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Diffstat (limited to '')
| -rw-r--r-- | lib/dnssec/nsec.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/lib/dnssec/nsec.h b/lib/dnssec/nsec.h new file mode 100644 index 0000000..9439a88 --- /dev/null +++ b/lib/dnssec/nsec.h @@ -0,0 +1,105 @@ +/* Copyright (C) 2015-2017 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz> + + 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 3 of the License, or + (at your option) any later version. + + 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. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#pragma once + +#include <libknot/packet/pkt.h> + +/** + * Check bitmap that child names are contained in the same zone. + * @note see RFC6840 4.1. + * @param bm Bitmap from NSEC or NSEC3. + * @param bm_size Bitmap size. + * @return 0 if they are, >0 if not (abs(ENOENT)), <0 on error. + */ +int kr_nsec_children_in_zone_check(const uint8_t *bm, uint16_t bm_size); + +/** + * Check an NSEC or NSEC3 bitmap for NODATA for a type. + * @param bm Bitmap. + * @param bm_size Bitmap size. + * @param type RR type to check. + * @param owner NSEC record owner. + * @note This includes special checks for zone cuts, e.g. from RFC 6840 sec. 4. + * @return 0, abs(ENOENT) (no proof), kr_error(EINVAL) + */ +int kr_nsec_bitmap_nodata_check(const uint8_t *bm, uint16_t bm_size, uint16_t type, const knot_dname_t *owner); + +/** + * Name error response check (RFC4035 3.1.3.2; RFC4035 5.4, bullet 2). + * @note No RRSIGs are validated. + * @param pkt Packet structure to be processed. + * @param section_id Packet section to be processed. + * @param sname Name to be checked. + * @return 0 or error code. + */ +int kr_nsec_name_error_response_check(const knot_pkt_t *pkt, knot_section_t section_id, + const knot_dname_t *sname); + +/** + * No data response check (RFC4035 3.1.3.1; RFC4035 5.4, bullet 1). + * @param pkt Packet structure to be processed. + * @param section_id Packet section to be processed. + * @param sname Name to be checked. + * @param stype Type to be checked. + * @return 0 or error code. + */ +int kr_nsec_no_data_response_check(const knot_pkt_t *pkt, knot_section_t section_id, + const knot_dname_t *sname, uint16_t stype); + +/** + * Wildcard answer response check (RFC4035 3.1.3.3). + * @param pkt Packet structure to be processed. + * @param section_id Packet section to be processed. + * @param sname Name to be checked. + * @return 0 or error code. + */ +int kr_nsec_wildcard_answer_response_check(const knot_pkt_t *pkt, knot_section_t section_id, + const knot_dname_t *sname); + +/** + * Authenticated denial of existence according to RFC4035 5.4. + * @note No RRSIGs are validated. + * @param pkt Packet structure to be processed. + * @param section_id Packet section to be processed. + * @param sname Queried domain name. + * @param stype Queried type. + * @return 0 or error code. + */ +int kr_nsec_existence_denial(const knot_pkt_t *pkt, knot_section_t section_id, + const knot_dname_t *sname, uint16_t stype); + +/** + * Referral to unsigned subzone check (RFC4035 5.2). + * @note No RRSIGs are validated. + * @param pkt Packet structure to be processed. + * @return 0 or error code: + * DNSSEC_NOT_FOUND - neither ds nor nsec records + * were not found. + * EEXIST - ds record was found. + * EINVAL - bogus. + */ +int kr_nsec_ref_to_unsigned(const knot_pkt_t *pkt); + +/** + * Checks whether supplied NSEC RR matches the supplied name and type. + * @param nsec NSEC RR. + * @param name Name to be checked. + * @param type Type to be checked. Only use with NS! TODO (+copy&paste NSEC3) + * @return 0 or error code. + */ +int kr_nsec_matches_name_and_type(const knot_rrset_t *nsec, + const knot_dname_t *name, uint16_t type); |