| /* |
| * WPA/RSN - Shared functions for supplicant and authenticator |
| * Copyright (c) 2002-2015, Jouni Malinen <j@w1.fi> |
| * |
| * 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_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_WEP40) |
| return WPA_CIPHER_WEP40; |
| 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; |
| if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_WEP104) |
| return WPA_CIPHER_WEP104; |
| #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; |
| } |
| |
| |
| static int wpa_cipher_valid_group(int cipher) |
| { |
| return wpa_cipher_valid_pairwise(cipher) || |
| cipher == WPA_CIPHER_WEP104 || |
| cipher == WPA_CIPHER_WEP40 || |
| 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_WEP40) |
| return WPA_CIPHER_WEP40; |
| 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; |
| if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP104) |
| return WPA_CIPHER_WEP104; |
| 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 == 0) { |
| /* No WPA IE - fail silently */ |
| return -1; |
| } |
| |
| 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; |
| } 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 - 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 - 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; |
| case WPA_CIPHER_WEP104: |
| return 13; |
| case WPA_CIPHER_WEP40: |
| return 5; |
| } |
| |
| 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; |
| case WPA_CIPHER_WEP104: |
| case WPA_CIPHER_WEP40: |
| return 0; |
| } |
| |
| 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_WEP104: |
| case WPA_CIPHER_WEP40: |
| return WPA_ALG_WEP; |
| 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_WEP104) |
| return (proto == WPA_PROTO_RSN ? |
| RSN_CIPHER_SUITE_WEP104 : WPA_CIPHER_SUITE_WEP104); |
| if (cipher & WPA_CIPHER_WEP40) |
| return (proto == WPA_PROTO_RSN ? |
| RSN_CIPHER_SUITE_WEP40 : WPA_CIPHER_SUITE_WEP40); |
| 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; |
| if (ciphers & WPA_CIPHER_WEP104) |
| return WPA_CIPHER_WEP104; |
| if (ciphers & WPA_CIPHER_WEP40) |
| return WPA_CIPHER_WEP40; |
| 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_WEP104) { |
| ret = os_snprintf(pos, end - pos, "%sWEP104", |
| pos == start ? "" : delim); |
| if (os_snprintf_error(end - pos, ret)) |
| return -1; |
| pos += ret; |
| } |
| if (ciphers & WPA_CIPHER_WEP40) { |
| ret = os_snprintf(pos, end - pos, "%sWEP40", |
| 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; |
| } |
