/* $NetBSD: zonemd_63.c,v 1.5.2.1 2024/02/25 15:47:06 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. */ /* RFC 8976 */ #ifndef RDATA_GENERIC_ZONEMD_63_C #define RDATA_GENERIC_ZONEMD_63_C #define RRTYPE_ZONEMD_ATTRIBUTES 0 static isc_result_t fromtext_zonemd(ARGS_FROMTEXT) { isc_token_t token; int digest_type, length; isc_buffer_t save; isc_result_t result; UNUSED(type); UNUSED(rdclass); UNUSED(origin); UNUSED(options); UNUSED(callbacks); /* * Zone Serial. */ RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number, false)); RETERR(uint32_tobuffer(token.value.as_ulong, target)); /* * Digest Scheme. */ RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number, false)); RETERR(uint8_tobuffer(token.value.as_ulong, target)); /* * Digest Type. */ RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number, false)); digest_type = token.value.as_ulong; RETERR(uint8_tobuffer(digest_type, target)); /* * Digest. */ switch (digest_type) { case DNS_ZONEMD_DIGEST_SHA384: length = ISC_SHA384_DIGESTLENGTH; break; case DNS_ZONEMD_DIGEST_SHA512: length = ISC_SHA512_DIGESTLENGTH; break; default: length = -2; break; } save = *target; result = isc_hex_tobuffer(lexer, target, length); /* Minimum length of digest is 12 octets. */ if (isc_buffer_usedlength(target) - isc_buffer_usedlength(&save) < 12) { return (ISC_R_UNEXPECTEDEND); } return (result); } static isc_result_t totext_zonemd(ARGS_TOTEXT) { isc_region_t sr; char buf[sizeof("0123456789")]; unsigned long num; REQUIRE(rdata->length > 6); UNUSED(tctx); dns_rdata_toregion(rdata, &sr); /* * Zone Serial. */ num = uint32_fromregion(&sr); isc_region_consume(&sr, 4); snprintf(buf, sizeof(buf), "%lu", num); RETERR(str_totext(buf, target)); RETERR(str_totext(" ", target)); /* * Digest scheme. */ num = uint8_fromregion(&sr); isc_region_consume(&sr, 1); snprintf(buf, sizeof(buf), "%lu", num); RETERR(str_totext(buf, target)); RETERR(str_totext(" ", target)); /* * Digest type. */ num = uint8_fromregion(&sr); isc_region_consume(&sr, 1); snprintf(buf, sizeof(buf), "%lu", num); RETERR(str_totext(buf, target)); /* * Digest. */ if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0) { RETERR(str_totext(" (", target)); } RETERR(str_totext(tctx->linebreak, target)); if ((tctx->flags & DNS_STYLEFLAG_NOCRYPTO) == 0) { if (tctx->width == 0) { /* No splitting */ RETERR(isc_hex_totext(&sr, 0, "", target)); } else { RETERR(isc_hex_totext(&sr, tctx->width - 2, tctx->linebreak, target)); } } else { RETERR(str_totext("[omitted]", target)); } if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0) { RETERR(str_totext(" )", target)); } return (ISC_R_SUCCESS); } static isc_result_t fromwire_zonemd(ARGS_FROMWIRE) { isc_region_t sr; size_t digestlen = 0; UNUSED(type); UNUSED(rdclass); UNUSED(dctx); UNUSED(options); isc_buffer_activeregion(source, &sr); /* * If we do not recognize the digest type, ensure that the digest * meets minimum length (12). * * If we do recognize the digest type, ensure that the digest is of the * correct length. */ if (sr.length < 18) { return (ISC_R_UNEXPECTEDEND); } switch (sr.base[5]) { case DNS_ZONEMD_DIGEST_SHA384: digestlen = ISC_SHA384_DIGESTLENGTH; break; case DNS_ZONEMD_DIGEST_SHA512: digestlen = ISC_SHA512_DIGESTLENGTH; break; default: break; } if (digestlen != 0 && sr.length < 6 + digestlen) { return (ISC_R_UNEXPECTEDEND); } /* * Only specify the number of octets to consume if we recognize the * digest type. * * If there is extra data, dns_rdata_fromwire() will detect that. */ if (digestlen != 0) { sr.length = 6 + digestlen; } isc_buffer_forward(source, sr.length); return (mem_tobuffer(target, sr.base, sr.length)); } static isc_result_t towire_zonemd(ARGS_TOWIRE) { isc_region_t sr; REQUIRE(rdata->type == dns_rdatatype_zonemd); REQUIRE(rdata->length != 0); UNUSED(cctx); dns_rdata_toregion(rdata, &sr); return (mem_tobuffer(target, sr.base, sr.length)); } static int compare_zonemd(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_zonemd); 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_zonemd(ARGS_FROMSTRUCT) { dns_rdata_zonemd_t *zonemd = source; REQUIRE(zonemd != NULL); REQUIRE(zonemd->common.rdtype == type); REQUIRE(zonemd->common.rdclass == rdclass); UNUSED(type); UNUSED(rdclass); switch (zonemd->digest_type) { case DNS_ZONEMD_DIGEST_SHA384: REQUIRE(zonemd->length == ISC_SHA384_DIGESTLENGTH); break; case DNS_ZONEMD_DIGEST_SHA512: REQUIRE(zonemd->length == ISC_SHA512_DIGESTLENGTH); break; } RETERR(uint32_tobuffer(zonemd->serial, target)); RETERR(uint8_tobuffer(zonemd->scheme, target)); RETERR(uint8_tobuffer(zonemd->digest_type, target)); return (mem_tobuffer(target, zonemd->digest, zonemd->length)); } static isc_result_t tostruct_zonemd(ARGS_TOSTRUCT) { dns_rdata_zonemd_t *zonemd = target; isc_region_t region; REQUIRE(rdata->type == dns_rdatatype_zonemd); REQUIRE(zonemd != NULL); REQUIRE(rdata->length != 0); zonemd->common.rdclass = rdata->rdclass; zonemd->common.rdtype = rdata->type; ISC_LINK_INIT(&zonemd->common, link); dns_rdata_toregion(rdata, ®ion); zonemd->serial = uint32_fromregion(®ion); isc_region_consume(®ion, 4); zonemd->scheme = uint8_fromregion(®ion); isc_region_consume(®ion, 1); zonemd->digest_type = uint8_fromregion(®ion); isc_region_consume(®ion, 1); zonemd->length = region.length; zonemd->digest = mem_maybedup(mctx, region.base, region.length); if (zonemd->digest == NULL) { return (ISC_R_NOMEMORY); } zonemd->mctx = mctx; return (ISC_R_SUCCESS); } static void freestruct_zonemd(ARGS_FREESTRUCT) { dns_rdata_zonemd_t *zonemd = source; REQUIRE(zonemd != NULL); REQUIRE(zonemd->common.rdtype == dns_rdatatype_zonemd); if (zonemd->mctx == NULL) { return; } if (zonemd->digest != NULL) { isc_mem_free(zonemd->mctx, zonemd->digest); } zonemd->mctx = NULL; } static isc_result_t additionaldata_zonemd(ARGS_ADDLDATA) { REQUIRE(rdata->type == dns_rdatatype_zonemd); UNUSED(rdata); UNUSED(owner); UNUSED(add); UNUSED(arg); return (ISC_R_SUCCESS); } static isc_result_t digest_zonemd(ARGS_DIGEST) { isc_region_t r; REQUIRE(rdata->type == dns_rdatatype_zonemd); dns_rdata_toregion(rdata, &r); return ((digest)(arg, &r)); } static bool checkowner_zonemd(ARGS_CHECKOWNER) { REQUIRE(type == dns_rdatatype_zonemd); UNUSED(name); UNUSED(type); UNUSED(rdclass); UNUSED(wildcard); return (true); } static bool checknames_zonemd(ARGS_CHECKNAMES) { REQUIRE(rdata->type == dns_rdatatype_zonemd); UNUSED(rdata); UNUSED(owner); UNUSED(bad); return (true); } static int casecompare_zonemd(ARGS_COMPARE) { return (compare_zonemd(rdata1, rdata2)); } #endif /* RDATA_GENERIC_ZONEMD_63_C */