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Diffstat (limited to 'src/libimcv/plugins/imc_os/imc_os.c')
-rw-r--r--src/libimcv/plugins/imc_os/imc_os.c628
1 files changed, 628 insertions, 0 deletions
diff --git a/src/libimcv/plugins/imc_os/imc_os.c b/src/libimcv/plugins/imc_os/imc_os.c
new file mode 100644
index 000000000..2558be9f8
--- /dev/null
+++ b/src/libimcv/plugins/imc_os/imc_os.c
@@ -0,0 +1,628 @@
+/*
+ * Copyright (C) 2011-2012 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_os_state.h"
+
+#include <imc/imc_agent.h>
+#include <imc/imc_msg.h>
+#include <ietf/ietf_attr.h>
+#include <ietf/ietf_attr_attr_request.h>
+#include <ietf/ietf_attr_default_pwd_enabled.h>
+#include <ietf/ietf_attr_fwd_enabled.h>
+#include <ietf/ietf_attr_installed_packages.h>
+#include <ietf/ietf_attr_numeric_version.h>
+#include <ietf/ietf_attr_op_status.h>
+#include <ietf/ietf_attr_product_info.h>
+#include <ietf/ietf_attr_string_version.h>
+#include <ita/ita_attr.h>
+#include <ita/ita_attr_get_settings.h>
+#include <ita/ita_attr_settings.h>
+#include <ita/ita_attr_angel.h>
+#include <ita/ita_attr_device_id.h>
+#include <os_info/os_info.h>
+
+#include <tncif_pa_subtypes.h>
+
+#include <pen/pen.h>
+#include <utils/debug.h>
+
+/* IMC definitions */
+
+static const char imc_name[] = "OS";
+
+static pen_type_t msg_types[] = {
+ { PEN_IETF, PA_SUBTYPE_IETF_OPERATING_SYSTEM }
+};
+
+static imc_agent_t *imc_os;
+static os_info_t *os;
+
+/**
+ * see section 3.8.1 of TCG TNC IF-IMC Specification 1.3
+ */
+TNC_Result TNC_IMC_Initialize(TNC_IMCID imc_id,
+ TNC_Version min_version,
+ TNC_Version max_version,
+ TNC_Version *actual_version)
+{
+ if (imc_os)
+ {
+ DBG1(DBG_IMC, "IMC \"%s\" has already been initialized", imc_name);
+ return TNC_RESULT_ALREADY_INITIALIZED;
+ }
+ imc_os = imc_agent_create(imc_name, msg_types, countof(msg_types),
+ imc_id, actual_version);
+ if (!imc_os)
+ {
+ return TNC_RESULT_FATAL;
+ }
+
+ os = os_info_create();
+ if (!os)
+ {
+ imc_os->destroy(imc_os);
+ imc_os = 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_NotifyConnectionChange(TNC_IMCID imc_id,
+ TNC_ConnectionID connection_id,
+ TNC_ConnectionState new_state)
+{
+ imc_state_t *state;
+
+ if (!imc_os)
+ {
+ 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_os_state_create(connection_id);
+ return imc_os->create_state(imc_os, state);
+ case TNC_CONNECTION_STATE_HANDSHAKE:
+ if (imc_os->change_state(imc_os, 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_os->delete_state(imc_os, connection_id);
+ default:
+ return imc_os->change_state(imc_os, connection_id,
+ new_state, NULL);
+ }
+}
+
+/**
+ * Add IETF Product Information attribute to the send queue
+ */
+static void add_product_info(imc_msg_t *msg)
+{
+ pa_tnc_attr_t *attr;
+ os_type_t os_type;
+ pen_t vendor_id = PEN_IETF;
+ int i;
+
+ typedef struct vendor_pen_t {
+ os_type_t os_type;
+ pen_t pen;
+ } vendor_pen_t;
+
+ vendor_pen_t vendor_pens[] = {
+ { OS_TYPE_DEBIAN, PEN_DEBIAN },
+ { OS_TYPE_UBUNTU, PEN_CANONICAL },
+ { OS_TYPE_FEDORA, PEN_FEDORA },
+ { OS_TYPE_REDHAT, PEN_REDHAT },
+ { OS_TYPE_ANDROID, PEN_GOOGLE }
+ };
+
+ os_type = os->get_type(os);
+ for (i = 0; i < countof(vendor_pens); i++)
+ {
+ if (os_type == vendor_pens[i].os_type)
+ {
+ vendor_id = vendor_pens[i].pen;
+ break;
+ }
+ }
+ attr = ietf_attr_product_info_create(vendor_id, 0, os->get_name(os));
+ msg->add_attribute(msg, attr);
+}
+
+/**
+ * Add IETF Numeric Version attribute to the send queue
+ */
+static void add_numeric_version(imc_msg_t *msg)
+{
+ pa_tnc_attr_t *attr;
+ u_int32_t major, minor;
+
+ os->get_numeric_version(os, &major, &minor);
+ DBG1(DBG_IMC, "operating system numeric version is %d.%d",
+ major, minor);
+
+ attr = ietf_attr_numeric_version_create(major, minor, 0, 0, 0);
+ msg->add_attribute(msg, attr);
+}
+
+/**
+ * Add IETF String Version attribute to the send queue
+ */
+static void add_string_version(imc_msg_t *msg)
+{
+ pa_tnc_attr_t *attr;
+
+ attr = ietf_attr_string_version_create(os->get_version(os),
+ chunk_empty, chunk_empty);
+ msg->add_attribute(msg, attr);
+}
+
+/**
+ * Add IETF Operational Status attribute to the send queue
+ */
+static void add_op_status(imc_msg_t *msg)
+{
+ pa_tnc_attr_t *attr;
+ time_t uptime, last_boot;
+
+ uptime = os->get_uptime(os);
+ last_boot = uptime ? time(NULL) - uptime : UNDEFINED_TIME;
+ if (last_boot != UNDEFINED_TIME)
+ {
+ DBG1(DBG_IMC, "last boot: %T, %u s ago", &last_boot, TRUE, uptime);
+ }
+ attr = ietf_attr_op_status_create(OP_STATUS_OPERATIONAL,
+ OP_RESULT_SUCCESSFUL, last_boot);
+ msg->add_attribute(msg, attr);
+}
+
+/**
+ * Add IETF Forwarding Enabled attribute to the send queue
+ */
+static void add_fwd_enabled(imc_msg_t *msg)
+{
+ pa_tnc_attr_t *attr;
+ os_fwd_status_t fwd_status;
+
+ fwd_status = os->get_fwd_status(os);
+ DBG1(DBG_IMC, "IPv4 forwarding is %N",
+ os_fwd_status_names, fwd_status);
+ attr = ietf_attr_fwd_enabled_create(fwd_status);
+ msg->add_attribute(msg, attr);
+}
+
+/**
+ * Add IETF Factory Default Password Enabled attribute to the send queue
+ */
+static void add_default_pwd_enabled(imc_msg_t *msg)
+{
+ pa_tnc_attr_t *attr;
+
+ DBG1(DBG_IMC, "factory default password is disabled");
+ attr = ietf_attr_default_pwd_enabled_create(FALSE);
+ msg->add_attribute(msg, attr);
+}
+
+/**
+ * Add ITA Device ID attribute to the send queue
+ */
+static void add_device_id(imc_msg_t *msg)
+{
+ pa_tnc_attr_t *attr;
+ chunk_t value;
+ char *name;
+
+ name = os->get_type(os) == OS_TYPE_ANDROID ?
+ "android_id" : "/var/lib/dbus/machine-id";
+ value = os->get_setting(os, name);
+
+ if (value.len == 0)
+ {
+ DBG1(DBG_IMC, "no device ID available");
+ return;
+ }
+
+ /* trim trailing newline character */
+ if (value.ptr[value.len - 1] == '\n')
+ {
+ value.len--;
+ }
+
+ DBG1(DBG_IMC, "device ID is %.*s", value.len, value.ptr);
+ attr = ita_attr_device_id_create(value);
+ msg->add_attribute(msg, attr);
+ free(value.ptr);
+}
+
+/**
+ * Add an IETF Installed Packages attribute to the send queue
+ */
+static void add_installed_packages(imc_state_t *state, imc_msg_t *msg)
+{
+ pa_tnc_attr_t *attr = NULL, *attr_angel;
+ ietf_attr_installed_packages_t *attr_cast;
+ enumerator_t *enumerator;
+ chunk_t name, version;
+ size_t max_attr_size, attr_size, entry_size;
+ bool first = TRUE;
+
+ /**
+ * Compute the maximum IETF Installed Packages attribute size
+ * leaving space for an additional ITA Angel attribute
+ */
+ max_attr_size = state->get_max_msg_len(state) - 8 - 12;
+
+ /* At least one IETF Installed Packages attribute is sent */
+ attr = ietf_attr_installed_packages_create();
+ attr_size = 12 + 4;
+
+ enumerator = os->create_package_enumerator(os);
+ if (enumerator)
+ {
+ while (enumerator->enumerate(enumerator, &name, &version))
+ {
+ DBG2(DBG_IMC, "package '%.*s' (%.*s)",
+ name.len, name.ptr, version.len, version.ptr);
+
+ entry_size = 2 + name.len + version.len;
+ if (attr_size + entry_size > max_attr_size)
+ {
+ if (first)
+ {
+ /**
+ * Send an ITA Start Angel attribute to the IMV signalling
+ * that multiple ITA Installed Package attributes follow.
+ */
+ attr_angel = ita_attr_angel_create(TRUE);
+ msg->add_attribute(msg, attr_angel);
+ first = FALSE;
+ }
+ msg->add_attribute(msg, attr);
+
+ /* create the next IETF Installed Packages attribute */
+ attr = ietf_attr_installed_packages_create();
+ attr_size = 12 + 4;
+ }
+ attr_cast = (ietf_attr_installed_packages_t*)attr;
+ attr_cast->add(attr_cast, name, version);
+ attr_size += entry_size;
+ }
+ enumerator->destroy(enumerator);
+ }
+ msg->add_attribute(msg, attr);
+
+ if (!first)
+ {
+ /**
+ * If we sent an ITA Start Angel attribute in the first place,
+ * terminate by appending a matching ITA Stop Angel attribute.
+ */
+ attr_angel = ita_attr_angel_create(FALSE);
+ msg->add_attribute(msg, attr_angel);
+ }
+}
+
+/**
+ * Add ITA Settings attribute to the send queue
+ */
+static void add_settings(enumerator_t *enumerator, imc_msg_t *msg)
+{
+ pa_tnc_attr_t *attr = NULL;
+ ita_attr_settings_t *attr_cast;
+ chunk_t value;
+ char *name;
+ bool first = TRUE;
+
+ while (enumerator->enumerate(enumerator, &name))
+ {
+ DBG1(DBG_IMC, "setting '%s'", name);
+
+ value = os->get_setting(os, name);
+ if (!value.ptr)
+ {
+ continue;
+ }
+ if (first)
+ {
+ attr = ita_attr_settings_create();
+ first = FALSE;
+ }
+ attr_cast = (ita_attr_settings_t*)attr;
+ attr_cast->add(attr_cast, name, value);
+ chunk_free(&value);
+ }
+
+ if (attr)
+ {
+ msg->add_attribute(msg, attr);
+ }
+}
+
+/**
+ * see section 3.8.3 of TCG TNC IF-IMC Specification 1.3
+ */
+TNC_Result TNC_IMC_BeginHandshake(TNC_IMCID imc_id,
+ TNC_ConnectionID connection_id)
+{
+ imc_state_t *state;
+ imc_msg_t *out_msg;
+ TNC_Result result = TNC_RESULT_SUCCESS;
+
+ if (!imc_os)
+ {
+ DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+ return TNC_RESULT_NOT_INITIALIZED;
+ }
+ if (!imc_os->get_state(imc_os, connection_id, &state))
+ {
+ return TNC_RESULT_FATAL;
+ }
+ if (lib->settings->get_bool(lib->settings,
+ "libimcv.plugins.imc-os.push_info", TRUE))
+ {
+ out_msg = imc_msg_create(imc_os, state, connection_id, imc_id,
+ TNC_IMVID_ANY, msg_types[0]);
+ add_product_info(out_msg);
+ add_string_version(out_msg);
+ add_numeric_version(out_msg);
+ add_op_status(out_msg);
+ add_fwd_enabled(out_msg);
+ add_default_pwd_enabled(out_msg);
+ add_device_id(out_msg);
+
+ /* send PA-TNC message with the excl flag not set */
+ result = out_msg->send(out_msg, FALSE);
+ out_msg->destroy(out_msg);
+ }
+
+ return result;
+}
+
+static TNC_Result receive_message(imc_state_t *state, imc_msg_t *in_msg)
+{
+ imc_msg_t *out_msg;
+ enumerator_t *enumerator;
+ pa_tnc_attr_t *attr;
+ pen_type_t type;
+ TNC_Result result;
+ bool fatal_error = FALSE;
+
+ /* parse received PA-TNC message and handle local and remote errors */
+ result = in_msg->receive(in_msg, &fatal_error);
+ if (result != TNC_RESULT_SUCCESS)
+ {
+ return result;
+ }
+ out_msg = imc_msg_create_as_reply(in_msg);
+
+ /* 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_ATTRIBUTE_REQUEST)
+ {
+ ietf_attr_attr_request_t *attr_cast;
+ pen_type_t *entry;
+ enumerator_t *e;
+
+ attr_cast = (ietf_attr_attr_request_t*)attr;
+
+ e = attr_cast->create_enumerator(attr_cast);
+ while (e->enumerate(e, &entry))
+ {
+ if (entry->vendor_id == PEN_IETF)
+ {
+ switch (entry->type)
+ {
+ case IETF_ATTR_PRODUCT_INFORMATION:
+ add_product_info(out_msg);
+ break;
+ case IETF_ATTR_STRING_VERSION:
+ add_string_version(out_msg);
+ break;
+ case IETF_ATTR_NUMERIC_VERSION:
+ add_numeric_version(out_msg);
+ break;
+ case IETF_ATTR_OPERATIONAL_STATUS:
+ add_op_status(out_msg);
+ break;
+ case IETF_ATTR_FORWARDING_ENABLED:
+ add_fwd_enabled(out_msg);
+ break;
+ case IETF_ATTR_FACTORY_DEFAULT_PWD_ENABLED:
+ add_default_pwd_enabled(out_msg);
+ break;
+ case IETF_ATTR_INSTALLED_PACKAGES:
+ add_installed_packages(state, out_msg);
+ break;
+ default:
+ break;
+ }
+ }
+ else if (entry->vendor_id == PEN_ITA)
+ {
+ switch (entry->type)
+ {
+ case ITA_ATTR_DEVICE_ID:
+ add_device_id(out_msg);
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ e->destroy(e);
+ }
+ }
+ else if (type.vendor_id == PEN_ITA && type.type == ITA_ATTR_GET_SETTINGS)
+ {
+ ita_attr_get_settings_t *attr_cast;
+ enumerator_t *e;
+
+ attr_cast = (ita_attr_get_settings_t*)attr;
+
+ e = attr_cast->create_enumerator(attr_cast);
+ add_settings(e, out_msg);
+ e->destroy(e);
+ }
+ }
+ enumerator->destroy(enumerator);
+
+ if (fatal_error)
+ {
+ result = TNC_RESULT_FATAL;
+ }
+ else
+ {
+ 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_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_os)
+ {
+ DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+ return TNC_RESULT_NOT_INITIALIZED;
+ }
+ if (!imc_os->get_state(imc_os, connection_id, &state))
+ {
+ return TNC_RESULT_FATAL;
+ }
+ in_msg = imc_msg_create_from_data(imc_os, 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_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_os)
+ {
+ DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+ return TNC_RESULT_NOT_INITIALIZED;
+ }
+ if (!imc_os->get_state(imc_os, connection_id, &state))
+ {
+ return TNC_RESULT_FATAL;
+ }
+ in_msg = imc_msg_create_from_long_data(imc_os, 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_BatchEnding(TNC_IMCID imc_id,
+ TNC_ConnectionID connection_id)
+{
+ if (!imc_os)
+ {
+ 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_Terminate(TNC_IMCID imc_id)
+{
+ if (!imc_os)
+ {
+ DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+ return TNC_RESULT_NOT_INITIALIZED;
+ }
+ imc_os->destroy(imc_os);
+ imc_os = NULL;
+
+ os->destroy(os);
+ os = NULL;
+
+ return TNC_RESULT_SUCCESS;
+}
+
+/**
+ * see section 4.2.8.1 of TCG TNC IF-IMC Specification 1.3
+ */
+TNC_Result TNC_IMC_ProvideBindFunction(TNC_IMCID imc_id,
+ TNC_TNCC_BindFunctionPointer bind_function)
+{
+ if (!imc_os)
+ {
+ DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+ return TNC_RESULT_NOT_INITIALIZED;
+ }
+ return imc_os->bind_functions(imc_os, bind_function);
+}
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