eap_tls_common.h revision 61d9df3e62aaa0e87ad05452fcb95142159a17b6 
1/*
2 * EAP-TLS/PEAP/TTLS/FAST server common functions
3 * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9#ifndef EAP_TLS_COMMON_H
10#define EAP_TLS_COMMON_H
11
12/**
13 * struct eap_ssl_data - TLS data for EAP methods
14 */
15struct eap_ssl_data {
16	/**
17	 * conn - TLS connection context data from tls_connection_init()
18	 */
19	struct tls_connection *conn;
20
21	/**
22	 * tls_out - TLS message to be sent out in fragments
23	 */
24	struct wpabuf *tls_out;
25
26	/**
27	 * tls_out_pos - The current position in the outgoing TLS message
28	 */
29	size_t tls_out_pos;
30
31	/**
32	 * tls_out_limit - Maximum fragment size for outgoing TLS messages
33	 */
34	size_t tls_out_limit;
35
36	/**
37	 * tls_in - Received TLS message buffer for re-assembly
38	 */
39	struct wpabuf *tls_in;
40
41	/**
42	 * phase2 - Whether this TLS connection is used in EAP phase 2 (tunnel)
43	 */
44	int phase2;
45
46	/**
47	 * eap - EAP state machine allocated with eap_server_sm_init()
48	 */
49	struct eap_sm *eap;
50
51	enum { MSG, FRAG_ACK, WAIT_FRAG_ACK } state;
52	struct wpabuf tmpbuf;
53};
54
55
56/* EAP TLS Flags */
57#define EAP_TLS_FLAGS_LENGTH_INCLUDED 0x80
58#define EAP_TLS_FLAGS_MORE_FRAGMENTS 0x40
59#define EAP_TLS_FLAGS_START 0x20
60#define EAP_TLS_VERSION_MASK 0x07
61
62 /* could be up to 128 bytes, but only the first 64 bytes are used */
63#define EAP_TLS_KEY_LEN 64
64
65/* dummy type used as a flag for UNAUTH-TLS */
66#define EAP_UNAUTH_TLS_TYPE 255
67
68
69struct wpabuf * eap_tls_msg_alloc(EapType type, size_t payload_len,
70				  u8 code, u8 identifier);
71int eap_server_tls_ssl_init(struct eap_sm *sm, struct eap_ssl_data *data,
72			    int verify_peer);
73void eap_server_tls_ssl_deinit(struct eap_sm *sm, struct eap_ssl_data *data);
74u8 * eap_server_tls_derive_key(struct eap_sm *sm, struct eap_ssl_data *data,
75			       char *label, size_t len);
76struct wpabuf * eap_server_tls_build_msg(struct eap_ssl_data *data,
77					 int eap_type, int version, u8 id);
78struct wpabuf * eap_server_tls_build_ack(u8 id, int eap_type, int version);
79int eap_server_tls_phase1(struct eap_sm *sm, struct eap_ssl_data *data);
80struct wpabuf * eap_server_tls_encrypt(struct eap_sm *sm,
81				       struct eap_ssl_data *data,
82				       const struct wpabuf *plain);
83int eap_server_tls_process(struct eap_sm *sm, struct eap_ssl_data *data,
84			   struct wpabuf *respData, void *priv, int eap_type,
85			   int (*proc_version)(struct eap_sm *sm, void *priv,
86					       int peer_version),
87			   void (*proc_msg)(struct eap_sm *sm, void *priv,
88					    const struct wpabuf *respData));
89
90#endif /* EAP_TLS_COMMON_H */
91