server.c 404 KB
Newer Older
1
/*
2
 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
3
 *
4 5 6
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
7 8 9
 *
 * See the COPYRIGHT file distributed with this work for additional
 * information regarding copyright ownership.
10 11
 */

12
/*! \file */
David Lawrence's avatar
David Lawrence committed
13

14
#include <inttypes.h>
15
#include <stdbool.h>
16
#include <stdlib.h>
17
#include <unistd.h>
18
#include <limits.h>
19 20 21
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
22

23
#include <isc/aes.h>
24
#include <isc/app.h>
25
#include <isc/base64.h>
Evan Hunt's avatar
Evan Hunt committed
26
#include <isc/commandline.h>
27
#include <isc/dir.h>
28
#include <isc/file.h>
29
#include <isc/hash.h>
30
#include <isc/hex.h>
31
#include <isc/hmac.h>
32
#include <isc/httpd.h>
33
#include <isc/lex.h>
34
#include <isc/meminfo.h>
35
#include <isc/nonce.h>
36
#include <isc/parseint.h>
Evan Hunt's avatar
Evan Hunt committed
37
#include <isc/platform.h>
38
#include <isc/portset.h>
39
#include <isc/print.h>
40
#include <isc/refcount.h>
41
#include <isc/resource.h>
42
#include <isc/siphash.h>
Mark Andrews's avatar
Mark Andrews committed
43
#include <isc/socket.h>
44
#include <isc/stat.h>
45
#include <isc/stats.h>
46
#include <isc/stdio.h>
47
#include <isc/string.h>
48
#include <isc/task.h>
49
#include <isc/timer.h>
Michael Graff's avatar
Michael Graff committed
50
#include <isc/util.h>
51

Evan Hunt's avatar
Evan Hunt committed
52
#include <isccfg/grammar.h>
53
#include <isccfg/namedconf.h>
54 55

#include <bind9/check.h>
56

57
#include <dns/adb.h>
Evan Hunt's avatar
Evan Hunt committed
58
#include <dns/badcache.h>
59
#include <dns/cache.h>
60
#include <dns/catz.h>
61
#include <dns/db.h>
Bob Halley's avatar
Bob Halley committed
62
#include <dns/dispatch.h>
63
#include <dns/dlz.h>
64
#include <dns/dnsrps.h>
65
#include <dns/dns64.h>
Evan Hunt's avatar
Evan Hunt committed
66
#include <dns/dyndb.h>
67
#include <dns/events.h>
68
#include <dns/forward.h>
69
#include <dns/fixedname.h>
70
#include <dns/journal.h>
71
#include <dns/keytable.h>
72
#include <dns/keyvalues.h>
73
#include <dns/lib.h>
74
#include <dns/master.h>
75
#include <dns/masterdump.h>
Evan Hunt's avatar
Evan Hunt committed
76
#include <dns/nta.h>
77
#include <dns/order.h>
78
#include <dns/peer.h>
79
#include <dns/portlist.h>
80
#include <dns/private.h>
81
#include <dns/rbt.h>
82
#include <dns/rdataclass.h>
83
#include <dns/rdatalist.h>
84
#include <dns/rdataset.h>
85
#include <dns/rdatastruct.h>
86
#include <dns/resolver.h>
87
#include <dns/rootns.h>
Evan Hunt's avatar
Evan Hunt committed
88
#include <dns/rriterator.h>
89
#include <dns/secalg.h>
90
#include <dns/soa.h>
91
#include <dns/stats.h>
92
#include <dns/tkey.h>
93
#include <dns/tsig.h>
Evan Hunt's avatar
Evan Hunt committed
94
#include <dns/ttl.h>
95
#include <dns/view.h>
96
#include <dns/zone.h>
97
#include <dns/zt.h>
98

99
#include <dst/dst.h>
100
#include <dst/result.h>
101

102
#include <ns/client.h>
103
#include <ns/hooks.h>
104 105 106
#include <ns/listenlist.h>
#include <ns/interfacemgr.h>

107
#include <named/config.h>
108
#include <named/control.h>
109
#if defined(HAVE_GEOIP2)
Evan Hunt's avatar
Evan Hunt committed
110
#include <named/geoip.h>
111
#endif /* HAVE_GEOIP2 */
112
#include <named/log.h>
113
#include <named/logconf.h>
114
#include <named/main.h>
115
#include <named/os.h>
Bob Halley's avatar
Bob Halley committed
116
#include <named/server.h>
117
#include <named/statschannel.h>
118 119 120
#include <named/tkeyconf.h>
#include <named/tsigconf.h>
#include <named/zoneconf.h>
121
#ifdef HAVE_LIBSCF
122
#include <named/smf_globals.h>
123 124
#include <stdlib.h>
#endif
125 126 127 128 129 130 131 132 133 134 135

#ifdef HAVE_LMDB
#include <lmdb.h>
#define count_newzones count_newzones_db
#define configure_newzones configure_newzones_db
#define dumpzone dumpzone_db
#else  /* HAVE_LMDB */
#define count_newzones count_newzones_file
#define configure_newzones configure_newzones_file
#define dumpzone dumpzone_file
#endif /* HAVE_LMDB */
136

137 138 139 140
#ifndef PATH_MAX
#define PATH_MAX 1024
#endif

141 142 143 144
#ifndef SIZE_MAX
#define SIZE_MAX ((size_t)-1)
#endif

145 146 147 148
#ifndef SIZE_AS_PERCENT
#define SIZE_AS_PERCENT ((size_t)-2)
#endif

149 150 151 152 153 154 155 156 157 158
#ifdef TUNE_LARGE
#define RESOLVER_NTASKS 523
#define UDPBUFFERS 32768
#define EXCLBUFFERS 32768
#else
#define RESOLVER_NTASKS 31
#define UDPBUFFERS 1000
#define EXCLBUFFERS 4096
#endif /* TUNE_LARGE */

159 160
#define MAX_TCP_TIMEOUT 65535

161
/*%
162 163 164 165
 * Check an operation for failure.  Assumes that the function
 * using it has a 'result' variable and a 'cleanup' label.
 */
#define CHECK(op) \
166 167
	do { result = (op);					  \
	       if (result != ISC_R_SUCCESS) goto cleanup;	  \
168 169
	} while (0)

170
#define TCHECK(op) \
171 172 173 174 175
	do { tresult = (op);					  \
		if (tresult != ISC_R_SUCCESS) {			  \
			isc_buffer_clear(*text);		  \
			goto cleanup;	 			  \
		}						  \
176 177
	} while (0)

178
#define CHECKM(op, msg) \
179
	do { result = (op);					  \
180
	       if (result != ISC_R_SUCCESS) {			  \
181
			isc_log_write(named_g_lctx,		  \
182
				      NAMED_LOGCATEGORY_GENERAL,  \
183
				      NAMED_LOGMODULE_SERVER,	  \
184 185 186 187 188 189 190
				      ISC_LOG_ERROR,		  \
				      "%s: %s", msg,		  \
				      isc_result_totext(result)); \
			goto cleanup;				  \
		}						  \
	} while (0)						  \

Mark Andrews's avatar
Mark Andrews committed
191
#define CHECKMF(op, msg, file) \
192
	do { result = (op);					  \
Mark Andrews's avatar
Mark Andrews committed
193
	       if (result != ISC_R_SUCCESS) {			  \
194
			isc_log_write(named_g_lctx,		  \
195
				      NAMED_LOGCATEGORY_GENERAL,  \
196
				      NAMED_LOGMODULE_SERVER,	  \
Mark Andrews's avatar
Mark Andrews committed
197 198 199 200 201 202 203
				      ISC_LOG_ERROR,		  \
				      "%s '%s': %s", msg, file,	  \
				      isc_result_totext(result)); \
			goto cleanup;				  \
		}						  \
	} while (0)						  \

204
#define CHECKFATAL(op, msg) \
205
	do { result = (op);					  \
206 207 208 209
	       if (result != ISC_R_SUCCESS)			  \
			fatal(msg, result);			  \
	} while (0)						  \

210 211 212 213 214 215
/*%
 * Maximum ADB size for views that share a cache.  Use this limit to suppress
 * the total of memory footprint, which should be the main reason for sharing
 * a cache.  Only effective when a finite max-cache-size is specified.
 * This is currently defined to be 8MB.
 */
Mark Andrews's avatar
Mark Andrews committed
216
#define MAX_ADB_SIZE_FOR_CACHESHARE	8388608U
217

218
struct named_dispatch {
219 220 221
	isc_sockaddr_t			addr;
	unsigned int			dispatchgen;
	dns_dispatch_t			*dispatch;
222
	ISC_LINK(struct named_dispatch)	link;
223 224
};

225
struct named_cache {
226 227
	dns_cache_t			*cache;
	dns_view_t			*primaryview;
228 229
	bool			needflush;
	bool			adbsizeadjusted;
230
	dns_rdataclass_t		rdclass;
231
	ISC_LINK(named_cache_t)		link;
232 233
};

234 235
struct dumpcontext {
	isc_mem_t			*mctx;
236 237 238 239 240
	bool			dumpcache;
	bool			dumpzones;
	bool			dumpadb;
	bool			dumpbad;
	bool			dumpfail;
241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262
	FILE				*fp;
	ISC_LIST(struct viewlistentry)	viewlist;
	struct viewlistentry		*view;
	struct zonelistentry		*zone;
	dns_dumpctx_t			*mdctx;
	dns_db_t			*db;
	dns_db_t			*cache;
	isc_task_t			*task;
	dns_dbversion_t			*version;
};

struct viewlistentry {
	dns_view_t			*view;
	ISC_LINK(struct viewlistentry)	link;
	ISC_LIST(struct zonelistentry)	zonelist;
};

struct zonelistentry {
	dns_zone_t			*zone;
	ISC_LINK(struct zonelistentry)	link;
};

263 264
/*%
 * Configuration context to retain for each view that allows
265
 * new zones to be added at runtime.
266
 */
Evan Hunt's avatar
Evan Hunt committed
267
typedef struct ns_cfgctx {
268
	isc_mem_t *			mctx;
269 270
	cfg_parser_t *			conf_parser;
	cfg_parser_t *			add_parser;
271
	cfg_obj_t *			config;
272
	cfg_obj_t *			vconfig;
273
	cfg_obj_t *			nzf_config;
274
	cfg_aclconfctx_t *		actx;
Evan Hunt's avatar
Evan Hunt committed
275
} ns_cfgctx_t;
276

277 278 279 280 281 282
/*%
 * A function to write out added-zone configuration to the new_zone_file
 * specified in 'view'. Maybe called by delete_zoneconf().
 */
typedef isc_result_t (*nzfwriter_t)(const cfg_obj_t *config, dns_view_t *view);

283 284 285 286 287 288
/*%
 * Holds state information for the initial zone loading process.
 * Uses the isc_refcount structure to count the number of views
 * with pending zone loads, dereferencing as each view finishes.
 */
typedef struct {
289
		named_server_t *server;
290
		bool reconfig;
291 292 293
		isc_refcount_t refs;
} ns_zoneload_t;

294
typedef struct {
295
	named_server_t *server;
296 297 298 299 300 301 302 303
} catz_cb_data_t;

typedef struct catz_chgzone_event {
	ISC_EVENT_COMMON(struct catz_chgzone_event);
	dns_catz_entry_t *entry;
	dns_catz_zone_t *origin;
	dns_view_t *view;
	catz_cb_data_t *cbd;
304
	bool mod;
305 306
} catz_chgzone_event_t;

Mark Andrews's avatar
Mark Andrews committed
307 308 309 310 311 312 313
typedef struct {
	unsigned int magic;
#define DZARG_MAGIC		ISC_MAGIC('D', 'z', 'a', 'r')
	isc_buffer_t **text;
	isc_result_t result;
} ns_dzarg_t;

314 315 316
/*
 * These zones should not leak onto the Internet.
 */
317
const char *empty_zones[] = {
318
	/* RFC 1918 */
319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336
	"10.IN-ADDR.ARPA",
	"16.172.IN-ADDR.ARPA",
	"17.172.IN-ADDR.ARPA",
	"18.172.IN-ADDR.ARPA",
	"19.172.IN-ADDR.ARPA",
	"20.172.IN-ADDR.ARPA",
	"21.172.IN-ADDR.ARPA",
	"22.172.IN-ADDR.ARPA",
	"23.172.IN-ADDR.ARPA",
	"24.172.IN-ADDR.ARPA",
	"25.172.IN-ADDR.ARPA",
	"26.172.IN-ADDR.ARPA",
	"27.172.IN-ADDR.ARPA",
	"28.172.IN-ADDR.ARPA",
	"29.172.IN-ADDR.ARPA",
	"30.172.IN-ADDR.ARPA",
	"31.172.IN-ADDR.ARPA",
	"168.192.IN-ADDR.ARPA",
337

338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403
	/* RFC 6598 */
	"64.100.IN-ADDR.ARPA",
	"65.100.IN-ADDR.ARPA",
	"66.100.IN-ADDR.ARPA",
	"67.100.IN-ADDR.ARPA",
	"68.100.IN-ADDR.ARPA",
	"69.100.IN-ADDR.ARPA",
	"70.100.IN-ADDR.ARPA",
	"71.100.IN-ADDR.ARPA",
	"72.100.IN-ADDR.ARPA",
	"73.100.IN-ADDR.ARPA",
	"74.100.IN-ADDR.ARPA",
	"75.100.IN-ADDR.ARPA",
	"76.100.IN-ADDR.ARPA",
	"77.100.IN-ADDR.ARPA",
	"78.100.IN-ADDR.ARPA",
	"79.100.IN-ADDR.ARPA",
	"80.100.IN-ADDR.ARPA",
	"81.100.IN-ADDR.ARPA",
	"82.100.IN-ADDR.ARPA",
	"83.100.IN-ADDR.ARPA",
	"84.100.IN-ADDR.ARPA",
	"85.100.IN-ADDR.ARPA",
	"86.100.IN-ADDR.ARPA",
	"87.100.IN-ADDR.ARPA",
	"88.100.IN-ADDR.ARPA",
	"89.100.IN-ADDR.ARPA",
	"90.100.IN-ADDR.ARPA",
	"91.100.IN-ADDR.ARPA",
	"92.100.IN-ADDR.ARPA",
	"93.100.IN-ADDR.ARPA",
	"94.100.IN-ADDR.ARPA",
	"95.100.IN-ADDR.ARPA",
	"96.100.IN-ADDR.ARPA",
	"97.100.IN-ADDR.ARPA",
	"98.100.IN-ADDR.ARPA",
	"99.100.IN-ADDR.ARPA",
	"100.100.IN-ADDR.ARPA",
	"101.100.IN-ADDR.ARPA",
	"102.100.IN-ADDR.ARPA",
	"103.100.IN-ADDR.ARPA",
	"104.100.IN-ADDR.ARPA",
	"105.100.IN-ADDR.ARPA",
	"106.100.IN-ADDR.ARPA",
	"107.100.IN-ADDR.ARPA",
	"108.100.IN-ADDR.ARPA",
	"109.100.IN-ADDR.ARPA",
	"110.100.IN-ADDR.ARPA",
	"111.100.IN-ADDR.ARPA",
	"112.100.IN-ADDR.ARPA",
	"113.100.IN-ADDR.ARPA",
	"114.100.IN-ADDR.ARPA",
	"115.100.IN-ADDR.ARPA",
	"116.100.IN-ADDR.ARPA",
	"117.100.IN-ADDR.ARPA",
	"118.100.IN-ADDR.ARPA",
	"119.100.IN-ADDR.ARPA",
	"120.100.IN-ADDR.ARPA",
	"121.100.IN-ADDR.ARPA",
	"122.100.IN-ADDR.ARPA",
	"123.100.IN-ADDR.ARPA",
	"124.100.IN-ADDR.ARPA",
	"125.100.IN-ADDR.ARPA",
	"126.100.IN-ADDR.ARPA",
	"127.100.IN-ADDR.ARPA",

404
	/* RFC 5735 and RFC 5737 */
405 406 407 408 409 410 411
	"0.IN-ADDR.ARPA",	/* THIS NETWORK */
	"127.IN-ADDR.ARPA",	/* LOOPBACK */
	"254.169.IN-ADDR.ARPA",	/* LINK LOCAL */
	"2.0.192.IN-ADDR.ARPA",	/* TEST NET */
	"100.51.198.IN-ADDR.ARPA",	/* TEST NET 2 */
	"113.0.203.IN-ADDR.ARPA",	/* TEST NET 3 */
	"255.255.255.255.IN-ADDR.ARPA",	/* BROADCAST */
412 413

	/* Local IPv6 Unicast Addresses */
414 415
	"0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.IP6.ARPA",
	"1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.IP6.ARPA",
Francis Dupont's avatar
Francis Dupont committed
416
	/* LOCALLY ASSIGNED LOCAL ADDRESS SCOPE */
417 418 419 420 421
	"D.F.IP6.ARPA",
	"8.E.F.IP6.ARPA",	/* LINK LOCAL */
	"9.E.F.IP6.ARPA",	/* LINK LOCAL */
	"A.E.F.IP6.ARPA",	/* LINK LOCAL */
	"B.E.F.IP6.ARPA",	/* LINK LOCAL */
422

423
	/* Example Prefix, RFC 3849. */
424
	"8.B.D.0.1.0.0.2.IP6.ARPA",
425

426 427 428
	/* RFC 7534 */
	"EMPTY.AS112.ARPA",

429 430 431
	/* RFC 8375 */
	"HOME.ARPA",

432
	NULL
433 434
};

Francis Dupont's avatar
Francis Dupont committed
435 436
ISC_PLATFORM_NORETURN_PRE static void
fatal(const char *msg, isc_result_t result) ISC_PLATFORM_NORETURN_POST;
David Lawrence's avatar
David Lawrence committed
437 438

static void
439
named_server_reload(isc_task_t *task, isc_event_t *event);
440

441
static isc_result_t
442
ns_listenelt_fromconfig(const cfg_obj_t *listener, const cfg_obj_t *config,
443
			cfg_aclconfctx_t *actx, isc_mem_t *mctx,
444
			uint16_t family, ns_listenelt_t **target);
445
static isc_result_t
446
ns_listenlist_fromconfig(const cfg_obj_t *listenlist, const cfg_obj_t *config,
447
			 cfg_aclconfctx_t *actx, isc_mem_t *mctx,
448
			 uint16_t family, ns_listenlist_t **target);
449

450
static isc_result_t
451
configure_forward(const cfg_obj_t *config, dns_view_t *view,
452 453
		  const dns_name_t *origin, const cfg_obj_t *forwarders,
		  const cfg_obj_t *forwardtype);
454

455
static isc_result_t
456 457
configure_alternates(const cfg_obj_t *config, dns_view_t *view,
		     const cfg_obj_t *alternates);
458

459
static isc_result_t
460 461
configure_zone(const cfg_obj_t *config, const cfg_obj_t *zconfig,
	       const cfg_obj_t *vconfig, isc_mem_t *mctx, dns_view_t *view,
Evan Hunt's avatar
Evan Hunt committed
462
	       dns_viewlist_t *viewlist, cfg_aclconfctx_t *aclconf,
463 464
	       bool added, bool old_rpz_ok,
	       bool modify);
465

466 467 468 469
static isc_result_t
configure_newzones(dns_view_t *view, cfg_obj_t *config, cfg_obj_t *vconfig,
		   isc_mem_t *mctx, cfg_aclconfctx_t *actx);

470
static isc_result_t
471
add_keydata_zone(dns_view_t *view, const char *directory, isc_mem_t *mctx);
472

473
static void
474
end_reserved_dispatches(named_server_t *server, bool all);
475

476
static void
477
newzone_cfgctx_destroy(void **cfgp);
478

Mark Andrews's avatar
Mark Andrews committed
479
static inline isc_result_t
480
putstr(isc_buffer_t **b, const char *str);
481

482
static isc_result_t
483 484 485
putmem(isc_buffer_t **b, const char *str, size_t len);

static isc_result_t
486
putuint8(isc_buffer_t **b, uint8_t val);
487

Mark Andrews's avatar
Mark Andrews committed
488
static inline isc_result_t
489
putnull(isc_buffer_t **b);
490

491 492 493 494 495 496 497
static int
count_zones(const cfg_obj_t *conf);

#ifdef HAVE_LMDB
static isc_result_t
migrate_nzf(dns_view_t *view);

498 499 500
static isc_result_t
nzd_writable(dns_view_t *view);

501 502 503
static isc_result_t
nzd_open(dns_view_t *view, unsigned int flags, MDB_txn **txnp, MDB_dbi *dbi);

504 505 506 507 508 509
static isc_result_t
nzd_env_reopen(dns_view_t *view);

static void
nzd_env_close(dns_view_t *view);

510
static isc_result_t
511
nzd_close(MDB_txn **txnp, bool commit);
512 513 514 515

static isc_result_t
nzd_count(dns_view_t *view, int *countp);
#else
Evan Hunt's avatar
Evan Hunt committed
516
static isc_result_t
517 518
nzf_append(dns_view_t *view, const cfg_obj_t *zconfig);
#endif
Evan Hunt's avatar
Evan Hunt committed
519

520
/*%
Tatuya JINMEI 神明達哉's avatar
Tatuya JINMEI 神明達哉 committed
521 522
 * Configure a single view ACL at '*aclp'.  Get its configuration from
 * 'vconfig' (for per-view configuration) and maybe from 'config'
523 524
 */
static isc_result_t
525
configure_view_acl(const cfg_obj_t *vconfig, const cfg_obj_t *config,
526 527 528
		   const cfg_obj_t *gconfig, const char *aclname,
		   const char *acltuplename, cfg_aclconfctx_t *actx,
		   isc_mem_t *mctx, dns_acl_t **aclp)
529 530
{
	isc_result_t result;
531
	const cfg_obj_t *maps[4];
532
	const cfg_obj_t *aclobj = NULL;
533 534
	int i = 0;

535
	if (*aclp != NULL) {
536
		dns_acl_detach(aclp);
537 538
	}
	if (vconfig != NULL) {
539
		maps[i++] = cfg_tuple_get(vconfig, "options");
540
	}
541
	if (config != NULL) {
542
		const cfg_obj_t *options = NULL;
543
		(void)cfg_map_get(config, "options", &options);
544
		if (options != NULL) {
545
			maps[i++] = options;
546 547 548 549 550 551 552 553
		}
	}
	if (gconfig != NULL) {
		const cfg_obj_t *options = NULL;
		(void)cfg_map_get(gconfig, "options", &options);
		if (options != NULL) {
			maps[i++] = options;
		}
554 555
	}
	maps[i] = NULL;
556

557
	(void)named_config_get(maps, aclname, &aclobj);
558
	if (aclobj == NULL) {
559
		/*
560
		 * No value available.	*aclp == NULL.
561
		 */
562
		return (ISC_R_SUCCESS);
563
	}
564

565 566 567 568 569 570 571 572 573
	if (acltuplename != NULL) {
		/*
		 * If the ACL is given in an optional tuple, retrieve it.
		 * The parser should have ensured that a valid object be
		 * returned.
		 */
		aclobj = cfg_tuple_get(aclobj, acltuplename);
	}

574
	result = cfg_acl_fromconfig(aclobj, config, named_g_lctx,
575 576 577 578 579 580 581 582 583 584 585 586
				    actx, mctx, 0, aclp);

	return (result);
}

/*%
 * Configure a sortlist at '*aclp'.  Essentially the same as
 * configure_view_acl() except it calls cfg_acl_fromconfig with a
 * nest_level value of 2.
 */
static isc_result_t
configure_view_sortlist(const cfg_obj_t *vconfig, const cfg_obj_t *config,
Automatic Updater's avatar
Automatic Updater committed
587 588
			cfg_aclconfctx_t *actx, isc_mem_t *mctx,
			dns_acl_t **aclp)
589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606
{
	isc_result_t result;
	const cfg_obj_t *maps[3];
	const cfg_obj_t *aclobj = NULL;
	int i = 0;

	if (*aclp != NULL)
		dns_acl_detach(aclp);
	if (vconfig != NULL)
		maps[i++] = cfg_tuple_get(vconfig, "options");
	if (config != NULL) {
		const cfg_obj_t *options = NULL;
		(void)cfg_map_get(config, "options", &options);
		if (options != NULL)
			maps[i++] = options;
	}
	maps[i] = NULL;

607
	(void)named_config_get(maps, "sortlist", &aclobj);
608 609 610
	if (aclobj == NULL)
		return (ISC_R_SUCCESS);

Automatic Updater's avatar
Automatic Updater committed
611 612 613 614 615 616
	/*
	 * Use a nest level of 3 for the "top level" of the sortlist;
	 * this means each entry in the top three levels will be stored
	 * as lists of separate, nested ACLs, rather than merged together
	 * into IP tables as is usually done with ACLs.
	 */
617
	result = cfg_acl_fromconfig(aclobj, config, named_g_lctx,
618
				    actx, mctx, 3, aclp);
619 620 621 622

	return (result);
}

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
static isc_result_t
configure_view_nametable(const cfg_obj_t *vconfig, const cfg_obj_t *config,
			 const char *confname, const char *conftuplename,
			 isc_mem_t *mctx, dns_rbt_t **rbtp)
{
	isc_result_t result;
	const cfg_obj_t *maps[3];
	const cfg_obj_t *obj = NULL;
	const cfg_listelt_t *element;
	int i = 0;
	dns_fixedname_t fixed;
	dns_name_t *name;
	isc_buffer_t b;
	const char *str;
	const cfg_obj_t *nameobj;

	if (*rbtp != NULL)
		dns_rbt_destroy(rbtp);
	if (vconfig != NULL)
		maps[i++] = cfg_tuple_get(vconfig, "options");
	if (config != NULL) {
		const cfg_obj_t *options = NULL;
		(void)cfg_map_get(config, "options", &options);
		if (options != NULL)
			maps[i++] = options;
	}
	maps[i] = NULL;

651
	(void)named_config_get(maps, confname, &obj);
652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667
	if (obj == NULL)
		/*
		 * No value available.	*rbtp == NULL.
		 */
		return (ISC_R_SUCCESS);

	if (conftuplename != NULL) {
		obj = cfg_tuple_get(obj, conftuplename);
		if (cfg_obj_isvoid(obj))
			return (ISC_R_SUCCESS);
	}

	result = dns_rbt_create(mctx, NULL, NULL, rbtp);
	if (result != ISC_R_SUCCESS)
		return (result);

668
	name = dns_fixedname_initname(&fixed);
669 670 671 672 673
	for (element = cfg_list_first(obj);
	     element != NULL;
	     element = cfg_list_next(element)) {
		nameobj = cfg_listelt_value(element);
		str = cfg_obj_asstring(nameobj);
674
		isc_buffer_constinit(&b, str, strlen(str));
675
		isc_buffer_add(&b, strlen(str));
676
		CHECK(dns_name_fromtext(name, &b, dns_rootname, 0, NULL));
677 678 679 680 681 682 683
		/*
		 * We don't need the node data, but need to set dummy data to
		 * avoid a partial match with an empty node.  For example, if
		 * we have foo.example.com and bar.example.com, we'd get a match
		 * for baz.example.com, which is not the expected result.
		 * We simply use (void *)1 as the dummy data.
		 */
684 685
		result = dns_rbt_addname(*rbtp, name, (void *)1);
		if (result != ISC_R_SUCCESS) {
686
			cfg_obj_log(nameobj, named_g_lctx, ISC_LOG_ERROR,
687 688 689 690
				    "failed to add %s for %s: %s",
				    str, confname, isc_result_totext(result));
			goto cleanup;
		}
Automatic Updater's avatar
Automatic Updater committed
691

692 693 694 695 696 697 698
	}

	return (result);

  cleanup:
	dns_rbt_destroy(rbtp);
	return (result);
Automatic Updater's avatar
Automatic Updater committed
699

700 701
}

702
static isc_result_t
Evan Hunt's avatar
Evan Hunt committed
703 704
dstkey_fromconfig(const cfg_obj_t *key, bool *initialp, dst_key_t **target,
		  const char **keynamestrp, isc_mem_t *mctx)
705
{
706
	dns_rdata_dnskey_t keystruct;
707
	uint32_t flags, proto, alg;
708
	const char *keystr, *keynamestr;
709 710 711 712 713 714 715 716 717 718 719
	unsigned char keydata[4096];
	isc_buffer_t keydatabuf;
	unsigned char rrdata[4096];
	isc_buffer_t rrdatabuf;
	isc_region_t r;
	dns_fixedname_t fkeyname;
	dns_name_t *keyname;
	isc_buffer_t namebuf;
	isc_result_t result;
	dst_key_t *dstkey = NULL;

720
	INSIST(target != NULL && *target == NULL);
721
	INSIST(keynamestrp != NULL && *keynamestrp == NULL);
722

723 724 725 726 727
	flags = cfg_obj_asuint32(cfg_tuple_get(key, "flags"));
	proto = cfg_obj_asuint32(cfg_tuple_get(key, "protocol"));
	alg = cfg_obj_asuint32(cfg_tuple_get(key, "algorithm"));
	keyname = dns_fixedname_name(&fkeyname);
	keynamestr = cfg_obj_asstring(cfg_tuple_get(key, "name"));
728
	*keynamestrp = keynamestr;
729

Evan Hunt's avatar
Evan Hunt committed
730
	if (*initialp) {
Automatic Updater's avatar
Automatic Updater committed
731 732 733
		const char *initmethod;
		initmethod = cfg_obj_asstring(cfg_tuple_get(key, "init"));

Evan Hunt's avatar
Evan Hunt committed
734 735 736
		if (strcasecmp(initmethod, "static-key") == 0) {
			*initialp = false;
		} else if (strcasecmp(initmethod, "initial-key") != 0) {
737
			cfg_obj_log(key, named_g_lctx, ISC_LOG_ERROR,
Evan Hunt's avatar
Evan Hunt committed
738
				    "key '%s': "
Automatic Updater's avatar
Automatic Updater committed
739 740 741 742 743 744
				    "invalid initialization method '%s'",
				    keynamestr, initmethod);
			result = ISC_R_FAILURE;
			goto cleanup;
		}
	}
745

Evan Hunt's avatar
Evan Hunt committed
746 747 748 749
	/*
	 * This function should never be reached for non-IN classes.
	 */
	keystruct.common.rdclass = dns_rdataclass_in;
750
	keystruct.common.rdtype = dns_rdatatype_dnskey;
Evan Hunt's avatar
Evan Hunt committed
751

752
	/*
753
	 * The key data in keystruct is not dynamically allocated.
754 755 756 757 758
	 */
	keystruct.mctx = NULL;

	ISC_LINK_INIT(&keystruct.common, link);

759
	if (flags > 0xffff)
760
		CHECKM(ISC_R_RANGE, "key flags");
761 762
	if (flags & DNS_KEYFLAG_REVOKE)
		CHECKM(DST_R_BADKEYTYPE, "key flags revoke bit set");
763
	if (proto > 0xff)
764
		CHECKM(ISC_R_RANGE, "key protocol");
765
	if (alg > 0xff)
766
		CHECKM(ISC_R_RANGE, "key algorithm");
767 768 769
	keystruct.flags = (uint16_t)flags;
	keystruct.protocol = (uint8_t)proto;
	keystruct.algorithm = (uint8_t)alg;
770 771 772 773

	isc_buffer_init(&keydatabuf, keydata, sizeof(keydata));
	isc_buffer_init(&rrdatabuf, rrdata, sizeof(rrdata));

774
	keystr = cfg_obj_asstring(cfg_tuple_get(key, "key"));
775
	CHECK(isc_base64_decodestring(keystr, &keydatabuf));
776 777 778 779
	isc_buffer_usedregion(&keydatabuf, &r);
	keystruct.datalen = r.length;
	keystruct.data = r.base;

Ondřej Surý's avatar
Ondřej Surý committed
780
	if ((keystruct.algorithm == DST_ALG_RSASHA1) &&
781
	    r.length > 1 && r.base[0] == 1 && r.base[1] == 3)
Evan Hunt's avatar
Evan Hunt committed
782
	{
783
		cfg_obj_log(key, named_g_lctx, ISC_LOG_WARNING,
Evan Hunt's avatar
Evan Hunt committed
784 785
			    "%s '%s' has a weak exponent",
			    *initialp ? "initial-key" : "static-key",
786
			    keynamestr);
Evan Hunt's avatar
Evan Hunt committed
787
	}
788

789 790 791 792 793
	CHECK(dns_rdata_fromstruct(NULL,
				   keystruct.common.rdclass,
				   keystruct.common.rdtype,
				   &keystruct, &rrdatabuf));
	dns_fixedname_init(&fkeyname);
794
	isc_buffer_constinit(&namebuf, keynamestr, strlen(keynamestr));
795
	isc_buffer_add(&namebuf, strlen(keynamestr));
796
	CHECK(dns_name_fromtext(keyname, &namebuf, dns_rootname, 0, NULL));
Evan Hunt's avatar
Evan Hunt committed
797
	CHECK(dst_key_fromdns(keyname, dns_rdataclass_in, &rrdatabuf,
798 799
			      mctx, &dstkey));

800
	*target = dstkey;
801 802 803
	return (ISC_R_SUCCESS);

 cleanup:
804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822
	if (dstkey != NULL) {
		dst_key_free(&dstkey);
	}

	return (result);
}

/*%
 * Parse 'key' in the context of view configuration 'vconfig'.  If successful,
 * add the key to 'secroots' if both of the following conditions are true:
 *
 *   - 'keyname_match' is NULL or it matches the owner name of 'key',
 *   - support for the algorithm used by 'key' is not disabled by 'resolver'
 *     for the owner name of 'key'.
 *
 * 'managed' is true for managed keys and false for trusted keys.  'mctx' is
 * the memory context to use for allocating memory.
 */
static isc_result_t
Evan Hunt's avatar
Evan Hunt committed
823 824 825
process_key(const cfg_obj_t *key, dns_keytable_t *secroots,
	    const dns_name_t *keyname_match, dns_resolver_t *resolver,
	    bool managed, isc_mem_t *mctx)
826 827 828 829 830 831
{
	const dns_name_t *keyname = NULL;
	const char *keynamestr = NULL;
	dst_key_t *dstkey = NULL;
	unsigned int keyalg;
	isc_result_t result;
Evan Hunt's avatar
Evan Hunt committed
832
	bool initializing = managed;
833

Evan Hunt's avatar
Evan Hunt committed
834 835
	result = dstkey_fromconfig(key, &initializing,
				   &dstkey, &keynamestr, mctx);
836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853

	switch (result) {
	case ISC_R_SUCCESS:
		/*
		 * Key was parsed correctly, its algorithm is supported by the
		 * crypto library, and it is not revoked.
		 */
		keyname = dst_key_name(dstkey);
		keyalg = dst_key_alg(dstkey);
		break;
	case DST_R_UNSUPPORTEDALG:
	case DST_R_BADKEYTYPE:
		/*
		 * Key was parsed correctly, but it cannot be used; this is not
		 * a fatal error - log a warning about this key being ignored,
		 * but do not prevent any further ones from being processed.
		 */
		cfg_obj_log(key, named_g_lctx, ISC_LOG_WARNING,
Evan Hunt's avatar
Evan Hunt committed
854 855
			    "ignoring %s for '%s': %s",
			    initializing ? "initial-key" : "static-key",
856 857 858 859 860 861
			    keynamestr, isc_result_totext(result));
		return (ISC_R_SUCCESS);
	case DST_R_NOCRYPTO:
		/*
		 * Crypto support is not available.
		 */
862
		cfg_obj_log(key, named_g_lctx, ISC_LOG_ERROR,
Evan Hunt's avatar
Evan Hunt committed
863 864
			    "ignoring %s for '%s': no crypto support",
			    initializing ? "initial-key" : "static-key",
865
			    keynamestr);
866 867 868 869 870 871 872
		return (result);
	default:
		/*
		 * Something unexpected happened; we have no choice but to
		 * indicate an error so that the configuration loading process
		 * is interrupted.
		 */
873
		cfg_obj_log(key, named_g_lctx, ISC_LOG_ERROR,
Evan Hunt's avatar
Evan Hunt committed
874 875
			    "configuring %s for '%s': %s",
			    initializing ? "initial-key" : "static-key",
876
			    keynamestr, isc_result_totext(result));
877
		return (ISC_R_FAILURE);
878
	}
879

880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895
	/*
	 * If the caller requested to only load keys for a specific name and
	 * the owner name of this key does not match the requested name, do not
	 * load it.
	 */
	if (keyname_match != NULL && !dns_name_equal(keyname_match, keyname)) {
		goto done;
	}

	/*
	 * Ensure that 'resolver' allows using the algorithm of this key for
	 * its owner name.  If it does not, do not load the key and log a
	 * warning, but do not prevent further keys from being processed.
	 */
	if (!dns_resolver_algorithm_supported(resolver, keyname, keyalg)) {
		cfg_obj_log(key, named_g_lctx, ISC_LOG_WARNING,
Evan Hunt's avatar
Evan Hunt committed
896 897 898
			    "ignoring %s for '%s': algorithm is disabled",
			    initializing ? "initial-key" : "static-key",
			    keynamestr);
899 900 901 902
		goto done;
	}

	/*
Evan Hunt's avatar
Evan Hunt committed
903
	 * Add the key to 'secroots'.  Keys from a "dnssec-keys" or
904
	 * "managed-keys" statement may be either static or initializing
Evan Hunt's avatar
Evan Hunt committed
905 906 907
	 * keys. If it's not initializing, we don't want to treat it as
	 * managed, so we use 'initializing' twice here, for both the
	 * 'managed' and 'initializing' arguments to dns_keytable_add().
908
	 */
Evan Hunt's avatar
Evan Hunt committed
909 910
	result = dns_keytable_add(secroots, initializing,
				  initializing, &dstkey);
911 912 913 914 915 916 917 918

 done:
	/*
	 * Ensure 'dstkey' does not leak.  Note that if dns_keytable_add()
	 * succeeds, ownership of the key structure is transferred to the key
	 * table, i.e. 'dstkey' is set to NULL.
	 */
	if (dstkey != NULL) {
919
		dst_key_free(&dstkey);
920
	}
921 922 923 924

	return (result);
}

Evan Hunt's avatar
Evan Hunt committed
925 926 927 928 929
/*
 * Load keys from configuration into key table. If 'keyname' is specified,
 * only load keys matching that name. If 'managed' is true, load the key as
 * an initializing key.
 */
930
static isc_result_t
Evan Hunt's avatar
Evan Hunt committed
931
load_view_keys(const cfg_obj_t *keys, dns_view_t *view, bool managed,
932
	       const dns_name_t *keyname, isc_mem_t *mctx)
933 934
{
	const cfg_listelt_t *elt, *elt2;
935
	const cfg_obj_t *keylist;
936 937 938 939
	isc_result_t result;
	dns_keytable_t *secroots = NULL;

	CHECK(dns_view_getsecroots(view, &secroots));
940 941 942

	for (elt = cfg_list_first(keys);
	     elt != NULL;
Evan Hunt's avatar
Evan Hunt committed
943 944
	     elt = cfg_list_next(elt))
	{
945 946 947 948
		keylist = cfg_listelt_value(elt);

		for (elt2 = cfg_list_first(keylist);
		     elt2 != NULL;
Evan Hunt's avatar
Evan Hunt committed
949 950
		     elt2 = cfg_list_next(elt2))
		{
Evan Hunt's avatar
Evan Hunt committed
951
			CHECK(process_key(cfg_listelt_value(elt2),
952 953
					  secroots, keyname, view->resolver,
					  managed, mctx));
954 955 956 957
		}
	}

 cleanup:
Evan Hunt's avatar
Evan Hunt committed
958
	if (secroots != NULL) {
959
		dns_keytable_detach(&secroots);
Evan Hunt's avatar
Evan Hunt committed
960 961
	}
	if (result == DST_R_NOCRYPTO) {
962
		result = ISC_R_SUCCESS;
Evan Hunt's avatar
Evan Hunt committed
963
	}
964
	return (result);
965 966
}

967 968 969
/*%
 * Check whether a key has been successfully loaded.
 */
970
static bool
971 972 973 974 975 976 977
keyloaded(dns_view_t *view, const dns_name_t *name) {
	isc_result_t result;
	dns_keytable_t *secroots = NULL;
	dns_keynode_t *keynode = NULL;

	result = dns_view_getsecroots(view, &secroots);
	if (result != ISC_R_SUCCESS)
978
		return (false);