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/*
* EAP server/peer: EAP-PSK shared routines
* Copyright (c) 2004-2005, Jouni Malinen <jkmaline@cc.hut.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#ifndef EAP_PSK_COMMON_H
#define EAP_PSK_COMMON_H
#define EAP_PSK_RAND_LEN 16
#define EAP_PSK_MAC_LEN 16
#define EAP_PSK_TEK_LEN 16
#define EAP_PSK_PSK_LEN 16
#define EAP_PSK_AK_LEN 16
#define EAP_PSK_KDK_LEN 16
#define EAP_PSK_R_FLAG_CONT 1
#define EAP_PSK_R_FLAG_DONE_SUCCESS 2
#define EAP_PSK_R_FLAG_DONE_FAILURE 3
#define EAP_PSK_E_FLAG 0x20
#ifdef _MSC_VER
#pragma pack(push, 1)
#endif /* _MSC_VER */
/* Shared prefix for all EAP-PSK frames */
struct eap_psk_hdr {
u8 code;
u8 identifier;
u16 length; /* including code, identifier, and length */
u8 type; /* EAP_TYPE_PSK */
u8 flags;
} STRUCT_PACKED;
/* EAP-PSK First Message (AS -> Supplicant) */
struct eap_psk_hdr_1 {
u8 code;
u8 identifier;
u16 length; /* including code, identifier, and length */
u8 type; /* EAP_TYPE_PSK */
u8 flags;
u8 rand_s[EAP_PSK_RAND_LEN];
/* Followed by variable length ID_S */
} STRUCT_PACKED;
/* EAP-PSK Second Message (Supplicant -> AS) */
struct eap_psk_hdr_2 {
u8 code;
u8 identifier;
u16 length; /* including code, identifier, and length */
u8 type; /* EAP_TYPE_PSK */
u8 flags;
u8 rand_s[EAP_PSK_RAND_LEN];
u8 rand_p[EAP_PSK_RAND_LEN];
u8 mac_p[EAP_PSK_MAC_LEN];
/* Followed by variable length ID_P */
} STRUCT_PACKED;
/* EAP-PSK Third Message (AS -> Supplicant) */
struct eap_psk_hdr_3 {
u8 code;
u8 identifier;
u16 length; /* including code, identifier, and length */
u8 type; /* EAP_TYPE_PSK */
u8 flags;
u8 rand_s[EAP_PSK_RAND_LEN];
u8 mac_s[EAP_PSK_MAC_LEN];
/* Followed by variable length PCHANNEL */
} STRUCT_PACKED;
/* EAP-PSK Fourth Message (Supplicant -> AS) */
struct eap_psk_hdr_4 {
u8 code;
u8 identifier;
u16 length; /* including code, identifier, and length */
u8 type; /* EAP_TYPE_PSK */
u8 flags;
u8 rand_s[EAP_PSK_RAND_LEN];
/* Followed by variable length PCHANNEL */
} STRUCT_PACKED;
#ifdef _MSC_VER
#pragma pack(pop)
#endif /* _MSC_VER */
void eap_psk_key_setup(const u8 *psk, u8 *ak, u8 *kdk);
void eap_psk_derive_keys(const u8 *kdk, const u8 *rand_p, u8 *tek, u8 *msk);
#endif /* EAP_PSK_COMMON_H */
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