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-rw-r--r--lib/dns/rdata/generic/zonemd_63.c350
1 files changed, 350 insertions, 0 deletions
diff --git a/lib/dns/rdata/generic/zonemd_63.c b/lib/dns/rdata/generic/zonemd_63.c
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+++ b/lib/dns/rdata/generic/zonemd_63.c
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+/*
+ * 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, &region);
+
+ zonemd->serial = uint32_fromregion(&region);
+ isc_region_consume(&region, 4);
+ zonemd->scheme = uint8_fromregion(&region);
+ isc_region_consume(&region, 1);
+ zonemd->digest_type = uint8_fromregion(&region);
+ isc_region_consume(&region, 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(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 */