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/*
* Copyright (C) 2012 Reto Guadagnini
* 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 ipseckey_i ipseckey
* @{ @ingroup ipseckey
*/
#ifndef IPSECKEY_H_
#define IPSECKEY_H_
typedef struct ipseckey_t ipseckey_t;
typedef enum ipseckey_algorithm_t ipseckey_algorithm_t;
typedef enum ipseckey_gw_type_t ipseckey_gw_type_t;
#include <library.h>
/**
* IPSECKEY gateway types as defined in RFC 4025.
*/
enum ipseckey_gw_type_t {
/** No gateway is present */
IPSECKEY_GW_TP_NOT_PRESENT = 0,
/** A 4-byte IPv4 address is present */
IPSECKEY_GW_TP_IPV4 = 1,
/** A 16-byte IPv6 address is present */
IPSECKEY_GW_TP_IPV6 = 2,
/** A wire-encoded domain name is present */
IPSECKEY_GW_TP_WR_ENC_DNAME = 3,
};
/**
* IPSECKEY algorithms as defined in RFC 4025.
*/
enum ipseckey_algorithm_t {
/** No key present */
IPSECKEY_ALGORITHM_NONE = 0,
/** DSA key */
IPSECKEY_ALGORITHM_DSA = 1,
/** RSA key */
IPSECKEY_ALGORITHM_RSA = 2,
};
/**
* An IPSECKEY.
*
* Represents an IPSECKEY as defined in RFC 4025:
*
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | precedence | gateway type | algorithm | gateway |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-------------+ +
* ~ gateway ~
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | /
* / public key /
* / /
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-|
*
*
* Note: RFC 4025 defines that the algorithm field has a length of 7 bits.
* We use 8 bits instead, because the use of 7 bits is very uncommon
* in internet protocols and might be an error in RFC 4025
* (also the BIND DNS server uses 8 bits for the algorithm field of the
* IPSECKEY resource records).
*
*/
struct ipseckey_t {
/**
* Get the precedence of the IPSECKEY.
*
* @return precedence
*/
u_int8_t (*get_precedence)(ipseckey_t *this);
/**
* Get the type of the gateway.
*
* The "gateway type" determines the format of the gateway field
* of the IPSECKEY.
*
* @return gateway type
*/
ipseckey_gw_type_t (*get_gateway_type)(ipseckey_t *this);
/**
* Get the algorithm.
*
* The "algorithm" determines the format of the public key field
* of the IPSECKEY.
*
* @return algorithm
*/
ipseckey_algorithm_t (*get_algorithm)(ipseckey_t *this);
/**
* Get the content of the gateway field as chunk.
*
* The content is in network byte order and its format depends on the
* gateway type.
*
* The data pointed by the chunk is still owned by the IPSECKEY.
* Clone it if necessary.
*
* @return gateway field as chunk
*/
chunk_t (*get_gateway)(ipseckey_t *this);
/**
* Get the content of the public key field as chunk.
*
* The format of the public key depends on the algorithm type.
*
* The data pointed by the chunk is still owned by the IPSECKEY.
* Clone it if necessary.
*
* @return public key field as chunk
*/
chunk_t (*get_public_key)(ipseckey_t *this);
/**
* Destroy the IPSECKEY.
*/
void (*destroy) (ipseckey_t *this);
};
/**
* Create an ipseckey instance out of a resource record.
*
* @param rr resource record which contains an IPSECKEY
* @return ipseckey, NULL on failure
*/
ipseckey_t *ipseckey_create_frm_rr(rr_t *rr);
#endif /** IPSECKEY_H_ @}*/
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