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/*
* Copyright (C) 2013 Ruslan Marchenko
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/**
* @defgroup dnscert_i dnscert
* @{ @ingroup dnscert
*/
#ifndef DNSCERT_H_
#define DNSCERT_H_
typedef struct dnscert_t dnscert_t;
typedef enum dnscert_algorithm_t dnscert_algorithm_t;
typedef enum dnscert_type_t dnscert_type_t;
#include <library.h>
/**
* DNS CERT types as defined in RFC 4398.
*/
enum dnscert_type_t {
/** Reserved value */
DNSCERT_TYPE_RESERVED = 0,
/** An x509 PKIX certificate */
DNSCERT_TYPE_PKIX = 1,
/** A SKPI certificate */
DNSCERT_TYPE_SKPI = 2,
/** A PGP certificate */
DNSCERT_TYPE_PGP = 3,
/** An x509 PKIX cert URL */
DNSCERT_TYPE_IPKIX = 4,
/** A SKPI cert URL */
DNSCERT_TYPE_ISKPI = 5,
/** A PGP cert fingerprint and URL */
DNSCERT_TYPE_IPGP = 6,
/** An attribute Certificate */
DNSCERT_TYPE_ACPKIX = 7,
/** An attribute cert URL */
DNSCERT_TYPE_IACKPIX = 8
};
/**
* DNSCERT algorithms as defined in http://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml#dns-sec-alg-numbers-1
*/
enum dnscert_algorithm_t {
/** No defined */
DNSCERT_ALGORITHM_UNDEFINED = 0,
/** RSA/MD5 */
DNSCERT_ALGORITHM_RSAMD5 = 1,
/** Diffie-Hellman */
DNSCERT_ALGORITHM_DH = 2,
/** DSA/SHA1 */
DNSCERT_ALGORITHM_DSASHA = 3,
/** Reserved */
DNSCERT_ALGORITHM_RSRVD4 = 4,
/** RSA/SHA1 */
DNSCERT_ALGORITHM_RSASHA = 5,
/** DSA/NSEC3/SHA */
DNSCERT_ALGORITHM_DSANSEC3 = 6,
/** RSA/NSEC3/SHA */
DNSCERT_ALGORITHM_RSANSEC3 = 7,
/** RSA/SHA256 */
DNSCERT_ALGORITHM_RSASHA256 = 8,
/** Reserved */
DNSCERT_ALGORITHM_RSRVD9 = 9,
/** RSA/SHA512 */
DNSCERT_ALGORITHM_RSASHA512 = 10,
};
/**
* DNS CERT RR as defined in RFC 4398.
*
* The CERT resource record (RR) has the structure given below. Its RR
* type code is 37.
*
* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | type | key tag |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | algorithm | /
* +---------------+ certificate or CRL /
* / /
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-|
*/
struct dnscert_t {
/**
* Get the type of the certificate body.
*
* The certificate "type" determines the format of the body
* of the CERT data.
*
* @return certificate type
*/
dnscert_type_t (*get_cert_type)(dnscert_t *this);
/**
* Get the tag of the key part of the CERT.
*
* @return keytag
*/
uint16_t (*get_key_tag)(dnscert_t *this);
/**
* Get the algorithm.
*
* The "algorithm" determines the format of the public key field
* of the DNS CERT.
*
* @return algorithm
*/
dnscert_algorithm_t (*get_algorithm)(dnscert_t *this);
/**
* Get the content of the certificate field as chunk.
*
* The format of the certificate depends on the type.
*
* The data pointed by the chunk is still owned by the DNSCERT.
* Clone it if necessary.
*
* @return certificate field as chunk
*/
chunk_t (*get_certificate)(dnscert_t *this);
/**
* Destroy the DNSCERT.
*/
void (*destroy) (dnscert_t *this);
};
/**
* Create a dnscert instance out of a resource record.
*
* @param rr resource record which contains a DNSCERT
* @return dnscert, NULL on failure
*/
dnscert_t *dnscert_create_frm_rr(rr_t *rr);
#endif /** DNSCERT_H_ @}*/
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