1 files changed, 147 insertions, 0 deletions
diff --git a/src/libstrongswan/plugins/ntru/ntru_plugin.c b/src/libstrongswan/plugins/ntru/ntru_plugin.c
new file mode 100644
index 000000000..4ec6bc3df
--- /dev/null
+++ b/src/libstrongswan/plugins/ntru/ntru_plugin.c
@@ -0,0 +1,147 @@
+/*
+ * 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 "ntru_plugin.h"
+#include "ntru_ke.h"
+
+#include <library.h>
+#include <utils/debug.h>
+
+typedef struct private_ntru_plugin_t private_ntru_plugin_t;
+
+rng_t *rng;
+
+bool ntru_plugin_get_entropy(ENTROPY_CMD cmd, uint8_t *out)
+{
+	switch (cmd)
+	{
+		case INIT:
+	        return TRUE;
+		case GET_NUM_BYTES_PER_BYTE_OF_ENTROPY:
+			/* Here we return the number of bytes needed from the entropy
+			 * source to obtain 8 bits of entropy.  Maximum is 8.
+			 */
+			if (!out)
+			{
+				return FALSE;
+			}
+	        *out = 1;	/* this is a perfectly random source */
+			return TRUE;
+		case GET_BYTE_OF_ENTROPY:
+			if (!out)
+			{
+				return FALSE;
+			}
+			if (!rng || !rng->get_bytes(rng, 1, out))
+			{
+				return FALSE;
+			}
+			DBG2(DBG_LIB, "read one byte of entropy");
+			return TRUE;
+		default:
+			return FALSE;
+    }
+}
+
+/**
+ * Create/Destroy True Random Generator
+ */
+static bool create_random(private_ntru_plugin_t *this,
+						  plugin_feature_t *feature, bool reg, void *data)
+{
+	if (reg)
+	{
+		rng = lib->crypto->create_rng(lib->crypto, RNG_TRUE);
+		if (!rng)
+		{
+			return FALSE;
+		}
+	}
+	else
+	{
+		rng->destroy(rng);
+	}
+	return TRUE;
+}
+
+/**
+ * private data of ntru_plugin
+ */
+struct private_ntru_plugin_t {
+
+	/**
+	 * public functions
+	 */
+	ntru_plugin_t public;
+};
+
+METHOD(plugin_t, get_name, char*,
+	private_ntru_plugin_t *this)
+{
+	return "ntru";
+}
+
+METHOD(plugin_t, get_features, int,
+	private_ntru_plugin_t *this, plugin_feature_t *features[])
+{
+	int count = 0;
+
+	static plugin_feature_t f_ke[] = {
+		PLUGIN_REGISTER(DH, ntru_ke_create),
+			PLUGIN_PROVIDE(DH, NTRU_112_BIT),
+			PLUGIN_PROVIDE(DH, NTRU_128_BIT),
+			PLUGIN_PROVIDE(DH, NTRU_192_BIT),
+			PLUGIN_PROVIDE(DH, NTRU_256_BIT),
+	};
+	static plugin_feature_t f_rng[] = {
+		PLUGIN_CALLBACK((plugin_feature_callback_t)create_random, NULL),
+			PLUGIN_PROVIDE(CUSTOM, "ntru-rng"),
+			PLUGIN_DEPENDS(RNG, RNG_TRUE),
+	};
+	static plugin_feature_t f[countof(f_ke) + countof(f_rng)] = {};
+
+	plugin_features_add(f, f_ke, countof(f_ke), &count);
+	plugin_features_add(f, f_rng, countof(f_rng), &count);
+	
+	*features = f;
+	return count;
+}
+
+METHOD(plugin_t, destroy, void,
+	private_ntru_plugin_t *this)
+{
+	free(this);
+}
+
+/*
+ * see header file
+ */
+plugin_t *ntru_plugin_create()
+{
+	private_ntru_plugin_t *this;
+
+	INIT(this,
+		.public = {
+			.plugin = {
+				.get_name = _get_name,
+				.get_features = _get_features,
+				.destroy = _destroy,
+			},
+		},
+	);
+
+
+	return &this->public.plugin;
+}