src/libimcv/plugins/imv_attestation/imv_attestation.c

   1 /*
   2  * Copyright (C) 2011 Sansar Choinyambuu
   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 "imv_attestation_state.h"
  17
  18 #include <imv/imv_agent.h>
  19 #include <pa_tnc/pa_tnc_msg.h>
  20 #include <ietf/ietf_attr.h>
  21 #include <ietf/ietf_attr_pa_tnc_error.h>
  22 #include <ietf/ietf_attr_product_info.h>
  23
  24 #include <libpts.h>
  25
  26 #include <pts/pts_database.h>
  27 #include <pts/pts_creds.h>
  28 #include <pts/pts_error.h>
  29
  30 #include <tcg/tcg_attr.h>
  31 #include <tcg/tcg_pts_attr_proto_caps.h>
  32 #include <tcg/tcg_pts_attr_dh_nonce_params_req.h>
  33 #include <tcg/tcg_pts_attr_dh_nonce_params_resp.h>
  34 #include <tcg/tcg_pts_attr_dh_nonce_finish.h>
  35 #include <tcg/tcg_pts_attr_meas_algo.h>
  36 #include <tcg/tcg_pts_attr_get_tpm_version_info.h>
  37 #include <tcg/tcg_pts_attr_tpm_version_info.h>
  38 #include <tcg/tcg_pts_attr_get_aik.h>
  39 #include <tcg/tcg_pts_attr_aik.h>
  40 #include <tcg/tcg_pts_attr_req_funct_comp_evid.h>
  41 #include <tcg/tcg_pts_attr_gen_attest_evid.h>
  42 #include <tcg/tcg_pts_attr_simple_comp_evid.h>
  43 #include <tcg/tcg_pts_attr_simple_evid_final.h>
  44 #include <tcg/tcg_pts_attr_req_file_meas.h>
  45 #include <tcg/tcg_pts_attr_file_meas.h>
  46 #include <tcg/tcg_pts_attr_req_file_meta.h>
  47 #include <tcg/tcg_pts_attr_unix_file_meta.h>
  48
  49 #include <tncif_pa_subtypes.h>
  50
  51 #include <pen/pen.h>
  52 #include <debug.h>
  53 #include <credentials/credential_manager.h>
  54
  55 /* IMV definitions */
  56
  57 static const char imv_name[] = "Attestation";
  58
  59 #define IMV_VENDOR_ID                   PEN_TCG
  60 #define IMV_SUBTYPE                             PA_SUBTYPE_TCG_PTS
  61
  62 static imv_agent_t *imv_attestation;
  63
  64 /**
  65  * Supported PTS measurement algorithms
  66  */
  67 static pts_meas_algorithms_t supported_algorithms = 0;
  68
  69 /**
  70  * PTS file measurement database
  71  */
  72 static pts_database_t *pts_db;
  73
  74 /**
  75  * PTS credentials
  76  */
  77 static pts_creds_t *pts_creds;
  78
  79 /**
  80  * PTS credential manager
  81  */
  82 static credential_manager_t *pts_credmgr;
  83
  84 /**
  85  * see section 3.7.1 of TCG TNC IF-IMV Specification 1.2
  86  */
  87 TNC_Result TNC_IMV_Initialize(TNC_IMVID imv_id,
  88                                                           TNC_Version min_version,
  89                                                           TNC_Version max_version,
  90                                                           TNC_Version *actual_version)
  91 {
  92         char *hash_alg, *uri, *cadir;
  93
  94         if (imv_attestation)
  95         {
  96                 DBG1(DBG_IMV, "IMV \"%s\" has already been initialized", imv_name);
  97                 return TNC_RESULT_ALREADY_INITIALIZED;
  98         }
  99         if (!pts_meas_probe_algorithms(&supported_algorithms))
 100         {
 101                 return TNC_RESULT_FATAL;
 102         }
 103         imv_attestation = imv_agent_create(imv_name, IMV_VENDOR_ID, IMV_SUBTYPE,
 104                                                                            imv_id, actual_version);
 105         if (!imv_attestation)
 106         {
 107                 return TNC_RESULT_FATAL;
 108         }
 109
 110         libpts_init();
 111
 112         if (min_version > TNC_IFIMV_VERSION_1 || max_version < TNC_IFIMV_VERSION_1)
 113         {
 114                 DBG1(DBG_IMV, "no common IF-IMV version");
 115                 return TNC_RESULT_NO_COMMON_VERSION;
 116         }
 117
 118         /**
 119          * Specify supported PTS measurement algorithms
 120          *
 121          * sha1 :  PTS_MEAS_ALGO_SHA1
 122          * sha256: PTS_MEAS_ALGO_SHA1 | PTS_MEAS_ALGO_SHA256
 123          * sha384: PTS_MEAS_ALGO_SHA1 | PTS_MEAS_ALGO_SHA256 | PTS_MEAS_ALGO_SHA384
 124          *
 125          * we expect the PTS-IMC to select the strongest supported algorithm
 126          */
 127         hash_alg = lib->settings->get_str(lib->settings,
 128                                 "libimcv.plugins.imv-attestation.hash_algorithm", "sha256");
 129         if (!strcaseeq(hash_alg, "sha384") && !strcaseeq(hash_alg, "sha2_384"))
 130         {
 131                 /* remove SHA384 algorithm */
 132                 supported_algorithms &= ~PTS_MEAS_ALGO_SHA384;
 133         }
 134         if (strcaseeq(hash_alg, "sha1"))
 135         {
 136                 /* remove SHA256 algorithm */
 137                 supported_algorithms &= ~PTS_MEAS_ALGO_SHA256;
 138         }
 139
 140         /* create a PTS credential manager */
 141         pts_credmgr = credential_manager_create();
 142
 143         /* create PTS credential set */
 144         cadir = lib->settings->get_str(lib->settings,
 145                                 "libimcv.plugins.imv-attestation.cadir", NULL);
 146         pts_creds = pts_creds_create(cadir);
 147         if (pts_creds)
 148         {
 149                 pts_credmgr->add_set(pts_credmgr, pts_creds->get_set(pts_creds));
 150         }
 151
 152         /* attach file measurement database */
 153         uri = lib->settings->get_str(lib->settings,
 154                                 "libimcv.plugins.imv-attestation.database", NULL);
 155         pts_db = pts_database_create(uri);
 156
 157         return TNC_RESULT_SUCCESS;
 158 }
 159
 160 /**
 161  * see section 3.7.2 of TCG TNC IF-IMV Specification 1.2
 162  */
 163 TNC_Result TNC_IMV_NotifyConnectionChange(TNC_IMVID imv_id,
 164                                                                                   TNC_ConnectionID connection_id,
 165                                                                                   TNC_ConnectionState new_state)
 166 {
 167         imv_state_t *state;
 168         imv_attestation_state_t *attestation_state;
 169         TNC_Result result;
 170
 171         if (!imv_attestation)
 172         {
 173                 DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
 174                 return TNC_RESULT_NOT_INITIALIZED;
 175         }
 176         switch (new_state)
 177         {
 178                 case TNC_CONNECTION_STATE_CREATE:
 179                         state = imv_attestation_state_create(connection_id);
 180                         return imv_attestation->create_state(imv_attestation, state);
 181                 case TNC_CONNECTION_STATE_DELETE:
 182                         return imv_attestation->delete_state(imv_attestation, connection_id);
 183                 case TNC_CONNECTION_STATE_HANDSHAKE:
 184                         result = imv_attestation->change_state(imv_attestation, connection_id,
 185                                                                                                    new_state, &state);
 186                         if (result != TNC_RESULT_SUCCESS)
 187                         {
 188                                 return result;
 189                         }
 190                         attestation_state = (imv_attestation_state_t*)state;
 191
 192                         /* TODO: Get some configurations */
 193
 194                         return TNC_RESULT_SUCCESS;
 195                 default:
 196                         return imv_attestation->change_state(imv_attestation, connection_id,
 197                                                                                                  new_state, NULL);
 198         }
 199 }
 200
 201 static TNC_Result send_message(TNC_ConnectionID connection_id)
 202 {
 203         pa_tnc_msg_t *msg;
 204         pa_tnc_attr_t *attr;
 205         pts_t *pts;
 206         imv_state_t *state;
 207         imv_attestation_state_t *attestation_state;
 208         imv_attestation_handshake_state_t handshake_state;
 209         TNC_Result result;
 210
 211         if (!imv_attestation->get_state(imv_attestation, connection_id, &state))
 212         {
 213                 return TNC_RESULT_FATAL;
 214         }
 215         attestation_state = (imv_attestation_state_t*)state;
 216         handshake_state = attestation_state->get_handshake_state(attestation_state);
 217         pts = attestation_state->get_pts(attestation_state);
 218
 219         msg = pa_tnc_msg_create();
 220
 221
 222         /* Switch on the attribute type IMV has received */
 223         switch (handshake_state)
 224         {
 225                 case IMV_ATTESTATION_STATE_INIT:
 226                 {
 227                         pts_proto_caps_flag_t flags;
 228
 229                         /* Send Request Protocol Capabilities attribute */
 230                         flags = pts->get_proto_caps(pts);
 231                         attr = tcg_pts_attr_proto_caps_create(flags, TRUE);
 232                         attr->set_noskip_flag(attr, TRUE);
 233                         msg->add_attribute(msg, attr);
 234
 235                         /* Send Measurement Algorithms attribute */
 236                         attr = tcg_pts_attr_meas_algo_create(supported_algorithms, FALSE);
 237                         attr->set_noskip_flag(attr, TRUE);
 238                         msg->add_attribute(msg, attr);
 239
 240                         attestation_state->set_handshake_state(attestation_state,
 241                                                                                 IMV_ATTESTATION_STATE_MEAS);
 242                         break;
 243                 }
 244
 245                 case IMV_ATTESTATION_STATE_MEAS:
 246                 {
 247                         enumerator_t *enumerator;
 248                         u_int32_t delimiter = SOLIDUS_UTF;
 249                         char *platform_info, *pathname;
 250                         u_int16_t request_id;
 251                         int id, type;
 252                         bool is_dir;
 253
 254                         attestation_state->set_handshake_state(attestation_state,
 255                                                                                 IMV_ATTESTATION_STATE_COMP_EVID);
 256
 257                         /* Does the PTS-IMC have TPM support? */
 258                         if (pts->get_proto_caps(pts) & PTS_PROTO_CAPS_T)
 259                         {
 260                                 /* Send Get TPM Version attribute */
 261                                 attr = tcg_pts_attr_get_tpm_version_info_create();
 262                                 attr->set_noskip_flag(attr, TRUE);
 263                                 msg->add_attribute(msg, attr);
 264
 265                                 /* Send Get AIK attribute */
 266                                 attr = tcg_pts_attr_get_aik_create();
 267                                 attr->set_noskip_flag(attr, TRUE);
 268                                 msg->add_attribute(msg, attr);
 269                         }
 270
 271                         /* Get Platform and OS of the PTS-IMC */
 272                         platform_info = pts->get_platform_info(pts);
 273
 274                         if (!pts_db || !platform_info)
 275                         {
 276                                 DBG1(DBG_IMV, "%s%s%s not available",
 277                                         (pts_db) ? "" : "pts database",
 278                                         (!pts_db && !platform_info) ? "and" : "",
 279                                         (platform_info) ? "" : "platform info");
 280                                 break;
 281                         }
 282                         DBG1(DBG_IMV, "platform is '%s'", platform_info);
 283
 284                         /* Send Request File Metadata attribute */
 285                         attr = tcg_pts_attr_req_file_meta_create(FALSE, SOLIDUS_UTF, "/etc/tnc_config");
 286                         attr->set_noskip_flag(attr, TRUE);
 287                         msg->add_attribute(msg, attr);
 288
 289                         /* Send Request File Measurement attribute */
 290                         enumerator = pts_db->create_file_enumerator(pts_db, platform_info);
 291                         if (!enumerator)
 292                         {
 293                                 break;
 294                         }
 295                         while (enumerator->enumerate(enumerator, &id, &type, &pathname))
 296                         {
 297                                 is_dir = (type != 0);
 298                                 request_id = attestation_state->add_request(attestation_state,
 299                                                                                                                         id, is_dir);
 300                                 DBG2(DBG_IMV, "measurement request %d for %s '%s'",
 301                                          request_id, is_dir ? "directory" : "file", pathname);
 302                                 attr = tcg_pts_attr_req_file_meas_create(is_dir, request_id,
 303                                                                                                          delimiter, pathname);
 304                                 attr->set_noskip_flag(attr, TRUE);
 305                                 msg->add_attribute(msg, attr);
 306                         }
 307                         enumerator->destroy(enumerator);
 308                         break;
 309                 }
 310                 case IMV_ATTESTATION_STATE_COMP_EVID:
 311                 {
 312                         pts_attr_req_funct_comp_evid_flag_t flags;
 313                         u_int32_t sub_comp_depth;
 314                         pts_qualifier_t qualifier;
 315                         pts_funct_comp_name_t name;
 316
 317                         attestation_state->set_handshake_state(attestation_state,
 318                                                                                 IMV_ATTESTATION_STATE_END);
 319
 320                         flags = PTS_REQ_FUNC_COMP_FLAG_PCR;
 321                         sub_comp_depth = 1;
 322                         qualifier.kernel = FALSE;
 323                         qualifier.sub_component = FALSE;
 324                         qualifier.type = PTS_FUNC_COMP_TYPE_ALL;
 325                         name = PTS_FUNC_COMP_NAME_BIOS;
 326
 327                         /* Send Request Functional Component Evidence attribute */
 328                         attr = tcg_pts_attr_req_funct_comp_evid_create(flags, sub_comp_depth,
 329                                                                                                                 PEN_TCG, qualifier, name);
 330                         attr->set_noskip_flag(attr, TRUE);
 331                         msg->add_attribute(msg, attr);
 332                         /* Send Generate Attestation Evidence attribute */
 333                         attr = tcg_pts_attr_gen_attest_evid_create();
 334                         attr->set_noskip_flag(attr, TRUE);
 335                         msg->add_attribute(msg, attr);
 336
 337                         break;
 338                 }
 339                 case IMV_ATTESTATION_STATE_IML:
 340                         DBG1(DBG_IMV, "Attestation IMV has nothing to send: \"%s\"",
 341                                  handshake_state);
 342                         return TNC_RESULT_FATAL;
 343                 default:
 344                         DBG1(DBG_IMV, "Attestation IMV is in unknown state: \"%s\"",
 345                                  handshake_state);
 346                         return TNC_RESULT_FATAL;
 347         }
 348
 349         msg->build(msg);
 350         result = imv_attestation->send_message(imv_attestation, connection_id,
 351                                                                                    msg->get_encoding(msg));
 352         msg->destroy(msg);
 353
 354         return result;
 355 }
 356
 357 /**
 358  * see section 3.7.3 of TCG TNC IF-IMV Specification 1.2
 359  */
 360 TNC_Result TNC_IMV_ReceiveMessage(TNC_IMVID imv_id,
 361                                                                   TNC_ConnectionID connection_id,
 362                                                                   TNC_BufferReference msg,
 363                                                                   TNC_UInt32 msg_len,
 364                                                                   TNC_MessageType msg_type)
 365 {
 366         pa_tnc_msg_t *pa_tnc_msg;
 367         pa_tnc_attr_t *attr;
 368         imv_state_t *state;
 369         imv_attestation_state_t *attestation_state;
 370         pts_t *pts;
 371         enumerator_t *enumerator;
 372         TNC_Result result;
 373         bool fatal_error = FALSE;
 374         bool measurement_error = FALSE;
 375
 376         if (!imv_attestation)
 377         {
 378                 DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
 379                 return TNC_RESULT_NOT_INITIALIZED;
 380         }
 381
 382         /* get current IMV state */
 383         if (!imv_attestation->get_state(imv_attestation, connection_id, &state))
 384         {
 385                 return TNC_RESULT_FATAL;
 386         }
 387         attestation_state = (imv_attestation_state_t*)state;
 388         pts = attestation_state->get_pts(attestation_state);
 389
 390         /* parse received PA-TNC message and automatically handle any errors */
 391         result = imv_attestation->receive_message(imv_attestation, connection_id,
 392                                                                            chunk_create(msg, msg_len), msg_type,
 393                                                                            &pa_tnc_msg);
 394
 395         /* no parsed PA-TNC attributes available if an error occurred */
 396         if (!pa_tnc_msg)
 397         {
 398                 return result;
 399         }
 400
 401         /* analyze PA-TNC attributes */
 402         enumerator = pa_tnc_msg->create_attribute_enumerator(pa_tnc_msg);
 403         while (enumerator->enumerate(enumerator, &attr))
 404         {
 405                 if (attr->get_vendor_id(attr) == PEN_IETF)
 406                 {
 407                         if (attr->get_type(attr) == IETF_ATTR_PA_TNC_ERROR)
 408                         {
 409                                 ietf_attr_pa_tnc_error_t *error_attr;
 410                                 pen_t error_vendor_id;
 411                                 pa_tnc_error_code_t error_code;
 412                                 chunk_t msg_info, attr_info;
 413                                 u_int32_t offset;
 414
 415                                 error_attr = (ietf_attr_pa_tnc_error_t*)attr;
 416                                 error_vendor_id = error_attr->get_vendor_id(error_attr);
 417                                 error_code = error_attr->get_error_code(error_attr);
 418                                 msg_info = error_attr->get_msg_info(error_attr);
 419
 420                                 if (error_vendor_id == PEN_IETF)
 421                                 {
 422                                         DBG1(DBG_IMV, "received PA-TNC error '%N' "
 423                                                                   "concerning message %#B",
 424                                                  pa_tnc_error_code_names, error_code, &msg_info);
 425
 426                                         switch (error_code)
 427                                         {
 428                                                 case PA_ERROR_INVALID_PARAMETER:
 429                                                         offset = error_attr->get_offset(error_attr);
 430                                                         DBG1(DBG_IMV, "  occurred at offset of %u bytes",
 431                                                                  offset);
 432                                                         break;
 433                                                 case PA_ERROR_ATTR_TYPE_NOT_SUPPORTED:
 434                                                         attr_info = error_attr->get_attr_info(error_attr);
 435                                                         DBG1(DBG_IMV, "  unsupported attribute %#B",
 436                                                                  &attr_info);
 437                                                         break;
 438                                                 default:
 439                                                         break;
 440                                         }
 441                                 }
 442                                 else if (error_vendor_id == PEN_TCG)
 443                                 {
 444                                         DBG1(DBG_IMV, "received TCG-PTS error '%N'",
 445                                                  pts_error_code_names, error_code);
 446                                         DBG1(DBG_IMV, "error information: %B", &msg_info);
 447                                 }
 448                                 fatal_error = TRUE;
 449                         }
 450                         else if (attr->get_type(attr) == IETF_ATTR_PRODUCT_INFORMATION)
 451                         {
 452                                 ietf_attr_product_info_t *attr_cast;
 453                                 char *platform_info;
 454
 455                                 attr_cast = (ietf_attr_product_info_t*)attr;
 456                                 platform_info = attr_cast->get_info(attr_cast, NULL, NULL);
 457                                 pts->set_platform_info(pts, platform_info);
 458                         }
 459                 }
 460                 else if (attr->get_vendor_id(attr) == PEN_TCG)
 461                 {
 462                         switch (attr->get_type(attr))
 463                         {
 464                                 case TCG_PTS_PROTO_CAPS:
 465                                 {
 466                                         tcg_pts_attr_proto_caps_t *attr_cast;
 467                                         pts_proto_caps_flag_t flags;
 468
 469                                         attr_cast = (tcg_pts_attr_proto_caps_t*)attr;
 470                                         flags = attr_cast->get_flags(attr_cast);
 471                                         pts->set_proto_caps(pts, flags);
 472                                         break;
 473                                 }
 474                                 case TCG_PTS_MEAS_ALGO_SELECTION:
 475                                 {
 476                                         tcg_pts_attr_meas_algo_t *attr_cast;
 477                                         pts_meas_algorithms_t selected_algorithm;
 478
 479                                         attr_cast = (tcg_pts_attr_meas_algo_t*)attr;
 480                                         selected_algorithm = attr_cast->get_algorithms(attr_cast);
 481                                         pts->set_meas_algorithm(pts, selected_algorithm);
 482                                         break;
 483                                 }
 484                                 case TCG_PTS_TPM_VERSION_INFO:
 485                                 {
 486                                         tcg_pts_attr_tpm_version_info_t *attr_cast;
 487                                         chunk_t tpm_version_info;
 488
 489                                         attr_cast = (tcg_pts_attr_tpm_version_info_t*)attr;
 490                                         tpm_version_info = attr_cast->get_tpm_version_info(attr_cast);
 491                                         pts->set_tpm_version_info(pts, tpm_version_info);
 492                                         break;
 493                                 }
 494                                 case TCG_PTS_AIK:
 495                                 {
 496                                         tcg_pts_attr_aik_t *attr_cast;
 497                                         certificate_t *aik, *issuer;
 498                                         enumerator_t *e;
 499                                         bool trusted = FALSE;
 500
 501                                         attr_cast = (tcg_pts_attr_aik_t*)attr;
 502                                         aik = attr_cast->get_aik(attr_cast);
 503                                         if (!aik)
 504                                         {
 505                                                 /* TODO generate error attribute */
 506                                                 break;
 507                                         }
 508                                         if (aik->get_type(aik) == CERT_X509)
 509                                         {
 510                                                 DBG1(DBG_IMV, "verifying AIK certificate");
 511                                                 e = pts_credmgr->create_trusted_enumerator(pts_credmgr,
 512                                                                         KEY_ANY, aik->get_issuer(aik), FALSE);
 513                                                 while (e->enumerate(e, &issuer))
 514                                                 {
 515                                                         if (aik->issued_by(aik, issuer))
 516                                                         {
 517                                                                 trusted = TRUE;
 518                                                                 break;
 519                                                         }
 520                                                 }
 521                                                 e->destroy(e);
 522                                                 DBG1(DBG_IMV, "AIK certificate is %strusted",
 523                                                                            trusted ? "" : "not ");
 524                                         }
 525                                         pts->set_aik(pts, aik);
 526                                         break;
 527                                 }
 528
 529                                 /* PTS-based Attestation Evidence */
 530                                 case TCG_PTS_SIMPLE_COMP_EVID:
 531                                 {
 532                                         /** TODO: Implement saving the PCR number, Hash Algo = communicated one,
 533                                          * PCR transform (truncate SHA256, SHA384), PCR before and after values
 534                                          */
 535                                         break;
 536                                 }
 537
 538                                 case TCG_PTS_SIMPLE_EVID_FINAL:
 539                                 {
 540                                         /** TODO: Implement construct Quote structure over saved values from
 541                                          * TCG_PTS_SIMPLE_COMP_EVID and compare with received one
 542                                          */
 543                                         break;
 544                                 }
 545
 546                                 case TCG_PTS_FILE_MEAS:
 547                                 {
 548                                         tcg_pts_attr_file_meas_t *attr_cast;
 549                                         u_int16_t request_id;
 550                                         int file_count, file_id;
 551                                         pts_meas_algorithms_t algo;
 552                                         pts_file_meas_t *measurements;
 553                                         char *platform_info;
 554                                         enumerator_t *e_hash;
 555                                         bool is_dir;
 556
 557                                         platform_info = pts->get_platform_info(pts);
 558                                         if (!pts_db || !platform_info)
 559                                         {
 560                                                 break;
 561                                         }
 562
 563                                         attr_cast = (tcg_pts_attr_file_meas_t*)attr;
 564                                         measurements = attr_cast->get_measurements(attr_cast);
 565                                         algo = pts->get_meas_algorithm(pts);
 566                                         request_id = measurements->get_request_id(measurements);
 567                                         file_count = measurements->get_file_count(measurements);
 568
 569                                         DBG1(DBG_IMV, "measurement request %d returned %d file%s:",
 570                                                  request_id, file_count, (file_count == 1) ? "":"s");
 571
 572                                         if (!attestation_state->check_off_request(attestation_state,
 573                                                 request_id, &file_id, &is_dir))
 574                                         {
 575                                                 DBG1(DBG_IMV, "  no entry found for this request");
 576                                                 break;
 577                                         }
 578
 579                                         /* check hashes from database against measurements */
 580                                         e_hash = pts_db->create_hash_enumerator(pts_db,
 581                                                                         platform_info, algo, file_id, is_dir);
 582                                         if (!measurements->verify(measurements, e_hash, is_dir))
 583                                         {
 584                                                 measurement_error = TRUE;
 585                                         }
 586                                         e_hash->destroy(e_hash);
 587                                         break;
 588                                 }
 589                                 case TCG_PTS_UNIX_FILE_META:
 590                                 {
 591                                         tcg_pts_attr_file_meta_t *attr_cast;
 592                                         int file_count;
 593                                         pts_file_meta_t *metadata;
 594                                         enumerator_t *e;
 595                                         pts_file_metadata_t *entry;
 596
 597                                         attr_cast = (tcg_pts_attr_file_meta_t*)attr;
 598                                         metadata = attr_cast->get_metadata(attr_cast);
 599                                         file_count = metadata->get_file_count(metadata);
 600
 601                                         DBG1(DBG_IMV, "metadata request returned %d file%s:",
 602                                                  file_count, (file_count == 1) ? "":"s");
 603
 604                                         e = metadata->create_enumerator(metadata);
 605                                         while(e->enumerate(e, &entry))
 606                                         {
 607                                                 DBG1(DBG_IMV, "File name:          %s", entry->filename);
 608                                                 DBG1(DBG_IMV, "     type:          %d", entry->type);
 609                                                 DBG1(DBG_IMV, "     size:          %d", entry->filesize);
 610                                                 DBG1(DBG_IMV, "     create time:   %s", ctime(&entry->create_time));
 611                                                 DBG1(DBG_IMV, "     last modified: %s", ctime(&entry->last_modify_time));
 612                                                 DBG1(DBG_IMV, "     last accessed: %s", ctime(&entry->last_access_time));
 613                                                 DBG1(DBG_IMV, "     owner id:      %d", entry->owner_id);
 614                                                 DBG1(DBG_IMV, "     group id:      %d", entry->group_id);
 615                                         }
 616
 617                                         e->destroy(e);
 618
 619                                         break;
 620                                 }
 621
 622                                 /* TODO: Not implemented yet */
 623                                 case TCG_PTS_DH_NONCE_PARAMS_RESP:
 624                                 case TCG_PTS_INTEG_MEAS_LOG:
 625                                 /* Attributes using XML */
 626                                 case TCG_PTS_TEMPL_REF_MANI_SET_META:
 627                                 case TCG_PTS_VERIFICATION_RESULT:
 628                                 case TCG_PTS_INTEG_REPORT:
 629                                 /* On Windows only*/
 630                                 case TCG_PTS_WIN_FILE_META:
 631                                 case TCG_PTS_REGISTRY_VALUE:
 632                                 /* Received on IMC side only*/
 633                                 case TCG_PTS_REQ_PROTO_CAPS:
 634                                 case TCG_PTS_DH_NONCE_PARAMS_REQ:
 635                                 case TCG_PTS_DH_NONCE_FINISH:
 636                                 case TCG_PTS_MEAS_ALGO:
 637                                 case TCG_PTS_GET_TPM_VERSION_INFO:
 638                                 case TCG_PTS_REQ_TEMPL_REF_MANI_SET_META:
 639                                 case TCG_PTS_UPDATE_TEMPL_REF_MANI:
 640                                 case TCG_PTS_GET_AIK:
 641                                 case TCG_PTS_REQ_FUNCT_COMP_EVID:
 642                                 case TCG_PTS_GEN_ATTEST_EVID:
 643                                 case TCG_PTS_REQ_FILE_META:
 644                                 case TCG_PTS_REQ_FILE_MEAS:
 645                                 case TCG_PTS_REQ_INTEG_MEAS_LOG:
 646                                 default:
 647                                         DBG1(DBG_IMV, "received unsupported attribute '%N'",
 648                                                 tcg_attr_names, attr->get_type(attr));
 649                                         break;
 650                         }
 651                 }
 652         }
 653         enumerator->destroy(enumerator);
 654         pa_tnc_msg->destroy(pa_tnc_msg);
 655
 656
 657         if (fatal_error)
 658         {
 659                 state->set_recommendation(state,
 660                                                                 TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION,
 661                                                                 TNC_IMV_EVALUATION_RESULT_ERROR);
 662                 return imv_attestation->provide_recommendation(imv_attestation,
 663                                                                                                            connection_id);
 664         }
 665
 666         if (attestation_state->get_handshake_state(attestation_state) &
 667                 IMV_ATTESTATION_STATE_END)
 668         {
 669                 if (attestation_state->get_request_count(attestation_state))
 670                 {
 671                         DBG1(DBG_IMV, "failure due to %d pending file measurements",
 672                                  attestation_state->get_request_count(attestation_state));
 673                         measurement_error = TRUE;
 674                 }
 675                 if (measurement_error)
 676                 {
 677                         state->set_recommendation(state,
 678                                                                 TNC_IMV_ACTION_RECOMMENDATION_ISOLATE,
 679                                                                 TNC_IMV_EVALUATION_RESULT_NONCOMPLIANT_MAJOR);
 680                 }
 681                 else
 682                 {
 683                         state->set_recommendation(state,
 684                                                                 TNC_IMV_ACTION_RECOMMENDATION_ALLOW,
 685                                                                 TNC_IMV_EVALUATION_RESULT_COMPLIANT);
 686                 }
 687                 return imv_attestation->provide_recommendation(imv_attestation,
 688                                                                                                            connection_id);
 689         }
 690
 691         return send_message(connection_id);
 692 }
 693
 694 /**
 695  * see section 3.7.4 of TCG TNC IF-IMV Specification 1.2
 696  */
 697 TNC_Result TNC_IMV_SolicitRecommendation(TNC_IMVID imv_id,
 698                                                                                  TNC_ConnectionID connection_id)
 699 {
 700         if (!imv_attestation)
 701         {
 702                 DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
 703                 return TNC_RESULT_NOT_INITIALIZED;
 704         }
 705         return imv_attestation->provide_recommendation(imv_attestation, connection_id);
 706 }
 707
 708 /**
 709  * see section 3.7.5 of TCG TNC IF-IMV Specification 1.2
 710  */
 711 TNC_Result TNC_IMV_BatchEnding(TNC_IMVID imv_id,
 712                                                            TNC_ConnectionID connection_id)
 713 {
 714         imv_state_t *state;
 715         imv_attestation_state_t *attestation_state;
 716
 717         if (!imv_attestation)
 718         {
 719                 DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
 720                 return TNC_RESULT_NOT_INITIALIZED;
 721         }
 722         /* get current IMV state */
 723         if (!imv_attestation->get_state(imv_attestation, connection_id, &state))
 724         {
 725                 return TNC_RESULT_FATAL;
 726         }
 727         attestation_state = (imv_attestation_state_t*)state;
 728
 729         /* Check if IMV has to initiate the PA-TNC exchange */
 730         if (attestation_state->get_handshake_state(attestation_state) ==
 731                 IMV_ATTESTATION_STATE_INIT)
 732         {
 733                 return send_message(connection_id);
 734         }
 735         return TNC_RESULT_SUCCESS;
 736 }
 737
 738 /**
 739  * see section 3.7.6 of TCG TNC IF-IMV Specification 1.2
 740  */
 741 TNC_Result TNC_IMV_Terminate(TNC_IMVID imv_id)
 742 {
 743         if (!imv_attestation)
 744         {
 745                 DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
 746                 return TNC_RESULT_NOT_INITIALIZED;
 747         }
 748         if (pts_creds)
 749         {
 750                 pts_credmgr->remove_set(pts_credmgr, pts_creds->get_set(pts_creds));
 751                 pts_creds->destroy(pts_creds);
 752         }
 753         DESTROY_IF(pts_db);
 754         DESTROY_IF(pts_credmgr);
 755
 756         libpts_deinit();
 757
 758         imv_attestation->destroy(imv_attestation);
 759         imv_attestation = NULL;
 760
 761         return TNC_RESULT_SUCCESS;
 762 }
 763
 764 /**
 765  * see section 4.2.8.1 of TCG TNC IF-IMV Specification 1.2
 766  */
 767 TNC_Result TNC_IMV_ProvideBindFunction(TNC_IMVID imv_id,
 768                                                                            TNC_TNCS_BindFunctionPointer bind_function)
 769 {
 770         if (!imv_attestation)
 771         {
 772                 DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
 773                 return TNC_RESULT_NOT_INITIALIZED;
 774         }
 775         return imv_attestation->bind_functions(imv_attestation, bind_function);
 776 }