contrib/hostapd/eap_sake_common.h

   1 /*
   2  * EAP server/peer: EAP-SAKE shared routines
   3  * Copyright (c) 2006, 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 EAP_SAKE_COMMON_H
  16 #define EAP_SAKE_COMMON_H
  17
  18 #define EAP_SAKE_VERSION 2
  19
  20 #define EAP_SAKE_SUBTYPE_CHALLENGE 1
  21 #define EAP_SAKE_SUBTYPE_CONFIRM 2
  22 #define EAP_SAKE_SUBTYPE_AUTH_REJECT 3
  23 #define EAP_SAKE_SUBTYPE_IDENTITY 4
  24
  25 #define EAP_SAKE_AT_RAND_S 1
  26 #define EAP_SAKE_AT_RAND_P 2
  27 #define EAP_SAKE_AT_MIC_S 3
  28 #define EAP_SAKE_AT_MIC_P 4
  29 #define EAP_SAKE_AT_SERVERID 5
  30 #define EAP_SAKE_AT_PEERID 6
  31 #define EAP_SAKE_AT_SPI_S 7
  32 #define EAP_SAKE_AT_SPI_P 8
  33 #define EAP_SAKE_AT_ANY_ID_REQ 9
  34 #define EAP_SAKE_AT_PERM_ID_REQ 10
  35 #define EAP_SAKE_AT_ENCR_DATA 128
  36 #define EAP_SAKE_AT_IV 129
  37 #define EAP_SAKE_AT_PADDING 130
  38 #define EAP_SAKE_AT_NEXT_TMPID 131
  39 #define EAP_SAKE_AT_MSK_LIFE 132
  40
  41 #define EAP_SAKE_RAND_LEN 16
  42 #define EAP_SAKE_MIC_LEN 16
  43 #define EAP_SAKE_ROOT_SECRET_LEN 16
  44 #define EAP_SAKE_SMS_LEN 16
  45 #define EAP_SAKE_TEK_AUTH_LEN 16
  46 #define EAP_SAKE_TEK_CIPHER_LEN 16
  47 #define EAP_SAKE_TEK_LEN (EAP_SAKE_TEK_AUTH_LEN + EAP_SAKE_TEK_CIPHER_LEN)
  48
  49 #ifdef _MSC_VER
  50 #pragma pack(push, 1)
  51 #endif /* _MSC_VER */
  52
  53 struct eap_sake_hdr {
  54         u8 code;
  55         u8 identifier;
  56         u16 length;
  57         u8 type; /* EAP_TYPE_SAKE */
  58         u8 version; /* EAP_SAKE_VERSION */
  59         u8 session_id;
  60         u8 subtype;
  61 } STRUCT_PACKED;
  62
  63 #ifdef _MSC_VER
  64 #pragma pack(pop)
  65 #endif /* _MSC_VER */
  66
  67
  68 struct eap_sake_parse_attr {
  69         const u8 *rand_s;
  70         const u8 *rand_p;
  71         const u8 *mic_s;
  72         const u8 *mic_p;
  73         const u8 *serverid;
  74         size_t serverid_len;
  75         const u8 *peerid;
  76         size_t peerid_len;
  77         const u8 *spi_s;
  78         size_t spi_s_len;
  79         const u8 *spi_p;
  80         size_t spi_p_len;
  81         const u8 *any_id_req;
  82         const u8 *perm_id_req;
  83         const u8 *encr_data;
  84         size_t encr_data_len;
  85         const u8 *iv;
  86         size_t iv_len;
  87         const u8 *next_tmpid;
  88         size_t next_tmpid_len;
  89         const u8 *msk_life;
  90 };
  91
  92 int eap_sake_parse_attributes(const u8 *buf, size_t len,
  93                               struct eap_sake_parse_attr *attr);
  94 void eap_sake_derive_keys(const u8 *root_secret_a, const u8 *root_secret_b,
  95                           const u8 *rand_s, const u8 *rand_p,
  96                           u8 *tek, u8 *msk, u8 *emsk);
  97 int eap_sake_compute_mic(const u8 *tek_auth,
  98                          const u8 *rand_s, const u8 *rand_p,
  99                          const u8 *serverid, size_t serverid_len,
 100                          const u8 *peerid, size_t peerid_len,
 101                          int peer, const u8 *eap, size_t eap_len,
 102                          const u8 *mic_pos, u8 *mic);
 103
 104 #endif /* EAP_SAKE_COMMON_H */