diff options
Diffstat (limited to 'src/libimcv/plugins/imc_attestation')
7 files changed, 1993 insertions, 0 deletions
diff --git a/src/libimcv/plugins/imc_attestation/Makefile.am b/src/libimcv/plugins/imc_attestation/Makefile.am new file mode 100644 index 000000000..e7b1f1ce1 --- /dev/null +++ b/src/libimcv/plugins/imc_attestation/Makefile.am @@ -0,0 +1,18 @@ +AM_CPPFLAGS = \ + -I$(top_srcdir)/src/libstrongswan \ + -I$(top_srcdir)/src/libtncif \ + -I$(top_srcdir)/src/libimcv + +AM_CFLAGS = \ + $(PLUGIN_CFLAGS) + +imcv_LTLIBRARIES = imc-attestation.la + +imc_attestation_la_LIBADD = $(top_builddir)/src/libimcv/libimcv.la \ + $(top_builddir)/src/libstrongswan/libstrongswan.la + +imc_attestation_la_SOURCES = imc_attestation.c \ + imc_attestation_state.h imc_attestation_state.c \ + imc_attestation_process.h imc_attestation_process.c + +imc_attestation_la_LDFLAGS = -module -avoid-version -no-undefined diff --git a/src/libimcv/plugins/imc_attestation/Makefile.in b/src/libimcv/plugins/imc_attestation/Makefile.in new file mode 100644 index 000000000..3c5017f32 --- /dev/null +++ b/src/libimcv/plugins/imc_attestation/Makefile.in @@ -0,0 +1,765 @@ +# Makefile.in generated by automake 1.14.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2013 Free Software Foundation, Inc. + +# This Makefile.in is free software; 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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 "imc_attestation_state.h" +#include "imc_attestation_process.h" + +#include <imc/imc_agent.h> +#include <imc/imc_msg.h> +#include <ietf/ietf_attr.h> +#include <ietf/ietf_attr_pa_tnc_error.h> +#include <ietf/ietf_attr_product_info.h> +#include <ietf/ietf_attr_string_version.h> +#include <ietf/ietf_attr_assess_result.h> +#include <tcg/pts/tcg_pts_attr_proto_caps.h> +#include <tcg/pts/tcg_pts_attr_meas_algo.h> +#include <os_info/os_info.h> +#include <pts/pts_error.h> + +#include <tncif_pa_subtypes.h> + +#include <pen/pen.h> +#include <utils/debug.h> +#include <collections/linked_list.h> + +/* IMC definitions */ + +static const char imc_name[] = "Attestation"; + +static pen_type_t msg_types[] = { + { PEN_TCG, PA_SUBTYPE_TCG_PTS } +}; + +static imc_agent_t *imc_attestation; + +/** + * Supported PTS measurement algorithms + */ +static pts_meas_algorithms_t supported_algorithms = PTS_MEAS_ALGO_NONE; + +/** + * Supported PTS Diffie Hellman Groups + */ +static pts_dh_group_t supported_dh_groups = PTS_DH_GROUP_NONE; + +/** + * see section 3.8.1 of TCG TNC IF-IMC Specification 1.3 + */ +TNC_Result TNC_IMC_API TNC_IMC_Initialize(TNC_IMCID imc_id, + TNC_Version min_version, + TNC_Version max_version, + TNC_Version *actual_version) +{ + bool mandatory_dh_groups; + + if (imc_attestation) + { + DBG1(DBG_IMC, "IMC \"%s\" has already been initialized", imc_name); + return TNC_RESULT_ALREADY_INITIALIZED; + } + imc_attestation = imc_agent_create(imc_name, msg_types, countof(msg_types), + imc_id, actual_version); + if (!imc_attestation) + { + return TNC_RESULT_FATAL; + } + + mandatory_dh_groups = lib->settings->get_bool(lib->settings, + "%s.plugins.imc-attestation.mandatory_dh_groups", TRUE, lib->ns); + + if (!pts_meas_algo_probe(&supported_algorithms) || + !pts_dh_group_probe(&supported_dh_groups, mandatory_dh_groups)) + { + imc_attestation->destroy(imc_attestation); + imc_attestation = NULL; + return TNC_RESULT_FATAL; + } + + if (min_version > TNC_IFIMC_VERSION_1 || max_version < TNC_IFIMC_VERSION_1) + { + DBG1(DBG_IMC, "no common IF-IMC version"); + return TNC_RESULT_NO_COMMON_VERSION; + } + return TNC_RESULT_SUCCESS; +} + +/** + * see section 3.8.2 of TCG TNC IF-IMC Specification 1.3 + */ +TNC_Result TNC_IMC_API TNC_IMC_NotifyConnectionChange(TNC_IMCID imc_id, + TNC_ConnectionID connection_id, + TNC_ConnectionState new_state) +{ + imc_state_t *state; + + if (!imc_attestation) + { + DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name); + return TNC_RESULT_NOT_INITIALIZED; + } + switch (new_state) + { + case TNC_CONNECTION_STATE_CREATE: + state = imc_attestation_state_create(connection_id); + return imc_attestation->create_state(imc_attestation, state); + case TNC_CONNECTION_STATE_HANDSHAKE: + if (imc_attestation->change_state(imc_attestation, connection_id, + new_state, &state) != TNC_RESULT_SUCCESS) + { + return TNC_RESULT_FATAL; + } + state->set_result(state, imc_id, + TNC_IMV_EVALUATION_RESULT_DONT_KNOW); + return TNC_RESULT_SUCCESS; + case TNC_CONNECTION_STATE_DELETE: + return imc_attestation->delete_state(imc_attestation, connection_id); + case TNC_CONNECTION_STATE_ACCESS_ISOLATED: + case TNC_CONNECTION_STATE_ACCESS_NONE: + default: + return imc_attestation->change_state(imc_attestation, connection_id, + new_state, NULL); + } +} + + +/** + * see section 3.8.3 of TCG TNC IF-IMC Specification 1.3 + */ +TNC_Result TNC_IMC_API TNC_IMC_BeginHandshake(TNC_IMCID imc_id, + TNC_ConnectionID connection_id) +{ + if (!imc_attestation) + { + DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name); + return TNC_RESULT_NOT_INITIALIZED; + } + + return TNC_RESULT_SUCCESS; +} + +static TNC_Result receive_message(imc_state_t *state, imc_msg_t *in_msg) +{ + imc_msg_t *out_msg; + imc_attestation_state_t *attestation_state; + enumerator_t *enumerator; + pa_tnc_attr_t *attr; + pen_type_t type; + TNC_Result result; + bool fatal_error = FALSE; + + /* generate an outgoing PA-TNC message - we might need it */ + out_msg = imc_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; + } + + /* 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) + { + if (type.type == 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_IMC, "received TCG-PTS error '%N'", + pts_error_code_names, error_code.type); + DBG1(DBG_IMC, "error information: %B", &msg_info); + + result = TNC_RESULT_FATAL; + } + } + } + else if (type.vendor_id == PEN_TCG) + { + attestation_state = (imc_attestation_state_t*)state; + + if (!imc_attestation_process(attr, out_msg, attestation_state, + supported_algorithms, supported_dh_groups)) + { + result = TNC_RESULT_FATAL; + break; + } + } + } + enumerator->destroy(enumerator); + + if (result == TNC_RESULT_SUCCESS) + { + /* send PA-TNC message with the EXCL flag set */ + result = out_msg->send(out_msg, TRUE); + } + out_msg->destroy(out_msg); + + return result; +} + +/** + * see section 3.8.4 of TCG TNC IF-IMC Specification 1.3 + */ +TNC_Result TNC_IMC_API TNC_IMC_ReceiveMessage(TNC_IMCID imc_id, + TNC_ConnectionID connection_id, + TNC_BufferReference msg, + TNC_UInt32 msg_len, + TNC_MessageType msg_type) +{ + imc_state_t *state; + imc_msg_t *in_msg; + TNC_Result result; + + if (!imc_attestation) + { + DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name); + return TNC_RESULT_NOT_INITIALIZED; + } + if (!imc_attestation->get_state(imc_attestation, connection_id, &state)) + { + return TNC_RESULT_FATAL; + } + + in_msg = imc_msg_create_from_data(imc_attestation, state, connection_id, + msg_type, chunk_create(msg, msg_len)); + result = receive_message(state, in_msg); + in_msg->destroy(in_msg); + + return result; +} + +/** + * see section 3.8.6 of TCG TNC IF-IMV Specification 1.3 + */ +TNC_Result TNC_IMC_API TNC_IMC_ReceiveMessageLong(TNC_IMCID imc_id, + TNC_ConnectionID connection_id, + TNC_UInt32 msg_flags, + TNC_BufferReference msg, + TNC_UInt32 msg_len, + TNC_VendorID msg_vid, + TNC_MessageSubtype msg_subtype, + TNC_UInt32 src_imv_id, + TNC_UInt32 dst_imc_id) +{ + imc_state_t *state; + imc_msg_t *in_msg; + TNC_Result result; + + if (!imc_attestation) + { + DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name); + return TNC_RESULT_NOT_INITIALIZED; + } + if (!imc_attestation->get_state(imc_attestation, connection_id, &state)) + { + return TNC_RESULT_FATAL; + } + in_msg = imc_msg_create_from_long_data(imc_attestation, state, connection_id, + src_imv_id, dst_imc_id, msg_vid, msg_subtype, + chunk_create(msg, msg_len)); + result =receive_message(state, in_msg); + in_msg->destroy(in_msg); + + return result; +} + +/** + * see section 3.8.7 of TCG TNC IF-IMC Specification 1.3 + */ +TNC_Result TNC_IMC_API TNC_IMC_BatchEnding(TNC_IMCID imc_id, + TNC_ConnectionID connection_id) +{ + if (!imc_attestation) + { + DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name); + return TNC_RESULT_NOT_INITIALIZED; + } + return TNC_RESULT_SUCCESS; +} + +/** + * see section 3.8.8 of TCG TNC IF-IMC Specification 1.3 + */ +TNC_Result TNC_IMC_API TNC_IMC_Terminate(TNC_IMCID imc_id) +{ + if (!imc_attestation) + { + DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name); + return TNC_RESULT_NOT_INITIALIZED; + } + imc_attestation->destroy(imc_attestation); + imc_attestation = NULL; + + return TNC_RESULT_SUCCESS; +} + +/** + * see section 4.2.8.1 of TCG TNC IF-IMC Specification 1.3 + */ +TNC_Result TNC_IMC_API TNC_IMC_ProvideBindFunction(TNC_IMCID imc_id, + TNC_TNCC_BindFunctionPointer bind_function) +{ + if (!imc_attestation) + { + DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name); + return TNC_RESULT_NOT_INITIALIZED; + } + return imc_attestation->bind_functions(imc_attestation, bind_function); +} diff --git a/src/libimcv/plugins/imc_attestation/imc_attestation_process.c b/src/libimcv/plugins/imc_attestation/imc_attestation_process.c new file mode 100644 index 000000000..2fc2998e1 --- /dev/null +++ b/src/libimcv/plugins/imc_attestation/imc_attestation_process.c @@ -0,0 +1,480 @@ +/* + * Copyright (C) 2011-2012 Sansar Choinyambuu, 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> +/* for isdigit */ +#include <ctype.h> + +#include "imc_attestation_process.h" + +#include <ietf/ietf_attr_pa_tnc_error.h> + +#include <pts/pts.h> + +#include <tcg/pts/tcg_pts_attr_proto_caps.h> +#include <tcg/pts/tcg_pts_attr_meas_algo.h> +#include <tcg/pts/tcg_pts_attr_dh_nonce_params_req.h> +#include <tcg/pts/tcg_pts_attr_dh_nonce_params_resp.h> +#include <tcg/pts/tcg_pts_attr_dh_nonce_finish.h> +#include <tcg/pts/tcg_pts_attr_get_tpm_version_info.h> +#include <tcg/pts/tcg_pts_attr_tpm_version_info.h> +#include <tcg/pts/tcg_pts_attr_get_aik.h> +#include <tcg/pts/tcg_pts_attr_aik.h> +#include <tcg/pts/tcg_pts_attr_req_func_comp_evid.h> +#include <tcg/pts/tcg_pts_attr_gen_attest_evid.h> +#include <tcg/pts/tcg_pts_attr_simple_comp_evid.h> +#include <tcg/pts/tcg_pts_attr_simple_evid_final.h> +#include <tcg/pts/tcg_pts_attr_req_file_meas.h> +#include <tcg/pts/tcg_pts_attr_file_meas.h> +#include <tcg/pts/tcg_pts_attr_req_file_meta.h> +#include <tcg/pts/tcg_pts_attr_unix_file_meta.h> + +#include <utils/debug.h> +#include <utils/lexparser.h> + +#define DEFAULT_NONCE_LEN 20 + +bool imc_attestation_process(pa_tnc_attr_t *attr, imc_msg_t *msg, + imc_attestation_state_t *attestation_state, + pts_meas_algorithms_t supported_algorithms, + pts_dh_group_t supported_dh_groups) +{ + chunk_t attr_info; + pts_t *pts; + pts_error_code_t pts_error; + pen_type_t attr_type; + bool valid_path; + + pts = attestation_state->get_pts(attestation_state); + attr_type = attr->get_type(attr); + + switch (attr_type.type) + { + case TCG_PTS_REQ_PROTO_CAPS: + { + tcg_pts_attr_proto_caps_t *attr_cast; + pts_proto_caps_flag_t imc_caps, imv_caps; + + attr_cast = (tcg_pts_attr_proto_caps_t*)attr; + imv_caps = attr_cast->get_flags(attr_cast); + imc_caps = pts->get_proto_caps(pts); + pts->set_proto_caps(pts, imc_caps & imv_caps); + + /* Send PTS Protocol Capabilities attribute */ + attr = tcg_pts_attr_proto_caps_create(imc_caps & imv_caps, FALSE); + msg->add_attribute(msg, attr); + break; + } + case TCG_PTS_MEAS_ALGO: + { + tcg_pts_attr_meas_algo_t *attr_cast; + pts_meas_algorithms_t offered_algorithms, selected_algorithm; + + attr_cast = (tcg_pts_attr_meas_algo_t*)attr; + offered_algorithms = attr_cast->get_algorithms(attr_cast); + selected_algorithm = pts_meas_algo_select(supported_algorithms, + offered_algorithms); + if (selected_algorithm == PTS_MEAS_ALGO_NONE) + { + attr = pts_hash_alg_error_create(supported_algorithms); + msg->add_attribute(msg, attr); + break; + } + + /* Send Measurement Algorithm Selection attribute */ + pts->set_meas_algorithm(pts, selected_algorithm); + attr = tcg_pts_attr_meas_algo_create(selected_algorithm, TRUE); + msg->add_attribute(msg, attr); + break; + } + case TCG_PTS_DH_NONCE_PARAMS_REQ: + { + tcg_pts_attr_dh_nonce_params_req_t *attr_cast; + pts_dh_group_t offered_dh_groups, selected_dh_group; + chunk_t responder_value, responder_nonce; + int nonce_len, min_nonce_len; + + nonce_len = lib->settings->get_int(lib->settings, + "%s.plugins.imc-attestation.nonce_len", + DEFAULT_NONCE_LEN, lib->ns); + + attr_cast = (tcg_pts_attr_dh_nonce_params_req_t*)attr; + min_nonce_len = attr_cast->get_min_nonce_len(attr_cast); + if (nonce_len < PTS_MIN_NONCE_LEN || + (min_nonce_len > 0 && nonce_len < min_nonce_len)) + { + attr = pts_dh_nonce_error_create(nonce_len, PTS_MAX_NONCE_LEN); + msg->add_attribute(msg, attr); + break; + } + + offered_dh_groups = attr_cast->get_dh_groups(attr_cast); + selected_dh_group = pts_dh_group_select(supported_dh_groups, + offered_dh_groups); + if (selected_dh_group == PTS_DH_GROUP_NONE) + { + attr = pts_dh_group_error_create(supported_dh_groups); + msg->add_attribute(msg, attr); + break; + } + + /* Create own DH factor and nonce */ + if (!pts->create_dh_nonce(pts, selected_dh_group, nonce_len)) + { + return FALSE; + } + pts->get_my_public_value(pts, &responder_value, &responder_nonce); + + /* Send DH Nonce Parameters Response attribute */ + attr = tcg_pts_attr_dh_nonce_params_resp_create(selected_dh_group, + supported_algorithms, responder_nonce, responder_value); + msg->add_attribute(msg, attr); + break; + } + case TCG_PTS_DH_NONCE_FINISH: + { + tcg_pts_attr_dh_nonce_finish_t *attr_cast; + pts_meas_algorithms_t selected_algorithm; + chunk_t initiator_nonce, initiator_value; + int nonce_len; + + attr_cast = (tcg_pts_attr_dh_nonce_finish_t*)attr; + selected_algorithm = attr_cast->get_hash_algo(attr_cast); + if (!(selected_algorithm & supported_algorithms)) + { + DBG1(DBG_IMC, "PTS-IMV selected unsupported DH hash algorithm"); + return FALSE; + } + pts->set_dh_hash_algorithm(pts, selected_algorithm); + + initiator_value = attr_cast->get_initiator_value(attr_cast); + initiator_nonce = attr_cast->get_initiator_nonce(attr_cast); + + nonce_len = lib->settings->get_int(lib->settings, + "%s.plugins.imc-attestation.nonce_len", + DEFAULT_NONCE_LEN, lib->ns); + if (nonce_len != initiator_nonce.len) + { + DBG1(DBG_IMC, "initiator and responder DH nonces " + "have differing lengths"); + return FALSE; + } + + pts->set_peer_public_value(pts, initiator_value, initiator_nonce); + if (!pts->calculate_secret(pts)) + { + return FALSE; + } + break; + } + case TCG_PTS_GET_TPM_VERSION_INFO: + { + chunk_t tpm_version_info, attr_info; + pen_type_t error_code = { PEN_TCG, TCG_PTS_TPM_VERS_NOT_SUPPORTED }; + + if (!pts->get_tpm_version_info(pts, &tpm_version_info)) + { + attr_info = attr->get_value(attr); + attr = ietf_attr_pa_tnc_error_create(error_code, attr_info); + msg->add_attribute(msg, attr); + break; + } + + /* Send TPM Version Info attribute */ + attr = tcg_pts_attr_tpm_version_info_create(tpm_version_info); + msg->add_attribute(msg, attr); + break; + } + case TCG_PTS_GET_AIK: + { + certificate_t *aik; + + aik = pts->get_aik(pts); + if (!aik) + { + DBG1(DBG_IMC, "no AIK certificate or public key available"); + break; + } + + /* Send AIK attribute */ + attr = tcg_pts_attr_aik_create(aik); + msg->add_attribute(msg, attr); + break; + } + case TCG_PTS_REQ_FILE_MEAS: + { + tcg_pts_attr_req_file_meas_t *attr_cast; + char *pathname; + u_int16_t request_id; + bool is_directory; + u_int32_t delimiter; + pts_file_meas_t *measurements; + pen_type_t error_code; + + attr_info = attr->get_value(attr); + attr_cast = (tcg_pts_attr_req_file_meas_t*)attr; + is_directory = attr_cast->get_directory_flag(attr_cast); + request_id = attr_cast->get_request_id(attr_cast); + delimiter = attr_cast->get_delimiter(attr_cast); + pathname = attr_cast->get_pathname(attr_cast); + valid_path = pts->is_path_valid(pts, pathname, &pts_error); + + if (valid_path && pts_error) + { + error_code = pen_type_create(PEN_TCG, pts_error); + attr = ietf_attr_pa_tnc_error_create(error_code, attr_info); + msg->add_attribute(msg, attr); + break; + } + else if (!valid_path) + { + break; + } + + if (delimiter != SOLIDUS_UTF && delimiter != REVERSE_SOLIDUS_UTF) + { + error_code = pen_type_create(PEN_TCG, + TCG_PTS_INVALID_DELIMITER); + attr = ietf_attr_pa_tnc_error_create(error_code, attr_info); + msg->add_attribute(msg, attr); + break; + } + + /* Do PTS File Measurements and send them to PTS-IMV */ + DBG2(DBG_IMC, "measurement request %d for %s '%s'", + request_id, is_directory ? "directory" : "file", + pathname); + measurements = pts_file_meas_create_from_path(request_id, + pathname, is_directory, TRUE, + pts->get_meas_algorithm(pts)); + if (!measurements) + { + /* TODO handle error codes from measurements */ + return FALSE; + } + attr = tcg_pts_attr_file_meas_create(measurements); + attr->set_noskip_flag(attr, TRUE); + msg->add_attribute(msg, attr); + break; + } + case TCG_PTS_REQ_FILE_META: + { + tcg_pts_attr_req_file_meta_t *attr_cast; + char *pathname; + bool is_directory; + u_int8_t delimiter; + pts_file_meta_t *metadata; + pen_type_t error_code; + + attr_info = attr->get_value(attr); + attr_cast = (tcg_pts_attr_req_file_meta_t*)attr; + is_directory = attr_cast->get_directory_flag(attr_cast); + delimiter = attr_cast->get_delimiter(attr_cast); + pathname = attr_cast->get_pathname(attr_cast); + + valid_path = pts->is_path_valid(pts, pathname, &pts_error); + if (valid_path && pts_error) + { + error_code = pen_type_create(PEN_TCG, pts_error); + attr = ietf_attr_pa_tnc_error_create(error_code, attr_info); + msg->add_attribute(msg, attr); + break; + } + else if (!valid_path) + { + break; + } + if (delimiter != SOLIDUS_UTF && delimiter != REVERSE_SOLIDUS_UTF) + { + error_code = pen_type_create(PEN_TCG, + TCG_PTS_INVALID_DELIMITER); + attr = ietf_attr_pa_tnc_error_create(error_code, attr_info); + msg->add_attribute(msg, attr); + break; + } + /* Get File Metadata and send them to PTS-IMV */ + DBG2(DBG_IMC, "metadata request for %s '%s'", + is_directory ? "directory" : "file", + pathname); + metadata = pts->get_metadata(pts, pathname, is_directory); + + if (!metadata) + { + /* TODO handle error codes from measurements */ + return FALSE; + } + attr = tcg_pts_attr_unix_file_meta_create(metadata); + attr->set_noskip_flag(attr, TRUE); + msg->add_attribute(msg, attr); + break; + } + case TCG_PTS_REQ_FUNC_COMP_EVID: + { + tcg_pts_attr_req_func_comp_evid_t *attr_cast; + pts_proto_caps_flag_t negotiated_caps; + pts_comp_func_name_t *name; + pts_comp_evidence_t *evid; + pts_component_t *comp; + pen_type_t error_code; + u_int32_t depth; + u_int8_t flags; + status_t status; + enumerator_t *e; + + attr_info = attr->get_value(attr); + attr_cast = (tcg_pts_attr_req_func_comp_evid_t*)attr; + + DBG1(DBG_IMC, "evidence requested for %d functional components", + attr_cast->get_count(attr_cast)); + + e = attr_cast->create_enumerator(attr_cast); + while (e->enumerate(e, &flags, &depth, &name)) + { + name->log(name, "* "); + negotiated_caps = pts->get_proto_caps(pts); + + if (flags & PTS_REQ_FUNC_COMP_EVID_TTC) + { + error_code = pen_type_create(PEN_TCG, + TCG_PTS_UNABLE_DET_TTC); + attr = ietf_attr_pa_tnc_error_create(error_code, attr_info); + msg->add_attribute(msg, attr); + break; + } + if (flags & PTS_REQ_FUNC_COMP_EVID_VER && + !(negotiated_caps & PTS_PROTO_CAPS_V)) + { + error_code = pen_type_create(PEN_TCG, + TCG_PTS_UNABLE_LOCAL_VAL); + attr = ietf_attr_pa_tnc_error_create(error_code, attr_info); + msg->add_attribute(msg, attr); + break; + } + if (flags & PTS_REQ_FUNC_COMP_EVID_CURR && + !(negotiated_caps & PTS_PROTO_CAPS_C)) + { + error_code = pen_type_create(PEN_TCG, + TCG_PTS_UNABLE_CUR_EVID); + attr = ietf_attr_pa_tnc_error_create(error_code, attr_info); + msg->add_attribute(msg, attr); + break; + } + if (flags & PTS_REQ_FUNC_COMP_EVID_PCR && + !(negotiated_caps & PTS_PROTO_CAPS_T)) + { + error_code = pen_type_create(PEN_TCG, + TCG_PTS_UNABLE_DET_PCR); + attr = ietf_attr_pa_tnc_error_create(error_code, attr_info); + msg->add_attribute(msg, attr); + break; + } + if (depth > 0) + { + DBG1(DBG_IMC, "the Attestation IMC currently does not " + "support sub component measurements"); + return FALSE; + } + comp = attestation_state->create_component(attestation_state, + name, depth); + if (!comp) + { + DBG2(DBG_IMC, " not registered: no evidence provided"); + continue; + } + + /* do the component evidence measurement[s] and cache them */ + do + { + status = comp->measure(comp, name->get_qualifier(name), + pts, &evid); + if (status == FAILED) + { + break; + } + attestation_state->add_evidence(attestation_state, evid); + } + while (status == NEED_MORE); + } + e->destroy(e); + break; + } + case TCG_PTS_GEN_ATTEST_EVID: + { + pts_simple_evid_final_flag_t flags; + pts_meas_algorithms_t comp_hash_algorithm; + pts_comp_evidence_t *evid; + chunk_t pcr_composite, quote_sig; + bool use_quote2; + + /* Send cached Component Evidence entries */ + while (attestation_state->next_evidence(attestation_state, &evid)) + { + attr = tcg_pts_attr_simple_comp_evid_create(evid); + msg->add_attribute(msg, attr); + } + + use_quote2 = lib->settings->get_bool(lib->settings, + "%s.plugins.imc-attestation.use_quote2", TRUE, + lib->ns); + if (!pts->quote_tpm(pts, use_quote2, &pcr_composite, "e_sig)) + { + DBG1(DBG_IMC, "error occurred during TPM quote operation"); + return FALSE; + } + + /* Send Simple Evidence Final attribute */ + flags = use_quote2 ? PTS_SIMPLE_EVID_FINAL_QUOTE_INFO2 : + PTS_SIMPLE_EVID_FINAL_QUOTE_INFO; + comp_hash_algorithm = PTS_MEAS_ALGO_SHA1; + + attr = tcg_pts_attr_simple_evid_final_create(flags, + comp_hash_algorithm, pcr_composite, quote_sig); + msg->add_attribute(msg, attr); + break; + } + case TCG_SEG_MAX_ATTR_SIZE_REQ: + case TCG_SEG_NEXT_SEG_REQ: + break; + + /* TODO: Not implemented yet */ + case TCG_PTS_REQ_INTEG_MEAS_LOG: + /* Attributes using XML */ + case TCG_PTS_REQ_TEMPL_REF_MANI_SET_META: + case TCG_PTS_UPDATE_TEMPL_REF_MANI: + /* On Windows only*/ + case TCG_PTS_REQ_REGISTRY_VALUE: + /* Received on IMV side only*/ + case TCG_PTS_PROTO_CAPS: + case TCG_PTS_DH_NONCE_PARAMS_RESP: + case TCG_PTS_MEAS_ALGO_SELECTION: + case TCG_PTS_TPM_VERSION_INFO: + case TCG_PTS_TEMPL_REF_MANI_SET_META: + case TCG_PTS_AIK: + case TCG_PTS_SIMPLE_COMP_EVID: + case TCG_PTS_SIMPLE_EVID_FINAL: + case TCG_PTS_VERIFICATION_RESULT: + case TCG_PTS_INTEG_REPORT: + case TCG_PTS_UNIX_FILE_META: + case TCG_PTS_FILE_MEAS: + case TCG_PTS_INTEG_MEAS_LOG: + default: + DBG1(DBG_IMC, "received unsupported attribute '%N/%N'", + pen_names, PEN_TCG, tcg_attr_names, attr_type.type); + break; + } + return TRUE; +} diff --git a/src/libimcv/plugins/imc_attestation/imc_attestation_process.h b/src/libimcv/plugins/imc_attestation/imc_attestation_process.h new file mode 100644 index 000000000..a2f1b4e3c --- /dev/null +++ b/src/libimcv/plugins/imc_attestation/imc_attestation_process.h @@ -0,0 +1,49 @@ +/* + * Copyright (C) 2011 Sansar Choinyambuu + * 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 imc_attestation_process_t imc_attestation_process + * @{ @ingroup imc_attestation + */ + +#ifndef IMC_ATTESTATION_PROCESS_H_ +#define IMC_ATTESTATION_PROCESS_H_ + +#include "imc_attestation_state.h" + +#include <library.h> + +#include <imc/imc_msg.h> +#include <pa_tnc/pa_tnc_attr.h> + +#include <pts/pts_dh_group.h> +#include <pts/pts_meas_algo.h> + +/** + * Process a TCG PTS attribute + * + * @param attr PA-TNC attribute to be processed + * @param msg outbound PA-TNC message to be assembled + * @param attestation_state attestation state of a given connection + * @param supported_algorithms supported PTS measurement algorithms + * @param supported_dh_groups supported DH groups + * @return TRUE if successful + */ +bool imc_attestation_process(pa_tnc_attr_t *attr, imc_msg_t *msg, + imc_attestation_state_t *attestation_state, + pts_meas_algorithms_t supported_algorithms, + pts_dh_group_t supported_dh_groups); + +#endif /** IMC_ATTESTATION_PROCESS_H_ @}*/ diff --git a/src/libimcv/plugins/imc_attestation/imc_attestation_state.c b/src/libimcv/plugins/imc_attestation/imc_attestation_state.c new file mode 100644 index 000000000..0b594cb10 --- /dev/null +++ b/src/libimcv/plugins/imc_attestation/imc_attestation_state.c @@ -0,0 +1,260 @@ +/* + * Copyright (C) 2011-2012 Sansar Choinyambuu + * Copyright (C) 2011-2014 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 "imc_attestation_state.h" + +#include <imcv.h> + +#include <tncif_names.h> + +#include <collections/linked_list.h> +#include <utils/debug.h> + +typedef struct private_imc_attestation_state_t private_imc_attestation_state_t; +typedef struct func_comp_t func_comp_t; + +/** + * Private data of an imc_attestation_state_t object. + */ +struct private_imc_attestation_state_t { + + /** + * Public members of imc_attestation_state_t + */ + imc_attestation_state_t public; + + /** + * TNCCS connection ID + */ + TNC_ConnectionID connection_id; + + /** + * TNCCS connection state + */ + TNC_ConnectionState state; + + /** + * Assessment/Evaluation Result + */ + TNC_IMV_Evaluation_Result result; + + /** + * 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 + */ + u_int32_t max_msg_len; + + /** + * PA-TNC attribute segmentation contracts associated with TNCCS connection + */ + seg_contract_manager_t *contracts; + + /** + * PTS object + */ + pts_t *pts; + + /** + * List of Functional Components + */ + linked_list_t *components; + + /** + * Functional Component Evidence cache list + */ + linked_list_t *list; + +}; + +METHOD(imc_state_t, get_connection_id, TNC_ConnectionID, + private_imc_attestation_state_t *this) +{ + return this->connection_id; +} + +METHOD(imc_state_t, has_long, bool, + private_imc_attestation_state_t *this) +{ + return this->has_long; +} + +METHOD(imc_state_t, has_excl, bool, + private_imc_attestation_state_t *this) +{ + return this->has_excl; +} + +METHOD(imc_state_t, set_flags, void, + private_imc_attestation_state_t *this, bool has_long, bool has_excl) +{ + this->has_long = has_long; + this->has_excl = has_excl; +} + +METHOD(imc_state_t, set_max_msg_len, void, + private_imc_attestation_state_t *this, u_int32_t max_msg_len) +{ + this->max_msg_len = max_msg_len; +} + +METHOD(imc_state_t, get_max_msg_len, u_int32_t, + private_imc_attestation_state_t *this) +{ + return this->max_msg_len; +} + +METHOD(imc_state_t, get_contracts, seg_contract_manager_t*, + private_imc_attestation_state_t *this) +{ + return this->contracts; +} + +METHOD(imc_state_t, change_state, void, + private_imc_attestation_state_t *this, TNC_ConnectionState new_state) +{ + this->state = new_state; +} + +METHOD(imc_state_t, set_result, void, + private_imc_attestation_state_t *this, TNC_IMCID id, + TNC_IMV_Evaluation_Result result) +{ + this->result = result; +} + +METHOD(imc_state_t, get_result, bool, + private_imc_attestation_state_t *this, TNC_IMCID id, + TNC_IMV_Evaluation_Result *result) +{ + if (result) + { + *result = this->result; + } + return this->result != TNC_IMV_EVALUATION_RESULT_DONT_KNOW; +} + +METHOD(imc_state_t, destroy, void, + private_imc_attestation_state_t *this) +{ + this->pts->destroy(this->pts); + this->components->destroy_offset(this->components, + offsetof(pts_component_t, destroy)); + this->list->destroy_offset(this->list, + offsetof(pts_comp_evidence_t, destroy)); + this->contracts->destroy(this->contracts); + free(this); +} + +METHOD(imc_attestation_state_t, get_pts, pts_t*, + private_imc_attestation_state_t *this) +{ + return this->pts; +} + +METHOD(imc_attestation_state_t, create_component, pts_component_t*, + private_imc_attestation_state_t *this, pts_comp_func_name_t *name, + u_int32_t depth) +{ + enumerator_t *enumerator; + pts_component_t *component; + bool found = FALSE; + + enumerator = this->components->create_enumerator(this->components); + while (enumerator->enumerate(enumerator, &component)) + { + if (name->equals(name, component->get_comp_func_name(component))) + { + found = TRUE; + break; + } + } + enumerator->destroy(enumerator); + + if (!found) + { + component = imcv_pts_components->create(imcv_pts_components, + name, depth, NULL); + if (!component) + { + return NULL; + } + this->components->insert_last(this->components, component); + + } + return component; +} + +METHOD(imc_attestation_state_t, add_evidence, void, + private_imc_attestation_state_t *this, pts_comp_evidence_t *evid) +{ + this->list->insert_last(this->list, evid); +} + +METHOD(imc_attestation_state_t, next_evidence, bool, + private_imc_attestation_state_t *this, pts_comp_evidence_t **evid) +{ + return this->list->remove_first(this->list, (void**)evid) == SUCCESS; +} + +/** + * Described in header. + */ +imc_state_t *imc_attestation_state_create(TNC_ConnectionID connection_id) +{ + private_imc_attestation_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, + .get_contracts = _get_contracts, + .change_state = _change_state, + .set_result = _set_result, + .get_result = _get_result, + .destroy = _destroy, + }, + .get_pts = _get_pts, + .create_component = _create_component, + .add_evidence = _add_evidence, + .next_evidence = _next_evidence, + }, + .connection_id = connection_id, + .state = TNC_CONNECTION_STATE_CREATE, + .result = TNC_IMV_EVALUATION_RESULT_DONT_KNOW, + .contracts = seg_contract_manager_create(), + .pts = pts_create(TRUE), + .components = linked_list_create(), + .list = linked_list_create(), + ); + + return &this->public.interface; +} + + diff --git a/src/libimcv/plugins/imc_attestation/imc_attestation_state.h b/src/libimcv/plugins/imc_attestation/imc_attestation_state.h new file mode 100644 index 000000000..854c8825b --- /dev/null +++ b/src/libimcv/plugins/imc_attestation/imc_attestation_state.h @@ -0,0 +1,86 @@ +/* + * Copyright (C) 2011 Sansar Choinyambuu + * 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 imc_attestation imc_attestation + * @ingroup libimcv_plugins + * + * @defgroup imc_attestation_state_t imc_attestation_state + * @{ @ingroup imc_attestation + */ + +#ifndef IMC_ATTESTATION_STATE_H_ +#define IMC_ATTESTATION_STATE_H_ + +#include <imc/imc_state.h> +#include <pts/pts.h> +#include <pts/components/pts_component.h> +#include <pts/components/pts_comp_evidence.h> +#include <library.h> + +typedef struct imc_attestation_state_t imc_attestation_state_t; + +/** + * Internal state of an imc_attestation_t connection instance + */ +struct imc_attestation_state_t { + + /** + * imc_state_t interface + */ + imc_state_t interface; + + /** + * Get the PTS object + * + * @return PTS object + */ + pts_t* (*get_pts)(imc_attestation_state_t *this); + + /** + * Create and add an entry to the list of Functional Components + * + * @param name Component Functional Name + * @param depth Sub-component Depth + * @return created functional component instance or NULL + */ + pts_component_t* (*create_component)(imc_attestation_state_t *this, + pts_comp_func_name_t *name, u_int32_t depth); + + /** + * Add an entry to the Component Evidence cache list + * + * @param evid Component Evidence entry + */ + void (*add_evidence)(imc_attestation_state_t *this, pts_comp_evidence_t *evid); + + /** + * Removes next entry from the Component Evidence cache list and returns it + * + * @param evid Next Component Evidence entry + * @return TRUE if next entry is available + */ + bool (*next_evidence)(imc_attestation_state_t *this, pts_comp_evidence_t** evid); + +}; + +/** + * Create an imc_attestation_state_t instance + * + * @param id connection ID + */ +imc_state_t* imc_attestation_state_create(TNC_ConnectionID id); + +#endif /** IMC_ATTESTATION_STATE_H_ @}*/ |