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diff --git a/src/libcharon/encoding/payloads/certreq_payload.h b/src/libcharon/encoding/payloads/certreq_payload.h
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+++ b/src/libcharon/encoding/payloads/certreq_payload.h
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+/*
+ * Copyright (C) 2005-2006 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 certreq_payload certreq_payload
+ * @{ @ingroup payloads
+ */
+
+#ifndef CERTREQ_PAYLOAD_H_
+#define CERTREQ_PAYLOAD_H_
+
+typedef struct certreq_payload_t certreq_payload_t;
+
+#include <library.h>
+#include <encoding/payloads/payload.h>
+#include <encoding/payloads/cert_payload.h>
+
+/**
+ * Length of a CERTREQ payload without the CERTREQ data in bytes.
+ */
+#define CERTREQ_PAYLOAD_HEADER_LENGTH 5
+
+/**
+ * Class representing an IKEv2 CERTREQ payload.
+ *
+ * The CERTREQ payload format is described in RFC section 3.7.
+ */
+struct certreq_payload_t {
+	/**
+	 * The payload_t interface.
+	 */
+	payload_t payload_interface;
+
+	/**
+	 * Create an enumerator over contained keyids.
+	 *
+	 * @return			enumerator over chunk_t's.
+	 */
+	enumerator_t* (*create_keyid_enumerator)(certreq_payload_t *this);
+
+	/**
+	 * Get the type of contained certificate keyids.
+	 *
+	 * @return			certificate keyid type
+	 */
+	certificate_type_t (*get_cert_type)(certreq_payload_t *this);
+
+	/**
+	 * Add a certificates keyid to the payload.
+	 *
+	 * @param keyid		keyid of the trusted certifcate
+	 * @return
+	 */
+	void (*add_keyid)(certreq_payload_t *this, chunk_t keyid);
+
+	/**
+	 * Destroys an certreq_payload_t object.
+	 */
+	void (*destroy) (certreq_payload_t *this);
+};
+
+/**
+ * Creates an empty certreq_payload_t object.
+ *
+ * @return 				certreq payload
+ */
+certreq_payload_t *certreq_payload_create(void);
+
+/**
+ * Creates an empty certreq_payload_t for a kind of certificates.
+ *
+ * @param type			type of the added keyids
+ * @return 				certreq payload
+ */
+certreq_payload_t *certreq_payload_create_type(certificate_type_t type);
+
+#endif /** CERTREQ_PAYLOAD_H_ @}*/