dnssec-signzone.c 40.7 KB
Newer Older
Michael Graff's avatar
Michael Graff committed
1
/*
Bob Halley's avatar
Bob Halley committed
2
 * Copyright (C) 1999, 2000  Internet Software Consortium.
Bob Halley's avatar
Bob Halley committed
3
 * 
Michael Graff's avatar
Michael Graff committed
4 5 6
 * Permission to use, copy, modify, and 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.
Bob Halley's avatar
Bob Halley committed
7
 * 
Michael Graff's avatar
Michael Graff committed
8 9 10 11 12 13 14 15 16
 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
 * CONSORTIUM 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.
 */
Brian Wellington's avatar
Brian Wellington committed
17 18 19 20 21

#include <config.h>

#include <stdlib.h>

22
#include <isc/commandline.h>
Brian Wellington's avatar
Brian Wellington committed
23
#include <isc/mem.h>
24
#include <isc/string.h>
Bob Halley's avatar
Bob Halley committed
25
#include <isc/util.h>
Brian Wellington's avatar
Brian Wellington committed
26 27 28

#include <dns/db.h>
#include <dns/dbiterator.h>
29 30 31 32
#include <dns/dnssec.h>
#include <dns/keyvalues.h>
#include <dns/log.h>
#include <dns/nxt.h>
Brian Wellington's avatar
Brian Wellington committed
33 34 35 36
#include <dns/rdata.h>
#include <dns/rdatalist.h>
#include <dns/rdataset.h>
#include <dns/rdatasetiter.h>
37
#include <dns/rdatastruct.h>
38
#include <dns/rdatatype.h>
Brian Wellington's avatar
Brian Wellington committed
39
#include <dns/result.h>
40
#include <dns/secalg.h>
41
#include <dns/time.h>
42
#include <dns/zone.h>
Brian Wellington's avatar
Brian Wellington committed
43

44
#include <dst/result.h>
Brian Wellington's avatar
Brian Wellington committed
45

46 47
/*#define USE_ZONESTATUS*/

48
#define BUFSIZE 2048
Brian Wellington's avatar
Brian Wellington committed
49

50 51 52 53 54 55 56 57 58 59 60 61 62 63
typedef struct signer_key_struct signer_key_t;
typedef struct signer_array_struct signer_array_t;

struct signer_key_struct {
	dst_key_t *key;
	isc_boolean_t isdefault;
	ISC_LINK(signer_key_t) link;
};

struct signer_array_struct {
	unsigned char array[BUFSIZE];
	ISC_LINK(signer_array_t) link;
};

64 65 66 67
static ISC_LIST(signer_key_t) keylist;
static isc_stdtime_t starttime = 0, endtime = 0, now;
static int cycle = -1;
static int verbose;
68
static isc_boolean_t tryverify = ISC_FALSE;
69

Brian Wellington's avatar
Brian Wellington committed
70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87
static isc_mem_t *mctx = NULL;

static inline void
fatal(char *message) {
	fprintf(stderr, "%s\n", message);
	exit(1);
}

static inline void
check_result(isc_result_t result, char *message) {
	if (result != ISC_R_SUCCESS) {
		fprintf(stderr, "%s: %s\n", message,
			isc_result_totext(result));
		exit(1);
	}
}

static void
88 89 90 91 92
vbprintf(int level, const char *fmt, ...) {
	va_list ap;
	if (level > verbose)
		return;
	va_start(ap, fmt);
93
	vfprintf(stderr, fmt, ap);
94 95 96 97 98 99 100 101 102 103
	va_end(ap);
}

/* Not thread-safe! */
static char *
nametostr(dns_name_t *name) {
	isc_buffer_t b;
	isc_region_t r;
	static char data[1025];

104
	isc_buffer_init(&b, data, sizeof(data));
105
	dns_name_totext(name, ISC_FALSE, &b);
106
	isc_buffer_usedregion(&b, &r);
107 108 109 110 111 112 113 114 115 116 117
	r.base[r.length] = 0;
	return (char *) r.base;
}

/* Not thread-safe! */
static char *
typetostr(const dns_rdatatype_t type) {
	isc_buffer_t b;
	isc_region_t r;
	static char data[10];

118
	isc_buffer_init(&b, data, sizeof(data));
119
	dns_rdatatype_totext(type, &b);
120
	isc_buffer_usedregion(&b, &r);
121 122 123 124 125 126 127 128 129 130 131
	r.base[r.length] = 0;
	return (char *) r.base;
}

/* Not thread-safe! */
static char *
algtostr(const dns_secalg_t alg) {
	isc_buffer_t b;
	isc_region_t r;
	static char data[10];

132
	isc_buffer_init(&b, data, sizeof(data));
133
	dns_secalg_totext(alg, &b);
134
	isc_buffer_usedregion(&b, &r);
135 136 137 138 139
	r.base[r.length] = 0;
	return (char *) r.base;
}

static inline void
Brian Wellington's avatar
Brian Wellington committed
140 141
set_bit(unsigned char *array, unsigned int index, unsigned int bit) {
	unsigned int byte, shift, mask;
142

Brian Wellington's avatar
Brian Wellington committed
143 144 145 146 147 148 149 150 151 152
	byte = array[index / 8];
	shift = 7 - (index % 8);
	mask = 1 << shift;

	if (bit)
		array[index / 8] |= mask;
	else
		array[index / 8] &= (~mask & 0xFF);
}

153 154 155
static void
signwithkey(dns_name_t *name, dns_rdataset_t *rdataset, dns_rdata_t *rdata,
	    dst_key_t *key, isc_buffer_t *b)
Brian Wellington's avatar
Brian Wellington committed
156 157 158
{
	isc_result_t result;

159
	dns_rdata_init(rdata);
160
	result = dns_dnssec_sign(name, rdataset, key, &starttime, &endtime,
161 162
				 mctx, b, rdata);
	check_result(result, "dns_dnssec_sign()");
163

164
	if (tryverify) {
165 166
		result = dns_dnssec_verify(name, rdataset, key,
					   ISC_TRUE, mctx, rdata);
167 168 169 170
		if (result == ISC_R_SUCCESS)
			vbprintf(3, "\tsignature verified\n");
		else
			vbprintf(3, "\tsignature failed to verify\n");
171
	}
172
}
Brian Wellington's avatar
Brian Wellington committed
173

174 175 176
static inline isc_boolean_t
issigningkey(signer_key_t *key) {
	return (key->isdefault);
Brian Wellington's avatar
Brian Wellington committed
177 178
}

179 180 181 182 183
static inline isc_boolean_t
iszonekey(signer_key_t *key, dns_db_t *db) {
	char origin[1024];
	isc_buffer_t b;
	isc_result_t result;
Brian Wellington's avatar
Brian Wellington committed
184

185
	isc_buffer_init(&b, origin, sizeof(origin));
186 187 188
	result = dns_name_totext(dns_db_origin(db), ISC_FALSE, &b);
	check_result(result, "dns_name_totext()");

189
	return (ISC_TF(strcasecmp(dst_key_name(key->key), origin) == 0 &&
190
		(dst_key_flags(key->key) & DNS_KEYFLAG_OWNERMASK) ==
191
		 DNS_KEYOWNER_ZONE));
192 193
}

194 195 196 197
/*
 * Finds the key that generated a SIG, if possible.  First look at the keys
 * that we've loaded already, and then see if there's a key on disk.
 */
198
static signer_key_t *
199
keythatsigned(dns_rdata_sig_t *sig) {
200
	char *keyname;
201
	isc_result_t result;
202 203 204
	dst_key_t *pubkey = NULL, *privkey = NULL;
	signer_key_t *key;

205
	keyname = nametostr(&sig->signer);
206 207 208 209 210 211 212

	key = ISC_LIST_HEAD(keylist);
	while (key != NULL) {
		if (sig->keyid == dst_key_id(key->key) &&
		    sig->algorithm == dst_key_alg(key->key) &&
		    strcasecmp(keyname, dst_key_name(key->key)) == 0)
			return key;
213
		key = ISC_LIST_NEXT(key, link);
214
	}
215

216 217 218 219
	result = dst_key_fromfile(keyname, sig->keyid, sig->algorithm,
				  DST_TYPE_PUBLIC, mctx, &pubkey);
	if (result != ISC_R_SUCCESS)
		return (NULL);
220

221 222 223 224 225
	key = isc_mem_get(mctx, sizeof(signer_key_t));
	if (key == NULL)
		check_result(ISC_R_FAILURE, "isc_mem_get");

	result = dst_key_fromfile(keyname, sig->keyid, sig->algorithm,
Brian Wellington's avatar
Brian Wellington committed
226
				  DST_TYPE_PRIVATE, mctx, &privkey);
227 228 229 230 231 232 233 234 235
	if (result == ISC_R_SUCCESS) {
		key->key = privkey;
		dst_key_free(pubkey);
	}
	else
		key->key = pubkey;
	key->isdefault = ISC_FALSE;
	ISC_LIST_APPEND(keylist, key, link);
	return key;
236 237
}

238 239 240 241 242
/*
 * Check to see if we expect to find a key at this name.  If we see a SIG
 * and can't find the signing key that we expect to find, we drop the sig.
 * I'm not sure if this is completely correct, but it seems to work.
 */
243 244 245
static isc_boolean_t
expecttofindkey(dns_name_t *name, dns_db_t *db, dns_dbversion_t *version) {
	unsigned int options = DNS_DBFIND_NOWILD;
246
	dns_fixedname_t fname;
247 248
	isc_result_t result;

249
	dns_fixedname_init(&fname);
250
	result = dns_db_find(db, name, version, dns_rdatatype_key, options,
251
			     0, NULL, dns_fixedname_name(&fname), NULL, NULL);
252
	switch (result) {
253
		case ISC_R_SUCCESS:
254
		case DNS_R_NXDOMAIN:
255
		case DNS_R_NXRRSET:
256 257 258 259 260 261 262
			return ISC_TRUE;
		case DNS_R_DELEGATION:
		case DNS_R_CNAME:
		case DNS_R_DNAME:
			return ISC_FALSE;
		default:
			check_result(result, "dns_db_find");
263
			return ISC_FALSE; /* removes a warning */
264 265 266
	}
}

267
static inline isc_boolean_t
268 269
setverifies(dns_name_t *name, dns_rdataset_t *set, signer_key_t *key,
	    dns_rdata_t *sig)
270
{
271 272
	isc_result_t result;
	result = dns_dnssec_verify(name, set, key->key, ISC_FALSE, mctx, sig);
273
	return (ISC_TF(result == ISC_R_SUCCESS));
274 275 276 277 278 279 280 281 282
}

#define allocbufferandrdata \
	isc_buffer_t b; \
	trdata = isc_mem_get(mctx, sizeof(dns_rdata_t)); \
	tdata = isc_mem_get(mctx, sizeof(signer_array_t)); \
	ISC_LIST_APPEND(arraylist, tdata, link); \
	if (trdata == NULL || tdata == NULL) \
		check_result(ISC_R_FAILURE, "isc_mem_get"); \
283
	isc_buffer_init(&b, tdata->array, sizeof(tdata->array));
284

285 286 287 288 289
/*
 * Signs a set.  Goes through contortions to decide if each SIG should
 * be dropped or retained, and then determines if any new SIGs need to
 * be generated.
 */
290 291 292 293 294 295 296 297
static void
signset(dns_db_t *db, dns_dbversion_t *version, dns_dbnode_t *node,
	 dns_name_t *name, dns_rdataset_t *set)
{
	dns_rdatalist_t siglist;
	dns_rdataset_t sigset, oldsigset;
	dns_rdata_t oldsigrdata;
	dns_rdata_t *trdata;
298
	dns_rdata_sig_t sig;
299
	signer_key_t *key;
300
	isc_result_t result;
301
	isc_boolean_t notsigned = ISC_TRUE, nosigs = ISC_FALSE;
302 303 304
	isc_boolean_t wassignedby[256], nowsignedby[256];
	signer_array_t *tdata;
	ISC_LIST(signer_array_t) arraylist;
305
	int i;
306 307 308 309 310 311 312 313 314 315

	ISC_LIST_INIT(siglist.rdata);
	ISC_LIST_INIT(arraylist);

	for (i = 0; i < 256; i++)
		wassignedby[i] = nowsignedby[i] = ISC_FALSE;

	dns_rdataset_init(&oldsigset);
	result = dns_db_findrdataset(db, node, version, dns_rdatatype_sig,
				     set->type, 0, &oldsigset, NULL);
316 317 318 319 320
	if (result == ISC_R_NOTFOUND) {
		result = ISC_R_SUCCESS;
		nosigs = ISC_TRUE;
	}
	check_result(result, "dns_db_findrdataset()");
321

322 323
	vbprintf(1, "%s/%s:\n", nametostr(name), typetostr(set->type));

324
	if (!nosigs) {
325 326
		result = dns_rdataset_first(&oldsigset);
		while (result == ISC_R_SUCCESS) {
327
			isc_boolean_t expired, future;
328 329 330 331 332 333 334
			isc_boolean_t keep = ISC_FALSE, resign = ISC_FALSE;

			dns_rdataset_current(&oldsigset, &oldsigrdata);

			result = dns_rdata_tostruct(&oldsigrdata, &sig, mctx);
			check_result(result, "dns_rdata_tostruct");

335 336
			expired = ISC_TF(now + cycle > sig.timeexpire);
			future = ISC_TF(now < sig.timesigned);
337 338 339

			key = keythatsigned(&sig);

340 341 342 343 344 345 346 347
			if (sig.timesigned > sig.timeexpire) {
				/* sig is dropped and not replaced */
				vbprintf(2, "\tsig by %s/%s/%d dropped - "
					 "invalid validity period\n",
					 nametostr(&sig.signer),
					 algtostr(sig.algorithm),
					 sig.keyid);
			}
348
			else if (key == NULL && !future &&
349
				 expecttofindkey(&sig.signer, db, version))
350 351 352 353 354 355 356 357
			{
				/* sig is dropped and not replaced */
				vbprintf(2, "\tsig by %s/%s/%d dropped - "
					 "private key not found\n",
					 nametostr(&sig.signer),
					 algtostr(sig.algorithm),
					 sig.keyid);
			}
358
			else if (key == NULL || future) {
359 360 361 362 363 364
				vbprintf(2, "\tsig by %s/%s/%d %s - "
					 "key not found\n",
					 expired ? "retained" : "dropped",
					 nametostr(&sig.signer),
					 algtostr(sig.algorithm),
					 sig.keyid);
365 366 367
				if (!expired)
					keep = ISC_TRUE;
			}
368 369 370 371
			else if (issigningkey(key)) {
				if (!expired &&
				    setverifies(name, set, key, &oldsigrdata))
				{
372
					vbprintf(2,
373
						"\tsig by %s/%s/%d retained\n",
374 375 376
						 nametostr(&sig.signer),
						 algtostr(sig.algorithm),
						 sig.keyid);
377 378 379 380
					keep = ISC_TRUE;
					wassignedby[sig.algorithm] = ISC_TRUE;
				}
				else {
381
					vbprintf(2,
382
						 "\tsig by %s/%s/%d dropped - "
383 384 385
						 "%s\n",
						 nametostr(&sig.signer),
						 algtostr(sig.algorithm),
386 387 388
						 sig.keyid,
						 expired ? "expired" :
							   "failed to verify");
389 390 391
					wassignedby[sig.algorithm] = ISC_TRUE;
					resign = ISC_TRUE;
				}
Brian Wellington's avatar
Brian Wellington committed
392
			}
393 394 395 396
			else if (iszonekey(key, db)) {
				if (!expired &&
				    setverifies(name, set, key, &oldsigrdata))
				{
397
					vbprintf(2,
398
						"\tsig by %s/%s/%d retained\n",
399 400 401
						 nametostr(&sig.signer),
						 algtostr(sig.algorithm),
						 sig.keyid);
402 403 404 405 406
					keep = ISC_TRUE;
					wassignedby[sig.algorithm] = ISC_TRUE;
					nowsignedby[sig.algorithm] = ISC_TRUE;
				}
				else {
407
					vbprintf(2,
408 409
						 "\tsig by %s/%s/%d "
						 "dropped - %s\n",
410 411
						 nametostr(&sig.signer),
						 algtostr(sig.algorithm),
412 413 414
						 sig.keyid,
						 expired ? "expired" :
							   "failed to verify");
415 416 417 418 419
					wassignedby[sig.algorithm] = ISC_TRUE;
					if (dst_key_isprivate(key->key))
						resign = ISC_TRUE;
				}
			}
420
			else if (!expired) {
Brian Wellington's avatar
Brian Wellington committed
421
				vbprintf(2, "\tsig by %s/%s/%d retained\n",
422 423 424
					 nametostr(&sig.signer),
					 algtostr(sig.algorithm),
					 sig.keyid);
425
				keep = ISC_TRUE;
426 427
			}
			else {
Brian Wellington's avatar
Brian Wellington committed
428
				vbprintf(2, "\tsig by %s/%s/%d expired\n",
429 430 431 432
					 nametostr(&sig.signer),
					 algtostr(sig.algorithm),
					 sig.keyid);
			}
433 434 435 436 437

			if (keep) {
				allocbufferandrdata;
				result = dns_rdata_fromstruct(trdata,
							      set->rdclass,
438
							     dns_rdatatype_sig,
439 440 441 442 443 444
							      &sig, &b);
				nowsignedby[sig.algorithm] = ISC_TRUE;
				ISC_LIST_APPEND(siglist.rdata, trdata, link);
			}
			else if (resign) {
				allocbufferandrdata;
445 446 447 448
				vbprintf(1, "\tresigning with key %s/%s/%d\n",
				       dst_key_name(key->key),
				       algtostr(dst_key_alg(key->key)),
				       dst_key_id(key->key));
449 450 451 452 453 454 455
				signwithkey(name, set, trdata, key->key, &b);
				nowsignedby[sig.algorithm] = ISC_TRUE;
				ISC_LIST_APPEND(siglist.rdata, trdata, link);
			}

			dns_rdata_freestruct(&sig);
			result = dns_rdataset_next(&oldsigset);
456
		}
457
		if (result == ISC_R_NOMORE)
458 459 460
			result = ISC_R_SUCCESS;
		check_result(result, "dns_db_dns_rdataset_first()/next()");
		dns_rdataset_disassociate(&oldsigset);
Brian Wellington's avatar
Brian Wellington committed
461
	}
462 463 464 465 466

	for (i = 0; i < 256; i++)
		if (wassignedby[i] != 0) {
			notsigned = ISC_FALSE;
			break;
Brian Wellington's avatar
Brian Wellington committed
467
		}
468 469 470 471 472 473 474 475

	key = ISC_LIST_HEAD(keylist);
	while (key != NULL) {
		int alg = dst_key_alg(key->key);
		if (key->isdefault &&
		    (notsigned || (wassignedby[alg] && !nowsignedby[alg])))
		{
			allocbufferandrdata;
476 477 478 479
			vbprintf(1, "\tsigning with key %s/%s/%d\n",
			       dst_key_name(key->key),
			       algtostr(dst_key_alg(key->key)),
			       dst_key_id(key->key));
480
			signwithkey(name, set, trdata, key->key, &b);
481 482 483 484 485
			ISC_LIST_APPEND(siglist.rdata, trdata, link);
		}
		key = ISC_LIST_NEXT(key, link);
	}

486 487 488 489
	if (!ISC_LIST_EMPTY(siglist.rdata)) {
		siglist.rdclass = set->rdclass;
		siglist.type = dns_rdatatype_sig;
		siglist.covers = set->type;
490 491
		if (endtime - starttime < set->ttl)
			siglist.ttl = endtime - starttime;
492 493 494 495 496 497
		else
			siglist.ttl = set->ttl;
		dns_rdataset_init(&sigset);
		result = dns_rdatalist_tordataset(&siglist, &sigset);
		check_result(result, "dns_rdatalist_tordataset");
		result = dns_db_addrdataset(db, node, version, 0, &sigset,
498
					    0, NULL);
499 500 501 502 503 504
		if (result == DNS_R_UNCHANGED)
			result = ISC_R_SUCCESS;
		check_result(result, "dns_db_addrdataset");
		dns_rdataset_disassociate(&sigset);
	}
	else if (!nosigs) {
505 506 507 508 509 510
#if 0
		/*
		 * If this is compiled in, running a signed set through the
		 * signer with no private keys causes DNS_R_BADDB to occur
		 * later.  This is bad.
		 */
Brian Wellington's avatar
Brian Wellington committed
511 512 513 514 515
		result = dns_db_deleterdataset(db, node, version,
					       dns_rdatatype_sig, set->type);
		if (result == ISC_R_NOTFOUND)
			result = ISC_R_SUCCESS;
		check_result(result, "dns_db_deleterdataset");
516
#endif
517 518
		fatal("File is currently signed but no private keys were "
		      "found.  This won't work.");
519
	}
520 521 522 523 524 525

	trdata = ISC_LIST_HEAD(siglist.rdata);
	while (trdata != NULL) {
		dns_rdata_t *next = ISC_LIST_NEXT(trdata, link);
		isc_mem_put(mctx, trdata, sizeof(dns_rdata_t));
		trdata = next;
526
	}
Brian Wellington's avatar
Brian Wellington committed
527

528 529 530 531 532 533 534 535
	tdata = ISC_LIST_HEAD(arraylist);
	while (tdata != NULL) {
		signer_array_t *next = ISC_LIST_NEXT(tdata, link);
		isc_mem_put(mctx, tdata, sizeof(signer_array_t));
		tdata = next;
	}
}

536
#ifndef USE_ZONESTATUS
537
/* Determine if a KEY set contains a null key */
538
static isc_boolean_t
539
hasnullkey(dns_rdataset_t *rdataset) {
540 541
	isc_result_t result;
	dns_rdata_t rdata;
542
	isc_boolean_t found = ISC_FALSE;
543

544
	result = dns_rdataset_first(rdataset);
545 546 547
	while (result == ISC_R_SUCCESS) {
		dst_key_t *key = NULL;

548
		dns_rdataset_current(rdataset, &rdata);
549 550 551
		result = dns_dnssec_keyfromrdata(dns_rootname,
						 &rdata, mctx, &key);
		check_result(result, "dns_dnssec_keyfromrdata()");
552 553 554 555
		if (dst_key_isnullkey(key))
			found = ISC_TRUE;
                dst_key_free(key);
		if (found == ISC_TRUE)
556
			return (ISC_TRUE);
557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589
                result = dns_rdataset_next(rdataset);
        }
        if (result != ISC_R_NOMORE)
                check_result(result, "iteration over keys");
        return (ISC_FALSE);
}
#endif

/*
 * Looks for signatures of the zone keys by the parent, and imports them
 * if found.
 */
static void
importparentsig(dns_db_t *db, dns_dbversion_t *version, dns_dbnode_t *node,
		dns_name_t *name, dns_rdataset_t *set)
{
	unsigned char filename[256];
	isc_buffer_t b;
	isc_region_t r;
	dns_db_t *newdb = NULL;
	dns_dbnode_t *newnode = NULL;
	dns_rdataset_t newset, sigset;
	dns_rdata_t rdata, newrdata;
	isc_result_t result;

	isc_buffer_init(&b, filename, sizeof(filename) - 10);
	result = dns_name_totext(name, ISC_FALSE, &b);
	check_result(result, "dns_name_totext()");
	isc_buffer_usedregion(&b, &r);
	strcpy((char *)r.base + r.length, "signedkey");
	result = dns_db_create(mctx, "rbt", name, ISC_FALSE, dns_db_class(db),
			       0, NULL, &newdb);
	check_result(result, "dns_db_create()");
590
	result = dns_db_load(newdb, (char *)filename);
591 592 593 594 595 596 597
	if (result != ISC_R_SUCCESS)
		goto failure;
	result = dns_db_findnode(newdb, name, ISC_FALSE, &newnode);
	if (result != ISC_R_SUCCESS)
		goto failure;
	dns_rdataset_init(&newset);
	dns_rdataset_init(&sigset);
598 599
	result = dns_db_findrdataset(newdb, newnode, NULL, dns_rdatatype_key,
				     0, 0, &newset, &sigset);
600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624
	if (result != ISC_R_SUCCESS)
		goto failure;

	if (dns_rdataset_count(set) != dns_rdataset_count(&newset))
		goto failure;

	dns_rdata_init(&rdata);
	dns_rdata_init(&newrdata);

	result = dns_rdataset_first(set);
	check_result(result, "dns_rdata_first()");
	for (; result == ISC_R_SUCCESS; result = dns_rdataset_next(set)) {
		dns_rdataset_current(set, &rdata);
		result = dns_rdataset_first(&newset);
		check_result(result, "dns_rdata_first()");
		for (;
		     result == ISC_R_SUCCESS;
		     result = dns_rdataset_next(&newset))
		{
			dns_rdataset_current(&newset, &newrdata);
			if (dns_rdata_compare(&rdata, &newrdata) == 0)
				break;
		}
		if (result != ISC_R_SUCCESS)
			break;
625
	}
626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668
	if (result != ISC_R_NOMORE) 
		goto failure;

	vbprintf(2, "found the parent's signature of our zone key\n");

	result = dns_db_addrdataset(db, node, version, 0, &sigset, 0, NULL);
	check_result(result, "dns_db_addrdataset");
	dns_rdataset_disassociate(&newset);
	dns_rdataset_disassociate(&sigset);

 failure:
	if (newnode != NULL)
		dns_db_detachnode(newdb, &newnode);
	if (newdb != NULL)
		dns_db_detach(&newdb);
}

/*
 * Looks for our signatures of child keys.  If present, inform the caller,
 * who will set the zone status (KEY) bit in the NXT record.
 */
static isc_boolean_t
haschildkey(dns_db_t *db, dns_name_t *name) {
	unsigned char filename[256];
	isc_buffer_t b;
	isc_region_t r;
	dns_db_t *newdb = NULL;
	dns_dbnode_t *newnode = NULL;
	dns_rdataset_t set, sigset;
	dns_rdata_t sigrdata;
	isc_result_t result;
	isc_boolean_t found = ISC_FALSE;
	dns_rdata_sig_t sig;
	signer_key_t *key;

	isc_buffer_init(&b, filename, sizeof(filename) - 10);
	result = dns_name_totext(name, ISC_FALSE, &b);
	check_result(result, "dns_name_totext()");
	isc_buffer_usedregion(&b, &r);
	strcpy((char *)r.base + r.length, "signedkey");
	result = dns_db_create(mctx, "rbt", name, ISC_FALSE, dns_db_class(db),
			       0, NULL, &newdb);
	check_result(result, "dns_db_create()");
669
	result = dns_db_load(newdb, (char *)filename);
670 671 672 673 674 675 676
	if (result != ISC_R_SUCCESS)
		goto failure;
	result = dns_db_findnode(newdb, name, ISC_FALSE, &newnode);
	if (result != ISC_R_SUCCESS)
		goto failure;
	dns_rdataset_init(&set);
	dns_rdataset_init(&sigset);
677 678
	result = dns_db_findrdataset(newdb, newnode, NULL, dns_rdatatype_key,
				     0, 0, &set, &sigset);
679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718
	if (result != ISC_R_SUCCESS)
		goto failure;

	if (!dns_rdataset_isassociated(&set) ||
	    !dns_rdataset_isassociated(&sigset))
		goto disfail;

	result = dns_rdataset_first(&sigset);
	check_result(result, "dns_rdataset_first()");
	dns_rdata_init(&sigrdata);
	for (; result == ISC_R_SUCCESS; result = dns_rdataset_next(&sigset)) {
		dns_rdataset_current(&sigset, &sigrdata);
		result = dns_rdata_tostruct(&sigrdata, &sig, mctx);
		if (result != ISC_R_SUCCESS)
			goto disfail;
		key = keythatsigned(&sig);
		dns_rdata_freestruct(&sig);
		if (key == NULL)
			goto disfail;
		result = dns_dnssec_verify(name, &set, key->key,
					   ISC_FALSE, mctx, &sigrdata);
		if (result == ISC_R_SUCCESS) {
			found = ISC_TRUE;
			break;
		}
	}

 disfail:
	if (dns_rdataset_isassociated(&set))
		dns_rdataset_disassociate(&set);
	if (dns_rdataset_isassociated(&sigset))
		dns_rdataset_disassociate(&sigset);

 failure:
	if (newnode != NULL)
		dns_db_detachnode(newdb, &newnode);
	if (newdb != NULL)
		dns_db_detach(&newdb);

	return (found);
719 720
}

721 722
/*
 * Signs all records at a name.  This mostly just signs each set individually,
723 724
 * but also adds the SIG bit to any NXTs generated earlier, deals with
 * parent/child KEY signatures, and handles other exceptional cases.
725
 */
Brian Wellington's avatar
Brian Wellington committed
726
static void
727
signname(dns_db_t *db, dns_dbversion_t *version, dns_dbnode_t *node,
Brian Wellington's avatar
Brian Wellington committed
728
	 dns_name_t *name, isc_boolean_t atorigin)
Brian Wellington's avatar
Brian Wellington committed
729 730
{
	isc_result_t result;
731
	dns_rdata_t rdata;
732
	dns_rdataset_t rdataset;
Brian Wellington's avatar
Brian Wellington committed
733
	dns_rdatasetiter_t *rdsiter;
Brian Wellington's avatar
Brian Wellington committed
734
	isc_boolean_t isdelegation = ISC_FALSE;
735
	isc_boolean_t childkey = ISC_FALSE;
736 737 738 739 740 741 742 743 744
	static int warnwild = 0;

	if (dns_name_iswildcard(name)) {
		fprintf(stderr, "Warning: wildcard name seen: %s\n",
			nametostr(name));
		if (warnwild++ == 0)
			fprintf(stderr, "\tBIND 9 doesn't completely handle "
				"wildcards in secure zones\n");
	}
745
	if (!atorigin) {
746 747
		dns_rdataset_t nsset;

748 749 750 751 752 753 754 755 756 757
		dns_rdataset_init(&nsset);
		result = dns_db_findrdataset(db, node, version,
					     dns_rdatatype_ns, 0, 0, &nsset,
					     NULL);
		/* Is this a delegation point? */
		if (result == ISC_R_SUCCESS) {
			isdelegation = ISC_TRUE;
			dns_rdataset_disassociate(&nsset);
		}
	}
Brian Wellington's avatar
Brian Wellington committed
758 759 760 761 762 763 764
	dns_rdataset_init(&rdataset);
	rdsiter = NULL;
	result = dns_db_allrdatasets(db, node, version, 0, &rdsiter);
	check_result(result, "dns_db_allrdatasets()");
	result = dns_rdatasetiter_first(rdsiter);
	while (result == ISC_R_SUCCESS) {
		dns_rdatasetiter_current(rdsiter, &rdataset);
Brian Wellington's avatar
Brian Wellington committed
765

766 767 768
		/* If this is a SIG set, skip it. */
		if (rdataset.type == dns_rdatatype_sig)
			goto skip;
Brian Wellington's avatar
Brian Wellington committed
769

770 771 772 773 774
		/*
		 * If this is a KEY set at the apex, look for a signedkey file.
		 */
		if (rdataset.type == dns_rdatatype_key && atorigin) {
			importparentsig(db, version, node, name, &rdataset);
775
			goto skip;
776
		}
777 778 779

		/*
		 * If this name is a delegation point, skip all records
780 781 782
		 * except an NXT set, unless we're using null keys, in
		 * which case we need to check for a null key and add one
		 * if it's not present.
783 784 785
		 */
		if (isdelegation) {
			switch (rdataset.type) {
786 787 788 789 790 791
			case dns_rdatatype_nxt:
				childkey = haschildkey(db, name);
				break;
#ifndef USE_ZONESTATUS
			case dns_rdatatype_key:
				if (hasnullkey(&rdataset))
792
					break;
793 794 795 796
				goto skip;
#endif
			default:
				goto skip;
797
			}
798

799 800
		}

801
		/*
802 803 804
		 * There probably should be a dns_nxtsetbit, but it can get
		 * complicated if we need to extend the length of the
		 * bit set.  In this case, since the NXT bit is set and
805
		 * SIG < NXT and KEY < NXT, the easy way works.
806
		 */
807
		if (rdataset.type == dns_rdatatype_nxt) {
Brian Wellington's avatar
Brian Wellington committed
808 809 810
			unsigned char *nxt_bits;
			dns_name_t nxtname;
			isc_region_t r, r2;
811 812 813
			unsigned char keydata[4];
			dst_key_t *dstkey;
			isc_buffer_t b;
Brian Wellington's avatar
Brian Wellington committed
814 815 816 817 818 819 820 821 822 823

			result = dns_rdataset_first(&rdataset);
			check_result(result, "dns_rdataset_first()");
			dns_rdataset_current(&rdataset, &rdata);
			dns_rdata_toregion(&rdata, &r);
			dns_name_init(&nxtname, NULL);
			dns_name_fromregion(&nxtname, &r);
			dns_name_toregion(&nxtname, &r2);
			nxt_bits = r.base + r2.length;
			set_bit(nxt_bits, dns_rdatatype_sig, 1);
824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879
#ifdef USE_ZONESTATUS
			if (isdelegation && childkey) {
				set_bit(nxt_bits, dns_rdatatype_key, 1);
				vbprintf(2, "found a child key for %s, "
					 "setting KEY bit in NXT\n",
					 nametostr(name));
			}

#else
			if (isdelegation && !childkey) {
				dns_rdataset_t keyset;
				dns_rdatalist_t keyrdatalist;
				dns_rdata_t keyrdata;

				dns_rdataset_init(&keyset);
				result = dns_db_findrdataset(db, node, version,
							     dns_rdatatype_key,
							     0, 0, &keyset,
							     NULL);
				if (result == ISC_R_SUCCESS &&
				    hasnullkey(&keyset))
					goto alreadyhavenullkey;

				if (result == ISC_R_NOTFOUND)
					result = ISC_R_SUCCESS;
				check_result(result, "dns_db_findrdataset");

				if (dns_rdataset_isassociated(&keyset))
					dns_rdataset_disassociate(&keyset);

				vbprintf(2, "no child key for %s, "
					 "adding null key\n",
					 nametostr(name));
				dns_rdatalist_init(&keyrdatalist);
				dstkey = NULL;
				
				result = dst_key_generate("", DNS_KEYALG_DSA,
							  0, 0,
							  DNS_KEYTYPE_NOKEY,
							  DNS_KEYPROTO_DNSSEC,
							  mctx, &dstkey);
				check_result(result, "dst_key_generate");
				isc_buffer_init(&b, keydata, sizeof keydata);
				result = dst_key_todns(dstkey, &b);
				dst_key_free(dstkey);
				isc_buffer_usedregion(&b, &r);
				dns_rdata_fromregion(&keyrdata,
						     rdataset.rdclass,
						     dns_rdatatype_key, &r);
				
				ISC_LIST_APPEND(keyrdatalist.rdata, &keyrdata,
						link);
				keyrdatalist.rdclass = rdataset.rdclass;
				keyrdatalist.type = dns_rdatatype_key;
				keyrdatalist.covers = 0;
				keyrdatalist.ttl = rdataset.ttl;
880 881 882
				result =
					dns_rdatalist_tordataset(&keyrdatalist,
								 &keyset);
883 884 885 886 887 888 889 890 891 892 893
				check_result(result,
					     "dns_rdatalist_tordataset");
				dns_db_addrdataset(db, node, version, 0,
						   &keyset, DNS_DBADD_MERGE,
						   NULL);
				set_bit(nxt_bits, dns_rdatatype_key, 1);
				signset(db, version, node, name, &keyset);

				dns_rdataset_disassociate(&keyset);

 alreadyhavenullkey:
894
				;
895 896
			}
#endif
Brian Wellington's avatar
Brian Wellington committed
897
		}
Brian Wellington's avatar
Brian Wellington committed
898

899
		signset(db, version, node, name, &rdataset);
Brian Wellington's avatar
Brian Wellington committed
900

901
 skip:
Brian Wellington's avatar
Brian Wellington committed
902 903 904
		dns_rdataset_disassociate(&rdataset);
		result = dns_rdatasetiter_next(rdsiter);
	}
905
	if (result != ISC_R_NOMORE)
Brian Wellington's avatar
Brian Wellington committed
906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929
		fatal("rdataset iteration failed");
	dns_rdatasetiter_destroy(&rdsiter);
}

static inline isc_boolean_t
active_node(dns_db_t *db, dns_dbversion_t *version, dns_dbnode_t *node) {
	dns_rdatasetiter_t *rdsiter;
	isc_boolean_t active = ISC_FALSE;
	isc_result_t result;
	dns_rdataset_t rdataset;

	dns_rdataset_init(&rdataset);
	rdsiter = NULL;
	result = dns_db_allrdatasets(db, node, version, 0, &rdsiter);
	check_result(result, "dns_db_allrdatasets()");
	result = dns_rdatasetiter_first(rdsiter);
	while (result == ISC_R_SUCCESS) {
		dns_rdatasetiter_current(rdsiter, &rdataset);
		if (rdataset.type != dns_rdatatype_nxt)
			active = ISC_TRUE;
		dns_rdataset_disassociate(&rdataset);
		if (!active)
			result = dns_rdatasetiter_next(rdsiter);
		else
930
			result = ISC_R_NOMORE;
Brian Wellington's avatar
Brian Wellington committed
931
	}
932
	if (result != ISC_R_NOMORE)
Brian Wellington's avatar
Brian Wellington committed
933 934 935 936 937 938 939 940
		fatal("rdataset iteration failed");
	dns_rdatasetiter_destroy(&rdsiter);

	if (!active) {
		/*
		 * Make sure there is no NXT record for this node.
		 */
		result = dns_db_deleterdataset(db, node, version,
941
					       dns_rdatatype_nxt, 0);
Brian Wellington's avatar
Brian Wellington committed
942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971
		if (result == DNS_R_UNCHANGED)
			result = ISC_R_SUCCESS;
		check_result(result, "dns_db_deleterdataset");
	}

	return (active);
}

static inline isc_result_t
next_active(dns_db_t *db, dns_dbversion_t *version, dns_dbiterator_t *dbiter,
	    dns_name_t *name, dns_dbnode_t **nodep)
{
	isc_result_t result;
	isc_boolean_t active;

	do {
		active = ISC_FALSE;
		result = dns_dbiterator_current(dbiter, nodep, name);
		if (result == ISC_R_SUCCESS) {
			active = active_node(db, version, *nodep);
			if (!active) {
				dns_db_detachnode(db, nodep);
				result = dns_dbiterator_next(dbiter);
			}
		}
	} while (result == ISC_R_SUCCESS && !active);

	return (result);
}

972 973
static inline isc_result_t
next_nonglue(dns_db_t *db, dns_dbversion_t *version, dns_dbiterator_t *dbiter,
Brian Wellington's avatar
Brian Wellington committed
974 975
	    dns_name_t *name, dns_dbnode_t **nodep, dns_name_t *origin,
	    dns_name_t *lastcut)
976 977 978 979 980 981
{
	isc_result_t result;

	do {
		result = next_active(db, version, dbiter, name, nodep);
		if (result == ISC_R_SUCCESS) {
Brian Wellington's avatar
Brian Wellington committed
982 983 984
			if (dns_name_issubdomain(name, origin) &&
			    (lastcut == NULL ||
			     !dns_name_issubdomain(name, lastcut)))
985 986 987 988 989 990 991 992
				return (ISC_R_SUCCESS);
			dns_db_detachnode(db, nodep);
			result = dns_dbiterator_next(dbiter);
		}
	} while (result == ISC_R_SUCCESS);
	return (result);
}

993 994 995
/*
 * Generates NXTs and SIGs for each non-glue name in the zone.
 */
Brian Wellington's avatar
Brian Wellington committed
996
static void
997
signzone(dns_db_t *db, dns_dbversion_t *version) {
998
	isc_result_t result, nxtresult;
Brian Wellington's avatar
Brian Wellington committed
999
	dns_dbnode_t *node, *nextnode, *curnode;
Brian Wellington's avatar
Brian Wellington committed
1000
	dns_fixedname_t fname, fnextname, fcurname;
1001
	dns_name_t *name, *nextname, *target, *curname, *lastcut;
Brian Wellington's avatar
Brian Wellington committed
1002
	dns_dbiterator_t *dbiter;
Brian Wellington's avatar
Brian Wellington committed
1003
	isc_boolean_t atorigin = ISC_TRUE;
Brian Wellington's avatar
Brian Wellington committed
1004
	dns_name_t *origin;
1005 1006 1007 1008
	dns_rdataset_t soaset;
	dns_rdata_t soarr;
	dns_rdata_soa_t soa;
	dns_ttl_t zonettl;
Brian Wellington's avatar
Brian Wellington committed
1009 1010 1011 1012 1013

	dns_fixedname_init(&fname);
	name = dns_fixedname_name(&fname);
	dns_fixedname_init(&fnextname);
	nextname = dns_fixedname_name(&fnextname);
Brian Wellington's avatar
Brian Wellington committed
1014 1015
	dns_fixedname_init(&fcurname);
	curname = dns_fixedname_name(&fcurname);
Brian Wellington's avatar
Brian Wellington committed
1016

1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031
	origin = dns_db_origin(db);

	dns_rdataset_init(&soaset);
	result = dns_db_find(db, origin, version, dns_rdatatype_soa,
			     0, 0, NULL, name, &soaset, NULL);
	check_result(result, "dns_db_find");
	result = dns_rdataset_first(&soaset);
	check_result(result, "dns_rdataset_first");
	dns_rdataset_current(&soaset, &soarr);
	result = dns_rdata_tostruct(&soarr, &soa, mctx);
	check_result(result, "dns_rdataset_tostruct");
	zonettl = soa.minimum;
	dns_rdata_freestruct(&soa);
	dns_rdataset_disassociate(&soaset);

1032
	lastcut = NULL;
Brian Wellington's avatar
Brian Wellington committed
1033 1034 1035 1036 1037
	dbiter = NULL;
	result = dns_db_createiterator(db, ISC_FALSE, &dbiter);
	check_result(result, "dns_db_createiterator()");
	result = dns_dbiterator_first(dbiter);
	node = NULL;
Brian Wellington's avatar
Brian Wellington committed
1038 1039 1040
	dns_name_clone(origin, name);
	result = next_nonglue(db, version, dbiter, name, &node, origin,
			      lastcut);
Brian Wellington's avatar
Brian Wellington committed
1041 1042 1043
	while (result == ISC_R_SUCCESS) {
		nextnode = NULL;
		curnode = NULL;
Brian Wellington's avatar
Brian Wellington committed
1044
		dns_dbiterator_current(dbiter, &curnode, curname);
1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079
		if (!atorigin) {
			dns_rdatasetiter_t *rdsiter = NULL;
			dns_rdataset_t set;

			dns_rdataset_init(&set);
			result = dns_db_allrdatasets(db, curnode, version,
						     0, &rdsiter);
			check_result(result, "dns_db_allrdatasets");
			result = dns_rdatasetiter_first(rdsiter);
			while (result == ISC_R_SUCCESS) {
				dns_rdatasetiter_current(rdsiter, &set);
				if (set.type == dns_rdatatype_ns) {
					dns_rdataset_disassociate(&set);
					break;
				}
				dns_rdataset_disassociate(&set);
				result = dns_rdatasetiter_next(rdsiter);
			}
			if (result != ISC_R_SUCCESS && result != ISC_R_NOMORE)
				fatal("rdataset iteration failed");
			if (result == ISC_R_SUCCESS) {
				if (lastcut != NULL)
					dns_name_free(lastcut, mctx);
				else {
					lastcut = isc_mem_get(mctx,
							sizeof(dns_name_t));
					if (lastcut == NULL)
						fatal("allocation failure");
				}
				dns_name_init(lastcut, NULL);
				result = dns_name_dup(curname, mctx, lastcut);
				check_result(result, "dns_name_dup");
			}
			dns_rdatasetiter_destroy(&rdsiter);
		}
Brian Wellington's avatar
Brian Wellington committed
1080 1081
		result = dns_dbiterator_next(dbiter);
		if (result == ISC_R_SUCCESS)
1082
			result = next_nonglue(db, version, dbiter, nextname,
Brian Wellington's avatar
Brian Wellington committed
1083
					      &nextnode, origin, lastcut);
Brian Wellington's avatar
Brian Wellington committed
1084 1085
		if (result == ISC_R_SUCCESS)
			target = nextname;
1086
		else if (result == ISC_R_NOMORE)
Brian Wellington's avatar
Brian Wellington committed
1087
			target = origin;
Brian Wellington's avatar
Brian Wellington committed
1088 1089 1090 1091
		else {
			target = NULL;	/* Make compiler happy. */
			fatal("db iteration failed");
		}
1092
		nxtresult = dns_buildnxt(db, version, node, target, zonettl);