 +8432,7 @@ static void wpa_supplicant_ctrl_iface_flush(struct wpa_supplicant *wpa_s)
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wpa_s->conf->auto_interworking = 0;
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wpa_s->conf->okc = 0;
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ptksa_cache_flush(wpa_s->ptksa, NULL, WPA_CIPHER_NONE);
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wpa_sm_pmksa_cache_flush(wpa_s->wpa, NULL);
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rsn_preauth_deinit(wpa_s->wpa);
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@ -10108,6 +10110,7 @@ static int wpas_ctrl_iface_pmksa(struct wpa_supplicant *wpa_s,
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static void wpas_ctrl_iface_pmksa_flush(struct wpa_supplicant *wpa_s)
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{
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ptksa_cache_flush(wpa_s->ptksa, NULL, WPA_CIPHER_NONE);
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wpa_sm_pmksa_cache_flush(wpa_s->wpa, NULL);
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#ifdef CONFIG_AP
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wpas_ap_pmksa_cache_flush(wpa_s);
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@ -30,6 +30,7 @@
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#include "common/ieee802_11_common.h"
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#include "common/gas_server.h"
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#include "common/dpp.h"
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#include "common/ptksa_cache.h"
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#include "crypto/random.h"
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#include "blacklist.h"
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#include "wpas_glue.h"
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@ -3482,6 +3483,8 @@ static void wpa_supplicant_event_disassoc_finish(struct wpa_supplicant *wpa_s,
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if (wpa_s->wpa_state >= WPA_AUTHENTICATING)
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wpas_connection_failed(wpa_s, bssid);
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wpa_sm_notify_disassoc(wpa_s->wpa);
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ptksa_cache_flush(wpa_s->ptksa, wpa_s->bssid, WPA_CIPHER_NONE);
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if (locally_generated)
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wpa_s->disconnect_reason = -reason_code;
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else
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@ -41,6 +41,7 @@
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#include "common/hw_features_common.h"
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#include "common/gas_server.h"
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#include "common/dpp.h"
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#include "common/ptksa_cache.h"
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#include "p2p/p2p.h"
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#include "fst/fst.h"
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#include "blacklist.h"
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@ -573,6 +574,8 @@ static void wpa_supplicant_cleanup(struct wpa_supplicant *wpa_s)
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wmm_ac_clear_saved_tspecs(wpa_s);
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pmksa_candidate_free(wpa_s->wpa);
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ptksa_cache_deinit(wpa_s->ptksa);
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wpa_s->ptksa = NULL;
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wpa_sm_deinit(wpa_s->wpa);
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wpa_s->wpa = NULL;
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wpa_blacklist_clear(wpa_s);
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@ -639,6 +639,8 @@ struct wpa_supplicant {
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int interface_removed; /* whether the network interface has been
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* removed */
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struct wpa_sm *wpa;
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struct ptksa_cache *ptksa;
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struct eapol_sm *eapol;
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struct ctrl_iface_priv *ctrl_iface;
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@ -16,6 +16,7 @@
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#include "config.h"
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#include "l2_packet/l2_packet.h"
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#include "common/wpa_common.h"
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#include "common/ptksa_cache.h"
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#include "wpa_supplicant_i.h"
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#include "driver_i.h"
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#include "rsn_supp/pmksa_cache.h"
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@ -1341,6 +1342,15 @@ static void wpa_supplicant_transition_disable(void *_wpa_s, u8 bitmap)
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#endif /* CONFIG_NO_CONFIG_WRITE */
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}
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static void wpa_supplicant_store_ptk(void *ctx, u8 *addr, int cipher,
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u32 life_time, const struct wpa_ptk *ptk)
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{
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struct wpa_supplicant *wpa_s = ctx;
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ptksa_cache_add(wpa_s->ptksa, addr, cipher, life_time, ptk);
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}
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#endif /* CONFIG_NO_WPA */
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@ -1348,9 +1358,20 @@ int wpa_supplicant_init_wpa(struct wpa_supplicant *wpa_s)
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{
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#ifndef CONFIG_NO_WPA
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struct wpa_sm_ctx *ctx;
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wpa_s->ptksa = ptksa_cache_init();
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if (!wpa_s->ptksa) {
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wpa_printf(MSG_ERROR, "Failed to allocate PTKSA");
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return -1;
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}
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ctx = os_zalloc(sizeof(*ctx));
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if (ctx == NULL) {
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wpa_printf(MSG_ERROR, "Failed to allocate WPA context.");
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ptksa_cache_deinit(wpa_s->ptksa);
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wpa_s->ptksa = NULL;
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return -1;
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}
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@ -1394,12 +1415,15 @@ int wpa_supplicant_init_wpa(struct wpa_supplicant *wpa_s)
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ctx->fils_hlp_rx = wpa_supplicant_fils_hlp_rx;
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ctx->channel_info = wpa_supplicant_channel_info;
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ctx->transition_disable = wpa_supplicant_transition_disable;
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ctx->store_ptk = wpa_supplicant_store_ptk;
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wpa_s->wpa = wpa_sm_init(ctx);
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if (wpa_s->wpa == NULL) {
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wpa_printf(MSG_ERROR, "Failed to initialize WPA state "
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"machine");
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wpa_printf(MSG_ERROR,
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"Failed to initialize WPA state machine");
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os_free(ctx);
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ptksa_cache_deinit(wpa_s->ptksa);
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wpa_s->ptksa = NULL;
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return -1;
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}
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#endif /* CONFIG_NO_WPA */
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