1 files changed, 313 insertions, 0 deletions
diff --git a/src/libimcv/plugins/imc_swima/sw_collector/sw_collector_db.c b/src/libimcv/plugins/imc_swima/sw_collector/sw_collector_db.c
new file mode 100644
index 000000000..e3c8b008e
--- /dev/null
+++ b/src/libimcv/plugins/imc_swima/sw_collector/sw_collector_db.c
@@ -0,0 +1,313 @@
+/*
+ * 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 "sw_collector_db.h"
+
+#include "swima/swima_event.h"
+
+typedef struct private_sw_collector_db_t private_sw_collector_db_t;
+
+/**
+ * Private data of an sw_collector_db_t object.
+ */
+struct private_sw_collector_db_t {
+
+	/**
+	 * Public members of sw_collector_db_state_t
+	 */
+	sw_collector_db_t public;
+
+	/**
+	 * Epoch
+	 */
+	uint32_t epoch;
+
+	/**
+	 * Event ID of last event stored in database
+	 */
+	uint32_t last_eid;
+
+	/**
+	 * Software collector database
+	 */
+	database_t *db;
+
+};
+
+METHOD(sw_collector_db_t, add_event, uint32_t,
+	private_sw_collector_db_t *this, char *timestamp)
+{
+	uint32_t eid = 0;
+
+	if (this->db->execute(this->db, &eid,
+			"INSERT INTO events (epoch, timestamp) VALUES (?, ?)",
+			 DB_UINT, this->epoch, DB_TEXT, timestamp) != 1)
+	{
+		DBG1(DBG_IMC, "unable to insert event into database");
+		return 0;
+	}
+
+	return eid;
+}
+
+METHOD(sw_collector_db_t, get_last_event, bool,
+	private_sw_collector_db_t *this, uint32_t *eid, uint32_t *epoch,
+	char **last_time)
+{
+	char *timestamp;
+	enumerator_t *e;
+
+	e = this->db->query(this->db,
+			"SELECT id, epoch, timestamp FROM events ORDER BY timestamp DESC",
+			DB_UINT, DB_UINT, DB_TEXT);
+	if (!e)
+	{
+		DBG1(DBG_IMC, "database query for event failed");
+		return FALSE;
+	}
+	if (e->enumerate(e, eid, epoch, &timestamp))
+	{
+		if (last_time)
+		{
+			*last_time = strdup(timestamp);
+		}
+	}
+	else
+	{
+		*eid = 0;
+	}
+	e->destroy(e);
+
+	return TRUE;
+}
+
+METHOD(sw_collector_db_t, add_sw_event, bool,
+	private_sw_collector_db_t *this, uint32_t eid, uint32_t sw_id,
+	uint8_t action)
+{
+	if (this->db->execute(this->db, NULL,
+			"INSERT INTO sw_events (eid, sw_id, action) VALUES (?, ?, ?)",
+			 DB_UINT, eid, DB_UINT, sw_id, DB_UINT, action) != 1)
+	{
+		DBG1(DBG_IMC, "unable to insert sw_event into database");
+		return FALSE;
+	}
+
+	return TRUE;
+}
+
+METHOD(sw_collector_db_t, get_sw_id, uint32_t,
+	private_sw_collector_db_t *this, char *package, char *version, char *name,
+	uint8_t source, bool installed, bool check)
+{
+	uint32_t sw_id = 0, status;
+	enumerator_t *e;
+
+	/* Does software identifier already exist in database? */
+	e = this->db->query(this->db,
+			"SELECT id, installed FROM sw_identifiers WHERE name = ?",
+			DB_TEXT, name, DB_UINT, DB_UINT);
+	if (!e)
+	{
+		DBG1(DBG_IMC, "database query for sw_identifier failed");
+		return 0;
+	}
+	if (!e->enumerate(e, &sw_id, &status))
+	{
+		sw_id = 0;
+	}
+	e->destroy(e);
+
+	if (sw_id)
+	{
+		if (status == installed)
+		{
+			if (!check)
+			{
+				DBG1(DBG_IMC, "  Warning: sw_id %u is already %s", sw_id,
+					 status ? "installed" : "deleted");
+			}
+			return sw_id;
+		}
+		if (check)
+		{
+			DBG1(DBG_IMC, "  Warning: sw_id %u is %s", sw_id,
+				 status ? "installed" : "deleted");
+		}
+
+		/* Change installation status */
+		if (this->db->execute(this->db, NULL,
+				"UPDATE sw_identifiers SET installed = ? WHERE id = ?",
+				 DB_UINT, installed, DB_UINT, sw_id) != 1)
+		{
+			DBG1(DBG_IMC, "unable to update sw_id status in database");
+			return 0;
+		}
+	}
+	else
+	{
+		/* Create new software identifier */
+		if (this->db->execute(this->db, &sw_id,
+				"INSERT INTO sw_identifiers "
+				"(name, package, version, source, installed) VALUES "
+				"(?, ?, ?, ?, ?)",
+				 DB_TEXT, name, DB_TEXT, package, DB_TEXT, version,
+				 DB_UINT, source, DB_UINT, installed) != 1)
+		{
+			DBG1(DBG_IMC, "unable to insert sw_id into database");
+			return 0;
+		}
+
+		if (check || !installed)
+		{
+			add_sw_event(this, 1, sw_id, SWIMA_EVENT_ACTION_CREATION);
+		}
+	}
+
+	return sw_id;
+}
+
+METHOD(sw_collector_db_t, get_sw_id_count, uint32_t,
+	private_sw_collector_db_t *this, bool installed_only)
+{
+	uint32_t count;
+	enumerator_t *e;
+
+	if (installed_only)
+	{
+		e = this->db->query(this->db,
+			"SELECT COUNT(installed) FROM sw_identifiers WHERE installed = 1 ",
+			 DB_UINT);
+	}
+	else
+	{
+		e = this->db->query(this->db,
+			"SELECT COUNT(installed) FROM sw_identifiers", DB_UINT);
+	}
+
+	if (!e)
+	{
+		DBG1(DBG_IMC, "database query for sw_identifier count failed");
+		return 0;
+	}
+	if (!e->enumerate(e, &count))
+	{
+		count = 0;
+	}
+	e->destroy(e);
+
+	return count;
+}
+
+METHOD(sw_collector_db_t, create_sw_enumerator, enumerator_t*,
+	private_sw_collector_db_t *this, bool installed_only)
+{
+	enumerator_t *e;
+
+	if (installed_only)
+	{
+		e = this->db->query(this->db,
+				"SELECT name, package, version, installed FROM sw_identifiers "
+				"WHERE installed = 1 ORDER BY name ASC",
+				 DB_TEXT, DB_TEXT, DB_TEXT, DB_UINT);
+	}
+	else
+	{
+		e = this->db->query(this->db,
+				"SELECT name, package, version, installed FROM sw_identifiers "
+				"ORDER BY name ASC", DB_TEXT, DB_TEXT, DB_TEXT, DB_UINT);
+	}
+	if (!e)
+	{
+		DBG1(DBG_IMC, "database query for sw_identifier count failed");
+		return NULL;
+	}
+
+	return e;
+}
+
+METHOD(sw_collector_db_t, destroy, void,
+	private_sw_collector_db_t *this)
+{
+	this->db->destroy(this->db);
+	free(this);
+}
+
+/**
+ * Described in header.
+ */
+sw_collector_db_t *sw_collector_db_create(char *uri)
+{
+	private_sw_collector_db_t *this;
+	uint32_t first_eid, last_eid;
+	char *first_time;
+
+	INIT(this,
+		.public = {
+			.add_event = _add_event,
+			.get_last_event = _get_last_event,
+			.add_sw_event = _add_sw_event,
+			.get_sw_id = _get_sw_id,
+			.get_sw_id_count = _get_sw_id_count,
+			.create_sw_enumerator = _create_sw_enumerator,
+			.destroy = _destroy,
+		},
+		.db = lib->db->create(lib->db, uri),
+	);
+
+	if (!this->db)
+	{
+		DBG1(DBG_IMC, "opening database URI '%s' failed", uri);
+		return NULL;
+	}
+
+	/* Retrieve last event in database */
+	if (!get_last_event(this, &last_eid, &this->epoch, NULL))
+	{
+		destroy(this);
+		return NULL;
+	}
+
+	/* Create random epoch and first event if no events exist yet */
+	if (!last_eid)
+	{
+		rng_t *rng;
+
+		rng = lib->crypto->create_rng(lib->crypto, RNG_STRONG);
+		if (!rng ||
+			!rng->get_bytes(rng, sizeof(uint32_t), (uint8_t*)&this->epoch))
+		{
+			DESTROY_IF(rng);
+			destroy(this);
+			DBG1(DBG_IMC, "generating random epoch value failed");
+			return NULL;
+		}
+		rng->destroy(rng);
+
+		/* Create first event when the OS was installed */
+		first_time = lib->settings->get_str(lib->settings,
+						"sw-collector.first_time", "0000-00-00T00:00:00Z");
+		first_eid = add_event(this, first_time);
+		if (!first_eid)
+		{
+			destroy(this);
+			return NULL;
+		}
+		DBG0(DBG_IMC, "First-Date: %s, eid = %u, epoch = %u",
+					   first_time, first_eid, this->epoch);
+	}
+
+	return &this->public;
+}