333 lines
9.6 KiB
C
333 lines
9.6 KiB
C
/*
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* WPA definitions shared between hostapd and wpa_supplicant
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* Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#include "os.h"
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#ifndef WPA_COMMON_H
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#define WPA_COMMON_H
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#define WPA_MAX_SSID_LEN 32
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/* IEEE 802.11i */
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#define PMKID_LEN 16
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#define PMK_LEN 32
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#define WPA_REPLAY_COUNTER_LEN 8
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#define WPA_NONCE_LEN 32
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#define WPA_KEY_RSC_LEN 8
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#define WPA_GMK_LEN 32
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#define WPA_GTK_MAX_LEN 32
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#define WPA_SELECTOR_LEN 4
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#define WPA_VERSION 1
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#define RSN_SELECTOR_LEN 4
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#define RSN_VERSION 1
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#define RSN_SELECTOR(a, b, c, d) \
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((((u32) (a)) << 24) | (((u32) (b)) << 16) | (((u32) (c)) << 8) | \
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(u32) (d))
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#define WPA_AUTH_KEY_MGMT_NONE RSN_SELECTOR(0x00, 0x50, 0xf2, 0)
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#define WPA_AUTH_KEY_MGMT_UNSPEC_802_1X RSN_SELECTOR(0x00, 0x50, 0xf2, 1)
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#define WPA_AUTH_KEY_MGMT_PSK_OVER_802_1X RSN_SELECTOR(0x00, 0x50, 0xf2, 2)
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#define WPA_CIPHER_SUITE_NONE RSN_SELECTOR(0x00, 0x50, 0xf2, 0)
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#define WPA_CIPHER_SUITE_WEP40 RSN_SELECTOR(0x00, 0x50, 0xf2, 1)
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#define WPA_CIPHER_SUITE_TKIP RSN_SELECTOR(0x00, 0x50, 0xf2, 2)
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#if 0
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#define WPA_CIPHER_SUITE_WRAP RSN_SELECTOR(0x00, 0x50, 0xf2, 3)
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#endif
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#define WPA_CIPHER_SUITE_CCMP RSN_SELECTOR(0x00, 0x50, 0xf2, 4)
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#define WPA_CIPHER_SUITE_WEP104 RSN_SELECTOR(0x00, 0x50, 0xf2, 5)
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#define RSN_AUTH_KEY_MGMT_UNSPEC_802_1X RSN_SELECTOR(0x00, 0x0f, 0xac, 1)
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#define RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X RSN_SELECTOR(0x00, 0x0f, 0xac, 2)
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#ifdef CONFIG_IEEE80211R
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#define RSN_AUTH_KEY_MGMT_FT_802_1X RSN_SELECTOR(0x00, 0x0f, 0xac, 3)
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#define RSN_AUTH_KEY_MGMT_FT_PSK RSN_SELECTOR(0x00, 0x0f, 0xac, 4)
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#endif /* CONFIG_IEEE80211R */
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#define RSN_AUTH_KEY_MGMT_802_1X_SHA256 RSN_SELECTOR(0x00, 0x0f, 0xac, 5)
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#define RSN_AUTH_KEY_MGMT_PSK_SHA256 RSN_SELECTOR(0x00, 0x0f, 0xac, 6)
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#define RSN_CIPHER_SUITE_NONE RSN_SELECTOR(0x00, 0x0f, 0xac, 0)
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#define RSN_CIPHER_SUITE_WEP40 RSN_SELECTOR(0x00, 0x0f, 0xac, 1)
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#define RSN_CIPHER_SUITE_TKIP RSN_SELECTOR(0x00, 0x0f, 0xac, 2)
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#if 0
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#define RSN_CIPHER_SUITE_WRAP RSN_SELECTOR(0x00, 0x0f, 0xac, 3)
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#endif
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#define RSN_CIPHER_SUITE_CCMP RSN_SELECTOR(0x00, 0x0f, 0xac, 4)
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#define RSN_CIPHER_SUITE_WEP104 RSN_SELECTOR(0x00, 0x0f, 0xac, 5)
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#ifdef CONFIG_IEEE80211W
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#define RSN_CIPHER_SUITE_AES_128_CMAC RSN_SELECTOR(0x00, 0x0f, 0xac, 6)
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#endif /* CONFIG_IEEE80211W */
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#define RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED RSN_SELECTOR(0x00, 0x0f, 0xac, 7)
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#define RSN_CIPHER_SUITE_GCMP RSN_SELECTOR(0x00, 0x0f, 0xac, 8)
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/* EAPOL-Key Key Data Encapsulation
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* GroupKey and PeerKey require encryption, otherwise, encryption is optional.
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*/
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#define RSN_KEY_DATA_GROUPKEY RSN_SELECTOR(0x00, 0x0f, 0xac, 1)
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#if 0
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#define RSN_KEY_DATA_STAKEY RSN_SELECTOR(0x00, 0x0f, 0xac, 2)
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#endif
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#define RSN_KEY_DATA_MAC_ADDR RSN_SELECTOR(0x00, 0x0f, 0xac, 3)
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#define RSN_KEY_DATA_PMKID RSN_SELECTOR(0x00, 0x0f, 0xac, 4)
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#ifdef CONFIG_PEERKEY
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#define RSN_KEY_DATA_SMK RSN_SELECTOR(0x00, 0x0f, 0xac, 5)
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#define RSN_KEY_DATA_NONCE RSN_SELECTOR(0x00, 0x0f, 0xac, 6)
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#define RSN_KEY_DATA_LIFETIME RSN_SELECTOR(0x00, 0x0f, 0xac, 7)
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#define RSN_KEY_DATA_ERROR RSN_SELECTOR(0x00, 0x0f, 0xac, 8)
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#endif /* CONFIG_PEERKEY */
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#ifdef CONFIG_IEEE80211W
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#define RSN_KEY_DATA_IGTK RSN_SELECTOR(0x00, 0x0f, 0xac, 9)
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#endif /* CONFIG_IEEE80211W */
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#define WPA_OUI_TYPE RSN_SELECTOR(0x00, 0x50, 0xf2, 1)
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#define RSN_SELECTOR_PUT(a, val) WPA_PUT_BE32((u8 *) (a), (val))
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#define RSN_SELECTOR_GET(a) WPA_GET_BE32((const u8 *) (a))
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#define RSN_NUM_REPLAY_COUNTERS_1 0
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#define RSN_NUM_REPLAY_COUNTERS_2 1
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#define RSN_NUM_REPLAY_COUNTERS_4 2
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#define RSN_NUM_REPLAY_COUNTERS_16 3
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#ifdef _MSC_VER
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#pragma pack(push, 1)
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#endif /* _MSC_VER */
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#ifdef CONFIG_IEEE80211W
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#define WPA_IGTK_LEN 16
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#endif /* CONFIG_IEEE80211W */
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/* IEEE 802.11, 7.3.2.25.3 RSN Capabilities */
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#define WPA_CAPABILITY_PREAUTH BIT(0)
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#define WPA_CAPABILITY_NO_PAIRWISE BIT(1)
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/* B2-B3: PTKSA Replay Counter */
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/* B4-B5: GTKSA Replay Counter */
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#define WPA_CAPABILITY_MFPR BIT(6)
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#define WPA_CAPABILITY_MFPC BIT(7)
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#define WPA_CAPABILITY_PEERKEY_ENABLED BIT(9)
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/* IEEE 802.11r */
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#define MOBILITY_DOMAIN_ID_LEN 2
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#define FT_R0KH_ID_MAX_LEN 48
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#define FT_R1KH_ID_LEN 6
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#define WPA_PMK_NAME_LEN 16
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/* IEEE 802.11, 8.5.2 EAPOL-Key frames */
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#define WPA_KEY_INFO_TYPE_MASK ((u16) (BIT(0) | BIT(1) | BIT(2)))
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#define WPA_KEY_INFO_TYPE_HMAC_MD5_RC4 BIT(0)
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#define WPA_KEY_INFO_TYPE_HMAC_SHA1_AES BIT(1)
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#define WPA_KEY_INFO_TYPE_AES_128_CMAC 3
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#define WPA_KEY_INFO_KEY_TYPE BIT(3) /* 1 = Pairwise, 0 = Group key */
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/* bit4..5 is used in WPA, but is reserved in IEEE 802.11i/RSN */
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#define WPA_KEY_INFO_KEY_INDEX_MASK (BIT(4) | BIT(5))
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#define WPA_KEY_INFO_KEY_INDEX_SHIFT 4
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#define WPA_KEY_INFO_INSTALL BIT(6) /* pairwise */
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#define WPA_KEY_INFO_TXRX BIT(6) /* group */
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#define WPA_KEY_INFO_ACK BIT(7)
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#define WPA_KEY_INFO_MIC BIT(8)
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#define WPA_KEY_INFO_SECURE BIT(9)
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#define WPA_KEY_INFO_ERROR BIT(10)
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#define WPA_KEY_INFO_REQUEST BIT(11)
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#define WPA_KEY_INFO_ENCR_KEY_DATA BIT(12) /* IEEE 802.11i/RSN only */
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#define WPA_KEY_INFO_SMK_MESSAGE BIT(13)
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struct wpa_eapol_key {
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u8 type;
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/* Note: key_info, key_length, and key_data_length are unaligned */
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u8 key_info[2]; /* big endian */
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u8 key_length[2]; /* big endian */
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u8 replay_counter[WPA_REPLAY_COUNTER_LEN];
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u8 key_nonce[WPA_NONCE_LEN];
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u8 key_iv[16];
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u8 key_rsc[WPA_KEY_RSC_LEN];
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u8 key_id[8]; /* Reserved in IEEE 802.11i/RSN */
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u8 key_mic[16];
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u8 key_data_length[2]; /* big endian */
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/* followed by key_data_length bytes of key_data */
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} STRUCT_PACKED;
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/**
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* struct wpa_ptk - WPA Pairwise Transient Key
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* IEEE Std 802.11i-2004 - 8.5.1.2 Pairwise key hierarchy
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*/
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struct wpa_ptk {
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u8 kck[16]; /* EAPOL-Key Key Confirmation Key (KCK) */
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u8 kek[16]; /* EAPOL-Key Key Encryption Key (KEK) */
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u8 tk1[16]; /* Temporal Key 1 (TK1) */
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union {
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u8 tk2[16]; /* Temporal Key 2 (TK2) */
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struct {
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u8 tx_mic_key[8];
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u8 rx_mic_key[8];
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} auth;
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} u;
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} STRUCT_PACKED;
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struct wpa_gtk_data {
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enum wpa_alg alg;
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int tx, key_rsc_len, keyidx;
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u8 gtk[32];
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int gtk_len;
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};
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/* WPA IE version 1
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* 00-50-f2:1 (OUI:OUI type)
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* 0x01 0x00 (version; little endian)
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* (all following fields are optional:)
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* Group Suite Selector (4 octets) (default: TKIP)
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* Pairwise Suite Count (2 octets, little endian) (default: 1)
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* Pairwise Suite List (4 * n octets) (default: TKIP)
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* Authenticated Key Management Suite Count (2 octets, little endian)
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* (default: 1)
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* Authenticated Key Management Suite List (4 * n octets)
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* (default: unspec 802.1X)
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* WPA Capabilities (2 octets, little endian) (default: 0)
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*/
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struct wpa_ie_hdr {
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u8 elem_id;
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u8 len;
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u8 oui[4]; /* 24-bit OUI followed by 8-bit OUI type */
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u8 version[2]; /* little endian */
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} STRUCT_PACKED;
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/* 1/4: PMKID
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* 2/4: RSN IE
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* 3/4: one or two RSN IEs + GTK IE (encrypted)
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* 4/4: empty
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* 1/2: GTK IE (encrypted)
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* 2/2: empty
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*/
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/* RSN IE version 1
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* 0x01 0x00 (version; little endian)
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* (all following fields are optional:)
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* Group Suite Selector (4 octets) (default: CCMP)
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* Pairwise Suite Count (2 octets, little endian) (default: 1)
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* Pairwise Suite List (4 * n octets) (default: CCMP)
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* Authenticated Key Management Suite Count (2 octets, little endian)
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* (default: 1)
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* Authenticated Key Management Suite List (4 * n octets)
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* (default: unspec 802.1X)
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* RSN Capabilities (2 octets, little endian) (default: 0)
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* PMKID Count (2 octets) (default: 0)
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* PMKID List (16 * n octets)
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* Management Group Cipher Suite (4 octets) (default: AES-128-CMAC)
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*/
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struct rsn_ie_hdr {
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u8 elem_id; /* WLAN_EID_RSN */
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u8 len;
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u8 version[2]; /* little endian */
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} STRUCT_PACKED;
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#ifdef CONFIG_PEERKEY
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enum {
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STK_MUI_4WAY_STA_AP = 1,
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STK_MUI_4WAY_STAT_STA = 2,
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STK_MUI_GTK = 3,
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STK_MUI_SMK = 4
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};
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enum {
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STK_ERR_STA_NR = 1,
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STK_ERR_STA_NRSN = 2,
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STK_ERR_CPHR_NS = 3,
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STK_ERR_NO_STSL = 4
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};
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#endif /* CONFIG_PEERKEY */
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struct rsn_error_kde {
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be16 mui;
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be16 error_type;
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} STRUCT_PACKED;
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#ifdef CONFIG_IEEE80211W
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struct wpa_igtk_kde {
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u8 keyid[2];
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u8 pn[6];
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u8 igtk[WPA_IGTK_LEN];
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} STRUCT_PACKED;
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#endif /* CONFIG_IEEE80211W */
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#ifdef CONFIG_IEEE80211R
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struct rsn_mdie {
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u8 mobility_domain[MOBILITY_DOMAIN_ID_LEN];
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u8 ft_capab;
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} STRUCT_PACKED;
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#define RSN_FT_CAPAB_FT_OVER_DS BIT(0)
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#define RSN_FT_CAPAB_FT_RESOURCE_REQ_SUPP BIT(1)
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struct rsn_ftie {
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u8 mic_control[2];
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u8 mic[16];
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u8 anonce[WPA_NONCE_LEN];
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u8 snonce[WPA_NONCE_LEN];
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/* followed by optional parameters */
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} STRUCT_PACKED;
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#define FTIE_SUBELEM_R1KH_ID 1
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#define FTIE_SUBELEM_GTK 2
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#define FTIE_SUBELEM_R0KH_ID 3
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#define FTIE_SUBELEM_IGTK 4
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struct rsn_rdie {
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u8 id;
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u8 descr_count;
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le16 status_code;
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} STRUCT_PACKED;
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#endif /* CONFIG_IEEE80211R */
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struct wpa_ie_data {
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int proto;
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int pairwise_cipher;
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int group_cipher;
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int key_mgmt;
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int capabilities;
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size_t num_pmkid;
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const u8 *pmkid;
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int mgmt_group_cipher;
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};
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const char * wpa_cipher_txt(int cipher);
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int wpa_parse_wpa_ie_rsn(const u8 *rsn_ie, size_t rsn_ie_len,
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struct wpa_ie_data *data);
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int wpa_eapol_key_mic(const u8 *key, int ver, const u8 *buf, size_t len,
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u8 *mic);
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int wpa_compare_rsn_ie(int ft_initial_assoc,
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const u8 *ie1, size_t ie1len,
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const u8 *ie2, size_t ie2len);
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void wpa_pmk_to_ptk(const u8 *pmk, size_t pmk_len, const char *label,
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const u8 *addr1, const u8 *addr2,
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const u8 *nonce1, const u8 *nonce2,
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u8 *ptk, size_t ptk_len, int use_sha256);
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void rsn_pmkid(const u8 *pmk, size_t pmk_len, const u8 *aa, const u8 *spa,
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u8 *pmkid, int use_sha256);
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#endif /* WPA_COMMON_H */
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