dnscert: Add DNS CERT support for pubkey authentication
Add DNSSEC protected CERT RR delivered certificate authentication. The new dnscert plugin is based on the ipseckey plugin and relies on the existing PEM decoder as well as x509 and PGP parsers. As such the plugin expects PEM encoded PKIX(x509) or PGP(GPG) certificate payloads. The plugin is targeted to improve interoperability with Racoon, which supports this type of authentication, ignoring in-stream certificates and using only DNS provided certificates for FQDN IDs.
This commit is contained in:
Ruslan N. Marchenko
committed by
Tobias Brunner
Tobias Brunner
parent
8ac54970f5
commit
b638c131de
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/*
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* Copyright (C) 2013 Ruslan Marchenko
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/**
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* @defgroup dnscert_i dnscert
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* @{ @ingroup dnscert
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*/
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#ifndef DNSCERT_H_
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#define DNSCERT_H_
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typedef struct dnscert_t dnscert_t;
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typedef enum dnscert_algorithm_t dnscert_algorithm_t;
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typedef enum dnscert_type_t dnscert_type_t;
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#include <library.h>
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/**
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* DNS CERT types as defined in RFC 4398.
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*/
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enum dnscert_type_t {
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/** Reserved value */
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DNSCERT_TYPE_RESERVED = 0,
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/** An x509 PKIX certificate */
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DNSCERT_TYPE_PKIX = 1,
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/** A SKPI certificate */
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DNSCERT_TYPE_SKPI = 2,
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/** A PGP certificate */
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DNSCERT_TYPE_PGP = 3,
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/** An x509 PKIX cert URL */
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DNSCERT_TYPE_IPKIX = 4,
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/** A SKPI cert URL */
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DNSCERT_TYPE_ISKPI = 5,
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/** A PGP cert fingerprint and URL */
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DNSCERT_TYPE_IPGP = 6,
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/** An attribute Certificate */
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DNSCERT_TYPE_ACPKIX = 7,
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/** An attribute cert URL */
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DNSCERT_TYPE_IACKPIX = 8
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};
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/**
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* DNSCERT algorithms as defined in http://www.iana.org/assignments/
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* dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml#dns-sec-alg-numbers-1
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*/
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enum dnscert_algorithm_t {
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/** No defined */
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DNSCERT_ALGORITHM_UNDEFINED = 0,
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/** RSA/MD5 */
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DNSCERT_ALGORITHM_RSAMD5 = 1,
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/** Diffie-Hellman */
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DNSCERT_ALGORITHM_DH = 2,
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/** DSA/SHA1 */
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DNSCERT_ALGORITHM_DSASHA = 3,
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/** Reserved */
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DNSCERT_ALGORITHM_RSRVD4 = 4,
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/** RSA/SHA1 */
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DNSCERT_ALGORITHM_RSASHA = 5,
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/** DSA/NSEC3/SHA */
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DNSCERT_ALGORITHM_DSANSEC3 = 6,
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/** RSA/NSEC3/SHA */
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DNSCERT_ALGORITHM_RSANSEC3 = 7,
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/** RSA/SHA256 */
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DNSCERT_ALGORITHM_RSASHA256 = 8,
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/** Reserved */
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DNSCERT_ALGORITHM_RSRVD9 = 9,
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/** RSA/SHA512 */
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DNSCERT_ALGORITHM_RSASHA512 = 10,
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};
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/**
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* DNS CERT RR as defined in RFC 4398.
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*
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* The CERT resource record (RR) has the structure given below. Its RR
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* type code is 37.
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*
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* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
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* 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
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | type | key tag |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | algorithm | /
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* +---------------+ certificate or CRL /
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* / /
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-|
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*/
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struct dnscert_t {
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/**
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* Get the type of the certificate body.
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*
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* The certificate "type" determines the format of the body
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* of the CERT data.
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*
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* @return certificate type
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*/
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dnscert_type_t (*get_cert_type)(dnscert_t *this);
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/**
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* Get the tag of the key part of the CERT.
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*
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* @return keytag
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*/
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u_int16_t (*get_key_tag)(dnscert_t *this);
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/**
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* Get the algorithm.
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*
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* The "algorithm" determines the format of the public key field
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* of the DNS CERT.
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*
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* @return algorithm
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*/
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dnscert_algorithm_t (*get_algorithm)(dnscert_t *this);
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/**
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* Get the content of the certificate field as chunk.
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*
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* The format of the certificate depends on the type.
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*
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* The data pointed by the chunk is still owned by the DNSCERT.
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* Clone it if necessary.
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*
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* @return certificate field as chunk
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*/
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chunk_t (*get_certificate)(dnscert_t *this);
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/**
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* Destroy the DNSCERT.
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*/
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void (*destroy) (dnscert_t *this);
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};
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/**
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* Create a dnscert instance out of a resource record.
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*
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* @param rr resource record which contains a DNSCERT
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* @return dnscert, NULL on failure
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*/
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dnscert_t *dnscert_create_frm_rr(rr_t *rr);
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#endif /** DNSCERT_H_ @}*/
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