server.c 410 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/kaspconf.h>
54
#include <isccfg/namedconf.h>
55 56

#include <bind9/check.h>
57

58
#include <dns/adb.h>
Evan Hunt's avatar
Evan Hunt committed
59
#include <dns/badcache.h>
60
#include <dns/cache.h>
61
#include <dns/catz.h>
62
#include <dns/db.h>
Bob Halley's avatar
Bob Halley committed
63
#include <dns/dispatch.h>
64
#include <dns/dlz.h>
65
#include <dns/dnsrps.h>
66
#include <dns/dns64.h>
Evan Hunt's avatar
Evan Hunt committed
67
#include <dns/dyndb.h>
68
#include <dns/events.h>
69
#include <dns/forward.h>
70
#include <dns/fixedname.h>
71
#include <dns/geoip.h>
72
#include <dns/journal.h>
73
#include <dns/kasp.h>
74
#include <dns/keytable.h>
75
#include <dns/keyvalues.h>
76
#include <dns/lib.h>
77
#include <dns/master.h>
78
#include <dns/masterdump.h>
Evan Hunt's avatar
Evan Hunt committed
79
#include <dns/nta.h>
80
#include <dns/order.h>
81
#include <dns/peer.h>
82
#include <dns/portlist.h>
83
#include <dns/private.h>
84
#include <dns/rbt.h>
85
#include <dns/rdataclass.h>
86
#include <dns/rdatalist.h>
87
#include <dns/rdataset.h>
88
#include <dns/rdatastruct.h>
89
#include <dns/resolver.h>
90
#include <dns/rootns.h>
Evan Hunt's avatar
Evan Hunt committed
91
#include <dns/rriterator.h>
92
#include <dns/secalg.h>
93
#include <dns/soa.h>
94
#include <dns/stats.h>
95
#include <dns/tkey.h>
96
#include <dns/tsig.h>
Evan Hunt's avatar
Evan Hunt committed
97
#include <dns/ttl.h>
98
#include <dns/view.h>
99
#include <dns/zone.h>
100
#include <dns/zt.h>
101

102
#include <dst/dst.h>
103
#include <dst/result.h>
104

105
#include <ns/client.h>
106
#include <ns/hooks.h>
107 108 109
#include <ns/listenlist.h>
#include <ns/interfacemgr.h>

110
#include <named/config.h>
111
#include <named/control.h>
112
#if defined(HAVE_GEOIP2)
Evan Hunt's avatar
Evan Hunt committed
113
#include <named/geoip.h>
114
#endif /* HAVE_GEOIP2 */
115
#include <named/log.h>
116
#include <named/logconf.h>
117
#include <named/main.h>
118
#include <named/os.h>
Bob Halley's avatar
Bob Halley committed
119
#include <named/server.h>
120
#include <named/statschannel.h>
121 122 123
#include <named/tkeyconf.h>
#include <named/tsigconf.h>
#include <named/zoneconf.h>
124
#ifdef HAVE_LIBSCF
125
#include <named/smf_globals.h>
126 127
#include <stdlib.h>
#endif
128 129 130 131 132 133 134 135 136 137 138

#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 */
139

140 141 142 143
#ifndef SIZE_MAX
#define SIZE_MAX ((size_t)-1)
#endif

144 145 146 147
#ifndef SIZE_AS_PERCENT
#define SIZE_AS_PERCENT ((size_t)-2)
#endif

148 149 150 151 152 153 154 155 156 157
#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 */

158 159
#define MAX_TCP_TIMEOUT 65535

160
/*%
161 162 163 164
 * Check an operation for failure.  Assumes that the function
 * using it has a 'result' variable and a 'cleanup' label.
 */
#define CHECK(op) \
165 166
	do { result = (op);					  \
	       if (result != ISC_R_SUCCESS) goto cleanup;	  \
167 168
	} while (0)

169
#define TCHECK(op) \
170 171 172 173 174
	do { tresult = (op);					  \
		if (tresult != ISC_R_SUCCESS) {			  \
			isc_buffer_clear(*text);		  \
			goto cleanup;	 			  \
		}						  \
175 176
	} while (0)

177
#define CHECKM(op, msg) \
178
	do { result = (op);					  \
179
	       if (result != ISC_R_SUCCESS) {			  \
180
			isc_log_write(named_g_lctx,		  \
181
				      NAMED_LOGCATEGORY_GENERAL,  \
182
				      NAMED_LOGMODULE_SERVER,	  \
183 184 185 186 187 188 189
				      ISC_LOG_ERROR,		  \
				      "%s: %s", msg,		  \
				      isc_result_totext(result)); \
			goto cleanup;				  \
		}						  \
	} while (0)						  \

Mark Andrews's avatar
Mark Andrews committed
190
#define CHECKMF(op, msg, file) \
191
	do { result = (op);					  \
Mark Andrews's avatar
Mark Andrews committed
192
	       if (result != ISC_R_SUCCESS) {			  \
193
			isc_log_write(named_g_lctx,		  \
194
				      NAMED_LOGCATEGORY_GENERAL,  \
195
				      NAMED_LOGMODULE_SERVER,	  \
Mark Andrews's avatar
Mark Andrews committed
196 197 198 199 200 201 202
				      ISC_LOG_ERROR,		  \
				      "%s '%s': %s", msg, file,	  \
				      isc_result_totext(result)); \
			goto cleanup;				  \
		}						  \
	} while (0)						  \

203
#define CHECKFATAL(op, msg) \
204
	do { result = (op);					  \
205 206
		if (result != ISC_R_SUCCESS)			  \
			fatal(server, msg, result);		  \
207 208
	} while (0)						  \

209 210 211 212 213 214
/*%
 * 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
215
#define MAX_ADB_SIZE_FOR_CACHESHARE	8388608U
216

217
struct named_dispatch {
218 219 220
	isc_sockaddr_t			addr;
	unsigned int			dispatchgen;
	dns_dispatch_t			*dispatch;
221
	ISC_LINK(struct named_dispatch)	link;
222 223
};

224
struct named_cache {
225 226
	dns_cache_t			*cache;
	dns_view_t			*primaryview;
227 228
	bool			needflush;
	bool			adbsizeadjusted;
229
	dns_rdataclass_t		rdclass;
230
	ISC_LINK(named_cache_t)		link;
231 232
};

233 234
struct dumpcontext {
	isc_mem_t			*mctx;
235 236 237 238 239
	bool			dumpcache;
	bool			dumpzones;
	bool			dumpadb;
	bool			dumpbad;
	bool			dumpfail;
240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261
	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;
};

262 263
/*%
 * Configuration context to retain for each view that allows
264
 * new zones to be added at runtime.
265
 */
Evan Hunt's avatar
Evan Hunt committed
266
typedef struct ns_cfgctx {
267
	isc_mem_t *			mctx;
268 269
	cfg_parser_t *			conf_parser;
	cfg_parser_t *			add_parser;
270
	cfg_obj_t *			config;
271
	cfg_obj_t *			vconfig;
272
	cfg_obj_t *			nzf_config;
273
	cfg_aclconfctx_t *		actx;
Evan Hunt's avatar
Evan Hunt committed
274
} ns_cfgctx_t;
275

276 277 278 279 280 281
/*%
 * 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);

282 283 284 285 286 287
/*%
 * 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 {
288
		named_server_t *server;
289
		bool reconfig;
290 291 292
		isc_refcount_t refs;
} ns_zoneload_t;

293
typedef struct {
294
	named_server_t *server;
295 296 297 298 299 300 301 302
} 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;
303
	bool mod;
304 305
} catz_chgzone_event_t;

Mark Andrews's avatar
Mark Andrews committed
306 307 308 309 310 311 312
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;

313 314 315
/*
 * These zones should not leak onto the Internet.
 */
316
const char *empty_zones[] = {
317
	/* RFC 1918 */
318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335
	"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",
336

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
	/* 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",

403
	/* RFC 5735 and RFC 5737 */
404 405 406 407 408 409 410
	"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 */
411 412

	/* Local IPv6 Unicast Addresses */
413 414
	"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
415
	/* LOCALLY ASSIGNED LOCAL ADDRESS SCOPE */
416 417 418 419 420
	"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 */
421

422
	/* Example Prefix, RFC 3849. */
423
	"8.B.D.0.1.0.0.2.IP6.ARPA",
424

425 426 427
	/* RFC 7534 */
	"EMPTY.AS112.ARPA",

428 429 430
	/* RFC 8375 */
	"HOME.ARPA",

431
	NULL
432 433
};

Francis Dupont's avatar
Francis Dupont committed
434
ISC_PLATFORM_NORETURN_PRE static void
435 436
fatal(named_server_t *server,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,
462 463
	       dns_viewlist_t *viewlist, dns_kasplist_t* kasplist,
	       cfg_aclconfctx_t *aclconf, bool added, bool old_rpz_ok,
464
	       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
703 704
ta_fromconfig(const cfg_obj_t *key, bool *initialp, dst_key_t **keyp,
	      dns_rdata_ds_t **dsp, const char **namestrp, isc_mem_t *mctx)
705
{
706
	dns_rdata_dnskey_t keystruct;
707
	dns_rdata_ds_t *ds = NULL;
708
	uint32_t rdata1, rdata2, rdata3;
709
	const char *datastr = NULL, *namestr = NULL;
710 711
	unsigned char data[4096];
	isc_buffer_t databuf;
712 713 714
	unsigned char rrdata[4096];
	isc_buffer_t rrdatabuf;
	isc_region_t r;
715 716
	dns_fixedname_t fname;
	dns_name_t *name = NULL;
717 718 719
	isc_buffer_t namebuf;
	isc_result_t result;
	dst_key_t *dstkey = NULL;
720 721 722 723 724 725 726 727
	const char *atstr = NULL;
	enum {
		INIT_DNSKEY,
		STATIC_DNSKEY,
		INIT_DS,
		STATIC_DS,
		TRUSTED
	} anchortype;
728

729 730 731
	REQUIRE(keyp != NULL && *keyp == NULL);
	REQUIRE(dsp != NULL && *dsp == NULL);
	REQUIRE(namestrp != NULL && *namestrp == NULL);
732 733

	/* if DNSKEY, flags; if DS, key tag */
734
	rdata1 = cfg_obj_asuint32(cfg_tuple_get(key, "rdata1"));
735 736

	/* if DNSKEY, protocol; if DS, algorithm */
737
	rdata2 = cfg_obj_asuint32(cfg_tuple_get(key, "rdata2"));
738 739

	/* if DNSKEY, algorithm; if DS, digest type */
740
	rdata3 = cfg_obj_asuint32(cfg_tuple_get(key, "rdata3"));
741

742 743
	namestr = cfg_obj_asstring(cfg_tuple_get(key, "name"));
	*namestrp = namestr;
744

745 746 747 748
	name = dns_fixedname_initname(&fname);
	isc_buffer_constinit(&namebuf, namestr, strlen(namestr));
	isc_buffer_add(&namebuf, strlen(namestr));
	CHECK(dns_name_fromtext(name, &namebuf, dns_rootname, 0, NULL));
749

Evan Hunt's avatar
Evan Hunt committed
750
	if (*initialp) {
751
		atstr = cfg_obj_asstring(cfg_tuple_get(key, "anchortype"));
Automatic Updater's avatar
Automatic Updater committed
752

753 754 755 756
		if (strcasecmp(atstr, "static-key") == 0) {
			*initialp = false;
			anchortype = STATIC_DNSKEY;
		} else if (strcasecmp(atstr, "static-ds") == 0) {
Evan Hunt's avatar
Evan Hunt committed
757
			*initialp = false;
758 759 760 761 762 763
			anchortype = STATIC_DS;
		} else if (strcasecmp(atstr, "initial-key") == 0) {
			anchortype = INIT_DNSKEY;
		} else if (strcasecmp(atstr, "initial-ds") == 0) {
			anchortype = INIT_DS;
		} else {
764
			cfg_obj_log(key, named_g_lctx, ISC_LOG_ERROR,
Evan Hunt's avatar
Evan Hunt committed
765
				    "key '%s': "
Automatic Updater's avatar
Automatic Updater committed
766
				    "invalid initialization method '%s'",
767
				    namestr, atstr);
Automatic Updater's avatar
Automatic Updater committed
768 769 770
			result = ISC_R_FAILURE;
			goto cleanup;
		}
771 772
	} else {
		anchortype = TRUSTED;
Automatic Updater's avatar
Automatic Updater committed
773
	}
774

775 776 777
	isc_buffer_init(&databuf, data, sizeof(data));
	isc_buffer_init(&rrdatabuf, rrdata, sizeof(rrdata));

778 779 780 781 782 783 784 785 786 787
	switch(anchortype) {
	case INIT_DNSKEY:
	case STATIC_DNSKEY:
	case TRUSTED:
		/*
		 * This function should never be reached for view
		 * class other than IN
		 */
		keystruct.common.rdclass = dns_rdataclass_in;
		keystruct.common.rdtype = dns_rdatatype_dnskey;
Evan Hunt's avatar
Evan Hunt committed
788

789 790 791 792
		/*
		 * The key data in keystruct is not dynamically allocated.
		 */
		keystruct.mctx = NULL;
793

794 795
		ISC_LINK_INIT(&keystruct.common, link);

796
		if (rdata1 > 0xffff) {
797 798
			CHECKM(ISC_R_RANGE, "key flags");
		}
799
		if (rdata1 & DNS_KEYFLAG_REVOKE) {
800 801
			CHECKM(DST_R_BADKEYTYPE, "key flags revoke bit set");
		}
802
		if (rdata2 > 0xff) {
803 804
			CHECKM(ISC_R_RANGE, "key protocol");
		}
805
		if (rdata3> 0xff) {
806 807 808
			CHECKM(ISC_R_RANGE, "key algorithm");
		}

809 810 811
		keystruct.flags = (uint16_t)rdata1;
		keystruct.protocol = (uint8_t)rdata2;
		keystruct.algorithm = (uint8_t)rdata3;
812 813 814 815 816 817 818 819 820 821

		datastr = cfg_obj_asstring(cfg_tuple_get(key, "data"));
		CHECK(isc_base64_decodestring(datastr, &databuf));
		isc_buffer_usedregion(&databuf, &r);
		keystruct.datalen = r.length;
		keystruct.data = r.base;

		CHECK(dns_rdata_fromstruct(NULL, keystruct.common.rdclass,
					   keystruct.common.rdtype,
					   &keystruct, &rrdatabuf));
822
		CHECK(dst_key_fromdns(name, dns_rdataclass_in,
823 824
				      &rrdatabuf, mctx, &dstkey));

825
		*keyp = dstkey;
826 827 828 829
		break;

	case INIT_DS:
	case STATIC_DS:
830 831 832 833 834 835 836
		ds = isc_mem_get(mctx, sizeof(*ds));
		ds->common.rdclass = dns_rdataclass_in;
		ds->common.rdtype = dns_rdatatype_ds;
		ds->mctx = NULL;

		ISC_LINK_INIT(&ds->common, link);

837
		if (rdata1 > 0xffff) {
838 839
			CHECKM(ISC_R_RANGE, "key tag");
		}
840
		if (rdata2 > 0xff) {
841 842
			CHECKM(ISC_R_RANGE, "key algorithm");
		}
843
		if (rdata3 > 0xff) {
844 845 846
			CHECKM(ISC_R_RANGE, "digest type");
		}

847 848 849
		ds->key_tag = (uint16_t)rdata1;
		ds->algorithm = (uint8_t)rdata2;
		ds->digest_type = (uint8_t)rdata3;
850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870

		datastr = cfg_obj_asstring(cfg_tuple_get(key, "data"));
		CHECK(isc_hex_decodestring(datastr, &databuf));
		isc_buffer_usedregion(&databuf, &r);

		switch (ds->digest_type) {
		case DNS_DSDIGEST_SHA1:
			if (r.length != ISC_SHA1_DIGESTLENGTH) {
				CHECK(ISC_R_UNEXPECTEDEND);
			}
			break;
		case DNS_DSDIGEST_SHA256:
			if (r.length != ISC_SHA256_DIGESTLENGTH) {
				CHECK(ISC_R_UNEXPECTEDEND);
			}
			break;
		case DNS_DSDIGEST_SHA384:
			if (r.length != ISC_SHA384_DIGESTLENGTH) {
				CHECK(ISC_R_UNEXPECTEDEND);
			}
			break;
871 872 873 874 875 876 877 878
		default:
			cfg_obj_log(key, named_g_lctx, ISC_LOG_ERROR,
				    "key '%s': "
				    "unknown ds digest type %u",
				    namestr, ds->digest_type);
			result = ISC_R_FAILURE;
			goto cleanup;
			break;
879 880 881 882 883 884 885 886 887 888
		}

		ds->mctx = mctx;
		ds->length = r.length;
		ds->digest = isc_mem_allocate(mctx, r.length);
		memmove(ds->digest, r.base, r.length);

		*dsp = ds;
		ds = NULL;
		break;
889 890 891 892 893

	default:
		INSIST(0);
		ISC_UNREACHABLE();
	}
894 895 896 897

	return (ISC_R_SUCCESS);

 cleanup:
898 899 900 901
	if (dstkey != NULL) {
		dst_key_free(&dstkey);
	}

902 903 904 905 906
	if (ds != NULL) {
		dns_rdata_freestruct(ds);
		isc_mem_put(mctx, ds, sizeof(*ds));
	}

907 908 909 910 911 912 913 914 915 916 917 918 919 920 921
	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
922 923 924
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)
925
{
926 927 928
	dns_fixedname_t fkeyname;
	dns_name_t *keyname = NULL;
	const char *namestr = NULL;
929
	dst_key_t *dstkey = NULL;
930
	dns_rdata_ds_t *ds = NULL;
931 932
	unsigned int keyalg;
	isc_result_t result;
Evan Hunt's avatar
Evan Hunt committed
933
	bool initializing = managed;
934

935 936
	result = ta_fromconfig(key, &initializing, &dstkey, &ds,
			       &namestr, mctx);
937 938 939 940

	switch (result) {
	case ISC_R_SUCCESS:
		/*
941 942 943 944 945
		 * Trust anchor was parsed correctly. If dstkey is
		 * not NULL, then it was a key anchor, its algorithm
		 * is supported by the crypto library, and it is not
		 * revoked. If dstkey is NULL, then it was a DS
		 * trust anchor instead.
946
		 */
947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964
		if (dstkey != NULL) {
			keyname = dst_key_name(dstkey);
			keyalg = dst_key_alg(dstkey);
		} else {
			isc_buffer_t b;

			INSIST(ds != NULL);

			isc_buffer_constinit(&b, namestr, strlen(namestr));
			isc_buffer_add(&b, strlen(namestr));
			keyname = dns_fixedname_initname(&fkeyname);
			result = dns_name_fromtext(keyname, &b,
						   dns_rootname, 0, NULL);
			if (result != ISC_R_SUCCESS) {
				return (result);
			}
			keyalg = ds->algorithm;
		}
965 966 967 968 969 970 971 972 973
		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
974 975
			    "ignoring %s for '%s': %s",
			    initializing ? "initial-key" : "static-key",
976
			    namestr, isc_result_totext(result));
977 978 979 980 981
		return (ISC_R_SUCCESS);
	case DST_R_NOCRYPTO:
		/*
		 * Crypto support is not available.
		 */
982
		cfg_obj_log(key, named_g_lctx, ISC_LOG_ERROR,
Evan Hunt's avatar
Evan Hunt committed
983 984
			    "ignoring %s for '%s': no crypto support",
			    initializing ? "initial-key" : "static-key",
985
			    namestr);
986 987 988 989 990 991 992
		return (result);
	default:
		/*
		 * Something unexpected happened; we have no choice but to
		 * indicate an error so that the configuration loading process
		 * is interrupted.
		 */
993
		cfg_obj_log(key, named_g_lctx, ISC_LOG_ERROR,
Evan Hunt's avatar
Evan Hunt committed
994 995
			    "configuring %s for '%s': %s",
			    initializing ? "initial-key" : "static-key",
996
			    namestr, isc_result_totext(result));
997
		return (ISC_R_FAILURE);
998
	}
999