2 * EAP server/peer: EAP-PSK shared routines
3 * Copyright (c) 2004-2007, Jouni Malinen <j@w1.fi>
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.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
15 #ifndef EAP_PSK_COMMON_H
16 #define EAP_PSK_COMMON_H
22 #define EAP_PSK_RAND_LEN 16
23 #define EAP_PSK_MAC_LEN 16
24 #define EAP_PSK_TEK_LEN 16
25 #define EAP_PSK_PSK_LEN 16
26 #define EAP_PSK_AK_LEN 16
27 #define EAP_PSK_KDK_LEN 16
29 #define EAP_PSK_R_FLAG_CONT 1
30 #define EAP_PSK_R_FLAG_DONE_SUCCESS 2
31 #define EAP_PSK_R_FLAG_DONE_FAILURE 3
32 #define EAP_PSK_E_FLAG 0x20
34 #define EAP_PSK_FLAGS_GET_T(flags) (((flags) & 0xc0) >> 6)
35 #define EAP_PSK_FLAGS_SET_T(t) ((u8) (t) << 6)
41 /* EAP-PSK First Message (AS -> Supplicant) */
42 struct eap_psk_hdr_1 {
44 u8 rand_s[EAP_PSK_RAND_LEN];
45 /* Followed by variable length ID_S */
48 /* EAP-PSK Second Message (Supplicant -> AS) */
49 struct eap_psk_hdr_2 {
51 u8 rand_s[EAP_PSK_RAND_LEN];
52 u8 rand_p[EAP_PSK_RAND_LEN];
53 u8 mac_p[EAP_PSK_MAC_LEN];
54 /* Followed by variable length ID_P */
57 /* EAP-PSK Third Message (AS -> Supplicant) */
58 struct eap_psk_hdr_3 {
60 u8 rand_s[EAP_PSK_RAND_LEN];
61 u8 mac_s[EAP_PSK_MAC_LEN];
62 /* Followed by variable length PCHANNEL */
65 /* EAP-PSK Fourth Message (Supplicant -> AS) */
66 struct eap_psk_hdr_4 {
68 u8 rand_s[EAP_PSK_RAND_LEN];
69 /* Followed by variable length PCHANNEL */
77 int __must_check eap_psk_key_setup(const u8 *psk, u8 *ak, u8 *kdk);
78 int __must_check eap_psk_derive_keys(const u8 *kdk, const u8 *rand_p, u8 *tek,
85 #endif /* EAP_PSK_COMMON_H */