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      1 /*
      2  * EAP server/peer: EAP-PAX shared routines
      3  * Copyright (c) 2005-2006, Jouni Malinen <j (at) w1.fi>
      4  *
      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.
      8  *
      9  * Alternatively, this software may be distributed under the terms of BSD
     10  * license.
     11  *
     12  * See README and COPYING for more details.
     13  */
     14 
     15 #ifndef EAP_PAX_COMMON_H
     16 #define EAP_PAX_COMMON_H
     17 
     18 #ifdef _MSC_VER
     19 #pragma pack(push, 1)
     20 #endif /* _MSC_VER */
     21 
     22 struct eap_pax_hdr {
     23 	u8 code;
     24 	u8 identifier;
     25 	u16 length; /* including code, identifier, and length */
     26 	u8 type; /* EAP_TYPE_PAX */
     27 	u8 op_code;
     28 	u8 flags;
     29 	u8 mac_id;
     30 	u8 dh_group_id;
     31 	u8 public_key_id;
     32 	/* Followed by variable length payload and ICV */
     33 } STRUCT_PACKED;
     34 
     35 #ifdef _MSC_VER
     36 #pragma pack(pop)
     37 #endif /* _MSC_VER */
     38 
     39 
     40 /* op_code: */
     41 enum {
     42 	EAP_PAX_OP_STD_1 = 0x01,
     43 	EAP_PAX_OP_STD_2 = 0x02,
     44 	EAP_PAX_OP_STD_3 = 0x03,
     45 	EAP_PAX_OP_SEC_1 = 0x11,
     46 	EAP_PAX_OP_SEC_2 = 0x12,
     47 	EAP_PAX_OP_SEC_3 = 0x13,
     48 	EAP_PAX_OP_SEC_4 = 0x14,
     49 	EAP_PAX_OP_SEC_5 = 0x15,
     50 	EAP_PAX_OP_ACK = 0x21
     51 };
     52 
     53 /* flags: */
     54 #define EAP_PAX_FLAGS_MF			0x01
     55 #define EAP_PAX_FLAGS_CE			0x02
     56 #define EAP_PAX_FLAGS_AI			0x04
     57 
     58 /* mac_id: */
     59 #define EAP_PAX_MAC_HMAC_SHA1_128		0x01
     60 #define EAP_PAX_HMAC_SHA256_128			0x02
     61 
     62 /* dh_group_id: */
     63 #define EAP_PAX_DH_GROUP_NONE			0x00
     64 #define EAP_PAX_DH_GROUP_2048_MODP		0x01
     65 #define EAP_PAX_DH_GROUP_3072_MODP		0x02
     66 #define EAP_PAX_DH_GROUP_NIST_ECC_P_256		0x03
     67 
     68 /* public_key_id: */
     69 #define EAP_PAX_PUBLIC_KEY_NONE			0x00
     70 #define EAP_PAX_PUBLIC_KEY_RSAES_OAEP		0x01
     71 #define EAP_PAX_PUBLIC_KEY_RSA_PKCS1_V1_5	0x02
     72 #define EAP_PAX_PUBLIC_KEY_EL_GAMAL_NIST_ECC	0x03
     73 
     74 /* ADE type: */
     75 #define EAP_PAX_ADE_VENDOR_SPECIFIC		0x01
     76 #define EAP_PAX_ADE_CLIENT_CHANNEL_BINDING	0x02
     77 #define EAP_PAX_ADE_SERVER_CHANNEL_BINDING	0x03
     78 
     79 
     80 #define EAP_PAX_RAND_LEN 32
     81 #define EAP_PAX_MAC_LEN 16
     82 #define EAP_PAX_ICV_LEN 16
     83 #define EAP_PAX_AK_LEN 16
     84 #define EAP_PAX_MK_LEN 16
     85 #define EAP_PAX_CK_LEN 16
     86 #define EAP_PAX_ICK_LEN 16
     87 
     88 
     89 int eap_pax_kdf(u8 mac_id, const u8 *key, size_t key_len,
     90 		const char *identifier,
     91 		const u8 *entropy, size_t entropy_len,
     92 		size_t output_len, u8 *output);
     93 int eap_pax_mac(u8 mac_id, const u8 *key, size_t key_len,
     94 		const u8 *data1, size_t data1_len,
     95 		const u8 *data2, size_t data2_len,
     96 		const u8 *data3, size_t data3_len,
     97 		u8 *mac);
     98 int eap_pax_initial_key_derivation(u8 mac_id, const u8 *ak, const u8 *e,
     99 				   u8 *mk, u8 *ck, u8 *ick);
    100 
    101 #endif /* EAP_PAX_COMMON_H */
    102