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-rw-r--r--lib/dns/keytable.c768
1 files changed, 768 insertions, 0 deletions
diff --git a/lib/dns/keytable.c b/lib/dns/keytable.c
new file mode 100644
index 0000000..57b8608
--- /dev/null
+++ b/lib/dns/keytable.c
@@ -0,0 +1,768 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * 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 http://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+
+/*! \file */
+
+#include <config.h>
+
+#include <stdbool.h>
+
+#include <isc/mem.h>
+#include <isc/print.h>
+#include <isc/refcount.h>
+#include <isc/rwlock.h>
+#include <isc/string.h> /* Required for HP/UX (and others?) */
+#include <isc/util.h>
+
+#include <dns/keytable.h>
+#include <dns/fixedname.h>
+#include <dns/rbt.h>
+#include <dns/result.h>
+
+#define KEYTABLE_MAGIC ISC_MAGIC('K', 'T', 'b', 'l')
+#define VALID_KEYTABLE(kt) ISC_MAGIC_VALID(kt, KEYTABLE_MAGIC)
+
+#define KEYNODE_MAGIC ISC_MAGIC('K', 'N', 'o', 'd')
+#define VALID_KEYNODE(kn) ISC_MAGIC_VALID(kn, KEYNODE_MAGIC)
+
+struct dns_keytable {
+ /* Unlocked. */
+ unsigned int magic;
+ isc_mem_t *mctx;
+ isc_refcount_t active_nodes;
+ isc_refcount_t references;
+ isc_rwlock_t rwlock;
+ /* Locked by rwlock. */
+ dns_rbt_t *table;
+};
+
+struct dns_keynode {
+ unsigned int magic;
+ isc_refcount_t refcount;
+ dst_key_t * key;
+ bool managed;
+ struct dns_keynode * next;
+};
+
+static void
+free_keynode(void *node, void *arg) {
+ dns_keynode_t *keynode = node;
+ isc_mem_t *mctx = arg;
+
+ dns_keynode_detachall(mctx, &keynode);
+}
+
+isc_result_t
+dns_keytable_create(isc_mem_t *mctx, dns_keytable_t **keytablep) {
+ dns_keytable_t *keytable;
+ isc_result_t result;
+
+ /*
+ * Create a keytable.
+ */
+
+ REQUIRE(keytablep != NULL && *keytablep == NULL);
+
+ keytable = isc_mem_get(mctx, sizeof(*keytable));
+ if (keytable == NULL) {
+ return (ISC_R_NOMEMORY);
+ }
+
+ keytable->table = NULL;
+ result = dns_rbt_create(mctx, free_keynode, mctx, &keytable->table);
+ if (result != ISC_R_SUCCESS) {
+ goto cleanup_keytable;
+ }
+
+ result = isc_rwlock_init(&keytable->rwlock, 0, 0);
+ if (result != ISC_R_SUCCESS) {
+ goto cleanup_rbt;
+ }
+
+ result = isc_refcount_init(&keytable->active_nodes, 0);
+ if (result != ISC_R_SUCCESS) {
+ goto cleanup_rwlock;
+ }
+
+ result = isc_refcount_init(&keytable->references, 1);
+ if (result != ISC_R_SUCCESS) {
+ goto cleanup_active_nodes;
+ }
+
+ keytable->mctx = NULL;
+ isc_mem_attach(mctx, &keytable->mctx);
+ keytable->magic = KEYTABLE_MAGIC;
+ *keytablep = keytable;
+
+ return (ISC_R_SUCCESS);
+
+ cleanup_active_nodes:
+ isc_refcount_destroy(&keytable->active_nodes);
+
+ cleanup_rwlock:
+ isc_rwlock_destroy(&keytable->rwlock);
+
+ cleanup_rbt:
+ dns_rbt_destroy(&keytable->table);
+
+ cleanup_keytable:
+ isc_mem_putanddetach(&mctx, keytable, sizeof(*keytable));
+
+ return (result);
+}
+
+void
+dns_keytable_attach(dns_keytable_t *source, dns_keytable_t **targetp) {
+
+ /*
+ * Attach *targetp to source.
+ */
+
+ REQUIRE(VALID_KEYTABLE(source));
+ REQUIRE(targetp != NULL && *targetp == NULL);
+
+ isc_refcount_increment(&source->references, NULL);
+
+ *targetp = source;
+}
+
+void
+dns_keytable_detach(dns_keytable_t **keytablep) {
+ dns_keytable_t *keytable;
+ unsigned int refs;
+
+ /*
+ * Detach *keytablep from its keytable.
+ */
+
+ REQUIRE(keytablep != NULL && VALID_KEYTABLE(*keytablep));
+
+ keytable = *keytablep;
+ *keytablep = NULL;
+
+ isc_refcount_decrement(&keytable->references, &refs);
+ if (refs == 0) {
+ INSIST(isc_refcount_current(&keytable->active_nodes) == 0);
+ isc_refcount_destroy(&keytable->active_nodes);
+ isc_refcount_destroy(&keytable->references);
+ dns_rbt_destroy(&keytable->table);
+ isc_rwlock_destroy(&keytable->rwlock);
+ keytable->magic = 0;
+ isc_mem_putanddetach(&keytable->mctx,
+ keytable, sizeof(*keytable));
+ }
+}
+
+static isc_result_t
+insert(dns_keytable_t *keytable, bool managed,
+ dns_name_t *keyname, dst_key_t **keyp)
+{
+ isc_result_t result;
+ dns_keynode_t *knode = NULL;
+ dns_rbtnode_t *node;
+
+ REQUIRE(keyp == NULL || *keyp != NULL);
+ REQUIRE(VALID_KEYTABLE(keytable));
+
+ result = dns_keynode_create(keytable->mctx, &knode);
+ if (result != ISC_R_SUCCESS)
+ return (result);
+
+ knode->managed = managed;
+
+ RWLOCK(&keytable->rwlock, isc_rwlocktype_write);
+
+ node = NULL;
+ result = dns_rbt_addnode(keytable->table, keyname, &node);
+
+ if (keyp != NULL) {
+ if (result == ISC_R_EXISTS) {
+ /* Key already in table? */
+ dns_keynode_t *k;
+ for (k = node->data; k != NULL; k = k->next) {
+ if (k->key == NULL) {
+ k->key = *keyp;
+ *keyp = NULL; /* transfer ownership */
+ break;
+ }
+ if (dst_key_compare(k->key, *keyp) == true)
+ break;
+ }
+
+ if (k == NULL)
+ result = ISC_R_SUCCESS;
+ else if (*keyp != NULL)
+ dst_key_free(keyp);
+ }
+
+ if (result == ISC_R_SUCCESS) {
+ knode->key = *keyp;
+ knode->next = node->data;
+ *keyp = NULL;
+ }
+ }
+
+ if (result == ISC_R_SUCCESS) {
+ node->data = knode;
+ knode = NULL;
+ }
+
+ /* Key was already there? That's the same as a success */
+ if (result == ISC_R_EXISTS)
+ result = ISC_R_SUCCESS;
+
+ RWUNLOCK(&keytable->rwlock, isc_rwlocktype_write);
+
+ if (knode != NULL)
+ dns_keynode_detach(keytable->mctx, &knode);
+
+ return (result);
+}
+
+isc_result_t
+dns_keytable_add(dns_keytable_t *keytable, bool managed,
+ dst_key_t **keyp)
+{
+ REQUIRE(keyp != NULL && *keyp != NULL);
+ return (insert(keytable, managed, dst_key_name(*keyp), keyp));
+}
+
+isc_result_t
+dns_keytable_marksecure(dns_keytable_t *keytable, dns_name_t *name) {
+ return (insert(keytable, true, name, NULL));
+}
+
+isc_result_t
+dns_keytable_delete(dns_keytable_t *keytable, dns_name_t *keyname) {
+ isc_result_t result;
+ dns_rbtnode_t *node = NULL;
+
+ REQUIRE(VALID_KEYTABLE(keytable));
+ REQUIRE(keyname != NULL);
+
+ RWLOCK(&keytable->rwlock, isc_rwlocktype_write);
+ result = dns_rbt_findnode(keytable->table, keyname, NULL, &node, NULL,
+ DNS_RBTFIND_NOOPTIONS, NULL, NULL);
+ if (result == ISC_R_SUCCESS) {
+ if (node->data != NULL)
+ result = dns_rbt_deletenode(keytable->table,
+ node, false);
+ else
+ result = ISC_R_NOTFOUND;
+ } else if (result == DNS_R_PARTIALMATCH)
+ result = ISC_R_NOTFOUND;
+ RWUNLOCK(&keytable->rwlock, isc_rwlocktype_write);
+
+ return (result);
+}
+
+isc_result_t
+dns_keytable_deletekeynode(dns_keytable_t *keytable, dst_key_t *dstkey) {
+ isc_result_t result;
+ dns_name_t *keyname;
+ dns_rbtnode_t *node = NULL;
+ dns_keynode_t *knode = NULL, **kprev = NULL;
+
+ REQUIRE(VALID_KEYTABLE(keytable));
+ REQUIRE(dstkey != NULL);
+
+ keyname = dst_key_name(dstkey);
+
+ RWLOCK(&keytable->rwlock, isc_rwlocktype_write);
+ result = dns_rbt_findnode(keytable->table, keyname, NULL, &node, NULL,
+ DNS_RBTFIND_NOOPTIONS, NULL, NULL);
+
+ if (result == DNS_R_PARTIALMATCH)
+ result = ISC_R_NOTFOUND;
+ if (result != ISC_R_SUCCESS)
+ goto finish;
+
+ if (node->data == NULL) {
+ result = ISC_R_NOTFOUND;
+ goto finish;
+ }
+
+ knode = node->data;
+ if (knode->next == NULL && knode->key != NULL &&
+ dst_key_compare(knode->key, dstkey) == true)
+ {
+ result = dns_rbt_deletenode(keytable->table, node, false);
+ goto finish;
+ }
+
+ kprev = (dns_keynode_t **) &node->data;
+ while (knode != NULL) {
+ if (knode->key != NULL &&
+ dst_key_compare(knode->key, dstkey) == true)
+ break;
+ kprev = &knode->next;
+ knode = knode->next;
+ }
+
+ if (knode != NULL) {
+ if (knode->key != NULL)
+ dst_key_free(&knode->key);
+ /*
+ * This is equivalent to:
+ * dns_keynode_attach(knode->next, &tmp);
+ * dns_keynode_detach(kprev);
+ * dns_keynode_attach(tmp, &kprev);
+ * dns_keynode_detach(&tmp);
+ */
+ *kprev = knode->next;
+ knode->next = NULL;
+ dns_keynode_detach(keytable->mctx, &knode);
+ } else
+ result = DNS_R_PARTIALMATCH;
+ finish:
+ RWUNLOCK(&keytable->rwlock, isc_rwlocktype_write);
+ return (result);
+}
+
+isc_result_t
+dns_keytable_find(dns_keytable_t *keytable, dns_name_t *keyname,
+ dns_keynode_t **keynodep)
+{
+ isc_result_t result;
+ dns_rbtnode_t *node = NULL;
+
+ REQUIRE(VALID_KEYTABLE(keytable));
+ REQUIRE(keyname != NULL);
+ REQUIRE(keynodep != NULL && *keynodep == NULL);
+
+ RWLOCK(&keytable->rwlock, isc_rwlocktype_read);
+ result = dns_rbt_findnode(keytable->table, keyname, NULL, &node, NULL,
+ DNS_RBTFIND_NOOPTIONS, NULL, NULL);
+ if (result == ISC_R_SUCCESS) {
+ if (node->data != NULL) {
+ isc_refcount_increment0(&keytable->active_nodes, NULL);
+ dns_keynode_attach(node->data, keynodep);
+ } else
+ result = ISC_R_NOTFOUND;
+ } else if (result == DNS_R_PARTIALMATCH)
+ result = ISC_R_NOTFOUND;
+ RWUNLOCK(&keytable->rwlock, isc_rwlocktype_read);
+
+ return (result);
+}
+
+isc_result_t
+dns_keytable_nextkeynode(dns_keytable_t *keytable, dns_keynode_t *keynode,
+ dns_keynode_t **nextnodep)
+{
+ /*
+ * Return the next key after 'keynode', regardless of
+ * properties.
+ */
+
+ REQUIRE(VALID_KEYTABLE(keytable));
+ REQUIRE(VALID_KEYNODE(keynode));
+ REQUIRE(nextnodep != NULL && *nextnodep == NULL);
+
+ if (keynode->next == NULL)
+ return (ISC_R_NOTFOUND);
+
+ dns_keynode_attach(keynode->next, nextnodep);
+ isc_refcount_increment(&keytable->active_nodes, NULL);
+
+ return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+dns_keytable_findkeynode(dns_keytable_t *keytable, dns_name_t *name,
+ dns_secalg_t algorithm, dns_keytag_t tag,
+ dns_keynode_t **keynodep)
+{
+ isc_result_t result;
+ dns_keynode_t *knode;
+ void *data;
+
+ /*
+ * Search for a key named 'name', matching 'algorithm' and 'tag' in
+ * 'keytable'.
+ */
+
+ REQUIRE(VALID_KEYTABLE(keytable));
+ REQUIRE(dns_name_isabsolute(name));
+ REQUIRE(keynodep != NULL && *keynodep == NULL);
+
+ RWLOCK(&keytable->rwlock, isc_rwlocktype_read);
+
+ /*
+ * Note we don't want the DNS_R_PARTIALMATCH from dns_rbt_findname()
+ * as that indicates that 'name' was not found.
+ *
+ * DNS_R_PARTIALMATCH indicates that the name was found but we
+ * didn't get a match on algorithm and key id arguments.
+ */
+ knode = NULL;
+ data = NULL;
+ result = dns_rbt_findname(keytable->table, name, 0, NULL, &data);
+
+ if (result == ISC_R_SUCCESS) {
+ INSIST(data != NULL);
+ for (knode = data; knode != NULL; knode = knode->next) {
+ if (knode->key == NULL) {
+ knode = NULL;
+ break;
+ }
+ if (algorithm == dst_key_alg(knode->key)
+ && tag == dst_key_id(knode->key))
+ break;
+ }
+ if (knode != NULL) {
+ isc_refcount_increment0(&keytable->active_nodes, NULL);
+ dns_keynode_attach(knode, keynodep);
+ } else
+ result = DNS_R_PARTIALMATCH;
+ } else if (result == DNS_R_PARTIALMATCH)
+ result = ISC_R_NOTFOUND;
+
+ RWUNLOCK(&keytable->rwlock, isc_rwlocktype_read);
+
+ return (result);
+}
+
+isc_result_t
+dns_keytable_findnextkeynode(dns_keytable_t *keytable, dns_keynode_t *keynode,
+ dns_keynode_t **nextnodep)
+{
+ isc_result_t result;
+ dns_keynode_t *knode;
+
+ /*
+ * Search for the next key with the same properties as 'keynode' in
+ * 'keytable'.
+ */
+
+ REQUIRE(VALID_KEYTABLE(keytable));
+ REQUIRE(VALID_KEYNODE(keynode));
+ REQUIRE(nextnodep != NULL && *nextnodep == NULL);
+
+ for (knode = keynode->next; knode != NULL; knode = knode->next) {
+ if (knode->key == NULL) {
+ knode = NULL;
+ break;
+ }
+ if (dst_key_alg(keynode->key) == dst_key_alg(knode->key) &&
+ dst_key_id(keynode->key) == dst_key_id(knode->key))
+ break;
+ }
+ if (knode != NULL) {
+ isc_refcount_increment(&keytable->active_nodes, NULL);
+ result = ISC_R_SUCCESS;
+ dns_keynode_attach(knode, nextnodep);
+ } else
+ result = ISC_R_NOTFOUND;
+
+ return (result);
+}
+
+isc_result_t
+dns_keytable_finddeepestmatch(dns_keytable_t *keytable, dns_name_t *name,
+ dns_name_t *foundname)
+{
+ isc_result_t result;
+ void *data;
+
+ /*
+ * Search for the deepest match in 'keytable'.
+ */
+
+ REQUIRE(VALID_KEYTABLE(keytable));
+ REQUIRE(dns_name_isabsolute(name));
+ REQUIRE(foundname != NULL);
+
+ RWLOCK(&keytable->rwlock, isc_rwlocktype_read);
+
+ data = NULL;
+ result = dns_rbt_findname(keytable->table, name, 0, foundname, &data);
+
+ if (result == ISC_R_SUCCESS || result == DNS_R_PARTIALMATCH)
+ result = ISC_R_SUCCESS;
+
+ RWUNLOCK(&keytable->rwlock, isc_rwlocktype_read);
+
+ return (result);
+}
+
+void
+dns_keytable_attachkeynode(dns_keytable_t *keytable, dns_keynode_t *source,
+ dns_keynode_t **target)
+{
+ /*
+ * Give back a keynode found via dns_keytable_findkeynode().
+ */
+
+ REQUIRE(VALID_KEYTABLE(keytable));
+ REQUIRE(VALID_KEYNODE(source));
+ REQUIRE(target != NULL && *target == NULL);
+
+ isc_refcount_increment(&keytable->active_nodes, NULL);
+
+ dns_keynode_attach(source, target);
+}
+
+void
+dns_keytable_detachkeynode(dns_keytable_t *keytable, dns_keynode_t **keynodep)
+{
+ /*
+ * Give back a keynode found via dns_keytable_findkeynode().
+ */
+
+ REQUIRE(VALID_KEYTABLE(keytable));
+ REQUIRE(keynodep != NULL && VALID_KEYNODE(*keynodep));
+
+ isc_refcount_decrement(&keytable->active_nodes, NULL);
+ dns_keynode_detach(keytable->mctx, keynodep);
+}
+
+isc_result_t
+dns_keytable_issecuredomain(dns_keytable_t *keytable, dns_name_t *name,
+ dns_name_t *foundname, bool *wantdnssecp)
+{
+ isc_result_t result;
+ dns_rbtnode_t *node = NULL;
+
+ /*
+ * Is 'name' at or beneath a trusted key?
+ */
+
+ REQUIRE(VALID_KEYTABLE(keytable));
+ REQUIRE(dns_name_isabsolute(name));
+ REQUIRE(wantdnssecp != NULL);
+
+ RWLOCK(&keytable->rwlock, isc_rwlocktype_read);
+
+ result = dns_rbt_findnode(keytable->table, name, foundname, &node,
+ NULL, DNS_RBTFIND_NOOPTIONS, NULL, NULL);
+ if (result == ISC_R_SUCCESS || result == DNS_R_PARTIALMATCH) {
+ INSIST(node->data != NULL);
+ *wantdnssecp = true;
+ result = ISC_R_SUCCESS;
+ } else if (result == ISC_R_NOTFOUND) {
+ *wantdnssecp = false;
+ result = ISC_R_SUCCESS;
+ }
+
+ RWUNLOCK(&keytable->rwlock, isc_rwlocktype_read);
+
+ return (result);
+}
+
+static isc_result_t
+putstr(isc_buffer_t **b, const char *str) {
+ isc_result_t result;
+
+ result = isc_buffer_reserve(b, strlen(str));
+ if (result != ISC_R_SUCCESS)
+ return (result);
+
+ isc_buffer_putstr(*b, str);
+ return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+dns_keytable_dump(dns_keytable_t *keytable, FILE *fp) {
+ isc_result_t result;
+ isc_buffer_t *text = NULL;
+
+ REQUIRE(VALID_KEYTABLE(keytable));
+ REQUIRE(fp != NULL);
+
+ result = isc_buffer_allocate(keytable->mctx, &text, 4096);
+ if (result != ISC_R_SUCCESS)
+ return (result);
+
+ result = dns_keytable_totext(keytable, &text);
+
+ if (isc_buffer_usedlength(text) != 0) {
+ (void) putstr(&text, "\n");
+ } else if (result == ISC_R_SUCCESS)
+ (void) putstr(&text, "none");
+ else {
+ (void) putstr(&text, "could not dump key table: ");
+ (void) putstr(&text, isc_result_totext(result));
+ }
+
+ fprintf(fp, "%.*s", (int) isc_buffer_usedlength(text),
+ (char *) isc_buffer_base(text));
+
+ isc_buffer_free(&text);
+ return (result);
+}
+
+isc_result_t
+dns_keytable_totext(dns_keytable_t *keytable, isc_buffer_t **text) {
+ isc_result_t result;
+ dns_keynode_t *knode;
+ dns_rbtnode_t *node;
+ dns_rbtnodechain_t chain;
+
+ REQUIRE(VALID_KEYTABLE(keytable));
+ REQUIRE(text != NULL && *text != NULL);
+
+ RWLOCK(&keytable->rwlock, isc_rwlocktype_read);
+ dns_rbtnodechain_init(&chain, keytable->mctx);
+ result = dns_rbtnodechain_first(&chain, keytable->table, NULL, NULL);
+ if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
+ if (result == ISC_R_NOTFOUND)
+ result = ISC_R_SUCCESS;
+ goto cleanup;
+ }
+ for (;;) {
+ char pbuf[DST_KEY_FORMATSIZE];
+
+ dns_rbtnodechain_current(&chain, NULL, NULL, &node);
+ for (knode = node->data; knode != NULL; knode = knode->next) {
+ char obuf[DNS_NAME_FORMATSIZE + 200];
+ if (knode->key == NULL)
+ continue;
+ dst_key_format(knode->key, pbuf, sizeof(pbuf));
+ snprintf(obuf, sizeof(obuf), "%s ; %s\n", pbuf,
+ knode->managed ? "managed" : "trusted");
+ result = putstr(text, obuf);
+ if (result != ISC_R_SUCCESS)
+ break;
+ }
+ result = dns_rbtnodechain_next(&chain, NULL, NULL);
+ if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
+ if (result == ISC_R_NOMORE)
+ result = ISC_R_SUCCESS;
+ break;
+ }
+ }
+
+ cleanup:
+ dns_rbtnodechain_invalidate(&chain);
+ RWUNLOCK(&keytable->rwlock, isc_rwlocktype_read);
+ return (result);
+}
+
+isc_result_t
+dns_keytable_forall(dns_keytable_t *keytable,
+ void (*func)(dns_keytable_t *, dns_keynode_t *, void *),
+ void *arg)
+{
+ isc_result_t result;
+ dns_rbtnode_t *node;
+ dns_rbtnodechain_t chain;
+
+ REQUIRE(VALID_KEYTABLE(keytable));
+
+ RWLOCK(&keytable->rwlock, isc_rwlocktype_read);
+ dns_rbtnodechain_init(&chain, keytable->mctx);
+ result = dns_rbtnodechain_first(&chain, keytable->table, NULL, NULL);
+ if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
+ if (result == ISC_R_NOTFOUND)
+ result = ISC_R_SUCCESS;
+ goto cleanup;
+ }
+ isc_refcount_increment0(&keytable->active_nodes, NULL);
+ for (;;) {
+ dns_rbtnodechain_current(&chain, NULL, NULL, &node);
+ if (node->data != NULL)
+ (*func)(keytable, node->data, arg);
+ result = dns_rbtnodechain_next(&chain, NULL, NULL);
+ if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
+ if (result == ISC_R_NOMORE)
+ result = ISC_R_SUCCESS;
+ break;
+ }
+ }
+ isc_refcount_decrement(&keytable->active_nodes, NULL);
+
+ cleanup:
+ dns_rbtnodechain_invalidate(&chain);
+ RWUNLOCK(&keytable->rwlock, isc_rwlocktype_read);
+ return (result);
+}
+
+dst_key_t *
+dns_keynode_key(dns_keynode_t *keynode) {
+
+ /*
+ * Get the DST key associated with keynode.
+ */
+
+ REQUIRE(VALID_KEYNODE(keynode));
+
+ return (keynode->key);
+}
+
+bool
+dns_keynode_managed(dns_keynode_t *keynode) {
+ /*
+ * Is this a managed key?
+ */
+ REQUIRE(VALID_KEYNODE(keynode));
+
+ return (keynode->managed);
+}
+
+isc_result_t
+dns_keynode_create(isc_mem_t *mctx, dns_keynode_t **target) {
+ isc_result_t result;
+ dns_keynode_t *knode;
+
+ REQUIRE(target != NULL && *target == NULL);
+
+ knode = isc_mem_get(mctx, sizeof(dns_keynode_t));
+ if (knode == NULL)
+ return (ISC_R_NOMEMORY);
+
+ knode->magic = KEYNODE_MAGIC;
+ knode->managed = false;
+ knode->key = NULL;
+ knode->next = NULL;
+
+ result = isc_refcount_init(&knode->refcount, 1);
+ if (result != ISC_R_SUCCESS)
+ return (result);
+
+ *target = knode;
+ return (ISC_R_SUCCESS);
+}
+
+void
+dns_keynode_attach(dns_keynode_t *source, dns_keynode_t **target) {
+ REQUIRE(VALID_KEYNODE(source));
+ isc_refcount_increment(&source->refcount, NULL);
+ *target = source;
+}
+
+void
+dns_keynode_detach(isc_mem_t *mctx, dns_keynode_t **keynode) {
+ unsigned int refs;
+ dns_keynode_t *node = *keynode;
+ REQUIRE(VALID_KEYNODE(node));
+ isc_refcount_decrement(&node->refcount, &refs);
+ if (refs == 0) {
+ if (node->key != NULL)
+ dst_key_free(&node->key);
+ isc_refcount_destroy(&node->refcount);
+ isc_mem_put(mctx, node, sizeof(dns_keynode_t));
+ }
+ *keynode = NULL;
+}
+
+void
+dns_keynode_detachall(isc_mem_t *mctx, dns_keynode_t **keynode) {
+ dns_keynode_t *next = NULL, *node = *keynode;
+ REQUIRE(VALID_KEYNODE(node));
+ while (node != NULL) {
+ next = node->next;
+ dns_keynode_detach(mctx, &node);
+ node = next;
+ }
+ *keynode = NULL;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-05 08:56:14 +0000