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1 /*
2  * EAP server/peer: EAP-PAX shared routines
3  * Copyright (c) 2005-2006, Jouni Malinen <j@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