diff options
Diffstat (limited to 'lib/dns/rdata/generic/zonemd_63.c')
| -rw-r--r-- | lib/dns/rdata/generic/zonemd_63.c | 351 |
1 files changed, 351 insertions, 0 deletions
diff --git a/lib/dns/rdata/generic/zonemd_63.c b/lib/dns/rdata/generic/zonemd_63.c new file mode 100644 index 0000000..1bf9573 --- /dev/null +++ b/lib/dns/rdata/generic/zonemd_63.c @@ -0,0 +1,351 @@ +/* + * 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 */ |