src/eap_server/eap_tls_common.h

   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  */
  21 struct 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
  72 int eap_server_tls_ssl_init(struct eap_sm *sm, struct eap_ssl_data *data,
  73                             int verify_peer);
  74 void eap_server_tls_ssl_deinit(struct eap_sm *sm, struct eap_ssl_data *data);
  75 u8 * eap_server_tls_derive_key(struct eap_sm *sm, struct eap_ssl_data *data,
  76                                char *label, size_t len);
  77 struct wpabuf * eap_server_tls_build_msg(struct eap_ssl_data *data,
  78                                          int eap_type, int version, u8 id);
  79 struct wpabuf * eap_server_tls_build_ack(u8 id, int eap_type, int version);
  80 int eap_server_tls_phase1(struct eap_sm *sm, struct eap_ssl_data *data);
  81 struct wpabuf * eap_server_tls_encrypt(struct eap_sm *sm,
  82                                        struct eap_ssl_data *data,
  83                                        const struct wpabuf *plain);
  84 int 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 */