/* * Copyright (C) 2011-2012 Sansar Choinyambuu * Copyright (C) 2011-2015 Andreas Steffen * HSR Hochschule fuer Technik Rapperswil * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. See . * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. */ #define _GNU_SOURCE /* for stdndup() */ #include #include "imv_attestation_agent.h" #include "imv_attestation_state.h" #include "imv_attestation_process.h" #include "imv_attestation_build.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "tcg/seg/tcg_seg_attr_max_size.h" #include "tcg/seg/tcg_seg_attr_seg_env.h" #include #include #include #include #include #include #include #include #include #define FILE_MEAS_MAX_ATTR_SIZE 100000000 typedef struct private_imv_attestation_agent_t private_imv_attestation_agent_t; /* Subscribed PA-TNC message subtypes */ static pen_type_t msg_types[] = { { PEN_TCG, PA_SUBTYPE_TCG_PTS }, { PEN_IETF, PA_SUBTYPE_IETF_OPERATING_SYSTEM } }; /** * Private data of an imv_attestation_agent_t object. */ struct private_imv_attestation_agent_t { /** * Public members of imv_attestation_agent_t */ imv_agent_if_t public; /** * IMV agent responsible for generic functions */ imv_agent_t *agent; /** * Supported PTS measurement algorithms */ pts_meas_algorithms_t supported_algorithms; /** * Supported PTS Diffie Hellman Groups */ pts_dh_group_t supported_dh_groups; /** * PTS file measurement database */ pts_database_t *pts_db; /** * PTS credentials */ pts_creds_t *pts_creds; /** * PTS credential manager */ credential_manager_t *pts_credmgr; }; METHOD(imv_agent_if_t, bind_functions, TNC_Result, private_imv_attestation_agent_t *this, TNC_TNCS_BindFunctionPointer bind_function) { return this->agent->bind_functions(this->agent, bind_function); } METHOD(imv_agent_if_t, notify_connection_change, TNC_Result, private_imv_attestation_agent_t *this, TNC_ConnectionID id, TNC_ConnectionState new_state) { TNC_IMV_Action_Recommendation rec; imv_state_t *state; imv_session_t *session; switch (new_state) { case TNC_CONNECTION_STATE_CREATE: state = imv_attestation_state_create(id); return this->agent->create_state(this->agent, state); case TNC_CONNECTION_STATE_DELETE: return this->agent->delete_state(this->agent, id); case TNC_CONNECTION_STATE_ACCESS_ALLOWED: case TNC_CONNECTION_STATE_ACCESS_ISOLATED: case TNC_CONNECTION_STATE_ACCESS_NONE: if (this->agent->get_state(this->agent, id, &state) && imcv_db) { session = state->get_session(state); if (session->get_policy_started(session)) { switch (new_state) { case TNC_CONNECTION_STATE_ACCESS_ALLOWED: rec = TNC_IMV_ACTION_RECOMMENDATION_ALLOW; break; case TNC_CONNECTION_STATE_ACCESS_ISOLATED: rec = TNC_IMV_ACTION_RECOMMENDATION_ISOLATE; break; case TNC_CONNECTION_STATE_ACCESS_NONE: default: rec = TNC_IMV_ACTION_RECOMMENDATION_NO_ACCESS; } imcv_db->add_recommendation(imcv_db, session, rec); if (!imcv_db->policy_script(imcv_db, session, FALSE)) { DBG1(DBG_IMV, "error in policy script stop"); } } } /* fall through to default state */ default: return this->agent->change_state(this->agent, id, new_state, NULL); } } /** * Process a received message */ static TNC_Result receive_msg(private_imv_attestation_agent_t *this, imv_state_t *state, imv_msg_t *in_msg) { imv_msg_t *out_msg; imv_session_t *session; imv_os_info_t *os_info; enumerator_t *enumerator; pa_tnc_attr_t *attr; pen_type_t type; TNC_Result result; chunk_t os_name, os_version; bool fatal_error = FALSE; /* generate an outgoing PA-TNC message - we might need it */ out_msg = imv_msg_create_as_reply(in_msg); out_msg->set_msg_type(out_msg, msg_types[0]); /* parse received PA-TNC message and handle local and remote errors */ result = in_msg->receive(in_msg, out_msg, &fatal_error); if (result != TNC_RESULT_SUCCESS) { out_msg->destroy(out_msg); return result; } session = state->get_session(state); os_info = session->get_os_info(session); /* analyze PA-TNC attributes */ enumerator = in_msg->create_attribute_enumerator(in_msg); while (enumerator->enumerate(enumerator, &attr)) { type = attr->get_type(attr); if (type.vendor_id == PEN_IETF) { switch (type.type) { case IETF_ATTR_PA_TNC_ERROR: { ietf_attr_pa_tnc_error_t *error_attr; pen_type_t error_code; chunk_t msg_info; error_attr = (ietf_attr_pa_tnc_error_t*)attr; error_code = error_attr->get_error_code(error_attr); if (error_code.vendor_id == PEN_TCG) { msg_info = error_attr->get_msg_info(error_attr); DBG1(DBG_IMV, "received TCG-PTS error '%N'", pts_error_code_names, error_code.type); DBG1(DBG_IMV, "error information: %B", &msg_info); fatal_error = TRUE; } break; } case IETF_ATTR_PRODUCT_INFORMATION: { ietf_attr_product_info_t *attr_cast; pen_t vendor_id; state->set_action_flags(state, IMV_ATTESTATION_ATTR_PRODUCT_INFO); attr_cast = (ietf_attr_product_info_t*)attr; os_name = attr_cast->get_info(attr_cast, &vendor_id, NULL); os_info->set_name(os_info, os_name); if (vendor_id != PEN_IETF) { DBG1(DBG_IMV, "operating system name is '%.*s' " "from vendor %N", os_name.len, os_name.ptr, pen_names, vendor_id); } else { DBG1(DBG_IMV, "operating system name is '%.*s'", os_name.len, os_name.ptr); } break; break; } case IETF_ATTR_STRING_VERSION: { ietf_attr_string_version_t *attr_cast; state->set_action_flags(state, IMV_ATTESTATION_ATTR_STRING_VERSION); attr_cast = (ietf_attr_string_version_t*)attr; os_version = attr_cast->get_version(attr_cast, NULL, NULL); os_info->set_version(os_info, os_version); if (os_version.len) { DBG1(DBG_IMV, "operating system version is '%.*s'", os_version.len, os_version.ptr); } break; } default: break; } } else if (type.vendor_id == PEN_ITA) { switch (type.type) { case ITA_ATTR_DEVICE_ID: { chunk_t value; state->set_action_flags(state, IMV_ATTESTATION_ATTR_DEVICE_ID); value = attr->get_value(attr); DBG1(DBG_IMV, "device ID is %.*s", value.len, value.ptr); session->set_device_id(session, value); break; } default: break; } } else if (type.vendor_id == PEN_TCG) { if (!imv_attestation_process(attr, out_msg, state, this->supported_algorithms, this->supported_dh_groups, this->pts_db, this->pts_credmgr)) { result = TNC_RESULT_FATAL; break; } } } enumerator->destroy(enumerator); if (fatal_error || result != TNC_RESULT_SUCCESS) { state->set_recommendation(state, TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION, TNC_IMV_EVALUATION_RESULT_ERROR); result = out_msg->send_assessment(out_msg); if (result == TNC_RESULT_SUCCESS) { result = this->agent->provide_recommendation(this->agent, state); } } else { /* send PA-TNC message with the EXCL flag set */ result = out_msg->send(out_msg, TRUE); } out_msg->destroy(out_msg); return result; } METHOD(imv_agent_if_t, receive_message, TNC_Result, private_imv_attestation_agent_t *this, TNC_ConnectionID id, TNC_MessageType msg_type, chunk_t msg) { imv_state_t *state; imv_msg_t *in_msg; TNC_Result result; if (!this->agent->get_state(this->agent, id, &state)) { return TNC_RESULT_FATAL; } in_msg = imv_msg_create_from_data(this->agent, state, id, msg_type, msg); result = receive_msg(this, state, in_msg); in_msg->destroy(in_msg); return result; } METHOD(imv_agent_if_t, receive_message_long, TNC_Result, private_imv_attestation_agent_t *this, TNC_ConnectionID id, TNC_UInt32 src_imc_id, TNC_UInt32 dst_imv_id, TNC_VendorID msg_vid, TNC_MessageSubtype msg_subtype, chunk_t msg) { imv_state_t *state; imv_msg_t *in_msg; TNC_Result result; if (!this->agent->get_state(this->agent, id, &state)) { return TNC_RESULT_FATAL; } in_msg = imv_msg_create_from_long_data(this->agent, state, id, src_imc_id, dst_imv_id, msg_vid, msg_subtype, msg); result = receive_msg(this, state, in_msg); in_msg->destroy(in_msg); return result; } /** * Build an IETF Attribute Request attribute for missing attributes */ static pa_tnc_attr_t* build_attr_request(uint32_t received) { pa_tnc_attr_t *attr; ietf_attr_attr_request_t *attr_cast; attr = ietf_attr_attr_request_create(PEN_RESERVED, 0); attr_cast = (ietf_attr_attr_request_t*)attr; if (!(received & IMV_ATTESTATION_ATTR_PRODUCT_INFO) || !(received & IMV_ATTESTATION_ATTR_STRING_VERSION)) { attr_cast->add(attr_cast, PEN_IETF, IETF_ATTR_PRODUCT_INFORMATION); attr_cast->add(attr_cast, PEN_IETF, IETF_ATTR_STRING_VERSION); } if (!(received & IMV_ATTESTATION_ATTR_DEVICE_ID)) { attr_cast->add(attr_cast, PEN_ITA, ITA_ATTR_DEVICE_ID); } return attr; } METHOD(imv_agent_if_t, batch_ending, TNC_Result, private_imv_attestation_agent_t *this, TNC_ConnectionID id) { imv_msg_t *out_msg; imv_state_t *state; imv_session_t *session; imv_attestation_state_t *attestation_state; imv_attestation_handshake_state_t handshake_state; imv_workitem_t *workitem; TNC_IMV_Action_Recommendation rec; TNC_IMV_Evaluation_Result eval; TNC_IMVID imv_id; TNC_Result result = TNC_RESULT_SUCCESS; pts_t *pts; int pid; uint32_t actions; enumerator_t *enumerator; if (!this->agent->get_state(this->agent, id, &state)) { return TNC_RESULT_FATAL; } attestation_state = (imv_attestation_state_t*)state; pts = attestation_state->get_pts(attestation_state); handshake_state = attestation_state->get_handshake_state(attestation_state); actions = state->get_action_flags(state); session = state->get_session(state); imv_id = this->agent->get_id(this->agent); /* exit if a recommendation has already been provided */ if (actions & IMV_ATTESTATION_REC) { return TNC_RESULT_SUCCESS; } /* send an IETF attribute request if no platform info was received */ if (!(actions & IMV_ATTESTATION_ATTR_REQ)) { if ((actions & IMV_ATTESTATION_ATTR_MUST) != IMV_ATTESTATION_ATTR_MUST) { imv_msg_t *os_msg; /* create attribute request for missing mandatory attributes */ os_msg = imv_msg_create(this->agent, state, id, imv_id, TNC_IMCID_ANY, msg_types[1]); os_msg->add_attribute(os_msg, build_attr_request(actions)); result = os_msg->send(os_msg, FALSE); os_msg->destroy(os_msg); if (result != TNC_RESULT_SUCCESS) { return result; } } state->set_action_flags(state, IMV_ATTESTATION_ATTR_REQ); } if (!session->get_policy_started(session) && (actions & IMV_ATTESTATION_ATTR_PRODUCT_INFO) && (actions & IMV_ATTESTATION_ATTR_STRING_VERSION) && (actions & IMV_ATTESTATION_ATTR_DEVICE_ID)) { if (imcv_db) { /* start the policy script */ if (!imcv_db->policy_script(imcv_db, session, TRUE)) { DBG1(DBG_IMV, "error in policy script start"); } } else { DBG2(DBG_IMV, "no workitems available - no evaluation possible"); state->set_recommendation(state, TNC_IMV_ACTION_RECOMMENDATION_ALLOW, TNC_IMV_EVALUATION_RESULT_DONT_KNOW); session->set_policy_started(session, TRUE); } } if (handshake_state == IMV_ATTESTATION_STATE_INIT) { size_t max_attr_size = FILE_MEAS_MAX_ATTR_SIZE; size_t max_seg_size; seg_contract_t *contract; seg_contract_manager_t *contracts; pa_tnc_attr_t *attr; pts_proto_caps_flag_t flags; char buf[BUF_LEN]; out_msg = imv_msg_create(this->agent, state, id, imv_id, TNC_IMCID_ANY, msg_types[0]); /* Determine maximum PA-TNC attribute segment size */ max_seg_size = state->get_max_msg_len(state) - PA_TNC_HEADER_SIZE - PA_TNC_ATTR_HEADER_SIZE - TCG_SEG_ATTR_SEG_ENV_HEADER; /* Announce support of PA-TNC segmentation to IMC */ contract = seg_contract_create(msg_types[0], max_attr_size, max_seg_size, TRUE, imv_id, FALSE); contract->get_info_string(contract, buf, BUF_LEN, TRUE); DBG2(DBG_IMV, "%s", buf); contracts = state->get_contracts(state); contracts->add_contract(contracts, contract); attr = tcg_seg_attr_max_size_create(max_attr_size, max_seg_size, TRUE); out_msg->add_attribute(out_msg, attr); /* Send Request Protocol Capabilities attribute */ flags = pts->get_proto_caps(pts); attr = tcg_pts_attr_proto_caps_create(flags, TRUE); attr->set_noskip_flag(attr, TRUE); out_msg->add_attribute(out_msg, attr); /* Send Measurement Algorithms attribute */ attr = tcg_pts_attr_meas_algo_create(this->supported_algorithms, FALSE); attr->set_noskip_flag(attr, TRUE); out_msg->add_attribute(out_msg, attr); attestation_state->set_handshake_state(attestation_state, IMV_ATTESTATION_STATE_DISCOVERY); /* send these initial PTS attributes and exit */ result = out_msg->send(out_msg, FALSE); out_msg->destroy(out_msg); return result; } /* exit if we are not ready yet for PTS measurements */ if (!(actions & IMV_ATTESTATION_ALGO)) { return TNC_RESULT_SUCCESS; } session->get_session_id(session, &pid, NULL); pts->set_platform_id(pts, pid); /* create an empty out message - we might need it */ out_msg = imv_msg_create(this->agent, state, id, imv_id, TNC_IMCID_ANY, msg_types[0]); /* establish the PTS measurements to be taken */ if (!(actions & IMV_ATTESTATION_FILE_MEAS)) { bool is_dir, no_workitems = TRUE; uint32_t delimiter = SOLIDUS_UTF; uint16_t request_id; pa_tnc_attr_t *attr; char *pathname; attestation_state->set_handshake_state(attestation_state, IMV_ATTESTATION_STATE_END); enumerator = session->create_workitem_enumerator(session); if (enumerator) { while (enumerator->enumerate(enumerator, &workitem)) { if (workitem->get_imv_id(workitem) != TNC_IMVID_ANY) { continue; } switch (workitem->get_type(workitem)) { case IMV_WORKITEM_FILE_REF_MEAS: case IMV_WORKITEM_FILE_MEAS: case IMV_WORKITEM_FILE_META: is_dir = FALSE; break; case IMV_WORKITEM_DIR_REF_MEAS: case IMV_WORKITEM_DIR_MEAS: case IMV_WORKITEM_DIR_META: is_dir = TRUE; break; case IMV_WORKITEM_TPM_ATTEST: { pts_component_t *comp; pts_comp_func_name_t *comp_name; bool no_d_flag, no_t_flag; char result_str[BUF_LEN]; workitem->set_imv_id(workitem, imv_id); no_workitems = FALSE; no_d_flag = !(pts->get_proto_caps(pts) & PTS_PROTO_CAPS_D); no_t_flag = !(pts->get_proto_caps(pts) & PTS_PROTO_CAPS_T); if (no_d_flag || no_t_flag) { snprintf(result_str, BUF_LEN, "%s%s%s", (no_t_flag) ? "no TPM available" : "", (no_t_flag && no_d_flag) ? ", " : "", (no_d_flag) ? "no DH nonce negotiation" : ""); eval = TNC_IMV_EVALUATION_RESULT_ERROR; session->remove_workitem(session, enumerator); rec = workitem->set_result(workitem, result_str, eval); state->update_recommendation(state, rec, eval); imcv_db->finalize_workitem(imcv_db, workitem); workitem->destroy(workitem); continue; } /* do TPM BIOS measurements */ if (strchr(workitem->get_arg_str(workitem), 'B')) { comp_name = pts_comp_func_name_create(PEN_ITA, PTS_ITA_COMP_FUNC_NAME_IMA, PTS_ITA_QUALIFIER_FLAG_KERNEL | PTS_ITA_QUALIFIER_TYPE_TRUSTED); comp = attestation_state->create_component( attestation_state, comp_name, 0, this->pts_db); if (!comp) { comp_name->log(comp_name, "unregistered "); } comp_name->destroy(comp_name); } /* do TPM IMA measurements */ if (strchr(workitem->get_arg_str(workitem), 'I')) { comp_name = pts_comp_func_name_create(PEN_ITA, PTS_ITA_COMP_FUNC_NAME_IMA, PTS_ITA_QUALIFIER_FLAG_KERNEL | PTS_ITA_QUALIFIER_TYPE_OS); comp = attestation_state->create_component( attestation_state, comp_name, 0, this->pts_db); if (!comp) { comp_name->log(comp_name, "unregistered "); } comp_name->destroy(comp_name); } /* do TPM TRUSTED BOOT measurements */ if (strchr(workitem->get_arg_str(workitem), 'T')) { comp_name = pts_comp_func_name_create(PEN_ITA, PTS_ITA_COMP_FUNC_NAME_TBOOT, PTS_ITA_QUALIFIER_FLAG_KERNEL | PTS_ITA_QUALIFIER_TYPE_TRUSTED); comp = attestation_state->create_component( attestation_state, comp_name, 0, this->pts_db); if (!comp) { comp_name->log(comp_name, "unregistered "); } comp_name->destroy(comp_name); } attestation_state->set_handshake_state(attestation_state, IMV_ATTESTATION_STATE_NONCE_REQ); continue; } default: continue; } /* initiate file and directory measurements */ pathname = this->pts_db->get_pathname(this->pts_db, is_dir, workitem->get_arg_int(workitem)); if (!pathname) { continue; } workitem->set_imv_id(workitem, imv_id); no_workitems = FALSE; if (workitem->get_type(workitem) == IMV_WORKITEM_FILE_META) { TNC_IMV_Action_Recommendation rec; TNC_IMV_Evaluation_Result eval; char result_str[BUF_LEN]; DBG2(DBG_IMV, "IMV %d requests metadata for %s '%s'", imv_id, is_dir ? "directory" : "file", pathname); /* currently just fire and forget metadata requests */ attr = tcg_pts_attr_req_file_meta_create(is_dir, delimiter, pathname); snprintf(result_str, BUF_LEN, "%s metadata requested", is_dir ? "directory" : "file"); eval = TNC_IMV_EVALUATION_RESULT_COMPLIANT; session->remove_workitem(session, enumerator); rec = workitem->set_result(workitem, result_str, eval); state->update_recommendation(state, rec, eval); imcv_db->finalize_workitem(imcv_db, workitem); workitem->destroy(workitem); } else { /* use lower 16 bits of the workitem ID as request ID */ request_id = workitem->get_id(workitem) & 0xffff; DBG2(DBG_IMV, "IMV %d requests measurement %d for %s '%s'", imv_id, request_id, is_dir ? "directory" : "file", pathname); attr = tcg_pts_attr_req_file_meas_create(is_dir, request_id, delimiter, pathname); } free(pathname); attr->set_noskip_flag(attr, TRUE); out_msg->add_attribute(out_msg, attr); } enumerator->destroy(enumerator); /* sent all file and directory measurement and metadata requests */ state->set_action_flags(state, IMV_ATTESTATION_FILE_MEAS); if (no_workitems) { DBG2(DBG_IMV, "IMV %d has no workitems - " "no evaluation requested", imv_id); state->set_recommendation(state, TNC_IMV_ACTION_RECOMMENDATION_ALLOW, TNC_IMV_EVALUATION_RESULT_DONT_KNOW); } } } /* check the IMV state for the next PA-TNC attributes to send */ enumerator = session->create_workitem_enumerator(session); while (enumerator->enumerate(enumerator, &workitem)) { if (workitem->get_type(workitem) == IMV_WORKITEM_TPM_ATTEST) { if (!imv_attestation_build(out_msg, state, this->supported_dh_groups, this->pts_db)) { imv_reason_string_t *reason_string; chunk_t result; char *result_str; reason_string = imv_reason_string_create("en", ", "); attestation_state->add_comp_evid_reasons(attestation_state, reason_string); result = reason_string->get_encoding(reason_string); result_str = strndup(result.ptr, result.len); reason_string->destroy(reason_string); eval = TNC_IMV_EVALUATION_RESULT_ERROR; session->remove_workitem(session, enumerator); rec = workitem->set_result(workitem, result_str, eval); state->update_recommendation(state, rec, eval); imcv_db->finalize_workitem(imcv_db, workitem); } break; } } enumerator->destroy(enumerator); /* finalized all workitems? */ if (session->get_policy_started(session) && session->get_workitem_count(session, imv_id) == 0 && attestation_state->get_handshake_state(attestation_state) == IMV_ATTESTATION_STATE_END) { result = out_msg->send_assessment(out_msg); out_msg->destroy(out_msg); state->set_action_flags(state, IMV_ATTESTATION_REC); if (result != TNC_RESULT_SUCCESS) { return result; } return this->agent->provide_recommendation(this->agent, state); } /* send non-empty PA-TNC message with excl flag not set */ if (out_msg->get_attribute_count(out_msg)) { result = out_msg->send(out_msg, FALSE); } out_msg->destroy(out_msg); return result; } METHOD(imv_agent_if_t, solicit_recommendation, TNC_Result, private_imv_attestation_agent_t *this, TNC_ConnectionID id) { TNC_IMVID imv_id; imv_state_t *state; imv_attestation_state_t *attestation_state; imv_session_t *session; if (!this->agent->get_state(this->agent, id, &state)) { return TNC_RESULT_FATAL; } attestation_state = (imv_attestation_state_t*)state; session = state->get_session(state); imv_id = this->agent->get_id(this->agent); if (imcv_db) { TNC_IMV_Evaluation_Result eval; TNC_IMV_Action_Recommendation rec; imv_workitem_t *workitem; enumerator_t *enumerator; int pending_file_meas = 0; char *result_str; chunk_t result_buf; bio_writer_t *result; enumerator = session->create_workitem_enumerator(session); if (enumerator) { while (enumerator->enumerate(enumerator, &workitem)) { if (workitem->get_imv_id(workitem) != imv_id) { continue; } result = bio_writer_create(128); switch (workitem->get_type(workitem)) { case IMV_WORKITEM_FILE_REF_MEAS: case IMV_WORKITEM_FILE_MEAS: case IMV_WORKITEM_DIR_REF_MEAS: case IMV_WORKITEM_DIR_MEAS: result_str = "pending file measurements"; pending_file_meas++; break; case IMV_WORKITEM_TPM_ATTEST: attestation_state->finalize_components(attestation_state, result); result->write_data(result, chunk_from_str("; pending component evidence")); result->write_uint8(result, '\0'); result_buf = result->get_buf(result); result_str = result_buf.ptr; break; default: result->destroy(result); continue; } session->remove_workitem(session, enumerator); eval = TNC_IMV_EVALUATION_RESULT_ERROR; rec = workitem->set_result(workitem, result_str, eval); state->update_recommendation(state, rec, eval); imcv_db->finalize_workitem(imcv_db, workitem); workitem->destroy(workitem); result->destroy(result); } enumerator->destroy(enumerator); if (pending_file_meas) { DBG1(DBG_IMV, "failure due to %d pending file measurements", pending_file_meas); attestation_state->set_measurement_error(attestation_state, IMV_ATTESTATION_ERROR_FILE_MEAS_PEND); } } } return this->agent->provide_recommendation(this->agent, state); } METHOD(imv_agent_if_t, destroy, void, private_imv_attestation_agent_t *this) { if (this->pts_creds) { this->pts_credmgr->remove_set(this->pts_credmgr, this->pts_creds->get_set(this->pts_creds)); this->pts_creds->destroy(this->pts_creds); } DESTROY_IF(this->pts_db); DESTROY_IF(this->pts_credmgr); DESTROY_IF(this->agent); free(this); } /** * Described in header. */ imv_agent_if_t *imv_attestation_agent_create(const char *name, TNC_IMVID id, TNC_Version *actual_version) { private_imv_attestation_agent_t *this; imv_agent_t *agent; char *hash_alg, *dh_group, *cadir; bool mandatory_dh_groups; agent = imv_agent_create(name, msg_types, countof(msg_types), id, actual_version); if (!agent) { return NULL; } hash_alg = lib->settings->get_str(lib->settings, "%s.plugins.imv-attestation.hash_algorithm", "sha256", lib->ns); dh_group = lib->settings->get_str(lib->settings, "%s.plugins.imv-attestation.dh_group", "ecp256", lib->ns); mandatory_dh_groups = lib->settings->get_bool(lib->settings, "%s.plugins.imv-attestation.mandatory_dh_groups", TRUE, lib->ns); cadir = lib->settings->get_str(lib->settings, "%s.plugins.imv-attestation.cadir", NULL, lib->ns); INIT(this, .public = { .bind_functions = _bind_functions, .notify_connection_change = _notify_connection_change, .receive_message = _receive_message, .receive_message_long = _receive_message_long, .batch_ending = _batch_ending, .solicit_recommendation = _solicit_recommendation, .destroy = _destroy, }, .agent = agent, .supported_algorithms = PTS_MEAS_ALGO_NONE, .supported_dh_groups = PTS_DH_GROUP_NONE, .pts_credmgr = credential_manager_create(), .pts_creds = pts_creds_create(cadir), .pts_db = pts_database_create(imcv_db), ); if (!pts_meas_algo_probe(&this->supported_algorithms) || !pts_dh_group_probe(&this->supported_dh_groups, mandatory_dh_groups) || !pts_meas_algo_update(hash_alg, &this->supported_algorithms) || !pts_dh_group_update(dh_group, &this->supported_dh_groups)) { destroy(this); return NULL; } if (this->pts_creds) { this->pts_credmgr->add_set(this->pts_credmgr, this->pts_creds->get_set(this->pts_creds)); } return &this->public; }