jeltz/hostap
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity
hostap/src/common/wpa_common.c
Jouni Malinen 9d1857cf35 Process Transition Disable KDE in station mode 
Check whether the Transition Disable KDE is received from an
authenticated AP and if so, whether it contains valid indication for
disabling a transition mode. If that is the case, update the local
network profile by removing the less secure options.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
2020-03-26 00:13:14 +02:00

2928 lines
78 KiB
C
Raw Blame History

/*
* WPA/RSN - Shared functions for supplicant and authenticator
* Copyright (c) 2002-2018, 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/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
* @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, 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 (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;
}
if (pos[1] >= RSN_SELECTOR_LEN + 1 &&
RSN_SELECTOR_GET(pos + 2) == WFA_KEY_DATA_TRANSITION_DISABLE) {
ie->transition_disable = pos + 2 + RSN_SELECTOR_LEN;
ie->transition_disable_len = pos[1] - RSN_SELECTOR_LEN;
wpa_hexdump(MSG_DEBUG,
"WPA: Transition Disable 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, 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;
}
Reference in a new issue View git blame Copy permalink