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diff --git a/src/libstrongswan/plugins/md4/md4_hasher.h b/src/libstrongswan/plugins/md4/md4_hasher.h
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+/*
+ * Copyright (C) 2008 Martin Willi
+ * Copyright (C) 2005 Jan Hutter
+ * 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 md4_hasher md4_hasher
+ * @{ @ingroup md4_p
+ */
+
+#ifndef MD4_HASHER_H_
+#define MD4_HASHER_H_
+
+typedef struct md4_hasher_t md4_hasher_t;
+
+#include <crypto/hashers/hasher.h>
+
+/**
+ * Implementation of hasher_t interface using the MD4 algorithm.
+ */
+struct md4_hasher_t {
+	
+	/**
+	 * Generic hasher_t interface for this hasher.
+	 */
+	hasher_t hasher_interface;
+};
+
+/**
+ * Creates a new md4_hasher_t.
+ * 
+ * @param algo		hash algorithm, must be HASH_MD4
+ * @return			md4_hasher_t object, NULL if not supported
+ */
+md4_hasher_t *md4_hasher_create(hash_algorithm_t algo);
+
+#endif /*MD4_HASHER_H_@}*/