2 * EAP server/peer: EAP-PSK shared routines
3 * Copyright (c) 2004-2007, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
9 #ifndef EAP_PSK_COMMON_H
10 #define EAP_PSK_COMMON_H
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
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
25 #define EAP_PSK_FLAGS_GET_T(flags) (((flags) & 0xc0) >> 6)
26 #define EAP_PSK_FLAGS_SET_T(t) ((u8) (t) << 6)
32 /* EAP-PSK First Message (AS -> Supplicant) */
33 struct eap_psk_hdr_1 {
35 u8 rand_s[EAP_PSK_RAND_LEN];
36 /* Followed by variable length ID_S */
39 /* EAP-PSK Second Message (Supplicant -> AS) */
40 struct eap_psk_hdr_2 {
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 */
48 /* EAP-PSK Third Message (AS -> Supplicant) */
49 struct eap_psk_hdr_3 {
51 u8 rand_s[EAP_PSK_RAND_LEN];
52 u8 mac_s[EAP_PSK_MAC_LEN];
53 /* Followed by variable length PCHANNEL */
56 /* EAP-PSK Fourth Message (Supplicant -> AS) */
57 struct eap_psk_hdr_4 {
59 u8 rand_s[EAP_PSK_RAND_LEN];
60 /* Followed by variable length PCHANNEL */
68 int __must_check eap_psk_key_setup(const u8 *psk, u8 *ak, u8 *kdk);
69 int __must_check eap_psk_derive_keys(const u8 *kdk, const u8 *rand_p, u8 *tek,
72 #endif /* EAP_PSK_COMMON_H */