wpa_common.c revision 209158
1189251Ssam/* 2189251Ssam * WPA/RSN - Shared functions for supplicant and authenticator 3189251Ssam * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi> 4189251Ssam * 5189251Ssam * This program is free software; you can redistribute it and/or modify 6189251Ssam * it under the terms of the GNU General Public License version 2 as 7189251Ssam * published by the Free Software Foundation. 8189251Ssam * 9189251Ssam * Alternatively, this software may be distributed under the terms of BSD 10189251Ssam * license. 11189251Ssam * 12189251Ssam * See README and COPYING for more details. 13189251Ssam */ 14189251Ssam 15189251Ssam#include "includes.h" 16189251Ssam 17189251Ssam#include "common.h" 18189251Ssam#include "md5.h" 19189251Ssam#include "sha1.h" 20189251Ssam#include "sha256.h" 21189251Ssam#include "aes_wrap.h" 22189251Ssam#include "crypto.h" 23189251Ssam#include "ieee802_11_defs.h" 24189251Ssam#include "defs.h" 25189251Ssam#include "wpa_common.h" 26189251Ssam 27189251Ssam 28189251Ssam/** 29189251Ssam * wpa_eapol_key_mic - Calculate EAPOL-Key MIC 30189251Ssam * @key: EAPOL-Key Key Confirmation Key (KCK) 31189251Ssam * @ver: Key descriptor version (WPA_KEY_INFO_TYPE_*) 32189251Ssam * @buf: Pointer to the beginning of the EAPOL header (version field) 33189251Ssam * @len: Length of the EAPOL frame (from EAPOL header to the end of the frame) 34189251Ssam * @mic: Pointer to the buffer to which the EAPOL-Key MIC is written 35189251Ssam * Returns: 0 on success, -1 on failure 36189251Ssam * 37189251Ssam * Calculate EAPOL-Key MIC for an EAPOL-Key packet. The EAPOL-Key MIC field has 38189251Ssam * to be cleared (all zeroes) when calling this function. 39189251Ssam * 40189251Ssam * Note: 'IEEE Std 802.11i-2004 - 8.5.2 EAPOL-Key frames' has an error in the 41189251Ssam * description of the Key MIC calculation. It includes packet data from the 42189251Ssam * beginning of the EAPOL-Key header, not EAPOL header. This incorrect change 43189251Ssam * happened during final editing of the standard and the correct behavior is 44189251Ssam * defined in the last draft (IEEE 802.11i/D10). 45189251Ssam */ 46189251Ssamint wpa_eapol_key_mic(const u8 *key, int ver, const u8 *buf, size_t len, 47189251Ssam u8 *mic) 48189251Ssam{ 49189251Ssam u8 hash[SHA1_MAC_LEN]; 50189251Ssam 51189251Ssam switch (ver) { 52189251Ssam case WPA_KEY_INFO_TYPE_HMAC_MD5_RC4: 53189251Ssam hmac_md5(key, 16, buf, len, mic); 54189251Ssam break; 55189251Ssam case WPA_KEY_INFO_TYPE_HMAC_SHA1_AES: 56189251Ssam hmac_sha1(key, 16, buf, len, hash); 57189251Ssam os_memcpy(mic, hash, MD5_MAC_LEN); 58189251Ssam break; 59209158Srpaulo#if defined(CONFIG_IEEE80211R) || defined(CONFIG_IEEE80211W) 60189251Ssam case WPA_KEY_INFO_TYPE_AES_128_CMAC: 61189251Ssam return omac1_aes_128(key, buf, len, mic); 62209158Srpaulo#endif /* CONFIG_IEEE80211R || CONFIG_IEEE80211W */ 63189251Ssam default: 64189251Ssam return -1; 65189251Ssam } 66189251Ssam 67189251Ssam return 0; 68189251Ssam} 69189251Ssam 70189251Ssam 71189251Ssam/** 72189251Ssam * wpa_pmk_to_ptk - Calculate PTK from PMK, addresses, and nonces 73189251Ssam * @pmk: Pairwise master key 74189251Ssam * @pmk_len: Length of PMK 75189251Ssam * @label: Label to use in derivation 76189251Ssam * @addr1: AA or SA 77189251Ssam * @addr2: SA or AA 78189251Ssam * @nonce1: ANonce or SNonce 79189251Ssam * @nonce2: SNonce or ANonce 80189251Ssam * @ptk: Buffer for pairwise transient key 81189251Ssam * @ptk_len: Length of PTK 82189251Ssam * @use_sha256: Whether to use SHA256-based KDF 83189251Ssam * 84189251Ssam * IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy 85189251Ssam * PTK = PRF-X(PMK, "Pairwise key expansion", 86189251Ssam * Min(AA, SA) || Max(AA, SA) || 87189251Ssam * Min(ANonce, SNonce) || Max(ANonce, SNonce)) 88189251Ssam * 89189251Ssam * STK = PRF-X(SMK, "Peer key expansion", 90189251Ssam * Min(MAC_I, MAC_P) || Max(MAC_I, MAC_P) || 91189251Ssam * Min(INonce, PNonce) || Max(INonce, PNonce)) 92189251Ssam */ 93189251Ssamvoid wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const char *label, 94189251Ssam const u8 *addr1, const u8 *addr2, 95189251Ssam const u8 *nonce1, const u8 *nonce2, 96189251Ssam u8 *ptk, size_t ptk_len, int use_sha256) 97189251Ssam{ 98189251Ssam u8 data[2 * ETH_ALEN + 2 * WPA_NONCE_LEN]; 99189251Ssam 100189251Ssam if (os_memcmp(addr1, addr2, ETH_ALEN) < 0) { 101189251Ssam os_memcpy(data, addr1, ETH_ALEN); 102189251Ssam os_memcpy(data + ETH_ALEN, addr2, ETH_ALEN); 103189251Ssam } else { 104189251Ssam os_memcpy(data, addr2, ETH_ALEN); 105189251Ssam os_memcpy(data + ETH_ALEN, addr1, ETH_ALEN); 106189251Ssam } 107189251Ssam 108189251Ssam if (os_memcmp(nonce1, nonce2, WPA_NONCE_LEN) < 0) { 109189251Ssam os_memcpy(data + 2 * ETH_ALEN, nonce1, WPA_NONCE_LEN); 110189251Ssam os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce2, 111189251Ssam WPA_NONCE_LEN); 112189251Ssam } else { 113189251Ssam os_memcpy(data + 2 * ETH_ALEN, nonce2, WPA_NONCE_LEN); 114189251Ssam os_memcpy(data + 2 * ETH_ALEN + WPA_NONCE_LEN, nonce1, 115189251Ssam WPA_NONCE_LEN); 116189251Ssam } 117189251Ssam 118189251Ssam#ifdef CONFIG_IEEE80211W 119189251Ssam if (use_sha256) 120189251Ssam sha256_prf(pmk, pmk_len, label, data, sizeof(data), 121189251Ssam ptk, ptk_len); 122189251Ssam else 123189251Ssam#endif /* CONFIG_IEEE80211W */ 124189251Ssam sha1_prf(pmk, pmk_len, label, data, sizeof(data), ptk, 125189251Ssam ptk_len); 126189251Ssam 127189251Ssam wpa_printf(MSG_DEBUG, "WPA: PTK derivation - A1=" MACSTR " A2=" MACSTR, 128189251Ssam MAC2STR(addr1), MAC2STR(addr2)); 129189251Ssam wpa_hexdump_key(MSG_DEBUG, "WPA: PMK", pmk, pmk_len); 130189251Ssam wpa_hexdump_key(MSG_DEBUG, "WPA: PTK", ptk, ptk_len); 131189251Ssam} 132189251Ssam 133189251Ssam 134189251Ssam#ifdef CONFIG_IEEE80211R 135189251Ssamint wpa_ft_mic(const u8 *kck, const u8 *sta_addr, const u8 *ap_addr, 136189251Ssam u8 transaction_seqnum, const u8 *mdie, size_t mdie_len, 137189251Ssam const u8 *ftie, size_t ftie_len, 138189251Ssam const u8 *rsnie, size_t rsnie_len, 139189251Ssam const u8 *ric, size_t ric_len, u8 *mic) 140189251Ssam{ 141189251Ssam u8 *buf, *pos; 142189251Ssam size_t buf_len; 143189251Ssam 144189251Ssam buf_len = 2 * ETH_ALEN + 1 + mdie_len + ftie_len + rsnie_len + ric_len; 145189251Ssam buf = os_malloc(buf_len); 146189251Ssam if (buf == NULL) 147189251Ssam return -1; 148189251Ssam 149189251Ssam pos = buf; 150189251Ssam os_memcpy(pos, sta_addr, ETH_ALEN); 151189251Ssam pos += ETH_ALEN; 152189251Ssam os_memcpy(pos, ap_addr, ETH_ALEN); 153189251Ssam pos += ETH_ALEN; 154189251Ssam *pos++ = transaction_seqnum; 155189251Ssam if (rsnie) { 156189251Ssam os_memcpy(pos, rsnie, rsnie_len); 157189251Ssam pos += rsnie_len; 158189251Ssam } 159189251Ssam if (mdie) { 160189251Ssam os_memcpy(pos, mdie, mdie_len); 161189251Ssam pos += mdie_len; 162189251Ssam } 163189251Ssam if (ftie) { 164189251Ssam struct rsn_ftie *_ftie; 165189251Ssam os_memcpy(pos, ftie, ftie_len); 166189251Ssam if (ftie_len < 2 + sizeof(*_ftie)) { 167189251Ssam os_free(buf); 168189251Ssam return -1; 169189251Ssam } 170189251Ssam _ftie = (struct rsn_ftie *) (pos + 2); 171189251Ssam os_memset(_ftie->mic, 0, sizeof(_ftie->mic)); 172189251Ssam pos += ftie_len; 173189251Ssam } 174189251Ssam if (ric) { 175189251Ssam os_memcpy(pos, ric, ric_len); 176189251Ssam pos += ric_len; 177189251Ssam } 178189251Ssam 179189251Ssam wpa_hexdump(MSG_MSGDUMP, "FT: MIC data", buf, pos - buf); 180189251Ssam if (omac1_aes_128(kck, buf, pos - buf, mic)) { 181189251Ssam os_free(buf); 182189251Ssam return -1; 183189251Ssam } 184189251Ssam 185189251Ssam os_free(buf); 186189251Ssam 187189251Ssam return 0; 188189251Ssam} 189189251Ssam#endif /* CONFIG_IEEE80211R */ 190189251Ssam 191189251Ssam 192189251Ssam#ifndef CONFIG_NO_WPA2 193189251Ssamstatic int rsn_selector_to_bitfield(const u8 *s) 194189251Ssam{ 195189251Ssam if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_NONE) 196189251Ssam return WPA_CIPHER_NONE; 197189251Ssam if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_WEP40) 198189251Ssam return WPA_CIPHER_WEP40; 199189251Ssam if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_TKIP) 200189251Ssam return WPA_CIPHER_TKIP; 201189251Ssam if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_CCMP) 202189251Ssam return WPA_CIPHER_CCMP; 203189251Ssam if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_WEP104) 204189251Ssam return WPA_CIPHER_WEP104; 205189251Ssam#ifdef CONFIG_IEEE80211W 206189251Ssam if (RSN_SELECTOR_GET(s) == RSN_CIPHER_SUITE_AES_128_CMAC) 207189251Ssam return WPA_CIPHER_AES_128_CMAC; 208189251Ssam#endif /* CONFIG_IEEE80211W */ 209189251Ssam return 0; 210189251Ssam} 211189251Ssam 212189251Ssam 213189251Ssamstatic int rsn_key_mgmt_to_bitfield(const u8 *s) 214189251Ssam{ 215189251Ssam if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_UNSPEC_802_1X) 216189251Ssam return WPA_KEY_MGMT_IEEE8021X; 217189251Ssam if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X) 218189251Ssam return WPA_KEY_MGMT_PSK; 219189251Ssam#ifdef CONFIG_IEEE80211R 220189251Ssam if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_802_1X) 221189251Ssam return WPA_KEY_MGMT_FT_IEEE8021X; 222189251Ssam if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_FT_PSK) 223189251Ssam return WPA_KEY_MGMT_FT_PSK; 224189251Ssam#endif /* CONFIG_IEEE80211R */ 225189251Ssam#ifdef CONFIG_IEEE80211W 226189251Ssam if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_802_1X_SHA256) 227189251Ssam return WPA_KEY_MGMT_IEEE8021X_SHA256; 228189251Ssam if (RSN_SELECTOR_GET(s) == RSN_AUTH_KEY_MGMT_PSK_SHA256) 229189251Ssam return WPA_KEY_MGMT_PSK_SHA256; 230189251Ssam#endif /* CONFIG_IEEE80211W */ 231189251Ssam return 0; 232189251Ssam} 233189251Ssam#endif /* CONFIG_NO_WPA2 */ 234189251Ssam 235189251Ssam 236189251Ssam/** 237189251Ssam * wpa_parse_wpa_ie_rsn - Parse RSN IE 238189251Ssam * @rsn_ie: Buffer containing RSN IE 239189251Ssam * @rsn_ie_len: RSN IE buffer length (including IE number and length octets) 240189251Ssam * @data: Pointer to structure that will be filled in with parsed data 241189251Ssam * Returns: 0 on success, <0 on failure 242189251Ssam */ 243189251Ssamint wpa_parse_wpa_ie_rsn(const u8 *rsn_ie, size_t rsn_ie_len, 244189251Ssam struct wpa_ie_data *data) 245189251Ssam{ 246189251Ssam#ifndef CONFIG_NO_WPA2 247189251Ssam const struct rsn_ie_hdr *hdr; 248189251Ssam const u8 *pos; 249189251Ssam int left; 250189251Ssam int i, count; 251189251Ssam 252189251Ssam os_memset(data, 0, sizeof(*data)); 253189251Ssam data->proto = WPA_PROTO_RSN; 254189251Ssam data->pairwise_cipher = WPA_CIPHER_CCMP; 255189251Ssam data->group_cipher = WPA_CIPHER_CCMP; 256189251Ssam data->key_mgmt = WPA_KEY_MGMT_IEEE8021X; 257189251Ssam data->capabilities = 0; 258189251Ssam data->pmkid = NULL; 259189251Ssam data->num_pmkid = 0; 260189251Ssam#ifdef CONFIG_IEEE80211W 261189251Ssam data->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC; 262189251Ssam#else /* CONFIG_IEEE80211W */ 263189251Ssam data->mgmt_group_cipher = 0; 264189251Ssam#endif /* CONFIG_IEEE80211W */ 265189251Ssam 266189251Ssam if (rsn_ie_len == 0) { 267189251Ssam /* No RSN IE - fail silently */ 268189251Ssam return -1; 269189251Ssam } 270189251Ssam 271189251Ssam if (rsn_ie_len < sizeof(struct rsn_ie_hdr)) { 272189251Ssam wpa_printf(MSG_DEBUG, "%s: ie len too short %lu", 273189251Ssam __func__, (unsigned long) rsn_ie_len); 274189251Ssam return -1; 275189251Ssam } 276189251Ssam 277189251Ssam hdr = (const struct rsn_ie_hdr *) rsn_ie; 278189251Ssam 279189251Ssam if (hdr->elem_id != WLAN_EID_RSN || 280189251Ssam hdr->len != rsn_ie_len - 2 || 281189251Ssam WPA_GET_LE16(hdr->version) != RSN_VERSION) { 282189251Ssam wpa_printf(MSG_DEBUG, "%s: malformed ie or unknown version", 283189251Ssam __func__); 284189251Ssam return -2; 285189251Ssam } 286189251Ssam 287189251Ssam pos = (const u8 *) (hdr + 1); 288189251Ssam left = rsn_ie_len - sizeof(*hdr); 289189251Ssam 290189251Ssam if (left >= RSN_SELECTOR_LEN) { 291189251Ssam data->group_cipher = rsn_selector_to_bitfield(pos); 292189251Ssam#ifdef CONFIG_IEEE80211W 293189251Ssam if (data->group_cipher == WPA_CIPHER_AES_128_CMAC) { 294189251Ssam wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as group " 295189251Ssam "cipher", __func__); 296189251Ssam return -1; 297189251Ssam } 298189251Ssam#endif /* CONFIG_IEEE80211W */ 299189251Ssam pos += RSN_SELECTOR_LEN; 300189251Ssam left -= RSN_SELECTOR_LEN; 301189251Ssam } else if (left > 0) { 302189251Ssam wpa_printf(MSG_DEBUG, "%s: ie length mismatch, %u too much", 303189251Ssam __func__, left); 304189251Ssam return -3; 305189251Ssam } 306189251Ssam 307189251Ssam if (left >= 2) { 308189251Ssam data->pairwise_cipher = 0; 309189251Ssam count = WPA_GET_LE16(pos); 310189251Ssam pos += 2; 311189251Ssam left -= 2; 312189251Ssam if (count == 0 || left < count * RSN_SELECTOR_LEN) { 313189251Ssam wpa_printf(MSG_DEBUG, "%s: ie count botch (pairwise), " 314189251Ssam "count %u left %u", __func__, count, left); 315189251Ssam return -4; 316189251Ssam } 317189251Ssam for (i = 0; i < count; i++) { 318189251Ssam data->pairwise_cipher |= rsn_selector_to_bitfield(pos); 319189251Ssam pos += RSN_SELECTOR_LEN; 320189251Ssam left -= RSN_SELECTOR_LEN; 321189251Ssam } 322189251Ssam#ifdef CONFIG_IEEE80211W 323189251Ssam if (data->pairwise_cipher & WPA_CIPHER_AES_128_CMAC) { 324189251Ssam wpa_printf(MSG_DEBUG, "%s: AES-128-CMAC used as " 325189251Ssam "pairwise cipher", __func__); 326189251Ssam return -1; 327189251Ssam } 328189251Ssam#endif /* CONFIG_IEEE80211W */ 329189251Ssam } else if (left == 1) { 330189251Ssam wpa_printf(MSG_DEBUG, "%s: ie too short (for key mgmt)", 331189251Ssam __func__); 332189251Ssam return -5; 333189251Ssam } 334189251Ssam 335189251Ssam if (left >= 2) { 336189251Ssam data->key_mgmt = 0; 337189251Ssam count = WPA_GET_LE16(pos); 338189251Ssam pos += 2; 339189251Ssam left -= 2; 340189251Ssam if (count == 0 || left < count * RSN_SELECTOR_LEN) { 341189251Ssam wpa_printf(MSG_DEBUG, "%s: ie count botch (key mgmt), " 342189251Ssam "count %u left %u", __func__, count, left); 343189251Ssam return -6; 344189251Ssam } 345189251Ssam for (i = 0; i < count; i++) { 346189251Ssam data->key_mgmt |= rsn_key_mgmt_to_bitfield(pos); 347189251Ssam pos += RSN_SELECTOR_LEN; 348189251Ssam left -= RSN_SELECTOR_LEN; 349189251Ssam } 350189251Ssam } else if (left == 1) { 351189251Ssam wpa_printf(MSG_DEBUG, "%s: ie too short (for capabilities)", 352189251Ssam __func__); 353189251Ssam return -7; 354189251Ssam } 355189251Ssam 356189251Ssam if (left >= 2) { 357189251Ssam data->capabilities = WPA_GET_LE16(pos); 358189251Ssam pos += 2; 359189251Ssam left -= 2; 360189251Ssam } 361189251Ssam 362189251Ssam if (left >= 2) { 363189251Ssam data->num_pmkid = WPA_GET_LE16(pos); 364189251Ssam pos += 2; 365189251Ssam left -= 2; 366189251Ssam if (left < (int) data->num_pmkid * PMKID_LEN) { 367189251Ssam wpa_printf(MSG_DEBUG, "%s: PMKID underflow " 368189251Ssam "(num_pmkid=%lu left=%d)", 369189251Ssam __func__, (unsigned long) data->num_pmkid, 370189251Ssam left); 371189251Ssam data->num_pmkid = 0; 372189251Ssam return -9; 373189251Ssam } else { 374189251Ssam data->pmkid = pos; 375189251Ssam pos += data->num_pmkid * PMKID_LEN; 376189251Ssam left -= data->num_pmkid * PMKID_LEN; 377189251Ssam } 378189251Ssam } 379189251Ssam 380189251Ssam#ifdef CONFIG_IEEE80211W 381189251Ssam if (left >= 4) { 382189251Ssam data->mgmt_group_cipher = rsn_selector_to_bitfield(pos); 383189251Ssam if (data->mgmt_group_cipher != WPA_CIPHER_AES_128_CMAC) { 384189251Ssam wpa_printf(MSG_DEBUG, "%s: Unsupported management " 385189251Ssam "group cipher 0x%x", __func__, 386189251Ssam data->mgmt_group_cipher); 387189251Ssam return -10; 388189251Ssam } 389189251Ssam pos += RSN_SELECTOR_LEN; 390189251Ssam left -= RSN_SELECTOR_LEN; 391189251Ssam } 392189251Ssam#endif /* CONFIG_IEEE80211W */ 393189251Ssam 394189251Ssam if (left > 0) { 395189251Ssam wpa_printf(MSG_DEBUG, "%s: ie has %u trailing bytes - ignored", 396189251Ssam __func__, left); 397189251Ssam } 398189251Ssam 399189251Ssam return 0; 400189251Ssam#else /* CONFIG_NO_WPA2 */ 401189251Ssam return -1; 402189251Ssam#endif /* CONFIG_NO_WPA2 */ 403189251Ssam} 404189251Ssam 405189251Ssam 406189251Ssam#ifdef CONFIG_IEEE80211R 407189251Ssam 408189251Ssam/** 409189251Ssam * wpa_derive_pmk_r0 - Derive PMK-R0 and PMKR0Name 410189251Ssam * 411189251Ssam * IEEE Std 802.11r-2008 - 8.5.1.5.3 412189251Ssam */ 413189251Ssamvoid wpa_derive_pmk_r0(const u8 *xxkey, size_t xxkey_len, 414189251Ssam const u8 *ssid, size_t ssid_len, 415189251Ssam const u8 *mdid, const u8 *r0kh_id, size_t r0kh_id_len, 416189251Ssam const u8 *s0kh_id, u8 *pmk_r0, u8 *pmk_r0_name) 417189251Ssam{ 418189251Ssam u8 buf[1 + WPA_MAX_SSID_LEN + MOBILITY_DOMAIN_ID_LEN + 1 + 419189251Ssam FT_R0KH_ID_MAX_LEN + ETH_ALEN]; 420189251Ssam u8 *pos, r0_key_data[48], hash[32]; 421189251Ssam const u8 *addr[2]; 422189251Ssam size_t len[2]; 423189251Ssam 424189251Ssam /* 425189251Ssam * R0-Key-Data = KDF-384(XXKey, "FT-R0", 426189251Ssam * SSIDlength || SSID || MDID || R0KHlength || 427189251Ssam * R0KH-ID || S0KH-ID) 428189251Ssam * XXKey is either the second 256 bits of MSK or PSK. 429189251Ssam * PMK-R0 = L(R0-Key-Data, 0, 256) 430189251Ssam * PMK-R0Name-Salt = L(R0-Key-Data, 256, 128) 431189251Ssam */ 432189251Ssam if (ssid_len > WPA_MAX_SSID_LEN || r0kh_id_len > FT_R0KH_ID_MAX_LEN) 433189251Ssam return; 434189251Ssam pos = buf; 435189251Ssam *pos++ = ssid_len; 436189251Ssam os_memcpy(pos, ssid, ssid_len); 437189251Ssam pos += ssid_len; 438189251Ssam os_memcpy(pos, mdid, MOBILITY_DOMAIN_ID_LEN); 439189251Ssam pos += MOBILITY_DOMAIN_ID_LEN; 440189251Ssam *pos++ = r0kh_id_len; 441189251Ssam os_memcpy(pos, r0kh_id, r0kh_id_len); 442189251Ssam pos += r0kh_id_len; 443189251Ssam os_memcpy(pos, s0kh_id, ETH_ALEN); 444189251Ssam pos += ETH_ALEN; 445189251Ssam 446189251Ssam sha256_prf(xxkey, xxkey_len, "FT-R0", buf, pos - buf, 447189251Ssam r0_key_data, sizeof(r0_key_data)); 448189251Ssam os_memcpy(pmk_r0, r0_key_data, PMK_LEN); 449189251Ssam 450189251Ssam /* 451189251Ssam * PMKR0Name = Truncate-128(SHA-256("FT-R0N" || PMK-R0Name-Salt) 452189251Ssam */ 453189251Ssam addr[0] = (const u8 *) "FT-R0N"; 454189251Ssam len[0] = 6; 455189251Ssam addr[1] = r0_key_data + PMK_LEN; 456189251Ssam len[1] = 16; 457189251Ssam 458189251Ssam sha256_vector(2, addr, len, hash); 459189251Ssam os_memcpy(pmk_r0_name, hash, WPA_PMK_NAME_LEN); 460189251Ssam} 461189251Ssam 462189251Ssam 463189251Ssam/** 464189251Ssam * wpa_derive_pmk_r1_name - Derive PMKR1Name 465189251Ssam * 466189251Ssam * IEEE Std 802.11r-2008 - 8.5.1.5.4 467189251Ssam */ 468189251Ssamvoid wpa_derive_pmk_r1_name(const u8 *pmk_r0_name, const u8 *r1kh_id, 469189251Ssam const u8 *s1kh_id, u8 *pmk_r1_name) 470189251Ssam{ 471189251Ssam u8 hash[32]; 472189251Ssam const u8 *addr[4]; 473189251Ssam size_t len[4]; 474189251Ssam 475189251Ssam /* 476189251Ssam * PMKR1Name = Truncate-128(SHA-256("FT-R1N" || PMKR0Name || 477189251Ssam * R1KH-ID || S1KH-ID)) 478189251Ssam */ 479189251Ssam addr[0] = (const u8 *) "FT-R1N"; 480189251Ssam len[0] = 6; 481189251Ssam addr[1] = pmk_r0_name; 482189251Ssam len[1] = WPA_PMK_NAME_LEN; 483189251Ssam addr[2] = r1kh_id; 484189251Ssam len[2] = FT_R1KH_ID_LEN; 485189251Ssam addr[3] = s1kh_id; 486189251Ssam len[3] = ETH_ALEN; 487189251Ssam 488189251Ssam sha256_vector(4, addr, len, hash); 489189251Ssam os_memcpy(pmk_r1_name, hash, WPA_PMK_NAME_LEN); 490189251Ssam} 491189251Ssam 492189251Ssam 493189251Ssam/** 494189251Ssam * wpa_derive_pmk_r1 - Derive PMK-R1 and PMKR1Name from PMK-R0 495189251Ssam * 496189251Ssam * IEEE Std 802.11r-2008 - 8.5.1.5.4 497189251Ssam */ 498189251Ssamvoid wpa_derive_pmk_r1(const u8 *pmk_r0, const u8 *pmk_r0_name, 499189251Ssam const u8 *r1kh_id, const u8 *s1kh_id, 500189251Ssam u8 *pmk_r1, u8 *pmk_r1_name) 501189251Ssam{ 502189251Ssam u8 buf[FT_R1KH_ID_LEN + ETH_ALEN]; 503189251Ssam u8 *pos; 504189251Ssam 505189251Ssam /* PMK-R1 = KDF-256(PMK-R0, "FT-R1", R1KH-ID || S1KH-ID) */ 506189251Ssam pos = buf; 507189251Ssam os_memcpy(pos, r1kh_id, FT_R1KH_ID_LEN); 508189251Ssam pos += FT_R1KH_ID_LEN; 509189251Ssam os_memcpy(pos, s1kh_id, ETH_ALEN); 510189251Ssam pos += ETH_ALEN; 511189251Ssam 512189251Ssam sha256_prf(pmk_r0, PMK_LEN, "FT-R1", buf, pos - buf, pmk_r1, PMK_LEN); 513189251Ssam 514189251Ssam wpa_derive_pmk_r1_name(pmk_r0_name, r1kh_id, s1kh_id, pmk_r1_name); 515189251Ssam} 516189251Ssam 517189251Ssam 518189251Ssam/** 519189251Ssam * wpa_pmk_r1_to_ptk - Derive PTK and PTKName from PMK-R1 520189251Ssam * 521189251Ssam * IEEE Std 802.11r-2008 - 8.5.1.5.5 522189251Ssam */ 523189251Ssamvoid wpa_pmk_r1_to_ptk(const u8 *pmk_r1, const u8 *snonce, const u8 *anonce, 524189251Ssam const u8 *sta_addr, const u8 *bssid, 525189251Ssam const u8 *pmk_r1_name, 526189251Ssam u8 *ptk, size_t ptk_len, u8 *ptk_name) 527189251Ssam{ 528189251Ssam u8 buf[2 * WPA_NONCE_LEN + 2 * ETH_ALEN]; 529189251Ssam u8 *pos, hash[32]; 530189251Ssam const u8 *addr[6]; 531189251Ssam size_t len[6]; 532189251Ssam 533189251Ssam /* 534189251Ssam * PTK = KDF-PTKLen(PMK-R1, "FT-PTK", SNonce || ANonce || 535189251Ssam * BSSID || STA-ADDR) 536189251Ssam */ 537189251Ssam pos = buf; 538189251Ssam os_memcpy(pos, snonce, WPA_NONCE_LEN); 539189251Ssam pos += WPA_NONCE_LEN; 540189251Ssam os_memcpy(pos, anonce, WPA_NONCE_LEN); 541189251Ssam pos += WPA_NONCE_LEN; 542189251Ssam os_memcpy(pos, bssid, ETH_ALEN); 543189251Ssam pos += ETH_ALEN; 544189251Ssam os_memcpy(pos, sta_addr, ETH_ALEN); 545189251Ssam pos += ETH_ALEN; 546189251Ssam 547189251Ssam sha256_prf(pmk_r1, PMK_LEN, "FT-PTK", buf, pos - buf, ptk, ptk_len); 548189251Ssam 549189251Ssam /* 550189251Ssam * PTKName = Truncate-128(SHA-256(PMKR1Name || "FT-PTKN" || SNonce || 551189251Ssam * ANonce || BSSID || STA-ADDR)) 552189251Ssam */ 553189251Ssam addr[0] = pmk_r1_name; 554189251Ssam len[0] = WPA_PMK_NAME_LEN; 555189251Ssam addr[1] = (const u8 *) "FT-PTKN"; 556189251Ssam len[1] = 7; 557189251Ssam addr[2] = snonce; 558189251Ssam len[2] = WPA_NONCE_LEN; 559189251Ssam addr[3] = anonce; 560189251Ssam len[3] = WPA_NONCE_LEN; 561189251Ssam addr[4] = bssid; 562189251Ssam len[4] = ETH_ALEN; 563189251Ssam addr[5] = sta_addr; 564189251Ssam len[5] = ETH_ALEN; 565189251Ssam 566189251Ssam sha256_vector(6, addr, len, hash); 567189251Ssam os_memcpy(ptk_name, hash, WPA_PMK_NAME_LEN); 568189251Ssam} 569189251Ssam 570189251Ssam#endif /* CONFIG_IEEE80211R */ 571