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-rw-r--r--lib/dns/rdata/generic/nsec3_50.c424
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diff --git a/lib/dns/rdata/generic/nsec3_50.c b/lib/dns/rdata/generic/nsec3_50.c
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+++ b/lib/dns/rdata/generic/nsec3_50.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.
+ */
+
+/*
+ * 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_NSEC3_50_C
+#define RDATA_GENERIC_NSEC3_50_C
+
+#include <isc/base32.h>
+#include <isc/iterated_hash.h>
+
+#define RRTYPE_NSEC3_ATTRIBUTES DNS_RDATATYPEATTR_DNSSEC
+
+static isc_result_t
+fromtext_nsec3(ARGS_FROMTEXT) {
+ isc_token_t token;
+ unsigned int flags;
+ unsigned char hashalg;
+ isc_buffer_t b;
+ unsigned char buf[256];
+
+ REQUIRE(type == dns_rdatatype_nsec3);
+
+ 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));
+ }
+
+ /*
+ * Next hash a single base32hex word.
+ */
+ RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
+ false));
+ isc_buffer_init(&b, buf, sizeof(buf));
+ RETTOK(isc_base32hexnp_decodestring(DNS_AS_STR(token), &b));
+ if (isc_buffer_usedlength(&b) > 0xffU) {
+ RETTOK(ISC_R_RANGE);
+ }
+ RETERR(uint8_tobuffer(isc_buffer_usedlength(&b), target));
+ RETERR(mem_tobuffer(target, &buf, isc_buffer_usedlength(&b)));
+
+ return (typemap_fromtext(lexer, target, true));
+}
+
+static isc_result_t
+totext_nsec3(ARGS_TOTEXT) {
+ isc_region_t sr;
+ unsigned int i, j;
+ unsigned char hash;
+ unsigned char flags;
+ char buf[sizeof("TYPE65535")];
+ uint32_t iterations;
+
+ REQUIRE(rdata->type == dns_rdatatype_nsec3);
+ REQUIRE(rdata->length != 0);
+
+ dns_rdata_toregion(rdata, &sr);
+
+ /* Hash */
+ hash = uint8_fromregion(&sr);
+ isc_region_consume(&sr, 1);
+ snprintf(buf, sizeof(buf), "%u ", hash);
+ RETERR(str_totext(buf, target));
+
+ /* Flags */
+ flags = uint8_fromregion(&sr);
+ isc_region_consume(&sr, 1);
+ snprintf(buf, sizeof(buf), "%u ", flags);
+ RETERR(str_totext(buf, target));
+
+ /* Iterations */
+ iterations = uint16_fromregion(&sr);
+ isc_region_consume(&sr, 2);
+ snprintf(buf, sizeof(buf), "%u ", iterations);
+ RETERR(str_totext(buf, target));
+
+ /* Salt */
+ 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));
+ }
+
+ if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0) {
+ RETERR(str_totext(" (", target));
+ }
+ RETERR(str_totext(tctx->linebreak, target));
+
+ /* Next hash */
+ j = uint8_fromregion(&sr);
+ isc_region_consume(&sr, 1);
+ INSIST(j <= sr.length);
+
+ i = sr.length;
+ sr.length = j;
+ RETERR(isc_base32hexnp_totext(&sr, 1, "", target));
+ sr.length = i - j;
+
+ /*
+ * Don't leave a trailing space when there's no typemap present.
+ */
+ if (((tctx->flags & DNS_STYLEFLAG_MULTILINE) == 0) && (sr.length > 0)) {
+ RETERR(str_totext(" ", target));
+ }
+ RETERR(typemap_totext(&sr, tctx, target));
+
+ if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0) {
+ RETERR(str_totext(" )", target));
+ }
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+fromwire_nsec3(ARGS_FROMWIRE) {
+ isc_region_t sr, rr;
+ unsigned int saltlen, hashlen;
+
+ REQUIRE(type == dns_rdatatype_nsec3);
+
+ UNUSED(type);
+ UNUSED(rdclass);
+ UNUSED(options);
+ UNUSED(dctx);
+
+ isc_buffer_activeregion(source, &sr);
+ rr = sr;
+
+ /* hash(1), flags(1), iteration(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);
+
+ if (sr.length < 1U) {
+ RETERR(DNS_R_FORMERR);
+ }
+ hashlen = sr.base[0];
+ isc_region_consume(&sr, 1);
+
+ if (hashlen < 1 || sr.length < hashlen) {
+ RETERR(DNS_R_FORMERR);
+ }
+ isc_region_consume(&sr, hashlen);
+
+ RETERR(typemap_test(&sr, true));
+
+ RETERR(mem_tobuffer(target, rr.base, rr.length));
+ isc_buffer_forward(source, rr.length);
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+towire_nsec3(ARGS_TOWIRE) {
+ isc_region_t sr;
+
+ REQUIRE(rdata->type == dns_rdatatype_nsec3);
+ REQUIRE(rdata->length != 0);
+
+ UNUSED(cctx);
+
+ dns_rdata_toregion(rdata, &sr);
+ return (mem_tobuffer(target, sr.base, sr.length));
+}
+
+static int
+compare_nsec3(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_nsec3);
+ 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_nsec3(ARGS_FROMSTRUCT) {
+ dns_rdata_nsec3_t *nsec3 = source;
+ isc_region_t region;
+
+ REQUIRE(type == dns_rdatatype_nsec3);
+ REQUIRE(nsec3 != NULL);
+ REQUIRE(nsec3->common.rdtype == type);
+ REQUIRE(nsec3->common.rdclass == rdclass);
+ REQUIRE(nsec3->typebits != NULL || nsec3->len == 0);
+ REQUIRE(nsec3->hash == dns_hash_sha1);
+
+ UNUSED(type);
+ UNUSED(rdclass);
+
+ RETERR(uint8_tobuffer(nsec3->hash, target));
+ RETERR(uint8_tobuffer(nsec3->flags, target));
+ RETERR(uint16_tobuffer(nsec3->iterations, target));
+ RETERR(uint8_tobuffer(nsec3->salt_length, target));
+ RETERR(mem_tobuffer(target, nsec3->salt, nsec3->salt_length));
+ RETERR(uint8_tobuffer(nsec3->next_length, target));
+ RETERR(mem_tobuffer(target, nsec3->next, nsec3->next_length));
+
+ region.base = nsec3->typebits;
+ region.length = nsec3->len;
+ RETERR(typemap_test(&region, true));
+ return (mem_tobuffer(target, nsec3->typebits, nsec3->len));
+}
+
+static isc_result_t
+tostruct_nsec3(ARGS_TOSTRUCT) {
+ isc_region_t region;
+ dns_rdata_nsec3_t *nsec3 = target;
+
+ REQUIRE(rdata->type == dns_rdatatype_nsec3);
+ REQUIRE(nsec3 != NULL);
+ REQUIRE(rdata->length != 0);
+
+ nsec3->common.rdclass = rdata->rdclass;
+ nsec3->common.rdtype = rdata->type;
+ ISC_LINK_INIT(&nsec3->common, link);
+
+ region.base = rdata->data;
+ region.length = rdata->length;
+ nsec3->hash = uint8_consume_fromregion(&region);
+ nsec3->flags = uint8_consume_fromregion(&region);
+ nsec3->iterations = uint16_consume_fromregion(&region);
+
+ nsec3->salt_length = uint8_consume_fromregion(&region);
+ INSIST(nsec3->salt_length <= region.length);
+ nsec3->salt = mem_maybedup(mctx, region.base, nsec3->salt_length);
+ if (nsec3->salt == NULL) {
+ return (ISC_R_NOMEMORY);
+ }
+ isc_region_consume(&region, nsec3->salt_length);
+
+ nsec3->next_length = uint8_consume_fromregion(&region);
+ INSIST(nsec3->next_length <= region.length);
+ nsec3->next = mem_maybedup(mctx, region.base, nsec3->next_length);
+ if (nsec3->next == NULL) {
+ goto cleanup;
+ }
+ isc_region_consume(&region, nsec3->next_length);
+
+ nsec3->len = region.length;
+ nsec3->typebits = mem_maybedup(mctx, region.base, region.length);
+ if (nsec3->typebits == NULL) {
+ goto cleanup;
+ }
+
+ nsec3->mctx = mctx;
+ return (ISC_R_SUCCESS);
+
+cleanup:
+ if (nsec3->next != NULL) {
+ isc_mem_free(mctx, nsec3->next);
+ }
+ isc_mem_free(mctx, nsec3->salt);
+ return (ISC_R_NOMEMORY);
+}
+
+static void
+freestruct_nsec3(ARGS_FREESTRUCT) {
+ dns_rdata_nsec3_t *nsec3 = source;
+
+ REQUIRE(nsec3 != NULL);
+ REQUIRE(nsec3->common.rdtype == dns_rdatatype_nsec3);
+
+ if (nsec3->mctx == NULL) {
+ return;
+ }
+
+ if (nsec3->salt != NULL) {
+ isc_mem_free(nsec3->mctx, nsec3->salt);
+ }
+ if (nsec3->next != NULL) {
+ isc_mem_free(nsec3->mctx, nsec3->next);
+ }
+ if (nsec3->typebits != NULL) {
+ isc_mem_free(nsec3->mctx, nsec3->typebits);
+ }
+ nsec3->mctx = NULL;
+}
+
+static isc_result_t
+additionaldata_nsec3(ARGS_ADDLDATA) {
+ REQUIRE(rdata->type == dns_rdatatype_nsec3);
+
+ UNUSED(rdata);
+ UNUSED(add);
+ UNUSED(arg);
+
+ return (ISC_R_SUCCESS);
+}
+
+static isc_result_t
+digest_nsec3(ARGS_DIGEST) {
+ isc_region_t r;
+
+ REQUIRE(rdata->type == dns_rdatatype_nsec3);
+
+ dns_rdata_toregion(rdata, &r);
+ return ((digest)(arg, &r));
+}
+
+static bool
+checkowner_nsec3(ARGS_CHECKOWNER) {
+ unsigned char owner[NSEC3_MAX_HASH_LENGTH];
+ isc_buffer_t buffer;
+ dns_label_t label;
+
+ REQUIRE(type == dns_rdatatype_nsec3);
+
+ UNUSED(type);
+ UNUSED(rdclass);
+ UNUSED(wildcard);
+
+ /*
+ * First label is a base32hex string without padding.
+ */
+ dns_name_getlabel(name, 0, &label);
+ isc_region_consume(&label, 1);
+ isc_buffer_init(&buffer, owner, sizeof(owner));
+ if (isc_base32hexnp_decoderegion(&label, &buffer) == ISC_R_SUCCESS) {
+ return (true);
+ }
+
+ return (false);
+}
+
+static bool
+checknames_nsec3(ARGS_CHECKNAMES) {
+ REQUIRE(rdata->type == dns_rdatatype_nsec3);
+
+ UNUSED(rdata);
+ UNUSED(owner);
+ UNUSED(bad);
+
+ return (true);
+}
+
+static int
+casecompare_nsec3(ARGS_COMPARE) {
+ return (compare_nsec3(rdata1, rdata2));
+}
+
+#endif /* RDATA_GENERIC_NSEC3_50_C */