/* $NetBSD: nsec3param_51.c,v 1.3.4.1 2024/02/29 12:34:43 martin Exp $ */ /* * Copyright (C) Internet Systems Consortium, Inc. ("ISC") * * SPDX-License-Identifier: MPL-2.0 * * 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. */ /* * Copyright (C) 2004 Nominet, Ltd. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND NOMINET DISCLAIMS ALL WARRANTIES WITH * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. */ /* RFC 5155 */ #ifndef RDATA_GENERIC_NSEC3PARAM_51_C #define RDATA_GENERIC_NSEC3PARAM_51_C #include #include #define RRTYPE_NSEC3PARAM_ATTRIBUTES (DNS_RDATATYPEATTR_DNSSEC) static isc_result_t fromtext_nsec3param(ARGS_FROMTEXT) { isc_token_t token; unsigned int flags = 0; unsigned char hashalg; REQUIRE(type == dns_rdatatype_nsec3param); UNUSED(type); UNUSED(rdclass); UNUSED(callbacks); UNUSED(origin); UNUSED(options); /* Hash. */ RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string, false)); RETTOK(dns_hashalg_fromtext(&hashalg, &token.value.as_textregion)); RETERR(uint8_tobuffer(hashalg, target)); /* Flags. */ RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number, false)); flags = token.value.as_ulong; if (flags > 255U) { RETTOK(ISC_R_RANGE); } RETERR(uint8_tobuffer(flags, target)); /* Iterations. */ RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number, false)); if (token.value.as_ulong > 0xffffU) { RETTOK(ISC_R_RANGE); } RETERR(uint16_tobuffer(token.value.as_ulong, target)); /* Salt. */ RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string, false)); if (token.value.as_textregion.length > (255 * 2)) { RETTOK(DNS_R_TEXTTOOLONG); } if (strcmp(DNS_AS_STR(token), "-") == 0) { RETERR(uint8_tobuffer(0, target)); } else { RETERR(uint8_tobuffer(strlen(DNS_AS_STR(token)) / 2, target)); RETERR(isc_hex_decodestring(DNS_AS_STR(token), target)); } return (ISC_R_SUCCESS); } static isc_result_t totext_nsec3param(ARGS_TOTEXT) { isc_region_t sr; unsigned int i, j; unsigned char hash; unsigned char flags; char buf[sizeof("65535 ")]; uint32_t iterations; REQUIRE(rdata->type == dns_rdatatype_nsec3param); REQUIRE(rdata->length != 0); UNUSED(tctx); dns_rdata_toregion(rdata, &sr); hash = uint8_fromregion(&sr); isc_region_consume(&sr, 1); flags = uint8_fromregion(&sr); isc_region_consume(&sr, 1); iterations = uint16_fromregion(&sr); isc_region_consume(&sr, 2); snprintf(buf, sizeof(buf), "%u ", hash); RETERR(str_totext(buf, target)); snprintf(buf, sizeof(buf), "%u ", flags); RETERR(str_totext(buf, target)); snprintf(buf, sizeof(buf), "%u ", iterations); RETERR(str_totext(buf, target)); j = uint8_fromregion(&sr); isc_region_consume(&sr, 1); INSIST(j <= sr.length); if (j != 0) { i = sr.length; sr.length = j; RETERR(isc_hex_totext(&sr, 1, "", target)); sr.length = i - j; } else { RETERR(str_totext("-", target)); } return (ISC_R_SUCCESS); } static isc_result_t fromwire_nsec3param(ARGS_FROMWIRE) { isc_region_t sr, rr; unsigned int saltlen; REQUIRE(type == dns_rdatatype_nsec3param); UNUSED(type); UNUSED(rdclass); UNUSED(options); UNUSED(dctx); isc_buffer_activeregion(source, &sr); rr = sr; /* hash(1), flags(1), iterations(2), saltlen(1) */ if (sr.length < 5U) { RETERR(DNS_R_FORMERR); } saltlen = sr.base[4]; isc_region_consume(&sr, 5); if (sr.length != saltlen) { RETERR(DNS_R_FORMERR); } isc_region_consume(&sr, saltlen); RETERR(mem_tobuffer(target, rr.base, rr.length)); isc_buffer_forward(source, rr.length); return (ISC_R_SUCCESS); } static isc_result_t towire_nsec3param(ARGS_TOWIRE) { isc_region_t sr; REQUIRE(rdata->type == dns_rdatatype_nsec3param); REQUIRE(rdata->length != 0); UNUSED(cctx); dns_rdata_toregion(rdata, &sr); return (mem_tobuffer(target, sr.base, sr.length)); } static int compare_nsec3param(ARGS_COMPARE) { isc_region_t r1; isc_region_t r2; REQUIRE(rdata1->type == rdata2->type); REQUIRE(rdata1->rdclass == rdata2->rdclass); REQUIRE(rdata1->type == dns_rdatatype_nsec3param); REQUIRE(rdata1->length != 0); REQUIRE(rdata2->length != 0); dns_rdata_toregion(rdata1, &r1); dns_rdata_toregion(rdata2, &r2); return (isc_region_compare(&r1, &r2)); } static isc_result_t fromstruct_nsec3param(ARGS_FROMSTRUCT) { dns_rdata_nsec3param_t *nsec3param = source; REQUIRE(type == dns_rdatatype_nsec3param); REQUIRE(nsec3param != NULL); REQUIRE(nsec3param->common.rdtype == type); REQUIRE(nsec3param->common.rdclass == rdclass); UNUSED(type); UNUSED(rdclass); RETERR(uint8_tobuffer(nsec3param->hash, target)); RETERR(uint8_tobuffer(nsec3param->flags, target)); RETERR(uint16_tobuffer(nsec3param->iterations, target)); RETERR(uint8_tobuffer(nsec3param->salt_length, target)); RETERR(mem_tobuffer(target, nsec3param->salt, nsec3param->salt_length)); return (ISC_R_SUCCESS); } static isc_result_t tostruct_nsec3param(ARGS_TOSTRUCT) { isc_region_t region; dns_rdata_nsec3param_t *nsec3param = target; REQUIRE(rdata->type == dns_rdatatype_nsec3param); REQUIRE(nsec3param != NULL); REQUIRE(rdata->length != 0); nsec3param->common.rdclass = rdata->rdclass; nsec3param->common.rdtype = rdata->type; ISC_LINK_INIT(&nsec3param->common, link); region.base = rdata->data; region.length = rdata->length; nsec3param->hash = uint8_consume_fromregion(®ion); nsec3param->flags = uint8_consume_fromregion(®ion); nsec3param->iterations = uint16_consume_fromregion(®ion); nsec3param->salt_length = uint8_consume_fromregion(®ion); INSIST(nsec3param->salt_length == region.length); nsec3param->salt = mem_maybedup(mctx, region.base, nsec3param->salt_length); if (nsec3param->salt == NULL) { return (ISC_R_NOMEMORY); } isc_region_consume(®ion, nsec3param->salt_length); nsec3param->mctx = mctx; return (ISC_R_SUCCESS); } static void freestruct_nsec3param(ARGS_FREESTRUCT) { dns_rdata_nsec3param_t *nsec3param = source; REQUIRE(nsec3param != NULL); REQUIRE(nsec3param->common.rdtype == dns_rdatatype_nsec3param); if (nsec3param->mctx == NULL) { return; } if (nsec3param->salt != NULL) { isc_mem_free(nsec3param->mctx, nsec3param->salt); } nsec3param->mctx = NULL; } static isc_result_t additionaldata_nsec3param(ARGS_ADDLDATA) { REQUIRE(rdata->type == dns_rdatatype_nsec3param); UNUSED(rdata); UNUSED(owner); UNUSED(add); UNUSED(arg); return (ISC_R_SUCCESS); } static isc_result_t digest_nsec3param(ARGS_DIGEST) { isc_region_t r; REQUIRE(rdata->type == dns_rdatatype_nsec3param); dns_rdata_toregion(rdata, &r); return ((digest)(arg, &r)); } static bool checkowner_nsec3param(ARGS_CHECKOWNER) { REQUIRE(type == dns_rdatatype_nsec3param); UNUSED(name); UNUSED(type); UNUSED(rdclass); UNUSED(wildcard); return (true); } static bool checknames_nsec3param(ARGS_CHECKNAMES) { REQUIRE(rdata->type == dns_rdatatype_nsec3param); UNUSED(rdata); UNUSED(owner); UNUSED(bad); return (true); } static int casecompare_nsec3param(ARGS_COMPARE) { return (compare_nsec3param(rdata1, rdata2)); } #endif /* RDATA_GENERIC_NSEC3PARAM_51_C */