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hostapd/src/common/wpa_common.c
Jouni Malinen 4848a38d85 Get rid of duplicated cipher suite and AKM definitions 
WPA_CIPHER_* and CIPHER_* are used for the exact same set of cipher
suites with the main difference being that the WPA_CIPHER_* version is
suitable to be used as a bitfield. Similarly, WPA_KEY_MGMT_* and
KEY_MGMT_* have similar design for AKMs. There is no need to maintain
two separate copies of the definitions since the bitfield compatible
version can be used for both needs. Get rid of the CIPHER_* and
KEY_MGMT_* versions to clean up the implementation by getting rid of
unnecessary mapping functions.

Signed-hostap: Jouni Malinen <j@w1.fi>
2013-12-31 09:16:27 +02:00

1436 lines
36 KiB
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/*
* WPA/RSN - Shared functions for supplicant and authenticator
* Copyright (c) 2002-2013, 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/aes_wrap.h"
#include "crypto/crypto.h"
#include "ieee802_11_defs.h"
#include "defs.h"
#include "wpa_common.h"
/**
* wpa_eapol_key_mic - Calculate EAPOL-Key MIC
* @key: EAPOL-Key Key Confirmation Key (KCK)
* @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, int ver, const u8 *buf, size_t len,
u8 *mic)
{
u8 hash[SHA1_MAC_LEN];
switch (ver) {
#ifndef CONFIG_FIPS
case WPA_KEY_INFO_TYPE_HMAC_MD5_RC4:
return hmac_md5(key, 16, buf, len, mic);
#endif /* CONFIG_FIPS */
case WPA_KEY_INFO_TYPE_HMAC_SHA1_AES:
if (hmac_sha1(key, 16, buf, len, hash))
return -1;
os_memcpy(mic, hash, MD5_MAC_LEN);
break;
#if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W)
case WPA_KEY_INFO_TYPE_AES_128_CMAC:
return omac1_aes_128(key, buf, len, mic);
#endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */
default:
return -1;
}
return 0;
}
/**
* wpa_pmk_to_ptk - Calculate PTK from PMK, addresses, and nonces
* @pmk: Pairwise master key
* @pmk_len: Length of PMK
* @label: Label to use in derivation
* @addr1: AA or SA
* @addr2: SA or AA
* @nonce1: ANonce or SNonce
* @nonce2: SNonce or ANonce
* @ptk: Buffer for pairwise transient key
* @ptk_len: Length of PTK
* @use_sha256: Whether to use SHA256-based KDF
*
* IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
* PTK = PRF-X(PMK, "Pairwise key expansion",
* Min(AA, SA) || Max(AA, SA) ||
* Min(ANonce, SNonce) || Max(ANonce, SNonce))
*
* STK = PRF-X(SMK, "Peer key expansion",
* Min(MAC_I, MAC_P) || Max(MAC_I, MAC_P) ||
* Min(INonce, PNonce) || Max(INonce, PNonce))
*/
void 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,
u8 *ptk, size_t ptk_len, int use_sha256)
{
u8 data[2 * ETH_ALEN + 2 * WPA_NONCE_LEN];
if (os_memcmp(addr1, addr2, ETH_ALEN) < 0) {
os_memcpy(data, addr1, ETH_ALEN);
os_memcpy(data + ETH_ALEN, addr2, ETH_ALEN);
} else {
os_memcpy(data, addr2, ETH_ALEN);
os_memcpy(data + ETH_ALEN, addr1, ETH_ALEN);
}
if (os_memcmp(nonce1, nonce2, WPA_NONCE_LEN) < 0) {
os_memcpy(data + 2 * ETH_ALEN, nonce1, WPA_NONCE_LEN);
os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce2,
WPA_NONCE_LEN);
} else {
os_memcpy(data + 2 * ETH_ALEN, nonce2, WPA_NONCE_LEN);
os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce1,
WPA_NONCE_LEN);
}
#ifdef CONFIG_IEEE80211W
if (use_sha256)
sha256_prf(pmk, pmk_len, label, data, sizeof(data),
ptk, ptk_len);
else
#endif /* CONFIG_IEEE80211W */
sha1_prf(pmk, pmk_len, label, data, sizeof(data), ptk,
ptk_len);
wpa_printf(MSG_DEBUG, "WPA: PTK derivation - A1=" MACSTR " A2=" MACSTR,
MAC2STR(addr1), MAC2STR(addr2));
wpa_hexdump(MSG_DEBUG, "WPA: Nonce1", nonce1, WPA_NONCE_LEN);
wpa_hexdump(MSG_DEBUG, "WPA: Nonce2", nonce2, WPA_NONCE_LEN);
wpa_hexdump_key(MSG_DEBUG, "WPA: PMK", pmk, pmk_len);
wpa_hexdump_key(MSG_DEBUG, "WPA: PTK", ptk, ptk_len);
}
#ifdef CONFIG_IEEE80211R
int wpa_ft_mic(const u8 *kck, const u8 *sta_addr, const u8 *ap_addr,
u8 transaction_seqnum, const u8 *mdie, size_t mdie_len,
const u8 *ftie, size_t ftie_len,
const u8 *rsnie, size_t rsnie_len,
const u8 *ric, size_t ric_len, u8 *mic)
{
u8 *buf, *pos;
size_t buf_len;
buf_len = 2 * ETH_ALEN + 1 + mdie_len + ftie_len + rsnie_len + ric_len;
buf = os_malloc(buf_len);
if (buf == NULL)
return -1;
pos = buf;
os_memcpy(pos, sta_addr, ETH_ALEN);
pos += ETH_ALEN;
os_memcpy(pos, ap_addr, ETH_ALEN);
pos += ETH_ALEN;
*pos++ = transaction_seqnum;
if (rsnie) {
os_memcpy(pos, rsnie, rsnie_len);
pos += rsnie_len;
}
if (mdie) {
os_memcpy(pos, mdie, mdie_len);
pos += mdie_len;
}
if (ftie) {
struct rsn_ftie *_ftie;
os_memcpy(pos, ftie, ftie_len);
if (ftie_len < 2 + sizeof(*_ftie)) {
os_free(buf);
return -1;
}
_ftie = (struct rsn_ftie *) (pos + 2);
os_memset(_ftie->mic, 0, sizeof(_ftie->mic));
pos += ftie_len;
}
if (ric) {
os_memcpy(pos, ric, ric_len);
pos += ric_len;
}
wpa_hexdump(MSG_MSGDUMP, "FT: MIC data", buf, pos - buf);
if (omac1_aes_128(kck, buf, pos - buf, mic)) {
os_free(buf);
return -1;
}
os_free(buf);
return 0;
}
static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len,
struct wpa_ft_ies *parse)
{
const u8 *end, *pos;
parse->ftie = ie;
parse->ftie_len = ie_len;
pos = ie + sizeof(struct rsn_ftie);
end = ie + ie_len;
while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
switch (pos[0]) {
case FTIE_SUBELEM_R1KH_ID:
if (pos[1] != FT_R1KH_ID_LEN) {
wpa_printf(MSG_DEBUG, "FT: Invalid R1KH-ID "
"length in FTIE: %d", pos[1]);
return -1;
}
parse->r1kh_id = pos + 2;
break;
case FTIE_SUBELEM_GTK:
parse->gtk = pos + 2;
parse->gtk_len = pos[1];
break;
case FTIE_SUBELEM_R0KH_ID:
if (pos[1] < 1 || pos[1] > FT_R0KH_ID_MAX_LEN) {
wpa_printf(MSG_DEBUG, "FT: Invalid R0KH-ID "
"length in FTIE: %d", pos[1]);
return -1;
}
parse->r0kh_id = pos + 2;
parse->r0kh_id_len = pos[1];
break;
#ifdef CONFIG_IEEE80211W
case FTIE_SUBELEM_IGTK:
parse->igtk = pos + 2;
parse->igtk_len = pos[1];
break;
#endif /* CONFIG_IEEE80211W */
}
pos += 2 + pos[1];
}
return 0;
}
int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
struct wpa_ft_ies *parse)
{
const u8 *end, *pos;
struct wpa_ie_data data;
int ret;
const struct rsn_ftie *ftie;
int prot_ie_count = 0;
os_memset(parse, 0, sizeof(*parse));
if (ies == NULL)
return 0;
pos = ies;
end = ies + ies_len;
while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
switch (pos[0]) {
case WLAN_EID_RSN:
parse->rsn = pos + 2;
parse->rsn_len = pos[1];
ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2,
parse->rsn_len + 2,
&data);
if (ret < 0) {
wpa_printf(MSG_DEBUG, "FT: Failed to parse "
"RSN IE: %d", ret);
return -1;
}
if (data.num_pmkid == 1 && data.pmkid)
parse->rsn_pmkid = data.pmkid;
break;
case WLAN_EID_MOBILITY_DOMAIN:
parse->mdie = pos + 2;
parse->mdie_len = pos[1];
break;
case WLAN_EID_FAST_BSS_TRANSITION:
if (pos[1] < sizeof(*ftie))
return -1;
ftie = (const struct rsn_ftie *) (pos + 2);
prot_ie_count = ftie->mic_control[1];
if (wpa_ft_parse_ftie(pos + 2, pos[1], parse) < 0)
return -1;
break;
case WLAN_EID_TIMEOUT_INTERVAL:
parse->tie = pos + 2;
parse->tie_len = pos[1];
break;
case WLAN_EID_RIC_DATA:
if (parse->ric == NULL)
parse->ric = pos;
break;
}
pos += 2 + pos[1];
}
if (prot_ie_count == 0)
return 0; /* no MIC */
/*
* Check that the protected IE count matches with IEs included in the
* frame.
*/
if (parse->rsn)
prot_ie_count--;
if (parse->mdie)
prot_ie_count--;
if (parse->ftie)
prot_ie_count--;
if (prot_ie_count < 0) {
wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in "
"the protected IE count");
return -1;
}
if (prot_ie_count == 0 && parse->ric) {
wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not "
"included in protected IE count");
return -1;
}
/* Determine the end of the RIC IE(s) */
pos = parse->ric;
while (pos && pos + 2 <= end && pos + 2 + pos[1] <= end &&
prot_ie_count) {
prot_ie_count--;
pos += 2 + pos[1];
}
parse->ric_len = pos - parse->ric;
if (prot_ie_count) {
wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from "
"frame", (int) prot_ie_count);
return -1;
}
return 0;
}
#endif /* CONFIG_IEEE80211R */
static int rsn_selector_to_bitfield(const u8 *s)
{
if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NONE)
return WPA_CIPHER_NONE;
if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_WEP40)
return WPA_CIPHER_WEP40;
if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_TKIP)
return WPA_CIPHER_TKIP;
if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP)
return WPA_CIPHER_CCMP;
if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_WEP104)
return WPA_CIPHER_WEP104;
#ifdef CONFIG_IEEE80211W
if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_AES_128_CMAC)
return WPA_CIPHER_AES_128_CMAC;
#endif /* CONFIG_IEEE80211W */
if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP)
return WPA_CIPHER_GCMP;
if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP_256)
return WPA_CIPHER_CCMP_256;
if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_GCMP_256)
return WPA_CIPHER_GCMP_256;
if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_128)
return WPA_CIPHER_BIP_GMAC_128;
if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_GMAC_256)
return WPA_CIPHER_BIP_GMAC_256;
if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_BIP_CMAC_256)
return WPA_CIPHER_BIP_CMAC_256;
return 0;
}
static int rsn_key_mgmt_to_bitfield(const u8 *s)
{
if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_UNSPEC_802_1X)
return WPA_KEY_MGMT_IEEE8021X;
if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X)
return WPA_KEY_MGMT_PSK;
#ifdef CONFIG_IEEE80211R
if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X)
return WPA_KEY_MGMT_FT_IEEE8021X;
if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_PSK)
return WPA_KEY_MGMT_FT_PSK;
#endif /* CONFIG_IEEE80211R */
#ifdef CONFIG_IEEE80211W
if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SHA256)
return WPA_KEY_MGMT_IEEE8021X_SHA256;
if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_SHA256)
return WPA_KEY_MGMT_PSK_SHA256;
#endif /* CONFIG_IEEE80211W */
#ifdef CONFIG_SAE
if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_SAE)
return WPA_KEY_MGMT_SAE;
if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_SAE)
return WPA_KEY_MGMT_FT_SAE;
#endif /* CONFIG_SAE */
return 0;
}
/**
* 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 struct rsn_ie_hdr *hdr;
const u8 *pos;
int left;
int i, count;
os_memset(data, 0, sizeof(*data));
data->proto = WPA_PROTO_RSN;
data->pairwise_cipher = WPA_CIPHER_CCMP;
data->group_cipher = WPA_CIPHER_CCMP;
data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
data->capabilities = 0;
data->pmkid = NULL;
data->num_pmkid = 0;
#ifdef CONFIG_IEEE80211W
data->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
#else /* CONFIG_IEEE80211W */
data->mgmt_group_cipher = 0;
#endif /* CONFIG_IEEE80211W */
if (rsn_ie_len == 0) {
/* No RSN IE - fail silently */
return -1;
}
if (rsn_ie_len < sizeof(struct rsn_ie_hdr)) {
wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
__func__, (unsigned long) rsn_ie_len);
return -1;
}
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);
#ifdef CONFIG_IEEE80211W
if (data->group_cipher == WPA_CIPHER_AES_128_CMAC) {
wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as group "
"cipher", __func__);
return -1;
}
#endif /* CONFIG_IEEE80211W */
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 || left < count * RSN_SELECTOR_LEN) {
wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), "
"count %u left %u", __func__, count, left);
return -4;
}
for (i = 0; i < count; i++) {
data->pairwise_cipher |= rsn_selector_to_bitfield(pos);
pos += RSN_SELECTOR_LEN;
left -= RSN_SELECTOR_LEN;
}
#ifdef CONFIG_IEEE80211W
if (data->pairwise_cipher & WPA_CIPHER_AES_128_CMAC) {
wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as "
"pairwise cipher", __func__);
return -1;
}
#endif /* CONFIG_IEEE80211W */
} else if (left == 1) {
wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)",
__func__);
return -5;
}
if (left >= 2) {
data->key_mgmt = 0;
count = WPA_GET_LE16(pos);
pos += 2;
left -= 2;
if (count == 0 || left < count * 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) {
data->num_pmkid = WPA_GET_LE16(pos);
pos += 2;
left -= 2;
if (left < (int) data->num_pmkid * PMKID_LEN) {
wpa_printf(MSG_DEBUG, "%s: PMKID underflow "
"(num_pmkid=%lu left=%d)",
__func__, (unsigned long) data->num_pmkid,
left);
data->num_pmkid = 0;
return -9;
} else {
data->pmkid = pos;
pos += data->num_pmkid * PMKID_LEN;
left -= data->num_pmkid * PMKID_LEN;
}
}
#ifdef CONFIG_IEEE80211W
if (left >= 4) {
data->mgmt_group_cipher = rsn_selector_to_bitfield(pos);
if (data->mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC) {
wpa_printf(MSG_DEBUG, "%s: Unsupported management "
"group cipher 0x%x", __func__,
data->mgmt_group_cipher);
return -10;
}
pos += RSN_SELECTOR_LEN;
left -= RSN_SELECTOR_LEN;
}
#endif /* CONFIG_IEEE80211W */
if (left > 0) {
wpa_printf(MSG_DEBUG, "%s: ie has %u trailing bytes - ignored",
__func__, left);
}
return 0;
}
static int wpa_selector_to_bitfield(const u8 *s)
{
if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_NONE)
return WPA_CIPHER_NONE;
if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP40)
return WPA_CIPHER_WEP40;
if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_TKIP)
return WPA_CIPHER_TKIP;
if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_CCMP)
return WPA_CIPHER_CCMP;
if (RSN_SELECTOR_GET(s) == WPA_CIPHER_SUITE_WEP104)
return WPA_CIPHER_WEP104;
return 0;
}
static int wpa_key_mgmt_to_bitfield(const u8 *s)
{
if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_UNSPEC_802_1X)
return WPA_KEY_MGMT_IEEE8021X;
if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X)
return WPA_KEY_MGMT_PSK;
if (RSN_SELECTOR_GET(s) == WPA_AUTH_KEY_MGMT_NONE)
return WPA_KEY_MGMT_WPA_NONE;
return 0;
}
int wpa_parse_wpa_ie_wpa(const u8 *wpa_ie, size_t wpa_ie_len,
struct wpa_ie_data *data)
{
const struct wpa_ie_hdr *hdr;
const u8 *pos;
int left;
int i, count;
os_memset(data, 0, sizeof(*data));
data->proto = WPA_PROTO_WPA;
data->pairwise_cipher = WPA_CIPHER_TKIP;
data->group_cipher = WPA_CIPHER_TKIP;
data->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
data->capabilities = 0;
data->pmkid = NULL;
data->num_pmkid = 0;
data->mgmt_group_cipher = 0;
if (wpa_ie_len == 0) {
/* No WPA IE - fail silently */
return -1;
}
if (wpa_ie_len < sizeof(struct wpa_ie_hdr)) {
wpa_printf(MSG_DEBUG, "%s: ie len too short %lu",
__func__, (unsigned long) wpa_ie_len);
return -1;
}
hdr = (const struct wpa_ie_hdr *) wpa_ie;
if (hdr->elem_id != WLAN_EID_VENDOR_SPECIFIC ||
hdr->len != wpa_ie_len - 2 ||
RSN_SELECTOR_GET(hdr->oui) != WPA_OUI_TYPE ||
WPA_GET_LE16(hdr->version) != WPA_VERSION) {
wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version",
__func__);
return -2;
}
pos = (const u8 *) (hdr + 1);
left = wpa_ie_len - sizeof(*hdr);
if (left >= WPA_SELECTOR_LEN) {
data->group_cipher = wpa_selector_to_bitfield(pos);
pos += WPA_SELECTOR_LEN;
left -= WPA_SELECTOR_LEN;
} else if (left > 0) {
wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much",
__func__, left);
return -3;
}
if (left >= 2) {
data->pairwise_cipher = 0;
count = WPA_GET_LE16(pos);
pos += 2;
left -= 2;
if (count == 0 || left < count * 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 || left < count * 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_printf(MSG_DEBUG, "%s: ie has %u trailing bytes - ignored",
__func__, left);
}
return 0;
}
#ifdef CONFIG_IEEE80211R
/**
* wpa_derive_pmk_r0 - Derive PMK-R0 and PMKR0Name
*
* IEEE Std 802.11r-2008 - 8.5.1.5.3
*/
void wpa_derive_pmk_r0(const u8 *xxkey, size_t xxkey_len,
const u8 *ssid, size_t ssid_len,
const u8 *mdid, const u8 *r0kh_id, size_t r0kh_id_len,
const u8 *s0kh_id, u8 *pmk_r0, u8 *pmk_r0_name)
{
u8 buf[1 + WPA_MAX_SSID_LEN + MOBILITY_DOMAIN_ID_LEN + 1 +
FT_R0KH_ID_MAX_LEN + ETH_ALEN];
u8 *pos, r0_key_data[48], hash[32];
const u8 *addr[2];
size_t len[2];
/*
* R0-Key-Data = KDF-384(XXKey, "FT-R0",
* SSIDlength || SSID || MDID || R0KHlength ||
* R0KH-ID || S0KH-ID)
* XXKey is either the second 256 bits of MSK or PSK.
* PMK-R0 = L(R0-Key-Data, 0, 256)
* PMK-R0Name-Salt = L(R0-Key-Data, 256, 128)
*/
if (ssid_len > WPA_MAX_SSID_LEN || r0kh_id_len > FT_R0KH_ID_MAX_LEN)
return;
pos = buf;
*pos++ = ssid_len;
os_memcpy(pos, ssid, ssid_len);
pos += ssid_len;
os_memcpy(pos, mdid, MOBILITY_DOMAIN_ID_LEN);
pos += MOBILITY_DOMAIN_ID_LEN;
*pos++ = r0kh_id_len;
os_memcpy(pos, r0kh_id, r0kh_id_len);
pos += r0kh_id_len;
os_memcpy(pos, s0kh_id, ETH_ALEN);
pos += ETH_ALEN;
sha256_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf,
r0_key_data, sizeof(r0_key_data));
os_memcpy(pmk_r0, r0_key_data, PMK_LEN);
/*
* PMKR0Name = Truncate-128(SHA-256("FT-R0N" || PMK-R0Name-Salt)
*/
addr[0] = (const u8 *) "FT-R0N";
len[0] = 6;
addr[1] = r0_key_data + PMK_LEN;
len[1] = 16;
sha256_vector(2, addr, len, hash);
os_memcpy(pmk_r0_name, hash, WPA_PMK_NAME_LEN);
}
/**
* wpa_derive_pmk_r1_name - Derive PMKR1Name
*
* IEEE Std 802.11r-2008 - 8.5.1.5.4
*/
void wpa_derive_pmk_r1_name(const u8 *pmk_r0_name, const u8 *r1kh_id,
const u8 *s1kh_id, u8 *pmk_r1_name)
{
u8 hash[32];
const u8 *addr[4];
size_t len[4];
/*
* PMKR1Name = Truncate-128(SHA-256("FT-R1N" || PMKR0Name ||
* R1KH-ID || S1KH-ID))
*/
addr[0] = (const u8 *) "FT-R1N";
len[0] = 6;
addr[1] = pmk_r0_name;
len[1] = WPA_PMK_NAME_LEN;
addr[2] = r1kh_id;
len[2] = FT_R1KH_ID_LEN;
addr[3] = s1kh_id;
len[3] = ETH_ALEN;
sha256_vector(4, addr, len, hash);
os_memcpy(pmk_r1_name, hash, WPA_PMK_NAME_LEN);
}
/**
* wpa_derive_pmk_r1 - Derive PMK-R1 and PMKR1Name from PMK-R0
*
* IEEE Std 802.11r-2008 - 8.5.1.5.4
*/
void wpa_derive_pmk_r1(const u8 *pmk_r0, const u8 *pmk_r0_name,
const u8 *r1kh_id, const u8 *s1kh_id,
u8 *pmk_r1, u8 *pmk_r1_name)
{
u8 buf[FT_R1KH_ID_LEN + ETH_ALEN];
u8 *pos;
/* PMK-R1 = KDF-256(PMK-R0, "FT-R1", R1KH-ID || S1KH-ID) */
pos = buf;
os_memcpy(pos, r1kh_id, FT_R1KH_ID_LEN);
pos += FT_R1KH_ID_LEN;
os_memcpy(pos, s1kh_id, ETH_ALEN);
pos += ETH_ALEN;
sha256_prf(pmk_r0, PMK_LEN, "FT-R1", buf, pos - buf, pmk_r1, PMK_LEN);
wpa_derive_pmk_r1_name(pmk_r0_name, r1kh_id, s1kh_id, pmk_r1_name);
}
/**
* wpa_pmk_r1_to_ptk - Derive PTK and PTKName from PMK-R1
*
* IEEE Std 802.11r-2008 - 8.5.1.5.5
*/
void wpa_pmk_r1_to_ptk(const u8 *pmk_r1, const u8 *snonce, const u8 *anonce,
const u8 *sta_addr, const u8 *bssid,
const u8 *pmk_r1_name,
u8 *ptk, size_t ptk_len, u8 *ptk_name)
{
u8 buf[2 * WPA_NONCE_LEN + 2 * ETH_ALEN];
u8 *pos, hash[32];
const u8 *addr[6];
size_t len[6];
/*
* PTK = KDF-PTKLen(PMK-R1, "FT-PTK", SNonce || ANonce ||
* BSSID || STA-ADDR)
*/
pos = buf;
os_memcpy(pos, snonce, WPA_NONCE_LEN);
pos += WPA_NONCE_LEN;
os_memcpy(pos, anonce, WPA_NONCE_LEN);
pos += WPA_NONCE_LEN;
os_memcpy(pos, bssid, ETH_ALEN);
pos += ETH_ALEN;
os_memcpy(pos, sta_addr, ETH_ALEN);
pos += ETH_ALEN;
sha256_prf(pmk_r1, PMK_LEN, "FT-PTK", buf, pos - buf, ptk, ptk_len);
/*
* PTKName = Truncate-128(SHA-256(PMKR1Name || "FT-PTKN" || SNonce ||
* ANonce || BSSID || STA-ADDR))
*/
addr[0] = pmk_r1_name;
len[0] = WPA_PMK_NAME_LEN;
addr[1] = (const u8 *) "FT-PTKN";
len[1] = 7;
addr[2] = snonce;
len[2] = WPA_NONCE_LEN;
addr[3] = anonce;
len[3] = WPA_NONCE_LEN;
addr[4] = bssid;
len[4] = ETH_ALEN;
addr[5] = sta_addr;
len[5] = ETH_ALEN;
sha256_vector(6, addr, len, hash);
os_memcpy(ptk_name, hash, WPA_PMK_NAME_LEN);
}
#endif /* CONFIG_IEEE80211R */
/**
* rsn_pmkid - Calculate PMK identifier
* @pmk: Pairwise master key
* @pmk_len: Length of pmk in bytes
* @aa: Authenticator address
* @spa: Supplicant address
* @pmkid: Buffer for PMKID
* @use_sha256: Whether to use SHA256-based KDF
*
* IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
* PMKID = HMAC-SHA1-128(PMK, "PMK Name" || AA || SPA)
*/
void rsn_pmkid(const u8 *pmk, size_t pmk_len, const u8 *aa, const u8 *spa,
u8 *pmkid, int use_sha256)
{
char *title = "PMK Name";
const u8 *addr[3];
const size_t len[3] = { 8, ETH_ALEN, ETH_ALEN };
unsigned char hash[SHA256_MAC_LEN];
addr[0] = (u8 *) title;
addr[1] = aa;
addr[2] = spa;
#ifdef CONFIG_IEEE80211W
if (use_sha256)
hmac_sha256_vector(pmk, pmk_len, 3, addr, len, hash);
else
#endif /* CONFIG_IEEE80211W */
hmac_sha1_vector(pmk, pmk_len, 3, addr, len, hash);
os_memcpy(pmkid, hash, PMKID_LEN);
}
/**
* wpa_cipher_txt - Convert cipher suite to a text string
* @cipher: Cipher suite (WPA_CIPHER_* enum)
* Returns: Pointer to a text string of the cipher suite name
*/
const char * wpa_cipher_txt(int cipher)
{
switch (cipher) {
case WPA_CIPHER_NONE:
return "NONE";
case WPA_CIPHER_WEP40:
return "WEP-40";
case WPA_CIPHER_WEP104:
return "WEP-104";
case WPA_CIPHER_TKIP:
return "TKIP";
case WPA_CIPHER_CCMP:
return "CCMP";
case WPA_CIPHER_CCMP | WPA_CIPHER_TKIP:
return "CCMP+TKIP";
case WPA_CIPHER_GCMP:
return "GCMP";
case WPA_CIPHER_GCMP_256:
return "GCMP-256";
case WPA_CIPHER_CCMP_256:
return "CCMP-256";
case WPA_CIPHER_GTK_NOT_USED:
return "GTK_NOT_USED";
default:
return "UNKNOWN";
}
}
/**
* wpa_key_mgmt_txt - Convert key management suite to a text string
* @key_mgmt: Key management suite (WPA_KEY_MGMT_* enum)
* @proto: WPA/WPA2 version (WPA_PROTO_*)
* Returns: Pointer to a text string of the key management suite name
*/
const char * wpa_key_mgmt_txt(int key_mgmt, int proto)
{
switch (key_mgmt) {
case WPA_KEY_MGMT_IEEE8021X:
if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
return "WPA2+WPA/IEEE 802.1X/EAP";
return proto == WPA_PROTO_RSN ?
"WPA2/IEEE 802.1X/EAP" : "WPA/IEEE 802.1X/EAP";
case WPA_KEY_MGMT_PSK:
if (proto == (WPA_PROTO_RSN | WPA_PROTO_WPA))
return "WPA2-PSK+WPA-PSK";
return proto == WPA_PROTO_RSN ?
"WPA2-PSK" : "WPA-PSK";
case WPA_KEY_MGMT_NONE:
return "NONE";
case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
return "IEEE 802.1X (no WPA)";
#ifdef CONFIG_IEEE80211R
case WPA_KEY_MGMT_FT_IEEE8021X:
return "FT-EAP";
case WPA_KEY_MGMT_FT_PSK:
return "FT-PSK";
#endif /* CONFIG_IEEE80211R */
#ifdef CONFIG_IEEE80211W
case WPA_KEY_MGMT_IEEE8021X_SHA256:
return "WPA2-EAP-SHA256";
case WPA_KEY_MGMT_PSK_SHA256:
return "WPA2-PSK-SHA256";
#endif /* CONFIG_IEEE80211W */
default:
return "UNKNOWN";
}
}
int wpa_compare_rsn_ie(int ft_initial_assoc,
const u8 *ie1, size_t ie1len,
const u8 *ie2, size_t ie2len)
{
if (ie1 == NULL || ie2 == NULL)
return -1;
if (ie1len == ie2len && os_memcmp(ie1, ie2, ie1len) == 0)
return 0; /* identical IEs */
#ifdef CONFIG_IEEE80211R
if (ft_initial_assoc) {
struct wpa_ie_data ie1d, ie2d;
/*
* The PMKID-List in RSN IE is different between Beacon/Probe
* Response/(Re)Association Request frames and EAPOL-Key
* messages in FT initial mobility domain association. Allow
* for this, but verify that other parts of the RSN IEs are
* identical.
*/
if (wpa_parse_wpa_ie_rsn(ie1, ie1len, &ie1d) < 0 ||
wpa_parse_wpa_ie_rsn(ie2, ie2len, &ie2d) < 0)
return -1;
if (ie1d.proto == ie2d.proto &&
ie1d.pairwise_cipher == ie2d.pairwise_cipher &&
ie1d.group_cipher == ie2d.group_cipher &&
ie1d.key_mgmt == ie2d.key_mgmt &&
ie1d.capabilities == ie2d.capabilities &&
ie1d.mgmt_group_cipher == ie2d.mgmt_group_cipher)
return 0;
}
#endif /* CONFIG_IEEE80211R */
return -1;
}
#ifdef CONFIG_IEEE80211R
int wpa_insert_pmkid(u8 *ies, size_t ies_len, const u8 *pmkid)
{
u8 *start, *end, *rpos, *rend;
int added = 0;
start = ies;
end = ies + ies_len;
while (start < end) {
if (*start == WLAN_EID_RSN)
break;
start += 2 + start[1];
}
if (start >= end) {
wpa_printf(MSG_ERROR, "FT: Could not find RSN IE in "
"IEs data");
return -1;
}
wpa_hexdump(MSG_DEBUG, "FT: RSN IE before modification",
start, 2 + start[1]);
/* Find start of PMKID-Count */
rpos = start + 2;
rend = rpos + start[1];
/* Skip Version and Group Data Cipher Suite */
rpos += 2 + 4;
/* Skip Pairwise Cipher Suite Count and List */
rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
/* Skip AKM Suite Count and List */
rpos += 2 + WPA_GET_LE16(rpos) * RSN_SELECTOR_LEN;
if (rpos == rend) {
/* Add RSN Capabilities */
os_memmove(rpos + 2, rpos, end - rpos);
*rpos++ = 0;
*rpos++ = 0;
} else {
/* Skip RSN Capabilities */
rpos += 2;
if (rpos > rend) {
wpa_printf(MSG_ERROR, "FT: Could not parse RSN IE in "
"IEs data");
return -1;
}
}
if (rpos == rend) {
/* No PMKID-Count field included; add it */
os_memmove(rpos + 2 + PMKID_LEN, rpos, end - rpos);
WPA_PUT_LE16(rpos, 1);
rpos += 2;
os_memcpy(rpos, pmkid, PMKID_LEN);
added += 2 + PMKID_LEN;
start[1] += 2 + PMKID_LEN;
} else {
/* PMKID-Count was included; use it */
if (WPA_GET_LE16(rpos) != 0) {
wpa_printf(MSG_ERROR, "FT: Unexpected PMKID "
"in RSN IE in EAPOL-Key data");
return -1;
}
WPA_PUT_LE16(rpos, 1);
rpos += 2;
os_memmove(rpos + PMKID_LEN, rpos, end - rpos);
os_memcpy(rpos, pmkid, PMKID_LEN);
added += PMKID_LEN;
start[1] += PMKID_LEN;
}
wpa_hexdump(MSG_DEBUG, "FT: RSN IE after modification "
"(PMKID inserted)", start, 2 + start[1]);
return added;
}
#endif /* CONFIG_IEEE80211R */
int wpa_cipher_key_len(int cipher)
{
switch (cipher) {
case WPA_CIPHER_CCMP_256:
case WPA_CIPHER_GCMP_256:
return 32;
case WPA_CIPHER_CCMP:
case WPA_CIPHER_GCMP:
return 16;
case WPA_CIPHER_TKIP:
return 32;
case WPA_CIPHER_WEP104:
return 13;
case WPA_CIPHER_WEP40:
return 5;
}
return 0;
}
int wpa_cipher_rsc_len(int cipher)
{
switch (cipher) {
case WPA_CIPHER_CCMP_256:
case WPA_CIPHER_GCMP_256:
case WPA_CIPHER_CCMP:
case WPA_CIPHER_GCMP:
case WPA_CIPHER_TKIP:
return 6;
case WPA_CIPHER_WEP104:
case WPA_CIPHER_WEP40:
return 0;
}
return 0;
}
int wpa_cipher_to_alg(int cipher)
{
switch (cipher) {
case WPA_CIPHER_CCMP_256:
return WPA_ALG_CCMP_256;
case WPA_CIPHER_GCMP_256:
return WPA_ALG_GCMP_256;
case WPA_CIPHER_CCMP:
return WPA_ALG_CCMP;
case WPA_CIPHER_GCMP:
return WPA_ALG_GCMP;
case WPA_CIPHER_TKIP:
return WPA_ALG_TKIP;
case WPA_CIPHER_WEP104:
case WPA_CIPHER_WEP40:
return WPA_ALG_WEP;
}
return WPA_ALG_NONE;
}
int wpa_cipher_valid_pairwise(int cipher)
{
return cipher == WPA_CIPHER_CCMP_256 ||
cipher == WPA_CIPHER_GCMP_256 ||
cipher == WPA_CIPHER_CCMP ||
cipher == WPA_CIPHER_GCMP ||
cipher == WPA_CIPHER_TKIP;
}
u32 wpa_cipher_to_suite(int proto, int cipher)
{
if (cipher & WPA_CIPHER_CCMP_256)
return RSN_CIPHER_SUITE_CCMP_256;
if (cipher & WPA_CIPHER_GCMP_256)
return RSN_CIPHER_SUITE_GCMP_256;
if (cipher & WPA_CIPHER_CCMP)
return (proto == WPA_PROTO_RSN ?
RSN_CIPHER_SUITE_CCMP : WPA_CIPHER_SUITE_CCMP);
if (cipher & WPA_CIPHER_GCMP)
return RSN_CIPHER_SUITE_GCMP;
if (cipher & WPA_CIPHER_TKIP)
return (proto == WPA_PROTO_RSN ?
RSN_CIPHER_SUITE_TKIP : WPA_CIPHER_SUITE_TKIP);
if (cipher & WPA_CIPHER_WEP104)
return (proto == WPA_PROTO_RSN ?
RSN_CIPHER_SUITE_WEP104 : WPA_CIPHER_SUITE_WEP104);
if (cipher & WPA_CIPHER_WEP40)
return (proto == WPA_PROTO_RSN ?
RSN_CIPHER_SUITE_WEP40 : WPA_CIPHER_SUITE_WEP40);
if (cipher & WPA_CIPHER_NONE)
return (proto == WPA_PROTO_RSN ?
RSN_CIPHER_SUITE_NONE : WPA_CIPHER_SUITE_NONE);
if (cipher & WPA_CIPHER_GTK_NOT_USED)
return RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED;
return 0;
}
int rsn_cipher_put_suites(u8 *pos, int ciphers)
{
int num_suites = 0;
if (ciphers & WPA_CIPHER_CCMP_256) {
RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP_256);
pos += RSN_SELECTOR_LEN;
num_suites++;
}
if (ciphers & WPA_CIPHER_GCMP_256) {
RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP_256);
pos += RSN_SELECTOR_LEN;
num_suites++;
}
if (ciphers & WPA_CIPHER_CCMP) {
RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_CCMP);
pos += RSN_SELECTOR_LEN;
num_suites++;
}
if (ciphers & WPA_CIPHER_GCMP) {
RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_GCMP);
pos += RSN_SELECTOR_LEN;
num_suites++;
}
if (ciphers & WPA_CIPHER_TKIP) {
RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_TKIP);
pos += RSN_SELECTOR_LEN;
num_suites++;
}
if (ciphers & WPA_CIPHER_NONE) {
RSN_SELECTOR_PUT(pos, RSN_CIPHER_SUITE_NONE);
pos += RSN_SELECTOR_LEN;
num_suites++;
}
return num_suites;
}
int wpa_cipher_put_suites(u8 *pos, int ciphers)
{
int num_suites = 0;
if (ciphers & WPA_CIPHER_CCMP) {
RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_CCMP);
pos += WPA_SELECTOR_LEN;
num_suites++;
}
if (ciphers & WPA_CIPHER_TKIP) {
RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_TKIP);
pos += WPA_SELECTOR_LEN;
num_suites++;
}
if (ciphers & WPA_CIPHER_NONE) {
RSN_SELECTOR_PUT(pos, WPA_CIPHER_SUITE_NONE);
pos += WPA_SELECTOR_LEN;
num_suites++;
}
return num_suites;
}
int wpa_pick_pairwise_cipher(int ciphers, int none_allowed)
{
if (ciphers & WPA_CIPHER_CCMP_256)
return WPA_CIPHER_CCMP_256;
if (ciphers & WPA_CIPHER_GCMP_256)
return WPA_CIPHER_GCMP_256;
if (ciphers & WPA_CIPHER_CCMP)
return WPA_CIPHER_CCMP;
if (ciphers & WPA_CIPHER_GCMP)
return WPA_CIPHER_GCMP;
if (ciphers & WPA_CIPHER_TKIP)
return WPA_CIPHER_TKIP;
if (none_allowed && (ciphers & WPA_CIPHER_NONE))
return WPA_CIPHER_NONE;
return -1;
}
int wpa_pick_group_cipher(int ciphers)
{
if (ciphers & WPA_CIPHER_CCMP_256)
return WPA_CIPHER_CCMP_256;
if (ciphers & WPA_CIPHER_GCMP_256)
return WPA_CIPHER_GCMP_256;
if (ciphers & WPA_CIPHER_CCMP)
return WPA_CIPHER_CCMP;
if (ciphers & WPA_CIPHER_GCMP)
return WPA_CIPHER_GCMP;
if (ciphers & WPA_CIPHER_GTK_NOT_USED)
return WPA_CIPHER_GTK_NOT_USED;
if (ciphers & WPA_CIPHER_TKIP)
return WPA_CIPHER_TKIP;
if (ciphers & WPA_CIPHER_WEP104)
return WPA_CIPHER_WEP104;
if (ciphers & WPA_CIPHER_WEP40)
return WPA_CIPHER_WEP40;
return -1;
}
int wpa_parse_cipher(const char *value)
{
int val = 0, last;
char *start, *end, *buf;
buf = os_strdup(value);
if (buf == NULL)
return -1;
start = buf;
while (*start != '\0') {
while (*start == ' ' || *start == '\t')
start++;
if (*start == '\0')
break;
end = start;
while (*end != ' ' && *end != '\t' && *end != '\0')
end++;
last = *end == '\0';
*end = '\0';
if (os_strcmp(start, "CCMP-256") == 0)
val |= WPA_CIPHER_CCMP_256;
else if (os_strcmp(start, "GCMP-256") == 0)
val |= WPA_CIPHER_GCMP_256;
else if (os_strcmp(start, "CCMP") == 0)
val |= WPA_CIPHER_CCMP;
else if (os_strcmp(start, "GCMP") == 0)
val |= WPA_CIPHER_GCMP;
else if (os_strcmp(start, "TKIP") == 0)
val |= WPA_CIPHER_TKIP;
else if (os_strcmp(start, "WEP104") == 0)
val |= WPA_CIPHER_WEP104;
else if (os_strcmp(start, "WEP40") == 0)
val |= WPA_CIPHER_WEP40;
else if (os_strcmp(start, "NONE") == 0)
val |= WPA_CIPHER_NONE;
else if (os_strcmp(start, "GTK_NOT_USED") == 0)
val |= WPA_CIPHER_GTK_NOT_USED;
else {
os_free(buf);
return -1;
}
if (last)
break;
start = end + 1;
}
os_free(buf);
return val;
}
int wpa_write_ciphers(char *start, char *end, int ciphers, const char *delim)
{
char *pos = start;
int ret;
if (ciphers & WPA_CIPHER_CCMP_256) {
ret = os_snprintf(pos, end - pos, "%sCCMP-256",
pos == start ? "" : delim);
if (ret < 0 || ret >= end - pos)
return -1;
pos += ret;
}
if (ciphers & WPA_CIPHER_GCMP_256) {
ret = os_snprintf(pos, end - pos, "%sGCMP-256",
pos == start ? "" : delim);
if (ret < 0 || ret >= end - pos)
return -1;
pos += ret;
}
if (ciphers & WPA_CIPHER_CCMP) {
ret = os_snprintf(pos, end - pos, "%sCCMP",
pos == start ? "" : delim);
if (ret < 0 || ret >= end - pos)
return -1;
pos += ret;
}
if (ciphers & WPA_CIPHER_GCMP) {
ret = os_snprintf(pos, end - pos, "%sGCMP",
pos == start ? "" : delim);
if (ret < 0 || ret >= end - pos)
return -1;
pos += ret;
}
if (ciphers & WPA_CIPHER_TKIP) {
ret = os_snprintf(pos, end - pos, "%sTKIP",
pos == start ? "" : delim);
if (ret < 0 || ret >= end - pos)
return -1;
pos += ret;
}
if (ciphers & WPA_CIPHER_WEP104) {
ret = os_snprintf(pos, end - pos, "%sWEP104",
pos == start ? "" : delim);
if (ret < 0 || ret >= end - pos)
return -1;
pos += ret;
}
if (ciphers & WPA_CIPHER_WEP40) {
ret = os_snprintf(pos, end - pos, "%sWEP40",
pos == start ? "" : delim);
if (ret < 0 || ret >= end - pos)
return -1;
pos += ret;
}
if (ciphers & WPA_CIPHER_NONE) {
ret = os_snprintf(pos, end - pos, "%sNONE",
pos == start ? "" : delim);
if (ret < 0 || ret >= end - pos)
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;
}
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