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keytable.h
/* * 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 https://mozilla.org/MPL/2.0/. * * See the COPYRIGHT file distributed with this work for additional * information regarding copyright ownership. */ #ifndef DNS_KEYTABLE_H #define DNS_KEYTABLE_H 1 /***** ***** Module Info *****/ /*! \file * \brief * The keytable module provides services for storing and retrieving DNSSEC * trusted keys, as well as the ability to find the deepest matching key * for a given domain name. * * MP: *\li The module ensures appropriate synchronization of data structures it * creates and manipulates. * * Resources: *\li TBS * * Security: *\li No anticipated impact. */ #include <stdbool.h> #include <isc/lang.h> #include <isc/magic.h> #include <isc/rwlock.h> #include <isc/stdtime.h> #include <dns/types.h> #include <dst/dst.h> ISC_LANG_BEGINDECLS isc_result_t dns_keytable_create(isc_mem_t *mctx, dns_keytable_t **keytablep); /*%< * Create a keytable. * * Requires: * *\li 'mctx' is a valid memory context. * *\li keytablep != NULL && *keytablep == NULL * * Ensures: * *\li On success, *keytablep is a valid, empty key table. * * Returns: * *\li ISC_R_SUCCESS * *\li Any other result indicates failure. */ void dns_keytable_attach(dns_keytable_t *source, dns_keytable_t **targetp); /*%< * Attach *targetp to source. * * Requires: * *\li 'source' is a valid keytable. * *\li 'targetp' points to a NULL dns_keytable_t *. * * Ensures: * *\li *targetp is attached to source. */ void dns_keytable_detach(dns_keytable_t **keytablep); /*%< * Detach *keytablep from its keytable. * * Requires: * *\li 'keytablep' points to a valid keytable. * * Ensures: * *\li *keytablep is NULL. * *\li If '*keytablep' is the last reference to the keytable, * all resources used by the keytable will be freed */ isc_result_t dns_keytable_add(dns_keytable_t *keytable, bool managed, dst_key_t **keyp); /*%< * Add '*keyp' to 'keytable' (using the name in '*keyp'). * The value of keynode->managed is set to 'managed' * * Notes: * *\li Ownership of *keyp is transferred to the keytable. *\li If the key already exists in the table, ISC_R_EXISTS is * returned and the new key is freed. * * Requires: * *\li 'keytable' points to a valid keytable. * *\li keyp != NULL && *keyp is a valid dst_key_t *. * * Ensures: * *\li On success, *keyp == NULL * * Returns: * *\li ISC_R_SUCCESS *\li ISC_R_EXISTS * *\li Any other result indicates failure. */ isc_result_t dns_keytable_marksecure(dns_keytable_t *keytable, dns_name_t *name); /*%< * Add a null key to 'keytable' for name 'name'. This marks the * name as a secure domain, but doesn't supply any key data to allow the * domain to be validated. (Used when automated trust anchor management * has gotten broken by a zone misconfiguration; for example, when the * active key has been revoked but the stand-by key was still in its 30-day * waiting period for validity.) * * Notes: * *\li If a key already exists in the table, ISC_R_EXISTS is * returned and nothing is done. * * Requires: * *\li 'keytable' points to a valid keytable. * *\li keyp != NULL && *keyp is a valid dst_key_t *. * * Returns: * *\li ISC_R_SUCCESS *\li ISC_R_EXISTS * *\li Any other result indicates failure. */ isc_result_t dns_keytable_delete(dns_keytable_t *keytable, dns_name_t *keyname); /*%< * Delete node(s) from 'keytable' matching name 'keyname' * * Requires: * *\li 'keytable' points to a valid keytable. * *\li 'name' is not NULL * * Returns: * *\li ISC_R_SUCCESS * *\li Any other result indicates failure. */ isc_result_t dns_keytable_deletekeynode(dns_keytable_t *keytable, dst_key_t *dstkey); /*%< * Delete node(s) from 'keytable' containing copies of the key pointed * to by 'dstkey' * * Requires: * *\li 'keytable' points to a valid keytable. *\li 'dstkey' is not NULL * * Returns: * *\li ISC_R_SUCCESS * *\li Any other result indicates failure. */ isc_result_t dns_keytable_find(dns_keytable_t *keytable, dns_name_t *keyname, dns_keynode_t **keynodep); /*%< * Search for the first instance of a key named 'name' in 'keytable', * without regard to keyid and algorithm. Use dns_keytable_nextkeynode() * to find subsequent instances. * * Requires: * *\li 'keytable' is a valid keytable. * *\li 'name' is a valid absolute name. * *\li keynodep != NULL && *keynodep == NULL * * Returns: * *\li ISC_R_SUCCESS *\li ISC_R_NOTFOUND * *\li Any other result indicates an error. */ isc_result_t dns_keytable_nextkeynode(dns_keytable_t *keytable, dns_keynode_t *keynode, dns_keynode_t **nextnodep); /*%< * Return for the next key after 'keynode' in 'keytable', without regard to * keyid and algorithm. * * Requires: * *\li 'keytable' is a valid keytable. * *\li 'keynode' is a valid keynode. * *\li nextnodep != NULL && *nextnodep == NULL * * Returns: * *\li ISC_R_SUCCESS *\li ISC_R_NOTFOUND * *\li Any other result indicates an error. */ 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); /*%< * Search for a key named 'name', matching 'algorithm' and 'tag' in * 'keytable'. This finds the first instance which matches. Use * dns_keytable_findnextkeynode() to find other instances. * * Requires: * *\li 'keytable' is a valid keytable. * *\li 'name' is a valid absolute name. * *\li keynodep != NULL && *keynodep == NULL * * Returns: * *\li ISC_R_SUCCESS *\li DNS_R_PARTIALMATCH the name existed in the keytable. *\li ISC_R_NOTFOUND * *\li Any other result indicates an error. */ isc_result_t dns_keytable_findnextkeynode(dns_keytable_t *keytable, dns_keynode_t *keynode, dns_keynode_t **nextnodep); /*%< * Search for the next key with the same properties as 'keynode' in * 'keytable' as found by dns_keytable_findkeynode(). * * Requires: * *\li 'keytable' is a valid keytable. * *\li 'keynode' is a valid keynode. * *\li nextnodep != NULL && *nextnodep == NULL * * Returns: * *\li ISC_R_SUCCESS *\li ISC_R_NOTFOUND * *\li Any other result indicates an error. */ isc_result_t dns_keytable_finddeepestmatch(dns_keytable_t *keytable, dns_name_t *name, dns_name_t *foundname); /*%< * Search for the deepest match of 'name' in 'keytable'. * * Requires: * *\li 'keytable' is a valid keytable. * *\li 'name' is a valid absolute name. * *\li 'foundname' is a name with a dedicated buffer. * * Returns: * *\li ISC_R_SUCCESS *\li ISC_R_NOTFOUND * *\li Any other result indicates an error. */ void dns_keytable_attachkeynode(dns_keytable_t *keytable, dns_keynode_t *source, dns_keynode_t **target); /*%< * Attach a keynode and and increment the active_nodes counter in a * corresponding keytable. * * Requires: * *\li 'keytable' is a valid keytable. * *\li 'source' is a valid keynode. * *\li 'target' is not null and '*target' is null. */ void dns_keytable_detachkeynode(dns_keytable_t *keytable, dns_keynode_t **keynodep); /*%< * Give back a keynode found via dns_keytable_findkeynode(). * * Requires: * *\li 'keytable' is a valid keytable. * *\li *keynodep is a valid keynode returned by a call to * dns_keytable_findkeynode(). * * Ensures: * *\li *keynodep == NULL */ isc_result_t dns_keytable_issecuredomain(dns_keytable_t *keytable, dns_name_t *name, dns_name_t *foundname, bool *wantdnssecp); /*%< * Is 'name' at or beneath a trusted key? * * Requires: * *\li 'keytable' is a valid keytable. * *\li 'name' is a valid absolute name. * *\li 'foundanme' is NULL or is a pointer to an initialized dns_name_t * *\li '*wantsdnssecp' is a valid bool. * Ensures: * *\li On success, *wantsdnssecp will be true if and only if 'name' * is at or beneath a trusted key. If 'foundname' is not NULL, then * it will be updated to contain the name of the closest enclosing * trust anchor. * * Returns: * *\li ISC_R_SUCCESS * *\li Any other result is an error. */ isc_result_t dns_keytable_dump(dns_keytable_t *keytable, FILE *fp); /*%< * Dump the keytable on fp. */ isc_result_t dns_keytable_totext(dns_keytable_t *keytable, isc_buffer_t **buf); /*%< * Dump the keytable to buffer at 'buf' */ dst_key_t * dns_keynode_key(dns_keynode_t *keynode); /*%< * Get the DST key associated with keynode. */ bool dns_keynode_managed(dns_keynode_t *keynode); /*%< * Is this flagged as a managed key? */ isc_result_t dns_keynode_create(isc_mem_t *mctx, dns_keynode_t **target); /*%< * Allocate space for a keynode */ void dns_keynode_attach(dns_keynode_t *source, dns_keynode_t **target); /*%< * Attach keynode 'source' to '*target' */ void dns_keynode_detach(isc_mem_t *mctx, dns_keynode_t **target); /*%< * Detach a single keynode, without touching any keynodes that * may be pointed to by its 'next' pointer */ void dns_keynode_detachall(isc_mem_t *mctx, dns_keynode_t **target); /*%< * Detach a keynode and all its successors. */ isc_result_t dns_keytable_forall(dns_keytable_t *keytable, void (*func)(dns_keytable_t *, dns_keynode_t *, void *), void *arg); ISC_LANG_ENDDECLS #endif /* DNS_KEYTABLE_H */
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