src/libimcv/plugins/imv_swid/imv_swid_agent.c

   1 /*
   2  * Copyright (C) 2013-2017 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 #define _GNU_SOURCE
  17 #include <stdio.h>
  18
  19 #include "imv_swid_agent.h"
  20 #include "imv_swid_state.h"
  21
  22 #include <imcv.h>
  23 #include <imv/imv_agent.h>
  24 #include <imv/imv_msg.h>
  25 #include <ietf/ietf_attr_pa_tnc_error.h>
  26 #include "rest/rest.h"
  27 #include "tcg/seg/tcg_seg_attr_max_size.h"
  28 #include "tcg/seg/tcg_seg_attr_seg_env.h"
  29 #include "tcg/swid/tcg_swid_attr_req.h"
  30 #include "tcg/swid/tcg_swid_attr_tag_inv.h"
  31 #include "tcg/swid/tcg_swid_attr_tag_id_inv.h"
  32 #include "swid/swid_error.h"
  33 #include "swid/swid_inventory.h"
  34
  35 #include <tncif_names.h>
  36 #include <tncif_pa_subtypes.h>
  37
  38 #include <pen/pen.h>
  39 #include <utils/debug.h>
  40 #include <bio/bio_reader.h>
  41
  42 typedef struct private_imv_swid_agent_t private_imv_swid_agent_t;
  43
  44 /* Subscribed PA-TNC message subtypes */
  45 static pen_type_t msg_types[] = {
  46         { PEN_TCG, PA_SUBTYPE_TCG_SWID }
  47 };
  48
  49 /**
  50  * Flag set when corresponding attribute has been received
  51  */
  52 enum imv_swid_attr_t {
  53         IMV_SWID_ATTR_TAG_INV =    (1<<0),
  54         IMV_SWID_ATTR_TAG_ID_INV = (1<<1)
  55 };
  56
  57 /**
  58  * Private data of an imv_swid_agent_t object.
  59  */
  60 struct private_imv_swid_agent_t {
  61
  62         /**
  63          * Public members of imv_swid_agent_t
  64          */
  65         imv_agent_if_t public;
  66
  67         /**
  68          * IMV agent responsible for generic functions
  69          */
  70         imv_agent_t *agent;
  71
  72         /**
  73          * REST API to strongTNC manager
  74          */
  75         rest_t *rest_api;
  76
  77 };
  78
  79 METHOD(imv_agent_if_t, bind_functions, TNC_Result,
  80         private_imv_swid_agent_t *this, TNC_TNCS_BindFunctionPointer bind_function)
  81 {
  82         return this->agent->bind_functions(this->agent, bind_function);
  83 }
  84
  85 METHOD(imv_agent_if_t, notify_connection_change, TNC_Result,
  86         private_imv_swid_agent_t *this, TNC_ConnectionID id,
  87         TNC_ConnectionState new_state)
  88 {
  89         imv_state_t *state;
  90
  91         switch (new_state)
  92         {
  93                 case TNC_CONNECTION_STATE_CREATE:
  94                         state = imv_swid_state_create(id);
  95                         return this->agent->create_state(this->agent, state);
  96                 case TNC_CONNECTION_STATE_DELETE:
  97                         return this->agent->delete_state(this->agent, id);
  98                 default:
  99                         return this->agent->change_state(this->agent, id, new_state, NULL);
 100         }
 101 }
 102
 103 /**
 104  * Process a received message
 105  */
 106 static TNC_Result receive_msg(private_imv_swid_agent_t *this,
 107                                                           imv_state_t *state, imv_msg_t *in_msg)
 108 {
 109         imv_swid_state_t *swid_state;
 110         imv_msg_t *out_msg;
 111         enumerator_t *enumerator;
 112         pa_tnc_attr_t *attr;
 113         TNC_Result result;
 114         bool fatal_error = FALSE;
 115
 116         /* generate an outgoing PA-TNC message - we might need it */
 117         out_msg = imv_msg_create_as_reply(in_msg);
 118
 119         /* parse received PA-TNC message and handle local and remote errors */
 120         result = in_msg->receive(in_msg, out_msg, &fatal_error);
 121         if (result != TNC_RESULT_SUCCESS)
 122         {
 123                 out_msg->destroy(out_msg);
 124                 return result;
 125         }
 126
 127         swid_state = (imv_swid_state_t*)state;
 128
 129         /* analyze PA-TNC attributes */
 130         enumerator = in_msg->create_attribute_enumerator(in_msg);
 131         while (enumerator->enumerate(enumerator, &attr))
 132         {
 133                 uint32_t request_id = 0, last_eid, eid_epoch;
 134                 swid_inventory_t *inventory;
 135                 pen_type_t type;
 136
 137                 type = attr->get_type(attr);
 138
 139                 if (type.vendor_id == PEN_IETF && type.type == IETF_ATTR_PA_TNC_ERROR)
 140                 {
 141                         ietf_attr_pa_tnc_error_t *error_attr;
 142                         pen_type_t error_code;
 143                         chunk_t msg_info, description;
 144                         bio_reader_t *reader;
 145                         uint32_t max_attr_size;
 146                         bool success;
 147
 148                         error_attr = (ietf_attr_pa_tnc_error_t*)attr;
 149                         error_code = error_attr->get_error_code(error_attr);
 150
 151                         if (error_code.vendor_id == PEN_TCG)
 152                         {
 153                                 fatal_error = TRUE;
 154                                 msg_info = error_attr->get_msg_info(error_attr);
 155                                 reader = bio_reader_create(msg_info);
 156                                 success = reader->read_uint32(reader, &request_id);
 157
 158                                 DBG1(DBG_IMV, "received TCG error '%N' for request %d",
 159                                          swid_error_code_names, error_code.type, request_id);
 160                                 if (!success)
 161                                 {
 162                                         reader->destroy(reader);
 163                                         continue;
 164                                 }
 165                                 if (error_code.type == TCG_SWID_RESPONSE_TOO_LARGE)
 166                                 {
 167                                         if (!reader->read_uint32(reader, &max_attr_size))
 168                                         {
 169                                                 reader->destroy(reader);
 170                                                 continue;
 171                                         }
 172                                         DBG1(DBG_IMV, "  maximum PA-TNC attribute size is %u bytes",
 173                                                 max_attr_size);
 174                                 }
 175                                 description = reader->peek(reader);
 176                                 if (description.len)
 177                                 {
 178                                         DBG1(DBG_IMV, "  description: %.*s", description.len,
 179                                                                                                                  description.ptr);
 180                                 }
 181                                 reader->destroy(reader);
 182                         }
 183                 }
 184                 else if (type.vendor_id != PEN_TCG)
 185                 {
 186                         continue;
 187                 }
 188
 189                 switch (type.type)
 190                 {
 191                         case TCG_SWID_TAG_ID_INVENTORY:
 192                         {
 193                                 tcg_swid_attr_tag_id_inv_t *attr_cast;
 194                                 uint32_t missing;
 195                                 int tag_id_count;
 196
 197                                 state->set_action_flags(state, IMV_SWID_ATTR_TAG_ID_INV);
 198
 199                                 attr_cast = (tcg_swid_attr_tag_id_inv_t*)attr;
 200                                 request_id = attr_cast->get_request_id(attr_cast);
 201                                 last_eid = attr_cast->get_last_eid(attr_cast, &eid_epoch);
 202                                 inventory = attr_cast->get_inventory(attr_cast);
 203                                 tag_id_count = inventory->get_count(inventory);
 204                                 missing = attr_cast->get_tag_id_count(attr_cast);
 205                                 swid_state->set_missing(swid_state, missing);
 206
 207                                 DBG2(DBG_IMV, "received SWID tag ID inventory with %d item%s "
 208                                          "for request %d at eid %d of epoch 0x%08x, %d item%s to "
 209                                          "follow", tag_id_count, (tag_id_count == 1) ? "" : "s",
 210                                          request_id, last_eid, eid_epoch, missing,
 211                                          (missing == 1) ? "" : "s");
 212
 213                                 if (request_id == swid_state->get_request_id(swid_state))
 214                                 {
 215                                         swid_state->set_swid_inventory(swid_state, inventory);
 216                                         swid_state->set_count(swid_state, tag_id_count, 0,
 217                                                                                   in_msg->get_src_id(in_msg));
 218                                 }
 219                                 else
 220                                 {
 221                                         DBG1(DBG_IMV, "no workitem found for SWID tag ID inventory "
 222                                                                   "with request ID %d", request_id);
 223                                 }
 224                                 attr_cast->clear_inventory(attr_cast);
 225                                 break;
 226                          }
 227                         case TCG_SWID_TAG_INVENTORY:
 228                         {
 229                                 tcg_swid_attr_tag_inv_t *attr_cast;
 230                                 swid_tag_t *tag;
 231                                 chunk_t tag_encoding;
 232                                 json_object *jobj, *jarray, *jstring;
 233                                 char *tag_str;
 234                                 uint32_t missing;
 235                                 int tag_count;
 236                                 enumerator_t *e;
 237
 238                                 state->set_action_flags(state, IMV_SWID_ATTR_TAG_INV);
 239
 240                                 attr_cast = (tcg_swid_attr_tag_inv_t*)attr;
 241                                 request_id = attr_cast->get_request_id(attr_cast);
 242                                 last_eid = attr_cast->get_last_eid(attr_cast, &eid_epoch);
 243                                 inventory = attr_cast->get_inventory(attr_cast);
 244                                 tag_count = inventory->get_count(inventory);
 245                                 missing = attr_cast->get_tag_count(attr_cast);
 246                                 swid_state->set_missing(swid_state, missing);
 247
 248                                 DBG2(DBG_IMV, "received SWID tag inventory with %d item%s for "
 249                                          "request %d at eid %d of epoch 0x%08x, %d item%s to follow",
 250                                          tag_count, (tag_count == 1) ? "" : "s", request_id,
 251                                          last_eid, eid_epoch, missing, (missing == 1) ? "" : "s");
 252
 253                                 if (request_id == swid_state->get_request_id(swid_state))
 254                                 {
 255                                         swid_state->set_count(swid_state, 0, tag_count,
 256                                                                                   in_msg->get_src_id(in_msg));
 257
 258                                         if (this->rest_api)
 259                                         {
 260                                                 jobj = json_object_new_object();
 261                                                 jarray = json_object_new_array();
 262                                                 json_object_object_add(jobj, "data", jarray);
 263
 264                                                 e = inventory->create_enumerator(inventory);
 265                                                 while (e->enumerate(e, &tag))
 266                                                 {
 267                                                         tag_encoding = tag->get_encoding(tag);
 268                                                         tag_str = strndup(tag_encoding.ptr, tag_encoding.len);
 269                                                         DBG3(DBG_IMV, "%s", tag_str);
 270                                                         jstring = json_object_new_string(tag_str);
 271                                                         json_object_array_add(jarray, jstring);
 272                                                         free(tag_str);
 273                                                 }
 274                                                 e->destroy(e);
 275
 276                                                 if (this->rest_api->post(this->rest_api,
 277                                                                 "swid/add-tags/", jobj, NULL) != SUCCESS)
 278                                                 {
 279                                                         DBG1(DBG_IMV, "error in REST API add-tags request");
 280                                                 }
 281                                                 json_object_put(jobj);
 282                                         }
 283                                 }
 284                                 else
 285                                 {
 286                                         DBG1(DBG_IMV, "no workitem found for SWID tag inventory "
 287                                                                   "with request ID %d", request_id);
 288                                 }
 289                                 attr_cast->clear_inventory(attr_cast);
 290                                 break;
 291                         }
 292                         default:
 293                                 break;
 294                  }
 295         }
 296         enumerator->destroy(enumerator);
 297
 298         if (fatal_error)
 299         {
 300                 state->set_recommendation(state,
 301                                                                 TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION,
 302                                                                 TNC_IMV_EVALUATION_RESULT_ERROR);
 303                 result = out_msg->send_assessment(out_msg);
 304                 if (result == TNC_RESULT_SUCCESS)
 305                 {
 306                         result = this->agent->provide_recommendation(this->agent, state);
 307                 }
 308         }
 309         else
 310         {
 311                 /* send PA-TNC message with the EXCL flag set */
 312                 result = out_msg->send(out_msg, TRUE);
 313         }
 314         out_msg->destroy(out_msg);
 315
 316         return result;
 317 }
 318
 319 METHOD(imv_agent_if_t, receive_message, TNC_Result,
 320         private_imv_swid_agent_t *this, TNC_ConnectionID id,
 321         TNC_MessageType msg_type, chunk_t msg)
 322 {
 323         imv_state_t *state;
 324         imv_msg_t *in_msg;
 325         TNC_Result result;
 326
 327         if (!this->agent->get_state(this->agent, id, &state))
 328         {
 329                 return TNC_RESULT_FATAL;
 330         }
 331         in_msg = imv_msg_create_from_data(this->agent, state, id, msg_type, msg);
 332         result = receive_msg(this, state, in_msg);
 333         in_msg->destroy(in_msg);
 334
 335         return result;
 336 }
 337
 338 METHOD(imv_agent_if_t, receive_message_long, TNC_Result,
 339         private_imv_swid_agent_t *this, TNC_ConnectionID id,
 340         TNC_UInt32 src_imc_id, TNC_UInt32 dst_imv_id,
 341         TNC_VendorID msg_vid, TNC_MessageSubtype msg_subtype, chunk_t msg)
 342 {
 343         imv_state_t *state;
 344         imv_msg_t *in_msg;
 345         TNC_Result result;
 346
 347         if (!this->agent->get_state(this->agent, id, &state))
 348         {
 349                 return TNC_RESULT_FATAL;
 350         }
 351         in_msg = imv_msg_create_from_long_data(this->agent, state, id,
 352                                         src_imc_id, dst_imv_id, msg_vid, msg_subtype, msg);
 353         result = receive_msg(this, state, in_msg);
 354         in_msg->destroy(in_msg);
 355
 356         return result;
 357
 358 }
 359
 360 METHOD(imv_agent_if_t, batch_ending, TNC_Result,
 361         private_imv_swid_agent_t *this, TNC_ConnectionID id)
 362 {
 363         imv_msg_t *out_msg;
 364         imv_state_t *state;
 365         imv_session_t *session;
 366         imv_workitem_t *workitem;
 367         imv_swid_state_t *swid_state;
 368         imv_swid_handshake_state_t handshake_state;
 369         pa_tnc_attr_t *attr;
 370         TNC_IMVID imv_id;
 371         TNC_Result result = TNC_RESULT_SUCCESS;
 372         bool no_workitems = TRUE;
 373         uint32_t request_id, received;
 374         uint8_t flags;
 375         enumerator_t *enumerator;
 376
 377         if (!this->agent->get_state(this->agent, id, &state))
 378         {
 379                 return TNC_RESULT_FATAL;
 380         }
 381         swid_state = (imv_swid_state_t*)state;
 382         handshake_state = swid_state->get_handshake_state(swid_state);
 383         session = state->get_session(state);
 384         imv_id = this->agent->get_id(this->agent);
 385
 386         if (handshake_state == IMV_SWID_STATE_END)
 387         {
 388                 return TNC_RESULT_SUCCESS;
 389         }
 390
 391         /* Create an empty out message - we might need it */
 392         out_msg = imv_msg_create(this->agent, state, id, imv_id,
 393                                                          swid_state->get_imc_id(swid_state),
 394                                                          msg_types[0]);
 395
 396         if (!imcv_db)
 397         {
 398                 DBG2(DBG_IMV, "no workitems available - no evaluation possible");
 399                 state->set_recommendation(state,
 400                                                         TNC_IMV_ACTION_RECOMMENDATION_ALLOW,
 401                                                         TNC_IMV_EVALUATION_RESULT_DONT_KNOW);
 402                 result = out_msg->send_assessment(out_msg);
 403                 out_msg->destroy(out_msg);
 404                 swid_state->set_handshake_state(swid_state, IMV_SWID_STATE_END);
 405
 406                 if (result != TNC_RESULT_SUCCESS)
 407                 {
 408                         return result;
 409                 }
 410                 return this->agent->provide_recommendation(this->agent, state);
 411         }
 412
 413         /* Look for SWID tag workitem and create SWID tag request */
 414         if (handshake_state == IMV_SWID_STATE_INIT &&
 415                 session->get_policy_started(session))
 416         {
 417                 size_t max_attr_size = SWID_MAX_ATTR_SIZE;
 418                 size_t max_seg_size;
 419                 seg_contract_t *contract;
 420                 seg_contract_manager_t *contracts;
 421                 char buf[BUF_LEN];
 422
 423                 enumerator = session->create_workitem_enumerator(session);
 424                 if (enumerator)
 425                 {
 426                         while (enumerator->enumerate(enumerator, &workitem))
 427                         {
 428                                 if (workitem->get_imv_id(workitem) != TNC_IMVID_ANY ||
 429                                         workitem->get_type(workitem) != IMV_WORKITEM_SWID_TAGS)
 430                                 {
 431                                         continue;
 432                                 }
 433
 434                                 flags = TCG_SWID_ATTR_REQ_FLAG_NONE;
 435                                 if (strchr(workitem->get_arg_str(workitem), 'R'))
 436                                 {
 437                                         flags |= TCG_SWID_ATTR_REQ_FLAG_R;
 438                                 }
 439                                 if (strchr(workitem->get_arg_str(workitem), 'S'))
 440                                 {
 441                                         flags |= TCG_SWID_ATTR_REQ_FLAG_S;
 442                                 }
 443                                 if (strchr(workitem->get_arg_str(workitem), 'C'))
 444                                 {
 445                                         flags |= TCG_SWID_ATTR_REQ_FLAG_C;
 446                                 }
 447
 448                                 /* Determine maximum PA-TNC attribute segment size */
 449                                 max_seg_size = state->get_max_msg_len(state)
 450                                                                 - PA_TNC_HEADER_SIZE
 451                                                                 - PA_TNC_ATTR_HEADER_SIZE
 452                                                                 - TCG_SEG_ATTR_SEG_ENV_HEADER;
 453
 454                                 /* Announce support of PA-TNC segmentation to IMC */
 455                                 contract = seg_contract_create(msg_types[0], max_attr_size,
 456                                                                         max_seg_size, TRUE, imv_id, FALSE);
 457                                 contract->get_info_string(contract, buf, BUF_LEN, TRUE);
 458                                 DBG2(DBG_IMV, "%s", buf);
 459                                 contracts = state->get_contracts(state);
 460                                 contracts->add_contract(contracts, contract);
 461                                 attr = tcg_seg_attr_max_size_create(max_attr_size,
 462                                                                                                         max_seg_size, TRUE);
 463                                 out_msg->add_attribute(out_msg, attr);
 464
 465                                 /* Issue a SWID request */
 466                                 request_id = workitem->get_id(workitem);
 467                                 swid_state->set_request_id(swid_state, request_id);
 468                                 attr = tcg_swid_attr_req_create(flags, request_id, 0);
 469                                 out_msg->add_attribute(out_msg, attr);
 470                                 workitem->set_imv_id(workitem, imv_id);
 471                                 no_workitems = FALSE;
 472                                 DBG2(DBG_IMV, "IMV %d issues SWID request %d",
 473                                                            imv_id, request_id);
 474                                 break;
 475                         }
 476                         enumerator->destroy(enumerator);
 477
 478                         if (no_workitems)
 479                         {
 480                                 DBG2(DBG_IMV, "IMV %d has no workitems - "
 481                                                           "no evaluation requested", imv_id);
 482                                 state->set_recommendation(state,
 483                                                                 TNC_IMV_ACTION_RECOMMENDATION_ALLOW,
 484                                                                 TNC_IMV_EVALUATION_RESULT_DONT_KNOW);
 485                         }
 486                         handshake_state = IMV_SWID_STATE_WORKITEMS;
 487                         swid_state->set_handshake_state(swid_state, handshake_state);
 488                 }
 489         }
 490
 491         received = state->get_action_flags(state);
 492
 493         if (handshake_state == IMV_SWID_STATE_WORKITEMS &&
 494            (received & (IMV_SWID_ATTR_TAG_INV|IMV_SWID_ATTR_TAG_ID_INV)) &&
 495                 swid_state->get_missing(swid_state) == 0)
 496         {
 497                 TNC_IMV_Evaluation_Result eval;
 498                 TNC_IMV_Action_Recommendation rec;
 499                 char result_str[BUF_LEN], *error_str = "", *command;
 500                 char *target, *separator;
 501                 int tag_id_count, tag_count, i;
 502                 chunk_t tag_creator, unique_sw_id;
 503                 json_object *jrequest, *jresponse, *jvalue;
 504                 tcg_swid_attr_req_t *cast_attr;
 505                 swid_tag_id_t *tag_id;
 506                 status_t status = SUCCESS;
 507
 508                 if (this->rest_api && (received & IMV_SWID_ATTR_TAG_ID_INV))
 509                 {
 510                         if (asprintf(&command, "sessions/%d/swid-measurement/",
 511                                                  session->get_session_id(session, NULL, NULL)) < 0)
 512                         {
 513                                 error_str = "allocation of command string failed";
 514                                 status = FAILED;
 515                         }
 516                         else
 517                         {
 518                                 jrequest = swid_state->get_swid_inventory(swid_state);
 519                                 status = this->rest_api->post(this->rest_api, command,
 520                                                                                           jrequest, &jresponse);
 521                                 if (status == FAILED)
 522                                 {
 523                                         error_str = "error in REST API swid-measurement request";
 524                                 }
 525                                 free(command);
 526                         }
 527                 }
 528
 529                 switch (status)
 530                 {
 531                         case SUCCESS:
 532                                 enumerator = session->create_workitem_enumerator(session);
 533                                 while (enumerator->enumerate(enumerator, &workitem))
 534                                 {
 535                                         if (workitem->get_type(workitem) == IMV_WORKITEM_SWID_TAGS)
 536                                         {
 537                                                 swid_state->get_count(swid_state, &tag_id_count,
 538                                                                                                                   &tag_count);
 539                                                 snprintf(result_str, BUF_LEN, "received inventory of "
 540                                                                  "%d SWID tag ID%s and %d SWID tag%s",
 541                                                                  tag_id_count, (tag_id_count == 1) ? "" : "s",
 542                                                                  tag_count, (tag_count == 1) ? "" : "s");
 543                                                 session->remove_workitem(session, enumerator);
 544
 545                                                 eval = TNC_IMV_EVALUATION_RESULT_COMPLIANT;
 546                                                 rec = workitem->set_result(workitem, result_str, eval);
 547                                                 state->update_recommendation(state, rec, eval);
 548                                                 imcv_db->finalize_workitem(imcv_db, workitem);
 549                                                 workitem->destroy(workitem);
 550                                                 break;
 551                                         }
 552                                 }
 553                                 enumerator->destroy(enumerator);
 554                                 break;
 555                         case NEED_MORE:
 556                                 if (received & IMV_SWID_ATTR_TAG_INV)
 557                                 {
 558                                         error_str = "not all requested SWID tags were received";
 559                                         status = FAILED;
 560                                         json_object_put(jresponse);
 561                                         break;
 562                                 }
 563                                 if (json_object_get_type(jresponse) != json_type_array)
 564                                 {
 565                                         error_str = "response was not a json_array";
 566                                         status = FAILED;
 567                                         json_object_put(jresponse);
 568                                         break;
 569                                 }
 570
 571                                 /* Create a TCG SWID Request attribute */
 572                                 attr = tcg_swid_attr_req_create(TCG_SWID_ATTR_REQ_FLAG_NONE,
 573                                                                 swid_state->get_request_id(swid_state), 0);
 574                                 tag_id_count = json_object_array_length(jresponse);
 575                                 DBG1(DBG_IMV, "%d SWID tag target%s", tag_id_count,
 576                                                           (tag_id_count == 1) ? "" : "s");
 577                                 swid_state->set_missing(swid_state, tag_id_count);
 578
 579                                 for (i = 0; i < tag_id_count; i++)
 580                                 {
 581                                         jvalue = json_object_array_get_idx(jresponse, i);
 582                                         if (json_object_get_type(jvalue) != json_type_string)
 583                                         {
 584                                                 error_str = "json_string element expected in json_array";
 585                                                 status = FAILED;
 586                                                 json_object_put(jresponse);
 587                                                 break;
 588                                         }
 589                                         target = (char*)json_object_get_string(jvalue);
 590                                         DBG1(DBG_IMV, "  %s", target);
 591
 592                                         /* Separate target into tag_creator and unique_sw_id */
 593                                         separator = strstr(target, "__");
 594                                         if (!separator)
 595                                         {
 596                                                 error_str = "separation of regid from "
 597                                                                         "unique software ID failed";
 598                                                 break;
 599                                         }
 600                                         tag_creator = chunk_create(target, separator - target);
 601                                         separator += 2;
 602                                         unique_sw_id = chunk_create(separator, strlen(target) -
 603                                                                                                 tag_creator.len - 2);
 604                                         tag_id = swid_tag_id_create(tag_creator, unique_sw_id,
 605                                                                                                 chunk_empty);
 606                                         cast_attr = (tcg_swid_attr_req_t*)attr;
 607                                         cast_attr->add_target(cast_attr, tag_id);
 608                                 }
 609                                 json_object_put(jresponse);
 610
 611                                 out_msg->add_attribute(out_msg, attr);
 612                                 break;
 613                         case FAILED:
 614                         default:
 615                                 break;
 616                 }
 617
 618                 if (status == FAILED)
 619                 {
 620                         enumerator = session->create_workitem_enumerator(session);
 621                         while (enumerator->enumerate(enumerator, &workitem))
 622                         {
 623                                 if (workitem->get_type(workitem) == IMV_WORKITEM_SWID_TAGS)
 624                                 {
 625                                         session->remove_workitem(session, enumerator);
 626                                         eval = TNC_IMV_EVALUATION_RESULT_ERROR;
 627                                         rec = workitem->set_result(workitem, error_str, eval);
 628                                         state->update_recommendation(state, rec, eval);
 629                                         imcv_db->finalize_workitem(imcv_db, workitem);
 630                                         workitem->destroy(workitem);
 631                                         break;
 632                                 }
 633                         }
 634                         enumerator->destroy(enumerator);
 635                 }
 636         }
 637
 638         /* finalized all workitems ? */
 639         if (handshake_state == IMV_SWID_STATE_WORKITEMS &&
 640                 session->get_workitem_count(session, imv_id) == 0)
 641         {
 642                 result = out_msg->send_assessment(out_msg);
 643                 out_msg->destroy(out_msg);
 644                 swid_state->set_handshake_state(swid_state, IMV_SWID_STATE_END);
 645
 646                 if (result != TNC_RESULT_SUCCESS)
 647                 {
 648                         return result;
 649                 }
 650                 return this->agent->provide_recommendation(this->agent, state);
 651         }
 652
 653         /* send non-empty PA-TNC message with excl flag not set */
 654         if (out_msg->get_attribute_count(out_msg))
 655         {
 656                 result = out_msg->send(out_msg, FALSE);
 657         }
 658         out_msg->destroy(out_msg);
 659
 660         return result;
 661 }
 662
 663 METHOD(imv_agent_if_t, solicit_recommendation, TNC_Result,
 664         private_imv_swid_agent_t *this, TNC_ConnectionID id)
 665 {
 666         imv_state_t *state;
 667
 668         if (!this->agent->get_state(this->agent, id, &state))
 669         {
 670                 return TNC_RESULT_FATAL;
 671         }
 672         return this->agent->provide_recommendation(this->agent, state);
 673 }
 674
 675 METHOD(imv_agent_if_t, destroy, void,
 676         private_imv_swid_agent_t *this)
 677 {
 678         DESTROY_IF(this->rest_api);
 679         this->agent->destroy(this->agent);
 680         free(this);
 681 }
 682
 683 /**
 684  * Described in header.
 685  */
 686 imv_agent_if_t *imv_swid_agent_create(const char *name, TNC_IMVID id,
 687                                                                                  TNC_Version *actual_version)
 688 {
 689         private_imv_swid_agent_t *this;
 690         imv_agent_t *agent;
 691         char *rest_api_uri;
 692         u_int rest_api_timeout;
 693
 694         agent = imv_agent_create(name, msg_types, countof(msg_types), id,
 695                                                          actual_version);
 696         if (!agent)
 697         {
 698                 return NULL;
 699         }
 700         agent->add_non_fatal_attr_type(agent,
 701                                 pen_type_create(PEN_TCG, TCG_SEG_MAX_ATTR_SIZE_REQ));
 702
 703         INIT(this,
 704                 .public = {
 705                         .bind_functions = _bind_functions,
 706                         .notify_connection_change = _notify_connection_change,
 707                         .receive_message = _receive_message,
 708                         .receive_message_long = _receive_message_long,
 709                         .batch_ending = _batch_ending,
 710                         .solicit_recommendation = _solicit_recommendation,
 711                         .destroy = _destroy,
 712                 },
 713                 .agent = agent,
 714         );
 715
 716         rest_api_uri = lib->settings->get_str(lib->settings,
 717                                                 "%s.plugins.imv-swid.rest_api_uri", NULL, lib->ns);
 718         rest_api_timeout = lib->settings->get_int(lib->settings,
 719                                                 "%s.plugins.imv-swid.rest_api_timeout", 120, lib->ns);
 720         if (rest_api_uri)
 721         {
 722                 this->rest_api = rest_create(rest_api_uri, rest_api_timeout);
 723         }
 724
 725         return &this->public;
 726 }
 727