online 2 0_I|Mjq؂aa*j"T S*laji?u@?p bѿ xM_I|+ B/* * Copyright (C) Internet Systems Consortium, Inc. ("ISC") * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, you can obtain one at https://mozilla.org/MPL/2.0/. * * See the COPYRIGHT file distributed with this work for additional * information regarding copyright ownership. */ #ifndef DNS_NSEC3_H #define DNS_NSEC3_H 1 #include #include #include #include #include #include #include #include #include #define DNS_NSEC3_SALTSIZE 255 #define DNS_NSEC3_MAXITERATIONS 150U /* * hash = 1, flags =1, iterations = 2, salt length = 1, salt = 255 (max) * hash length = 1, hash = 255 (max), bitmap = 8192 + 512 (max) */ #define DNS_NSEC3_BUFFERSIZE (6 + 255 + 255 + 8192 + 512) /* * hash = 1, flags = 1, iterations = 2, salt length = 1, salt = 255 (max) */ #define DNS_NSEC3PARAM_BUFFERSIZE (5 + 255) /* * Test "unknown" algorithm. Is mapped to dns_hash_sha1. */ #define DNS_NSEC3_UNKNOWNALG ((dns_hash_t)245U) ISC_LANG_BEGINDECLS isc_result_t dns_nsec3_buildrdata(dns_db_t *db, dns_dbversion_t *version, dns_dbnode_t *node, unsigned int hashalg, unsigned int optin, unsigned int iterations, const unsigned char *salt, size_t salt_length, const unsigned char *nexthash, size_t hash_length, unsigned char *buffer, dns_rdata_t *rdata); /*%< * Build the rdata of a NSEC3 record for the data at 'node'. * Note: 'node' is not the node where the NSEC3 record will be stored. * * Requires: * buffer Points to a temporary buffer of at least * DNS_NSEC_BUFFERSIZE bytes. * rdata Points to an initialized dns_rdata_t. * * Ensures: * *rdata Contains a valid NSEC3 rdata. The 'data' member refers * to 'buffer'. */ bool dns_nsec3_typepresent(dns_rdata_t *nsec, dns_rdatatype_t type); /*%< * Determine if a type is marked as present in an NSEC3 record. * * Requires: * 'nsec' points to a valid rdataset of type NSEC3 */ isc_result_t dns_nsec3_generate_salt(unsigned char *salt, size_t saltlen); /*%< * Generate a salt with the given salt length. */ isc_result_t dns_nsec3_hashname(dns_fixedname_t *result, unsigned char rethash[NSEC3_MAX_HASH_LENGTH], size_t *hash_length, const dns_name_t *name, const dns_name_t *origin, dns_hash_t hashalg, unsigned int iterations, const unsigned char *salt, size_t saltlength); /*%< * Make a hashed domain name from an unhashed one. If rethash is not NULL * the raw hash is stored there. */ unsigned int dns_nsec3_hashlength(dns_hash_t hash); /*%< * Return the length of the hash produced by the specified algorithm * or zero when unknown. */ bool dns_nsec3_supportedhash(dns_hash_t hash); /*%< * Return whether we support this hash algorithm or not. */ isc_result_t dns_nsec3_addnsec3(dns_db_t *db, dns_dbversion_t *version, const dns_name_t *name, const dns_rdata_nsec3param_t *nsec3param, dns_ttl_t nsecttl, bool unsecure, dns_diff_t *diff); isc_result_t dns_nsec3_addnsec3s(dns_db_t *db, dns_dbversion_t *version, const dns_name_t *name, dns_ttl_t nsecttl, bool unsecure, dns_diff_t *diff); isc_result_t dns_nsec3_addnsec3sx(dns_db_t *db, dns_dbversion_t *version, const dns_name_t *name, dns_ttl_t nsecttl, bool unsecure, dns_rdatatype_t private, dns_diff_t *diff); /*%< * Add NSEC3 records for 'name', recording the change in 'diff'. * Adjust previous NSEC3 records, if any, to reflect the addition. * The existing NSEC3 records are removed. * * dns_nsec3_addnsec3() will only add records to the chain identified by * 'nsec3param'. * * 'unsecure' should be set to reflect if this is a potentially * unsecure delegation (no DS record). * * dns_nsec3_addnsec3s() will examine the NSEC3PARAM RRset to determine which * chains to b