/* * WPA/RSN - Shared functions for supplicant and authenticator * Copyright (c) 2002-2018, 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/sha512.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, size_t pmk_len) { switch (akmp) { case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: return 24; case WPA_KEY_MGMT_FILS_SHA256: case WPA_KEY_MGMT_FT_FILS_SHA256: case WPA_KEY_MGMT_FILS_SHA384: case WPA_KEY_MGMT_FT_FILS_SHA384: return 0; case WPA_KEY_MGMT_DPP: return pmk_len / 2; case WPA_KEY_MGMT_OWE: return pmk_len / 2; default: return 16; } } #ifdef CONFIG_IEEE80211R static unsigned int wpa_kck2_len(int akmp) { switch (akmp) { case WPA_KEY_MGMT_FT_FILS_SHA256: return 16; case WPA_KEY_MGMT_FT_FILS_SHA384: return 24; default: return 0; } } #endif /* CONFIG_IEEE80211R */ static unsigned int wpa_kek_len(int akmp, size_t pmk_len) { switch (akmp) { case WPA_KEY_MGMT_FILS_SHA384: case WPA_KEY_MGMT_FT_FILS_SHA384: return 64; case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: case WPA_KEY_MGMT_FILS_SHA256: case WPA_KEY_MGMT_FT_FILS_SHA256: case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: return 32; case WPA_KEY_MGMT_DPP: return pmk_len <= 32 ? 16 : 32; case WPA_KEY_MGMT_OWE: return pmk_len <= 32 ? 16 : 32; default: return 16; } } #ifdef CONFIG_IEEE80211R static unsigned int wpa_kek2_len(int akmp) { switch (akmp) { case WPA_KEY_MGMT_FT_FILS_SHA256: return 16; case WPA_KEY_MGMT_FT_FILS_SHA384: return 32; default: return 0; } } #endif /* CONFIG_IEEE80211R */ unsigned int wpa_mic_len(int akmp, size_t pmk_len) { switch (akmp) { case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192: case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: return 24; case WPA_KEY_MGMT_FILS_SHA256: case WPA_KEY_MGMT_FILS_SHA384: case WPA_KEY_MGMT_FT_FILS_SHA256: case WPA_KEY_MGMT_FT_FILS_SHA384: return 0; case WPA_KEY_MGMT_DPP: return pmk_len / 2; case WPA_KEY_MGMT_OWE: return pmk_len / 2; default: return 16; } } /** * wpa_use_akm_defined - Is AKM-defined Key Descriptor Version used * @akmp: WPA_KEY_MGMT_* used in key derivation * Returns: 1 if AKM-defined Key Descriptor Version is used; 0 otherwise */ int wpa_use_akm_defined(int akmp) { return akmp == WPA_KEY_MGMT_OSEN || akmp == WPA_KEY_MGMT_OWE || akmp == WPA_KEY_MGMT_DPP || akmp == WPA_KEY_MGMT_FT_IEEE8021X_SHA384 || wpa_key_mgmt_sae(akmp) || wpa_key_mgmt_suite_b(akmp) || wpa_key_mgmt_fils(akmp); } /** * wpa_use_cmac - Is CMAC integrity algorithm used for EAPOL-Key MIC * @akmp: WPA_KEY_MGMT_* used in key derivation * Returns: 1 if CMAC is used; 0 otherwise */ int wpa_use_cmac(int akmp) { return akmp == WPA_KEY_MGMT_OSEN || akmp == WPA_KEY_MGMT_OWE || akmp == WPA_KEY_MGMT_DPP || wpa_key_mgmt_ft(akmp) || wpa_key_mgmt_sha256(akmp) || wpa_key_mgmt_sae(akmp) || wpa_key_mgmt_suite_b(akmp); } /** * wpa_use_aes_key_wrap - Is AES Keywrap algorithm used for EAPOL-Key Key Data * @akmp: WPA_KEY_MGMT_* used in key derivation * Returns: 1 if AES Keywrap is used; 0 otherwise * * Note: AKM 00-0F-AC:1 and 00-0F-AC:2 have special rules for selecting whether * to use AES Keywrap based on the negotiated pairwise cipher. This function * does not cover those special cases. */ int wpa_use_aes_key_wrap(int akmp) { return akmp == WPA_KEY_MGMT_OSEN || akmp == WPA_KEY_MGMT_OWE || akmp == WPA_KEY_MGMT_DPP || wpa_key_mgmt_ft(akmp) || wpa_key_mgmt_sha256(akmp) || wpa_key_mgmt_sae(akmp) || wpa_key_mgmt_suite_b(akmp); } /** * 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[SHA512_MAC_LEN]; if (key_len == 0) { wpa_printf(MSG_DEBUG, "WPA: KCK not set - cannot calculate MIC"); return -1; } switch (ver) { #ifndef CONFIG_FIPS case WPA_KEY_INFO_TYPE_HMAC_MD5_RC4: wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using HMAC-MD5"); return hmac_md5(key, key_len, buf, len, mic); #endif /* CONFIG_FIPS */ case WPA_KEY_INFO_TYPE_HMAC_SHA1_AES: wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using HMAC-SHA1"); if (hmac_sha1(key, key_len, buf, len, hash)) return -1; os_memcpy(mic, hash, MD5_MAC_LEN); break; case WPA_KEY_INFO_TYPE_AES_128_CMAC: wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using AES-CMAC"); return omac1_aes_128(key, buf, len, mic); case WPA_KEY_INFO_TYPE_AKM_DEFINED: switch (akmp) { #ifdef CONFIG_SAE case WPA_KEY_MGMT_SAE: case WPA_KEY_MGMT_FT_SAE: wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using AES-CMAC (AKM-defined - SAE)"); return omac1_aes_128(key, buf, len, mic); #endif /* CONFIG_SAE */ #ifdef CONFIG_HS20 case WPA_KEY_MGMT_OSEN: wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using AES-CMAC (AKM-defined - OSEN)"); return omac1_aes_128(key, buf, len, mic); #endif /* CONFIG_HS20 */ #ifdef CONFIG_SUITEB case WPA_KEY_MGMT_IEEE8021X_SUITE_B: wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using HMAC-SHA256 (AKM-defined - 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: wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using HMAC-SHA384 (AKM-defined - Suite B 192-bit)"); if (hmac_sha384(key, key_len, buf, len, hash)) return -1; os_memcpy(mic, hash, 24); break; #endif /* CONFIG_SUITEB192 */ #ifdef CONFIG_OWE case WPA_KEY_MGMT_OWE: wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using HMAC-SHA%u (AKM-defined - OWE)", (unsigned int) key_len * 8 * 2); if (key_len == 128 / 8) { if (hmac_sha256(key, key_len, buf, len, hash)) return -1; } else if (key_len == 192 / 8) { if (hmac_sha384(key, key_len, buf, len, hash)) return -1; } else if (key_len == 256 / 8) { if (hmac_sha512(key, key_len, buf, len, hash)) return -1; } else { wpa_printf(MSG_INFO, "OWE: Unsupported KCK length: %u", (unsigned int) key_len); return -1; } os_memcpy(mic, hash, key_len); break; #endif /* CONFIG_OWE */ #ifdef CONFIG_DPP case WPA_KEY_MGMT_DPP: wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using HMAC-SHA%u (AKM-defined - DPP)", (unsigned int) key_len * 8 * 2); if (key_len == 128 / 8) { if (hmac_sha256(key, key_len, buf, len, hash)) return -1; } else if (key_len == 192 / 8) { if (hmac_sha384(key, key_len, buf, len, hash)) return -1; } else if (key_len == 256 / 8) { if (hmac_sha512(key, key_len, buf, len, hash)) return -1; } else { wpa_printf(MSG_INFO, "DPP: Unsupported KCK length: %u", (unsigned int) key_len); return -1; } os_memcpy(mic, hash, key_len); break; #endif /* CONFIG_DPP */ #if defined(CONFIG_IEEE80211R) && defined(CONFIG_SHA384) case WPA_KEY_MGMT_FT_IEEE8021X_SHA384: wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC using HMAC-SHA384 (AKM-defined - FT 802.1X SHA384)"); if (hmac_sha384(key, key_len, buf, len, hash)) return -1; os_memcpy(mic, hash, 24); break; #endif /* CONFIG_IEEE80211R && CONFIG_SHA384 */ default: wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC algorithm not known (AKM-defined - akmp=0x%x)", akmp); return -1; } break; default: wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key MIC algorithm not known (ver=%d)", ver); 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) * [ || Z.x ]) * * The optional Z.x component is used only with DPP and that part is not defined * in IEEE 802.11. */ 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, const u8 *z, size_t z_len) { #define MAX_Z_LEN 66 /* with NIST P-521 */ u8 data[2 * ETH_ALEN + 2 * WPA_NONCE_LEN + MAX_Z_LEN]; size_t data_len = 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; #ifdef CONFIG_OWE int owe_ptk_workaround = 0; if (akmp == (WPA_KEY_MGMT_OWE | WPA_KEY_MGMT_PSK_SHA256)) { owe_ptk_workaround = 1; akmp = WPA_KEY_MGMT_OWE; } #endif /* CONFIG_OWE */ if (pmk_len == 0) { wpa_printf(MSG_ERROR, "WPA: No PMK set for PTK derivation"); return -1; } if (z_len > MAX_Z_LEN) return -1; 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); } if (z && z_len) { os_memcpy(data + 2 * ETH_ALEN + 2 * WPA_NONCE_LEN, z, z_len); data_len += z_len; } ptk->kck_len = wpa_kck_len(akmp, pmk_len); ptk->kek_len = wpa_kek_len(akmp, pmk_len); ptk->tk_len = wpa_cipher_key_len(cipher); if (ptk->tk_len == 0) { wpa_printf(MSG_ERROR, "WPA: Unsupported cipher (0x%x) used in PTK derivation", cipher); return -1; } ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len; if (wpa_key_mgmt_sha384(akmp)) { #if defined(CONFIG_SUITEB192) || defined(CONFIG_FILS) wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA384)"); if (sha384_prf(pmk, pmk_len, label, data, data_len, tmp, ptk_len) < 0) return -1; #else /* CONFIG_SUITEB192 || CONFIG_FILS */ return -1; #endif /* CONFIG_SUITEB192 || CONFIG_FILS */ } else if (wpa_key_mgmt_sha256(akmp)) { wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA256)"); if (sha256_prf(pmk, pmk_len, label, data, data_len, tmp, ptk_len) < 0) return -1; #ifdef CONFIG_OWE } else if (akmp == WPA_KEY_MGMT_OWE && (pmk_len == 32 || owe_ptk_workaround)) { wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA256)"); if (sha256_prf(pmk, pmk_len, label, data, data_len, tmp, ptk_len) < 0) return -1; } else if (akmp == WPA_KEY_MGMT_OWE && pmk_len == 48) { wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA384)"); if (sha384_prf(pmk, pmk_len, label, data, data_len, tmp, ptk_len) < 0) return -1; } else if (akmp == WPA_KEY_MGMT_OWE && pmk_len == 64) { wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA512)"); if (sha512_prf(pmk, pmk_len, label, data, data_len, tmp, ptk_len) < 0) return -1; } else if (akmp == WPA_KEY_MGMT_OWE) { wpa_printf(MSG_INFO, "OWE: Unknown PMK length %u", (unsigned int) pmk_len); return -1; #endif /* CONFIG_OWE */ #ifdef CONFIG_DPP } else if (akmp == WPA_KEY_MGMT_DPP && pmk_len == 32) { wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA256)"); if (sha256_prf(pmk, pmk_len, label, data, data_len, tmp, ptk_len) < 0) return -1; } else if (akmp == WPA_KEY_MGMT_DPP && pmk_len == 48) { wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA384)"); if (sha384_prf(pmk, pmk_len, label, data, data_len, tmp, ptk_len) < 0) return -1; } else if (akmp == WPA_KEY_MGMT_DPP && pmk_len == 64) { wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA512)"); if (sha512_prf(pmk, pmk_len, label, data, data_len, tmp, ptk_len) < 0) return -1; } else if (akmp == WPA_KEY_MGMT_DPP) { wpa_printf(MSG_INFO, "DPP: Unknown PMK length %u", (unsigned int) pmk_len); return -1; #endif /* CONFIG_DPP */ } else { wpa_printf(MSG_DEBUG, "WPA: PTK derivation using PRF(SHA1)"); if (sha1_prf(pmk, pmk_len, label, data, data_len, tmp, ptk_len) < 0) return -1; } 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); if (z && z_len) wpa_hexdump_key(MSG_DEBUG, "WPA: Z.x", z, z_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); ptk->kek2_len = 0; ptk->kck2_len = 0; os_memset(tmp, 0, sizeof(tmp)); os_memset(data, 0, data_len); return 0; } #ifdef CONFIG_FILS int fils_rmsk_to_pmk(int akmp, const u8 *rmsk, size_t rmsk_len, const u8 *snonce, const u8 *anonce, const u8 *dh_ss, size_t dh_ss_len, u8 *pmk, size_t *pmk_len) { u8 nonces[2 * FILS_NONCE_LEN]; const u8 *addr[2]; size_t len[2]; size_t num_elem; int res; /* PMK = HMAC-Hash(SNonce || ANonce, rMSK [ || DHss ]) */ wpa_printf(MSG_DEBUG, "FILS: rMSK to PMK derivation"); if (wpa_key_mgmt_sha384(akmp)) *pmk_len = SHA384_MAC_LEN; else if (wpa_key_mgmt_sha256(akmp)) *pmk_len = SHA256_MAC_LEN; else return -1; wpa_hexdump_key(MSG_DEBUG, "FILS: rMSK", rmsk, rmsk_len); wpa_hexdump(MSG_DEBUG, "FILS: SNonce", snonce, FILS_NONCE_LEN); wpa_hexdump(MSG_DEBUG, "FILS: ANonce", anonce, FILS_NONCE_LEN); wpa_hexdump(MSG_DEBUG, "FILS: DHss", dh_ss, dh_ss_len); os_memcpy(nonces, snonce, FILS_NONCE_LEN); os_memcpy(&nonces[FILS_NONCE_LEN], anonce, FILS_NONCE_LEN); addr[0] = rmsk; len[0] = rmsk_len; num_elem = 1; if (dh_ss) { addr[1] = dh_ss; len[1] = dh_ss_len; num_elem++; } if (wpa_key_mgmt_sha384(akmp)) res = hmac_sha384_vector(nonces, 2 * FILS_NONCE_LEN, num_elem, addr, len, pmk); else res = hmac_sha256_vector(nonces, 2 * FILS_NONCE_LEN, num_elem, addr, len, pmk); if (res == 0) wpa_hexdump_key(MSG_DEBUG, "FILS: PMK", pmk, *pmk_len); else *pmk_len = 0; return res; } int fils_pmkid_erp(int akmp, const u8 *reauth, size_t reauth_len, u8 *pmkid) { const u8 *addr[1]; size_t len[1]; u8 hash[SHA384_MAC_LEN]; int res; /* PMKID = Truncate-128(Hash(EAP-Initiate/Reauth)) */ addr[0] = reauth; len[0] = reauth_len; if (wpa_key_mgmt_sha384(akmp)) res = sha384_vector(1, addr, len, hash); else if (wpa_key_mgmt_sha256(akmp)) res = sha256_vector(1, addr, len, hash); else return -1; if (res) return res; os_memcpy(pmkid, hash, PMKID_LEN); wpa_hexdump(MSG_DEBUG, "FILS: PMKID", pmkid, PMKID_LEN); return 0; } int fils_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const u8 *spa, const u8 *aa, const u8 *snonce, const u8 *anonce, const u8 *dhss, size_t dhss_len, struct wpa_ptk *ptk, u8 *ick, size_t *ick_len, int akmp, int cipher, u8 *fils_ft, size_t *fils_ft_len) { u8 *data, *pos; size_t data_len; u8 tmp[FILS_ICK_MAX_LEN + WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN + FILS_FT_MAX_LEN]; size_t key_data_len; const char *label = "FILS PTK Derivation"; int ret = -1; /* * FILS-Key-Data = PRF-X(PMK, "FILS PTK Derivation", * SPA || AA || SNonce || ANonce [ || DHss ]) * ICK = L(FILS-Key-Data, 0, ICK_bits) * KEK = L(FILS-Key-Data, ICK_bits, KEK_bits) * TK = L(FILS-Key-Data, ICK_bits + KEK_bits, TK_bits) * If doing FT initial mobility domain association: * FILS-FT = L(FILS-Key-Data, ICK_bits + KEK_bits + TK_bits, * FILS-FT_bits) */ data_len = 2 * ETH_ALEN + 2 * FILS_NONCE_LEN + dhss_len; data = os_malloc(data_len); if (!data) goto err; pos = data; os_memcpy(pos, spa, ETH_ALEN); pos += ETH_ALEN; os_memcpy(pos, aa, ETH_ALEN); pos += ETH_ALEN; os_memcpy(pos, snonce, FILS_NONCE_LEN); pos += FILS_NONCE_LEN; os_memcpy(pos, anonce, FILS_NONCE_LEN); pos += FILS_NONCE_LEN; if (dhss) os_memcpy(pos, dhss, dhss_len); ptk->kck_len = 0; ptk->kek_len = wpa_kek_len(akmp, pmk_len); ptk->tk_len = wpa_cipher_key_len(cipher); if (wpa_key_mgmt_sha384(akmp)) *ick_len = 48; else if (wpa_key_mgmt_sha256(akmp)) *ick_len = 32; else goto err; key_data_len = *ick_len + ptk->kek_len + ptk->tk_len; if (fils_ft && fils_ft_len) { if (akmp == WPA_KEY_MGMT_FT_FILS_SHA256) { *fils_ft_len = 32; } else if (akmp == WPA_KEY_MGMT_FT_FILS_SHA384) { *fils_ft_len = 48; } else { *fils_ft_len = 0; fils_ft = NULL; } key_data_len += *fils_ft_len; } if (wpa_key_mgmt_sha384(akmp)) { wpa_printf(MSG_DEBUG, "FILS: PTK derivation using PRF(SHA384)"); if (sha384_prf(pmk, pmk_len, label, data, data_len, tmp, key_data_len) < 0) goto err; } else { wpa_printf(MSG_DEBUG, "FILS: PTK derivation using PRF(SHA256)"); if (sha256_prf(pmk, pmk_len, label, data, data_len, tmp, key_data_len) < 0) goto err; } wpa_printf(MSG_DEBUG, "FILS: PTK derivation - SPA=" MACSTR " AA=" MACSTR, MAC2STR(spa), MAC2STR(aa)); wpa_hexdump(MSG_DEBUG, "FILS: SNonce", snonce, FILS_NONCE_LEN); wpa_hexdump(MSG_DEBUG, "FILS: ANonce", anonce, FILS_NONCE_LEN); if (dhss) wpa_hexdump_key(MSG_DEBUG, "FILS: DHss", dhss, dhss_len); wpa_hexdump_key(MSG_DEBUG, "FILS: PMK", pmk, pmk_len); wpa_hexdump_key(MSG_DEBUG, "FILS: FILS-Key-Data", tmp, key_data_len); os_memcpy(ick, tmp, *ick_len); wpa_hexdump_key(MSG_DEBUG, "FILS: ICK", ick, *ick_len); os_memcpy(ptk->kek, tmp + *ick_len, ptk->kek_len); wpa_hexdump_key(MSG_DEBUG, "FILS: KEK", ptk->kek, ptk->kek_len); os_memcpy(ptk->tk, tmp + *ick_len + ptk->kek_len, ptk->tk_len); wpa_hexdump_key(MSG_DEBUG, "FILS: TK", ptk->tk, ptk->tk_len); if (fils_ft && fils_ft_len) { os_memcpy(fils_ft, tmp + *ick_len + ptk->kek_len + ptk->tk_len, *fils_ft_len); wpa_hexdump_key(MSG_DEBUG, "FILS: FILS-FT", fils_ft, *fils_ft_len); } ptk->kek2_len = 0; ptk->kck2_len = 0; os_memset(tmp, 0, sizeof(tmp)); ret = 0; err: bin_clear_free(data, data_len); return ret; } int fils_key_auth_sk(const u8 *ick, size_t ick_len, const u8 *snonce, const u8 *anonce, const u8 *sta_addr, const u8 *bssid, const u8 *g_sta, size_t g_sta_len, const u8 *g_ap, size_t g_ap_len, int akmp, u8 *key_auth_sta, u8 *key_auth_ap, size_t *key_auth_len) { const u8 *addr[6]; size_t len[6]; size_t num_elem = 4; int res; wpa_printf(MSG_DEBUG, "FILS: Key-Auth derivation: STA-MAC=" MACSTR " AP-BSSID=" MACSTR, MAC2STR(sta_addr), MAC2STR(bssid)); wpa_hexdump_key(MSG_DEBUG, "FILS: ICK", ick, ick_len); wpa_hexdump(MSG_DEBUG, "FILS: SNonce", snonce, FILS_NONCE_LEN); wpa_hexdump(MSG_DEBUG, "FILS: ANonce", anonce, FILS_NONCE_LEN); wpa_hexdump(MSG_DEBUG, "FILS: gSTA", g_sta, g_sta_len); wpa_hexdump(MSG_DEBUG, "FILS: gAP", g_ap, g_ap_len); /* * For (Re)Association Request frame (STA->AP): * Key-Auth = HMAC-Hash(ICK, SNonce || ANonce || STA-MAC || AP-BSSID * [ || gSTA || gAP ]) */ addr[0] = snonce; len[0] = FILS_NONCE_LEN; addr[1] = anonce; len[1] = FILS_NONCE_LEN; addr[2] = sta_addr; len[2] = ETH_ALEN; addr[3] = bssid; len[3] = ETH_ALEN; if (g_sta && g_sta_len && g_ap && g_ap_len) { addr[4] = g_sta; len[4] = g_sta_len; addr[5] = g_ap; len[5] = g_ap_len; num_elem = 6; } if (wpa_key_mgmt_sha384(akmp)) { *key_auth_len = 48; res = hmac_sha384_vector(ick, ick_len, num_elem, addr, len, key_auth_sta); } else if (wpa_key_mgmt_sha256(akmp)) { *key_auth_len = 32; res = hmac_sha256_vector(ick, ick_len, num_elem, addr, len, key_auth_sta); } else { return -1; } if (res < 0) return res; /* * For (Re)Association Response frame (AP->STA): * Key-Auth = HMAC-Hash(ICK, ANonce || SNonce || AP-BSSID || STA-MAC * [ || gAP || gSTA ]) */ addr[0] = anonce; addr[1] = snonce; addr[2] = bssid; addr[3] = sta_addr; if (g_sta && g_sta_len && g_ap && g_ap_len) { addr[4] = g_ap; len[4] = g_ap_len; addr[5] = g_sta; len[5] = g_sta_len; } if (wpa_key_mgmt_sha384(akmp)) res = hmac_sha384_vector(ick, ick_len, num_elem, addr, len, key_auth_ap); else if (wpa_key_mgmt_sha256(akmp)) res = hmac_sha256_vector(ick, ick_len, num_elem, addr, len, key_auth_ap); if (res < 0) return res; wpa_hexdump(MSG_DEBUG, "FILS: Key-Auth (STA)", key_auth_sta, *key_auth_len); wpa_hexdump(MSG_DEBUG, "FILS: Key-Auth (AP)", key_auth_ap, *key_auth_len); return 0; } #endif /* CONFIG_FILS */ #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, const u8 *rsnxe, size_t rsnxe_len, u8 *mic) { const u8 *addr[10]; size_t len[10]; size_t i, num_elem = 0; u8 zero_mic[24]; size_t mic_len, fte_fixed_len; if (kck_len == 16) { mic_len = 16; #ifdef CONFIG_SHA384 } else if (kck_len == 24) { mic_len = 24; #endif /* CONFIG_SHA384 */ } else { wpa_printf(MSG_WARNING, "FT: Unsupported KCK length %u", (unsigned int) kck_len); return -1; } fte_fixed_len = sizeof(struct rsn_ftie) - 16 + mic_len; 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 + fte_fixed_len) 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, mic_len); addr[num_elem] = zero_mic; len[num_elem] = mic_len; num_elem++; /* Rest of FTIE */ addr[num_elem] = ftie + 2 + 2 + mic_len; len[num_elem] = ftie_len - (2 + 2 + mic_len); num_elem++; } if (ric) { addr[num_elem] = ric; len[num_elem] = ric_len; num_elem++; } if (rsnxe) { addr[num_elem] = rsnxe; len[num_elem] = rsnxe_len; num_elem++; } for (i = 0; i < num_elem; i++) wpa_hexdump(MSG_MSGDUMP, "FT: MIC data", addr[i], len[i]); #ifdef CONFIG_SHA384 if (kck_len == 24) { u8 hash[SHA384_MAC_LEN]; if (hmac_sha384_vector(kck, kck_len, num_elem, addr, len, hash)) return -1; os_memcpy(mic, hash, 24); } #endif /* CONFIG_SHA384 */ if (kck_len == 16 && 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, int use_sha384) { const u8 *end, *pos; parse->ftie = ie; parse->ftie_len = ie_len; pos = ie + (use_sha384 ? sizeof(struct rsn_ftie_sha384) : sizeof(struct rsn_ftie)); end = ie + ie_len; wpa_hexdump(MSG_DEBUG, "FT: Parse FTE subelements", pos, end - pos); while (end - pos >= 2) { u8 id, len; id = *pos++; len = *pos++; if (len > end - pos) { wpa_printf(MSG_DEBUG, "FT: Truncated subelement"); break; } switch (id) { case FTIE_SUBELEM_R1KH_ID: if (len != FT_R1KH_ID_LEN) { wpa_printf(MSG_DEBUG, "FT: Invalid R1KH-ID length in FTIE: %d", len); return -1; } parse->r1kh_id = pos; break; case FTIE_SUBELEM_GTK: parse->gtk = pos; parse->gtk_len = len; break; case FTIE_SUBELEM_R0KH_ID: if (len < 1 || len > FT_R0KH_ID_MAX_LEN) { wpa_printf(MSG_DEBUG, "FT: Invalid R0KH-ID length in FTIE: %d", len); return -1; } parse->r0kh_id = pos; parse->r0kh_id_len = len; break; case FTIE_SUBELEM_IGTK: parse->igtk = pos; parse->igtk_len = len; break; #ifdef CONFIG_OCV case FTIE_SUBELEM_OCI: parse->oci = pos; parse->oci_len = len; break; #endif /* CONFIG_OCV */ case FTIE_SUBELEM_BIGTK: parse->bigtk = pos; parse->bigtk_len = len; break; default: wpa_printf(MSG_DEBUG, "FT: Unknown subelem id %u", id); break; } pos += len; } return 0; } int wpa_ft_parse_ies(const u8 *ies, size_t ies_len, struct wpa_ft_ies *parse, int use_sha384) { const u8 *end, *pos; struct wpa_ie_data data; int ret; const struct rsn_ftie *ftie; int prot_ie_count = 0; int update_use_sha384 = 0; if (use_sha384 < 0) { use_sha384 = 0; update_use_sha384 = 1; } os_memset(parse, 0, sizeof(*parse)); if (ies == NULL) return 0; pos = ies; end = ies + ies_len; while (end - pos >= 2) { u8 id, len; id = *pos++; len = *pos++; if (len > end - pos) break; switch (id) { case WLAN_EID_RSN: wpa_hexdump(MSG_DEBUG, "FT: RSNE", pos, len); parse->rsn = pos; parse->rsn_len = len; 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; } parse->rsn_capab = data.capabilities; if (data.num_pmkid == 1 && data.pmkid) parse->rsn_pmkid = data.pmkid; parse->key_mgmt = data.key_mgmt; parse->pairwise_cipher = data.pairwise_cipher; if (update_use_sha384) { use_sha384 = wpa_key_mgmt_sha384(parse->key_mgmt); update_use_sha384 = 0; } break; case WLAN_EID_RSNX: wpa_hexdump(MSG_DEBUG, "FT: RSNXE", pos, len); if (len < 1) break; parse->rsnxe = pos; parse->rsnxe_len = len; break; case WLAN_EID_MOBILITY_DOMAIN: wpa_hexdump(MSG_DEBUG, "FT: MDE", pos, len); if (len < sizeof(struct rsn_mdie)) return -1; parse->mdie = pos; parse->mdie_len = len; break; case WLAN_EID_FAST_BSS_TRANSITION: wpa_hexdump(MSG_DEBUG, "FT: FTE", pos, len); if (use_sha384) { const struct rsn_ftie_sha384 *ftie_sha384; if (len < sizeof(*ftie_sha384)) return -1; ftie_sha384 = (const struct rsn_ftie_sha384 *) pos; wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC Control", ftie_sha384->mic_control, 2); wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC", ftie_sha384->mic, sizeof(ftie_sha384->mic)); parse->fte_anonce = ftie_sha384->anonce; wpa_hexdump(MSG_DEBUG, "FT: FTE-ANonce", ftie_sha384->anonce, WPA_NONCE_LEN); parse->fte_snonce = ftie_sha384->snonce; wpa_hexdump(MSG_DEBUG, "FT: FTE-SNonce", ftie_sha384->snonce, WPA_NONCE_LEN); prot_ie_count = ftie_sha384->mic_control[1]; if (wpa_ft_parse_ftie(pos, len, parse, 1) < 0) return -1; break; } if (len < sizeof(*ftie)) return -1; ftie = (const struct rsn_ftie *) pos; wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC Control", ftie->mic_control, 2); wpa_hexdump(MSG_DEBUG, "FT: FTE-MIC", ftie->mic, sizeof(ftie->mic)); parse->fte_anonce = ftie->anonce; wpa_hexdump(MSG_DEBUG, "FT: FTE-ANonce", ftie->anonce, WPA_NONCE_LEN); parse->fte_snonce = ftie->snonce; wpa_hexdump(MSG_DEBUG, "FT: FTE-SNonce", ftie->snonce, WPA_NONCE_LEN); prot_ie_count = ftie->mic_control[1]; if (wpa_ft_parse_ftie(pos, len, parse, 0) < 0) return -1; break; case WLAN_EID_TIMEOUT_INTERVAL: wpa_hexdump(MSG_DEBUG, "FT: Timeout Interval", pos, len); if (len != 5) break; parse->tie = pos; parse->tie_len = len; break; case WLAN_EID_RIC_DATA: if (parse->ric == NULL) parse->ric = pos - 2; break; } pos += len; } 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 (parse->rsnxe) 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) */ if (parse->ric) { pos = parse->ric; while (end - pos >= 2 && 2 + pos[1] <= end - pos && 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; if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_AES_128_CMAC) return WPA_CIPHER_AES_128_CMAC; 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; #ifdef CONFIG_SHA384 if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X_SHA384) return WPA_KEY_MGMT_FT_IEEE8021X_SHA384; #endif /* CONFIG_SHA384 */ #endif /* CONFIG_IEEE80211R */ 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; #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_FILS_SHA256) return WPA_KEY_MGMT_FILS_SHA256; if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FILS_SHA384) return WPA_KEY_MGMT_FILS_SHA384; if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_FILS_SHA256) return WPA_KEY_MGMT_FT_FILS_SHA256; if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_FILS_SHA384) return WPA_KEY_MGMT_FT_FILS_SHA384; #ifdef CONFIG_OWE if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_OWE) return WPA_KEY_MGMT_OWE; #endif /* CONFIG_OWE */ #ifdef CONFIG_DPP if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_DPP) return WPA_KEY_MGMT_DPP; #endif /* CONFIG_DPP */ 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; } 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; } /** * 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; data->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC; 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->group_cipher = WPA_CIPHER_GTK_NOT_USED; data->has_group = 1; data->key_mgmt = WPA_KEY_MGMT_OSEN; 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); data->has_group = 1; if (!wpa_cipher_valid_group(data->group_cipher)) { wpa_printf(MSG_DEBUG, "%s: invalid group cipher 0x%x (%08x)", __func__, data->group_cipher, WPA_GET_BE32(pos)); 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; } if (count) data->has_pairwise = 1; for (i = 0; i < count; i++) { data->pairwise_cipher |= rsn_selector_to_bitfield(pos); pos += RSN_SELECTOR_LEN; left -= RSN_SELECTOR_LEN; } if (data->pairwise_cipher & WPA_CIPHER_AES_128_CMAC) { wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as " "pairwise cipher", __func__); return -1; } } 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; } } 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 (%08x)", __func__, data->mgmt_group_cipher, WPA_GET_BE32(pos)); return -10; } pos += RSN_SELECTOR_LEN; left -= RSN_SELECTOR_LEN; } 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; } int wpa_default_rsn_cipher(int freq) { if (freq > 56160) return WPA_CIPHER_GCMP; /* DMG */ return WPA_CIPHER_CCMP; } #ifdef CONFIG_IEEE80211R /** * wpa_derive_pmk_r0 - Derive PMK-R0 and PMKR0Name * * IEEE Std 802.11r-2008 - 8.5.1.5.3 */ int 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, int use_sha384) { u8 buf[1 + SSID_MAX_LEN + MOBILITY_DOMAIN_ID_LEN + 1 + FT_R0KH_ID_MAX_LEN + ETH_ALEN]; u8 *pos, r0_key_data[64], hash[48]; const u8 *addr[2]; size_t len[2]; size_t q = use_sha384 ? 48 : 32; size_t r0_key_data_len = q + 16; /* * 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; or the first * 384 bits of MSK for FT-EAP-SHA384. * PMK-R0 = L(R0-Key-Data, 0, Q) * PMK-R0Name-Salt = L(R0-Key-Data, Q, 128) * Q = 384 for FT-EAP-SHA384; otherwise, 256 */ if (ssid_len > SSID_MAX_LEN || r0kh_id_len > FT_R0KH_ID_MAX_LEN) return -1; wpa_printf(MSG_DEBUG, "FT: Derive PMK-R0 using KDF-%s", use_sha384 ? "SHA384" : "SHA256"); wpa_hexdump_key(MSG_DEBUG, "FT: XXKey", xxkey, xxkey_len); wpa_hexdump_ascii(MSG_DEBUG, "FT: SSID", ssid, ssid_len); wpa_hexdump(MSG_DEBUG, "FT: MDID", mdid, MOBILITY_DOMAIN_ID_LEN); wpa_hexdump_ascii(MSG_DEBUG, "FT: R0KH-ID", r0kh_id, r0kh_id_len); wpa_printf(MSG_DEBUG, "FT: S0KH-ID: " MACSTR, MAC2STR(s0kh_id)); 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; #ifdef CONFIG_SHA384 if (use_sha384) { if (xxkey_len != SHA384_MAC_LEN) { wpa_printf(MSG_ERROR, "FT: Unexpected XXKey length %d (expected %d)", (int) xxkey_len, SHA384_MAC_LEN); return -1; } if (sha384_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf, r0_key_data, r0_key_data_len) < 0) return -1; } #endif /* CONFIG_SHA384 */ if (!use_sha384) { if (xxkey_len != PMK_LEN) { wpa_printf(MSG_ERROR, "FT: Unexpected XXKey length %d (expected %d)", (int) xxkey_len, PMK_LEN); return -1; } if (sha256_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf, r0_key_data, r0_key_data_len) < 0) return -1; } os_memcpy(pmk_r0, r0_key_data, q); wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, q); wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0Name-Salt", &r0_key_data[q], 16); /* * PMKR0Name = Truncate-128(Hash("FT-R0N" || PMK-R0Name-Salt) */ addr[0] = (const u8 *) "FT-R0N"; len[0] = 6; addr[1] = &r0_key_data[q]; len[1] = 16; #ifdef CONFIG_SHA384 if (use_sha384 && sha384_vector(2, addr, len, hash) < 0) return -1; #endif /* CONFIG_SHA384 */ if (!use_sha384 && sha256_vector(2, addr, len, hash) < 0) return -1; os_memcpy(pmk_r0_name, hash, WPA_PMK_NAME_LEN); os_memset(r0_key_data, 0, sizeof(r0_key_data)); return 0; } /** * wpa_derive_pmk_r1_name - Derive PMKR1Name * * IEEE Std 802.11r-2008 - 8.5.1.5.4 */ int wpa_derive_pmk_r1_name(const u8 *pmk_r0_name, const u8 *r1kh_id, const u8 *s1kh_id, u8 *pmk_r1_name, int use_sha384) { u8 hash[48]; const u8 *addr[4]; size_t len[4]; /* * PMKR1Name = Truncate-128(Hash("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; #ifdef CONFIG_SHA384 if (use_sha384 && sha384_vector(4, addr, len, hash) < 0) return -1; #endif /* CONFIG_SHA384 */ if (!use_sha384 && sha256_vector(4, addr, len, hash) < 0) return -1; os_memcpy(pmk_r1_name, hash, WPA_PMK_NAME_LEN); return 0; } /** * wpa_derive_pmk_r1 - Derive PMK-R1 and PMKR1Name from PMK-R0 * * IEEE Std 802.11r-2008 - 8.5.1.5.4 */ int wpa_derive_pmk_r1(const u8 *pmk_r0, size_t pmk_r0_len, 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) */ wpa_printf(MSG_DEBUG, "FT: Derive PMK-R1 using KDF-%s", pmk_r0_len == SHA384_MAC_LEN ? "SHA384" : "SHA256"); wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, pmk_r0_len); wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID", r1kh_id, FT_R1KH_ID_LEN); wpa_printf(MSG_DEBUG, "FT: S1KH-ID: " MACSTR, MAC2STR(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; #ifdef CONFIG_SHA384 if (pmk_r0_len == SHA384_MAC_LEN && sha384_prf(pmk_r0, pmk_r0_len, "FT-R1", buf, pos - buf, pmk_r1, pmk_r0_len) < 0) return -1; #endif /* CONFIG_SHA384 */ if (pmk_r0_len == PMK_LEN && sha256_prf(pmk_r0, pmk_r0_len, "FT-R1", buf, pos - buf, pmk_r1, pmk_r0_len) < 0) return -1; if (pmk_r0_len != SHA384_MAC_LEN && pmk_r0_len != PMK_LEN) { wpa_printf(MSG_ERROR, "FT: Unexpected PMK-R0 length %d", (int) pmk_r0_len); return -1; } wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, pmk_r0_len); return wpa_derive_pmk_r1_name(pmk_r0_name, r1kh_id, s1kh_id, pmk_r1_name, pmk_r0_len == SHA384_MAC_LEN); } /** * 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, size_t pmk_r1_len, 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[2 * WPA_KCK_MAX_LEN + 2 * WPA_KEK_MAX_LEN + WPA_TK_MAX_LEN]; size_t ptk_len, offset; int use_sha384 = wpa_key_mgmt_sha384(akmp); /* * PTK = KDF-PTKLen(PMK-R1, "FT-PTK", SNonce || ANonce || * BSSID || STA-ADDR) */ wpa_printf(MSG_DEBUG, "FT: Derive PTK using KDF-%s", use_sha384 ? "SHA384" : "SHA256"); wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, pmk_r1_len); wpa_hexdump(MSG_DEBUG, "FT: SNonce", snonce, WPA_NONCE_LEN); wpa_hexdump(MSG_DEBUG, "FT: ANonce", anonce, WPA_NONCE_LEN); wpa_printf(MSG_DEBUG, "FT: BSSID=" MACSTR " STA-ADDR=" MACSTR, MAC2STR(bssid), MAC2STR(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, PMK_LEN); ptk->kck2_len = wpa_kck2_len(akmp); ptk->kek_len = wpa_kek_len(akmp, PMK_LEN); ptk->kek2_len = wpa_kek2_len(akmp); ptk->tk_len = wpa_cipher_key_len(cipher); ptk_len = ptk->kck_len + ptk->kek_len + ptk->tk_len + ptk->kck2_len + ptk->kek2_len; #ifdef CONFIG_SHA384 if (use_sha384) { if (pmk_r1_len != SHA384_MAC_LEN) { wpa_printf(MSG_ERROR, "FT: Unexpected PMK-R1 length %d (expected %d)", (int) pmk_r1_len, SHA384_MAC_LEN); return -1; } if (sha384_prf(pmk_r1, pmk_r1_len, "FT-PTK", buf, pos - buf, tmp, ptk_len) < 0) return -1; } #endif /* CONFIG_SHA384 */ if (!use_sha384) { if (pmk_r1_len != PMK_LEN) { wpa_printf(MSG_ERROR, "FT: Unexpected PMK-R1 length %d (expected %d)", (int) pmk_r1_len, PMK_LEN); return -1; } if (sha256_prf(pmk_r1, pmk_r1_len, "FT-PTK", buf, pos - buf, tmp, ptk_len) < 0) return -1; } wpa_hexdump_key(MSG_DEBUG, "FT: PTK", tmp, ptk_len); /* * PTKName = Truncate-128(SHA-256(PMKR1Name || "FT-PTKN" || SNonce || * ANonce || BSSID || STA-ADDR)) */ wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", pmk_r1_name, WPA_PMK_NAME_LEN); 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; if (sha256_vector(6, addr, len, hash) < 0) return -1; os_memcpy(ptk_name, hash, WPA_PMK_NAME_LEN); os_memcpy(ptk->kck, tmp, ptk->kck_len); offset = ptk->kck_len; os_memcpy(ptk->kek, tmp + offset, ptk->kek_len); offset += ptk->kek_len; os_memcpy(ptk->tk, tmp + offset, ptk->tk_len); offset += ptk->tk_len; os_memcpy(ptk->kck2, tmp + offset, ptk->kck2_len); offset += ptk->kck2_len; os_memcpy(ptk->kek2, tmp + offset, ptk->kek2_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); if (ptk->kck2_len) wpa_hexdump_key(MSG_DEBUG, "FT: KCK2", ptk->kck2, ptk->kck2_len); if (ptk->kek2_len) wpa_hexdump_key(MSG_DEBUG, "FT: KEK2", ptk->kek2, ptk->kek2_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 * @akmp: Negotiated key management protocol * * IEEE Std 802.11-2016 - 12.7.1.3 Pairwise key hierarchy * AKM: 00-0F-AC:5, 00-0F-AC:6, 00-0F-AC:14, 00-0F-AC:16 * PMKID = Truncate-128(HMAC-SHA-256(PMK, "PMK Name" || AA || SPA)) * AKM: 00-0F-AC:11 * See rsn_pmkid_suite_b() * AKM: 00-0F-AC:12 * See rsn_pmkid_suite_b_192() * AKM: 00-0F-AC:13, 00-0F-AC:15, 00-0F-AC:17 * PMKID = Truncate-128(HMAC-SHA-384(PMK, "PMK Name" || AA || SPA)) * Otherwise: * PMKID = Truncate-128(HMAC-SHA-1(PMK, "PMK Name" || AA || SPA)) */ void rsn_pmkid(const u8 *pmk, size_t pmk_len, const u8 *aa, const u8 *spa, u8 *pmkid, int akmp) { 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 (0) { #if defined(CONFIG_FILS) || defined(CONFIG_SHA384) } else if (wpa_key_mgmt_sha384(akmp)) { wpa_printf(MSG_DEBUG, "RSN: Derive PMKID using HMAC-SHA-384"); hmac_sha384_vector(pmk, pmk_len, 3, addr, len, hash); #endif /* CONFIG_FILS || CONFIG_SHA384 */ } else if (wpa_key_mgmt_sha256(akmp)) { wpa_printf(MSG_DEBUG, "RSN: Derive PMKID using HMAC-SHA-256"); hmac_sha256_vector(pmk, pmk_len, 3, addr, len, hash); } else { wpa_printf(MSG_DEBUG, "RSN: Derive PMKID using HMAC-SHA-1"); hmac_sha1_vector(pmk, pmk_len, 3, addr, len, hash); } wpa_hexdump(MSG_DEBUG, "RSN: Derived PMKID", hash, PMKID_LEN); 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"; #ifdef CONFIG_WEP case WPA_CIPHER_WEP40: return "WEP-40"; case WPA_CIPHER_WEP104: return "WEP-104"; #endif /* CONFIG_WEP */ 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_AES_128_CMAC: return "BIP"; case WPA_CIPHER_BIP_GMAC_128: return "BIP-GMAC-128"; case WPA_CIPHER_BIP_GMAC_256: return "BIP-GMAC-256"; case WPA_CIPHER_BIP_CMAC_256: return "BIP-CMAC-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_WPA_NONE: return "WPA-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_IEEE8021X_SHA384: return "FT-EAP-SHA384"; case WPA_KEY_MGMT_FT_PSK: return "FT-PSK"; #endif /* CONFIG_IEEE80211R */ case WPA_KEY_MGMT_IEEE8021X_SHA256: return "WPA2-EAP-SHA256"; case WPA_KEY_MGMT_PSK_SHA256: return "WPA2-PSK-SHA256"; 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"; case WPA_KEY_MGMT_FILS_SHA256: return "FILS-SHA256"; case WPA_KEY_MGMT_FILS_SHA384: return "FILS-SHA384"; case WPA_KEY_MGMT_FT_FILS_SHA256: return "FT-FILS-SHA256"; case WPA_KEY_MGMT_FT_FILS_SHA384: return "FT-FILS-SHA384"; case WPA_KEY_MGMT_OWE: return "OWE"; case WPA_KEY_MGMT_DPP: return "DPP"; default: return "UNKNOWN"; } } u32 wpa_akm_to_suite(int akm) { if (akm & WPA_KEY_MGMT_FT_IEEE8021X_SHA384) return RSN_AUTH_KEY_MGMT_FT_802_1X_SHA384; if (akm & WPA_KEY_MGMT_FT_IEEE8021X) return RSN_AUTH_KEY_MGMT_FT_802_1X; if (akm & WPA_KEY_MGMT_FT_PSK) return RSN_AUTH_KEY_MGMT_FT_PSK; if (akm & WPA_KEY_MGMT_IEEE8021X_SHA256) return RSN_AUTH_KEY_MGMT_802_1X_SHA256; if (akm & WPA_KEY_MGMT_IEEE8021X) return RSN_AUTH_KEY_MGMT_UNSPEC_802_1X; if (akm & WPA_KEY_MGMT_PSK_SHA256) return RSN_AUTH_KEY_MGMT_PSK_SHA256; if (akm & WPA_KEY_MGMT_PSK) return RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X; if (akm & WPA_KEY_MGMT_CCKM) return RSN_AUTH_KEY_MGMT_CCKM; if (akm & WPA_KEY_MGMT_OSEN) return RSN_AUTH_KEY_MGMT_OSEN; if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B) return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B; if (akm & WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) return RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192; if (akm & WPA_KEY_MGMT_FILS_SHA256) return RSN_AUTH_KEY_MGMT_FILS_SHA256; if (akm & WPA_KEY_MGMT_FILS_SHA384) return RSN_AUTH_KEY_MGMT_FILS_SHA384; if (akm & WPA_KEY_MGMT_FT_FILS_SHA256) return RSN_AUTH_KEY_MGMT_FT_FILS_SHA256; if (akm & WPA_KEY_MGMT_FT_FILS_SHA384) return RSN_AUTH_KEY_MGMT_FT_FILS_SHA384; if (akm & WPA_KEY_MGMT_SAE) return RSN_AUTH_KEY_MGMT_SAE; if (akm & WPA_KEY_MGMT_FT_SAE) return RSN_AUTH_KEY_MGMT_FT_SAE; if (akm & WPA_KEY_MGMT_OWE) return RSN_AUTH_KEY_MGMT_OWE; if (akm & WPA_KEY_MGMT_DPP) return RSN_AUTH_KEY_MGMT_DPP; 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; } 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, "RSN: Could not find RSNE in IEs data"); return -1; } wpa_hexdump(MSG_DEBUG, "RSN: RSNE 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, "RSN: Could not parse RSNE 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 { u16 num_pmkid; if (rend - rpos < 2) return -1; num_pmkid = WPA_GET_LE16(rpos); /* PMKID-Count was included; use it */ if (num_pmkid != 0) { u8 *after; if (num_pmkid * PMKID_LEN > rend - rpos - 2) return -1; /* * PMKID may have been included in RSN IE in * (Re)Association Request frame, so remove the old * PMKID(s) first before adding the new one. */ wpa_printf(MSG_DEBUG, "RSN: Remove %u old PMKID(s) from RSNE", num_pmkid); after = rpos + 2 + num_pmkid * PMKID_LEN; os_memmove(rpos + 2, after, end - after); start[1] -= num_pmkid * PMKID_LEN; added -= num_pmkid * PMKID_LEN; } 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, "RSN: RSNE after modification (PMKID inserted)", start, 2 + start[1]); *ies_len += added; return 0; } 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; } enum wpa_alg 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; #ifdef CONFIG_WEP else if (os_strcmp(start, "WEP104") == 0) val |= WPA_CIPHER_WEP104; else if (os_strcmp(start, "WEP40") == 0) val |= WPA_CIPHER_WEP40; #endif /* CONFIG_WEP */ 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 if (os_strcmp(start, "AES-128-CMAC") == 0) val |= WPA_CIPHER_AES_128_CMAC; else if (os_strcmp(start, "BIP-GMAC-128") == 0) val |= WPA_CIPHER_BIP_GMAC_128; else if (os_strcmp(start, "BIP-GMAC-256") == 0) val |= WPA_CIPHER_BIP_GMAC_256; else if (os_strcmp(start, "BIP-CMAC-256") == 0) val |= WPA_CIPHER_BIP_CMAC_256; 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_AES_128_CMAC) { ret = os_snprintf(pos, end - pos, "%sAES-128-CMAC", pos == start ? "" : delim); if (os_snprintf_error(end - pos, ret)) return -1; pos += ret; } if (ciphers & WPA_CIPHER_BIP_GMAC_128) { ret = os_snprintf(pos, end - pos, "%sBIP-GMAC-128", pos == start ? "" : delim); if (os_snprintf_error(end - pos, ret)) return -1; pos += ret; } if (ciphers & WPA_CIPHER_BIP_GMAC_256) { ret = os_snprintf(pos, end - pos, "%sBIP-GMAC-256", pos == start ? "" : delim); if (os_snprintf_error(end - pos, ret)) return -1; pos += ret; } if (ciphers & WPA_CIPHER_BIP_CMAC_256) { ret = os_snprintf(pos, end - pos, "%sBIP-CMAC-256", 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; } #ifdef CONFIG_FILS int fils_domain_name_hash(const char *domain, u8 *hash) { char buf[255], *wpos = buf; const char *pos = domain; size_t len; const u8 *addr[1]; u8 mac[SHA256_MAC_LEN]; for (len = 0; len < sizeof(buf) && *pos; len++) { if (isalpha(*pos) && isupper(*pos)) *wpos++ = tolower(*pos); else *wpos++ = *pos; pos++; } addr[0] = (const u8 *) buf; if (sha256_vector(1, addr, &len, mac) < 0) return -1; os_memcpy(hash, mac, 2); return 0; } #endif /* CONFIG_FILS */ /** * wpa_parse_vendor_specific - Parse Vendor Specific IEs * @pos: Pointer to the IE header * @end: Pointer to the end of the Key Data buffer * @ie: Pointer to parsed IE data * Returns: 0 on success, 1 if end mark is found, -1 on failure */ static int wpa_parse_vendor_specific(const u8 *pos, const u8 *end, struct wpa_eapol_ie_parse *ie) { unsigned int oui; if (pos[1] < 4) { wpa_printf(MSG_MSGDUMP, "Too short vendor specific IE ignored (len=%u)", pos[1]); return 1; } oui = WPA_GET_BE24(&pos[2]); if (oui == OUI_MICROSOFT && pos[5] == WMM_OUI_TYPE && pos[1] > 4) { if (pos[6] == WMM_OUI_SUBTYPE_INFORMATION_ELEMENT) { ie->wmm = &pos[2]; ie->wmm_len = pos[1]; wpa_hexdump(MSG_DEBUG, "WPA: WMM IE", ie->wmm, ie->wmm_len); } else if (pos[6] == WMM_OUI_SUBTYPE_PARAMETER_ELEMENT) { ie->wmm = &pos[2]; ie->wmm_len = pos[1]; wpa_hexdump(MSG_DEBUG, "WPA: WMM Parameter Element", ie->wmm, ie->wmm_len); } } return 0; } /** * wpa_parse_generic - Parse EAPOL-Key Key Data Generic IEs * @pos: Pointer to the IE header * @end: Pointer to the end of the Key Data buffer * @ie: Pointer to parsed IE data * Returns: 0 on success, 1 if end mark is found, -1 on failure */ static int wpa_parse_generic(const u8 *pos, const u8 *end, struct wpa_eapol_ie_parse *ie) { if (pos[1] == 0) return 1; if (pos[1] >= 6 && RSN_SELECTOR_GET(pos + 2) == WPA_OUI_TYPE && pos[2 + WPA_SELECTOR_LEN] == 1 && pos[2 + WPA_SELECTOR_LEN + 1] == 0) { ie->wpa_ie = pos; ie->wpa_ie_len = pos[1] + 2; wpa_hexdump(MSG_DEBUG, "WPA: WPA IE in EAPOL-Key", ie->wpa_ie, ie->wpa_ie_len); return 0; } if (pos[1] >= 4 && WPA_GET_BE32(pos + 2) == OSEN_IE_VENDOR_TYPE) { ie->osen = pos; ie->osen_len = pos[1] + 2; return 0; } if (1 + RSN_SELECTOR_LEN < end - pos && pos[1] >= RSN_SELECTOR_LEN + PMKID_LEN && RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_PMKID) { ie->pmkid = pos + 2 + RSN_SELECTOR_LEN; wpa_hexdump(MSG_DEBUG, "WPA: PMKID in EAPOL-Key", pos, pos[1] + 2); return 0; } if (pos[1] >= RSN_SELECTOR_LEN + 2 && RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_KEYID) { ie->key_id = pos + 2 + RSN_SELECTOR_LEN; wpa_hexdump(MSG_DEBUG, "WPA: KeyID in EAPOL-Key", pos, pos[1] + 2); return 0; } if (pos[1] > RSN_SELECTOR_LEN + 2 && RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_GROUPKEY) { ie->gtk = pos + 2 + RSN_SELECTOR_LEN; ie->gtk_len = pos[1] - RSN_SELECTOR_LEN; wpa_hexdump_key(MSG_DEBUG, "WPA: GTK in EAPOL-Key", pos, pos[1] + 2); return 0; } if (pos[1] > RSN_SELECTOR_LEN + 2 && RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_MAC_ADDR) { ie->mac_addr = pos + 2 + RSN_SELECTOR_LEN; ie->mac_addr_len = pos[1] - RSN_SELECTOR_LEN; wpa_hexdump(MSG_DEBUG, "WPA: MAC Address in EAPOL-Key", pos, pos[1] + 2); return 0; } if (pos[1] > RSN_SELECTOR_LEN + 2 && RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_IGTK) { ie->igtk = pos + 2 + RSN_SELECTOR_LEN; ie->igtk_len = pos[1] - RSN_SELECTOR_LEN; wpa_hexdump_key(MSG_DEBUG, "WPA: IGTK in EAPOL-Key", pos, pos[1] + 2); return 0; } if (pos[1] > RSN_SELECTOR_LEN + 2 && RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_BIGTK) { ie->bigtk = pos + 2 + RSN_SELECTOR_LEN; ie->bigtk_len = pos[1] - RSN_SELECTOR_LEN; wpa_hexdump_key(MSG_DEBUG, "WPA: BIGTK in EAPOL-Key", pos, pos[1] + 2); return 0; } if (pos[1] >= RSN_SELECTOR_LEN + 1 && RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_REQ) { ie->ip_addr_req = pos + 2 + RSN_SELECTOR_LEN; wpa_hexdump(MSG_DEBUG, "WPA: IP Address Request in EAPOL-Key", ie->ip_addr_req, pos[1] - RSN_SELECTOR_LEN); return 0; } if (pos[1] >= RSN_SELECTOR_LEN + 3 * 4 && RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_IP_ADDR_ALLOC) { ie->ip_addr_alloc = pos + 2 + RSN_SELECTOR_LEN; wpa_hexdump(MSG_DEBUG, "WPA: IP Address Allocation in EAPOL-Key", ie->ip_addr_alloc, pos[1] - RSN_SELECTOR_LEN); return 0; } if (pos[1] > RSN_SELECTOR_LEN + 2 && RSN_SELECTOR_GET(pos + 2) == RSN_KEY_DATA_OCI) { ie->oci = pos + 2 + RSN_SELECTOR_LEN; ie->oci_len = pos[1] - RSN_SELECTOR_LEN; wpa_hexdump(MSG_DEBUG, "WPA: OCI KDE in EAPOL-Key", pos, pos[1] + 2); return 0; } return 0; } /** * wpa_parse_kde_ies - Parse EAPOL-Key Key Data IEs * @buf: Pointer to the Key Data buffer * @len: Key Data Length * @ie: Pointer to parsed IE data * Returns: 0 on success, -1 on failure */ int wpa_parse_kde_ies(const u8 *buf, size_t len, struct wpa_eapol_ie_parse *ie) { const u8 *pos, *end; int ret = 0; os_memset(ie, 0, sizeof(*ie)); for (pos = buf, end = pos + len; end - pos > 1; pos += 2 + pos[1]) { if (pos[0] == 0xdd && ((pos == buf + len - 1) || pos[1] == 0)) { /* Ignore padding */ break; } if (2 + pos[1] > end - pos) { wpa_printf(MSG_DEBUG, "WPA: EAPOL-Key Key Data underflow (ie=%d len=%d pos=%d)", pos[0], pos[1], (int) (pos - buf)); wpa_hexdump_key(MSG_DEBUG, "WPA: Key Data", buf, len); ret = -1; break; } if (*pos == WLAN_EID_RSN) { ie->rsn_ie = pos; ie->rsn_ie_len = pos[1] + 2; wpa_hexdump(MSG_DEBUG, "WPA: RSN IE in EAPOL-Key", ie->rsn_ie, ie->rsn_ie_len); } else if (*pos == WLAN_EID_RSNX) { ie->rsnxe = pos; ie->rsnxe_len = pos[1] + 2; wpa_hexdump(MSG_DEBUG, "WPA: RSNXE in EAPOL-Key", ie->rsnxe, ie->rsnxe_len); } else if (*pos == WLAN_EID_MOBILITY_DOMAIN) { ie->mdie = pos; ie->mdie_len = pos[1] + 2; wpa_hexdump(MSG_DEBUG, "WPA: MDIE in EAPOL-Key", ie->mdie, ie->mdie_len); } else if (*pos == WLAN_EID_FAST_BSS_TRANSITION) { ie->ftie = pos; ie->ftie_len = pos[1] + 2; wpa_hexdump(MSG_DEBUG, "WPA: FTIE in EAPOL-Key", ie->ftie, ie->ftie_len); } else if (*pos == WLAN_EID_TIMEOUT_INTERVAL && pos[1] >= 5) { if (pos[2] == WLAN_TIMEOUT_REASSOC_DEADLINE) { ie->reassoc_deadline = pos; wpa_hexdump(MSG_DEBUG, "WPA: Reassoc Deadline " "in EAPOL-Key", ie->reassoc_deadline, pos[1] + 2); } else if (pos[2] == WLAN_TIMEOUT_KEY_LIFETIME) { ie->key_lifetime = pos; wpa_hexdump(MSG_DEBUG, "WPA: KeyLifetime " "in EAPOL-Key", ie->key_lifetime, pos[1] + 2); } else { wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized " "EAPOL-Key Key Data IE", pos, 2 + pos[1]); } } else if (*pos == WLAN_EID_LINK_ID) { if (pos[1] >= 18) { ie->lnkid = pos; ie->lnkid_len = pos[1] + 2; } } else if (*pos == WLAN_EID_EXT_CAPAB) { ie->ext_capab = pos; ie->ext_capab_len = pos[1] + 2; } else if (*pos == WLAN_EID_SUPP_RATES) { ie->supp_rates = pos; ie->supp_rates_len = pos[1] + 2; } else if (*pos == WLAN_EID_EXT_SUPP_RATES) { ie->ext_supp_rates = pos; ie->ext_supp_rates_len = pos[1] + 2; } else if (*pos == WLAN_EID_HT_CAP && pos[1] >= sizeof(struct ieee80211_ht_capabilities)) { ie->ht_capabilities = pos + 2; } else if (*pos == WLAN_EID_VHT_AID) { if (pos[1] >= 2) ie->aid = WPA_GET_LE16(pos + 2) & 0x3fff; } else if (*pos == WLAN_EID_VHT_CAP && pos[1] >= sizeof(struct ieee80211_vht_capabilities)) { ie->vht_capabilities = pos + 2; } else if (*pos == WLAN_EID_QOS && pos[1] >= 1) { ie->qosinfo = pos[2]; } else if (*pos == WLAN_EID_SUPPORTED_CHANNELS) { ie->supp_channels = pos + 2; ie->supp_channels_len = pos[1]; } else if (*pos == WLAN_EID_SUPPORTED_OPERATING_CLASSES) { /* * The value of the Length field of the Supported * Operating Classes element is between 2 and 253. * Silently skip invalid elements to avoid interop * issues when trying to use the value. */ if (pos[1] >= 2 && pos[1] <= 253) { ie->supp_oper_classes = pos + 2; ie->supp_oper_classes_len = pos[1]; } } else if (*pos == WLAN_EID_VENDOR_SPECIFIC) { ret = wpa_parse_generic(pos, end, ie); if (ret < 0) break; if (ret > 0) { ret = 0; break; } ret = wpa_parse_vendor_specific(pos, end, ie); if (ret < 0) break; if (ret > 0) { ret = 0; break; } } else { wpa_hexdump(MSG_DEBUG, "WPA: Unrecognized EAPOL-Key Key Data IE", pos, 2 + pos[1]); } } return ret; }