1 files changed, 105 insertions, 0 deletions
diff --git a/src/libpts/pts/pts_meas_algo.h b/src/libpts/pts/pts_meas_algo.h
new file mode 100644
index 000000000..1d96a4946
--- /dev/null
+++ b/src/libpts/pts/pts_meas_algo.h
@@ -0,0 +1,105 @@
+/*
+ * 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 pts_meas_algo pts_meas_algo
+ * @{ @ingroup pts
+ */
+
+#ifndef PTS_MEAS_ALGO_H_
+#define PTS_MEAS_ALGO_H_
+
+#include <library.h>
+#include <crypto/hashers/hasher.h>
+
+typedef enum pts_meas_algorithms_t pts_meas_algorithms_t;
+
+/**
+ * PTS Measurement Algorithms
+ */
+enum pts_meas_algorithms_t {
+	PTS_MEAS_ALGO_NONE   =	   0,
+	PTS_MEAS_ALGO_SHA1   =	(1<<15),
+	PTS_MEAS_ALGO_SHA256 =	(1<<14),
+	PTS_MEAS_ALGO_SHA384 =	(1<<13),
+};
+
+/**
+ * enum name for pts_meas_algorithms_t.
+ */
+extern enum_name_t *pts_meas_algorithm_names;
+
+/**
+ * Diffie-Hellman Hash Algorithm Values
+ * see section 3.8.5 of PTS Protocol: Binding to TNC IF-M Specification
+ *
+ *					   1
+ *   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |1|2|3|R|R|R|R|R|R|R|R|R|R|R|R|R|
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  
+ */
+
+/**
+ * Probe available PTS measurement algorithms
+ *
+ * @param algorithms	set of available algorithms
+ * @return				TRUE if mandatory algorithms are available
+ */
+bool pts_meas_algo_probe(pts_meas_algorithms_t *algorithms);
+
+/**
+ * Update supported PTS measurement algorithms according to configuration
+ *
+ * sha1 :  PTS_MEAS_ALGO_SHA1
+ * sha256: PTS_MEAS_ALGO_SHA1 | PTS_MEAS_ALGO_SHA256
+ * sha384: PTS_MEAS_ALGO_SHA1 | PTS_MEAS_ALGO_SHA256 | PTS_MEAS_ALGO_SHA384
+ *
+ * The PTS-IMC is expected to select the strongest supported algorithm
+ *
+ * @param hash_alg		configured hash algorithm
+ * @param algorithms	returns set of available PTS measurement algorithms
+ */
+bool pts_meas_algo_update(char *hash_alg, pts_meas_algorithms_t *algorithms);
+
+/**
+ * Select the strongest PTS measurement algorithm
+ * among a set of offered PTS measurement algorithms
+ *
+ * @param supported_algos	set of supported PTS measurement algorithms
+ * @param offered_algos		set of offered PTS measurements algorithms
+ * @return					selected algorithm
+ */
+pts_meas_algorithms_t pts_meas_algo_select(pts_meas_algorithms_t supported_algos,
+										   pts_meas_algorithms_t offered_algos);
+
+/**
+ * Convert pts_meas_algorithms_t to hash_algorithm_t
+ *
+ * @param algorithm		PTS measurement algorithm type
+ * @return				libstrongswan hash algorithm type
+ */
+hash_algorithm_t pts_meas_algo_to_hash(pts_meas_algorithms_t algorithm);
+
+/**
+ * Return the hash size of a pts_meas_algorithm
+ *
+ * @param algorithm		PTS measurement algorithm type
+ * @return				hash size in bytes
+ */
+size_t pts_meas_algo_hash_size(pts_meas_algorithms_t algorithm);
+
+#endif /** PTS_MEAS_ALGO_H_ @}*/