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/*
* Copyright (C) 2004, 2005, 2007, 2009, 2010 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 2000, 2001 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or 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 ISC 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.
*/
/* $Id: keytable.h,v 1.23 2010-06-25 03:24:05 marka Exp $ */
#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 <isc/lang.h>
#include <isc/magic.h>
#include <isc/refcount.h>
#include <isc/rwlock.h>
#include <isc/stdtime.h>
#include <dns/types.h>
#include <dst/dst.h>
ISC_LANG_BEGINDECLS
struct dns_keytable {
/* Unlocked. */
unsigned int magic;
isc_mem_t *mctx;
isc_mutex_t lock;
isc_rwlock_t rwlock;
/* Locked by lock. */
isc_uint32_t active_nodes;
/* Locked by rwlock. */
isc_uint32_t references;
dns_rbt_t *table;
};
#define KEYTABLE_MAGIC ISC_MAGIC('K', 'T', 'b', 'l')
#define VALID_KEYTABLE(kt) ISC_MAGIC_VALID(kt, KEYTABLE_MAGIC)
struct dns_keynode {
unsigned int magic;
isc_refcount_t refcount;
dst_key_t * key;
isc_boolean_t managed;
struct dns_keynode * next;
};
#define KEYNODE_MAGIC ISC_MAGIC('K', 'N', 'o', 'd')
#define VALID_KEYNODE(kn) ISC_MAGIC_VALID(kn, KEYNODE_MAGIC)
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, isc_boolean_t 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,
isc_boolean_t *wantdnssecp);
/*%<
* Is 'name' at or beneath a trusted key?
*
* Requires:
*
*\li 'keytable' is a valid keytable.
*
*\li 'name' is a valid absolute name.
*
*\li '*wantsdnssecp' is a valid isc_boolean_t.
*
* Ensures:
*
*\li On success, *wantsdnssecp will be ISC_TRUE if and only if 'name'
* is at or beneath a trusted key.
*
* 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.
*/
dst_key_t *
dns_keynode_key(dns_keynode_t *keynode);
/*%<
* Get the DST key associated with keynode.
*/
isc_boolean_t
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 succesors.
*/
ISC_LANG_ENDDECLS
#endif /* DNS_KEYTABLE_H */
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