dist/wpa/src/common/wpa_common.h

   1 /*
   2  * WPA definitions shared between hostapd and wpa_supplicant
   3  * Copyright (c) 2002-2007, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #ifndef WPA_COMMON_H
  16 #define WPA_COMMON_H
  17
  18 #define WPA_MAX_SSID_LEN 32
  19
  20 /* IEEE 802.11i */
  21 #define PMKID_LEN 16
  22 #define PMK_LEN 32
  23 #define WPA_REPLAY_COUNTER_LEN 8
  24 #define WPA_NONCE_LEN 32
  25 #define WPA_KEY_RSC_LEN 8
  26 #define WPA_GMK_LEN 32
  27 #define WPA_GTK_MAX_LEN 32
  28
  29 #define WPA_SELECTOR_LEN 4
  30 #define WPA_VERSION 1
  31 #define RSN_SELECTOR_LEN 4
  32 #define RSN_VERSION 1
  33
  34 #define RSN_SELECTOR(a, b, c, d) \
  35         ((((u32) (a)) << 24) | (((u32) (b)) << 16) | (((u32) (c)) << 8) | \
  36          (u32) (d))
  37
  38 #define WPA_AUTH_KEY_MGMT_NONE RSN_SELECTOR(0x00, 0x50, 0xf2, 0)
  39 #define WPA_AUTH_KEY_MGMT_UNSPEC_802_1X RSN_SELECTOR(0x00, 0x50, 0xf2, 1)
  40 #define WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X RSN_SELECTOR(0x00, 0x50, 0xf2, 2)
  41 #define WPA_CIPHER_SUITE_NONE RSN_SELECTOR(0x00, 0x50, 0xf2, 0)
  42 #define WPA_CIPHER_SUITE_WEP40 RSN_SELECTOR(0x00, 0x50, 0xf2, 1)
  43 #define WPA_CIPHER_SUITE_TKIP RSN_SELECTOR(0x00, 0x50, 0xf2, 2)
  44 #if 0
  45 #define WPA_CIPHER_SUITE_WRAP RSN_SELECTOR(0x00, 0x50, 0xf2, 3)
  46 #endif
  47 #define WPA_CIPHER_SUITE_CCMP RSN_SELECTOR(0x00, 0x50, 0xf2, 4)
  48 #define WPA_CIPHER_SUITE_WEP104 RSN_SELECTOR(0x00, 0x50, 0xf2, 5)
  49
  50
  51 #define RSN_AUTH_KEY_MGMT_UNSPEC_802_1X RSN_SELECTOR(0x00, 0x0f, 0xac, 1)
  52 #define RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X RSN_SELECTOR(0x00, 0x0f, 0xac, 2)
  53 #ifdef CONFIG_IEEE80211R
  54 #define RSN_AUTH_KEY_MGMT_FT_802_1X RSN_SELECTOR(0x00, 0x0f, 0xac, 3)
  55 #define RSN_AUTH_KEY_MGMT_FT_PSK RSN_SELECTOR(0x00, 0x0f, 0xac, 4)
  56 #endif /* CONFIG_IEEE80211R */
  57 #define RSN_CIPHER_SUITE_NONE RSN_SELECTOR(0x00, 0x0f, 0xac, 0)
  58 #define RSN_CIPHER_SUITE_WEP40 RSN_SELECTOR(0x00, 0x0f, 0xac, 1)
  59 #define RSN_CIPHER_SUITE_TKIP RSN_SELECTOR(0x00, 0x0f, 0xac, 2)
  60 #if 0
  61 #define RSN_CIPHER_SUITE_WRAP RSN_SELECTOR(0x00, 0x0f, 0xac, 3)
  62 #endif
  63 #define RSN_CIPHER_SUITE_CCMP RSN_SELECTOR(0x00, 0x0f, 0xac, 4)
  64 #define RSN_CIPHER_SUITE_WEP104 RSN_SELECTOR(0x00, 0x0f, 0xac, 5)
  65 #ifdef CONFIG_IEEE80211W
  66 #define RSN_CIPHER_SUITE_AES_128_CMAC RSN_SELECTOR(0x00, 0x0f, 0xac, 6)
  67 #endif /* CONFIG_IEEE80211W */
  68
  69 /* EAPOL-Key Key Data Encapsulation
  70  * GroupKey and PeerKey require encryption, otherwise, encryption is optional.
  71  */
  72 #define RSN_KEY_DATA_GROUPKEY RSN_SELECTOR(0x00, 0x0f, 0xac, 1)
  73 #if 0
  74 #define RSN_KEY_DATA_STAKEY RSN_SELECTOR(0x00, 0x0f, 0xac, 2)
  75 #endif
  76 #define RSN_KEY_DATA_MAC_ADDR RSN_SELECTOR(0x00, 0x0f, 0xac, 3)
  77 #define RSN_KEY_DATA_PMKID RSN_SELECTOR(0x00, 0x0f, 0xac, 4)
  78 #ifdef CONFIG_PEERKEY
  79 #define RSN_KEY_DATA_SMK RSN_SELECTOR(0x00, 0x0f, 0xac, 5)
  80 #define RSN_KEY_DATA_NONCE RSN_SELECTOR(0x00, 0x0f, 0xac, 6)
  81 #define RSN_KEY_DATA_LIFETIME RSN_SELECTOR(0x00, 0x0f, 0xac, 7)
  82 #define RSN_KEY_DATA_ERROR RSN_SELECTOR(0x00, 0x0f, 0xac, 8)
  83 #endif /* CONFIG_PEERKEY */
  84 #ifdef CONFIG_IEEE80211W
  85 #define RSN_KEY_DATA_IGTK RSN_SELECTOR(0x00, 0x0f, 0xac, 9)
  86 #endif /* CONFIG_IEEE80211W */
  87
  88 #define WPA_OUI_TYPE RSN_SELECTOR(0x00, 0x50, 0xf2, 1)
  89
  90 #define RSN_SELECTOR_PUT(a, val) WPA_PUT_BE32((u8 *) (a), (val))
  91 #define RSN_SELECTOR_GET(a) WPA_GET_BE32((const u8 *) (a))
  92
  93 #define RSN_NUM_REPLAY_COUNTERS_1 0
  94 #define RSN_NUM_REPLAY_COUNTERS_2 1
  95 #define RSN_NUM_REPLAY_COUNTERS_4 2
  96 #define RSN_NUM_REPLAY_COUNTERS_16 3
  97
  98
  99 #ifdef _MSC_VER
 100 #pragma pack(push, 1)
 101 #endif /* _MSC_VER */
 102
 103 #ifdef CONFIG_IEEE80211W
 104 #define WPA_IGTK_LEN 16
 105 #endif /* CONFIG_IEEE80211W */
 106
 107
 108 /* IEEE 802.11, 7.3.2.25.3 RSN Capabilities */
 109 #define WPA_CAPABILITY_PREAUTH BIT(0)
 110 #define WPA_CAPABILITY_MGMT_FRAME_PROTECTION BIT(7)
 111 #define WPA_CAPABILITY_PEERKEY_ENABLED BIT(9)
 112
 113
 114 /* IEEE 802.11r */
 115 #define MOBILITY_DOMAIN_ID_LEN 2
 116 #define FT_R0KH_ID_MAX_LEN 48
 117 #define FT_R1KH_ID_LEN 6
 118 #define WPA_PMK_NAME_LEN 16
 119
 120
 121 /* IEEE 802.11, 8.5.2 EAPOL-Key frames */
 122 #define WPA_KEY_INFO_TYPE_MASK ((u16) (BIT(0) | BIT(1) | BIT(2)))
 123 #define WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 BIT(0)
 124 #define WPA_KEY_INFO_TYPE_HMAC_SHA1_AES BIT(1)
 125 #define WPA_KEY_INFO_TYPE_AES_128_CMAC 3
 126 #define WPA_KEY_INFO_KEY_TYPE BIT(3) /* 1 = Pairwise, 0 = Group key */
 127 /* bit4..5 is used in WPA, but is reserved in IEEE 802.11i/RSN */
 128 #define WPA_KEY_INFO_KEY_INDEX_MASK (BIT(4) | BIT(5))
 129 #define WPA_KEY_INFO_KEY_INDEX_SHIFT 4
 130 #define WPA_KEY_INFO_INSTALL BIT(6) /* pairwise */
 131 #define WPA_KEY_INFO_TXRX BIT(6) /* group */
 132 #define WPA_KEY_INFO_ACK BIT(7)
 133 #define WPA_KEY_INFO_MIC BIT(8)
 134 #define WPA_KEY_INFO_SECURE BIT(9)
 135 #define WPA_KEY_INFO_ERROR BIT(10)
 136 #define WPA_KEY_INFO_REQUEST BIT(11)
 137 #define WPA_KEY_INFO_ENCR_KEY_DATA BIT(12) /* IEEE 802.11i/RSN only */
 138 #define WPA_KEY_INFO_SMK_MESSAGE BIT(13)
 139
 140
 141 struct wpa_eapol_key {
 142         u8 type;
 143         /* Note: key_info, key_length, and key_data_length are unaligned */
 144         u8 key_info[2]; /* big endian */
 145         u8 key_length[2]; /* big endian */
 146         u8 replay_counter[WPA_REPLAY_COUNTER_LEN];
 147         u8 key_nonce[WPA_NONCE_LEN];
 148         u8 key_iv[16];
 149         u8 key_rsc[WPA_KEY_RSC_LEN];
 150         u8 key_id[8]; /* Reserved in IEEE 802.11i/RSN */
 151         u8 key_mic[16];
 152         u8 key_data_length[2]; /* big endian */
 153         /* followed by key_data_length bytes of key_data */
 154 } STRUCT_PACKED;
 155
 156 /**
 157  * struct wpa_ptk - WPA Pairwise Transient Key
 158  * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
 159  */
 160 struct wpa_ptk {
 161         u8 kck[16]; /* EAPOL-Key Key Confirmation Key (KCK) */
 162         u8 kek[16]; /* EAPOL-Key Key Encryption Key (KEK) */
 163         u8 tk1[16]; /* Temporal Key 1 (TK1) */
 164         union {
 165                 u8 tk2[16]; /* Temporal Key 2 (TK2) */
 166                 struct {
 167                         u8 tx_mic_key[8];
 168                         u8 rx_mic_key[8];
 169                 } auth;
 170         } u;
 171 } STRUCT_PACKED;
 172
 173
 174 /* WPA IE version 1
 175  * 00-50-f2:1 (OUI:OUI type)
 176  * 0x01 0x00 (version; little endian)
 177  * (all following fields are optional:)
 178  * Group Suite Selector (4 octets) (default: TKIP)
 179  * Pairwise Suite Count (2 octets, little endian) (default: 1)
 180  * Pairwise Suite List (4 * n octets) (default: TKIP)
 181  * Authenticated Key Management Suite Count (2 octets, little endian)
 182  *    (default: 1)
 183  * Authenticated Key Management Suite List (4 * n octets)
 184  *    (default: unspec 802.1X)
 185  * WPA Capabilities (2 octets, little endian) (default: 0)
 186  */
 187
 188 struct wpa_ie_hdr {
 189         u8 elem_id;
 190         u8 len;
 191         u8 oui[4]; /* 24-bit OUI followed by 8-bit OUI type */
 192         u8 version[2]; /* little endian */
 193 } STRUCT_PACKED;
 194
 195
 196 /* 1/4: PMKID
 197  * 2/4: RSN IE
 198  * 3/4: one or two RSN IEs + GTK IE (encrypted)
 199  * 4/4: empty
 200  * 1/2: GTK IE (encrypted)
 201  * 2/2: empty
 202  */
 203
 204 /* RSN IE version 1
 205  * 0x01 0x00 (version; little endian)
 206  * (all following fields are optional:)
 207  * Group Suite Selector (4 octets) (default: CCMP)
 208  * Pairwise Suite Count (2 octets, little endian) (default: 1)
 209  * Pairwise Suite List (4 * n octets) (default: CCMP)
 210  * Authenticated Key Management Suite Count (2 octets, little endian)
 211  *    (default: 1)
 212  * Authenticated Key Management Suite List (4 * n octets)
 213  *    (default: unspec 802.1X)
 214  * RSN Capabilities (2 octets, little endian) (default: 0)
 215  * PMKID Count (2 octets) (default: 0)
 216  * PMKID List (16 * n octets)
 217  * Management Group Cipher Suite (4 octets) (default: AES-128-CMAC)
 218  */
 219
 220 struct rsn_ie_hdr {
 221         u8 elem_id; /* WLAN_EID_RSN */
 222         u8 len;
 223         u8 version[2]; /* little endian */
 224 } STRUCT_PACKED;
 225
 226
 227 #ifdef CONFIG_PEERKEY
 228 enum {
 229         STK_MUI_4WAY_STA_AP = 1,
 230         STK_MUI_4WAY_STAT_STA = 2,
 231         STK_MUI_GTK = 3,
 232         STK_MUI_SMK = 4
 233 };
 234
 235 enum {
 236         STK_ERR_STA_NR = 1,
 237         STK_ERR_STA_NRSN = 2,
 238         STK_ERR_CPHR_NS = 3,
 239         STK_ERR_NO_STSL = 4
 240 };
 241 #endif /* CONFIG_PEERKEY */
 242
 243 struct rsn_error_kde {
 244         be16 mui;
 245         be16 error_type;
 246 } STRUCT_PACKED;
 247
 248 #ifdef CONFIG_IEEE80211W
 249 struct wpa_igtk_kde {
 250         u8 keyid[2];
 251         u8 pn[6];
 252         u8 igtk[WPA_IGTK_LEN];
 253 } STRUCT_PACKED;
 254 #endif /* CONFIG_IEEE80211W */
 255
 256 #ifdef CONFIG_IEEE80211R
 257 struct rsn_mdie {
 258         u8 mobility_domain[MOBILITY_DOMAIN_ID_LEN];
 259         u8 ft_capab;
 260 } STRUCT_PACKED;
 261
 262 #define RSN_FT_CAPAB_FT_OVER_DS BIT(0)
 263 #define RSN_FT_CAPAB_FT_RESOURCE_REQ_SUPP BIT(1)
 264
 265 struct rsn_ftie {
 266         u8 mic_control[2];
 267         u8 mic[16];
 268         u8 anonce[WPA_NONCE_LEN];
 269         u8 snonce[WPA_NONCE_LEN];
 270         /* followed by optional parameters */
 271 } STRUCT_PACKED;
 272
 273 #define FTIE_SUBELEM_R1KH_ID 1
 274 #define FTIE_SUBELEM_GTK 2
 275 #define FTIE_SUBELEM_R0KH_ID 3
 276
 277 #endif /* CONFIG_IEEE80211R */
 278
 279 #ifdef _MSC_VER
 280 #pragma pack(pop)
 281 #endif /* _MSC_VER */
 282
 283
 284 int wpa_eapol_key_mic(const u8 *key, int ver, const u8 *buf, size_t len,
 285                       u8 *mic);
 286 void wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const char *label,
 287                     const u8 *addr1, const u8 *addr2,
 288                     const u8 *nonce1, const u8 *nonce2,
 289                     u8 *ptk, size_t ptk_len);
 290
 291 #ifdef CONFIG_IEEE80211R
 292 int wpa_ft_mic(const u8 *kck, const u8 *sta_addr, const u8 *ap_addr,
 293                u8 transaction_seqnum, const u8 *mdie, size_t mdie_len,
 294                const u8 *ftie, size_t ftie_len,
 295                const u8 *rsnie, size_t rsnie_len,
 296                const u8 *ric, size_t ric_len, u8 *mic);
 297 void wpa_derive_pmk_r0(const u8 *xxkey, size_t xxkey_len,
 298                        const u8 *ssid, size_t ssid_len,
 299                        const u8 *mdid, const u8 *r0kh_id, size_t r0kh_id_len,
 300                        const u8 *s0kh_id, u8 *pmk_r0, u8 *pmk_r0_name);
 301 void wpa_derive_pmk_r1_name(const u8 *pmk_r0_name, const u8 *r1kh_id,
 302                             const u8 *s1kh_id, u8 *pmk_r1_name);
 303 void wpa_derive_pmk_r1(const u8 *pmk_r0, const u8 *pmk_r0_name,
 304                        const u8 *r1kh_id, const u8 *s1kh_id,
 305                        u8 *pmk_r1, u8 *pmk_r1_name);
 306 void wpa_pmk_r1_to_ptk(const u8 *pmk_r1, const u8 *snonce, const u8 *anonce,
 307                        const u8 *sta_addr, const u8 *bssid,
 308                        const u8 *pmk_r1_name,
 309                        u8 *ptk, size_t ptk_len, u8 *ptk_name);
 310 #endif /* CONFIG_IEEE80211R */
 311
 312 struct wpa_ie_data {
 313         int proto;
 314         int pairwise_cipher;
 315         int group_cipher;
 316         int key_mgmt;
 317         int capabilities;
 318         size_t num_pmkid;
 319         const u8 *pmkid;
 320         int mgmt_group_cipher;
 321 };
 322
 323
 324 int wpa_parse_wpa_ie_rsn(const u8 *rsn_ie, size_t rsn_ie_len,
 325                          struct wpa_ie_data *data);
 326
 327 #endif /* WPA_COMMON_H */