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https://git.kernel.org/pub/scm/network/wireless/iwd.git
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119 lines
3.3 KiB
C
119 lines
3.3 KiB
C
/*
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*
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* Wireless daemon for Linux
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*
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* Copyright (C) 2013-2019 Intel Corporation. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#include <asm/byteorder.h>
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#include <linux/types.h>
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enum eapol_protocol_version {
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EAPOL_PROTOCOL_VERSION_2001 = 1,
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EAPOL_PROTOCOL_VERSION_2004 = 2,
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EAPOL_PROTOCOL_VERSION_2010 = 3,
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};
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/*
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* 802.1X-2010: Table 11-5—Descriptor Type value assignments
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* The WPA key type of 254 comes from somewhere else. Seems it is a legacy
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* value that might still be used by older implementations
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*/
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enum eapol_descriptor_type {
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EAPOL_DESCRIPTOR_TYPE_RC4 = 1,
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EAPOL_DESCRIPTOR_TYPE_80211 = 2,
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EAPOL_DESCRIPTOR_TYPE_WPA = 254,
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};
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enum eapol_key_descriptor_version {
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EAPOL_KEY_DESCRIPTOR_VERSION_AKM_DEFINED = 0,
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EAPOL_KEY_DESCRIPTOR_VERSION_HMAC_MD5_ARC4 = 1,
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EAPOL_KEY_DESCRIPTOR_VERSION_HMAC_SHA1_AES = 2,
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EAPOL_KEY_DESCRIPTOR_VERSION_AES_128_CMAC_AES = 3,
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};
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struct eapol_header {
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uint8_t protocol_version;
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uint8_t packet_type;
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__be16 packet_len;
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} __attribute__ ((packed));
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struct eapol_frame {
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struct eapol_header header;
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uint8_t data[0];
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} __attribute__ ((packed));
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/* gets pointer to MIC */
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#define EAPOL_KEY_MIC(ek) ((ek)->key_data)
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/* get key data length */
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#define EAPOL_KEY_DATA_LEN(ek, mic_len) l_get_be16((ek)->key_data + (mic_len))
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/* gets pointer to key data */
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#define EAPOL_KEY_DATA(ek, mic_len) ((ek)->key_data + (mic_len) + 2)
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/* gets frame length (not including key data) */
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#define EAPOL_FRAME_LEN(mic_len) sizeof(struct eapol_key) + (mic_len) + 2
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struct eapol_key {
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struct eapol_header header;
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uint8_t descriptor_type;
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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bool key_mic:1;
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bool secure:1;
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bool error:1;
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bool request:1;
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bool encrypted_key_data:1;
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bool smk_message:1;
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uint8_t reserved2:2;
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uint8_t key_descriptor_version:3;
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bool key_type:1;
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uint8_t wpa_key_id:2; /* Bits 4-5 reserved in RSN, Key ID in WPA */
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bool install:1;
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bool key_ack:1;
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#elif defined (__BIG_ENDIAN_BITFIELD)
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uint8_t reserved2:2;
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bool smk_message:1;
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bool encrypted_key_data:1;
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bool request:1;
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bool error:1;
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bool secure:1;
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bool key_mic:1;
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bool key_ack:1;
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bool install:1;
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uint8_t wpa_key_id:2; /* Bits 4-5 reserved in RSN, Key ID in WPA */
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bool key_type:1;
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uint8_t key_descriptor_version:3;
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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__be16 key_length;
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__be64 key_replay_counter;
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uint8_t key_nonce[32];
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uint8_t eapol_key_iv[16];
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uint8_t key_rsc[8];
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uint8_t reserved[8];
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uint8_t key_data[0];
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} __attribute__ ((packed));
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const struct eapol_key *eapol_key_validate(const uint8_t *frame, size_t len,
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size_t mic_len);
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