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diff --git a/src/libstrongswan/credentials/ietf_attributes/ietf_attributes.h b/src/libstrongswan/credentials/ietf_attributes/ietf_attributes.h
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+++ b/src/libstrongswan/credentials/ietf_attributes/ietf_attributes.h
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2007-2009 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 ietf_attributes ietf_attributes
+ * @{ @ingroup credentials
+ */
+
+#ifndef IETF_ATTRIBUTES_H_
+#define IETF_ATTRIBUTES_H_
+
+typedef struct ietf_attributes_t ietf_attributes_t;
+
+#include <library.h>
+
+/**
+ *
+ */
+struct ietf_attributes_t {
+
+	/**
+	 * Get the an alphabetically sorted list of printable IETF attributes.
+	 *
+	 * Result points to internal data, do not free.
+	 *
+	 * @return 			a string containing printable attributes
+	 */
+	char* (*get_string) (ietf_attributes_t *this);
+
+	/**
+	 * Get the ASN.1 encoding of the IETF attributes.
+	 *
+	 * @return 			allocated chunk containing the encoded bytes
+	 */
+	chunk_t (*get_encoding) (ietf_attributes_t *this);
+
+	/**
+	 * Check for equality between two lists.
+	 *
+	 * @param other		attribute list to be checked for equality
+	 * @return 			TRUE if equal
+	 */
+	bool (*equals) (ietf_attributes_t *this, ietf_attributes_t *other);
+
+	/**
+	 * Check for common attributes between two lists.
+	 *
+	 * @param other		attribute list to be matched 
+	 * @return 			TRUE if there is at least a common attribute
+	 */
+	bool (*matches) (ietf_attributes_t *this, ietf_attributes_t *other);
+
+	/**
+	 * Get a new reference to the IETF attributes.
+	 *
+	 * @return			this, with an increased refcount
+	 */
+	ietf_attributes_t* (*get_ref)(ietf_attributes_t *this);
+
+	/**
+	 * Destroys an ietf_attributes_t object.
+	 */
+	void (*destroy) (ietf_attributes_t *this);
+};
+
+/**
+ * @param string	input string, which will be converted
+ * @return			ietf_attributes_t
+ */
+ietf_attributes_t *ietf_attributes_create_from_string(char *string);
+
+/**
+ * @param encoded	ASN.1 encoded bytes, such as from ietf_attributes.get_encoding
+ * @return			ietf_attributes_t
+ */
+ietf_attributes_t *ietf_attributes_create_from_encoding(chunk_t encoded);
+
+#endif /** IETF_ATTRIBUTES_H_ @}*/
+