src/libpts/plugins/imc_swid/imc_swid_state.c

   1 /*
   2  * Copyright (C) 2013 Andreas Steffen
   3  * HSR Hochschule fuer Technik Rapperswil
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  */
  15
  16 #include "imc_swid_state.h"
  17
  18 #include <tncif_names.h>
  19
  20 #include <utils/debug.h>
  21
  22 typedef struct private_imc_swid_state_t private_imc_swid_state_t;
  23
  24 /**
  25  * Private data of an imc_swid_state_t object.
  26  */
  27 struct private_imc_swid_state_t {
  28
  29         /**
  30          * Public members of imc_swid_state_t
  31          */
  32         imc_swid_state_t public;
  33
  34         /**
  35          * TNCCS connection ID
  36          */
  37         TNC_ConnectionID connection_id;
  38
  39         /**
  40          * TNCCS connection state
  41          */
  42         TNC_ConnectionState state;
  43
  44         /**
  45          * Assessment/Evaluation Result
  46          */
  47         TNC_IMV_Evaluation_Result result;
  48
  49         /**
  50          * Does the TNCCS connection support long message types?
  51          */
  52         bool has_long;
  53
  54         /**
  55          * Does the TNCCS connection support exclusive delivery?
  56          */
  57         bool has_excl;
  58
  59         /**
  60          * Maximum PA-TNC message size for this TNCCS connection
  61          */
  62         u_int32_t max_msg_len;
  63
  64         /**
  65          * Event ID Epoch
  66          */
  67         u_int32_t eid_epoch;
  68 };
  69
  70 METHOD(imc_state_t, get_connection_id, TNC_ConnectionID,
  71         private_imc_swid_state_t *this)
  72 {
  73         return this->connection_id;
  74 }
  75
  76 METHOD(imc_state_t, has_long, bool,
  77         private_imc_swid_state_t *this)
  78 {
  79         return this->has_long;
  80 }
  81
  82 METHOD(imc_state_t, has_excl, bool,
  83         private_imc_swid_state_t *this)
  84 {
  85         return this->has_excl;
  86 }
  87
  88 METHOD(imc_state_t, set_flags, void,
  89         private_imc_swid_state_t *this, bool has_long, bool has_excl)
  90 {
  91         this->has_long = has_long;
  92         this->has_excl = has_excl;
  93 }
  94
  95 METHOD(imc_state_t, set_max_msg_len, void,
  96         private_imc_swid_state_t *this, u_int32_t max_msg_len)
  97 {
  98         this->max_msg_len = max_msg_len;
  99 }
 100
 101 METHOD(imc_state_t, get_max_msg_len, u_int32_t,
 102         private_imc_swid_state_t *this)
 103 {
 104         return this->max_msg_len;
 105 }
 106
 107 METHOD(imc_state_t, change_state, void,
 108         private_imc_swid_state_t *this, TNC_ConnectionState new_state)
 109 {
 110         this->state = new_state;
 111 }
 112
 113 METHOD(imc_state_t, set_result, void,
 114         private_imc_swid_state_t *this, TNC_IMCID id,
 115         TNC_IMV_Evaluation_Result result)
 116 {
 117         this->result = result;
 118 }
 119
 120 METHOD(imc_state_t, get_result, bool,
 121         private_imc_swid_state_t *this, TNC_IMCID id,
 122         TNC_IMV_Evaluation_Result *result)
 123 {
 124         if (result)
 125         {
 126                 *result = this->result;
 127         }
 128         return this->result != TNC_IMV_EVALUATION_RESULT_DONT_KNOW;
 129 }
 130
 131 METHOD(imc_state_t, destroy, void,
 132         private_imc_swid_state_t *this)
 133 {
 134         free(this);
 135 }
 136
 137 METHOD(imc_swid_state_t, get_eid_epoch, u_int32_t,
 138         private_imc_swid_state_t *this)
 139 {
 140         return this->eid_epoch;
 141 }
 142
 143 /**
 144  * Described in header.
 145  */
 146 imc_state_t *imc_swid_state_create(TNC_ConnectionID connection_id)
 147 {
 148         private_imc_swid_state_t *this;
 149         u_int32_t eid_epoch;
 150         nonce_gen_t *ng;
 151
 152         ng = lib->crypto->create_nonce_gen(lib->crypto);
 153         if (!ng || !ng->get_nonce(ng, 4, (u_int8_t*)&eid_epoch))
 154         {
 155                 DBG1(DBG_TNC, "failed to generate random EID epoch value");
 156                 DESTROY_IF(ng);
 157                 return NULL;
 158         }
 159         ng->destroy(ng);
 160
 161         DBG1(DBG_IMC, "creating random EID epoch 0x%08x", eid_epoch);
 162
 163         INIT(this,
 164                 .public = {
 165                         .interface = {
 166                                 .get_connection_id = _get_connection_id,
 167                                 .has_long = _has_long,
 168                                 .has_excl = _has_excl,
 169                                 .set_flags = _set_flags,
 170                                 .set_max_msg_len = _set_max_msg_len,
 171                                 .get_max_msg_len = _get_max_msg_len,
 172                                 .change_state = _change_state,
 173                                 .set_result = _set_result,
 174                                 .get_result = _get_result,
 175                                 .destroy = _destroy,
 176                         },
 177                         .get_eid_epoch = _get_eid_epoch,
 178                 },
 179                 .state = TNC_CONNECTION_STATE_CREATE,
 180                 .result = TNC_IMV_EVALUATION_RESULT_DONT_KNOW,
 181                 .connection_id = connection_id,
 182                 .eid_epoch = eid_epoch,
 183         );
 184
 185
 186         return &this->public.interface;
 187 }
 188
 189