2 * Copyright (C) 2004-2007, 2009-2012 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 1999-2002 Internet Software Consortium.
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
21 #define DNS_DNSSEC_H 1
23 /*! \file dns/dnssec.h */
26 #include <isc/stdtime.h>
29 #include <dns/types.h>
35 /*%< Maximum number of keys supported in a zone. */
36 #define DNS_MAXZONEKEYS 32
39 * Indicates how the signer found this key: in the key repository, at the
40 * zone apex, or specified by the user.
43 dns_keysource_unknown,
44 dns_keysource_repository,
45 dns_keysource_zoneapex,
50 * A DNSSEC key and hints about its intended use gleaned from metadata
52 struct dns_dnsseckey {
54 isc_boolean_t hint_publish; /*% metadata says to publish */
55 isc_boolean_t force_publish; /*% publish regardless of metadata */
56 isc_boolean_t hint_sign; /*% metadata says to sign with this key */
57 isc_boolean_t force_sign; /*% sign with key regardless of metadata */
58 isc_boolean_t hint_remove; /*% metadata says *don't* publish */
59 isc_boolean_t is_active; /*% key is already active */
60 isc_boolean_t first_sign; /*% key is newly becoming active */
61 unsigned int prepublish; /*% how long until active? */
62 dns_keysource_t source; /*% how the key was found */
63 isc_boolean_t ksk; /*% this is a key-signing key */
64 isc_boolean_t legacy; /*% this is old-style key with no
65 metadata (possibly generated by
66 an older version of BIND9) and
67 should be ignored when searching
68 for keys to import into the zone */
69 unsigned int index; /*% position in list */
70 ISC_LINK(dns_dnsseckey_t) link;
74 dns_dnssec_keyfromrdata(dns_name_t *name, dns_rdata_t *rdata, isc_mem_t *mctx,
77 * Creates a DST key from a DNS record. Basically a wrapper around
81 *\li 'name' is not NULL
82 *\li 'rdata' is not NULL
83 *\li 'mctx' is not NULL
84 *\li 'key' is not NULL
90 *\li DST_R_INVALIDPUBLICKEY
91 *\li various errors from dns_name_totext
95 dns_dnssec_sign(dns_name_t *name, dns_rdataset_t *set, dst_key_t *key,
96 isc_stdtime_t *inception, isc_stdtime_t *expire,
97 isc_mem_t *mctx, isc_buffer_t *buffer, dns_rdata_t *sigrdata);
99 * Generates a SIG record covering this rdataset. This has no effect
100 * on existing SIG records.
103 *\li 'name' (the owner name of the record) is a valid name
104 *\li 'set' is a valid rdataset
105 *\li 'key' is a valid key
106 *\li 'inception' is not NULL
107 *\li 'expire' is not NULL
108 *\li 'mctx' is not NULL
109 *\li 'buffer' is not NULL
110 *\li 'sigrdata' is not NULL
116 *\li #DNS_R_INVALIDTIME - the expiration is before the inception
117 *\li #DNS_R_KEYUNAUTHORIZED - the key cannot sign this data (either
118 * it is not a zone key or its flags prevent
124 dns_dnssec_verify(dns_name_t *name, dns_rdataset_t *set, dst_key_t *key,
125 isc_boolean_t ignoretime, isc_mem_t *mctx,
126 dns_rdata_t *sigrdata);
129 dns_dnssec_verify2(dns_name_t *name, dns_rdataset_t *set, dst_key_t *key,
130 isc_boolean_t ignoretime, isc_mem_t *mctx,
131 dns_rdata_t *sigrdata, dns_name_t *wild);
133 * Verifies the SIG record covering this rdataset signed by a specific
134 * key. This does not determine if the key's owner is authorized to
135 * sign this record, as this requires a resolver or database.
136 * If 'ignoretime' is ISC_TRUE, temporal validity will not be checked.
139 *\li 'name' (the owner name of the record) is a valid name
140 *\li 'set' is a valid rdataset
141 *\li 'key' is a valid key
142 *\li 'mctx' is not NULL
143 *\li 'sigrdata' is a valid rdata containing a SIG record
144 *\li 'wild' if non-NULL then is a valid and has a buffer.
149 *\li #DNS_R_FROMWILDCARD - the signature is valid and is from
150 * a wildcard expansion. dns_dnssec_verify2() only.
151 * 'wild' contains the name of the wildcard if non-NULL.
152 *\li #DNS_R_SIGINVALID - the signature fails to verify
153 *\li #DNS_R_SIGEXPIRED - the signature has expired
154 *\li #DNS_R_SIGFUTURE - the signature's validity period has not begun
155 *\li #DNS_R_KEYUNAUTHORIZED - the key cannot sign this data (either
156 * it is not a zone key or its flags prevent
163 dns_dnssec_findzonekeys(dns_db_t *db, dns_dbversion_t *ver, dns_dbnode_t *node,
164 dns_name_t *name, isc_mem_t *mctx,
165 unsigned int maxkeys, dst_key_t **keys,
166 unsigned int *nkeys);
168 dns_dnssec_findzonekeys2(dns_db_t *db, dns_dbversion_t *ver,
169 dns_dbnode_t *node, dns_name_t *name,
170 const char *directory, isc_mem_t *mctx,
171 unsigned int maxkeys, dst_key_t **keys,
172 unsigned int *nkeys);
174 * Finds a set of zone keys.
175 * XXX temporary - this should be handled in dns_zone_t.
180 dns_dnssec_signmessage(dns_message_t *msg, dst_key_t *key);
182 * Signs a message with a SIG(0) record. This is implicitly called by
183 * dns_message_renderend() if msg->sig0key is not NULL.
186 *\li 'msg' is a valid message
187 *\li 'key' is a valid key that can be used for signing
196 dns_dnssec_verifymessage(isc_buffer_t *source, dns_message_t *msg,
199 * Verifies a message signed by a SIG(0) record. This is not
200 * called implicitly by dns_message_parse(). If dns_message_signer()
201 * is called before dns_dnssec_verifymessage(), it will return
202 * #DNS_R_NOTVERIFIEDYET. dns_dnssec_verifymessage() will set
203 * the verified_sig0 flag in msg if the verify succeeds, and
204 * the sig0status field otherwise.
207 *\li 'source' is a valid buffer containing the unparsed message
208 *\li 'msg' is a valid message
209 *\li 'key' is a valid key
214 *\li #ISC_R_NOTFOUND - no SIG(0) was found
215 *\li #DNS_R_SIGINVALID - the SIG record is not well-formed or
216 * was not generated by the key.
221 dns_dnssec_selfsigns(dns_rdata_t *rdata, dns_name_t *name,
222 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset,
223 isc_boolean_t ignoretime, isc_mem_t *mctx);
227 dns_dnssec_signs(dns_rdata_t *rdata, dns_name_t *name,
228 dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset,
229 isc_boolean_t ignoretime, isc_mem_t *mctx);
231 * Verify that 'rdataset' is validly signed in 'sigrdataset' by
232 * the key in 'rdata'.
234 * dns_dnssec_selfsigns() requires that rdataset be a DNSKEY or KEY
235 * rrset. dns_dnssec_signs() works on any rrset.
240 dns_dnsseckey_create(isc_mem_t *mctx, dst_key_t **dstkey,
241 dns_dnsseckey_t **dkp);
243 * Create and initialize a dns_dnsseckey_t structure.
246 *\li 'dkp' is not NULL and '*dkp' is NULL.
254 dns_dnsseckey_destroy(isc_mem_t *mctx, dns_dnsseckey_t **dkp);
256 * Reclaim a dns_dnsseckey_t structure.
259 *\li 'dkp' is not NULL and '*dkp' is not NULL.
266 dns_dnssec_findmatchingkeys(dns_name_t *origin, const char *directory,
267 isc_mem_t *mctx, dns_dnsseckeylist_t *keylist);
269 * Search 'directory' for K* key files matching the name in 'origin'.
270 * Append all such keys, along with use hints gleaned from their
271 * metadata, onto 'keylist'.
274 *\li 'keylist' is not NULL
280 *\li any error returned by dns_name_totext(), isc_dir_open(), or
281 * dst_key_fromnamedfile()
284 *\li On error, keylist is unchanged
288 dns_dnssec_keylistfromrdataset(dns_name_t *origin,
289 const char *directory, isc_mem_t *mctx,
290 dns_rdataset_t *keyset, dns_rdataset_t *keysigs,
291 dns_rdataset_t *soasigs, isc_boolean_t savekeys,
292 isc_boolean_t public,
293 dns_dnsseckeylist_t *keylist);
295 * Append the contents of a DNSKEY rdataset 'keyset' to 'keylist'.
296 * Omit duplicates. If 'public' is ISC_FALSE, search 'directory' for
297 * matching key files, and load the private keys that go with
298 * the public ones. If 'savekeys' is ISC_TRUE, mark the keys so
299 * they will not be deleted or inactivated regardless of metadata.
301 * 'keysigs' and 'soasigs', if not NULL and associated, contain the
302 * RRSIGS for the DNSKEY and SOA records respectively and are used to mark
303 * whether a key is already active in the zone.
307 dns_dnssec_updatekeys(dns_dnsseckeylist_t *keys, dns_dnsseckeylist_t *newkeys,
308 dns_dnsseckeylist_t *removed, dns_name_t *origin,
309 dns_ttl_t ttl, dns_diff_t *diff, isc_boolean_t allzsk,
310 isc_mem_t *mctx, void (*report)(const char *, ...));
312 * Update the list of keys in 'keys' with new key information in 'newkeys'.
314 * For each key in 'newkeys', see if it has a match in 'keys'.
315 * - If not, and if the metadata says the key should be published:
316 * add it to 'keys', and place a dns_difftuple into 'diff' so
317 * the key can be added to the DNSKEY set. If the metadata says it
318 * should be active, set the first_sign flag.
319 * - If so, and if the metadata says it should be removed:
320 * remove it from 'keys', and place a dns_difftuple into 'diff' so
321 * the key can be removed from the DNSKEY set. if 'removed' is non-NULL,
322 * copy the key into that list; otherwise destroy it.
323 * - Otherwise, make sure keys has current metadata.
325 * If 'allzsk' is true, we are allowing KSK-flagged keys to be used as
328 * 'ttl' is the TTL of the DNSKEY RRset; if it is longer than the
329 * time until a new key will be activated, then we have to delay the
332 * 'report' points to a function for reporting status.
334 * On completion, any remaining keys in 'newkeys' are freed.
338 #endif /* DNS_DNSSEC_H */