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+/**
+ * \file havege.h
+ *
+ * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
+ *
+ * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org>
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the names of PolarSSL or XySSL nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef POLARSSL_HAVEGE_H
+#define POLARSSL_HAVEGE_H
+
+#define COLLECT_SIZE 1024
+
+/**
+ * \brief HAVEGE state structure
+ */
+typedef struct
+{
+ int PT1, PT2, offset[2];
+ int pool[COLLECT_SIZE];
+ int WALK[8192];
+}
+havege_state;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief HAVEGE initialization
+ *
+ * \param hs HAVEGE state to be initialized
+ */
+void havege_init( havege_state *hs );
+
+/**
+ * \brief HAVEGE rand function
+ *
+ * \param rng_st points to an HAVEGE state
+ *
+ * \return A random int
+ */
+int havege_rand( void *p_rng );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* havege.h */