- implemented, untested

2005-11-22 12:30:31 +00:00
parent 6aa61b01d2
commit ab6908f116
2 changed files with 259 additions and 0 deletions
@@ -0,0 +1,84 @@
+/**
+ * @file prf_plus.h
+ * 
+ * @brief Implements the prf+ function described in IKEv2 draft.
+ * 
+ */
+
+/*
+ * Copyright (C) 2005 Jan Hutter, Martin Willi
+ * 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.
+ */
+
+#ifndef PRF_PLUS_H_
+#define PRF_PLUS_H_
+
+
+#include "prfs/prf.h"
+
+
+/**
+ * Object representing a prf_plus
+ */
+typedef struct prf_plus_s prf_plus_t;
+
+struct prf_plus_s {
+	/**
+	 * @brief Get pseudo random bytes.
+	 * 
+	 * @param this			calling prf_plus
+	 * @param length		number of bytes to get
+	 * @param [out]buffer	pointer where the generated bytes will be written
+	 * @return				
+	 * 						- SUCCESS in any case
+	 */
+	status_t (*get_bytes) (prf_plus_t *this, size_t length, u_int8_t *buffer);
+	
+	/**
+	 * @brief Allocate pseudo random bytes.
+	 * 
+	 * @param this			calling prf_plus
+	 * @param length		number of bytes to get
+	 * @param [out]chunk	chunk which will hold generated bytes
+	 * @return				
+	 * 						- SUCCESS in any case
+	 * 						- OUT_OF_RES if space could not be allocated
+	 */
+	status_t (*allocate_bytes) (prf_plus_t *this, size_t length, chunk_t *chunk);
+	
+	/**
+	 * @brief Destroys a prf_plus object.
+	 *
+	 * @param this 			prf_plus_t object to destroy
+	 * @return 		
+	 * 						- SUCCESS in any case
+	 */
+	status_t (*destroy) (prf_plus_t *this);
+};
+
+/**
+ * Creates a new prf_plus_t object
+ * 
+ * Seed will be cloned. prf will
+ * not be cloned, must be destroyed outside after
+ * prf_plus usage.
+ * 
+ * @param prf				prf object to use
+ * @param seed				input seed for prf
+ * @return
+ *							- prf_plus_t if successfully
+ *							- NULL if out of ressources or hash not supported
+ */
+prf_plus_t *prf_plus_create(prf_t *prf, chunk_t seed);
+
+#endif /*PRF_PLUS_H_*/