Imported Upstream version 5.1.2

1 files changed, 77 insertions, 0 deletions

diff --git a/src/libstrongswan/plugins/ntru/ntru_drbg.h b/src/libstrongswan/plugins/ntru/ntru_drbg.h
new file mode 100644
index 000000000..38ac718ae
--- /dev/null
+++ b/src/libstrongswan/plugins/ntru/ntru_drbg.h
@@ -0,0 +1,77 @@
+/*
+ * 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.
+ */
+
+/**
+ * @defgroup ntru_drbg ntru_drbg
+ * @{ @ingroup ntru_p
+ */
+
+#ifndef NTRU_DRBG_H_
+#define NTRU_DRBG_H_
+
+typedef struct ntru_drbg_t ntru_drbg_t;
+
+#include <library.h>
+
+/**
+ * Implements a HMAC Deterministic Random Bit Generator (HMAC_DRBG)
+ * compliant with NIST SP 800-90A
+ */
+struct ntru_drbg_t {
+
+	/**
+	 * Reseed the instantiated DRBG
+	 *
+	 * @return			configured security strength in bits
+	 */
+	u_int32_t (*get_strength)(ntru_drbg_t *this);
+
+	/**
+	 * Reseed the instantiated DRBG
+	 *
+	 * @return			TRUE if successful
+	 */
+	bool (*reseed)(ntru_drbg_t *this);
+
+	/**
+	 * Generate pseudorandom bytes.
+	 * If the maximum number of requests has been reached, reseeding occurs
+	 *
+	 * @param strength	requested security strength in bits
+	 * @param len		number of octets to generate
+	 * @param out		address of output buffer
+	 * @return			TRUE if successful
+	 */
+	bool (*generate)(ntru_drbg_t *this, u_int32_t strength, u_int32_t len,
+										u_int8_t *out);
+
+	/**
+	 * Uninstantiate and destroy the DRBG object
+	 */
+	void (*destroy)(ntru_drbg_t *this);
+};
+
+/**
+ * Create and instantiate a new DRBG objet.
+ *
+ * @param strength		security strength in bits
+ * @param pers_str		personalization string
+ * @param entropy		entropy source to use
+ */
+ntru_drbg_t *ntru_drbg_create(u_int32_t strength, chunk_t pers_str,
+							  rng_t *entropy);
+
+#endif /** NTRU_DRBG_H_ @}*/
+