Date: Thu, 19 Jul 2018 14:37:32 +0000 (UTC) From: Cy Schubert <cy@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-vendor@freebsd.org Subject: svn commit: r336486 - in vendor/wpa/dist/src: common rsn_supp Message-ID: <201807191437.w6JEbWn2064722@repo.freebsd.org>
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Author: cy Date: Thu Jul 19 14:37:32 2018 New Revision: 336486 URL: https://svnweb.freebsd.org/changeset/base/336486 Log: Import upline security patch to prevent an alreadi in use group ke. Obtained from: https://w1.fi/security/2017-1/\ rebased-v2.6-0002-Prevent-reinstallation-\ of-an-already-in-use-group-ke.patch Modified: vendor/wpa/dist/src/common/wpa_common.h vendor/wpa/dist/src/rsn_supp/wpa.c vendor/wpa/dist/src/rsn_supp/wpa_i.h Modified: vendor/wpa/dist/src/common/wpa_common.h ============================================================================== --- vendor/wpa/dist/src/common/wpa_common.h Thu Jul 19 14:35:27 2018 (r336485) +++ vendor/wpa/dist/src/common/wpa_common.h Thu Jul 19 14:37:32 2018 (r336486) @@ -217,6 +217,17 @@ struct wpa_ptk { size_t tk_len; }; +struct wpa_gtk { + u8 gtk[WPA_GTK_MAX_LEN]; + size_t gtk_len; +}; + +#ifdef CONFIG_IEEE80211W +struct wpa_igtk { + u8 igtk[WPA_IGTK_MAX_LEN]; + size_t igtk_len; +}; +#endif /* CONFIG_IEEE80211W */ /* WPA IE version 1 * 00-50-f2:1 (OUI:OUI type) Modified: vendor/wpa/dist/src/rsn_supp/wpa.c ============================================================================== --- vendor/wpa/dist/src/rsn_supp/wpa.c Thu Jul 19 14:35:27 2018 (r336485) +++ vendor/wpa/dist/src/rsn_supp/wpa.c Thu Jul 19 14:37:32 2018 (r336486) @@ -714,6 +714,15 @@ static int wpa_supplicant_install_gtk(struct wpa_sm *s const u8 *_gtk = gd->gtk; u8 gtk_buf[32]; + /* Detect possible key reinstallation */ + if (sm->gtk.gtk_len == (size_t) gd->gtk_len && + os_memcmp(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len) == 0) { + wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, + "WPA: Not reinstalling already in-use GTK to the driver (keyidx=%d tx=%d len=%d)", + gd->keyidx, gd->tx, gd->gtk_len); + return 0; + } + wpa_hexdump_key(MSG_DEBUG, "WPA: Group Key", gd->gtk, gd->gtk_len); wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: Installing GTK to the driver (keyidx=%d tx=%d len=%d)", @@ -748,6 +757,9 @@ static int wpa_supplicant_install_gtk(struct wpa_sm *s } os_memset(gtk_buf, 0, sizeof(gtk_buf)); + sm->gtk.gtk_len = gd->gtk_len; + os_memcpy(sm->gtk.gtk, gd->gtk, sm->gtk.gtk_len); + return 0; } @@ -854,6 +866,48 @@ static int wpa_supplicant_pairwise_gtk(struct wpa_sm * } +#ifdef CONFIG_IEEE80211W +static int wpa_supplicant_install_igtk(struct wpa_sm *sm, + const struct wpa_igtk_kde *igtk) +{ + size_t len = wpa_cipher_key_len(sm->mgmt_group_cipher); + u16 keyidx = WPA_GET_LE16(igtk->keyid); + + /* Detect possible key reinstallation */ + if (sm->igtk.igtk_len == len && + os_memcmp(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len) == 0) { + wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, + "WPA: Not reinstalling already in-use IGTK to the driver (keyidx=%d)", + keyidx); + return 0; + } + + wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, + "WPA: IGTK keyid %d pn %02x%02x%02x%02x%02x%02x", + keyidx, MAC2STR(igtk->pn)); + wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", igtk->igtk, len); + if (keyidx > 4095) { + wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, + "WPA: Invalid IGTK KeyID %d", keyidx); + return -1; + } + if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher), + broadcast_ether_addr, + keyidx, 0, igtk->pn, sizeof(igtk->pn), + igtk->igtk, len) < 0) { + wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, + "WPA: Failed to configure IGTK to the driver"); + return -1; + } + + sm->igtk.igtk_len = len; + os_memcpy(sm->igtk.igtk, igtk->igtk, sm->igtk.igtk_len); + + return 0; +} +#endif /* CONFIG_IEEE80211W */ + + static int ieee80211w_set_keys(struct wpa_sm *sm, struct wpa_eapol_ie_parse *ie) { @@ -864,30 +918,14 @@ static int ieee80211w_set_keys(struct wpa_sm *sm, if (ie->igtk) { size_t len; const struct wpa_igtk_kde *igtk; - u16 keyidx; + len = wpa_cipher_key_len(sm->mgmt_group_cipher); if (ie->igtk_len != WPA_IGTK_KDE_PREFIX_LEN + len) return -1; + igtk = (const struct wpa_igtk_kde *) ie->igtk; - keyidx = WPA_GET_LE16(igtk->keyid); - wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG, "WPA: IGTK keyid %d " - "pn %02x%02x%02x%02x%02x%02x", - keyidx, MAC2STR(igtk->pn)); - wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK", - igtk->igtk, len); - if (keyidx > 4095) { - wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, - "WPA: Invalid IGTK KeyID %d", keyidx); + if (wpa_supplicant_install_igtk(sm, igtk) < 0) return -1; - } - if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher), - broadcast_ether_addr, - keyidx, 0, igtk->pn, sizeof(igtk->pn), - igtk->igtk, len) < 0) { - wpa_msg(sm->ctx->msg_ctx, MSG_WARNING, - "WPA: Failed to configure IGTK to the driver"); - return -1; - } } return 0; @@ -2307,7 +2345,7 @@ void wpa_sm_deinit(struct wpa_sm *sm) */ void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 *bssid) { - int clear_ptk = 1; + int clear_keys = 1; if (sm == NULL) return; @@ -2333,11 +2371,11 @@ void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 * /* Prepare for the next transition */ wpa_ft_prepare_auth_request(sm, NULL); - clear_ptk = 0; + clear_keys = 0; } #endif /* CONFIG_IEEE80211R */ - if (clear_ptk) { + if (clear_keys) { /* * IEEE 802.11, 8.4.10: Delete PTK SA on (re)association if * this is not part of a Fast BSS Transition. @@ -2347,6 +2385,10 @@ void wpa_sm_notify_assoc(struct wpa_sm *sm, const u8 * os_memset(&sm->ptk, 0, sizeof(sm->ptk)); sm->tptk_set = 0; os_memset(&sm->tptk, 0, sizeof(sm->tptk)); + os_memset(&sm->gtk, 0, sizeof(sm->gtk)); +#ifdef CONFIG_IEEE80211W + os_memset(&sm->igtk, 0, sizeof(sm->igtk)); +#endif /* CONFIG_IEEE80211W */ } #ifdef CONFIG_TDLS @@ -2877,6 +2919,10 @@ void wpa_sm_drop_sa(struct wpa_sm *sm) os_memset(sm->pmk, 0, sizeof(sm->pmk)); os_memset(&sm->ptk, 0, sizeof(sm->ptk)); os_memset(&sm->tptk, 0, sizeof(sm->tptk)); + os_memset(&sm->gtk, 0, sizeof(sm->gtk)); +#ifdef CONFIG_IEEE80211W + os_memset(&sm->igtk, 0, sizeof(sm->igtk)); +#endif /* CONFIG_IEEE80211W */ #ifdef CONFIG_IEEE80211R os_memset(sm->xxkey, 0, sizeof(sm->xxkey)); os_memset(sm->pmk_r0, 0, sizeof(sm->pmk_r0)); @@ -2949,29 +2995,11 @@ int wpa_wnmsleep_install_key(struct wpa_sm *sm, u8 sub os_memset(&gd, 0, sizeof(gd)); #ifdef CONFIG_IEEE80211W } else if (subelem_id == WNM_SLEEP_SUBELEM_IGTK) { - struct wpa_igtk_kde igd; - u16 keyidx; + const struct wpa_igtk_kde *igtk; - os_memset(&igd, 0, sizeof(igd)); - keylen = wpa_cipher_key_len(sm->mgmt_group_cipher); - os_memcpy(igd.keyid, buf + 2, 2); - os_memcpy(igd.pn, buf + 4, 6); - - keyidx = WPA_GET_LE16(igd.keyid); - os_memcpy(igd.igtk, buf + 10, keylen); - - wpa_hexdump_key(MSG_DEBUG, "Install IGTK (WNM SLEEP)", - igd.igtk, keylen); - if (wpa_sm_set_key(sm, wpa_cipher_to_alg(sm->mgmt_group_cipher), - broadcast_ether_addr, - keyidx, 0, igd.pn, sizeof(igd.pn), - igd.igtk, keylen) < 0) { - wpa_printf(MSG_DEBUG, "Failed to install the IGTK in " - "WNM mode"); - os_memset(&igd, 0, sizeof(igd)); + igtk = (const struct wpa_igtk_kde *) (buf + 2); + if (wpa_supplicant_install_igtk(sm, igtk) < 0) return -1; - } - os_memset(&igd, 0, sizeof(igd)); #endif /* CONFIG_IEEE80211W */ } else { wpa_printf(MSG_DEBUG, "Unknown element id"); Modified: vendor/wpa/dist/src/rsn_supp/wpa_i.h ============================================================================== --- vendor/wpa/dist/src/rsn_supp/wpa_i.h Thu Jul 19 14:35:27 2018 (r336485) +++ vendor/wpa/dist/src/rsn_supp/wpa_i.h Thu Jul 19 14:37:32 2018 (r336486) @@ -31,6 +31,10 @@ struct wpa_sm { u8 rx_replay_counter[WPA_REPLAY_COUNTER_LEN]; int rx_replay_counter_set; u8 request_counter[WPA_REPLAY_COUNTER_LEN]; + struct wpa_gtk gtk; +#ifdef CONFIG_IEEE80211W + struct wpa_igtk igtk; +#endif /* CONFIG_IEEE80211W */ struct eapol_sm *eapol; /* EAPOL state machine from upper level code */
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