src/eap_common/eap_psk_common.h

   1 /*
   2  * EAP server/peer: EAP-PSK shared routines
   3  * Copyright (c) 2004-2007, 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_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_PSK_LEN 16
  23 #define EAP_PSK_AK_LEN 16
  24 #define EAP_PSK_KDK_LEN 16
  25
  26 #define EAP_PSK_R_FLAG_CONT 1
  27 #define EAP_PSK_R_FLAG_DONE_SUCCESS 2
  28 #define EAP_PSK_R_FLAG_DONE_FAILURE 3
  29 #define EAP_PSK_E_FLAG 0x20
  30
  31 #define EAP_PSK_FLAGS_GET_T(flags) (((flags) & 0xc0) >> 6)
  32 #define EAP_PSK_FLAGS_SET_T(t) ((u8) (t) << 6)
  33
  34 #ifdef _MSC_VER
  35 #pragma pack(push, 1)
  36 #endif /* _MSC_VER */
  37
  38 /* EAP-PSK First Message (AS -> Supplicant) */
  39 struct eap_psk_hdr_1 {
  40         u8 flags;
  41         u8 rand_s[EAP_PSK_RAND_LEN];
  42         /* Followed by variable length ID_S */
  43 } STRUCT_PACKED;
  44
  45 /* EAP-PSK Second Message (Supplicant -> AS) */
  46 struct eap_psk_hdr_2 {
  47         u8 flags;
  48         u8 rand_s[EAP_PSK_RAND_LEN];
  49         u8 rand_p[EAP_PSK_RAND_LEN];
  50         u8 mac_p[EAP_PSK_MAC_LEN];
  51         /* Followed by variable length ID_P */
  52 } STRUCT_PACKED;
  53
  54 /* EAP-PSK Third Message (AS -> Supplicant) */
  55 struct eap_psk_hdr_3 {
  56         u8 flags;
  57         u8 rand_s[EAP_PSK_RAND_LEN];
  58         u8 mac_s[EAP_PSK_MAC_LEN];
  59         /* Followed by variable length PCHANNEL */
  60 } STRUCT_PACKED;
  61
  62 /* EAP-PSK Fourth Message (Supplicant -> AS) */
  63 struct eap_psk_hdr_4 {
  64         u8 flags;
  65         u8 rand_s[EAP_PSK_RAND_LEN];
  66         /* Followed by variable length PCHANNEL */
  67 } STRUCT_PACKED;
  68
  69 #ifdef _MSC_VER
  70 #pragma pack(pop)
  71 #endif /* _MSC_VER */
  72
  73
  74 int __must_check eap_psk_key_setup(const u8 *psk, u8 *ak, u8 *kdk);
  75 int __must_check eap_psk_derive_keys(const u8 *kdk, const u8 *rand_p, u8 *tek,
  76                                      u8 *msk, u8 *emsk);
  77
  78 #endif /* EAP_PSK_COMMON_H */