dist/wpa/src/eap_peer/eap_tls_common.h

   1 /*
   2  * EAP peer: EAP-TLS/PEAP/TTLS/FAST common functions
   3  * Copyright (c) 2004-2006, 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_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         u8 *tls_out;
  31
  32         /**
  33          * tls_out_len - Total length of the outgoing TLS message
  34          */
  35         size_t tls_out_len;
  36
  37         /**
  38          * tls_out_pos - The current position in the outgoing TLS message
  39          */
  40         size_t tls_out_pos;
  41
  42         /**
  43          * tls_out_limit - Maximum fragment size for outgoing TLS messages
  44          */
  45         size_t tls_out_limit;
  46
  47         /**
  48          * tls_in - Received TLS message buffer for re-assembly
  49          */
  50         u8 *tls_in;
  51
  52         /**
  53          * tls_in_len - Number of bytes of the received TLS message in tls_in
  54          */
  55         size_t tls_in_len;
  56
  57         /**
  58          * tls_in_left - Number of remaining bytes in the incoming TLS message
  59          */
  60         size_t tls_in_left;
  61
  62         /**
  63          * tls_in_total - Total number of bytes in the incoming TLS message
  64          */
  65         size_t tls_in_total;
  66
  67         /**
  68          * phase2 - Whether this TLS connection is used in EAP phase 2 (tunnel)
  69          */
  70         int phase2;
  71
  72         /**
  73          * include_tls_length - Whether the TLS length field is included even
  74          * if the TLS data is not fragmented
  75          */
  76         int include_tls_length;
  77
  78         /**
  79          * tls_ia - Whether TLS/IA is enabled for this TLS connection
  80          */
  81         int tls_ia;
  82
  83         /**
  84          * eap - Pointer to EAP state machine allocated with eap_peer_sm_init()
  85          */
  86         struct eap_sm *eap;
  87 };
  88
  89
  90 /* EAP TLS Flags */
  91 #define EAP_TLS_FLAGS_LENGTH_INCLUDED 0x80
  92 #define EAP_TLS_FLAGS_MORE_FRAGMENTS 0x40
  93 #define EAP_TLS_FLAGS_START 0x20
  94 #define EAP_PEAP_VERSION_MASK 0x07
  95
  96  /* could be up to 128 bytes, but only the first 64 bytes are used */
  97 #define EAP_TLS_KEY_LEN 64
  98
  99
 100 int eap_peer_tls_ssl_init(struct eap_sm *sm, struct eap_ssl_data *data,
 101                           struct eap_peer_config *config);
 102 void eap_peer_tls_ssl_deinit(struct eap_sm *sm, struct eap_ssl_data *data);
 103 u8 * eap_peer_tls_derive_key(struct eap_sm *sm, struct eap_ssl_data *data,
 104                              const char *label, size_t len);
 105 const u8 * eap_peer_tls_data_reassemble(
 106         struct eap_ssl_data *data, const u8 *in_data, size_t in_len,
 107         size_t *out_len, int *need_more_input);
 108 int eap_peer_tls_process_helper(struct eap_sm *sm, struct eap_ssl_data *data,
 109                                 EapType eap_type, int peap_version,
 110                                 u8 id, const u8 *in_data, size_t in_len,
 111                                 struct wpabuf **out_data);
 112 struct wpabuf * eap_peer_tls_build_ack(u8 id, EapType eap_type,
 113                                        int peap_version);
 114 int eap_peer_tls_reauth_init(struct eap_sm *sm, struct eap_ssl_data *data);
 115 int eap_peer_tls_status(struct eap_sm *sm, struct eap_ssl_data *data,
 116                         char *buf, size_t buflen, int verbose);
 117 const u8 * eap_peer_tls_process_init(struct eap_sm *sm,
 118                                      struct eap_ssl_data *data,
 119                                      EapType eap_type,
 120                                      struct eap_method_ret *ret,
 121                                      const struct wpabuf *reqData,
 122                                      size_t *len, u8 *flags);
 123 void eap_peer_tls_reset_input(struct eap_ssl_data *data);
 124 void eap_peer_tls_reset_output(struct eap_ssl_data *data);
 125 int eap_peer_tls_decrypt(struct eap_sm *sm, struct eap_ssl_data *data,
 126                          const struct wpabuf *in_data,
 127                          struct wpabuf **in_decrypted);
 128 int eap_peer_tls_encrypt(struct eap_sm *sm, struct eap_ssl_data *data,
 129                          EapType eap_type, int peap_version, u8 id,
 130                          const struct wpabuf *in_data,
 131                          struct wpabuf **out_data);
 132 int eap_peer_select_phase2_methods(struct eap_peer_config *config,
 133                                    const char *prefix,
 134                                    struct eap_method_type **types,
 135                                    size_t *num_types);
 136 int eap_peer_tls_phase2_nak(struct eap_method_type *types, size_t num_types,
 137                             struct eap_hdr *hdr, struct wpabuf **resp);
 138
 139 #endif /* EAP_TLS_COMMON_H */