Merged libpts into libimcv

src/libimcv/pts/components/pts_comp_evidence.c

@@ -0,0 +1,255 @@
+/*
+ * Copyright (C) 2011 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.
+ */
+
+#include "pts/components/pts_comp_evidence.h"
+
+#include <utils/debug.h>
+
+typedef struct private_pts_comp_evidence_t private_pts_comp_evidence_t;
+
+/**
+ * Private data of a pts_comp_evidence_t object.
+ */
+struct private_pts_comp_evidence_t {
+
+	/**
+	 * Public pts_comp_evidence_t interface.
+	 */
+	pts_comp_evidence_t public;
+
+	/**
+	 * Component Functional Name
+	 */
+	pts_comp_func_name_t *name;
+
+	/**
+	 * Sub-Component Depth
+	 */
+	u_int32_t depth;
+
+	/**
+	 * Measurement Time
+	 */
+	time_t measurement_time;
+
+	/**
+	 * Measurement Time
+	 */
+	chunk_t measurement;
+
+	/**
+	 * Measurement Hash Algorithm
+	 */
+	pts_meas_algorithms_t hash_algorithm;
+
+	/**
+	 * Is PCR Information included?
+	 */
+	bool has_pcr_info;
+
+	/**
+	 * PCR the measurement was extended into
+	 */
+	u_int32_t extended_pcr;
+
+	/**
+	 * PCR value before extension
+	 */
+	chunk_t pcr_before;
+
+	/**
+	 * PCR value after extension
+	 */
+	chunk_t pcr_after;
+
+	/**
+	 * Transformation used for extending measurement into PCR
+	 */
+	pts_pcr_transform_t transform;
+
+	/**
+	 * Component Validation Result
+	 */
+	pts_comp_evid_validation_t validation;
+
+	/**
+	 * Verification Policy URI
+	 */
+	char *policy_uri;
+
+};
+
+METHOD(pts_comp_evidence_t, get_comp_func_name, pts_comp_func_name_t*,
+	private_pts_comp_evidence_t *this, u_int32_t *depth)
+{
+	if (depth)
+	{
+		*depth = this->depth;
+	}
+	return this->name;
+}
+
+METHOD(pts_comp_evidence_t, get_extended_pcr, u_int32_t,
+	private_pts_comp_evidence_t *this)
+{
+	return this->extended_pcr;
+}
+
+METHOD(pts_comp_evidence_t, get_measurement, chunk_t,
+	private_pts_comp_evidence_t *this, u_int32_t *extended_pcr,
+	pts_meas_algorithms_t *algo, pts_pcr_transform_t *transform,
+	time_t *measurement_time)
+{
+	if (extended_pcr)
+	{
+		*extended_pcr = this->extended_pcr;
+	}
+	if (algo)
+	{
+		*algo = this->hash_algorithm;
+	}
+	if (transform)
+	{
+		*transform = this->transform;
+	}
+	if (measurement_time)
+	{
+		*measurement_time = this->measurement_time;
+	}
+	return this->measurement;
+}
+
+METHOD(pts_comp_evidence_t, get_pcr_info, bool,
+	private_pts_comp_evidence_t *this, chunk_t *pcr_before, chunk_t *pcr_after)
+{
+	if (pcr_before)
+	{
+		*pcr_before = this->pcr_before;
+	}
+	if (pcr_after)
+	{
+		*pcr_after = this->pcr_after;
+	}
+	return this->has_pcr_info;
+}
+
+METHOD(pts_comp_evidence_t, set_pcr_info, void,
+	private_pts_comp_evidence_t *this, chunk_t pcr_before, chunk_t pcr_after)
+{
+	this->has_pcr_info = TRUE;
+	this->pcr_before = pcr_before;
+	this->pcr_after =  pcr_after;
+
+	DBG3(DBG_PTS, "PCR %2d before value : %#B", this->extended_pcr, &pcr_before);
+	DBG3(DBG_PTS, "PCR %2d after value  : %#B", this->extended_pcr, &pcr_after);
+}
+
+METHOD(pts_comp_evidence_t, get_validation, pts_comp_evid_validation_t,
+	private_pts_comp_evidence_t *this, char **uri)
+{
+	if (uri)
+	{
+		*uri = this->policy_uri;
+	}
+	return this->validation;
+}
+
+METHOD(pts_comp_evidence_t, set_validation, void,
+	private_pts_comp_evidence_t *this, pts_comp_evid_validation_t validation,
+	char *uri)
+{
+	this->validation = validation;
+	if (uri)
+	{
+		this->policy_uri = strdup(uri);
+		DBG3(DBG_PTS, "'%s'", uri);
+	}
+}
+
+METHOD(pts_comp_evidence_t, destroy, void,
+	private_pts_comp_evidence_t *this)
+{
+	this->name->destroy(this->name);
+	free(this->measurement.ptr);
+	free(this->pcr_before.ptr);
+	free(this->pcr_after.ptr);
+	free(this->policy_uri);
+	free(this);
+}
+
+/**
+ * See header
+ */
+pts_comp_evidence_t *pts_comp_evidence_create(pts_comp_func_name_t *name,
+											  u_int32_t depth,
+											  u_int32_t extended_pcr,
+											  pts_meas_algorithms_t algo,
+											  pts_pcr_transform_t transform,
+											  time_t measurement_time,
+											  chunk_t measurement)
+{
+	private_pts_comp_evidence_t *this;
+
+	INIT(this,
+		.public = {
+			.get_comp_func_name = _get_comp_func_name,
+			.get_extended_pcr = _get_extended_pcr,
+			.get_measurement = _get_measurement,
+			.get_pcr_info = _get_pcr_info,
+			.set_pcr_info = _set_pcr_info,
+			.get_validation = _get_validation,
+			.set_validation = _set_validation,
+			.destroy = _destroy,
+		},
+		.name = name,
+		.depth = depth,
+		.extended_pcr = extended_pcr,
+		.hash_algorithm = algo,
+		.transform = transform,
+		.measurement_time = measurement_time,
+		.measurement = measurement,
+	);
+
+	name->log(name, "");
+	DBG3(DBG_PTS, "measurement time: %T", &measurement_time, FALSE);
+	DBG3(DBG_PTS, "PCR %2d extended with: %#B", extended_pcr, &measurement);
+
+	return &this->public;
+}
+
+/**
+ * See header
+ */
+pts_pcr_transform_t pts_meas_algo_to_pcr_transform(pts_meas_algorithms_t algo,
+												   size_t pcr_len)
+{
+	size_t hash_size;
+
+	hash_size = pts_meas_algo_hash_size(algo);
+	if (hash_size == 0)
+	{
+		return PTS_PCR_TRANSFORM_NO;
+	}
+	if (hash_size == pcr_len)
+	{
+		return PTS_PCR_TRANSFORM_MATCH;
+	}
+	if (hash_size > pcr_len)
+	{
+		return PTS_PCR_TRANSFORM_LONG;
+	}
+	return PTS_PCR_TRANSFORM_SHORT;
+}
+