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-rw-r--r--src/libimcv/imv/imv_policy_manager.c359
1 files changed, 359 insertions, 0 deletions
diff --git a/src/libimcv/imv/imv_policy_manager.c b/src/libimcv/imv/imv_policy_manager.c
new file mode 100644
index 000000000..61e0cd05b
--- /dev/null
+++ b/src/libimcv/imv/imv_policy_manager.c
@@ -0,0 +1,359 @@
+/*
+ * Copyright (C) 2013 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_policy_manager_usage.h"
+#include "imv_workitem.h"
+
+#include <library.h>
+#include <utils/debug.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+
+/* The default policy group #1 is assumed to always exist */
+#define DEFAULT_GROUP_ID 1
+
+/**
+ * global debug output variables
+ */
+static int debug_level = 1;
+static bool stderr_quiet = FALSE;
+
+/**
+ * attest dbg function
+ */
+static void stderr_dbg(debug_t group, level_t level, char *fmt, ...)
+{
+ va_list args;
+
+ if (level <= debug_level)
+ {
+ if (!stderr_quiet)
+ {
+ va_start(args, fmt);
+ vfprintf(stderr, fmt, args);
+ fprintf(stderr, "\n");
+ va_end(args);
+ }
+ }
+}
+
+/**
+ * Collect all enforcements by iterating up through parent groups
+ */
+static bool iterate_enforcements(database_t *db, int device_id, int session_id,
+ int group_id)
+{
+ int id, type, file, dir, arg_int, parent, policy, max_age;
+ int p_rec_fail, p_rec_noresult, e_rec_fail, e_rec_noresult, latest_rec;
+ bool latest_success;
+ char *argument;
+ time_t now;
+ enumerator_t *e, *e1, *e2;
+
+ now = time(NULL);
+
+ while (group_id)
+ {
+ e1 = db->query(db,
+ "SELECT e.id, p.type, p.argument, p.file, p.dir, p.rec_fail, "
+ "p.rec_noresult, e.policy, e.max_age, e.rec_fail, e.rec_noresult "
+ "FROM enforcements AS e JOIN policies as p ON e.policy = p.id "
+ "WHERE e.group_id = ?", DB_INT, group_id,
+ DB_INT, DB_INT, DB_TEXT, DB_INT, DB_INT, DB_INT, DB_INT,
+ DB_INT, DB_INT, DB_INT, DB_INT);
+ if (!e1)
+ {
+ return FALSE;
+ }
+ while (e1->enumerate(e1, &id, &type, &argument, &file, &dir,
+ &p_rec_fail, &p_rec_noresult, &policy, &max_age,
+ &e_rec_fail, &e_rec_noresult))
+ {
+ /* check if the latest measurement of the device was successful */
+ latest_success = FALSE;
+
+ if (device_id)
+ {
+ e2 = db->query(db,
+ "SELECT r.rec FROM results AS r "
+ "JOIN sessions AS s ON s.id = r.session "
+ "WHERE r.policy = ? AND s.device = ? AND s.time > ? "
+ "ORDER BY s.time DESC",
+ DB_INT, policy, DB_INT, device_id,
+ DB_UINT, now - max_age, DB_INT);
+ if (!e2)
+ {
+ e1->destroy(e1);
+ return FALSE;
+ }
+ if (e2->enumerate(e2, &latest_rec) &&
+ latest_rec == TNC_IMV_ACTION_RECOMMENDATION_ALLOW)
+ {
+ latest_success = TRUE;
+ }
+ e2->destroy(e2);
+ }
+
+ if (latest_success)
+ {
+ /*skipping enforcement */
+ printf("skipping enforcment %d\n", id);
+ continue;
+ }
+
+ /* determine arg_int */
+ switch ((imv_workitem_type_t)type)
+ {
+ case IMV_WORKITEM_FILE_REF_MEAS:
+ case IMV_WORKITEM_FILE_MEAS:
+ case IMV_WORKITEM_FILE_META:
+ arg_int = file;
+ break;
+ case IMV_WORKITEM_DIR_REF_MEAS:
+ case IMV_WORKITEM_DIR_MEAS:
+ case IMV_WORKITEM_DIR_META:
+ arg_int = dir;
+ break;
+ default:
+ arg_int = 0;
+ }
+
+ /* insert a workitem */
+ if (db->execute(db, NULL,
+ "INSERT INTO workitems (session, enforcement, type, arg_str, "
+ "arg_int, rec_fail, rec_noresult) VALUES (?, ?, ?, ?, ?, ?, ?)",
+ DB_INT, session_id, DB_INT, id, DB_INT, type, DB_TEXT, argument,
+ DB_INT, arg_int, DB_INT, e_rec_fail ? e_rec_fail : p_rec_fail,
+ DB_INT, e_rec_noresult ? e_rec_noresult : p_rec_noresult) != 1)
+ {
+ e1->destroy(e1);
+ fprintf(stderr, "could not insert workitem\n");
+ return FALSE;
+ }
+ }
+ e1->destroy(e1);
+
+ e = db->query(db,
+ "SELECT parent FROM groups WHERE id = ?",
+ DB_INT, group_id, DB_INT);
+ if (!e)
+ {
+ return FALSE;
+ }
+ if (e->enumerate(e, &parent))
+ {
+ group_id = parent;
+ }
+ else
+ {
+ fprintf(stderr, "group information not found\n");
+ group_id = 0;
+ }
+ e->destroy(e);
+ }
+ return TRUE;
+}
+
+static bool policy_start(database_t *db, int session_id)
+{
+ enumerator_t *e;
+ int device_id, product_id, gid, group_id = DEFAULT_GROUP_ID;
+ u_int created;
+
+ /* get session data */
+ e = db->query(db,
+ "SELECT s.device, s.product, d.created FROM sessions AS s "
+ "LEFT JOIN devices AS d ON s.device = d.id WHERE s.id = ?",
+ DB_INT, session_id, DB_INT, DB_INT, DB_UINT);
+ if (!e || !e->enumerate(e, &device_id, &product_id, &created))
+ {
+ DESTROY_IF(e);
+ fprintf(stderr, "session %d not found\n", session_id);
+ return FALSE;
+ }
+ e->destroy(e);
+
+ /* if a device ID with a creation date exists, get all group memberships */
+ if (device_id & created)
+ {
+ e = db->query(db,
+ "SELECT group_id FROM groups_members WHERE device_id = ?",
+ DB_INT, device_id, DB_INT);
+ if (!e)
+ {
+ return FALSE;
+ }
+ while (e->enumerate(e, &group_id))
+ {
+ if (!iterate_enforcements(db, device_id, session_id, group_id))
+ {
+ e->destroy(e);
+ return FALSE;
+ }
+ }
+ e->destroy(e);
+
+ return TRUE;
+ }
+
+ /* determine if a default product group exists */
+ e = db->query(db,
+ "SELECT group_id FROM groups_product_defaults "
+ "WHERE product_id = ?", DB_INT, product_id, DB_INT);
+ if (!e)
+ {
+ return FALSE;
+ }
+ if (e->enumerate(e, &gid))
+ {
+ group_id = gid;
+ }
+ e->destroy(e);
+
+ if (device_id && !created)
+ {
+ /* assign a newly created device to a default group */
+ if (db->execute(db, NULL,
+ "INSERT INTO groups_members (device_id, group_id) "
+ "VALUES (?, ?)", DB_INT, device_id, DB_INT, group_id) != 1)
+ {
+ fprintf(stderr, "could not assign device to a default group\n");
+ return FALSE;
+ }
+
+ /* set the creation date if it hasn't been set yet */
+ if (db->execute(db, NULL,
+ "UPDATE devices SET created = ? WHERE id = ?",
+ DB_UINT, time(NULL), DB_INT, device_id) != 1)
+ {
+ fprintf(stderr, "creation date of device could not be set\n");
+ return FALSE;
+ }
+ }
+
+ return iterate_enforcements(db, device_id, session_id, group_id);
+}
+
+static bool policy_stop(database_t *db, int session_id)
+{
+ enumerator_t *e;
+ int rec, policy;
+ char *result;
+
+ e = db->query(db,
+ "SELECT w.rec_final, w.result, e.policy FROM workitems AS w "
+ "JOIN enforcements AS e ON w.enforcement = e.id "
+ "WHERE w.session = ? AND w.result IS NOT NULL",
+ DB_INT, session_id, DB_INT, DB_TEXT, DB_INT);
+ if (e)
+ {
+ while (e->enumerate(e, &rec, &result, &policy))
+ {
+ db->execute(db, NULL,
+ "INSERT INTO results (session, policy, rec, result) "
+ "VALUES (?, ?, ?, ?)", DB_INT, session_id, DB_INT, policy,
+ DB_INT, rec, DB_TEXT, result);
+ }
+ e->destroy(e);
+ }
+ return db->execute(db, NULL,
+ "DELETE FROM workitems WHERE session = ?",
+ DB_UINT, session_id) >= 0;
+}
+
+int main(int argc, char *argv[])
+{
+ database_t *db;
+ char *uri, *tnc_session_id;
+ int session_id;
+ bool start, success;
+
+ /* enable attest debugging hook */
+ dbg = stderr_dbg;
+
+ atexit(library_deinit);
+
+ /* initialize library */
+ if (!library_init(NULL))
+ {
+ exit(SS_RC_LIBSTRONGSWAN_INTEGRITY);
+ }
+ if (!lib->plugins->load(lib->plugins,
+ lib->settings->get_str(lib->settings, "imv_policy_manager.load",
+ "sqlite")))
+ {
+ exit(SS_RC_INITIALIZATION_FAILED);
+ }
+
+ if (argc < 2)
+ {
+ usage();
+ exit(SS_RC_INITIALIZATION_FAILED);
+ }
+ if (streq(argv[1], "start"))
+ {
+ start = TRUE;
+ }
+ else if (streq(argv[1], "stop"))
+ {
+ start = FALSE;
+ }
+ else
+ {
+ usage();
+ exit(SS_RC_INITIALIZATION_FAILED);
+ }
+
+ /* get session ID */
+ tnc_session_id = getenv("TNC_SESSION_ID");
+ if (!tnc_session_id)
+ {
+ fprintf(stderr, "environment variable TNC_SESSION_ID is not defined\n");
+ exit(SS_RC_INITIALIZATION_FAILED);
+ }
+ session_id = atoi(tnc_session_id);
+
+ /* attach IMV database */
+ uri = lib->settings->get_str(lib->settings, "libimcv.database", NULL);
+ if (!uri)
+ {
+ fprintf(stderr, "database uri not defined.\n");
+ exit(SS_RC_INITIALIZATION_FAILED);
+ }
+
+ db = lib->db->create(lib->db, uri);
+ if (!db)
+ {
+ fprintf(stderr, "opening database failed.\n");
+ exit(SS_RC_INITIALIZATION_FAILED);
+ }
+
+ if (start)
+ {
+ success = policy_start(db, session_id);
+ }
+ else
+ {
+ success = policy_stop(db, session_id);
+ }
+ db->destroy(db);
+
+ fprintf(stderr, "imv_policy_manager %s %s\n", start ? "start" : "stop",
+ success ? "successful" : "failed");
+
+ exit(EXIT_SUCCESS);
+}
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