eap_tls_common.h revision 8d520ff1dc2da35cdca849e982051b86468016d8 
1/*
2 * EAP-TLS/PEAP/TTLS/FAST server common functions
3 * Copyright (c) 2004-2009, 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_TLS_COMMON_H
16#define EAP_TLS_COMMON_H
17
18/**
19 * struct eap_ssl_data - TLS data for EAP methods
20 */
21struct eap_ssl_data {
22	/**
23	 * conn - TLS connection context data from tls_connection_init()
24	 */
25	struct tls_connection *conn;
26
27	/**
28	 * tls_out - TLS message to be sent out in fragments
29	 */
30	struct wpabuf *tls_out;
31
32	/**
33	 * tls_out_pos - The current position in the outgoing TLS message
34	 */
35	size_t tls_out_pos;
36
37	/**
38	 * tls_out_limit - Maximum fragment size for outgoing TLS messages
39	 */
40	size_t tls_out_limit;
41
42	/**
43	 * tls_in - Received TLS message buffer for re-assembly
44	 */
45	struct wpabuf *tls_in;
46
47	/**
48	 * phase2 - Whether this TLS connection is used in EAP phase 2 (tunnel)
49	 */
50	int phase2;
51
52	/**
53	 * eap - EAP state machine allocated with eap_server_sm_init()
54	 */
55	struct eap_sm *eap;
56
57	enum { MSG, FRAG_ACK, WAIT_FRAG_ACK } state;
58	struct wpabuf tmpbuf;
59};
60
61
62/* EAP TLS Flags */
63#define EAP_TLS_FLAGS_LENGTH_INCLUDED 0x80
64#define EAP_TLS_FLAGS_MORE_FRAGMENTS 0x40
65#define EAP_TLS_FLAGS_START 0x20
66#define EAP_TLS_VERSION_MASK 0x07
67
68 /* could be up to 128 bytes, but only the first 64 bytes are used */
69#define EAP_TLS_KEY_LEN 64
70
71
72int eap_server_tls_ssl_init(struct eap_sm *sm, struct eap_ssl_data *data,
73			    int verify_peer);
74void eap_server_tls_ssl_deinit(struct eap_sm *sm, struct eap_ssl_data *data);
75u8 * eap_server_tls_derive_key(struct eap_sm *sm, struct eap_ssl_data *data,
76			       char *label, size_t len);
77struct wpabuf * eap_server_tls_build_msg(struct eap_ssl_data *data,
78					 int eap_type, int version, u8 id);
79struct wpabuf * eap_server_tls_build_ack(u8 id, int eap_type, int version);
80int eap_server_tls_phase1(struct eap_sm *sm, struct eap_ssl_data *data);
81struct wpabuf * eap_server_tls_encrypt(struct eap_sm *sm,
82				       struct eap_ssl_data *data,
83				       const struct wpabuf *plain);
84int eap_server_tls_process(struct eap_sm *sm, struct eap_ssl_data *data,
85			   struct wpabuf *respData, void *priv, int eap_type,
86			   int (*proc_version)(struct eap_sm *sm, void *priv,
87					       int peer_version),
88			   void (*proc_msg)(struct eap_sm *sm, void *priv,
89					    const struct wpabuf *respData));
90
91#endif /* EAP_TLS_COMMON_H */
92