diff options
Diffstat (limited to 'src/libimcv/plugins/imv_swima')
| -rw-r--r-- | src/libimcv/plugins/imv_swima/Makefile.am | 21 | ||||
| -rw-r--r-- | src/libimcv/plugins/imv_swima/Makefile.in | 795 | ||||
| -rw-r--r-- | src/libimcv/plugins/imv_swima/imv_swima.c | 24 | ||||
| -rw-r--r-- | src/libimcv/plugins/imv_swima/imv_swima_agent.c | 804 | ||||
| -rw-r--r-- | src/libimcv/plugins/imv_swima/imv_swima_agent.h | 36 | ||||
| -rw-r--r-- | src/libimcv/plugins/imv_swima/imv_swima_state.c | 483 | ||||
| -rw-r--r-- | src/libimcv/plugins/imv_swima/imv_swima_state.h | 153 |
7 files changed, 2316 insertions, 0 deletions
diff --git a/src/libimcv/plugins/imv_swima/Makefile.am b/src/libimcv/plugins/imv_swima/Makefile.am new file mode 100644 index 000000000..b1726f061 --- /dev/null +++ b/src/libimcv/plugins/imv_swima/Makefile.am @@ -0,0 +1,21 @@ +AM_CPPFLAGS = \ + -I$(top_srcdir)/src/libstrongswan \ + -I$(top_srcdir)/src/libtncif \ + -I$(top_srcdir)/src/libtpmtss \ + -I$(top_srcdir)/src/libimcv + +AM_CFLAGS = \ + $(PLUGIN_CFLAGS) $(json_CFLAGS) + +imcv_LTLIBRARIES = imv-swima.la + +imv_swima_la_LIBADD = \ + $(top_builddir)/src/libimcv/libimcv.la \ + $(top_builddir)/src/libstrongswan/libstrongswan.la \ + $(json_LIBS) + +imv_swima_la_SOURCES = \ + imv_swima.c imv_swima_state.h imv_swima_state.c \ + imv_swima_agent.h imv_swima_agent.c + +imv_swima_la_LDFLAGS = -module -avoid-version -no-undefined diff --git a/src/libimcv/plugins/imv_swima/Makefile.in b/src/libimcv/plugins/imv_swima/Makefile.in new file mode 100644 index 000000000..56eafa5ad --- /dev/null +++ b/src/libimcv/plugins/imv_swima/Makefile.in @@ -0,0 +1,795 @@ +# Makefile.in generated by automake 1.15 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2014 Free Software Foundation, Inc. + +# This Makefile.in is free software; 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Makefile + + +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/src/libimcv/plugins/imv_swima/imv_swima.c b/src/libimcv/plugins/imv_swima/imv_swima.c new file mode 100644 index 000000000..0d78ea034 --- /dev/null +++ b/src/libimcv/plugins/imv_swima/imv_swima.c @@ -0,0 +1,24 @@ +/* + * Copyright (C) 2017 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 <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +#include "imv_swima_agent.h" + +static const char imv_name[] = "SWIMA"; +static const imv_agent_create_t imv_agent_create = imv_swima_agent_create; + +/* include generic TGC TNC IF-IMV API code below */ + +#include <imv/imv_if.h> + diff --git a/src/libimcv/plugins/imv_swima/imv_swima_agent.c b/src/libimcv/plugins/imv_swima/imv_swima_agent.c new file mode 100644 index 000000000..efa2b1105 --- /dev/null +++ b/src/libimcv/plugins/imv_swima/imv_swima_agent.c @@ -0,0 +1,804 @@ +/* + * Copyright (C) 2017 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 <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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 +#include <stdio.h> + +#include "imv_swima_agent.h" +#include "imv_swima_state.h" + +#include <imcv.h> +#include <imv/imv_agent.h> +#include <imv/imv_msg.h> +#include "rest/rest.h" +#include "tcg/seg/tcg_seg_attr_max_size.h" +#include "tcg/seg/tcg_seg_attr_seg_env.h" +#include "ietf/swima/ietf_swima_attr_req.h" +#include "ietf/swima/ietf_swima_attr_sw_inv.h" +#include "ietf/swima/ietf_swima_attr_sw_ev.h" +#include "swima/swima_error.h" +#include "swima/swima_inventory.h" +#include "swima/swima_events.h" +#include "swima/swima_data_model.h" + +#include <tncif_names.h> +#include <tncif_pa_subtypes.h> + +#include <pen/pen.h> +#include <utils/debug.h> +#include <bio/bio_reader.h> + +typedef struct private_imv_swima_agent_t private_imv_swima_agent_t; + +/* Subscribed PA-TNC message subtypes */ +static pen_type_t msg_types[] = { + { PEN_IETF, PA_SUBTYPE_IETF_SW } +}; + +/** + * Flag set when corresponding attribute has been received + */ +enum imv_swima_attr_t { + IMV_SWIMA_ATTR_SW_INV = (1<<0), + IMV_SWIMA_ATTR_SW_ID_INV = (1<<1), + IMV_SWIMA_ATTR_SW_EV = (1<<2), + IMV_SWIMA_ATTR_SW_ID_EV = (1<<2) +}; + +/** + * Private data of an imv_swima_agent_t object. + */ +struct private_imv_swima_agent_t { + + /** + * Public members of imv_swima_agent_t + */ + imv_agent_if_t public; + + /** + * IMV agent responsible for generic functions + */ + imv_agent_t *agent; + + /** + * REST API to strongTNC manager + */ + rest_t *rest_api; + +}; + +METHOD(imv_agent_if_t, bind_functions, TNC_Result, + private_imv_swima_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_swima_agent_t *this, TNC_ConnectionID id, + TNC_ConnectionState new_state) +{ + imv_state_t *state; + + switch (new_state) + { + case TNC_CONNECTION_STATE_CREATE: + state = imv_swima_state_create(id); + return this->agent->create_state(this->agent, state); + case TNC_CONNECTION_STATE_DELETE: + return this->agent->delete_state(this->agent, id); + default: + return this->agent->change_state(this->agent, id, new_state, NULL); + } +} + +/** + * Process a received message + */ +static TNC_Result receive_msg(private_imv_swima_agent_t *this, + imv_state_t *state, imv_msg_t *in_msg) +{ + imv_swima_state_t *swima_state; + imv_msg_t *out_msg; + enumerator_t *enumerator; + pa_tnc_attr_t *attr; + TNC_Result result; + bool fatal_error = FALSE; + + /* generate an outgoing PA-TNC message - we might need it */ + out_msg = imv_msg_create_as_reply(in_msg); + + /* 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; + } + + swima_state = (imv_swima_state_t*)state; + + /* analyze PA-TNC attributes */ + enumerator = in_msg->create_attribute_enumerator(in_msg); + while (enumerator->enumerate(enumerator, &attr)) + { + uint32_t request_id = 0, last_eid, eid_epoch; + swima_inventory_t *inventory; + swima_events_t *events; + pen_type_t type; + + type = attr->get_type(attr); + + if (type.vendor_id != PEN_IETF) + { + continue; + } + + 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, description; + bio_reader_t *reader; + uint32_t max_attr_size; + bool success; + + error_attr = (ietf_attr_pa_tnc_error_t*)attr; + error_code = error_attr->get_error_code(error_attr); + + if (error_code.vendor_id != PEN_IETF || + error_code.type <= PA_ERROR_PA_TNC_MSG_ROOF) + { + continue; + } + msg_info = error_attr->get_msg_info(error_attr); + reader = bio_reader_create(msg_info); + success = reader->read_uint32(reader, &request_id); + + DBG1(DBG_IMV, "received PA-TNC error '%N' for request %d", + pa_tnc_error_code_names, error_code.type, request_id); + if (!success) + { + reader->destroy(reader); + continue; + } + if (error_code.type == PA_ERROR_SW_RESPONSE_TOO_LARGE) + { + if (!reader->read_uint32(reader, &max_attr_size)) + { + reader->destroy(reader); + continue; + } + DBG1(DBG_IMV, " maximum PA-TNC attribute size is %u bytes", + max_attr_size); + } + description = reader->peek(reader); + if (description.len) + { + DBG1(DBG_IMV, " description: %.*s", description.len, + description.ptr); + } + reader->destroy(reader); + break; + } + case IETF_ATTR_SW_ID_INVENTORY: + { + ietf_swima_attr_sw_inv_t *attr_cast; + uint32_t missing; + int sw_id_count; + + state->set_action_flags(state, IMV_SWIMA_ATTR_SW_ID_INV); + + attr_cast = (ietf_swima_attr_sw_inv_t*)attr; + request_id = attr_cast->get_request_id(attr_cast); + inventory = attr_cast->get_inventory(attr_cast); + last_eid = inventory->get_eid(inventory, &eid_epoch); + sw_id_count = inventory->get_count(inventory); + missing = attr_cast->get_record_count(attr_cast); + swima_state->set_missing(swima_state, missing); + + DBG2(DBG_IMV, "received software ID inventory with " + "%d item%s for request %d at last eid %d of epoch 0x%08x, " + "%d item%s to follow", sw_id_count, + (sw_id_count == 1) ? "" : "s", request_id, last_eid, + eid_epoch, missing, (missing == 1) ? "" : "s"); + + if (request_id == swima_state->get_request_id(swima_state)) + { + swima_state->set_inventory(swima_state, inventory); + swima_state->set_count(swima_state, sw_id_count, 0, + in_msg->get_src_id(in_msg)); + } + else + { + DBG1(DBG_IMV, "no workitem found for software ID " + "inventory with request ID %d", request_id); + } + attr_cast->clear_inventory(attr_cast); + break; + } + case IETF_ATTR_SW_INVENTORY: + { + ietf_swima_attr_sw_inv_t *attr_cast; + swima_record_t *sw_record; + json_object *jobj, *jarray, *jstring; + pen_type_t data_model; + chunk_t tag; + char *tag_str; + uint32_t missing; + int sw_count; + enumerator_t *e; + + state->set_action_flags(state, IMV_SWIMA_ATTR_SW_INV); + + attr_cast = (ietf_swima_attr_sw_inv_t*)attr; + request_id = attr_cast->get_request_id(attr_cast); + inventory = attr_cast->get_inventory(attr_cast); + last_eid = inventory->get_eid(inventory, &eid_epoch); + sw_count = inventory->get_count(inventory); + missing = attr_cast->get_record_count(attr_cast); + swima_state->set_missing(swima_state, missing); + + DBG2(DBG_IMV, "received software inventory with %d item%s for " + "request %d at last eid %d of epoch 0x%08x, %d item%s to " + "follow", sw_count, (sw_count == 1) ? "" : "s", request_id, + last_eid, eid_epoch, missing, (missing == 1) ? "" : "s"); + + if (request_id == swima_state->get_request_id(swima_state)) + { + swima_state->set_count(swima_state, 0, sw_count, + in_msg->get_src_id(in_msg)); + + if (this->rest_api) + { + jobj = json_object_new_object(); + jarray = json_object_new_array(); + json_object_object_add(jobj, "data", jarray); + + e = inventory->create_enumerator(inventory); + while (e->enumerate(e, &sw_record)) + { + tag = sw_record->get_record(sw_record); + DBG3(DBG_IMV, "%.*s", tag.len, tag.ptr); + + data_model = sw_record->get_data_model(sw_record); + if (!pen_type_equals(data_model, + swima_data_model_iso_2015_swid_xml)) + { + DBG1(DBG_IMV, "only ISO/IEC 19770-2-2015 XML " + "data model supported"); + continue; + } + + tag_str = strndup(tag.ptr, tag.len); + jstring = json_object_new_string(tag_str); + json_object_array_add(jarray, jstring); + free(tag_str); + } + e->destroy(e); + + if (this->rest_api->post(this->rest_api, + "swid/add-tags/", jobj, NULL) != SUCCESS) + { + DBG1(DBG_IMV, "error in REST API add-tags request"); + } + json_object_put(jobj); + } + } + else + { + DBG1(DBG_IMV, "no workitem found for SWID tag inventory " + "with request ID %d", request_id); + } + attr_cast->clear_inventory(attr_cast); + break; + } + case IETF_ATTR_SW_ID_EVENTS: + { + ietf_swima_attr_sw_ev_t *attr_cast; + uint32_t missing; + int sw_ev_count; + + state->set_action_flags(state, IMV_SWIMA_ATTR_SW_ID_EV); + + attr_cast = (ietf_swima_attr_sw_ev_t*)attr; + request_id = attr_cast->get_request_id(attr_cast); + events = attr_cast->get_events(attr_cast); + last_eid = events->get_eid(events, &eid_epoch, NULL); + sw_ev_count = events->get_count(events); + missing = attr_cast->get_event_count(attr_cast); + swima_state->set_missing(swima_state, missing); + + DBG2(DBG_IMV, "received software ID events with " + "%d item%s for request %d at last eid %d of epoch 0x%08x, " + "%d item%s to follow", sw_ev_count, + (sw_ev_count == 1) ? "" : "s", request_id, last_eid, + eid_epoch, missing, (missing == 1) ? "" : "s"); + + if (request_id == swima_state->get_request_id(swima_state)) + { + swima_state->set_events(swima_state, events); + swima_state->set_count(swima_state, sw_ev_count, 0, + in_msg->get_src_id(in_msg)); + } + else + { + DBG1(DBG_IMV, "no workitem found for software ID events " + "with request ID %d", request_id); + } + attr_cast->clear_events(attr_cast); + break; + + } + default: + break; + } + } + enumerator->destroy(enumerator); + + if (fatal_error) + { + 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_swima_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_swima_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; + +} + +METHOD(imv_agent_if_t, batch_ending, TNC_Result, + private_imv_swima_agent_t *this, TNC_ConnectionID id) +{ + imv_msg_t *out_msg; + imv_state_t *state; + imv_session_t *session; + imv_workitem_t *workitem; + imv_swima_state_t *swima_state; + imv_swima_handshake_state_t handshake_state; + pa_tnc_attr_t *attr; + TNC_IMVID imv_id; + TNC_Result result = TNC_RESULT_SUCCESS; + bool no_workitems = TRUE; + uint32_t request_id, received; + uint8_t flags; + enumerator_t *enumerator; + + if (!this->agent->get_state(this->agent, id, &state)) + { + return TNC_RESULT_FATAL; + } + swima_state = (imv_swima_state_t*)state; + handshake_state = swima_state->get_handshake_state(swima_state); + session = state->get_session(state); + imv_id = this->agent->get_id(this->agent); + + if (handshake_state == IMV_SWIMA_STATE_END) + { + return TNC_RESULT_SUCCESS; + } + + /* Create an empty out message - we might need it */ + out_msg = imv_msg_create(this->agent, state, id, imv_id, + swima_state->get_imc_id(swima_state), + msg_types[0]); + + if (!imcv_db) + { + DBG2(DBG_IMV, "no workitems available - no evaluation possible"); + state->set_recommendation(state, + TNC_IMV_ACTION_RECOMMENDATION_ALLOW, + TNC_IMV_EVALUATION_RESULT_DONT_KNOW); + result = out_msg->send_assessment(out_msg); + out_msg->destroy(out_msg); + swima_state->set_handshake_state(swima_state, IMV_SWIMA_STATE_END); + + if (result != TNC_RESULT_SUCCESS) + { + return result; + } + return this->agent->provide_recommendation(this->agent, state); + } + + /* Look for SWID tag workitem and create SWID tag request */ + if (handshake_state == IMV_SWIMA_STATE_INIT && + session->get_policy_started(session)) + { + size_t max_attr_size = SWIMA_MAX_ATTR_SIZE; + size_t max_seg_size; + ietf_swima_attr_req_t *cast_attr; + seg_contract_t *contract; + seg_contract_manager_t *contracts; + swima_inventory_t *targets; + uint32_t earliest_eid = 0; + char buf[BUF_LEN]; + + enumerator = session->create_workitem_enumerator(session); + if (enumerator) + { + while (enumerator->enumerate(enumerator, &workitem)) + { + if (workitem->get_imv_id(workitem) != TNC_IMVID_ANY || + workitem->get_type(workitem) != IMV_WORKITEM_SWID_TAGS) + { + continue; + } + + flags = IETF_SWIMA_ATTR_REQ_FLAG_NONE; + if (strchr(workitem->get_arg_str(workitem), 'R')) + { + flags |= IETF_SWIMA_ATTR_REQ_FLAG_R; + } + if (strchr(workitem->get_arg_str(workitem), 'S')) + { + flags |= IETF_SWIMA_ATTR_REQ_FLAG_S; + } + if (strchr(workitem->get_arg_str(workitem), 'C')) + { + flags |= IETF_SWIMA_ATTR_REQ_FLAG_C; + } + earliest_eid = workitem->get_arg_int(workitem); + + /* 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); + + /* Issue a SWID request */ + request_id = workitem->get_id(workitem); + swima_state->set_request_id(swima_state, request_id); + attr = ietf_swima_attr_req_create(flags, request_id); + + /* Request software identifier events */ + targets = swima_inventory_create(); + targets->set_eid(targets, earliest_eid, 0); + cast_attr = (ietf_swima_attr_req_t*)attr; + cast_attr->set_targets(cast_attr, targets); + targets->destroy(targets); + + out_msg->add_attribute(out_msg, attr); + workitem->set_imv_id(workitem, imv_id); + no_workitems = FALSE; + DBG2(DBG_IMV, "IMV %d issues sw request %d with earliest eid %d", + imv_id, request_id, earliest_eid); + break; + } + enumerator->destroy(enumerator); + + 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); + } + handshake_state = IMV_SWIMA_STATE_WORKITEMS; + swima_state->set_handshake_state(swima_state, handshake_state); + } + } + + received = state->get_action_flags(state); + + if (handshake_state == IMV_SWIMA_STATE_WORKITEMS && + (received & (IMV_SWIMA_ATTR_SW_INV|IMV_SWIMA_ATTR_SW_ID_INV| + IMV_SWIMA_ATTR_SW_EV |IMV_SWIMA_ATTR_SW_ID_EV)) && + swima_state->get_missing(swima_state) == 0) + { + TNC_IMV_Evaluation_Result eval; + TNC_IMV_Action_Recommendation rec; + char result_str[BUF_LEN], *format = NULL, *cmd = NULL, *command; + char *target_str, *error_str = ""; + int sw_id_count, tag_count, i, res; + json_object *jrequest, *jresponse, *jvalue; + ietf_swima_attr_req_t *cast_attr; + swima_inventory_t *targets; + swima_record_t *target; + status_t status = SUCCESS; + + if (received & IMV_SWIMA_ATTR_SW_ID_INV) + { + cmd = "swid-measurement"; + format = "received inventory of %d SW ID%s and %d SWID tag%s"; + } + else if (received & IMV_SWIMA_ATTR_SW_ID_EV) + { + cmd = "swid-events"; + format = "received %d SW ID event%s and %d SWID tag%s"; + } + + if (cmd && this->rest_api) + { + res = asprintf(&command, "sessions/%d/%s/", + session->get_session_id(session, NULL, NULL), cmd); + if (res < 0) + { + error_str = "allocation of command string failed"; + status = FAILED; + } + else + { + jrequest = swima_state->get_jrequest(swima_state); + status = this->rest_api->post(this->rest_api, command, + jrequest, &jresponse); + if (status == FAILED) + { + error_str = "error in REST API request"; + } + free(command); + } + } + + switch (status) + { + case SUCCESS: + enumerator = session->create_workitem_enumerator(session); + while (enumerator->enumerate(enumerator, &workitem)) + { + if (workitem->get_type(workitem) == IMV_WORKITEM_SWID_TAGS) + { + swima_state->get_count(swima_state, &sw_id_count, + &tag_count); + if (format) + { + snprintf(result_str, BUF_LEN, format, + sw_id_count, (sw_id_count == 1) ? "" : "s", + tag_count, (tag_count == 1) ? "" : "s"); + } + else + { + snprintf(result_str, BUF_LEN, "received %d SWID tag" + "%s", tag_count, (tag_count == 1) ? "" : "s"); + + } + session->remove_workitem(session, enumerator); + + eval = TNC_IMV_EVALUATION_RESULT_COMPLIANT; + rec = workitem->set_result(workitem, result_str, eval); + state->update_recommendation(state, rec, eval); + imcv_db->finalize_workitem(imcv_db, workitem); + workitem->destroy(workitem); + break; + } + } + enumerator->destroy(enumerator); + break; + case NEED_MORE: + if (received & IMV_SWIMA_ATTR_SW_INV) + { + error_str = "not all requested SWID tags were received"; + status = FAILED; + json_object_put(jresponse); + break; + } + if (json_object_get_type(jresponse) != json_type_array) + { + error_str = "response was not a json_array"; + status = FAILED; + json_object_put(jresponse); + break; + } + + /* Create an IETF SW Request attribute */ + attr = ietf_swima_attr_req_create(IETF_SWIMA_ATTR_REQ_FLAG_NONE, + swima_state->get_request_id(swima_state)); + sw_id_count = json_object_array_length(jresponse); + DBG1(DBG_IMV, "%d SWID tag target%s", sw_id_count, + (sw_id_count == 1) ? "" : "s"); + swima_state->set_missing(swima_state, sw_id_count); + targets = swima_inventory_create(); + + for (i = 0; i < sw_id_count; i++) + { + jvalue = json_object_array_get_idx(jresponse, i); + if (json_object_get_type(jvalue) != json_type_string) + { + error_str = "json_string element expected in json_array"; + status = FAILED; + json_object_put(jresponse); + break; + } + target_str = (char*)json_object_get_string(jvalue); + DBG1(DBG_IMV, " %s", target_str); + target = swima_record_create(0, chunk_from_str(target_str), + chunk_empty); + targets->add(targets, target); + } + json_object_put(jresponse); + + cast_attr = (ietf_swima_attr_req_t*)attr; + cast_attr->set_targets(cast_attr, targets); + targets->destroy(targets); + out_msg->add_attribute(out_msg, attr); + break; + case FAILED: + default: + break; + } + + if (status == FAILED) + { + enumerator = session->create_workitem_enumerator(session); + while (enumerator->enumerate(enumerator, &workitem)) + { + if (workitem->get_type(workitem) == IMV_WORKITEM_SWID_TAGS) + { + session->remove_workitem(session, enumerator); + eval = TNC_IMV_EVALUATION_RESULT_ERROR; + rec = workitem->set_result(workitem, error_str, eval); + state->update_recommendation(state, rec, eval); + imcv_db->finalize_workitem(imcv_db, workitem); + workitem->destroy(workitem); + break; + } + } + enumerator->destroy(enumerator); + } + } + + /* finalized all workitems ? */ + if (handshake_state == IMV_SWIMA_STATE_WORKITEMS && + session->get_workitem_count(session, imv_id) == 0) + { + result = out_msg->send_assessment(out_msg); + out_msg->destroy(out_msg); + swima_state->set_handshake_state(swima_state, IMV_SWIMA_STATE_END); + + 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_swima_agent_t *this, TNC_ConnectionID id) +{ + imv_state_t *state; + + if (!this->agent->get_state(this->agent, id, &state)) + { + return TNC_RESULT_FATAL; + } + return this->agent->provide_recommendation(this->agent, state); +} + +METHOD(imv_agent_if_t, destroy, void, + private_imv_swima_agent_t *this) +{ + DESTROY_IF(this->rest_api); + this->agent->destroy(this->agent); + free(this); +} + +/** + * Described in header. + */ +imv_agent_if_t *imv_swima_agent_create(const char *name, TNC_IMVID id, + TNC_Version *actual_version) +{ + private_imv_swima_agent_t *this; + imv_agent_t *agent; + char *uri; + u_int timeout; + + agent = imv_agent_create(name, msg_types, countof(msg_types), id, + actual_version); + if (!agent) + { + return NULL; + } + agent->add_non_fatal_attr_type(agent, + pen_type_create(PEN_TCG, TCG_SEG_MAX_ATTR_SIZE_REQ)); + + 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, + ); + + uri = lib->settings->get_str(lib->settings, + "%s.plugins.imv-swima.rest_api.uri", NULL, lib->ns); + timeout = lib->settings->get_int(lib->settings, + "%s.plugins.imv-swima.rest_api.timeout", 120, lib->ns); + if (uri) + { + this->rest_api = rest_create(uri, timeout); + } + + return &this->public; +} + diff --git a/src/libimcv/plugins/imv_swima/imv_swima_agent.h b/src/libimcv/plugins/imv_swima/imv_swima_agent.h new file mode 100644 index 000000000..d07c774dc --- /dev/null +++ b/src/libimcv/plugins/imv_swima/imv_swima_agent.h @@ -0,0 +1,36 @@ +/* + * Copyright (C) 2017 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 <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +/** + * @defgroup imv_swima_agent_t imv_swima_agent + * @{ @ingroup imv_swima + */ + +#ifndef IMV_SWIMA_AGENT_H_ +#define IMV_SWIMA_AGENT_H_ + +#include <imv/imv_agent_if.h> + +/** + * Creates an SWID IMV agent + * + * @param name Name of the IMV + * @param id ID of the IMV + * @param actual_version TNC IF-IMV version + */ +imv_agent_if_t* imv_swima_agent_create(const char* name, TNC_IMVID id, + TNC_Version *actual_version); + +#endif /** IMV_SWIMA_AGENT_H_ @}*/ diff --git a/src/libimcv/plugins/imv_swima/imv_swima_state.c b/src/libimcv/plugins/imv_swima/imv_swima_state.c new file mode 100644 index 000000000..03500bc2d --- /dev/null +++ b/src/libimcv/plugins/imv_swima/imv_swima_state.c @@ -0,0 +1,483 @@ +/* + * Copyright (C) 2017 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 <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +#include "imv_swima_state.h" + +#include <imv/imv_lang_string.h> +#include <imv/imv_reason_string.h> +#include <imv/imv_remediation_string.h> + +#include <tncif_policy.h> + +#include <utils/debug.h> + +typedef struct private_imv_swima_state_t private_imv_swima_state_t; + +/** + * Private data of an imv_swima_state_t object. + */ +struct private_imv_swima_state_t { + + /** + * Public members of imv_swima_state_t + */ + imv_swima_state_t public; + + /** + * TNCCS connection ID + */ + TNC_ConnectionID connection_id; + + /** + * TNCCS connection state + */ + TNC_ConnectionState state; + + /** + * Does the TNCCS connection support long message types? + */ + bool has_long; + + /** + * Does the TNCCS connection support exclusive delivery? + */ + bool has_excl; + + /** + * Maximum PA-TNC message size for this TNCCS connection + */ + uint32_t max_msg_len; + + /** + * Flags set for completed actions + */ + uint32_t action_flags; + + /** + * IMV database session associated with TNCCS connection + */ + imv_session_t *session; + + /** + * PA-TNC attribute segmentation contracts associated with TNCCS connection + */ + seg_contract_manager_t *contracts; + + /** + * IMV action recommendation + */ + TNC_IMV_Action_Recommendation rec; + + /** + * IMV evaluation result + */ + TNC_IMV_Evaluation_Result eval; + + /** + * IMV Scanner handshake state + */ + imv_swima_handshake_state_t handshake_state; + + /** + * TNC Reason String + */ + imv_reason_string_t *reason_string; + + /** + * IETF Remediation Instructions String + */ + imv_remediation_string_t *remediation_string; + + /** + * SWID Tag Request ID + */ + uint32_t request_id; + + /** + * Number of processed Software Identifiers + */ + int sw_id_count; + + /** + * Number of processed SWID Tags + */ + int tag_count; + + /** + * Number of missing Software Identifiers or SWID Tags + */ + uint32_t missing; + + /** + * SWID IMC ID + */ + TNC_UInt32 imc_id; + + /** + * Top level JSON object + */ + json_object *jobj; + + /** + * JSON array containing either a SW [ID] inventory or SW ID events + */ + json_object *jarray; + +}; + +METHOD(imv_state_t, get_connection_id, TNC_ConnectionID, + private_imv_swima_state_t *this) +{ + return this->connection_id; +} + +METHOD(imv_state_t, has_long, bool, + private_imv_swima_state_t *this) +{ + return this->has_long; +} + +METHOD(imv_state_t, has_excl, bool, + private_imv_swima_state_t *this) +{ + return this->has_excl; +} + +METHOD(imv_state_t, set_flags, void, + private_imv_swima_state_t *this, bool has_long, bool has_excl) +{ + this->has_long = has_long; + this->has_excl = has_excl; +} + +METHOD(imv_state_t, set_max_msg_len, void, + private_imv_swima_state_t *this, uint32_t max_msg_len) +{ + this->max_msg_len = max_msg_len; +} + +METHOD(imv_state_t, get_max_msg_len, uint32_t, + private_imv_swima_state_t *this) +{ + return this->max_msg_len; +} + +METHOD(imv_state_t, set_action_flags, void, + private_imv_swima_state_t *this, uint32_t flags) +{ + this->action_flags |= flags; +} + +METHOD(imv_state_t, get_action_flags, uint32_t, + private_imv_swima_state_t *this) +{ + return this->action_flags; +} + +METHOD(imv_state_t, set_session, void, + private_imv_swima_state_t *this, imv_session_t *session) +{ + this->session = session; +} + +METHOD(imv_state_t, get_session, imv_session_t*, + private_imv_swima_state_t *this) +{ + return this->session; +} + +METHOD(imv_state_t, get_contracts, seg_contract_manager_t*, + private_imv_swima_state_t *this) +{ + return this->contracts; +} + +METHOD(imv_state_t, change_state, void, + private_imv_swima_state_t *this, TNC_ConnectionState new_state) +{ + this->state = new_state; +} + +METHOD(imv_state_t, get_recommendation, void, + private_imv_swima_state_t *this, TNC_IMV_Action_Recommendation *rec, + TNC_IMV_Evaluation_Result *eval) +{ + *rec = this->rec; + *eval = this->eval; +} + +METHOD(imv_state_t, set_recommendation, void, + private_imv_swima_state_t *this, TNC_IMV_Action_Recommendation rec, + TNC_IMV_Evaluation_Result eval) +{ + this->rec = rec; + this->eval = eval; +} + +METHOD(imv_state_t, update_recommendation, void, + private_imv_swima_state_t *this, TNC_IMV_Action_Recommendation rec, + TNC_IMV_Evaluation_Result eval) +{ + this->rec = tncif_policy_update_recommendation(this->rec, rec); + this->eval = tncif_policy_update_evaluation(this->eval, eval); +} + +METHOD(imv_state_t, get_reason_string, bool, + private_imv_swima_state_t *this, enumerator_t *language_enumerator, + chunk_t *reason_string, char **reason_language) +{ + return FALSE; +} + +METHOD(imv_state_t, get_remediation_instructions, bool, + private_imv_swima_state_t *this, enumerator_t *language_enumerator, + chunk_t *string, char **lang_code, char **uri) +{ + return FALSE; +} + +METHOD(imv_state_t, destroy, void, + private_imv_swima_state_t *this) +{ + json_object_put(this->jobj); + DESTROY_IF(this->session); + DESTROY_IF(this->reason_string); + DESTROY_IF(this->remediation_string); + this->contracts->destroy(this->contracts); + free(this); +} + +METHOD(imv_swima_state_t, set_handshake_state, void, + private_imv_swima_state_t *this, imv_swima_handshake_state_t new_state) +{ + this->handshake_state = new_state; +} + +METHOD(imv_swima_state_t, get_handshake_state, imv_swima_handshake_state_t, + private_imv_swima_state_t *this) +{ + return this->handshake_state; +} + +METHOD(imv_swima_state_t, set_request_id, void, + private_imv_swima_state_t *this, uint32_t request_id) +{ + this->request_id = request_id; +} + +METHOD(imv_swima_state_t, get_request_id, uint32_t, + private_imv_swima_state_t *this) +{ + return this->request_id; +} + +METHOD(imv_swima_state_t, set_inventory, void, + private_imv_swima_state_t *this, swima_inventory_t *inventory) +{ + chunk_t sw_id, sw_locator; + uint32_t record_id; + char *sw_id_str; + json_object *jstring; + swima_record_t *sw_record; + enumerator_t *enumerator; + + if (this->sw_id_count == 0) + { + this->jarray = json_object_new_array(); + json_object_object_add(this->jobj, "data", this->jarray); + } + + enumerator = inventory->create_enumerator(inventory); + while (enumerator->enumerate(enumerator, &sw_record)) + { + record_id = sw_record->get_record_id(sw_record); + sw_id = sw_record->get_sw_id(sw_record, &sw_locator); + sw_id_str = strndup(sw_id.ptr, sw_id.len); + if (sw_locator.len) + { + DBG3(DBG_IMV, "%6u: %s @ %.*s", record_id, sw_id_str, + sw_locator.len, sw_locator.ptr); + } + else + { + DBG3(DBG_IMV, "%6u: %s", record_id, sw_id_str); + } + + /* Add software identity to JSON array */ + jstring = json_object_new_string(sw_id_str); + json_object_array_add(this->jarray, jstring); + free(sw_id_str); + } + enumerator->destroy(enumerator); +} + +METHOD(imv_swima_state_t, set_events, void, + private_imv_swima_state_t *this, swima_events_t *events) +{ + chunk_t sw_id, timestamp; + uint32_t record_id, eid, last_eid, epoch, source_id, action; + char *sw_id_str, *timestamp_str; + json_object *jevent, *jvalue, *jstring; + swima_event_t *sw_event; + swima_record_t *sw_record; + enumerator_t *enumerator; + + if (this->sw_id_count == 0) + { + last_eid = events->get_eid(events, &epoch, NULL); + jvalue = json_object_new_int(epoch); + json_object_object_add(this->jobj, "epoch", jvalue); + jvalue = json_object_new_int(last_eid); + json_object_object_add(this->jobj, "lastEid", jvalue); + this->jarray = json_object_new_array(); + json_object_object_add(this->jobj, "events", this->jarray); + } + + enumerator = events->create_enumerator(events); + while (enumerator->enumerate(enumerator, &sw_event)) + { + eid = sw_event->get_eid(sw_event, ×tamp); + timestamp_str = strndup(timestamp.ptr, timestamp.len); + action = sw_event->get_action(sw_event); + sw_record = sw_event->get_sw_record(sw_event); + record_id = sw_record->get_record_id(sw_record); + source_id = sw_record->get_source_id(sw_record); + sw_id = sw_record->get_sw_id(sw_record, NULL); + sw_id_str = strndup(sw_id.ptr, sw_id.len); + DBG3(DBG_IMV, "%3u %.*s %u %5u: %s", eid, timestamp.len, timestamp.ptr, + action, record_id, sw_id_str); + + /* Add software event to JSON array */ + jevent = json_object_new_object(); + jvalue = json_object_new_int(eid); + json_object_object_add(jevent, "eid", jvalue); + jstring = json_object_new_string(timestamp_str); + json_object_object_add(jevent, "timestamp", jstring); + jvalue = json_object_new_int(record_id); + json_object_object_add(jevent, "recordId", jvalue); + jvalue = json_object_new_int(source_id); + json_object_object_add(jevent, "sourceId", jvalue); + jvalue = json_object_new_int(action); + json_object_object_add(jevent, "action", jvalue); + jstring = json_object_new_string(sw_id_str); + json_object_object_add(jevent, "softwareId", jstring); + json_object_array_add(this->jarray, jevent); + free(timestamp_str); + free(sw_id_str); + } + enumerator->destroy(enumerator); +} + +METHOD(imv_swima_state_t, get_jrequest, json_object*, + private_imv_swima_state_t *this) +{ + return this->jobj; +} + +METHOD(imv_swima_state_t, set_missing, void, + private_imv_swima_state_t *this, uint32_t count) +{ + this->missing = count; +} + +METHOD(imv_swima_state_t, get_missing, uint32_t, + private_imv_swima_state_t *this) +{ + return this->missing; +} + +METHOD(imv_swima_state_t, set_count, void, + private_imv_swima_state_t *this, int sw_id_count, int tag_count, + TNC_UInt32 imc_id) +{ + this->sw_id_count += sw_id_count; + this->tag_count += tag_count; + this->imc_id = imc_id; +} + +METHOD(imv_swima_state_t, get_count, void, + private_imv_swima_state_t *this, int *sw_id_count, int *tag_count) +{ + if (sw_id_count) + { + *sw_id_count = this->sw_id_count; + } + if (tag_count) + { + *tag_count = this->tag_count; + } +} + +METHOD(imv_swima_state_t, get_imc_id, TNC_UInt32, + private_imv_swima_state_t *this) +{ + return this->imc_id; +} + +/** + * Described in header. + */ +imv_state_t *imv_swima_state_create(TNC_ConnectionID connection_id) +{ + private_imv_swima_state_t *this; + + INIT(this, + .public = { + .interface = { + .get_connection_id = _get_connection_id, + .has_long = _has_long, + .has_excl = _has_excl, + .set_flags = _set_flags, + .set_max_msg_len = _set_max_msg_len, + .get_max_msg_len = _get_max_msg_len, + .set_action_flags = _set_action_flags, + .get_action_flags = _get_action_flags, + .set_session = _set_session, + .get_session= _get_session, + .get_contracts = _get_contracts, + .change_state = _change_state, + .get_recommendation = _get_recommendation, + .set_recommendation = _set_recommendation, + .update_recommendation = _update_recommendation, + .get_reason_string = _get_reason_string, + .get_remediation_instructions = _get_remediation_instructions, + .destroy = _destroy, + }, + .set_handshake_state = _set_handshake_state, + .get_handshake_state = _get_handshake_state, + .set_request_id = _set_request_id, + .get_request_id = _get_request_id, + .set_inventory = _set_inventory, + .set_events = _set_events, + .get_jrequest = _get_jrequest, + .set_missing = _set_missing, + .get_missing = _get_missing, + .set_count = _set_count, + .get_count = _get_count, + .get_imc_id = _get_imc_id, + }, + .state = TNC_CONNECTION_STATE_CREATE, + .rec = TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION, + .eval = TNC_IMV_EVALUATION_RESULT_DONT_KNOW, + .connection_id = connection_id, + .contracts = seg_contract_manager_create(), + .imc_id = TNC_IMCID_ANY, + .jobj = json_object_new_object(), + ); + + return &this->public.interface; +} + + diff --git a/src/libimcv/plugins/imv_swima/imv_swima_state.h b/src/libimcv/plugins/imv_swima/imv_swima_state.h new file mode 100644 index 000000000..4fa32daf4 --- /dev/null +++ b/src/libimcv/plugins/imv_swima/imv_swima_state.h @@ -0,0 +1,153 @@ +/* + * Copyright (C) 2017 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 <http://www.fsf.org/copyleft/gpl.txt>. + * + * 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. + */ + +/** + * @defgroup imv_swima imv_swima + * @ingroup libimcv_plugins + * + * @defgroup imv_swima_state_t imv_swima_state + * @{ @ingroup imv_swima + */ + +#ifndef IMV_SWIMA_STATE_H_ +#define IMV_SWIMA_STATE_H_ + +#include <imv/imv_state.h> +#include <swima/swima_inventory.h> +#include <swima/swima_events.h> +#include <library.h> + +#include <json.h> + +typedef struct imv_swima_state_t imv_swima_state_t; +typedef enum imv_swima_handshake_state_t imv_swima_handshake_state_t; + +/** + * IMV OS Handshake States (state machine) + */ +enum imv_swima_handshake_state_t { + IMV_SWIMA_STATE_INIT, + IMV_SWIMA_STATE_WORKITEMS, + IMV_SWIMA_STATE_END +}; + +/** + * Internal state of an imv_swima_t connection instance + */ +struct imv_swima_state_t { + + /** + * imv_state_t interface + */ + imv_state_t interface; + + /** + * Set state of the handshake + * + * @param new_state the handshake state of IMV + */ + void (*set_handshake_state)(imv_swima_state_t *this, + imv_swima_handshake_state_t new_state); + + /** + * Get state of the handshake + * + * @return the handshake state of IMV + */ + imv_swima_handshake_state_t (*get_handshake_state)(imv_swima_state_t *this); + + /** + * Set the SWID request ID + * + * @param request_id SWID request ID to be set + */ + void (*set_request_id)(imv_swima_state_t *this, uint32_t request_id); + + /** + * Get the SWID request ID + * + * @return SWID request ID + */ + uint32_t (*get_request_id)(imv_swima_state_t *this); + + /** + * Set or extend the SW ID inventory in the state + * + * @param inventory SW ID inventory to be added + */ + void (*set_inventory)(imv_swima_state_t *this, swima_inventory_t *inventory); + + /** + * Set or extend the SW ID events in the state + * + * @param events SW ID events to be added + */ + void (*set_events)(imv_swima_state_t *this, swima_events_t *events); + + /** + * Get the JSON encoding of the complete SW ID inventory or SW ID events + * + * @return JSON encoding + */ + json_object* (*get_jrequest)(imv_swima_state_t *this); + + /** + * Set the number of still missing SW [ID] records or envents + * + * @param count Number of missing SW [ID] records or envents + */ + void (*set_missing)(imv_swima_state_t *this, uint32_t count); + + /** + * Get the number of still missing SWID Tags or Tag IDs + * + * @result Number of missing SWID Tags or Tag IDs + */ + uint32_t (*get_missing)(imv_swima_state_t *this); + + /** + * Set [or with multiple attributes increment] SWID Tag [ID] counters + * + * @param tag_id_count Number of received SWID Tag IDs + * @param tag_count Number of received SWID Tags + * @param imc_id SWID IMC ID + */ + void (*set_count)(imv_swima_state_t *this, int tag_id_count, int tag_count, + TNC_UInt32 imc_id); + + /** + * Set [or with multiple attributes increment] SWID Tag [ID] counters + * + * @param tag_id_count Number of received SWID Tag IDs + * @param tag_count Number of received SWID Tags + */ + void (*get_count)(imv_swima_state_t *this, int *tag_id_count, int *tag_count); + + /** + * Get SWID IMC ID + * + * @return SWID IMC ID + */ + TNC_UInt32 (*get_imc_id)(imv_swima_state_t *this); +}; + +/** + * Create an imv_swima_state_t instance + * + * @param id connection ID + */ +imv_state_t* imv_swima_state_create(TNC_ConnectionID id); + +#endif /** IMV_SWIMA_STATE_H_ @}*/ |