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2b442ac8 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2015 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <gcrypt.h> | |
23 | ||
24 | #include "alloc-util.h" | |
25 | #include "dns-domain.h" | |
72667f08 | 26 | #include "hexdecoct.h" |
2b442ac8 LP |
27 | #include "resolved-dns-dnssec.h" |
28 | #include "resolved-dns-packet.h" | |
24710c48 | 29 | #include "string-table.h" |
2b442ac8 LP |
30 | |
31 | /* Open question: | |
32 | * | |
33 | * How does the DNSSEC canonical form of a hostname with a label | |
34 | * containing a dot look like, the way DNS-SD does it? | |
35 | * | |
2cd87277 LP |
36 | * TODO: |
37 | * | |
bb1fa242 LP |
38 | * - Make trust anchor store read additional DS+DNSKEY data from disk |
39 | * - wildcard zones compatibility | |
40 | * - multi-label zone compatibility | |
3e92a719 | 41 | * - cname/dname compatibility |
bb1fa242 | 42 | * - per-interface DNSSEC setting |
73b8d8e9 | 43 | * - fix TTL for cache entries to match RRSIG TTL |
3e92a719 | 44 | * - retry on failed validation? |
2cd87277 LP |
45 | * - DSA support |
46 | * - EC support? | |
47 | * | |
2b442ac8 LP |
48 | * */ |
49 | ||
50 | #define VERIFY_RRS_MAX 256 | |
51 | #define MAX_KEY_SIZE (32*1024) | |
52 | ||
896c5672 LP |
53 | /* Permit a maximum clock skew of 1h 10min. This should be enough to deal with DST confusion */ |
54 | #define SKEW_MAX (1*USEC_PER_HOUR + 10*USEC_PER_MINUTE) | |
55 | ||
2b442ac8 LP |
56 | /* |
57 | * The DNSSEC Chain of trust: | |
58 | * | |
59 | * Normal RRs are protected via RRSIG RRs in combination with DNSKEY RRs, all in the same zone | |
60 | * DNSKEY RRs are either protected like normal RRs, or via a DS from a zone "higher" up the tree | |
61 | * DS RRs are protected like normal RRs | |
62 | * | |
63 | * Example chain: | |
64 | * Normal RR → RRSIG/DNSKEY+ → DS → RRSIG/DNSKEY+ → DS → ... → DS → RRSIG/DNSKEY+ → DS | |
65 | */ | |
66 | ||
0638401a LP |
67 | static void initialize_libgcrypt(void) { |
68 | const char *p; | |
69 | ||
70 | if (gcry_control(GCRYCTL_INITIALIZATION_FINISHED_P)) | |
71 | return; | |
72 | ||
73 | p = gcry_check_version("1.4.5"); | |
74 | assert(p); | |
75 | ||
76 | gcry_control(GCRYCTL_DISABLE_SECMEM); | |
77 | gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0); | |
78 | } | |
79 | ||
2b442ac8 | 80 | static bool dnssec_algorithm_supported(int algorithm) { |
964ef14c LP |
81 | return IN_SET(algorithm, |
82 | DNSSEC_ALGORITHM_RSASHA1, | |
83 | DNSSEC_ALGORITHM_RSASHA1_NSEC3_SHA1, | |
84 | DNSSEC_ALGORITHM_RSASHA256, | |
85 | DNSSEC_ALGORITHM_RSASHA512); | |
2b442ac8 LP |
86 | } |
87 | ||
2b442ac8 LP |
88 | uint16_t dnssec_keytag(DnsResourceRecord *dnskey) { |
89 | const uint8_t *p; | |
90 | uint32_t sum; | |
91 | size_t i; | |
92 | ||
93 | /* The algorithm from RFC 4034, Appendix B. */ | |
94 | ||
95 | assert(dnskey); | |
96 | assert(dnskey->key->type == DNS_TYPE_DNSKEY); | |
97 | ||
98 | sum = (uint32_t) dnskey->dnskey.flags + | |
99 | ((((uint32_t) dnskey->dnskey.protocol) << 8) + (uint32_t) dnskey->dnskey.algorithm); | |
100 | ||
101 | p = dnskey->dnskey.key; | |
102 | ||
103 | for (i = 0; i < dnskey->dnskey.key_size; i++) | |
104 | sum += (i & 1) == 0 ? (uint32_t) p[i] << 8 : (uint32_t) p[i]; | |
105 | ||
106 | sum += (sum >> 16) & UINT32_C(0xFFFF); | |
107 | ||
108 | return sum & UINT32_C(0xFFFF); | |
109 | } | |
110 | ||
111 | static int rr_compare(const void *a, const void *b) { | |
112 | DnsResourceRecord **x = (DnsResourceRecord**) a, **y = (DnsResourceRecord**) b; | |
113 | size_t m; | |
114 | int r; | |
115 | ||
116 | /* Let's order the RRs according to RFC 4034, Section 6.3 */ | |
117 | ||
118 | assert(x); | |
119 | assert(*x); | |
120 | assert((*x)->wire_format); | |
121 | assert(y); | |
122 | assert(*y); | |
123 | assert((*y)->wire_format); | |
124 | ||
125 | m = MIN((*x)->wire_format_size, (*y)->wire_format_size); | |
126 | ||
127 | r = memcmp((*x)->wire_format, (*y)->wire_format, m); | |
128 | if (r != 0) | |
129 | return r; | |
130 | ||
131 | if ((*x)->wire_format_size < (*y)->wire_format_size) | |
132 | return -1; | |
133 | else if ((*x)->wire_format_size > (*y)->wire_format_size) | |
134 | return 1; | |
135 | ||
136 | return 0; | |
137 | } | |
138 | ||
139 | static int dnssec_rsa_verify( | |
140 | const char *hash_algorithm, | |
141 | const void *signature, size_t signature_size, | |
142 | const void *data, size_t data_size, | |
143 | const void *exponent, size_t exponent_size, | |
144 | const void *modulus, size_t modulus_size) { | |
145 | ||
146 | gcry_sexp_t public_key_sexp = NULL, data_sexp = NULL, signature_sexp = NULL; | |
147 | gcry_mpi_t n = NULL, e = NULL, s = NULL; | |
148 | gcry_error_t ge; | |
149 | int r; | |
150 | ||
151 | assert(hash_algorithm); | |
152 | ||
153 | ge = gcry_mpi_scan(&s, GCRYMPI_FMT_USG, signature, signature_size, NULL); | |
154 | if (ge != 0) { | |
155 | r = -EIO; | |
156 | goto finish; | |
157 | } | |
158 | ||
159 | ge = gcry_mpi_scan(&e, GCRYMPI_FMT_USG, exponent, exponent_size, NULL); | |
160 | if (ge != 0) { | |
161 | r = -EIO; | |
162 | goto finish; | |
163 | } | |
164 | ||
165 | ge = gcry_mpi_scan(&n, GCRYMPI_FMT_USG, modulus, modulus_size, NULL); | |
166 | if (ge != 0) { | |
167 | r = -EIO; | |
168 | goto finish; | |
169 | } | |
170 | ||
171 | ge = gcry_sexp_build(&signature_sexp, | |
172 | NULL, | |
173 | "(sig-val (rsa (s %m)))", | |
174 | s); | |
175 | ||
176 | if (ge != 0) { | |
177 | r = -EIO; | |
178 | goto finish; | |
179 | } | |
180 | ||
181 | ge = gcry_sexp_build(&data_sexp, | |
182 | NULL, | |
183 | "(data (flags pkcs1) (hash %s %b))", | |
184 | hash_algorithm, | |
185 | (int) data_size, | |
186 | data); | |
187 | if (ge != 0) { | |
188 | r = -EIO; | |
189 | goto finish; | |
190 | } | |
191 | ||
192 | ge = gcry_sexp_build(&public_key_sexp, | |
193 | NULL, | |
194 | "(public-key (rsa (n %m) (e %m)))", | |
195 | n, | |
196 | e); | |
197 | if (ge != 0) { | |
198 | r = -EIO; | |
199 | goto finish; | |
200 | } | |
201 | ||
202 | ge = gcry_pk_verify(signature_sexp, data_sexp, public_key_sexp); | |
d12bf2bd | 203 | if (gpg_err_code(ge) == GPG_ERR_BAD_SIGNATURE) |
2b442ac8 | 204 | r = 0; |
d12bf2bd LP |
205 | else if (ge != 0) { |
206 | log_debug("RSA signature check failed: %s", gpg_strerror(ge)); | |
2b442ac8 | 207 | r = -EIO; |
d12bf2bd | 208 | } else |
2b442ac8 LP |
209 | r = 1; |
210 | ||
211 | finish: | |
212 | if (e) | |
213 | gcry_mpi_release(e); | |
214 | if (n) | |
215 | gcry_mpi_release(n); | |
216 | if (s) | |
217 | gcry_mpi_release(s); | |
218 | ||
219 | if (public_key_sexp) | |
220 | gcry_sexp_release(public_key_sexp); | |
221 | if (signature_sexp) | |
222 | gcry_sexp_release(signature_sexp); | |
223 | if (data_sexp) | |
224 | gcry_sexp_release(data_sexp); | |
225 | ||
226 | return r; | |
227 | } | |
228 | ||
229 | static void md_add_uint8(gcry_md_hd_t md, uint8_t v) { | |
230 | gcry_md_write(md, &v, sizeof(v)); | |
231 | } | |
232 | ||
233 | static void md_add_uint16(gcry_md_hd_t md, uint16_t v) { | |
234 | v = htobe16(v); | |
235 | gcry_md_write(md, &v, sizeof(v)); | |
236 | } | |
237 | ||
238 | static void md_add_uint32(gcry_md_hd_t md, uint32_t v) { | |
239 | v = htobe32(v); | |
240 | gcry_md_write(md, &v, sizeof(v)); | |
241 | } | |
242 | ||
2a326321 LP |
243 | static int dnssec_rrsig_expired(DnsResourceRecord *rrsig, usec_t realtime) { |
244 | usec_t expiration, inception, skew; | |
245 | ||
246 | assert(rrsig); | |
247 | assert(rrsig->key->type == DNS_TYPE_RRSIG); | |
248 | ||
249 | if (realtime == USEC_INFINITY) | |
250 | realtime = now(CLOCK_REALTIME); | |
251 | ||
252 | expiration = rrsig->rrsig.expiration * USEC_PER_SEC; | |
253 | inception = rrsig->rrsig.inception * USEC_PER_SEC; | |
254 | ||
255 | if (inception > expiration) | |
2a44bec4 | 256 | return -EKEYREJECTED; |
2a326321 | 257 | |
896c5672 LP |
258 | /* Permit a certain amount of clock skew of 10% of the valid |
259 | * time range. This takes inspiration from unbound's | |
260 | * resolver. */ | |
2a326321 | 261 | skew = (expiration - inception) / 10; |
896c5672 LP |
262 | if (skew > SKEW_MAX) |
263 | skew = SKEW_MAX; | |
2a326321 LP |
264 | |
265 | if (inception < skew) | |
266 | inception = 0; | |
267 | else | |
268 | inception -= skew; | |
269 | ||
270 | if (expiration + skew < expiration) | |
271 | expiration = USEC_INFINITY; | |
272 | else | |
273 | expiration += skew; | |
274 | ||
275 | return realtime < inception || realtime > expiration; | |
276 | } | |
277 | ||
278 | int dnssec_verify_rrset( | |
279 | DnsAnswer *a, | |
280 | DnsResourceKey *key, | |
281 | DnsResourceRecord *rrsig, | |
282 | DnsResourceRecord *dnskey, | |
547973de LP |
283 | usec_t realtime, |
284 | DnssecResult *result) { | |
2a326321 | 285 | |
2b442ac8 LP |
286 | uint8_t wire_format_name[DNS_WIRE_FOMAT_HOSTNAME_MAX]; |
287 | size_t exponent_size, modulus_size, hash_size; | |
288 | void *exponent, *modulus, *hash; | |
289 | DnsResourceRecord **list, *rr; | |
290 | gcry_md_hd_t md = NULL; | |
291 | size_t k, n = 0; | |
292 | int r; | |
293 | ||
294 | assert(key); | |
295 | assert(rrsig); | |
296 | assert(dnskey); | |
547973de | 297 | assert(result); |
2a326321 LP |
298 | assert(rrsig->key->type == DNS_TYPE_RRSIG); |
299 | assert(dnskey->key->type == DNS_TYPE_DNSKEY); | |
2b442ac8 LP |
300 | |
301 | /* Verifies the the RRSet matching the specified "key" in "a", | |
302 | * using the signature "rrsig" and the key "dnskey". It's | |
303 | * assumed the RRSIG and DNSKEY match. */ | |
304 | ||
203f1b35 LP |
305 | if (!dnssec_algorithm_supported(rrsig->rrsig.algorithm)) { |
306 | *result = DNSSEC_UNSUPPORTED_ALGORITHM; | |
307 | return 0; | |
308 | } | |
2b442ac8 LP |
309 | |
310 | if (a->n_rrs > VERIFY_RRS_MAX) | |
311 | return -E2BIG; | |
312 | ||
2a326321 LP |
313 | r = dnssec_rrsig_expired(rrsig, realtime); |
314 | if (r < 0) | |
315 | return r; | |
547973de LP |
316 | if (r > 0) { |
317 | *result = DNSSEC_SIGNATURE_EXPIRED; | |
318 | return 0; | |
319 | } | |
2a326321 | 320 | |
2b442ac8 LP |
321 | /* Collect all relevant RRs in a single array, so that we can look at the RRset */ |
322 | list = newa(DnsResourceRecord *, a->n_rrs); | |
323 | ||
324 | DNS_ANSWER_FOREACH(rr, a) { | |
325 | r = dns_resource_key_equal(key, rr->key); | |
326 | if (r < 0) | |
327 | return r; | |
328 | if (r == 0) | |
329 | continue; | |
330 | ||
331 | /* We need the wire format for ordering, and digest calculation */ | |
332 | r = dns_resource_record_to_wire_format(rr, true); | |
333 | if (r < 0) | |
334 | return r; | |
335 | ||
336 | list[n++] = rr; | |
337 | } | |
338 | ||
339 | if (n <= 0) | |
340 | return -ENODATA; | |
341 | ||
342 | /* Bring the RRs into canonical order */ | |
6c5e8fbf | 343 | qsort_safe(list, n, sizeof(DnsResourceRecord*), rr_compare); |
2b442ac8 | 344 | |
0638401a LP |
345 | initialize_libgcrypt(); |
346 | ||
2b442ac8 LP |
347 | /* OK, the RRs are now in canonical order. Let's calculate the digest */ |
348 | switch (rrsig->rrsig.algorithm) { | |
349 | ||
350 | case DNSSEC_ALGORITHM_RSASHA1: | |
964ef14c | 351 | case DNSSEC_ALGORITHM_RSASHA1_NSEC3_SHA1: |
2b442ac8 LP |
352 | gcry_md_open(&md, GCRY_MD_SHA1, 0); |
353 | hash_size = 20; | |
354 | break; | |
355 | ||
356 | case DNSSEC_ALGORITHM_RSASHA256: | |
357 | gcry_md_open(&md, GCRY_MD_SHA256, 0); | |
358 | hash_size = 32; | |
359 | break; | |
360 | ||
361 | case DNSSEC_ALGORITHM_RSASHA512: | |
362 | gcry_md_open(&md, GCRY_MD_SHA512, 0); | |
363 | hash_size = 64; | |
364 | break; | |
365 | ||
366 | default: | |
367 | assert_not_reached("Unknown digest"); | |
368 | } | |
369 | ||
370 | if (!md) | |
371 | return -EIO; | |
372 | ||
373 | md_add_uint16(md, rrsig->rrsig.type_covered); | |
374 | md_add_uint8(md, rrsig->rrsig.algorithm); | |
375 | md_add_uint8(md, rrsig->rrsig.labels); | |
376 | md_add_uint32(md, rrsig->rrsig.original_ttl); | |
377 | md_add_uint32(md, rrsig->rrsig.expiration); | |
378 | md_add_uint32(md, rrsig->rrsig.inception); | |
379 | md_add_uint16(md, rrsig->rrsig.key_tag); | |
380 | ||
381 | r = dns_name_to_wire_format(rrsig->rrsig.signer, wire_format_name, sizeof(wire_format_name), true); | |
382 | if (r < 0) | |
383 | goto finish; | |
384 | gcry_md_write(md, wire_format_name, r); | |
385 | ||
386 | for (k = 0; k < n; k++) { | |
387 | size_t l; | |
388 | rr = list[k]; | |
389 | ||
390 | r = dns_name_to_wire_format(DNS_RESOURCE_KEY_NAME(rr->key), wire_format_name, sizeof(wire_format_name), true); | |
391 | if (r < 0) | |
392 | goto finish; | |
393 | gcry_md_write(md, wire_format_name, r); | |
394 | ||
395 | md_add_uint16(md, rr->key->type); | |
396 | md_add_uint16(md, rr->key->class); | |
397 | md_add_uint32(md, rrsig->rrsig.original_ttl); | |
398 | ||
399 | assert(rr->wire_format_rdata_offset <= rr->wire_format_size); | |
400 | l = rr->wire_format_size - rr->wire_format_rdata_offset; | |
401 | assert(l <= 0xFFFF); | |
402 | ||
403 | md_add_uint16(md, (uint16_t) l); | |
404 | gcry_md_write(md, (uint8_t*) rr->wire_format + rr->wire_format_rdata_offset, l); | |
405 | } | |
406 | ||
407 | hash = gcry_md_read(md, 0); | |
408 | if (!hash) { | |
409 | r = -EIO; | |
410 | goto finish; | |
411 | } | |
412 | ||
413 | if (*(uint8_t*) dnskey->dnskey.key == 0) { | |
414 | /* exponent is > 255 bytes long */ | |
415 | ||
416 | exponent = (uint8_t*) dnskey->dnskey.key + 3; | |
417 | exponent_size = | |
418 | ((size_t) (((uint8_t*) dnskey->dnskey.key)[0]) << 8) | | |
419 | ((size_t) ((uint8_t*) dnskey->dnskey.key)[1]); | |
420 | ||
421 | if (exponent_size < 256) { | |
422 | r = -EINVAL; | |
423 | goto finish; | |
424 | } | |
425 | ||
426 | if (3 + exponent_size >= dnskey->dnskey.key_size) { | |
427 | r = -EINVAL; | |
428 | goto finish; | |
429 | } | |
430 | ||
431 | modulus = (uint8_t*) dnskey->dnskey.key + 3 + exponent_size; | |
432 | modulus_size = dnskey->dnskey.key_size - 3 - exponent_size; | |
433 | ||
434 | } else { | |
435 | /* exponent is <= 255 bytes long */ | |
436 | ||
437 | exponent = (uint8_t*) dnskey->dnskey.key + 1; | |
438 | exponent_size = (size_t) ((uint8_t*) dnskey->dnskey.key)[0]; | |
439 | ||
440 | if (exponent_size <= 0) { | |
441 | r = -EINVAL; | |
442 | goto finish; | |
443 | } | |
444 | ||
445 | if (1 + exponent_size >= dnskey->dnskey.key_size) { | |
446 | r = -EINVAL; | |
447 | goto finish; | |
448 | } | |
449 | ||
450 | modulus = (uint8_t*) dnskey->dnskey.key + 1 + exponent_size; | |
451 | modulus_size = dnskey->dnskey.key_size - 1 - exponent_size; | |
452 | } | |
453 | ||
454 | r = dnssec_rsa_verify( | |
455 | gcry_md_algo_name(gcry_md_get_algo(md)), | |
456 | rrsig->rrsig.signature, rrsig->rrsig.signature_size, | |
457 | hash, hash_size, | |
458 | exponent, exponent_size, | |
459 | modulus, modulus_size); | |
460 | if (r < 0) | |
461 | goto finish; | |
462 | ||
547973de LP |
463 | *result = r ? DNSSEC_VALIDATED : DNSSEC_INVALID; |
464 | r = 0; | |
2b442ac8 LP |
465 | |
466 | finish: | |
467 | gcry_md_close(md); | |
468 | return r; | |
469 | } | |
470 | ||
471 | int dnssec_rrsig_match_dnskey(DnsResourceRecord *rrsig, DnsResourceRecord *dnskey) { | |
472 | ||
473 | assert(rrsig); | |
474 | assert(dnskey); | |
475 | ||
476 | /* Checks if the specified DNSKEY RR matches the key used for | |
477 | * the signature in the specified RRSIG RR */ | |
478 | ||
479 | if (rrsig->key->type != DNS_TYPE_RRSIG) | |
480 | return -EINVAL; | |
481 | ||
482 | if (dnskey->key->type != DNS_TYPE_DNSKEY) | |
483 | return 0; | |
484 | if (dnskey->key->class != rrsig->key->class) | |
485 | return 0; | |
486 | if ((dnskey->dnskey.flags & DNSKEY_FLAG_ZONE_KEY) == 0) | |
487 | return 0; | |
488 | if (dnskey->dnskey.protocol != 3) | |
489 | return 0; | |
490 | if (dnskey->dnskey.algorithm != rrsig->rrsig.algorithm) | |
491 | return 0; | |
492 | ||
493 | if (dnssec_keytag(dnskey) != rrsig->rrsig.key_tag) | |
494 | return 0; | |
495 | ||
15accc27 | 496 | return dns_name_equal(DNS_RESOURCE_KEY_NAME(dnskey->key), rrsig->rrsig.signer); |
2b442ac8 LP |
497 | } |
498 | ||
105e1512 | 499 | int dnssec_key_match_rrsig(const DnsResourceKey *key, DnsResourceRecord *rrsig) { |
2b442ac8 LP |
500 | assert(key); |
501 | assert(rrsig); | |
502 | ||
503 | /* Checks if the specified RRSIG RR protects the RRSet of the specified RR key. */ | |
504 | ||
505 | if (rrsig->key->type != DNS_TYPE_RRSIG) | |
506 | return 0; | |
507 | if (rrsig->key->class != key->class) | |
508 | return 0; | |
509 | if (rrsig->rrsig.type_covered != key->type) | |
510 | return 0; | |
511 | ||
512 | return dns_name_equal(DNS_RESOURCE_KEY_NAME(rrsig->key), DNS_RESOURCE_KEY_NAME(key)); | |
513 | } | |
514 | ||
2a326321 LP |
515 | int dnssec_verify_rrset_search( |
516 | DnsAnswer *a, | |
517 | DnsResourceKey *key, | |
518 | DnsAnswer *validated_dnskeys, | |
547973de LP |
519 | usec_t realtime, |
520 | DnssecResult *result) { | |
2a326321 | 521 | |
203f1b35 | 522 | bool found_rrsig = false, found_invalid = false, found_expired_rrsig = false, found_unsupported_algorithm = false; |
2b442ac8 LP |
523 | DnsResourceRecord *rrsig; |
524 | int r; | |
525 | ||
526 | assert(key); | |
547973de | 527 | assert(result); |
2b442ac8 | 528 | |
105e1512 | 529 | /* Verifies all RRs from "a" that match the key "key" against DNSKEYs in "validated_dnskeys" */ |
2b442ac8 LP |
530 | |
531 | if (!a || a->n_rrs <= 0) | |
532 | return -ENODATA; | |
533 | ||
534 | /* Iterate through each RRSIG RR. */ | |
535 | DNS_ANSWER_FOREACH(rrsig, a) { | |
536 | DnsResourceRecord *dnskey; | |
105e1512 | 537 | DnsAnswerFlags flags; |
2b442ac8 | 538 | |
203f1b35 | 539 | /* Is this an RRSIG RR that applies to RRs matching our key? */ |
2b442ac8 LP |
540 | r = dnssec_key_match_rrsig(key, rrsig); |
541 | if (r < 0) | |
542 | return r; | |
543 | if (r == 0) | |
544 | continue; | |
545 | ||
546 | found_rrsig = true; | |
547 | ||
547973de | 548 | /* Look for a matching key */ |
105e1512 | 549 | DNS_ANSWER_FOREACH_FLAGS(dnskey, flags, validated_dnskeys) { |
547973de | 550 | DnssecResult one_result; |
2b442ac8 | 551 | |
105e1512 LP |
552 | if ((flags & DNS_ANSWER_AUTHENTICATED) == 0) |
553 | continue; | |
554 | ||
203f1b35 | 555 | /* Is this a DNSKEY RR that matches they key of our RRSIG? */ |
2b442ac8 LP |
556 | r = dnssec_rrsig_match_dnskey(rrsig, dnskey); |
557 | if (r < 0) | |
558 | return r; | |
559 | if (r == 0) | |
560 | continue; | |
561 | ||
2a326321 LP |
562 | /* Take the time here, if it isn't set yet, so |
563 | * that we do all validations with the same | |
564 | * time. */ | |
565 | if (realtime == USEC_INFINITY) | |
566 | realtime = now(CLOCK_REALTIME); | |
567 | ||
2b442ac8 LP |
568 | /* Yay, we found a matching RRSIG with a matching |
569 | * DNSKEY, awesome. Now let's verify all entries of | |
570 | * the RRSet against the RRSIG and DNSKEY | |
571 | * combination. */ | |
572 | ||
547973de | 573 | r = dnssec_verify_rrset(a, key, rrsig, dnskey, realtime, &one_result); |
203f1b35 | 574 | if (r < 0) |
2b442ac8 | 575 | return r; |
203f1b35 LP |
576 | |
577 | switch (one_result) { | |
578 | ||
579 | case DNSSEC_VALIDATED: | |
580 | /* Yay, the RR has been validated, | |
581 | * return immediately. */ | |
547973de LP |
582 | *result = DNSSEC_VALIDATED; |
583 | return 0; | |
2b442ac8 | 584 | |
203f1b35 LP |
585 | case DNSSEC_INVALID: |
586 | /* If the signature is invalid, let's try another | |
587 | key and/or signature. After all they | |
588 | key_tags and stuff are not unique, and | |
589 | might be shared by multiple keys. */ | |
590 | found_invalid = true; | |
591 | continue; | |
592 | ||
593 | case DNSSEC_UNSUPPORTED_ALGORITHM: | |
594 | /* If the key algorithm is | |
595 | unsupported, try another | |
596 | RRSIG/DNSKEY pair, but remember we | |
597 | encountered this, so that we can | |
598 | return a proper error when we | |
599 | encounter nothing better. */ | |
600 | found_unsupported_algorithm = true; | |
601 | continue; | |
602 | ||
603 | case DNSSEC_SIGNATURE_EXPIRED: | |
604 | /* If the signature is expired, try | |
605 | another one, but remember it, so | |
606 | that we can return this */ | |
607 | found_expired_rrsig = true; | |
608 | continue; | |
609 | ||
610 | default: | |
611 | assert_not_reached("Unexpected DNSSEC validation result"); | |
612 | } | |
2b442ac8 LP |
613 | } |
614 | } | |
615 | ||
203f1b35 LP |
616 | if (found_expired_rrsig) |
617 | *result = DNSSEC_SIGNATURE_EXPIRED; | |
618 | else if (found_unsupported_algorithm) | |
619 | *result = DNSSEC_UNSUPPORTED_ALGORITHM; | |
620 | else if (found_invalid) | |
547973de LP |
621 | *result = DNSSEC_INVALID; |
622 | else if (found_rrsig) | |
623 | *result = DNSSEC_MISSING_KEY; | |
624 | else | |
625 | *result = DNSSEC_NO_SIGNATURE; | |
2b442ac8 | 626 | |
547973de | 627 | return 0; |
2b442ac8 LP |
628 | } |
629 | ||
105e1512 LP |
630 | int dnssec_has_rrsig(DnsAnswer *a, const DnsResourceKey *key) { |
631 | DnsResourceRecord *rr; | |
632 | int r; | |
633 | ||
634 | /* Checks whether there's at least one RRSIG in 'a' that proctects RRs of the specified key */ | |
635 | ||
636 | DNS_ANSWER_FOREACH(rr, a) { | |
637 | r = dnssec_key_match_rrsig(key, rr); | |
638 | if (r < 0) | |
639 | return r; | |
640 | if (r > 0) | |
641 | return 1; | |
642 | } | |
643 | ||
644 | return 0; | |
645 | } | |
646 | ||
2b442ac8 | 647 | int dnssec_canonicalize(const char *n, char *buffer, size_t buffer_max) { |
2b442ac8 LP |
648 | size_t c = 0; |
649 | int r; | |
650 | ||
651 | /* Converts the specified hostname into DNSSEC canonicalized | |
652 | * form. */ | |
653 | ||
654 | if (buffer_max < 2) | |
655 | return -ENOBUFS; | |
656 | ||
657 | for (;;) { | |
658 | size_t i; | |
659 | ||
660 | r = dns_label_unescape(&n, buffer, buffer_max); | |
661 | if (r < 0) | |
662 | return r; | |
663 | if (r == 0) | |
664 | break; | |
665 | if (r > 0) { | |
666 | int k; | |
667 | ||
668 | /* DNSSEC validation is always done on the ASCII version of the label */ | |
669 | k = dns_label_apply_idna(buffer, r, buffer, buffer_max); | |
670 | if (k < 0) | |
671 | return k; | |
672 | if (k > 0) | |
673 | r = k; | |
674 | } | |
675 | ||
676 | if (buffer_max < (size_t) r + 2) | |
677 | return -ENOBUFS; | |
678 | ||
679 | /* The DNSSEC canonical form is not clear on what to | |
680 | * do with dots appearing in labels, the way DNS-SD | |
681 | * does it. Refuse it for now. */ | |
682 | ||
683 | if (memchr(buffer, '.', r)) | |
684 | return -EINVAL; | |
685 | ||
686 | for (i = 0; i < (size_t) r; i ++) { | |
687 | if (buffer[i] >= 'A' && buffer[i] <= 'Z') | |
688 | buffer[i] = buffer[i] - 'A' + 'a'; | |
689 | } | |
690 | ||
691 | buffer[r] = '.'; | |
692 | ||
693 | buffer += r + 1; | |
694 | c += r + 1; | |
695 | ||
696 | buffer_max -= r + 1; | |
697 | } | |
698 | ||
699 | if (c <= 0) { | |
700 | /* Not even a single label: this is the root domain name */ | |
701 | ||
702 | assert(buffer_max > 2); | |
703 | buffer[0] = '.'; | |
704 | buffer[1] = 0; | |
705 | ||
706 | return 1; | |
707 | } | |
708 | ||
709 | return (int) c; | |
710 | } | |
711 | ||
a1972a91 LP |
712 | static int digest_to_gcrypt(uint8_t algorithm) { |
713 | ||
714 | /* Translates a DNSSEC digest algorithm into a gcrypt digest iedntifier */ | |
715 | ||
716 | switch (algorithm) { | |
717 | ||
718 | case DNSSEC_DIGEST_SHA1: | |
719 | return GCRY_MD_SHA1; | |
720 | ||
721 | case DNSSEC_DIGEST_SHA256: | |
722 | return GCRY_MD_SHA256; | |
723 | ||
724 | default: | |
725 | return -EOPNOTSUPP; | |
726 | } | |
727 | } | |
728 | ||
2b442ac8 | 729 | int dnssec_verify_dnskey(DnsResourceRecord *dnskey, DnsResourceRecord *ds) { |
2b442ac8 | 730 | char owner_name[DNSSEC_CANONICAL_HOSTNAME_MAX]; |
a1972a91 LP |
731 | gcry_md_hd_t md = NULL; |
732 | size_t hash_size; | |
733 | int algorithm; | |
2b442ac8 LP |
734 | void *result; |
735 | int r; | |
736 | ||
737 | assert(dnskey); | |
738 | assert(ds); | |
739 | ||
740 | /* Implements DNSKEY verification by a DS, according to RFC 4035, section 5.2 */ | |
741 | ||
742 | if (dnskey->key->type != DNS_TYPE_DNSKEY) | |
743 | return -EINVAL; | |
744 | if (ds->key->type != DNS_TYPE_DS) | |
745 | return -EINVAL; | |
746 | if ((dnskey->dnskey.flags & DNSKEY_FLAG_ZONE_KEY) == 0) | |
747 | return -EKEYREJECTED; | |
748 | if (dnskey->dnskey.protocol != 3) | |
749 | return -EKEYREJECTED; | |
750 | ||
2b442ac8 LP |
751 | if (dnskey->dnskey.algorithm != ds->ds.algorithm) |
752 | return 0; | |
753 | if (dnssec_keytag(dnskey) != ds->ds.key_tag) | |
754 | return 0; | |
755 | ||
0638401a LP |
756 | initialize_libgcrypt(); |
757 | ||
a1972a91 LP |
758 | algorithm = digest_to_gcrypt(ds->ds.digest_type); |
759 | if (algorithm < 0) | |
760 | return algorithm; | |
2b442ac8 | 761 | |
a1972a91 LP |
762 | hash_size = gcry_md_get_algo_dlen(algorithm); |
763 | assert(hash_size > 0); | |
2b442ac8 | 764 | |
a1972a91 LP |
765 | if (ds->ds.digest_size != hash_size) |
766 | return 0; | |
2b442ac8 | 767 | |
a1972a91 LP |
768 | r = dnssec_canonicalize(DNS_RESOURCE_KEY_NAME(dnskey->key), owner_name, sizeof(owner_name)); |
769 | if (r < 0) | |
770 | return r; | |
2b442ac8 | 771 | |
a1972a91 | 772 | gcry_md_open(&md, algorithm, 0); |
2b442ac8 LP |
773 | if (!md) |
774 | return -EIO; | |
775 | ||
2b442ac8 LP |
776 | gcry_md_write(md, owner_name, r); |
777 | md_add_uint16(md, dnskey->dnskey.flags); | |
778 | md_add_uint8(md, dnskey->dnskey.protocol); | |
779 | md_add_uint8(md, dnskey->dnskey.algorithm); | |
780 | gcry_md_write(md, dnskey->dnskey.key, dnskey->dnskey.key_size); | |
781 | ||
782 | result = gcry_md_read(md, 0); | |
783 | if (!result) { | |
784 | r = -EIO; | |
785 | goto finish; | |
786 | } | |
787 | ||
788 | r = memcmp(result, ds->ds.digest, ds->ds.digest_size) != 0; | |
789 | ||
790 | finish: | |
791 | gcry_md_close(md); | |
792 | return r; | |
793 | } | |
24710c48 | 794 | |
547973de LP |
795 | int dnssec_verify_dnskey_search(DnsResourceRecord *dnskey, DnsAnswer *validated_ds) { |
796 | DnsResourceRecord *ds; | |
105e1512 | 797 | DnsAnswerFlags flags; |
547973de LP |
798 | int r; |
799 | ||
800 | assert(dnskey); | |
801 | ||
802 | if (dnskey->key->type != DNS_TYPE_DNSKEY) | |
803 | return 0; | |
804 | ||
105e1512 LP |
805 | DNS_ANSWER_FOREACH_FLAGS(ds, flags, validated_ds) { |
806 | ||
807 | if ((flags & DNS_ANSWER_AUTHENTICATED) == 0) | |
808 | continue; | |
547973de LP |
809 | |
810 | if (ds->key->type != DNS_TYPE_DS) | |
811 | continue; | |
812 | ||
813 | r = dnssec_verify_dnskey(dnskey, ds); | |
814 | if (r < 0) | |
815 | return r; | |
816 | if (r > 0) | |
817 | return 1; | |
818 | } | |
819 | ||
820 | return 0; | |
821 | } | |
822 | ||
72667f08 LP |
823 | int dnssec_nsec3_hash(DnsResourceRecord *nsec3, const char *name, void *ret) { |
824 | uint8_t wire_format[DNS_WIRE_FOMAT_HOSTNAME_MAX]; | |
825 | gcry_md_hd_t md = NULL; | |
826 | size_t hash_size; | |
827 | int algorithm; | |
828 | void *result; | |
829 | unsigned k; | |
830 | int r; | |
831 | ||
832 | assert(nsec3); | |
833 | assert(name); | |
834 | assert(ret); | |
835 | ||
836 | if (nsec3->key->type != DNS_TYPE_NSEC3) | |
837 | return -EINVAL; | |
838 | ||
839 | algorithm = digest_to_gcrypt(nsec3->nsec3.algorithm); | |
840 | if (algorithm < 0) | |
841 | return algorithm; | |
842 | ||
843 | initialize_libgcrypt(); | |
844 | ||
845 | hash_size = gcry_md_get_algo_dlen(algorithm); | |
846 | assert(hash_size > 0); | |
847 | ||
848 | if (nsec3->nsec3.next_hashed_name_size != hash_size) | |
849 | return -EINVAL; | |
850 | ||
851 | r = dns_name_to_wire_format(name, wire_format, sizeof(wire_format), true); | |
852 | if (r < 0) | |
853 | return r; | |
854 | ||
855 | gcry_md_open(&md, algorithm, 0); | |
856 | if (!md) | |
857 | return -EIO; | |
858 | ||
859 | gcry_md_write(md, wire_format, r); | |
860 | gcry_md_write(md, nsec3->nsec3.salt, nsec3->nsec3.salt_size); | |
861 | ||
862 | result = gcry_md_read(md, 0); | |
863 | if (!result) { | |
864 | r = -EIO; | |
865 | goto finish; | |
866 | } | |
867 | ||
868 | for (k = 0; k < nsec3->nsec3.iterations; k++) { | |
869 | uint8_t tmp[hash_size]; | |
870 | memcpy(tmp, result, hash_size); | |
871 | ||
872 | gcry_md_reset(md); | |
873 | gcry_md_write(md, tmp, hash_size); | |
874 | gcry_md_write(md, nsec3->nsec3.salt, nsec3->nsec3.salt_size); | |
875 | ||
876 | result = gcry_md_read(md, 0); | |
877 | if (!result) { | |
878 | r = -EIO; | |
879 | goto finish; | |
880 | } | |
881 | } | |
882 | ||
883 | memcpy(ret, result, hash_size); | |
884 | r = (int) hash_size; | |
885 | ||
886 | finish: | |
887 | gcry_md_close(md); | |
888 | return r; | |
889 | } | |
890 | ||
105e1512 LP |
891 | static int dnssec_test_nsec3(DnsAnswer *answer, DnsResourceKey *key, DnssecNsecResult *result) { |
892 | _cleanup_free_ char *next_closer_domain = NULL, *l = NULL; | |
893 | uint8_t hashed[DNSSEC_HASH_SIZE_MAX]; | |
894 | const char *p, *pp = NULL; | |
72667f08 | 895 | DnsResourceRecord *rr; |
105e1512 LP |
896 | DnsAnswerFlags flags; |
897 | int hashed_size, r; | |
72667f08 LP |
898 | |
899 | assert(key); | |
900 | assert(result); | |
901 | ||
105e1512 LP |
902 | /* First step, look for the closest encloser NSEC3 RR in 'answer' that matches 'key' */ |
903 | p = DNS_RESOURCE_KEY_NAME(key); | |
904 | for (;;) { | |
905 | DNS_ANSWER_FOREACH_FLAGS(rr, flags, answer) { | |
906 | _cleanup_free_ char *hashed_domain = NULL, *label = NULL; | |
72667f08 | 907 | |
105e1512 LP |
908 | if ((flags & DNS_ANSWER_AUTHENTICATED) == 0) |
909 | continue; | |
72667f08 | 910 | |
105e1512 LP |
911 | if (rr->key->type != DNS_TYPE_NSEC3) |
912 | continue; | |
72667f08 | 913 | |
105e1512 LP |
914 | /* RFC 5155, Section 8.2 says we MUST ignore NSEC3 RRs with flags != 0 or 1 */ |
915 | if (!IN_SET(rr->nsec3.flags, 0, 1)) | |
916 | continue; | |
72667f08 | 917 | |
105e1512 | 918 | r = dns_name_endswith(DNS_RESOURCE_KEY_NAME(rr->key), p); |
72667f08 LP |
919 | if (r < 0) |
920 | return r; | |
105e1512 LP |
921 | if (r == 0) |
922 | continue; | |
923 | ||
924 | hashed_size = dnssec_nsec3_hash(rr, p, hashed); | |
925 | if (hashed_size == -EOPNOTSUPP) { | |
926 | *result = DNSSEC_NSEC_UNSUPPORTED_ALGORITHM; | |
72667f08 LP |
927 | return 0; |
928 | } | |
105e1512 LP |
929 | if (hashed_size < 0) |
930 | return hashed_size; | |
931 | if (rr->nsec3.next_hashed_name_size != (size_t) hashed_size) | |
932 | return -EBADMSG; | |
72667f08 | 933 | |
105e1512 LP |
934 | label = base32hexmem(hashed, hashed_size, false); |
935 | if (!label) | |
936 | return -ENOMEM; | |
937 | ||
938 | hashed_domain = strjoin(label, ".", p, NULL); | |
939 | if (!hashed_domain) | |
940 | return -ENOMEM; | |
941 | ||
942 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), hashed_domain); | |
72667f08 LP |
943 | if (r < 0) |
944 | return r; | |
105e1512 LP |
945 | if (r > 0) |
946 | goto found; | |
947 | } | |
948 | ||
949 | /* We didn't find the closest encloser with this name, | |
950 | * but let's remember this domain name, it might be | |
951 | * the next closer name */ | |
952 | ||
953 | pp = p; | |
954 | ||
955 | /* Strip one label from the front */ | |
956 | r = dns_name_parent(&p); | |
957 | if (r < 0) | |
958 | return r; | |
959 | if (r == 0) | |
72667f08 | 960 | break; |
105e1512 | 961 | } |
72667f08 | 962 | |
105e1512 LP |
963 | *result = DNSSEC_NSEC_NO_RR; |
964 | return 0; | |
72667f08 | 965 | |
105e1512 LP |
966 | found: |
967 | /* We found a closest encloser in 'p'; next closer is 'pp' */ | |
72667f08 | 968 | |
105e1512 LP |
969 | /* Ensure this is not a DNAME domain, see RFC5155, section 8.3. */ |
970 | if (bitmap_isset(rr->nsec3.types, DNS_TYPE_DNAME)) | |
971 | return -EBADMSG; | |
72667f08 | 972 | |
105e1512 LP |
973 | /* Ensure that this data is from the delegated domain |
974 | * (i.e. originates from the "lower" DNS server), and isn't | |
975 | * just glue records (i.e. doesn't originate from the "upper" | |
976 | * DNS server). */ | |
977 | if (bitmap_isset(rr->nsec3.types, DNS_TYPE_NS) && | |
978 | !bitmap_isset(rr->nsec3.types, DNS_TYPE_SOA)) | |
979 | return -EBADMSG; | |
72667f08 | 980 | |
105e1512 LP |
981 | if (!pp) { |
982 | /* No next closer NSEC3 RR. That means there's a direct NSEC3 RR for our key. */ | |
983 | *result = bitmap_isset(rr->nsec3.types, key->type) ? DNSSEC_NSEC_FOUND : DNSSEC_NSEC_NODATA; | |
984 | return 0; | |
985 | } | |
72667f08 | 986 | |
105e1512 LP |
987 | r = dnssec_nsec3_hash(rr, pp, hashed); |
988 | if (r < 0) | |
989 | return r; | |
990 | if (r != hashed_size) | |
991 | return -EBADMSG; | |
72667f08 | 992 | |
105e1512 LP |
993 | l = base32hexmem(hashed, hashed_size, false); |
994 | if (!l) | |
995 | return -ENOMEM; | |
72667f08 | 996 | |
105e1512 LP |
997 | next_closer_domain = strjoin(l, ".", p, NULL); |
998 | if (!next_closer_domain) | |
999 | return -ENOMEM; | |
72667f08 | 1000 | |
105e1512 LP |
1001 | DNS_ANSWER_FOREACH_FLAGS(rr, flags, answer) { |
1002 | _cleanup_free_ char *label = NULL, *next_hashed_domain = NULL; | |
1003 | const char *nsec3_parent; | |
1004 | ||
1005 | if ((flags & DNS_ANSWER_AUTHENTICATED) == 0) | |
1006 | continue; | |
72667f08 | 1007 | |
105e1512 LP |
1008 | if (rr->key->type != DNS_TYPE_NSEC3) |
1009 | continue; | |
72667f08 | 1010 | |
105e1512 LP |
1011 | /* RFC 5155, Section 8.2 says we MUST ignore NSEC3 RRs with flags != 0 or 1 */ |
1012 | if (!IN_SET(rr->nsec3.flags, 0, 1)) | |
1013 | continue; | |
72667f08 | 1014 | |
105e1512 LP |
1015 | nsec3_parent = DNS_RESOURCE_KEY_NAME(rr->key); |
1016 | r = dns_name_parent(&nsec3_parent); | |
1017 | if (r < 0) | |
1018 | return r; | |
1019 | if (r == 0) | |
1020 | continue; | |
1021 | ||
1022 | r = dns_name_equal(p, nsec3_parent); | |
1023 | if (r < 0) | |
1024 | return r; | |
1025 | if (r == 0) | |
1026 | continue; | |
1027 | ||
1028 | label = base32hexmem(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, false); | |
1029 | if (!label) | |
1030 | return -ENOMEM; | |
1031 | ||
1032 | next_hashed_domain = strjoin(label, ".", p, NULL); | |
1033 | if (!next_hashed_domain) | |
1034 | return -ENOMEM; | |
1035 | ||
1036 | r = dns_name_between(DNS_RESOURCE_KEY_NAME(rr->key), next_closer_domain, next_hashed_domain); | |
1037 | if (r < 0) | |
1038 | return r; | |
1039 | if (r > 0) { | |
1040 | if (rr->nsec3.flags & 1) | |
1041 | *result = DNSSEC_NSEC_OPTOUT; | |
1042 | else | |
72667f08 | 1043 | *result = DNSSEC_NSEC_NXDOMAIN; |
105e1512 LP |
1044 | |
1045 | return 1; | |
1046 | } | |
1047 | } | |
1048 | ||
1049 | *result = DNSSEC_NSEC_NO_RR; | |
1050 | return 0; | |
1051 | } | |
1052 | ||
1053 | int dnssec_test_nsec(DnsAnswer *answer, DnsResourceKey *key, DnssecNsecResult *result) { | |
1054 | DnsResourceRecord *rr; | |
1055 | bool have_nsec3 = false; | |
1056 | DnsAnswerFlags flags; | |
1057 | int r; | |
1058 | ||
1059 | assert(key); | |
1060 | assert(result); | |
1061 | ||
1062 | /* Look for any NSEC/NSEC3 RRs that say something about the specified key. */ | |
1063 | ||
1064 | DNS_ANSWER_FOREACH_FLAGS(rr, flags, answer) { | |
1065 | ||
1066 | if (rr->key->class != key->class) | |
1067 | continue; | |
1068 | ||
1069 | if ((flags & DNS_ANSWER_AUTHENTICATED) == 0) | |
1070 | continue; | |
1071 | ||
1072 | switch (rr->key->type) { | |
1073 | ||
1074 | case DNS_TYPE_NSEC: | |
1075 | ||
1076 | r = dns_name_equal(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key)); | |
1077 | if (r < 0) | |
1078 | return r; | |
1079 | if (r > 0) { | |
1080 | *result = bitmap_isset(rr->nsec.types, key->type) ? DNSSEC_NSEC_FOUND : DNSSEC_NSEC_NODATA; | |
72667f08 LP |
1081 | return 0; |
1082 | } | |
1083 | ||
105e1512 LP |
1084 | r = dns_name_between(DNS_RESOURCE_KEY_NAME(rr->key), DNS_RESOURCE_KEY_NAME(key), rr->nsec.next_domain_name); |
1085 | if (r < 0) | |
1086 | return r; | |
1087 | if (r > 0) { | |
1088 | *result = DNSSEC_NSEC_NXDOMAIN; | |
1089 | return 0; | |
1090 | } | |
72667f08 | 1091 | break; |
72667f08 | 1092 | |
105e1512 LP |
1093 | case DNS_TYPE_NSEC3: |
1094 | have_nsec3 = true; | |
72667f08 LP |
1095 | break; |
1096 | } | |
1097 | } | |
1098 | ||
105e1512 LP |
1099 | /* OK, this was not sufficient. Let's see if NSEC3 can help. */ |
1100 | if (have_nsec3) | |
1101 | return dnssec_test_nsec3(answer, key, result); | |
1102 | ||
72667f08 LP |
1103 | /* No approproate NSEC RR found, report this. */ |
1104 | *result = DNSSEC_NSEC_NO_RR; | |
1105 | return 0; | |
1106 | } | |
1107 | ||
24710c48 LP |
1108 | static const char* const dnssec_mode_table[_DNSSEC_MODE_MAX] = { |
1109 | [DNSSEC_NO] = "no", | |
24710c48 LP |
1110 | [DNSSEC_YES] = "yes", |
1111 | }; | |
1112 | DEFINE_STRING_TABLE_LOOKUP(dnssec_mode, DnssecMode); | |
547973de LP |
1113 | |
1114 | static const char* const dnssec_result_table[_DNSSEC_RESULT_MAX] = { | |
1115 | [DNSSEC_VALIDATED] = "validated", | |
1116 | [DNSSEC_INVALID] = "invalid", | |
203f1b35 LP |
1117 | [DNSSEC_SIGNATURE_EXPIRED] = "signature-expired", |
1118 | [DNSSEC_UNSUPPORTED_ALGORITHM] = "unsupported-algorithm", | |
547973de LP |
1119 | [DNSSEC_NO_SIGNATURE] = "no-signature", |
1120 | [DNSSEC_MISSING_KEY] = "missing-key", | |
203f1b35 | 1121 | [DNSSEC_UNSIGNED] = "unsigned", |
547973de | 1122 | [DNSSEC_FAILED_AUXILIARY] = "failed-auxiliary", |
72667f08 | 1123 | [DNSSEC_NSEC_MISMATCH] = "nsec-mismatch", |
547973de LP |
1124 | }; |
1125 | DEFINE_STRING_TABLE_LOOKUP(dnssec_result, DnssecResult); |