/*
* 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/refcount.h>
#include <isc/rwlock.h>
#include <isc/stdtime.h>
#include <dns/rdatastruct.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, bool initial,
dns_name_t *name, dns_rdata_ds_t *ds);
/*%<
* Add a key to 'keytable'. The keynode associated with 'name'
* is updated with the DS specified in 'ds'.
*
* The value of keynode->managed is set to 'managed', and the
* value of keynode->initial is set to 'initial'. (Note: 'initial'
* should only be used when adding managed-keys from configuration.
* This indicates the key is in "initializing" state, and has not yet
* been confirmed with a key refresh query. Once a key refresh query
* has validated, we update the keynode with initial == false.)
*
* Notes:
*
*\li If the key already exists in the table, adding it again
* has no effect and ISC_R_SUCCESS is returned.
*
* Requires:
*
*\li 'keytable' points to a valid keytable.
*\li 'ds' is not NULL.
*\li if 'initial' is true then 'managed' must also be true.
*
* 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, const 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, const dns_name_t *keyname);
/*%<
* Delete all trust anchors 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_deletekey(dns_keytable_t *keytable, const dns_name_t *keyname,
dns_rdata_dnskey_t *dnskey);
/*%<
* Remove the trust anchor matching the name 'keyname' and the DNSKEY
* rdata struct 'dnskey' from 'keytable'.
*
* Requires:
*
*\li 'keytable' points to a valid keytable.
*\li 'dnskey' is not NULL
*
* Returns:
*
*\li ISC_R_SUCCESS
*
*\li Any other result indicates failure.
*/
isc_result_t
dns_keytable_find(dns_keytable_t *keytable, const dns_name_t *keyname,
dns_keynode_t **keynodep);
/*%<
* Search for the first instance of a trust anchor named 'name' in
* 'keytable', without regard to keyid and algorithm.
*
* 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_finddeepestmatch(dns_keytable_t *keytable, const 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_detachkeynode(dns_keytable_t *keytable, dns_keynode_t **keynodep);
/*%<
* Detach a keynode found via dns_keytable_find().
*
* Requires:
*
*\li *keynodep is a valid keynode returned by a call to dns_keytable_find().
*
* Ensures:
*
*\li *keynodep == NULL
*/
isc_result_t
dns_keytable_issecuredomain(dns_keytable_t *keytable, const 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'
*/
bool
dns_keynode_dsset(dns_keynode_t *keynode, dns_rdataset_t *rdataset);
/*%<
* Clone the DS RRset associated with 'keynode' into 'rdataset' if
* it exists. 'dns_rdataset_disassociate(rdataset)' needs to be
* called when done.
*
* Returns:
*\li true if there is a DS RRset.
*\li false if there isn't DS RRset.
*
* Requires:
*\li 'keynode' is valid.
*\li 'rdataset' is valid or NULL.
*/
bool
dns_keynode_managed(dns_keynode_t *keynode);
/*%<
* Is this flagged as a managed key?
*/
bool
dns_keynode_initial(dns_keynode_t *keynode);
/*%<
* Is this flagged as an initializing key?
*/
void
dns_keynode_trust(dns_keynode_t *keynode);
/*%<
* Sets keynode->initial to false in order to mark the key as
* trusted: no longer an initializing key.
*/
isc_result_t
dns_keytable_forall(dns_keytable_t *keytable,
void (*func)(dns_keytable_t *, dns_keynode_t *,
dns_name_t *, void *),
void *arg);
ISC_LANG_ENDDECLS
#endif /* DNS_KEYTABLE_H */
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