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104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
/*
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* EAP server/peer: EAP-PSK shared routines
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* Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#ifndef EAP_PSK_COMMON_H
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#define EAP_PSK_COMMON_H
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#define EAP_PSK_RAND_LEN 16
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#define EAP_PSK_MAC_LEN 16
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#define EAP_PSK_TEK_LEN 16
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#define EAP_PSK_PSK_LEN 16
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#define EAP_PSK_AK_LEN 16
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#define EAP_PSK_KDK_LEN 16
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#define EAP_PSK_R_FLAG_CONT 1
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#define EAP_PSK_R_FLAG_DONE_SUCCESS 2
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#define EAP_PSK_R_FLAG_DONE_FAILURE 3
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#define EAP_PSK_E_FLAG 0x20
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#define EAP_PSK_FLAGS_GET_T(flags) (((flags) & 0xc0) >> 6)
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#define EAP_PSK_FLAGS_SET_T(t) ((u8) (t) << 6)
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#ifdef _MSC_VER
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#pragma pack(push, 1)
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#endif /* _MSC_VER */
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/* Shared prefix for all EAP-PSK frames */
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struct eap_psk_hdr {
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u8 code;
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u8 identifier;
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u16 length; /* including code, identifier, and length */
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u8 type; /* EAP_TYPE_PSK */
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u8 flags;
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} STRUCT_PACKED;
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/* EAP-PSK First Message (AS -> Supplicant) */
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struct eap_psk_hdr_1 {
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u8 code;
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u8 identifier;
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u16 length; /* including code, identifier, and length */
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u8 type; /* EAP_TYPE_PSK */
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u8 flags;
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u8 rand_s[EAP_PSK_RAND_LEN];
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/* Followed by variable length ID_S */
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} STRUCT_PACKED;
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/* EAP-PSK Second Message (Supplicant -> AS) */
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struct eap_psk_hdr_2 {
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u8 code;
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u8 identifier;
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u16 length; /* including code, identifier, and length */
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u8 type; /* EAP_TYPE_PSK */
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u8 flags;
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u8 rand_s[EAP_PSK_RAND_LEN];
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u8 rand_p[EAP_PSK_RAND_LEN];
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u8 mac_p[EAP_PSK_MAC_LEN];
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/* Followed by variable length ID_P */
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} STRUCT_PACKED;
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/* EAP-PSK Third Message (AS -> Supplicant) */
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struct eap_psk_hdr_3 {
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u8 code;
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u8 identifier;
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u16 length; /* including code, identifier, and length */
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u8 type; /* EAP_TYPE_PSK */
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u8 flags;
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u8 rand_s[EAP_PSK_RAND_LEN];
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u8 mac_s[EAP_PSK_MAC_LEN];
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/* Followed by variable length PCHANNEL */
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} STRUCT_PACKED;
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/* EAP-PSK Fourth Message (Supplicant -> AS) */
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struct eap_psk_hdr_4 {
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u8 code;
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u8 identifier;
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u16 length; /* including code, identifier, and length */
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u8 type; /* EAP_TYPE_PSK */
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u8 flags;
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u8 rand_s[EAP_PSK_RAND_LEN];
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/* Followed by variable length PCHANNEL */
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} STRUCT_PACKED;
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#ifdef _MSC_VER
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#pragma pack(pop)
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#endif /* _MSC_VER */
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void eap_psk_key_setup(const u8 *psk, u8 *ak, u8 *kdk);
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void eap_psk_derive_keys(const u8 *kdk, const u8 *rand_p, u8 *tek, u8 *msk,
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u8 *emsk);
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#endif /* EAP_PSK_COMMON_H */
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