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diff --git a/src/libstrongswan/asn1/asn1_parser.h b/src/libstrongswan/asn1/asn1_parser.h
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+/*
+ * Copyright (C) 2006 Martin Will
+ * Copyright (C) 2000-2008 Andreas Steffen
+ *
+ * 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.
+ *
+ * $Id: asn1_parser.h 3894 2008-04-28 18:44:21Z andreas $
+ */
+ 
+/**
+ * @defgroup asn1_parser asn1_parser
+ * @{ @ingroup asn1
+ */
+
+#ifndef ASN1_PARSER_H_
+#define ASN1_PARSER_H_
+
+#include <stdarg.h>
+
+#include <library.h>
+
+/**
+ * Definition of ASN.1 flags
+ */
+#define ASN1_NONE	0x00
+#define ASN1_DEF	0x01
+#define ASN1_OPT	0x02
+#define ASN1_LOOP	0x04
+#define ASN1_END	0x08
+#define ASN1_OBJ	0x10
+#define ASN1_BODY	0x20
+#define ASN1_RAW	0x40
+#define ASN1_EXIT	0x80
+
+typedef struct asn1Object_t asn1Object_t;
+
+/**
+ * Syntax definition of an ASN.1 object
+ */
+struct asn1Object_t{
+	u_int level;
+	const u_char *name;
+	asn1_t type;
+	u_char flags;
+};
+
+typedef struct asn1_parser_t asn1_parser_t;
+
+/**
+ * Public interface of an ASN.1 parser 
+ */
+struct asn1_parser_t {
+
+	/**
+	 * Parse the next ASN.1 object in the hierarchy and return it
+	 *
+	 * @param objectID	current line in the object syntax definition
+	 * @param object	current object
+	 * @return 			- FALSE if end of object syntax definition was reached
+	 *							or a parsing error occurred
+	 *					- TRUE	otherwise
+     */
+	bool (*iterate)(asn1_parser_t *this, int *objectID, chunk_t *object);
+
+	/**
+     * Get the current parsing level
+	 *
+	 * @return 			current level
+	 */
+	u_int (*get_level)(asn1_parser_t *this);
+
+	/**
+     * Set the top-most level
+	 *
+	 * @param level		top-most level
+	 */
+	void (*set_top_level)(asn1_parser_t *this, u_int level0);
+
+	/**
+     * Set implicit and private flags
+	 *
+	 * @param implicit	top-most type of object is implicit
+	 * @param private	object data is private (use debug level 4)
+	 */
+	void (*set_flags)(asn1_parser_t *this, bool implicit, bool private);
+
+	/**
+     * Show final parsing status
+	 *
+	 * @return			TRUE if parsing was successful, FALSE otherwise
+	 */
+	bool (*success)(asn1_parser_t *this);
+
+	/**
+	 * Destroy the ASN.1 parser
+	 */
+	void (*destroy)(asn1_parser_t *this);
+};
+ 
+/**
+ * Create an ASN.1 parser
+ *
+ * @param objects	syntax definition of the ASN.1 object to be parsed
+ * @param blob		ASN.1 coded binary blob
+ * @return			ASN.1 context
+ */
+asn1_parser_t* asn1_parser_create(asn1Object_t const *objects, chunk_t blob);
+
+#endif /* ASN1_PARSER_H_ @}*/