contrib/hostapd-0.4.9/eap_psk_common.h

   1 /*
   2  * WPA Supplicant / EAP-PSK shared routines
   3  * Copyright (c) 2004-2005, Jouni Malinen <jkmaline@cc.hut.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_PSK_COMMON_H
  16 #define EAP_PSK_COMMON_H
  17
  18
  19 #define EAP_PSK_RAND_LEN 16
  20 #define EAP_PSK_MAC_LEN 16
  21 #define EAP_PSK_TEK_LEN 16
  22 #define EAP_PSK_MSK_LEN 64
  23 #define EAP_PSK_PSK_LEN 16
  24 #define EAP_PSK_AK_LEN 16
  25 #define EAP_PSK_KDK_LEN 16
  26
  27 #define EAP_PSK_R_FLAG_CONT 1
  28 #define EAP_PSK_R_FLAG_DONE_SUCCESS 2
  29 #define EAP_PSK_R_FLAG_DONE_FAILURE 3
  30 #define EAP_PSK_E_FLAG 0x20
  31
  32 /* Shared prefix for all EAP-PSK frames */
  33 struct eap_psk_hdr {
  34         u8 code;
  35         u8 identifier;
  36         u16 length; /* including code, identifier, and length */
  37         u8 type; /* EAP_TYPE_PSK */
  38         u8 flags;
  39 } __attribute__ ((packed));
  40
  41 /* EAP-PSK First Message (AS -> Supplicant) */
  42 struct eap_psk_hdr_1 {
  43         u8 code;
  44         u8 identifier;
  45         u16 length; /* including code, identifier, and length */
  46         u8 type; /* EAP_TYPE_PSK */
  47         u8 flags;
  48         u8 rand_s[EAP_PSK_RAND_LEN];
  49         /* Followed by variable length ID_S */
  50 } __attribute__ ((packed));
  51
  52 /* EAP-PSK Second Message (Supplicant -> AS) */
  53 struct eap_psk_hdr_2 {
  54         u8 code;
  55         u8 identifier;
  56         u16 length; /* including code, identifier, and length */
  57         u8 type; /* EAP_TYPE_PSK */
  58         u8 flags;
  59         u8 rand_s[EAP_PSK_RAND_LEN];
  60         u8 rand_p[EAP_PSK_RAND_LEN];
  61         u8 mac_p[EAP_PSK_MAC_LEN];
  62         /* Followed by variable length ID_P */
  63 } __attribute__ ((packed));
  64
  65 /* EAP-PSK Third Message (AS -> Supplicant) */
  66 struct eap_psk_hdr_3 {
  67         u8 code;
  68         u8 identifier;
  69         u16 length; /* including code, identifier, and length */
  70         u8 type; /* EAP_TYPE_PSK */
  71         u8 flags;
  72         u8 rand_s[EAP_PSK_RAND_LEN];
  73         u8 mac_s[EAP_PSK_MAC_LEN];
  74         /* Followed by variable length PCHANNEL */
  75 } __attribute__ ((packed));
  76
  77 /* EAP-PSK Fourth Message (Supplicant -> AS) */
  78 struct eap_psk_hdr_4 {
  79         u8 code;
  80         u8 identifier;
  81         u16 length; /* including code, identifier, and length */
  82         u8 type; /* EAP_TYPE_PSK */
  83         u8 flags;
  84         u8 rand_s[EAP_PSK_RAND_LEN];
  85         /* Followed by variable length PCHANNEL */
  86 } __attribute__ ((packed));
  87
  88
  89 void eap_psk_key_setup(const u8 *psk, u8 *ak, u8 *kdk);
  90 void eap_psk_derive_keys(const u8 *kdk, const u8 *rand_p, u8 *tek, u8 *msk);
  91
  92 #endif /* EAP_PSK_COMMON_H */