dnssec-signzone.c 41.1 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>
Brian Wellington's avatar
Brian Wellington committed
42

43
#include <dst/result.h>
Brian Wellington's avatar
Brian Wellington committed
44

45
#define PROGRAM "dnssec-signzone"
46

47 48
/*#define USE_ZONESTATUS*/

49
#define BUFSIZE 2048
Brian Wellington's avatar
Brian Wellington committed
50

51 52 53 54 55 56 57 58 59 60 61 62 63 64
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;
};

65 66 67 68
static ISC_LIST(signer_key_t) keylist;
static isc_stdtime_t starttime = 0, endtime = 0, now;
static int cycle = -1;
static int verbose;
69
static isc_boolean_t tryverify = ISC_FALSE;
70

Brian Wellington's avatar
Brian Wellington committed
71 72
static isc_mem_t *mctx = NULL;

73
static void
74 75 76 77 78 79 80 81
fatal(char *format, ...) {
	va_list args;

	fprintf(stderr, "%s: ", PROGRAM);
	va_start(args, format);
	vfprintf(stderr, format, args);
	va_end(args);
	fprintf(stderr, "\n");
Brian Wellington's avatar
Brian Wellington committed
82 83 84 85 86 87
	exit(1);
}

static inline void
check_result(isc_result_t result, char *message) {
	if (result != ISC_R_SUCCESS) {
88
		fprintf(stderr, "%s: %s: %s\n", PROGRAM, message,
Brian Wellington's avatar
Brian Wellington committed
89 90 91 92 93 94
			isc_result_totext(result));
		exit(1);
	}
}

static void
95 96 97 98 99
vbprintf(int level, const char *fmt, ...) {
	va_list ap;
	if (level > verbose)
		return;
	va_start(ap, fmt);
100
	fprintf(stderr, "%s: ", PROGRAM);
101
	vfprintf(stderr, fmt, ap);
102 103 104 105 106 107 108 109
	va_end(ap);
}

/* Not thread-safe! */
static char *
nametostr(dns_name_t *name) {
	isc_buffer_t b;
	isc_region_t r;
110
	isc_result_t result;
111 112
	static char data[1025];

113
	isc_buffer_init(&b, data, sizeof(data));
114 115
	result = dns_name_totext(name, ISC_FALSE, &b);
	check_result(result, "dns_name_totext()");
116
	isc_buffer_usedregion(&b, &r);
117 118 119 120 121 122 123 124 125
	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;
126
	isc_result_t result;
127 128
	static char data[10];

129
	isc_buffer_init(&b, data, sizeof(data));
130 131
	result = dns_rdatatype_totext(type, &b);
	check_result(result, "dns_rdatatype_totext()");
132
	isc_buffer_usedregion(&b, &r);
133 134 135 136
	r.base[r.length] = 0;
	return (char *) r.base;
}

137 138 139
/*
 * Not thread-safe!
 */
140 141 142 143
static char *
algtostr(const dns_secalg_t alg) {
	isc_buffer_t b;
	isc_region_t r;
144
	isc_result_t result;
145 146
	static char data[10];

147
	isc_buffer_init(&b, data, sizeof(data));
148 149
	result = dns_secalg_totext(alg, &b);
	check_result(result, "dns_secalg_totext()");
150
	isc_buffer_usedregion(&b, &r);
151
	r.base[r.length] = 0;
152
	return ((char *)r.base);
153 154 155
}

static inline void
Brian Wellington's avatar
Brian Wellington committed
156
set_bit(unsigned char *array, unsigned int index, unsigned int bit) {
157
	unsigned int shift, mask;
158

Brian Wellington's avatar
Brian Wellington committed
159 160 161
	shift = 7 - (index % 8);
	mask = 1 << shift;

162
	if (bit != 0)
Brian Wellington's avatar
Brian Wellington committed
163 164 165 166 167
		array[index / 8] |= mask;
	else
		array[index / 8] &= (~mask & 0xFF);
}

168 169 170
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
171 172 173
{
	isc_result_t result;

174
	dns_rdata_init(rdata);
175
	result = dns_dnssec_sign(name, rdataset, key, &starttime, &endtime,
176
				 mctx, b, rdata);
177 178
	if (result != ISC_R_SUCCESS)
		fatal("key '%s/%s/%d' failed to sign data: %s",
179
		      nametostr(dst_key_name(key)), algtostr(dst_key_alg(key)),
180
		      dst_key_id(key), isc_result_totext(result));
181

182
	if (tryverify) {
183 184
		result = dns_dnssec_verify(name, rdataset, key,
					   ISC_TRUE, mctx, rdata);
185 186 187 188
		if (result == ISC_R_SUCCESS)
			vbprintf(3, "\tsignature verified\n");
		else
			vbprintf(3, "\tsignature failed to verify\n");
189
	}
190
}
Brian Wellington's avatar
Brian Wellington committed
191

192 193 194
static inline isc_boolean_t
issigningkey(signer_key_t *key) {
	return (key->isdefault);
Brian Wellington's avatar
Brian Wellington committed
195 196
}

197 198
static inline isc_boolean_t
iszonekey(signer_key_t *key, dns_db_t *db) {
199
	return (dns_name_equal(dst_key_name(key->key), dns_db_origin(db)) &&
200
		(dst_key_flags(key->key) & DNS_KEYFLAG_OWNERMASK) ==
201
		 DNS_KEYOWNER_ZONE);
202 203
}

204 205 206 207
/*
 * 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.
 */
208
static signer_key_t *
209
keythatsigned(dns_rdata_sig_t *sig) {
210
	isc_result_t result;
211 212 213 214 215 216 217
	dst_key_t *pubkey = NULL, *privkey = NULL;
	signer_key_t *key;

	key = ISC_LIST_HEAD(keylist);
	while (key != NULL) {
		if (sig->keyid == dst_key_id(key->key) &&
		    sig->algorithm == dst_key_alg(key->key) &&
218
		    dns_name_equal(&sig->signer, dst_key_name(key->key)))
219
			return key;
220
		key = ISC_LIST_NEXT(key, link);
221
	}
222

223
	result = dst_key_fromfile(&sig->signer, sig->keyid, sig->algorithm,
224 225 226
				  DST_TYPE_PUBLIC, mctx, &pubkey);
	if (result != ISC_R_SUCCESS)
		return (NULL);
227

228 229
	key = isc_mem_get(mctx, sizeof(signer_key_t));
	if (key == NULL)
230
		fatal("out of memory");
231

232
	result = dst_key_fromfile(&sig->signer, sig->keyid, sig->algorithm,
Brian Wellington's avatar
Brian Wellington committed
233
				  DST_TYPE_PRIVATE, mctx, &privkey);
234 235
	if (result == ISC_R_SUCCESS) {
		key->key = privkey;
236
		dst_key_free(&pubkey);
237 238 239 240 241 242
	}
	else
		key->key = pubkey;
	key->isdefault = ISC_FALSE;
	ISC_LIST_APPEND(keylist, key, link);
	return key;
243 244
}

245 246 247 248 249
/*
 * 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.
 */
250 251 252
static isc_boolean_t
expecttofindkey(dns_name_t *name, dns_db_t *db, dns_dbversion_t *version) {
	unsigned int options = DNS_DBFIND_NOWILD;
253
	dns_fixedname_t fname;
254 255
	isc_result_t result;

256
	dns_fixedname_init(&fname);
257
	result = dns_db_find(db, name, version, dns_rdatatype_key, options,
258
			     0, NULL, dns_fixedname_name(&fname), NULL, NULL);
259
	switch (result) {
260
		case ISC_R_SUCCESS:
261
		case DNS_R_NXDOMAIN:
262
		case DNS_R_NXRRSET:
263 264 265 266 267 268
			return ISC_TRUE;
		case DNS_R_DELEGATION:
		case DNS_R_CNAME:
		case DNS_R_DNAME:
			return ISC_FALSE;
		default:
269 270
			fatal("failure looking for '%s KEY' in database: %s",
			      nametostr(name), isc_result_totext(result));
271
			return ISC_FALSE; /* removes a warning */
272 273 274
	}
}

275
static inline isc_boolean_t
276 277
setverifies(dns_name_t *name, dns_rdataset_t *set, signer_key_t *key,
	    dns_rdata_t *sig)
278
{
279 280
	isc_result_t result;
	result = dns_dnssec_verify(name, set, key->key, ISC_FALSE, mctx, sig);
281
	return (ISC_TF(result == ISC_R_SUCCESS));
282 283 284 285 286 287 288 289
}

#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) \
290
		fatal("out of memory"); \
291
	isc_buffer_init(&b, tdata->array, sizeof(tdata->array));
292

293 294 295 296 297
/*
 * 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.
 */
298 299 300 301 302 303 304 305
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;
306
	dns_rdata_sig_t sig;
307
	signer_key_t *key;
308
	isc_result_t result;
309
	isc_boolean_t notsigned = ISC_TRUE, nosigs = ISC_FALSE;
310 311 312
	isc_boolean_t wassignedby[256], nowsignedby[256];
	signer_array_t *tdata;
	ISC_LIST(signer_array_t) arraylist;
313
	int i;
314 315 316 317 318 319 320 321 322 323

	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);
324 325 326 327
	if (result == ISC_R_NOTFOUND) {
		result = ISC_R_SUCCESS;
		nosigs = ISC_TRUE;
	}
328 329 330 331
	if (result != ISC_R_SUCCESS)
		fatal("failed while looking for '%s SIG %s': %s",
		      nametostr(name), typetostr(set->type),
		      isc_result_totext(result));
332

333 334
	vbprintf(1, "%s/%s:\n", nametostr(name), typetostr(set->type));

335
	if (!nosigs) {
336 337
		result = dns_rdataset_first(&oldsigset);
		while (result == ISC_R_SUCCESS) {
338
			isc_boolean_t expired, future;
339 340 341 342 343 344 345
			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");

346 347
			expired = ISC_TF(now + cycle > sig.timeexpire);
			future = ISC_TF(now < sig.timesigned);
348 349 350

			key = keythatsigned(&sig);

351 352 353 354 355 356 357 358
			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);
			}
359
			else if (key == NULL && !future &&
360
				 expecttofindkey(&sig.signer, db, version))
361 362 363 364 365 366 367 368
			{
				/* 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);
			}
369
			else if (key == NULL || future) {
370 371 372 373 374 375
				vbprintf(2, "\tsig by %s/%s/%d %s - "
					 "key not found\n",
					 expired ? "retained" : "dropped",
					 nametostr(&sig.signer),
					 algtostr(sig.algorithm),
					 sig.keyid);
376 377 378
				if (!expired)
					keep = ISC_TRUE;
			}
379 380 381 382
			else if (issigningkey(key)) {
				if (!expired &&
				    setverifies(name, set, key, &oldsigrdata))
				{
383
					vbprintf(2,
384
						"\tsig by %s/%s/%d retained\n",
385 386 387
						 nametostr(&sig.signer),
						 algtostr(sig.algorithm),
						 sig.keyid);
388 389 390 391
					keep = ISC_TRUE;
					wassignedby[sig.algorithm] = ISC_TRUE;
				}
				else {
392
					vbprintf(2,
393
						 "\tsig by %s/%s/%d dropped - "
394 395 396
						 "%s\n",
						 nametostr(&sig.signer),
						 algtostr(sig.algorithm),
397 398 399
						 sig.keyid,
						 expired ? "expired" :
							   "failed to verify");
400 401 402
					wassignedby[sig.algorithm] = ISC_TRUE;
					resign = ISC_TRUE;
				}
Brian Wellington's avatar
Brian Wellington committed
403
			}
404 405 406 407
			else if (iszonekey(key, db)) {
				if (!expired &&
				    setverifies(name, set, key, &oldsigrdata))
				{
408
					vbprintf(2,
409
						"\tsig by %s/%s/%d retained\n",
410 411 412
						 nametostr(&sig.signer),
						 algtostr(sig.algorithm),
						 sig.keyid);
413 414 415 416 417
					keep = ISC_TRUE;
					wassignedby[sig.algorithm] = ISC_TRUE;
					nowsignedby[sig.algorithm] = ISC_TRUE;
				}
				else {
418
					vbprintf(2,
419 420
						 "\tsig by %s/%s/%d "
						 "dropped - %s\n",
421 422
						 nametostr(&sig.signer),
						 algtostr(sig.algorithm),
423 424 425
						 sig.keyid,
						 expired ? "expired" :
							   "failed to verify");
426 427 428 429 430
					wassignedby[sig.algorithm] = ISC_TRUE;
					if (dst_key_isprivate(key->key))
						resign = ISC_TRUE;
				}
			}
431
			else if (!expired) {
Brian Wellington's avatar
Brian Wellington committed
432
				vbprintf(2, "\tsig by %s/%s/%d retained\n",
433 434 435
					 nametostr(&sig.signer),
					 algtostr(sig.algorithm),
					 sig.keyid);
436
				keep = ISC_TRUE;
437 438
			}
			else {
Brian Wellington's avatar
Brian Wellington committed
439
				vbprintf(2, "\tsig by %s/%s/%d expired\n",
440 441 442 443
					 nametostr(&sig.signer),
					 algtostr(sig.algorithm),
					 sig.keyid);
			}
444 445 446 447 448

			if (keep) {
				allocbufferandrdata;
				result = dns_rdata_fromstruct(trdata,
							      set->rdclass,
449
							     dns_rdatatype_sig,
450 451 452 453 454 455
							      &sig, &b);
				nowsignedby[sig.algorithm] = ISC_TRUE;
				ISC_LIST_APPEND(siglist.rdata, trdata, link);
			}
			else if (resign) {
				allocbufferandrdata;
456
				vbprintf(1, "\tresigning with key %s/%s/%d\n",
457
				       nametostr(dst_key_name(key->key)),
458 459
				       algtostr(dst_key_alg(key->key)),
				       dst_key_id(key->key));
460 461 462 463 464 465 466
				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);
467
		}
468
		if (result == ISC_R_NOMORE)
469 470 471
			result = ISC_R_SUCCESS;
		check_result(result, "dns_db_dns_rdataset_first()/next()");
		dns_rdataset_disassociate(&oldsigset);
Brian Wellington's avatar
Brian Wellington committed
472
	}
473 474 475 476 477

	for (i = 0; i < 256; i++)
		if (wassignedby[i] != 0) {
			notsigned = ISC_FALSE;
			break;
Brian Wellington's avatar
Brian Wellington committed
478
		}
479 480 481 482 483 484 485 486

	key = ISC_LIST_HEAD(keylist);
	while (key != NULL) {
		int alg = dst_key_alg(key->key);
		if (key->isdefault &&
		    (notsigned || (wassignedby[alg] && !nowsignedby[alg])))
		{
			allocbufferandrdata;
487
			vbprintf(1, "\tsigning with key %s/%s/%d\n",
488
			       nametostr(dst_key_name(key->key)),
489 490
			       algtostr(dst_key_alg(key->key)),
			       dst_key_id(key->key));
491
			signwithkey(name, set, trdata, key->key, &b);
492 493 494 495 496
			ISC_LIST_APPEND(siglist.rdata, trdata, link);
		}
		key = ISC_LIST_NEXT(key, link);
	}

497 498 499 500
	if (!ISC_LIST_EMPTY(siglist.rdata)) {
		siglist.rdclass = set->rdclass;
		siglist.type = dns_rdatatype_sig;
		siglist.covers = set->type;
501 502
		if (endtime - starttime < set->ttl)
			siglist.ttl = endtime - starttime;
503 504 505 506 507 508
		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,
509
					    0, NULL);
510 511 512 513 514 515
		if (result == DNS_R_UNCHANGED)
			result = ISC_R_SUCCESS;
		check_result(result, "dns_db_addrdataset");
		dns_rdataset_disassociate(&sigset);
	}
	else if (!nosigs) {
516 517 518 519 520 521
#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
522 523 524 525 526
		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");
527
#endif
528 529
		fatal("File is currently signed but no private keys were "
		      "found.  This won't work.");
530
	}
531 532 533 534 535 536

	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;
537
	}
Brian Wellington's avatar
Brian Wellington committed
538

539 540 541 542 543 544 545 546
	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;
	}
}

547
#ifndef USE_ZONESTATUS
548
/* Determine if a KEY set contains a null key */
549
static isc_boolean_t
550
hasnullkey(dns_rdataset_t *rdataset) {
551 552
	isc_result_t result;
	dns_rdata_t rdata;
553
	isc_boolean_t found = ISC_FALSE;
554

555
	result = dns_rdataset_first(rdataset);
556 557 558
	while (result == ISC_R_SUCCESS) {
		dst_key_t *key = NULL;

559
		dns_rdataset_current(rdataset, &rdata);
560 561
		result = dns_dnssec_keyfromrdata(dns_rootname,
						 &rdata, mctx, &key);
562 563
		if (result != ISC_R_SUCCESS)
			fatal("could not convert KEY into internal format");
564 565
		if (dst_key_isnullkey(key))
			found = ISC_TRUE;
566
                dst_key_free(&key);
567
		if (found == ISC_TRUE)
568
			return (ISC_TRUE);
569 570 571
                result = dns_rdataset_next(rdataset);
        }
        if (result != ISC_R_NOMORE)
572
                fatal("failure looking for null keys");
573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601
        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()");
602
	result = dns_db_load(newdb, (char *)filename);
603 604 605 606 607 608 609
	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);
610 611
	result = dns_db_findrdataset(newdb, newnode, NULL, dns_rdatatype_key,
				     0, 0, &newset, &sigset);
612 613 614 615 616 617 618 619 620 621
	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);
622
	check_result(result, "dns_rdataset_first()");
623 624 625
	for (; result == ISC_R_SUCCESS; result = dns_rdataset_next(set)) {
		dns_rdataset_current(set, &rdata);
		result = dns_rdataset_first(&newset);
626
		check_result(result, "dns_rdataset_first()");
627 628 629 630 631 632 633 634 635 636
		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;
637
	}
638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680
	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()");
681
	result = dns_db_load(newdb, (char *)filename);
682 683 684 685 686 687 688
	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);
689 690
	result = dns_db_findrdataset(newdb, newnode, NULL, dns_rdatatype_key,
				     0, 0, &set, &sigset);
691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730
	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);
731 732
}

733 734
/*
 * Signs all records at a name.  This mostly just signs each set individually,
735 736
 * but also adds the SIG bit to any NXTs generated earlier, deals with
 * parent/child KEY signatures, and handles other exceptional cases.
737
 */
Brian Wellington's avatar
Brian Wellington committed
738
static void
739
signname(dns_db_t *db, dns_dbversion_t *version, dns_dbnode_t *node,
Brian Wellington's avatar
Brian Wellington committed
740
	 dns_name_t *name, isc_boolean_t atorigin)
Brian Wellington's avatar
Brian Wellington committed
741 742
{
	isc_result_t result;
743
	dns_rdata_t rdata;
744
	dns_rdataset_t rdataset;
Brian Wellington's avatar
Brian Wellington committed
745
	dns_rdatasetiter_t *rdsiter;
Brian Wellington's avatar
Brian Wellington committed
746
	isc_boolean_t isdelegation = ISC_FALSE;
747
	isc_boolean_t childkey = ISC_FALSE;
748 749 750
	static int warnwild = 0;

	if (dns_name_iswildcard(name)) {
Brian Wellington's avatar
Brian Wellington committed
751 752
		if (warnwild++ == 0) {
			fprintf(stderr, "%s: warning: BIND 9 doesn't properly "
David Lawrence's avatar
David Lawrence committed
753 754
				"handle wildcards in secure zones:\n",
				PROGRAM);
Brian Wellington's avatar
Brian Wellington committed
755 756 757 758 759 760 761
			fprintf(stderr, "\t- wildcard nonexistence proof is "
				"not generated by the server\n");
			fprintf(stderr, "\t- wildcard nonexistence proof is "
				"not required by the resolver\n");
		}
		fprintf(stderr, "%s: warning: wildcard name seen: %s\n",
			PROGRAM, nametostr(name));
762
	}
763
	if (!atorigin) {
764 765
		dns_rdataset_t nsset;

766 767 768 769 770 771 772 773 774 775
		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
776 777 778 779 780 781 782
	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
783

784 785 786
		/* If this is a SIG set, skip it. */
		if (rdataset.type == dns_rdatatype_sig)
			goto skip;
Brian Wellington's avatar
Brian Wellington committed
787

788 789 790 791 792
		/*
		 * 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);
793
			goto skip;
794
		}
795 796 797

		/*
		 * If this name is a delegation point, skip all records
798 799 800
		 * 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.
801 802 803
		 */
		if (isdelegation) {
			switch (rdataset.type) {
804 805 806 807 808 809
			case dns_rdatatype_nxt:
				childkey = haschildkey(db, name);
				break;
#ifndef USE_ZONESTATUS
			case dns_rdatatype_key:
				if (hasnullkey(&rdataset))
810
					break;
811 812 813 814
				goto skip;
#endif
			default:
				goto skip;
815
			}
816

817 818
		}

819
		/*
820 821 822
		 * 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
823
		 * SIG < NXT and KEY < NXT, the easy way works.
824
		 */
825
		if (rdataset.type == dns_rdatatype_nxt) {
Brian Wellington's avatar
Brian Wellington committed
826 827 828
			unsigned char *nxt_bits;
			dns_name_t nxtname;
			isc_region_t r, r2;
829 830 831
			unsigned char keydata[4];
			dst_key_t *dstkey;
			isc_buffer_t b;
Brian Wellington's avatar
Brian Wellington committed
832 833 834 835 836 837 838 839 840 841

			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);
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
#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;
867 868 869 870
				if (result != ISC_R_SUCCESS)
					fatal("failure looking for null key "
					      "at '%s': %s", nametostr(name),
					      isc_result_totext(result));
871 872 873 874 875 876 877 878 879 880

				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;
				
881
				result = dst_key_generate(name, DNS_KEYALG_DSA,
882
							  0, 0,
883 884
							  DNS_KEYTYPE_NOKEY |
							  DNS_KEYOWNER_ZONE,
885 886
							  DNS_KEYPROTO_DNSSEC,
							  mctx, &dstkey);
887 888
				if (result != ISC_R_SUCCESS)
					fatal("failed to generate null key");
889 890
				isc_buffer_init(&b, keydata, sizeof keydata);
				result = dst_key_todns(dstkey, &b);
891
				dst_key_free(&dstkey);
892 893 894 895 896 897 898 899 900 901 902
				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;
903 904 905
				result =
					dns_rdatalist_tordataset(&keyrdatalist,
								 &keyset);
906 907 908 909 910 911 912 913 914 915 916
				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:
917
				;
918 919
			}
#endif
Brian Wellington's avatar
Brian Wellington committed
920
		}
Brian Wellington's avatar
Brian Wellington committed
921

922
		signset(db, version, node, name, &rdataset);
Brian Wellington's avatar
Brian Wellington committed
923

924
 skip:
Brian Wellington's avatar
Brian Wellington committed
925 926 927
		dns_rdataset_disassociate(&rdataset);
		result = dns_rdatasetiter_next(rdsiter);
	}
928
	if (result != ISC_R_NOMORE)
929 930
		fatal("rdataset iteration for name '%s' failed: %s",
		      nametostr(name), isc_result_totext(result));
Brian Wellington's avatar
Brian Wellington committed
931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953
	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
954
			result = ISC_R_NOMORE;
Brian Wellington's avatar
Brian Wellington committed
955
	}
956
	if (result != ISC_R_NOMORE)
957 958
		fatal("rdataset iteration failed: %s",
		      isc_result_totext(result));
Brian Wellington's avatar
Brian Wellington committed
959 960 961 962 963 964 965
	dns_rdatasetiter_destroy(&rdsiter);

	if (!active) {
		/*
		 * Make sure there is no NXT record for this node.
		 */
		result = dns_db_deleterdataset(db, node, version,
966
					       dns_rdatatype_nxt, 0);
Brian Wellington's avatar
Brian Wellington committed
967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996
		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);
}

997 998
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
999 1000
	    dns_name_t *name, dns_dbnode_t **nodep, dns_name_t *origin,
	    dns_name_t *lastcut)
1001 1002 1003 1004 1005 1006
{
	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
1007 1008