dnssec-signzone.c 28.7 KB
Newer Older
Michael Graff's avatar
Michael Graff committed
1 2
/*
 * Copyright (C) 1999  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 22 23 24 25

#include <config.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <isc/types.h>
#include <isc/assertions.h>
26
#include <isc/commandline.h>
27
#include <isc/boolean.h>
Brian Wellington's avatar
Brian Wellington committed
28 29 30 31
#include <isc/buffer.h>
#include <isc/error.h>
#include <isc/mem.h>
#include <isc/stdtime.h>
32
#include <isc/list.h>
Brian Wellington's avatar
Brian Wellington committed
33 34 35 36 37 38 39 40 41 42

#include <dns/types.h>
#include <dns/name.h>
#include <dns/fixedname.h>
#include <dns/db.h>
#include <dns/dbiterator.h>
#include <dns/rdata.h>
#include <dns/rdatalist.h>
#include <dns/rdataset.h>
#include <dns/rdatasetiter.h>
43
#include <dns/rdatastruct.h>
44
#include <dns/rdatatype.h>
Brian Wellington's avatar
Brian Wellington committed
45 46 47
#include <dns/result.h>
#include <dns/dnssec.h>
#include <dns/keyvalues.h>
48
#include <dns/secalg.h>
49
#include <dns/nxt.h>
50
#include <dns/time.h>
51
#include <dns/zone.h>
Brian Wellington's avatar
Brian Wellington committed
52 53 54

#include <dst/dst.h>

55
#define BUFSIZE 2048
Brian Wellington's avatar
Brian Wellington committed
56 57 58
#define is_zone_key(key) ((dst_key_flags(key) & DNS_KEYFLAG_OWNERMASK) \
			  == DNS_KEYOWNER_ZONE)

59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75
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;
};

ISC_LIST(signer_key_t) keylist;
isc_stdtime_t start = 0, end = 0, now;
int cycle = -1;
76
int verbose;
77

Brian Wellington's avatar
Brian Wellington committed
78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
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
96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147
vbprintf(int level, const char *fmt, ...) {
	va_list ap;
	if (level > verbose)
		return;
	va_start(ap, fmt);
	vprintf(fmt, ap);
	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];

	isc_buffer_init(&b, data, sizeof(data), ISC_BUFFERTYPE_TEXT);
	dns_name_totext(name, ISC_FALSE, &b);
	isc_buffer_used(&b, &r);
	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];

	isc_buffer_init(&b, data, sizeof(data), ISC_BUFFERTYPE_TEXT);
	dns_rdatatype_totext(type, &b);
	isc_buffer_used(&b, &r);
	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];

	isc_buffer_init(&b, data, sizeof(data), ISC_BUFFERTYPE_TEXT);
	dns_secalg_totext(alg, &b);
	isc_buffer_used(&b, &r);
	r.base[r.length] = 0;
	return (char *) r.base;
}

static inline void
Brian Wellington's avatar
Brian Wellington committed
148 149
set_bit(unsigned char *array, unsigned int index, unsigned int bit) {
	unsigned int byte, shift, mask;
150

Brian Wellington's avatar
Brian Wellington committed
151 152 153 154 155 156 157 158 159 160
	byte = array[index / 8];
	shift = 7 - (index % 8);
	mask = 1 << shift;

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

161 162 163
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
164 165 166
{
	isc_result_t result;

167 168 169 170 171 172 173 174 175 176
	dns_rdata_init(rdata);
	result = dns_dnssec_sign(name, rdataset, key, &start, &end,
				 mctx, b, rdata);
	check_result(result, "dns_dnssec_sign()");
#if 0
	/* Verify the data.  This won't work if the start time is reset */
	result = dns_dnssec_verify(name, rdataset, key, mctx, rdata);
	check_result(result, "dns_dnssec_verify()");
#endif
}
Brian Wellington's avatar
Brian Wellington committed
177

178 179 180
static inline isc_boolean_t
issigningkey(signer_key_t *key) {
	return (key->isdefault);
Brian Wellington's avatar
Brian Wellington committed
181 182
}

183 184 185 186 187
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
188

189 190 191 192
	isc_buffer_init(&b, origin, sizeof(origin), ISC_BUFFERTYPE_BINARY);
	result = dns_name_totext(dns_db_origin(db), ISC_FALSE, &b);
	check_result(result, "dns_name_totext()");

193
	return (ISC_TF(strcasecmp(dst_key_name(key->key), origin) == 0 &&
194
		(dst_key_flags(key->key) & DNS_KEYFLAG_OWNERMASK) ==
195
		 DNS_KEYOWNER_ZONE));
196 197 198 199 200
}

static signer_key_t *
keythatsigned(dns_rdata_generic_sig_t *sig) {
	char keyname[1024];
201 202
	isc_buffer_t b;
	isc_result_t result;
203 204 205
	dst_key_t *pubkey = NULL, *privkey = NULL;
	signer_key_t *key;

206
	isc_buffer_init(&b, keyname, sizeof(keyname), ISC_BUFFERTYPE_TEXT);
207
	result = dns_name_totext(&sig->signer, ISC_FALSE, &b);
208 209 210 211 212 213 214 215
	check_result(result, "dns_name_totext()");

	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;
216
		key = ISC_LIST_NEXT(key, link);
217
	}
218

219 220 221 222
	result = dst_key_fromfile(keyname, sig->keyid, sig->algorithm,
				  DST_TYPE_PUBLIC, mctx, &pubkey);
	if (result != ISC_R_SUCCESS)
		return (NULL);
223

224 225 226 227 228 229 230 231 232 233 234 235 236 237 238
	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,
				  DST_TYPE_PRIVATE, mctx, &pubkey);
	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;
239 240
}

241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258
static isc_boolean_t
expecttofindkey(dns_name_t *name, dns_db_t *db, dns_dbversion_t *version) {
	unsigned int options = DNS_DBFIND_NOWILD;
	isc_result_t result;

	result = dns_db_find(db, name, version, dns_rdatatype_key, options,
			     0, NULL, NULL, NULL, NULL);
	switch (result) {
		case DNS_R_SUCCESS:
		case DNS_R_NXDOMAIN:
		case DNS_R_NXRDATASET:
			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");
259
			return ISC_FALSE; /* removes a warning */
260 261 262 263 264 265
	}
}

static isc_boolean_t
setverifies(dns_name_t *name, dns_rdataset_t *set, signer_key_t *key,
	    dns_rdata_t *sig)
266
{
267
	isc_result_t result = dns_dnssec_verify(name, set, key->key, mctx, sig);
268
	return (ISC_TF(result == ISC_R_SUCCESS));
269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288
}

#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"); \
	isc_buffer_init(&b, tdata->array, sizeof(tdata->array), \
			ISC_BUFFERTYPE_BINARY);

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;
289
	dns_rdata_generic_sig_t sig;
290
	signer_key_t *key;
291
	isc_result_t result;
292
	isc_boolean_t notsigned = ISC_TRUE, nosigs = ISC_FALSE;
293 294 295
	isc_boolean_t wassignedby[256], nowsignedby[256];
	signer_array_t *tdata;
	ISC_LIST(signer_array_t) arraylist;
296
	int i;
297 298 299 300 301 302 303 304 305 306

	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);
307 308 309 310 311
	if (result == ISC_R_NOTFOUND) {
		result = ISC_R_SUCCESS;
		nosigs = ISC_TRUE;
	}
	check_result(result, "dns_db_findrdataset()");
312

313 314
	vbprintf(1, "%s/%s:\n", nametostr(name), typetostr(set->type));

315
	if (!nosigs) {
316 317
		result = dns_rdataset_first(&oldsigset);
		while (result == ISC_R_SUCCESS) {
318
			isc_boolean_t expired, future;
319 320 321 322 323 324 325
			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");

326 327
			expired = ISC_TF(now + cycle > sig.timeexpire);
			future = ISC_TF(now < sig.timesigned);
328 329 330

			key = keythatsigned(&sig);

331 332 333 334 335 336 337 338
			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);
			}
339
			else if (key == NULL && !future &&
340
				 expecttofindkey(&sig.signer, db, version))
341 342 343 344 345 346 347 348
			{
				/* 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);
			}
349
			else if (key == NULL || future) {
350 351 352 353 354 355
				vbprintf(2, "\tsig by %s/%s/%d %s - "
					 "key not found\n",
					 expired ? "retained" : "dropped",
					 nametostr(&sig.signer),
					 algtostr(sig.algorithm),
					 sig.keyid);
356 357 358
				if (!expired)
					keep = ISC_TRUE;
			}
359 360 361 362
			else if (issigningkey(key)) {
				if (!expired &&
				    setverifies(name, set, key, &oldsigrdata))
				{
363 364 365 366 367
					vbprintf(2,
						 "\tsig by %s/%s/%d retained\n",
						 nametostr(&sig.signer),
						 algtostr(sig.algorithm),
						 sig.keyid);
368 369 370 371
					keep = ISC_TRUE;
					wassignedby[sig.algorithm] = ISC_TRUE;
				}
				else {
372 373 374 375 376 377 378 379
					vbprintf(2,
						 "\tsig by %s/%s/%d dropped - ",
						 "%s\n",
						 expired ? "expired" :
							   "failed to verify",
						 nametostr(&sig.signer),
						 algtostr(sig.algorithm),
						 sig.keyid);
380 381 382
					wassignedby[sig.algorithm] = ISC_TRUE;
					resign = ISC_TRUE;
				}
Brian Wellington's avatar
Brian Wellington committed
383
			}
384 385 386 387
			else if (iszonekey(key, db)) {
				if (!expired &&
				    setverifies(name, set, key, &oldsigrdata))
				{
388 389 390 391 392
					vbprintf(2,
						 "\tsig by %s/%s/%d retained\n",
						 nametostr(&sig.signer),
						 algtostr(sig.algorithm),
						 sig.keyid);
393 394 395 396 397
					keep = ISC_TRUE;
					wassignedby[sig.algorithm] = ISC_TRUE;
					nowsignedby[sig.algorithm] = ISC_TRUE;
				}
				else {
398 399 400 401 402 403 404 405
					vbprintf(2,
						 "\tsig by %s/%s/%d dropped - ",
						 "%s\n",
						 expired ? "expired" :
							   "failed to verify",
						 nametostr(&sig.signer),
						 algtostr(sig.algorithm),
						 sig.keyid);
406 407 408 409 410
					wassignedby[sig.algorithm] = ISC_TRUE;
					if (dst_key_isprivate(key->key))
						resign = ISC_TRUE;
				}
			}
411 412 413 414 415
			else if (!expired) {
				vbprintf(2, "sig by %s/%s/%d retained\n",
					 nametostr(&sig.signer),
					 algtostr(sig.algorithm),
					 sig.keyid);
416
				keep = ISC_TRUE;
417 418 419 420 421 422 423
			}
			else {
				vbprintf(2, "sig by %s/%s/%d expired\n",
					 nametostr(&sig.signer),
					 algtostr(sig.algorithm),
					 sig.keyid);
			}
424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442

			if (keep) {
				allocbufferandrdata;
				result = dns_rdata_fromstruct(trdata,
							      set->rdclass,
							      dns_rdatatype_sig,
							      &sig, &b);
				nowsignedby[sig.algorithm] = ISC_TRUE;
				ISC_LIST_APPEND(siglist.rdata, trdata, link);
			}
			else if (resign) {
				allocbufferandrdata;
				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);
443
		}
444 445 446 447
		if (result == DNS_R_NOMORE)
			result = ISC_R_SUCCESS;
		check_result(result, "dns_db_dns_rdataset_first()/next()");
		dns_rdataset_disassociate(&oldsigset);
Brian Wellington's avatar
Brian Wellington committed
448
	}
449 450 451 452 453

	for (i = 0; i < 256; i++)
		if (wassignedby[i] != 0) {
			notsigned = ISC_FALSE;
			break;
Brian Wellington's avatar
Brian Wellington committed
454
		}
455 456 457 458 459 460 461 462 463

	key = ISC_LIST_HEAD(keylist);
	while (key != NULL) {
		int alg = dst_key_alg(key->key);
		if (key->isdefault &&
		    (notsigned || (wassignedby[alg] && !nowsignedby[alg])))
		{
			allocbufferandrdata;
			signwithkey(name, set, trdata, key->key, &b);
464 465 466 467
			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));
468 469 470 471 472
			ISC_LIST_APPEND(siglist.rdata, trdata, link);
		}
		key = ISC_LIST_NEXT(key, link);
	}

473 474 475 476 477 478 479 480 481 482 483 484
	if (!ISC_LIST_EMPTY(siglist.rdata)) {
		siglist.rdclass = set->rdclass;
		siglist.type = dns_rdatatype_sig;
		siglist.covers = set->type;
		if (end - start < set->ttl)
			siglist.ttl = end - start;
		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,
485
					    0, NULL);
486 487 488 489 490 491 492 493 494 495 496
		if (result == DNS_R_UNCHANGED)
			result = ISC_R_SUCCESS;
		check_result(result, "dns_db_addrdataset");
		dns_rdataset_disassociate(&sigset);
	}
	else if (!nosigs) {
	/*
		dns_db_deleterdataset(db, node, version, dns_rdatatype_sig,
				      set->type);
	*/
	}
497 498 499 500 501 502

	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;
503
	}
Brian Wellington's avatar
Brian Wellington committed
504

505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536
	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;
	}
}

static isc_boolean_t
hasnullkey(dns_rdataset_t rdataset) {
	isc_result_t result;
	dns_rdata_t rdata;
	isc_uint32_t flags;

	result = dns_rdataset_first(&rdataset);
	while (result == ISC_R_SUCCESS) {
		dst_key_t *key = NULL;

		dns_rdataset_current(&rdataset, &rdata);
		result = dns_dnssec_keyfromrdata(dns_rootname,
						 &rdata, mctx, &key);
		check_result(result, "dns_dnssec_keyfromrdata()");
		flags = dst_key_flags(key);
		dst_key_free(key);
		if (((flags & DNS_KEYFLAG_TYPEMASK) == DNS_KEYTYPE_NOKEY) &&
		    ((flags & DNS_KEYFLAG_OWNERMASK) == DNS_KEYOWNER_ZONE))
			return (ISC_TRUE);
		result = dns_rdataset_next(&rdataset);
	}
	if (result != DNS_R_NOMORE)
		check_result(result, "iteration over keys");
	return (ISC_FALSE);
537 538
}

Brian Wellington's avatar
Brian Wellington committed
539
static void
540 541
signname(dns_db_t *db, dns_dbversion_t *version, dns_dbnode_t *node,
	 dns_name_t *name)
Brian Wellington's avatar
Brian Wellington committed
542 543
{
	isc_result_t result;
544
	dns_name_t *origin;
545 546
	dns_rdata_t rdata;
	dns_rdataset_t rdataset, nsset;
Brian Wellington's avatar
Brian Wellington committed
547
	dns_rdatasetiter_t *rdsiter;
548
	isc_boolean_t atorigin = ISC_FALSE, isdelegation = ISC_FALSE;
Brian Wellington's avatar
Brian Wellington committed
549

550
	origin = dns_db_origin(db);
551
	atorigin = ISC_TF(dns_name_compare(name, origin) == 0);
552

553 554 555 556 557 558 559 560 561 562 563
	if (!atorigin) {
		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
564 565 566 567 568 569 570
	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
571

572 573 574
		/* If this is a SIG set, skip it. */
		if (rdataset.type == dns_rdatatype_sig)
			goto skip;
Brian Wellington's avatar
Brian Wellington committed
575

576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594
		/* If this is a KEY set at the apex, skip it. */
		if (rdataset.type == dns_rdatatype_key && atorigin)
			goto skip;

		/*
		 * If this name is a delegation point, skip all records
		 * except a KEY set containing a NULL key or an NXT set.
		 */
		if (isdelegation) {
			switch (rdataset.type) {
				case dns_rdatatype_nxt:
					break;
				case dns_rdatatype_key:
					if (hasnullkey(rdataset))
						break;
					goto skip;
				default:
					goto skip;
			}
595 596
		}

597
		/*
598 599 600
		 * 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
601 602
		 * SIG < NXT, the easy way works.
		 */
603
		if (rdataset.type == dns_rdatatype_nxt) {
Brian Wellington's avatar
Brian Wellington committed
604 605 606 607 608 609 610 611 612 613 614 615 616 617
			unsigned char *nxt_bits;
			dns_name_t nxtname;
			isc_region_t r, r2;

			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);
		}
Brian Wellington's avatar
Brian Wellington committed
618

619
		signset(db, version, node, name, &rdataset);
Brian Wellington's avatar
Brian Wellington committed
620

621
 skip:
Brian Wellington's avatar
Brian Wellington committed
622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692
		dns_rdataset_disassociate(&rdataset);
		result = dns_rdatasetiter_next(rdsiter);
	}
	if (result != DNS_R_NOMORE)
		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
			result = DNS_R_NOMORE;
	}
	if (result != DNS_R_NOMORE)
		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,
					       dns_rdatatype_nxt);
		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);
}

static void
693
signzone(dns_db_t *db, dns_dbversion_t *version) {
694
	isc_result_t result, nxtresult;
Brian Wellington's avatar
Brian Wellington committed
695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711
	dns_dbnode_t *node, *nextnode, *curnode;
	dns_fixedname_t fname, fnextname;
	dns_name_t *name, *nextname, *target, curname;
	dns_dbiterator_t *dbiter;
	unsigned char curdata[1024];
	isc_buffer_t curbuf;

	dns_fixedname_init(&fname);
	name = dns_fixedname_name(&fname);
	dns_fixedname_init(&fnextname);
	nextname = dns_fixedname_name(&fnextname);

	dbiter = NULL;
	result = dns_db_createiterator(db, ISC_FALSE, &dbiter);
	check_result(result, "dns_db_createiterator()");
	result = dns_dbiterator_first(dbiter);
	node = NULL;
712 713
	dns_name_clone(dns_db_origin(db), name);
	result = next_active(db, version, dbiter, name, &node);
Brian Wellington's avatar
Brian Wellington committed
714 715 716 717 718 719 720 721 722 723
	while (result == ISC_R_SUCCESS) {
		nextnode = NULL;
		curnode = NULL;
		dns_name_init(&curname, NULL);
		isc_buffer_init(&curbuf, curdata, sizeof(curdata),
				ISC_BUFFERTYPE_BINARY);
		dns_name_setbuffer(&curname, &curbuf);
		dns_dbiterator_current(dbiter, &curnode, &curname);
		result = dns_dbiterator_next(dbiter);
		if (result == ISC_R_SUCCESS)
724
			result = next_active(db, version, dbiter, nextname,
Brian Wellington's avatar
Brian Wellington committed
725 726 727 728 729 730 731 732 733
					     &nextnode);
		if (result == ISC_R_SUCCESS)
			target = nextname;
		else if (result == DNS_R_NOMORE)
			target = dns_db_origin(db);
		else {
			target = NULL;	/* Make compiler happy. */
			fatal("db iteration failed");
		}
734 735 736
		nxtresult = dns_buildnxt(db, version, node, target);
		check_result(nxtresult, "dns_buildnxt()");
		signname(db, version, node, &curname);
Brian Wellington's avatar
Brian Wellington committed
737 738 739 740 741 742 743 744
		dns_name_invalidate(&curname);
		dns_db_detachnode(db, &node);
		dns_db_detachnode(db, &curnode);
		node = nextnode;
	}
	if (result != DNS_R_NOMORE)
		fatal("db iteration failed");
	dns_dbiterator_destroy(&dbiter);
745 746 747
}

static void
748
loadzone(char *file, char *origin, dns_zone_t **zone) {
749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764
	isc_buffer_t b, b2;
	unsigned char namedata[1024];
	int len;
	dns_name_t name;
	isc_result_t result;

	len = strlen(origin);
	isc_buffer_init(&b, origin, len, ISC_BUFFERTYPE_TEXT);
	isc_buffer_add(&b, len);

	isc_buffer_init(&b2, namedata, sizeof(namedata), ISC_BUFFERTYPE_BINARY);

	dns_name_init(&name, NULL);
	result = dns_name_fromtext(&name, &b, dns_rootname, ISC_FALSE, &b2);
	check_result(result, "dns_name_fromtext()");

765 766
	result = dns_zone_create(zone, mctx);
	check_result(result, "dns_zone_create()");
767

768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791
	dns_zone_settype(*zone, dns_zone_master);

	result = dns_zone_setdbtype(*zone, "rbt");
	check_result(result, "dns_zone_setdbtype()");

	result = dns_zone_setdatabase(*zone, file);
	check_result(result, "dns_zone_setdatabase()");

	result = dns_zone_setorigin(*zone, &name);
	check_result(result, "dns_zone_origin()");

	dns_zone_setclass(*zone, dns_rdataclass_in); /* XXX */

	result = dns_zone_load(*zone);
	check_result(result, "dns_zone_load()");
}

static void
getdb(dns_zone_t *zone, dns_db_t **db, dns_dbversion_t **version) {
	isc_result_t result;

	*db = NULL;
	result = dns_zone_getdb(zone, db);
	check_result(result, "dns_zone_getdb()");
792 793 794 795 796 797 798 799 800 801 802

	result = dns_db_newversion(*db, version);
	check_result(result, "dns_db_newversion()");
}

static void
loadzonekeys(dns_db_t *db, dns_dbversion_t *version) {
	dns_name_t *origin;
	dns_dbnode_t *node;
	isc_result_t result;
	dst_key_t *keys[20];
803
	unsigned int nkeys, i;
804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828

	origin = dns_db_origin(db);

	node = NULL;
	result = dns_db_findnode(db, origin, ISC_FALSE, &node);
	check_result(result, "dns_db_findnode()");

	result = dns_dnssec_findzonekeys(db, version, node, origin, mctx,
					 20, keys, &nkeys);
	check_result(result, "dns_dnssec_findzonekeys()");

	for (i = 0; i < nkeys; i++) {
		signer_key_t *key;

		key = isc_mem_get(mctx, sizeof(signer_key_t));
		if (key == NULL)
			check_result(ISC_R_FAILURE, "isc_mem_get(key)");
		key->key = keys[i];
		key->isdefault = ISC_FALSE;

		ISC_LIST_APPEND(keylist, key, link);
	}
	dns_db_detachnode(db, &node);
}

829 830 831 832 833 834 835 836 837 838 839 840 841 842
static void
dumpzone(dns_zone_t *zone, char *filename) {
	isc_result_t result;
	FILE *fp;

	fp = fopen(filename, "w");
	if (fp == NULL) {
		fprintf(stderr, "failure opening %s\n", filename);
		exit(-1);
	}
	result = dns_zone_dump(zone, fp);
	check_result(result, "dns_zone_dump");
	fclose(fp);
}
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

static isc_stdtime_t
strtotime(char *str, isc_int64_t now, isc_int64_t base) {
	isc_int64_t val, offset;
	isc_result_t result;
	char *endp = "";

	if (str[0] == '+') {
		offset = strtol(str + 1, &endp, 0);
		val = base + offset;
	}
	else if (strncmp(str, "now+", 4) == 0) {
		offset = strtol(str + 4, &endp, 0);
		val = now + offset;
	}
	else {
		result = dns_time64_fromtext(str, &val);
		check_result(result, "dns_time64_fromtext()");
	}
	if (*endp != '\0')
		check_result(ISC_R_FAILURE, "strtol()");

	return ((isc_stdtime_t) val);
}

static void
usage() {
	fprintf(stderr, "Usage:\n");
	fprintf(stderr, "\tsigner [options] zonefile [keys]\n");

	fprintf(stderr, "\n");

Brian Wellington's avatar
Brian Wellington committed
875
	fprintf(stderr, "Options: (default value in parenthesis) \n");
876 877 878 879 880 881 882 883 884
	fprintf(stderr, "\t-s YYYYMMDDHHMMSS|+ttl:\n");
	fprintf(stderr, "\t\tSIG start time - absolute|offset (now)\n");
	fprintf(stderr, "\t-e YYYYMMDDHHMMSS|+ttl|now+ttl]:\n");
	fprintf(stderr, "\t\tSIG end time  - absolute|from start|from now (now + 30 days)\n");
	fprintf(stderr, "\t-c ttl:\n");
	fprintf(stderr, "\t\tcycle period - regenerate if < cycle from end ( (end-start)/4 )\n");
	fprintf(stderr, "\t-v level:\n");
	fprintf(stderr, "\t\tverbose level (0)\n");
	fprintf(stderr, "\t-o origin:\n");
Brian Wellington's avatar
Brian Wellington committed
885
	fprintf(stderr, "\t\tzone origin (name of zonefile)\n");
886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901
	fprintf(stderr, "\t-f outfile:\n");
	fprintf(stderr, "\t\tfile the signed zone is written in " \
			"(zonefile + .signed)\n");

	fprintf(stderr, "\n");

	fprintf(stderr, "Signing Keys:\n");
	fprintf(stderr, "\tid:\t\t");
	fprintf(stderr, "zone key with matching keyid\n");
	fprintf(stderr, "\tid/alg:\t\t");
	fprintf(stderr, "zone key with matching keyid and algorithm\n");
	fprintf(stderr, "\tname/id/alg:\t");
	fprintf(stderr, "key with matching name, keyid and algorithm\n");
	fprintf(stderr, "\tnone:\t\t");
	fprintf(stderr, "all zone keys that have private keys\n");
	exit(0);
Brian Wellington's avatar
Brian Wellington committed
902 903 904 905
}

int
main(int argc, char *argv[]) {
906 907 908 909
	int i, ch;
	char *startstr = NULL, *endstr = NULL;
	char *origin = NULL, *file = NULL, *output = NULL;
	char *endp;
910
	dns_zone_t *zone;
911 912 913
	dns_db_t *db;
	dns_dbversion_t *version;
	signer_key_t *key;
Brian Wellington's avatar
Brian Wellington committed
914 915 916 917 918 919 920
	isc_result_t result;

	dns_result_register();

	result = isc_mem_create(0, 0, &mctx);
	check_result(result, "isc_mem_create()");

921 922
	while ((ch = isc_commandline_parse(argc, argv, "s:e:c:v:o:f:h"))
	       != -1) {
923 924
		switch (ch) {
		case 's':
925 926
			startstr = isc_mem_strdup(mctx,
						  isc_commandline_argument);
927 928 929 930 931
			if (startstr == NULL)
				check_result(ISC_R_FAILURE, "isc_mem_strdup()");
			break;

		case 'e':
932 933
			endstr = isc_mem_strdup(mctx,
						isc_commandline_argument);
934 935 936 937 938 939
			if (endstr == NULL)
				check_result(ISC_R_FAILURE, "isc_mem_strdup()");
			break;

		case 'c':
			endp = NULL;
940
			cycle = strtol(isc_commandline_argument, &endp, 0);
Brian Wellington's avatar
Brian Wellington committed
941
			if (*endp != '\0')
942 943 944 945 946
				check_result(ISC_R_FAILURE, "strtol()");
			break;

		case 'v':
			endp = NULL;
947
			verbose = strtol(isc_commandline_argument, &endp, 0);
Brian Wellington's avatar
Brian Wellington committed
948
			if (*endp != '\0')
949 950 951 952
				check_result(ISC_R_FAILURE, "strtol()");
			break;

		case 'o':
953 954
			origin = isc_mem_strdup(mctx,
						isc_commandline_argument);
955 956 957 958 959
			if (origin == NULL)
				check_result(ISC_R_FAILURE, "isc_mem_strdup()");
			break;

		case 'f':
960 961
			output = isc_mem_strdup(mctx,
						isc_commandline_argument);
962 963 964 965 966 967 968 969 970 971
			if (output == NULL)
				check_result(ISC_R_FAILURE, "isc_mem_strdup()");
			break;

		case 'h':
			usage();

		}
	}

972
	isc_stdtime_get(&now);
973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991

	if (startstr != NULL) {
		start = strtotime(startstr, now, now);
		isc_mem_free(mctx, startstr);
	}
	else
		start = now;

	if (endstr != NULL) {
		end = strtotime(endstr, now, start);
		isc_mem_free(mctx, endstr);
	}
	else
		end = start + (30 * 24 * 60 * 60);

	if (cycle == -1) {
		cycle = (end - start) / 4;
	}

992 993
	argc -= isc_commandline_index;
	argv += isc_commandline_index;
994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012

	if (argc < 1)
		check_result(ISC_R_FAILURE, "No zones specified");

	file = isc_mem_strdup(mctx, argv[0]);
	if (file == NULL)
		check_result(ISC_R_FAILURE, "isc_mem_strdup()");

	argc -= 1;
	argv += 1;

	if (output == NULL) {
		output = isc_mem_allocate(mctx,
					  strlen(file) + strlen(".signed") + 1);
		if (output == NULL)
			check_result(ISC_R_FAILURE, "isc_mem_allocate()");
		sprintf(output, "%s.signed", file);
	}

1013 1014 1015 1016 1017 1018 1019 1020
	if (origin == NULL) {
		origin = isc_mem_allocate(mctx, strlen(file) + 2);
		if (origin == NULL)
			check_result(ISC_R_FAILURE, "isc_mem_allocate()");
		strcpy(origin, file);
		if (file[strlen(file) - 1] != '.')
			strcat(origin, ".");
	}
1021

1022 1023 1024
	zone = NULL;
	loadzone(file, origin, &zone);

1025 1026
	db = NULL;
	version = NULL;
1027
	getdb(zone, &db, &version);
1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043

	ISC_LIST_INIT(keylist);
	loadzonekeys(db, version);

	if (argc == 0) {
		signer_key_t *key;

		key = ISC_LIST_HEAD(keylist);
		while (key != NULL) {
			key->isdefault = ISC_TRUE;
			key = ISC_LIST_NEXT(key, link);
		}
	}
	else {
		for (i = 0; i < argc; i++) {
			int id, alg;
1044
			char *idstr = NULL, *name = NULL, *algstr = NULL, *s;
1045 1046 1047 1048 1049

			idstr = argv[i];
			algstr = strchr(idstr, '/');
			if (algstr != NULL) {
				*algstr++ = 0;
1050 1051 1052 1053 1054 1055 1056
				s = strchr(algstr, '/');
				if (s != NULL) {
					*s++ = 0;
					name = idstr;
					idstr = algstr;
					algstr = s;
				}
1057 1058 1059 1060
			}

			endp = NULL;
			id = strtol(idstr, &endp, 0);
Brian Wellington's avatar
Brian Wellington committed
1061
			if (*endp != '\0')
1062 1063 1064 1065
				check_result(ISC_R_FAILURE, "strtol");

			if (algstr != NULL) {
				endp = NULL;
1066
				alg = strtol(algstr, &endp, 0);
Brian Wellington's avatar
Brian Wellington committed
1067
				if (*endp != '\0')
1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086
					check_result(ISC_R_FAILURE, "strtol");
			}
			else
				alg = 0;

			if (name == NULL)
				name = origin;
			key = ISC_LIST_HEAD(keylist);
			while (key != NULL) {
				dst_key_t *dkey = key->key;
				if (dst_key_id(dkey) == id &&
				    (alg == 0 || dst_key_alg(dkey) == alg) &&
				    strcasecmp(name, dst_key_name(dkey)) == 0)
				{
					key->isdefault = ISC_TRUE;
					if (!dst_key_isprivate(dkey))
						check_result
							(DST_R_NOTPRIVATEKEY,
							 "key specify");
1087 1088
					if (alg == 0)
						alg = dst_key_alg(dkey);
1089 1090
					break;
				}
Brian Wellington's avatar
Brian Wellington committed
1091
				key = ISC_LIST_NEXT(key, link);
1092
			}
1093
			if (key == NULL && alg != 0) {
1094 1095 1096 1097 1098
				dst_key_t *dkey = NULL;
				result = dst_key_fromfile(name, id, alg,
							  DST_TYPE_PRIVATE,
							  mctx, &dkey);
				check_result (result, "dst_key_fromfile");
1099 1100 1101 1102
				key = isc_mem_get(mctx, sizeof(signer_key_t));
				if (key == NULL)
					check_result(ISC_R_FAILURE,
						     "isc_mem_get");
1103 1104 1105 1106
				key->key = dkey;
				key->isdefault = ISC_TRUE;
				ISC_LIST_APPEND(keylist, key, link);
			}
1107 1108
			else
				printf("Ignoring key with algorithm 0\n");
1109 1110 1111 1112 1113 1114 1115
		}
	}

	signzone(db, version);

	/* should we update the SOA serial? */
	dns_db_closeversion(db, &version, ISC_TRUE);
1116
	dumpzone(zone, output);
1117
	dns_db_detach(&db);
1118
	dns_zone_detach(&zone);
1119 1120 1121 1122 1123 1124 1125 1126

	key = ISC_LIST_HEAD(keylist);
	while (key != NULL) {
		signer_key_t *next = ISC_LIST_NEXT(key, link);
		dst_key_free(key->key);
		isc_mem_put(mctx, key, sizeof(signer_key_t));
		key = next;
	}
Brian Wellington's avatar
Brian Wellington committed
1127

1128
	isc_mem_free(mctx, origin);
1129 1130
	isc_mem_free(mctx, file);
	isc_mem_free(mctx, output);
Brian Wellington's avatar
Brian Wellington committed
1131

1132
/*	isc_mem_stats(mctx, stdout);*/
Brian Wellington's avatar
Brian Wellington committed
1133 1134 1135 1136
	isc_mem_destroy(&mctx);

	return (0);
}