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-rw-r--r--lib/dnssec.c601
1 files changed, 601 insertions, 0 deletions
diff --git a/lib/dnssec.c b/lib/dnssec.c
new file mode 100644
index 0000000..d6ae3cc
--- /dev/null
+++ b/lib/dnssec.c
@@ -0,0 +1,601 @@
+/* Copyright (C) CZ.NIC, z.s.p.o. <knot-resolver@labs.nic.cz>
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include <libdnssec/binary.h>
+#include <libdnssec/crypto.h>
+#include <libdnssec/error.h>
+#include <libdnssec/key.h>
+#include <libdnssec/sign.h>
+#include <libknot/descriptor.h>
+#include <libknot/packet/wire.h>
+#include <libknot/rdataset.h>
+#include <libknot/rrset.h>
+#include <libknot/rrtype/dnskey.h>
+#include <libknot/rrtype/nsec.h>
+#include <libknot/rrtype/rrsig.h>
+
+#include "contrib/cleanup.h"
+#include "lib/defines.h"
+#include "lib/dnssec/nsec.h"
+#include "lib/dnssec/nsec3.h"
+#include "lib/dnssec/signature.h"
+#include "lib/dnssec.h"
+#include "lib/resolve.h"
+
+/* forward */
+static int kr_rrset_validate_with_key(kr_rrset_validation_ctx_t *vctx,
+ knot_rrset_t *covered, size_t key_pos, const struct dnssec_key *key);
+
+void kr_crypto_init(void)
+{
+ dnssec_crypto_init();
+}
+
+void kr_crypto_cleanup(void)
+{
+ dnssec_crypto_cleanup();
+}
+
+void kr_crypto_reinit(void)
+{
+ dnssec_crypto_reinit();
+}
+
+#define FLG_WILDCARD_EXPANSION 0x01 /**< Possibly generated by using wildcard expansion. */
+
+/**
+ * Check the RRSIG RR validity according to RFC4035 5.3.1 .
+ * @param flags The flags are going to be set according to validation result.
+ * @param cov_labels Covered RRSet owner label count.
+ * @param rrsigs rdata containing the signatures.
+ * @param key_alg DNSKEY's algorithm.
+ * @param keytag Used key tag.
+ * @param vctx->zone_name The name of the zone cut (and the DNSKEY).
+ * @param vctx->timestamp Validation time.
+ */
+static int validate_rrsig_rr(int *flags, int cov_labels,
+ const knot_rdata_t *rrsigs,
+ uint8_t key_alg,
+ uint16_t keytag,
+ kr_rrset_validation_ctx_t *vctx)
+{
+ if (kr_fails_assert(flags && rrsigs && vctx && vctx->zone_name)) {
+ return kr_error(EINVAL);
+ }
+ /* bullet 5 */
+ if (knot_rrsig_sig_expiration(rrsigs) < vctx->timestamp) {
+ vctx->rrs_counters.expired++;
+ return kr_error(EINVAL);
+ }
+ /* bullet 6 */
+ if (knot_rrsig_sig_inception(rrsigs) > vctx->timestamp) {
+ vctx->rrs_counters.notyet++;
+ return kr_error(EINVAL);
+ }
+ /* bullet 2 */
+ const knot_dname_t *signer_name = knot_rrsig_signer_name(rrsigs);
+ if (!signer_name || !knot_dname_is_equal(signer_name, vctx->zone_name)) {
+ vctx->rrs_counters.signer_invalid++;
+ return kr_error(EAGAIN);
+ }
+ /* bullet 4 */
+ {
+ int rrsig_labels = knot_rrsig_labels(rrsigs);
+ if (rrsig_labels > cov_labels) {
+ vctx->rrs_counters.labels_invalid++;
+ return kr_error(EINVAL);
+ }
+ if (rrsig_labels < cov_labels) {
+ *flags |= FLG_WILDCARD_EXPANSION;
+ }
+ }
+
+ /* bullet 7
+ * Part checked elsewhere: key owner matching the zone_name. */
+ if (key_alg != knot_rrsig_alg(rrsigs) || keytag != knot_rrsig_key_tag(rrsigs)) {
+ vctx->rrs_counters.key_invalid++;
+ return kr_error(EINVAL);
+ }
+ /* bullet 8 */
+ /* Checked somewhere else. */
+ /* bullet 9 and 10 */
+ /* One of the requirements should be always fulfilled. */
+
+ return kr_ok();
+}
+
+/**
+ * Returns the number of labels that have been added by wildcard expansion.
+ * @param expanded Expanded wildcard.
+ * @param rrsigs RRSet containing the signatures.
+ * @param sig_pos Specifies the signature within the RRSIG RRSet.
+ * @return Number of added labels, -1 on error.
+ */
+static inline int wildcard_radix_len_diff(const knot_dname_t *expanded,
+ const knot_rdata_t *rrsig)
+{
+ if (!expanded || !rrsig) {
+ return -1;
+ }
+
+ return knot_dname_labels(expanded, NULL) - knot_rrsig_labels(rrsig);
+}
+
+int kr_rrset_validate(kr_rrset_validation_ctx_t *vctx, knot_rrset_t *covered)
+{
+ if (!vctx) {
+ return kr_error(EINVAL);
+ }
+ if (!vctx->pkt || !covered || !vctx->keys || !vctx->zone_name) {
+ return kr_error(EINVAL);
+ }
+
+ memset(&vctx->rrs_counters, 0, sizeof(vctx->rrs_counters));
+ for (unsigned i = 0; i < vctx->keys->rrs.count; ++i) {
+ int ret = kr_rrset_validate_with_key(vctx, covered, i, NULL);
+ if (ret == 0) {
+ return ret;
+ }
+ }
+
+ return kr_error(ENOENT);
+}
+
+/** Assuming `rrs` was validated with `sig`, trim its TTL in case it's over-extended. */
+static bool trim_ttl(knot_rrset_t *rrs, const knot_rdata_t *sig,
+ const kr_rrset_validation_ctx_t *vctx)
+{
+ /* The trimming logic is a bit complicated.
+ *
+ * We respect configured ttl_min over the (signed) original TTL,
+ * but we very much want to avoid TTLs over signature expiration,
+ * as that could cause serious issues with downstream validators.
+ */
+ const uint32_t ttl_max = MIN(
+ MAX(knot_rrsig_original_ttl(sig), vctx->ttl_min),
+ knot_rrsig_sig_expiration(sig) - vctx->timestamp
+ );
+ if (likely(rrs->ttl <= ttl_max))
+ return false;
+ if (kr_log_is_debug_qry(VALIDATOR, vctx->log_qry)) {
+ auto_free char *name_str = kr_dname_text(rrs->owner),
+ *type_str = kr_rrtype_text(rrs->type);
+ kr_log_q(vctx->log_qry, VALIDATOR, "trimming TTL of %s %s: %d -> %d\n",
+ name_str, type_str, (int)rrs->ttl, (int)ttl_max);
+ }
+ rrs->ttl = ttl_max;
+ return true;
+}
+
+
+typedef struct {
+ struct dnssec_key *key;
+ uint8_t alg;
+ uint16_t tag;
+} kr_svldr_key_t;
+
+struct kr_svldr_ctx {
+ kr_rrset_validation_ctx_t vctx;
+ array_t(kr_svldr_key_t) keys; // owned(malloc), also insides via svldr_key_*
+};
+
+static int svldr_key_new(const knot_rdata_t *rdata, const knot_dname_t *owner,
+ kr_svldr_key_t *result)
+{
+ result->alg = knot_dnskey_alg(rdata);
+ result->key = NULL; // just silence analyzers
+ int ret = kr_dnssec_key_from_rdata(&result->key, owner, rdata->data, rdata->len);
+ if (likely(ret == 0))
+ result->tag = dnssec_key_get_keytag(result->key);
+ return ret;
+}
+static inline void svldr_key_del(kr_svldr_key_t *skey)
+{
+ kr_dnssec_key_free(&skey->key);
+}
+
+void kr_svldr_free_ctx(struct kr_svldr_ctx *ctx)
+{
+ if (!ctx) return;
+ for (ssize_t i = 0; i < ctx->keys.len; ++i)
+ svldr_key_del(&ctx->keys.at[i]);
+ array_clear(ctx->keys);
+ free_const(ctx->vctx.zone_name);
+ free(ctx);
+}
+struct kr_svldr_ctx * kr_svldr_new_ctx(const knot_rrset_t *ds, knot_rrset_t *dnskey,
+ const knot_rdataset_t *dnskey_sigs, uint32_t timestamp,
+ kr_rrset_validation_ctx_t *err_ctx)
+{
+ // Basic init.
+ struct kr_svldr_ctx *ctx = calloc(1, sizeof(*ctx));
+ if (unlikely(!ctx))
+ return NULL;
+ ctx->vctx.timestamp = timestamp; // .ttl_min is implicitly zero
+ ctx->vctx.zone_name = knot_dname_copy(ds->owner, NULL);
+ if (unlikely(!ctx->vctx.zone_name))
+ goto fail;
+ // Validate the DNSKEY set.
+ ctx->vctx.keys = dnskey;
+ if (kr_dnskeys_trusted(&ctx->vctx, dnskey_sigs, ds) != 0)
+ goto fail;
+ // Put usable DNSKEYs into ctx->keys. (Some duplication of work happens, but OK.)
+ array_init(ctx->keys);
+ array_reserve(ctx->keys, dnskey->rrs.count);
+ knot_rdata_t *krr = dnskey->rrs.rdata;
+ for (int i = 0; i < dnskey->rrs.count; ++i, krr = knot_rdataset_next(krr)) {
+ if (!kr_dnssec_key_zsk(krr->data) || kr_dnssec_key_revoked(krr->data))
+ continue; // key not usable for this
+ kr_svldr_key_t key;
+ if (unlikely(svldr_key_new(krr, NULL/*seems OK here*/, &key) != 0))
+ goto fail;
+ array_push(ctx->keys, key);
+ }
+ return ctx;
+fail:
+ if (err_ctx)
+ memcpy(err_ctx, &ctx->vctx, sizeof(*err_ctx));
+ kr_svldr_free_ctx(ctx);
+ return NULL;
+}
+
+static int kr_svldr_rrset_with_key(knot_rrset_t *rrs, const knot_rdataset_t *rrsigs,
+ kr_rrset_validation_ctx_t *vctx, const kr_svldr_key_t *key)
+{
+ const int covered_labels = knot_dname_labels(rrs->owner, NULL)
+ - knot_dname_is_wildcard(rrs->owner);
+ knot_rdata_t *rdata_j = rrsigs->rdata;
+ for (uint16_t j = 0; j < rrsigs->count; ++j, rdata_j = knot_rdataset_next(rdata_j)) {
+ if (kr_fails_assert(knot_rrsig_type_covered(rdata_j) == rrs->type))
+ continue; //^^ not a problem but no reason to allow them in the API
+ int val_flgs = 0;
+ int retv = validate_rrsig_rr(&val_flgs, covered_labels, rdata_j,
+ key->alg, key->tag, vctx);
+ if (retv == kr_error(EAGAIN)) {
+ vctx->result = retv;
+ return vctx->result;
+ } else if (retv != 0) {
+ continue;
+ }
+ // We only expect non-expanded wildcard records in input;
+ // that also means we don't need to perform non-existence proofs.
+ const int trim_labels = (val_flgs & FLG_WILDCARD_EXPANSION) ? 1 : 0;
+ if (kr_check_signature(rdata_j, key->key, rrs, trim_labels) == 0) {
+ trim_ttl(rrs, rdata_j, vctx);
+ vctx->result = kr_ok();
+ return vctx->result;
+ } else {
+ vctx->rrs_counters.crypto_invalid++;
+ }
+ }
+ vctx->result = kr_error(ENOENT);
+ return vctx->result;
+}
+/* The implementation basically performs "parts of" kr_rrset_validate(). */
+int kr_svldr_rrset(knot_rrset_t *rrs, const knot_rdataset_t *rrsigs,
+ struct kr_svldr_ctx *ctx)
+{
+ if (knot_dname_in_bailiwick(rrs->owner, ctx->vctx.zone_name) < 0) {
+ ctx->vctx.result = kr_error(EAGAIN);
+ return ctx->vctx.result;
+ }
+ for (ssize_t i = 0; i < ctx->keys.len; ++i) {
+ kr_svldr_rrset_with_key(rrs, rrsigs, &ctx->vctx, &ctx->keys.at[i]);
+ if (ctx->vctx.result == 0)
+ break;
+ }
+ return ctx->vctx.result;
+}
+
+
+/**
+ * Validate RRSet using a specific key.
+ * @param vctx Pointer to validation context.
+ * @param covered RRSet covered by a signature. It must be in canonical format.
+ * TTL may get lowered.
+ * @param key_pos Position of the key to be validated with.
+ * @param key Key to be used to validate.
+ * If NULL, then key from DNSKEY RRSet is used.
+ * @return 0 or error code, same as vctx->result.
+ */
+static int kr_rrset_validate_with_key(kr_rrset_validation_ctx_t *vctx,
+ knot_rrset_t *covered,
+ size_t key_pos, const struct dnssec_key *key)
+{
+ const knot_pkt_t *pkt = vctx->pkt;
+ const knot_rrset_t *keys = vctx->keys;
+ const knot_dname_t *zone_name = vctx->zone_name;
+ bool has_nsec3 = vctx->has_nsec3;
+ struct dnssec_key *created_key = NULL;
+
+ if (!knot_dname_is_equal(keys->owner, zone_name)
+ /* It's just caller's approximation that the RR is in that particular zone,
+ * so we verify that in the following condition.
+ * We MUST guard against attempts of zones signing out-of-bailiwick records. */
+ || knot_dname_in_bailiwick(covered->owner, zone_name) < 0) {
+ vctx->result = kr_error(ENOENT);
+ return vctx->result;
+ }
+
+ const knot_rdata_t *key_rdata = knot_rdataset_at(&keys->rrs, key_pos);
+ if (key == NULL) {
+ int ret = kr_dnssec_key_from_rdata(&created_key, keys->owner,
+ key_rdata->data, key_rdata->len);
+ if (ret != 0) {
+ vctx->result = ret;
+ return vctx->result;
+ }
+ key = created_key;
+ }
+ uint16_t keytag = dnssec_key_get_keytag(key);
+ const uint8_t key_alg = knot_dnskey_alg(key_rdata);
+ /* The asterisk does not count, RFC4034 3.1.3, paragraph 3. */
+ const int covered_labels = knot_dname_labels(covered->owner, NULL)
+ - knot_dname_is_wildcard(covered->owner);
+
+ for (uint16_t i = 0; i < vctx->rrs->len; ++i) {
+ /* Consider every RRSIG that matches and comes from the same query. */
+ const knot_rrset_t *rrsig = vctx->rrs->at[i]->rr;
+ const bool ok = vctx->rrs->at[i]->qry_uid == vctx->qry_uid
+ && rrsig->type == KNOT_RRTYPE_RRSIG
+ && rrsig->rclass == covered->rclass
+ && knot_dname_is_equal(rrsig->owner, covered->owner);
+ if (!ok)
+ continue;
+
+ knot_rdata_t *rdata_j = rrsig->rrs.rdata;
+ for (uint16_t j = 0; j < rrsig->rrs.count; ++j, rdata_j = knot_rdataset_next(rdata_j)) {
+ int val_flgs = 0;
+ int trim_labels = 0;
+ if (knot_rrsig_type_covered(rdata_j) != covered->type) {
+ continue;
+ }
+ kr_rank_set(&vctx->rrs->at[i]->rank, KR_RANK_BOGUS); /* defensive style */
+ vctx->rrs_counters.matching_name_type++;
+ int retv = validate_rrsig_rr(&val_flgs, covered_labels, rdata_j,
+ key_alg, keytag, vctx);
+ if (retv == kr_error(EAGAIN)) {
+ kr_dnssec_key_free(&created_key);
+ vctx->result = retv;
+ return retv;
+ } else if (retv != 0) {
+ continue;
+ }
+ if (val_flgs & FLG_WILDCARD_EXPANSION) {
+ trim_labels = wildcard_radix_len_diff(covered->owner, rdata_j);
+ if (trim_labels < 0) {
+ break;
+ }
+ }
+ if (kr_check_signature(rdata_j, key, covered, trim_labels) != 0) {
+ vctx->rrs_counters.crypto_invalid++;
+ continue;
+ }
+ if (val_flgs & FLG_WILDCARD_EXPANSION) {
+ int ret = 0;
+ if (!has_nsec3) {
+ ret = kr_nsec_wildcard_answer_response_check(pkt, KNOT_AUTHORITY, covered->owner);
+ } else {
+ ret = kr_nsec3_wildcard_answer_response_check(pkt, KNOT_AUTHORITY, covered->owner, trim_labels - 1);
+ if (ret == kr_error(KNOT_ERANGE)) {
+ ret = 0;
+ vctx->flags |= KR_DNSSEC_VFLG_OPTOUT;
+ }
+ }
+ if (ret != 0) {
+ vctx->rrs_counters.nsec_invalid++;
+ continue;
+ }
+ vctx->flags |= KR_DNSSEC_VFLG_WEXPAND;
+ }
+
+ trim_ttl(covered, rdata_j, vctx);
+
+ kr_dnssec_key_free(&created_key);
+ vctx->result = kr_ok();
+ kr_rank_set(&vctx->rrs->at[i]->rank, KR_RANK_SECURE); /* upgrade from bogus */
+ return vctx->result;
+ }
+ }
+ /* No applicable key found, cannot be validated. */
+ kr_dnssec_key_free(&created_key);
+ vctx->result = kr_error(ENOENT);
+ return vctx->result;
+}
+
+bool kr_ds_algo_support(const knot_rrset_t *ta)
+{
+ if (kr_fails_assert(ta && ta->type == KNOT_RRTYPE_DS && ta->rclass == KNOT_CLASS_IN))
+ return false;
+ /* Check if at least one DS has a usable algorithm pair. */
+ knot_rdata_t *rdata_i = ta->rrs.rdata;
+ for (uint16_t i = 0; i < ta->rrs.count;
+ ++i, rdata_i = knot_rdataset_next(rdata_i)) {
+ if (dnssec_algorithm_digest_support(knot_ds_digest_type(rdata_i))
+ && dnssec_algorithm_key_support(knot_ds_alg(rdata_i))) {
+ return true;
+ }
+ }
+ return false;
+}
+
+int kr_dnskeys_trusted(kr_rrset_validation_ctx_t *vctx, const knot_rdataset_t *sigs,
+ const knot_rrset_t *ta)
+{
+ knot_rrset_t *keys = vctx->keys;
+ const bool ok = keys && ta && ta->rrs.count && ta->rrs.rdata
+ && ta->type == KNOT_RRTYPE_DS
+ && knot_dname_is_equal(ta->owner, keys->owner);
+ if (kr_fails_assert(ok))
+ return kr_error(EINVAL);
+
+ /* RFC4035 5.2, bullet 1
+ * The supplied DS record has been authenticated.
+ * It has been validated or is part of a configured trust anchor.
+ */
+ knot_rdata_t *krr = keys->rrs.rdata;
+ for (int i = 0; i < keys->rrs.count; ++i, krr = knot_rdataset_next(krr)) {
+ /* RFC4035 5.3.1, bullet 8 */ /* ZSK */
+ if (!kr_dnssec_key_zsk(krr->data) || kr_dnssec_key_revoked(krr->data))
+ continue;
+
+ kr_svldr_key_t key;
+ if (svldr_key_new(krr, keys->owner, &key) != 0)
+ continue; // it might e.g. be malformed
+
+ int ret = kr_authenticate_referral(ta, key.key);
+ if (ret == 0)
+ ret = kr_svldr_rrset_with_key(keys, sigs, vctx, &key);
+ svldr_key_del(&key);
+ if (ret == 0) {
+ kr_assert(vctx->result == 0);
+ return vctx->result;
+ }
+ }
+
+ /* No useable key found */
+ vctx->result = kr_error(ENOENT);
+ return vctx->result;
+}
+
+bool kr_dnssec_key_zsk(const uint8_t *dnskey_rdata)
+{
+ return knot_wire_read_u16(dnskey_rdata) & 0x0100;
+}
+
+bool kr_dnssec_key_ksk(const uint8_t *dnskey_rdata)
+{
+ return knot_wire_read_u16(dnskey_rdata) & 0x0001;
+}
+
+/** Return true if the DNSKEY is revoked. */
+bool kr_dnssec_key_revoked(const uint8_t *dnskey_rdata)
+{
+ return knot_wire_read_u16(dnskey_rdata) & 0x0080;
+}
+
+int kr_dnssec_key_tag(uint16_t rrtype, const uint8_t *rdata, size_t rdlen)
+{
+ if (!rdata || rdlen == 0 || (rrtype != KNOT_RRTYPE_DS && rrtype != KNOT_RRTYPE_DNSKEY)) {
+ return kr_error(EINVAL);
+ }
+ if (rrtype == KNOT_RRTYPE_DS) {
+ return knot_wire_read_u16(rdata);
+ } else if (rrtype == KNOT_RRTYPE_DNSKEY) {
+ struct dnssec_key *key = NULL;
+ int ret = kr_dnssec_key_from_rdata(&key, NULL, rdata, rdlen);
+ if (ret != 0) {
+ return ret;
+ }
+ uint16_t keytag = dnssec_key_get_keytag(key);
+ kr_dnssec_key_free(&key);
+ return keytag;
+ } else {
+ return kr_error(EINVAL);
+ }
+}
+
+int kr_dnssec_key_match(const uint8_t *key_a_rdata, size_t key_a_rdlen,
+ const uint8_t *key_b_rdata, size_t key_b_rdlen)
+{
+ dnssec_key_t *key_a = NULL, *key_b = NULL;
+ int ret = kr_dnssec_key_from_rdata(&key_a, NULL, key_a_rdata, key_a_rdlen);
+ if (ret != 0) {
+ return ret;
+ }
+ ret = kr_dnssec_key_from_rdata(&key_b, NULL, key_b_rdata, key_b_rdlen);
+ if (ret != 0) {
+ dnssec_key_free(key_a);
+ return ret;
+ }
+ /* If the algorithm and the public key match, we can be sure
+ * that they are the same key. */
+ ret = kr_error(ENOENT);
+ dnssec_binary_t pk_a, pk_b;
+ if (dnssec_key_get_algorithm(key_a) == dnssec_key_get_algorithm(key_b) &&
+ dnssec_key_get_pubkey(key_a, &pk_a) == DNSSEC_EOK &&
+ dnssec_key_get_pubkey(key_b, &pk_b) == DNSSEC_EOK) {
+ if (pk_a.size == pk_b.size && memcmp(pk_a.data, pk_b.data, pk_a.size) == 0) {
+ ret = 0;
+ }
+ }
+ dnssec_key_free(key_a);
+ dnssec_key_free(key_b);
+ return ret;
+}
+
+int kr_dnssec_key_from_rdata(struct dnssec_key **key, const knot_dname_t *kown, const uint8_t *rdata, size_t rdlen)
+{
+ if (!key || !rdata || rdlen == 0) {
+ return kr_error(EINVAL);
+ }
+
+ dnssec_key_t *new_key = NULL;
+ const dnssec_binary_t binary_key = {
+ .size = rdlen,
+ .data = (uint8_t *)rdata
+ };
+
+ int ret = dnssec_key_new(&new_key);
+ if (ret != DNSSEC_EOK) {
+ return kr_error(ENOMEM);
+ }
+ ret = dnssec_key_set_rdata(new_key, &binary_key);
+ if (ret != DNSSEC_EOK) {
+ dnssec_key_free(new_key);
+ return kr_error(ret);
+ }
+ if (kown) {
+ ret = dnssec_key_set_dname(new_key, kown);
+ if (ret != DNSSEC_EOK) {
+ dnssec_key_free(new_key);
+ return kr_error(ENOMEM);
+ }
+ }
+
+ *key = new_key;
+ return kr_ok();
+}
+
+void kr_dnssec_key_free(struct dnssec_key **key)
+{
+ if (kr_fails_assert(key))
+ return;
+
+ dnssec_key_free(*key);
+ *key = NULL;
+}
+
+int kr_dnssec_matches_name_and_type(const ranked_rr_array_t *rrs, uint32_t qry_uid,
+ const knot_dname_t *name, uint16_t type)
+{
+ int ret = kr_error(ENOENT);
+ for (size_t i = 0; i < rrs->len; ++i) {
+ const ranked_rr_array_entry_t *entry = rrs->at[i];
+ if (kr_fails_assert(!entry->in_progress))
+ return kr_error(EINVAL);
+ const knot_rrset_t *nsec = entry->rr;
+ if (entry->qry_uid != qry_uid || entry->yielded) {
+ continue;
+ }
+ if (nsec->type != KNOT_RRTYPE_NSEC &&
+ nsec->type != KNOT_RRTYPE_NSEC3) {
+ continue;
+ }
+ if (!kr_rank_test(entry->rank, KR_RANK_SECURE)) {
+ continue;
+ }
+ if (nsec->type == KNOT_RRTYPE_NSEC) {
+ ret = kr_nsec_matches_name_and_type(nsec, name, type);
+ } else {
+ ret = kr_nsec3_matches_name_and_type(nsec, name, type);
+ }
+ if (ret == kr_ok()) {
+ return kr_ok();
+ } else if (ret != kr_error(ENOENT)) {
+ return ret;
+ }
+ }
+ return ret;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-07 10:31:32 +0000