1/* 2 * EAP server/peer: EAP-PSK shared routines 3 * Copyright (c) 2004-2007, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9#ifndef EAP_PSK_COMMON_H 10#define EAP_PSK_COMMON_H 11 12 13#define EAP_PSK_RAND_LEN 16 14#define EAP_PSK_MAC_LEN 16 15#define EAP_PSK_TEK_LEN 16 16#define EAP_PSK_PSK_LEN 16 17#define EAP_PSK_AK_LEN 16 18#define EAP_PSK_KDK_LEN 16 19 20#define EAP_PSK_R_FLAG_CONT 1 21#define EAP_PSK_R_FLAG_DONE_SUCCESS 2 22#define EAP_PSK_R_FLAG_DONE_FAILURE 3 23#define EAP_PSK_E_FLAG 0x20 24 25#define EAP_PSK_FLAGS_GET_T(flags) (((flags) & 0xc0) >> 6) 26#define EAP_PSK_FLAGS_SET_T(t) ((u8) (t) << 6) 27 28#ifdef _MSC_VER 29#pragma pack(push, 1) 30#endif /* _MSC_VER */ 31 32/* EAP-PSK First Message (AS -> Supplicant) */ 33struct eap_psk_hdr_1 { 34 u8 flags; 35 u8 rand_s[EAP_PSK_RAND_LEN]; 36 /* Followed by variable length ID_S */ 37} STRUCT_PACKED; 38 39/* EAP-PSK Second Message (Supplicant -> AS) */ 40struct eap_psk_hdr_2 { 41 u8 flags; 42 u8 rand_s[EAP_PSK_RAND_LEN]; 43 u8 rand_p[EAP_PSK_RAND_LEN]; 44 u8 mac_p[EAP_PSK_MAC_LEN]; 45 /* Followed by variable length ID_P */ 46} STRUCT_PACKED; 47 48/* EAP-PSK Third Message (AS -> Supplicant) */ 49struct eap_psk_hdr_3 { 50 u8 flags; 51 u8 rand_s[EAP_PSK_RAND_LEN]; 52 u8 mac_s[EAP_PSK_MAC_LEN]; 53 /* Followed by variable length PCHANNEL */ 54} STRUCT_PACKED; 55 56/* EAP-PSK Fourth Message (Supplicant -> AS) */ 57struct eap_psk_hdr_4 { 58 u8 flags; 59 u8 rand_s[EAP_PSK_RAND_LEN]; 60 /* Followed by variable length PCHANNEL */ 61} STRUCT_PACKED; 62 63#ifdef _MSC_VER 64#pragma pack(pop) 65#endif /* _MSC_VER */ 66 67 68int __must_check eap_psk_key_setup(const u8 *psk, u8 *ak, u8 *kdk); 69int __must_check eap_psk_derive_keys(const u8 *kdk, const u8 *rand_p, u8 *tek, 70 u8 *msk, u8 *emsk); 71 72#endif /* EAP_PSK_COMMON_H */ 73