1 /* 2 * EAP server/peer: EAP-PSK shared routines 3 * Copyright (c) 2004-2007, Jouni Malinen <j (at) 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 */ 79
