/* * WPA/RSN - Shared functions for supplicant and authenticator * Copyright (c) 2002-2015, Jouni Malinen * * This software may be distributed under the terms of the BSD license. * See README for more details. */ #include "includes.h" #include "common.h" #include "crypto/md5.h" #include "crypto/sha1.h" #include "crypto/sha256.h" #include "crypto/sha384.h" #include "crypto/aes_wrap.h" #include "crypto/crypto.h" #include "ieee802_11_defs.h" #include "defs.h" #include "wpa_common.h" static unsigned int wpa_kck_len(int akmp) { if (akmp == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) return 24; return 16; } static unsigned int wpa_kek_len(int akmp) { if (akmp == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) return 32; return 16; } unsigned int wpa_mic_len(int akmp) { if (akmp == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) return 24; return 16; } /** * wpa_eapol_key_mic - Calculate EAPOL-Key MIC * @key: EAPOL-Key Key Confirmation Key (KCK) * @key_len: KCK length in octets * @akmp: WPA_KEY_MGMT_* used in key derivation * @ver: Key descriptor version (WPA_KEY_INFO_TYPE_*) * @buf: Pointer to the beginning of the EAPOL header (version field) * @len: Length of the EAPOL frame (from EAPOL header to the end of the frame) * @mic: Pointer to the buffer to which the EAPOL-Key MIC is written * Returns: 0 on success, -1 on failure * * Calculate EAPOL-Key MIC for an EAPOL-Key packet. The EAPOL-Key MIC field has * to be cleared (all zeroes) when calling this function. * * Note: 'IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames' has an error in the * description of the Key MIC calculation. It includes packet data from the * beginning of the EAPOL-Key header, not EAPOL header. This incorrect change * happened during final editing of the standard and the correct behavior is * defined in the last draft (IEEE 802.11i/D10). */ int wpa_eapol_key_mic(const u8 *key, size_t key_len, int akmp, int ver, const u8 *buf, size_t len, u8 *mic) { u8 hash[SHA384_MAC_LEN]; switch (ver) { #ifndef CONFIG_FIPS case WPA_KEY_INFO_TYPE_HMAC_MD5_RC4: return hmac_md5(key, key_len, buf, len, mic); #endif /* CONFIG_FIPS */ case WPA_KEY_INFO_TYPE_HMAC_SHA1_AES: if (hmac_sha1(key, key_len, buf, len, hash)) return -1; os_memcpy(mic, hash, MD5_MAC_LEN); break; #if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W) case WPA_KEY_INFO_TYPE_AES_128_CMAC: return omac1_aes_128(key, buf, len, mic); #endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */ case WPA_KEY_INFO_TYPE_AKM_DEFINED: switch (akmp) { #ifdef CONFIG_HS20 case WPA_KEY_MGMT_OSEN: return omac1_aes_128(key, buf, len, mic); #endif /* CONFIG_HS20 */ #ifdef CONFIG_SUITEB case WPA_KEY_MGMT_IEEE8021X_SUITE_B: if (hmac_sha256(key, key_len, buf, len, hash)) return -1; os_memcpy(mic, hash, MD5_MAC_LEN); break; #endif /* CONFIG_SUITEB */ #ifdef CONFIG_SUITEB192 case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: if (hmac_sha384(key, key_len, buf, len, hash)) return -1; os_memcpy(mic, hash, 24); break; #endif /* CONFIG_SUITEB192 */ default: return -1; } break; default: return -1; } return 0; } /** * wpa_pmk_to_ptk - Calculate PTK from PMK, addresses, and nonces * @pmk: Pairwise master key * @pmk_len: Length of PMK * @label: Label to use in derivation * @addr1: AA or SA * @addr2: SA or AA * @nonce1: ANonce or SNonce * @nonce2: SNonce or ANonce * @ptk: Buffer for pairwise transient key * @akmp: Negotiated AKM * @cipher: Negotiated pairwise cipher * Returns: 0 on success, -1 on failure * * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy * PTK = PRF-X(PMK, "Pairwise key expansion", * Min(AA, SA) || Max(AA, SA) || * Min(ANonce, SNonce) || Max(ANonce, SNonce)) * * STK = PRF-X(SMK, "Peer key expansion", * Min(MAC_I, MAC_P) || Max(MAC_I, MAC_P) || * Min(INonce, PNonce) || Max(INonce, PNonce)) */ int wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const char *label, const u8 *addr1, const u8 *addr2, const u8 *nonce1, const u8 *nonce2, struct wpa_ptk *ptk, int akmp, int cipher) { u8 data[2 * ETH_ALEN + 2 * WPA_NONCE_LEN]; u8 tmp[WPA_KCK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN]; size_t ptk_len; if (os_memcmp(addr1, addr2, ETH_ALEN) < 0) { os_memcpy(data, addr1, ETH_ALEN); os_memcpy(data + ETH_ALEN, addr2, ETH_ALEN); } else { os_memcpy(data, addr2, ETH_ALEN); os_memcpy(data + ETH_ALEN, addr1, ETH_ALEN); } if (os_memcmp(nonce1, nonce2, WPA_NONCE_LEN) < 0) { os_memcpy(data + 2 * ETH_ALEN, nonce1, WPA_NONCE_LEN); os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce2, WPA_NONCE_LEN); } else { os_memcpy(data + 2 * ETH_ALEN, nonce2, WPA_NONCE_LEN); os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce1, WPA_NONCE_LEN); } ptk->kck_len = wpa_kck_len(akmp); ptk->kek_len = wpa_kek_len(akmp); ptk->tk_len = wpa_cipher_key_len(cipher); ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len; #ifdef CONFIG_SUITEB192 if (wpa_key_mgmt_sha384(akmp)) sha384_prf(pmk, pmk_len, label, data, sizeof(data), tmp, ptk_len); else #endif /* CONFIG_SUITEB192 */ #ifdef CONFIG_IEEE80211W if (wpa_key_mgmt_sha256(akmp)) sha256_prf(pmk, pmk_len, label, data, sizeof(data), tmp, ptk_len); else #endif /* CONFIG_IEEE80211W */ sha1_prf(pmk, pmk_len, label, data, sizeof(data), tmp, ptk_len); wpa_printf(MSG_DEBUG, "WPA: PTK derivation - A1=" MACSTR " A2=" MACSTR, MAC2STR(addr1), MAC2STR(addr2)); wpa_hexdump(MSG_DEBUG, "WPA: Nonce1", nonce1, WPA_NONCE_LEN); wpa_hexdump(MSG_DEBUG, "WPA: Nonce2", nonce2, WPA_NONCE_LEN); wpa_hexdump_key(MSG_DEBUG, "WPA: PMK", pmk, pmk_len); wpa_hexdump_key(MSG_DEBUG, "WPA: PTK", tmp, ptk_len); os_memcpy(ptk->kck, tmp, ptk->kck_len); wpa_hexdump_key(MSG_DEBUG, "WPA: KCK", ptk->kck, ptk->kck_len); os_memcpy(ptk->kek, tmp + ptk->kck_len, ptk->kek_len); wpa_hexdump_key(MSG_DEBUG, "WPA: KEK", ptk->kek, ptk->kek_len); os_memcpy(ptk->tk, tmp + ptk->kck_len + ptk->kek_len, ptk->tk_len); wpa_hexdump_key(MSG_DEBUG, "WPA: TK", ptk->tk, ptk->tk_len); os_memset(tmp, 0, sizeof(tmp)); return 0; } #ifdef CONFIG_IEEE80211R int wpa_ft_mic(const u8 *kck, size_t kck_len, const u8 *sta_addr, const u8 *ap_addr, u8 transaction_seqnum, const u8 *mdie, size_t mdie_len, const u8 *ftie, size_t ftie_len, const u8 *rsnie, size_t rsnie_len, const u8 *ric, size_t ric_len, u8 *mic) { const u8 *addr[9]; size_t len[9]; size_t i, num_elem = 0; u8 zero_mic[16]; if (kck_len != 16) { wpa_printf(MSG_WARNING, "FT: Unsupported KCK length %u", (unsigned int) kck_len); return -1; } addr[num_elem] = sta_addr; len[num_elem] = ETH_ALEN; num_elem++; addr[num_elem] = ap_addr; len[num_elem] = ETH_ALEN; num_elem++; addr[num_elem] = &transaction_seqnum; len[num_elem] = 1; num_elem++; if (rsnie) { addr[num_elem] = rsnie; len[num_elem] = rsnie_len; num_elem++; } if (mdie) { addr[num_elem] = mdie; len[num_elem] = mdie_len; num_elem++; } if (ftie) { if (ftie_len < 2 + sizeof(struct rsn_ftie)) return -1; /* IE hdr and mic_control */ addr[num_elem] = ftie; len[num_elem] = 2 + 2; num_elem++; /* MIC field with all zeros */ os_memset(zero_mic, 0, sizeof(zero_mic)); addr[num_elem] = zero_mic; len[num_elem] = sizeof(zero_mic); num_elem++; /* Rest of FTIE */ addr[num_elem] = ftie + 2 + 2 + 16; len[num_elem] = ftie_len - (2 + 2 + 16); num_elem++; } if (ric) { addr[num_elem] = ric; len[num_elem] = ric_len; num_elem++; } for (i = 0; i < num_elem; i++) wpa_hexdump(MSG_MSGDUMP, "FT: MIC data", addr[i], len[i]); if (omac1_aes_128_vector(kck, num_elem, addr, len, mic)) return -1; return 0; } static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len, struct wpa_ft_ies *parse) { const u8 *end, *pos; parse->ftie = ie; parse->ftie_len = ie_len; pos = ie + sizeof(struct rsn_ftie); end = ie + ie_len; while (pos + 2 <= end && pos + 2 + pos[1] <= end) { switch (pos[0]) { case FTIE_SUBELEM_R1KH_ID: if (pos[1] != FT_R1KH_ID_LEN) { wpa_printf(MSG_DEBUG, "FT: Invalid R1KH-ID " "length in FTIE: %d", pos[1]); return -1; } parse->r1kh_id = pos + 2; break; case FTIE_SUBELEM_GTK: parse->gtk = pos + 2; parse->gtk_len = pos[1]; break; case FTIE_SUBELEM_R0KH_ID: if (pos[1] < 1 || pos[1] > FT_R0KH_ID_MAX_LEN) { wpa_printf(MSG_DEBUG, "FT: Invalid R0KH-ID " "length in FTIE: %d", pos[1]); return -1; } parse->r0kh_id = pos + 2; parse->r0kh_id_len = pos[1]; break; #ifdef CONFIG_IEEE80211W case FTIE_SUBELEM_IGTK: parse->igtk = pos + 2; parse->igtk_len = pos[1]; break; #endif /* CONFIG_IEEE80211W */ } pos += 2 + pos[1]; } return 0; } int wpa_ft_parse_ies(const u8 *ies, size_t ies_len, struct wpa_ft_ies *parse) { const u8 *end, *pos; struct wpa_ie_data data; int ret; const struct rsn_ftie *ftie; int prot_ie_count = 0; os_memset(parse, 0, sizeof(*parse)); if (ies == NULL) return 0; pos = ies; end = ies + ies_len; while (pos + 2 <= end && pos + 2 + pos[1] <= end) { switch (pos[0]) { case WLAN_EID_RSN: parse->rsn = pos + 2; parse->rsn_len = pos[1]; ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2, parse->rsn_len + 2, &data); if (ret < 0) { wpa_printf(MSG_DEBUG, "FT: Failed to parse " "RSN IE: %d", ret); return -1; } if (data.num_pmkid == 1 && data.pmkid) parse->rsn_pmkid = data.pmkid; break; case WLAN_EID_MOBILITY_DOMAIN: if (pos[1] < sizeof(struct rsn_mdie)) return -1; parse->mdie = pos + 2; parse->mdie_len = pos[1]; break; case WLAN_EID_FAST_BSS_TRANSITION: if (pos[1] < sizeof(*ftie)) return -1; ftie = (const struct rsn_ftie *) (pos + 2); prot_ie_count = ftie->mic_control[1]; if (wpa_ft_parse_ftie(pos + 2, pos[1], parse) < 0) return -1; break; case WLAN_EID_TIMEOUT_INTERVAL: if (pos[1] != 5) break; parse->tie = pos + 2; parse->tie_len = pos[1]; break; case WLAN_EID_RIC_DATA: if (parse->ric == NULL) parse->ric = pos; break; } pos += 2 + pos[1]; } if (prot_ie_count == 0) return 0; /* no MIC */ /* * Check that the protected IE count matches with IEs included in the * frame. */ if (parse->rsn) prot_ie_count--; if (parse->mdie) prot_ie_count--; if (parse->ftie) prot_ie_count--; if (prot_ie_count < 0) { wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in " "the protected IE count"); return -1; } if (prot_ie_count == 0 && parse->ric) { wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not " "included in protected IE count"); return -1; } /* Determine the end of the RIC IE(s) */ pos = parse->ric; while (pos && pos + 2 <= end && pos + 2 + pos[1] <= end && prot_ie_count) { prot_ie_count--; pos += 2 + pos[1]; } parse->ric_len = pos - parse->ric; if (prot_ie_count) { wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from " "frame", (int) prot_ie_count); return -1; } return 0; } #endif /* CONFIG_IEEE80211R */ static int rsn_selector_to_bitfield(const u8 *s) { if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NONE) return WPA_CIPHER_NONE; if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_TKIP) return WPA_CIPHER_TKIP; if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP) return WPA_CIPHER_CCMP; #ifdef CONFIG_IEEE80211W if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_AES_128_CMAC) return WPA_CIPHER_AES_128_CMAC; #endif /* CONFIG_IEEE80211W */ if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP) return WPA_CIPHER_GCMP; if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP_256) return WPA_CIPHER_CCMP_256; if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP_256) return WPA_CIPHER_GCMP_256; if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_128) return WPA_CIPHER_BIP_GMAC_128; if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_256) return WPA_CIPHER_BIP_GMAC_256; if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_CMAC_256) return WPA_CIPHER_BIP_CMAC_256; if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED) return WPA_CIPHER_GTK_NOT_USED; return 0; } static int rsn_key_mgmt_to_bitfield(const u8 *s) { if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_UNSPEC_802_1X) return WPA_KEY_MGMT_IEEE8021X; if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X) return WPA_KEY_MGMT_PSK; #ifdef CONFIG_IEEE80211R if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X) return WPA_KEY_MGMT_FT_IEEE8021X; if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_PSK) return WPA_KEY_MGMT_FT_PSK; #endif /* CONFIG_IEEE80211R */ #ifdef CONFIG_IEEE80211W if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SHA256) return WPA_KEY_MGMT_IEEE8021X_SHA256; if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_SHA256) return WPA_KEY_MGMT_PSK_SHA256; #endif /* CONFIG_IEEE80211W */ #ifdef CONFIG_SAE if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_SAE) return WPA_KEY_MGMT_SAE; if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_SAE) return WPA_KEY_MGMT_FT_SAE; #endif /* CONFIG_SAE */ if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SUITE_B) return WPA_KEY_MGMT_IEEE8021X_SUITE_B; if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192) return WPA_KEY_MGMT_IEEE8021X_SUITE_B_192; if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_OSEN) return WPA_KEY_MGMT_OSEN; return 0; } int wpa_cipher_valid_group(int cipher) { return wpa_cipher_valid_pairwise(cipher) || cipher == WPA_CIPHER_GTK_NOT_USED; } #ifdef CONFIG_IEEE80211W int wpa_cipher_valid_mgmt_group(int cipher) { return cipher == WPA_CIPHER_AES_128_CMAC || cipher == WPA_CIPHER_BIP_GMAC_128 || cipher == WPA_CIPHER_BIP_GMAC_256 || cipher == WPA_CIPHER_BIP_CMAC_256; } #endif /* CONFIG_IEEE80211W */ /** * wpa_parse_wpa_ie_rsn - Parse RSN IE * @rsn_ie: Buffer containing RSN IE * @rsn_ie_len: RSN IE buffer length (including IE number and length octets) * @data: Pointer to structure that will be filled in with parsed data * Returns: 0 on success, <0 on failure */ int wpa_parse_wpa_ie_rsn(const u8 *rsn_ie, size_t rsn_ie_len, struct wpa_ie_data *data) { const u8 *pos; int left; int i, count; os_memset(data, 0, sizeof(*data)); data->proto = WPA_PROTO_RSN; data->pairwise_cipher = WPA_CIPHER_CCMP; data->group_cipher = WPA_CIPHER_CCMP; data->key_mgmt = WPA_KEY_MGMT_IEEE8021X; data->capabilities = 0; data->pmkid = NULL; data->num_pmkid = 0; #ifdef CONFIG_IEEE80211W data->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC; #else /* CONFIG_IEEE80211W */ data->mgmt_group_cipher = 0; #endif /* CONFIG_IEEE80211W */ if (rsn_ie_len == 0) { /* No RSN IE - fail silently */ return -1; } if (rsn_ie_len < sizeof(struct rsn_ie_hdr)) { wpa_printf(MSG_DEBUG, "%s: ie len too short %lu", __func__, (unsigned long) rsn_ie_len); return -1; } if (rsn_ie_len >= 6 && rsn_ie[1] >= 4 && rsn_ie[1] == rsn_ie_len - 2 && WPA_GET_BE32(&rsn_ie[2]) == OSEN_IE_VENDOR_TYPE) { pos = rsn_ie + 6; left = rsn_ie_len - 6; data->proto = WPA_PROTO_OSEN; } else { const struct rsn_ie_hdr *hdr; hdr = (const struct rsn_ie_hdr *) rsn_ie; if (hdr->elem_id != WLAN_EID_RSN || hdr->len != rsn_ie_len - 2 || WPA_GET_LE16(hdr->version) != RSN_VERSION) { wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version", __func__); return -2; } pos = (const u8 *) (hdr + 1); left = rsn_ie_len - sizeof(*hdr); } if (left >= RSN_SELECTOR_LEN) { data->group_cipher = rsn_selector_to_bitfield(pos); if (!wpa_cipher_valid_group(data->group_cipher)) { wpa_printf(MSG_DEBUG, "%s: invalid group cipher 0x%x", __func__, data->group_cipher); return -1; } pos += RSN_SELECTOR_LEN; left -= RSN_SELECTOR_LEN; } else if (left > 0) { wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much", __func__, left); return -3; } if (left >= 2) { data->pairwise_cipher = 0; count = WPA_GET_LE16(pos); pos += 2; left -= 2; if (count == 0 || count > left / RSN_SELECTOR_LEN) { wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), " "count %u left %u", __func__, count, left); return -4; } for (i = 0; i < count; i++) { data->pairwise_cipher |= rsn_selector_to_bitfield(pos); pos += RSN_SELECTOR_LEN; left -= RSN_SELECTOR_LEN; } #ifdef CONFIG_IEEE80211W if (data->pairwise_cipher & WPA_CIPHER_AES_128_CMAC) { wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as " "pairwise cipher", __func__); return -1; } #endif /* CONFIG_IEEE80211W */ } else if (left == 1) { wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)", __func__); return -5; } if (left >= 2) { data->key_mgmt = 0; count = WPA_GET_LE16(pos); pos += 2; left -= 2; if (count == 0 || count > left / RSN_SELECTOR_LEN) { wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), " "count %u left %u", __func__, count, left); return -6; } for (i = 0; i < count; i++) { data->key_mgmt |= rsn_key_mgmt_to_bitfield(pos); pos += RSN_SELECTOR_LEN; left -= RSN_SELECTOR_LEN; } } else if (left == 1) { wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)", __func__); return -7; } if (left >= 2) { data->capabilities = WPA_GET_LE16(pos); pos += 2; left -= 2; } if (left >= 2) { u16 num_pmkid = WPA_GET_LE16(pos); pos += 2; left -= 2; if (num_pmkid > (unsigned int) left / PMKID_LEN) { wpa_printf(MSG_DEBUG, "%s: PMKID underflow " "(num_pmkid=%u left=%d)", __func__, num_pmkid, left); data->num_pmkid = 0; return -9; } else { data->num_pmkid = num_pmkid; data->pmkid = pos; pos += data->num_pmkid * PMKID_LEN; left -= data->num_pmkid * PMKID_LEN; } } #ifdef CONFIG_IEEE80211W if (left >= 4) { data->mgmt_group_cipher = rsn_selector_to_bitfield(pos); if (!wpa_cipher_valid_mgmt_group(data->mgmt_group_cipher)) { wpa_printf(MSG_DEBUG, "%s: Unsupported management " "group cipher 0x%x", __func__, data->mgmt_group_cipher); return -10; } pos += RSN_SELECTOR_LEN; left -= RSN_SELECTOR_LEN; } #endif /* CONFIG_IEEE80211W */ if (left > 0) { wpa_hexdump(MSG_DEBUG, "wpa_parse_wpa_ie_rsn: ignore trailing bytes", pos, left); } return 0; } static int wpa_selector_to_bitfield(const u8 *s) { if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_NONE) return WPA_CIPHER_NONE; if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_TKIP) return WPA_CIPHER_TKIP; if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_CCMP) return WPA_CIPHER_CCMP; return 0; } static int wpa_key_mgmt_to_bitfield(const u8 *s) { if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_UNSPEC_802_1X) return WPA_KEY_MGMT_IEEE8021X; if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X) return WPA_KEY_MGMT_PSK; if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_NONE) return WPA_KEY_MGMT_WPA_NONE; return 0; } int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len, struct wpa_ie_data *data) { const struct wpa_ie_hdr *hdr; const u8 *pos; int left; int i, count; os_memset(data, 0, sizeof(*data)); data->proto = WPA_PROTO_WPA; data->pairwise_cipher = WPA_CIPHER_TKIP; data->group_cipher = WPA_CIPHER_TKIP; data->key_mgmt = WPA_KEY_MGMT_IEEE8021X; data->capabilities = 0; data->pmkid = NULL; data->num_pmkid = 0; data->mgmt_group_cipher = 0; if (wpa_ie_len < sizeof(struct wpa_ie_hdr)) { wpa_printf(MSG_DEBUG, "%s: ie len too short %lu", __func__, (unsigned long) wpa_ie_len); return -1; } hdr = (const struct wpa_ie_hdr *) wpa_ie; if (hdr->elem_id != WLAN_EID_VENDOR_SPECIFIC || hdr->len != wpa_ie_len - 2 || RSN_SELECTOR_GET(hdr->oui) != WPA_OUI_TYPE || WPA_GET_LE16(hdr->version) != WPA_VERSION) { wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version", __func__); return -2; } pos = (const u8 *) (hdr + 1); left = wpa_ie_len - sizeof(*hdr); if (left >= WPA_SELECTOR_LEN) { data->group_cipher = wpa_selector_to_bitfield(pos); pos += WPA_SELECTOR_LEN; left -= WPA_SELECTOR_LEN; } else if (left > 0) { wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much", __func__, left); return -3; } if (left >= 2) { data->pairwise_cipher = 0; count = WPA_GET_LE16(pos); pos += 2; left -= 2; if (count == 0 || count > left / WPA_SELECTOR_LEN) { wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), " "count %u left %u", __func__, count, left); return -4; } for (i = 0; i < count; i++) { data->pairwise_cipher |= wpa_selector_to_bitfield(pos); pos += WPA_SELECTOR_LEN; left -= WPA_SELECTOR_LEN; } } else if (left == 1) { wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)", __func__); return -5; } if (left >= 2) { data->key_mgmt = 0; count = WPA_GET_LE16(pos); pos += 2; left -= 2; if (count == 0 || count > left / WPA_SELECTOR_LEN) { wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), " "count %u left %u", __func__, count, left); return -6; } for (i = 0; i < count; i++) { data->key_mgmt |= wpa_key_mgmt_to_bitfield(pos); pos += WPA_SELECTOR_LEN; left -= WPA_SELECTOR_LEN; } } else if (left == 1) { wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)", __func__); return -7; } if (left >= 2) { data->capabilities = WPA_GET_LE16(pos); pos += 2; left -= 2; } if (left > 0) { wpa_hexdump(MSG_DEBUG, "wpa_parse_wpa_ie_wpa: ignore trailing bytes", pos, left); } return 0; } #ifdef CONFIG_IEEE80211R /** * wpa_derive_pmk_r0 - Derive PMK-R0 and PMKR0Name * * IEEE Std 802.11r-2008 - 8.5.1.5.3 */ void wpa_derive_pmk_r0(const u8 *xxkey, size_t xxkey_len, const u8 *ssid, size_t ssid_len, const u8 *mdid, const u8 *r0kh_id, size_t r0kh_id_len, const u8 *s0kh_id, u8 *pmk_r0, u8 *pmk_r0_name) { u8 buf[1 + SSID_MAX_LEN + MOBILITY_DOMAIN_ID_LEN + 1 + FT_R0KH_ID_MAX_LEN + ETH_ALEN]; u8 *pos, r0_key_data[48], hash[32]; const u8 *addr[2]; size_t len[2]; /* * R0-Key-Data = KDF-384(XXKey, "FT-R0", * SSIDlength || SSID || MDID || R0KHlength || * R0KH-ID || S0KH-ID) * XXKey is either the second 256 bits of MSK or PSK. * PMK-R0 = L(R0-Key-Data, 0, 256) * PMK-R0Name-Salt = L(R0-Key-Data, 256, 128) */ if (ssid_len > SSID_MAX_LEN || r0kh_id_len > FT_R0KH_ID_MAX_LEN) return; pos = buf; *pos++ = ssid_len; os_memcpy(pos, ssid, ssid_len); pos += ssid_len; os_memcpy(pos, mdid, MOBILITY_DOMAIN_ID_LEN); pos += MOBILITY_DOMAIN_ID_LEN; *pos++ = r0kh_id_len; os_memcpy(pos, r0kh_id, r0kh_id_len); pos += r0kh_id_len; os_memcpy(pos, s0kh_id, ETH_ALEN); pos += ETH_ALEN; sha256_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf, r0_key_data, sizeof(r0_key_data)); os_memcpy(pmk_r0, r0_key_data, PMK_LEN); /* * PMKR0Name = Truncate-128(SHA-256("FT-R0N" || PMK-R0Name-Salt) */ addr[0] = (const u8 *) "FT-R0N"; len[0] = 6; addr[1] = r0_key_data + PMK_LEN; len[1] = 16; sha256_vector(2, addr, len, hash); os_memcpy(pmk_r0_name, hash, WPA_PMK_NAME_LEN); } /** * wpa_derive_pmk_r1_name - Derive PMKR1Name * * IEEE Std 802.11r-2008 - 8.5.1.5.4 */ void wpa_derive_pmk_r1_name(const u8 *pmk_r0_name, const u8 *r1kh_id, const u8 *s1kh_id, u8 *pmk_r1_name) { u8 hash[32]; const u8 *addr[4]; size_t len[4]; /* * PMKR1Name = Truncate-128(SHA-256("FT-R1N" || PMKR0Name || * R1KH-ID || S1KH-ID)) */ addr[0] = (const u8 *) "FT-R1N"; len[0] = 6; addr[1] = pmk_r0_name; len[1] = WPA_PMK_NAME_LEN; addr[2] = r1kh_id; len[2] = FT_R1KH_ID_LEN; addr[3] = s1kh_id; len[3] = ETH_ALEN; sha256_vector(4, addr, len, hash); os_memcpy(pmk_r1_name, hash, WPA_PMK_NAME_LEN); } /** * wpa_derive_pmk_r1 - Derive PMK-R1 and PMKR1Name from PMK-R0 * * IEEE Std 802.11r-2008 - 8.5.1.5.4 */ void wpa_derive_pmk_r1(const u8 *pmk_r0, const u8 *pmk_r0_name, const u8 *r1kh_id, const u8 *s1kh_id, u8 *pmk_r1, u8 *pmk_r1_name) { u8 buf[FT_R1KH_ID_LEN + ETH_ALEN]; u8 *pos; /* PMK-R1 = KDF-256(PMK-R0, "FT-R1", R1KH-ID || S1KH-ID) */ pos = buf; os_memcpy(pos, r1kh_id, FT_R1KH_ID_LEN); pos += FT_R1KH_ID_LEN; os_memcpy(pos, s1kh_id, ETH_ALEN); pos += ETH_ALEN; sha256_prf(pmk_r0, PMK_LEN, "FT-R1", buf, pos - buf, pmk_r1, PMK_LEN); wpa_derive_pmk_r1_name(pmk_r0_name, r1kh_id, s1kh_id, pmk_r1_name); } /** * wpa_pmk_r1_to_ptk - Derive PTK and PTKName from PMK-R1 * * IEEE Std 802.11r-2008 - 8.5.1.5.5 */ int wpa_pmk_r1_to_ptk(const u8 *pmk_r1, const u8 *snonce, const u8 *anonce, const u8 *sta_addr, const u8 *bssid, const u8 *pmk_r1_name, struct wpa_ptk *ptk, u8 *ptk_name, int akmp, int cipher) { u8 buf[2 * WPA_NONCE_LEN + 2 * ETH_ALEN]; u8 *pos, hash[32]; const u8 *addr[6]; size_t len[6]; u8 tmp[WPA_KCK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN]; size_t ptk_len; /* * PTK = KDF-PTKLen(PMK-R1, "FT-PTK", SNonce || ANonce || * BSSID || STA-ADDR) */ pos = buf; os_memcpy(pos, snonce, WPA_NONCE_LEN); pos += WPA_NONCE_LEN; os_memcpy(pos, anonce, WPA_NONCE_LEN); pos += WPA_NONCE_LEN; os_memcpy(pos, bssid, ETH_ALEN); pos += ETH_ALEN; os_memcpy(pos, sta_addr, ETH_ALEN); pos += ETH_ALEN; ptk->kck_len = wpa_kck_len(akmp); ptk->kek_len = wpa_kek_len(akmp); ptk->tk_len = wpa_cipher_key_len(cipher); ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len; sha256_prf(pmk_r1, PMK_LEN, "FT-PTK", buf, pos - buf, tmp, ptk_len); /* * PTKName = Truncate-128(SHA-256(PMKR1Name || "FT-PTKN" || SNonce || * ANonce || BSSID || STA-ADDR)) */ addr[0] = pmk_r1_name; len[0] = WPA_PMK_NAME_LEN; addr[1] = (const u8 *) "FT-PTKN"; len[1] = 7; addr[2] = snonce; len[2] = WPA_NONCE_LEN; addr[3] = anonce; len[3] = WPA_NONCE_LEN; addr[4] = bssid; len[4] = ETH_ALEN; addr[5] = sta_addr; len[5] = ETH_ALEN; sha256_vector(6, addr, len, hash); os_memcpy(ptk_name, hash, WPA_PMK_NAME_LEN); os_memcpy(ptk->kck, tmp, ptk->kck_len); os_memcpy(ptk->kek, tmp + ptk->kck_len, ptk->kek_len); os_memcpy(ptk->tk, tmp + ptk->kck_len + ptk->kek_len, ptk->tk_len); wpa_hexdump_key(MSG_DEBUG, "FT: KCK", ptk->kck, ptk->kck_len); wpa_hexdump_key(MSG_DEBUG, "FT: KEK", ptk->kek, ptk->kek_len); wpa_hexdump_key(MSG_DEBUG, "FT: TK", ptk->tk, ptk->tk_len); wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN); os_memset(tmp, 0, sizeof(tmp)); return 0; } #endif /* CONFIG_IEEE80211R */ /** * rsn_pmkid - Calculate PMK identifier * @pmk: Pairwise master key * @pmk_len: Length of pmk in bytes * @aa: Authenticator address * @spa: Supplicant address * @pmkid: Buffer for PMKID * @use_sha256: Whether to use SHA256-based KDF * * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy * PMKID = HMAC-SHA1-128(PMK, "PMK Name" || AA || SPA) */ void rsn_pmkid(const u8 *pmk, size_t pmk_len, const u8 *aa, const u8 *spa, u8 *pmkid, int use_sha256) { char *title = "PMK Name"; const u8 *addr[3]; const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN }; unsigned char hash[SHA256_MAC_LEN]; addr[0] = (u8 *) title; addr[1] = aa; addr[2] = spa; #ifdef CONFIG_IEEE80211W if (use_sha256) hmac_sha256_vector(pmk, pmk_len, 3, addr, len, hash); else #endif /* CONFIG_IEEE80211W */ hmac_sha1_vector(pmk, pmk_len, 3, addr, len, hash); os_memcpy(pmkid, hash, PMKID_LEN); } #ifdef CONFIG_SUITEB /** * rsn_pmkid_suite_b - Calculate PMK identifier for Suite B AKM * @kck: Key confirmation key * @kck_len: Length of kck in bytes * @aa: Authenticator address * @spa: Supplicant address * @pmkid: Buffer for PMKID * Returns: 0 on success, -1 on failure * * IEEE Std 802.11ac-2013 - 11.6.1.3 Pairwise key hierarchy * PMKID = Truncate(HMAC-SHA-256(KCK, "PMK Name" || AA || SPA)) */ int rsn_pmkid_suite_b(const u8 *kck, size_t kck_len, const u8 *aa, const u8 *spa, u8 *pmkid) { char *title = "PMK Name"; const u8 *addr[3]; const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN }; unsigned char hash[SHA256_MAC_LEN]; addr[0] = (u8 *) title; addr[1] = aa; addr[2] = spa; if (hmac_sha256_vector(kck, kck_len, 3, addr, len, hash) < 0) return -1; os_memcpy(pmkid, hash, PMKID_LEN); return 0; } #endif /* CONFIG_SUITEB */ #ifdef CONFIG_SUITEB192 /** * rsn_pmkid_suite_b_192 - Calculate PMK identifier for Suite B AKM * @kck: Key confirmation key * @kck_len: Length of kck in bytes * @aa: Authenticator address * @spa: Supplicant address * @pmkid: Buffer for PMKID * Returns: 0 on success, -1 on failure * * IEEE Std 802.11ac-2013 - 11.6.1.3 Pairwise key hierarchy * PMKID = Truncate(HMAC-SHA-384(KCK, "PMK Name" || AA || SPA)) */ int rsn_pmkid_suite_b_192(const u8 *kck, size_t kck_len, const u8 *aa, const u8 *spa, u8 *pmkid) { char *title = "PMK Name"; const u8 *addr[3]; const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN }; unsigned char hash[SHA384_MAC_LEN]; addr[0] = (u8 *) title; addr[1] = aa; addr[2] = spa; if (hmac_sha384_vector(kck, kck_len, 3, addr, len, hash) < 0) return -1; os_memcpy(pmkid, hash, PMKID_LEN); return 0; } #endif /* CONFIG_SUITEB192 */ /** * wpa_cipher_txt - Convert cipher suite to a text string * @cipher: Cipher suite (WPA_CIPHER_* enum) * Returns: Pointer to a text string of the cipher suite name */ const char * wpa_cipher_txt(int cipher) { switch (cipher) { case WPA_CIPHER_NONE: return "NONE"; case WPA_CIPHER_WEP40: return "WEP-40"; case WPA_CIPHER_WEP104: return "WEP-104"; case WPA_CIPHER_TKIP: return "TKIP"; case WPA_CIPHER_CCMP: return "CCMP"; case WPA_CIPHER_CCMP | WPA_CIPHER_TKIP: return "CCMP+TKIP"; case WPA_CIPHER_GCMP: return "GCMP"; case WPA_CIPHER_GCMP_256: return "GCMP-256"; case WPA_CIPHER_CCMP_256: return "CCMP-256"; case WPA_CIPHER_GTK_NOT_USED: return "GTK_NOT_USED"; default: return "UNKNOWN"; } } /** * wpa_key_mgmt_txt - Convert key management suite to a text string * @key_mgmt: Key management suite (WPA_KEY_MGMT_* enum) * @proto: WPA/WPA2 version (WPA_PROTO_*) * Returns: Pointer to a text string of the key management suite name */ const char * wpa_key_mgmt_txt(int key_mgmt, int proto) { switch (key_mgmt) { case WPA_KEY_MGMT_IEEE8021X: if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA)) return "WPA2+WPA/IEEE 802.1X/EAP"; return proto == WPA_PROTO_RSN ? "WPA2/IEEE 802.1X/EAP" : "WPA/IEEE 802.1X/EAP"; case WPA_KEY_MGMT_PSK: if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA)) return "WPA2-PSK+WPA-PSK"; return proto == WPA_PROTO_RSN ? "WPA2-PSK" : "WPA-PSK"; case WPA_KEY_MGMT_NONE: return "NONE"; case WPA_KEY_MGMT_IEEE8021X_NO_WPA: return "IEEE 802.1X (no WPA)"; #ifdef CONFIG_IEEE80211R case WPA_KEY_MGMT_FT_IEEE8021X: return "FT-EAP"; case WPA_KEY_MGMT_FT_PSK: return "FT-PSK"; #endif /* CONFIG_IEEE80211R */ #ifdef CONFIG_IEEE80211W case WPA_KEY_MGMT_IEEE8021X_SHA256: return "WPA2-EAP-SHA256"; case WPA_KEY_MGMT_PSK_SHA256: return "WPA2-PSK-SHA256"; #endif /* CONFIG_IEEE80211W */ case WPA_KEY_MGMT_WPS: return "WPS"; case WPA_KEY_MGMT_SAE: return "SAE"; case WPA_KEY_MGMT_FT_SAE: return "FT-SAE"; case WPA_KEY_MGMT_OSEN: return "OSEN"; case WPA_KEY_MGMT_IEEE8021X_SUITE_B: return "WPA2-EAP-SUITE-B"; case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: return "WPA2-EAP-SUITE-B-192"; default: return "UNKNOWN"; } } u32 wpa_akm_to_suite(int akm) { if (akm & WPA_KEY_MGMT_FT_IEEE8021X) return WLAN_AKM_SUITE_FT_8021X; if (akm & WPA_KEY_MGMT_FT_PSK) return WLAN_AKM_SUITE_FT_PSK; if (akm & WPA_KEY_MGMT_IEEE8021X) return WLAN_AKM_SUITE_8021X; if (akm & WPA_KEY_MGMT_IEEE8021X_SHA256) return WLAN_AKM_SUITE_8021X_SHA256; if (akm & WPA_KEY_MGMT_IEEE8021X) return WLAN_AKM_SUITE_8021X; if (akm & WPA_KEY_MGMT_PSK_SHA256) return WLAN_AKM_SUITE_PSK_SHA256; if (akm & WPA_KEY_MGMT_PSK) return WLAN_AKM_SUITE_PSK; if (akm & WPA_KEY_MGMT_CCKM) return WLAN_AKM_SUITE_CCKM; if (akm & WPA_KEY_MGMT_OSEN) return WLAN_AKM_SUITE_OSEN; if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B) return WLAN_AKM_SUITE_8021X_SUITE_B; if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) return WLAN_AKM_SUITE_8021X_SUITE_B_192; return 0; } int wpa_compare_rsn_ie(int ft_initial_assoc, const u8 *ie1, size_t ie1len, const u8 *ie2, size_t ie2len) { if (ie1 == NULL || ie2 == NULL) return -1; if (ie1len == ie2len && os_memcmp(ie1, ie2, ie1len) == 0) return 0; /* identical IEs */ #ifdef CONFIG_IEEE80211R if (ft_initial_assoc) { struct wpa_ie_data ie1d, ie2d; /* * The PMKID-List in RSN IE is different between Beacon/Probe * Response/(Re)Association Request frames and EAPOL-Key * messages in FT initial mobility domain association. Allow * for this, but verify that other parts of the RSN IEs are * identical. */ if (wpa_parse_wpa_ie_rsn(ie1, ie1len, &ie1d) < 0 || wpa_parse_wpa_ie_rsn(ie2, ie2len, &ie2d) < 0) return -1; if (ie1d.proto == ie2d.proto && ie1d.pairwise_cipher == ie2d.pairwise_cipher && ie1d.group_cipher == ie2d.group_cipher && ie1d.key_mgmt == ie2d.key_mgmt && ie1d.capabilities == ie2d.capabilities && ie1d.mgmt_group_cipher == ie2d.mgmt_group_cipher) return 0; } #endif /* CONFIG_IEEE80211R */ return -1; } #ifdef CONFIG_IEEE80211R int wpa_insert_pmkid(u8 *ies, size_t ies_len, const u8 *pmkid) { u8 *start, *end, *rpos, *rend; int added = 0; start = ies; end = ies + ies_len; while (start < end) { if (*start == WLAN_EID_RSN) break; start += 2 + start[1]; } if (start >= end) { wpa_printf(MSG_ERROR, "FT: Could not find RSN IE in " "IEs data"); return -1; } wpa_hexdump(MSG_DEBUG, "FT: RSN IE before modification", start, 2 + start[1]); /* Find start of PMKID-Count */ rpos = start + 2; rend = rpos + start[1]; /* Skip Version and Group Data Cipher Suite */ rpos += 2 + 4; /* Skip Pairwise Cipher Suite Count and List */ rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN; /* Skip AKM Suite Count and List */ rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN; if (rpos == rend) { /* Add RSN Capabilities */ os_memmove(rpos + 2, rpos, end - rpos); *rpos++ = 0; *rpos++ = 0; added += 2; start[1] += 2; rend = rpos; } else { /* Skip RSN Capabilities */ rpos += 2; if (rpos > rend) { wpa_printf(MSG_ERROR, "FT: Could not parse RSN IE in " "IEs data"); return -1; } } if (rpos == rend) { /* No PMKID-Count field included; add it */ os_memmove(rpos + 2 + PMKID_LEN, rpos, end + added - rpos); WPA_PUT_LE16(rpos, 1); rpos += 2; os_memcpy(rpos, pmkid, PMKID_LEN); added += 2 + PMKID_LEN; start[1] += 2 + PMKID_LEN; } else { /* PMKID-Count was included; use it */ if (WPA_GET_LE16(rpos) != 0) { wpa_printf(MSG_ERROR, "FT: Unexpected PMKID " "in RSN IE in EAPOL-Key data"); return -1; } WPA_PUT_LE16(rpos, 1); rpos += 2; os_memmove(rpos + PMKID_LEN, rpos, end + added - rpos); os_memcpy(rpos, pmkid, PMKID_LEN); added += PMKID_LEN; start[1] += PMKID_LEN; } wpa_hexdump(MSG_DEBUG, "FT: RSN IE after modification " "(PMKID inserted)", start, 2 + start[1]); return added; } #endif /* CONFIG_IEEE80211R */ int wpa_cipher_key_len(int cipher) { switch (cipher) { case WPA_CIPHER_CCMP_256: case WPA_CIPHER_GCMP_256: case WPA_CIPHER_BIP_GMAC_256: case WPA_CIPHER_BIP_CMAC_256: return 32; case WPA_CIPHER_CCMP: case WPA_CIPHER_GCMP: case WPA_CIPHER_AES_128_CMAC: case WPA_CIPHER_BIP_GMAC_128: return 16; case WPA_CIPHER_TKIP: return 32; } return 0; } int wpa_cipher_rsc_len(int cipher) { switch (cipher) { case WPA_CIPHER_CCMP_256: case WPA_CIPHER_GCMP_256: case WPA_CIPHER_CCMP: case WPA_CIPHER_GCMP: case WPA_CIPHER_TKIP: return 6; } return 0; } int wpa_cipher_to_alg(int cipher) { switch (cipher) { case WPA_CIPHER_CCMP_256: return WPA_ALG_CCMP_256; case WPA_CIPHER_GCMP_256: return WPA_ALG_GCMP_256; case WPA_CIPHER_CCMP: return WPA_ALG_CCMP; case WPA_CIPHER_GCMP: return WPA_ALG_GCMP; case WPA_CIPHER_TKIP: return WPA_ALG_TKIP; case WPA_CIPHER_AES_128_CMAC: return WPA_ALG_IGTK; case WPA_CIPHER_BIP_GMAC_128: return WPA_ALG_BIP_GMAC_128; case WPA_CIPHER_BIP_GMAC_256: return WPA_ALG_BIP_GMAC_256; case WPA_CIPHER_BIP_CMAC_256: return WPA_ALG_BIP_CMAC_256; } return WPA_ALG_NONE; } int wpa_cipher_valid_pairwise(int cipher) { return cipher == WPA_CIPHER_CCMP_256 || cipher == WPA_CIPHER_GCMP_256 || cipher == WPA_CIPHER_CCMP || cipher == WPA_CIPHER_GCMP || cipher == WPA_CIPHER_TKIP; } u32 wpa_cipher_to_suite(int proto, int cipher) { if (cipher & WPA_CIPHER_CCMP_256) return RSN_CIPHER_SUITE_CCMP_256; if (cipher & WPA_CIPHER_GCMP_256) return RSN_CIPHER_SUITE_GCMP_256; if (cipher & WPA_CIPHER_CCMP) return (proto == WPA_PROTO_RSN ? RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP); if (cipher & WPA_CIPHER_GCMP) return RSN_CIPHER_SUITE_GCMP; if (cipher & WPA_CIPHER_TKIP) return (proto == WPA_PROTO_RSN ? RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP); if (cipher & WPA_CIPHER_NONE) return (proto == WPA_PROTO_RSN ? RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE); if (cipher & WPA_CIPHER_GTK_NOT_USED) return RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED; if (cipher & WPA_CIPHER_AES_128_CMAC) return RSN_CIPHER_SUITE_AES_128_CMAC; if (cipher & WPA_CIPHER_BIP_GMAC_128) return RSN_CIPHER_SUITE_BIP_GMAC_128; if (cipher & WPA_CIPHER_BIP_GMAC_256) return RSN_CIPHER_SUITE_BIP_GMAC_256; if (cipher & WPA_CIPHER_BIP_CMAC_256) return RSN_CIPHER_SUITE_BIP_CMAC_256; return 0; } int rsn_cipher_put_suites(u8 *start, int ciphers) { u8 *pos = start; if (ciphers & WPA_CIPHER_CCMP_256) { RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP_256); pos += RSN_SELECTOR_LEN; } if (ciphers & WPA_CIPHER_GCMP_256) { RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP_256); pos += RSN_SELECTOR_LEN; } if (ciphers & WPA_CIPHER_CCMP) { RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP); pos += RSN_SELECTOR_LEN; } if (ciphers & WPA_CIPHER_GCMP) { RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP); pos += RSN_SELECTOR_LEN; } if (ciphers & WPA_CIPHER_TKIP) { RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP); pos += RSN_SELECTOR_LEN; } if (ciphers & WPA_CIPHER_NONE) { RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NONE); pos += RSN_SELECTOR_LEN; } return (pos - start) / RSN_SELECTOR_LEN; } int wpa_cipher_put_suites(u8 *start, int ciphers) { u8 *pos = start; if (ciphers & WPA_CIPHER_CCMP) { RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP); pos += WPA_SELECTOR_LEN; } if (ciphers & WPA_CIPHER_TKIP) { RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP); pos += WPA_SELECTOR_LEN; } if (ciphers & WPA_CIPHER_NONE) { RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_NONE); pos += WPA_SELECTOR_LEN; } return (pos - start) / RSN_SELECTOR_LEN; } int wpa_pick_pairwise_cipher(int ciphers, int none_allowed) { if (ciphers & WPA_CIPHER_CCMP_256) return WPA_CIPHER_CCMP_256; if (ciphers & WPA_CIPHER_GCMP_256) return WPA_CIPHER_GCMP_256; if (ciphers & WPA_CIPHER_CCMP) return WPA_CIPHER_CCMP; if (ciphers & WPA_CIPHER_GCMP) return WPA_CIPHER_GCMP; if (ciphers & WPA_CIPHER_TKIP) return WPA_CIPHER_TKIP; if (none_allowed && (ciphers & WPA_CIPHER_NONE)) return WPA_CIPHER_NONE; return -1; } int wpa_pick_group_cipher(int ciphers) { if (ciphers & WPA_CIPHER_CCMP_256) return WPA_CIPHER_CCMP_256; if (ciphers & WPA_CIPHER_GCMP_256) return WPA_CIPHER_GCMP_256; if (ciphers & WPA_CIPHER_CCMP) return WPA_CIPHER_CCMP; if (ciphers & WPA_CIPHER_GCMP) return WPA_CIPHER_GCMP; if (ciphers & WPA_CIPHER_GTK_NOT_USED) return WPA_CIPHER_GTK_NOT_USED; if (ciphers & WPA_CIPHER_TKIP) return WPA_CIPHER_TKIP; return -1; } int wpa_parse_cipher(const char *value) { int val = 0, last; char *start, *end, *buf; buf = os_strdup(value); if (buf == NULL) return -1; start = buf; while (*start != '\0') { while (*start == ' ' || *start == '\t') start++; if (*start == '\0') break; end = start; while (*end != ' ' && *end != '\t' && *end != '\0') end++; last = *end == '\0'; *end = '\0'; if (os_strcmp(start, "CCMP-256") == 0) val |= WPA_CIPHER_CCMP_256; else if (os_strcmp(start, "GCMP-256") == 0) val |= WPA_CIPHER_GCMP_256; else if (os_strcmp(start, "CCMP") == 0) val |= WPA_CIPHER_CCMP; else if (os_strcmp(start, "GCMP") == 0) val |= WPA_CIPHER_GCMP; else if (os_strcmp(start, "TKIP") == 0) val |= WPA_CIPHER_TKIP; else if (os_strcmp(start, "WEP104") == 0) val |= WPA_CIPHER_WEP104; else if (os_strcmp(start, "WEP40") == 0) val |= WPA_CIPHER_WEP40; else if (os_strcmp(start, "NONE") == 0) val |= WPA_CIPHER_NONE; else if (os_strcmp(start, "GTK_NOT_USED") == 0) val |= WPA_CIPHER_GTK_NOT_USED; else { os_free(buf); return -1; } if (last) break; start = end + 1; } os_free(buf); return val; } int wpa_write_ciphers(char *start, char *end, int ciphers, const char *delim) { char *pos = start; int ret; if (ciphers & WPA_CIPHER_CCMP_256) { ret = os_snprintf(pos, end - pos, "%sCCMP-256", pos == start ? "" : delim); if (os_snprintf_error(end - pos, ret)) return -1; pos += ret; } if (ciphers & WPA_CIPHER_GCMP_256) { ret = os_snprintf(pos, end - pos, "%sGCMP-256", pos == start ? "" : delim); if (os_snprintf_error(end - pos, ret)) return -1; pos += ret; } if (ciphers & WPA_CIPHER_CCMP) { ret = os_snprintf(pos, end - pos, "%sCCMP", pos == start ? "" : delim); if (os_snprintf_error(end - pos, ret)) return -1; pos += ret; } if (ciphers & WPA_CIPHER_GCMP) { ret = os_snprintf(pos, end - pos, "%sGCMP", pos == start ? "" : delim); if (os_snprintf_error(end - pos, ret)) return -1; pos += ret; } if (ciphers & WPA_CIPHER_TKIP) { ret = os_snprintf(pos, end - pos, "%sTKIP", pos == start ? "" : delim); if (os_snprintf_error(end - pos, ret)) return -1; pos += ret; } if (ciphers & WPA_CIPHER_NONE) { ret = os_snprintf(pos, end - pos, "%sNONE", pos == start ? "" : delim); if (os_snprintf_error(end - pos, ret)) return -1; pos += ret; } return pos - start; } int wpa_select_ap_group_cipher(int wpa, int wpa_pairwise, int rsn_pairwise) { int pairwise = 0; /* Select group cipher based on the enabled pairwise cipher suites */ if (wpa & 1) pairwise |= wpa_pairwise; if (wpa & 2) pairwise |= rsn_pairwise; if (pairwise & WPA_CIPHER_TKIP) return WPA_CIPHER_TKIP; if ((pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP) return WPA_CIPHER_GCMP; if ((pairwise & (WPA_CIPHER_GCMP_256 | WPA_CIPHER_CCMP | WPA_CIPHER_GCMP)) == WPA_CIPHER_GCMP_256) return WPA_CIPHER_GCMP_256; if ((pairwise & (WPA_CIPHER_CCMP_256 | WPA_CIPHER_CCMP | WPA_CIPHER_GCMP)) == WPA_CIPHER_CCMP_256) return WPA_CIPHER_CCMP_256; return WPA_CIPHER_CCMP; }