parse.y revision 1.147
1/* $OpenBSD: parse.y,v 1.147 2010/05/10 02:00:50 krw Exp $ */ 2 3/* 4 * Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org> 5 * Copyright (c) 2001 Markus Friedl. All rights reserved. 6 * Copyright (c) 2001 Daniel Hartmeier. All rights reserved. 7 * Copyright (c) 2001 Theo de Raadt. All rights reserved. 8 * Copyright (c) 2004, 2005 Hans-Joerg Hoexer <hshoexer@openbsd.org> 9 * 10 * Permission to use, copy, modify, and distribute this software for any 11 * purpose with or without fee is hereby granted, provided that the above 12 * copyright notice and this permission notice appear in all copies. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 15 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 16 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 17 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 18 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 19 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 20 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 21 */ 22 23%{ 24#include <sys/types.h> 25#include <sys/ioctl.h> 26#include <sys/queue.h> 27#include <sys/socket.h> 28#include <sys/stat.h> 29#include <net/if.h> 30#include <netinet/in.h> 31#include <netinet/ip_ipsp.h> 32#include <arpa/inet.h> 33 34#include <ctype.h> 35#include <err.h> 36#include <errno.h> 37#include <fcntl.h> 38#include <ifaddrs.h> 39#include <limits.h> 40#include <netdb.h> 41#include <stdarg.h> 42#include <stdio.h> 43#include <string.h> 44#include <syslog.h> 45#include <unistd.h> 46#include <netdb.h> 47 48#include "ipsecctl.h" 49 50TAILQ_HEAD(files, file) files = TAILQ_HEAD_INITIALIZER(files); 51static struct file { 52 TAILQ_ENTRY(file) entry; 53 FILE *stream; 54 char *name; 55 int lineno; 56 int errors; 57} *file; 58struct file *pushfile(const char *, int); 59int popfile(void); 60int check_file_secrecy(int, const char *); 61int yyparse(void); 62int yylex(void); 63int yyerror(const char *, ...); 64int yywarn(const char *, ...); 65int kw_cmp(const void *, const void *); 66int lookup(char *); 67int lgetc(int); 68int lungetc(int); 69int findeol(void); 70 71TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead); 72struct sym { 73 TAILQ_ENTRY(sym) entry; 74 int used; 75 int persist; 76 char *nam; 77 char *val; 78}; 79int symset(const char *, const char *, int); 80char *symget(const char *); 81int cmdline_symset(char *); 82 83#define KEYSIZE_LIMIT 1024 84 85static struct ipsecctl *ipsec = NULL; 86static int debug = 0; 87 88const struct ipsec_xf authxfs[] = { 89 { "unknown", AUTHXF_UNKNOWN, 0, 0 }, 90 { "none", AUTHXF_NONE, 0, 0 }, 91 { "hmac-md5", AUTHXF_HMAC_MD5, 16, 0 }, 92 { "hmac-ripemd160", AUTHXF_HMAC_RIPEMD160, 20, 0 }, 93 { "hmac-sha1", AUTHXF_HMAC_SHA1, 20, 0 }, 94 { "hmac-sha2-256", AUTHXF_HMAC_SHA2_256, 32, 0 }, 95 { "hmac-sha2-384", AUTHXF_HMAC_SHA2_384, 48, 0 }, 96 { "hmac-sha2-512", AUTHXF_HMAC_SHA2_512, 64, 0 }, 97 { NULL, 0, 0, 0 }, 98}; 99 100const struct ipsec_xf encxfs[] = { 101 { "unknown", ENCXF_UNKNOWN, 0, 0 }, 102 { "none", ENCXF_NONE, 0, 0 }, 103 { "3des-cbc", ENCXF_3DES_CBC, 24, 24 }, 104 { "des-cbc", ENCXF_DES_CBC, 8, 8 }, 105 { "aes", ENCXF_AES, 16, 32 }, 106 { "aes-128", ENCXF_AES_128, 16, 16 }, 107 { "aes-192", ENCXF_AES_192, 24, 24 }, 108 { "aes-256", ENCXF_AES_256, 32, 32 }, 109 { "aesctr", ENCXF_AESCTR, 16+4, 32+4 }, 110 { "blowfish", ENCXF_BLOWFISH, 5, 56 }, 111 { "cast128", ENCXF_CAST128, 5, 16 }, 112 { "null", ENCXF_NULL, 0, 0 }, 113 { "skipjack", ENCXF_SKIPJACK, 10, 10 }, 114 { NULL, 0, 0, 0 }, 115}; 116 117const struct ipsec_xf compxfs[] = { 118 { "unknown", COMPXF_UNKNOWN, 0, 0 }, 119 { "deflate", COMPXF_DEFLATE, 0, 0 }, 120 { "lzs", COMPXF_LZS, 0, 0 }, 121 { NULL, 0, 0, 0 }, 122}; 123 124const struct ipsec_xf groupxfs[] = { 125 { "unknown", GROUPXF_UNKNOWN, 0, 0 }, 126 { "none", GROUPXF_NONE, 0, 0 }, 127 { "modp768", GROUPXF_768, 768, 0 }, 128 { "grp1", GROUPXF_768, 768, 0 }, 129 { "modp1024", GROUPXF_1024, 1024, 0 }, 130 { "grp2", GROUPXF_1024, 1024, 0 }, 131 { "modp1536", GROUPXF_1536, 1536, 0 }, 132 { "grp5", GROUPXF_1536, 1536, 0 }, 133 { "modp2048", GROUPXF_2048, 2048, 0 }, 134 { "grp14", GROUPXF_2048, 2048, 0 }, 135 { "modp3072", GROUPXF_3072, 3072, 0 }, 136 { "grp15", GROUPXF_3072, 3072, 0 }, 137 { "modp4096", GROUPXF_4096, 4096, 0 }, 138 { "grp16", GROUPXF_4096, 4096, 0 }, 139 { "modp6144", GROUPXF_6144, 6144, 0 }, 140 { "grp17", GROUPXF_6144, 6144, 0 }, 141 { "modp8192", GROUPXF_8192, 8192, 0 }, 142 { "grp18", GROUPXF_8192, 8192, 0 }, 143 { NULL, 0, 0, 0 }, 144}; 145 146int atoul(char *, u_long *); 147int atospi(char *, u_int32_t *); 148u_int8_t x2i(unsigned char *); 149struct ipsec_key *parsekey(unsigned char *, size_t); 150struct ipsec_key *parsekeyfile(char *); 151struct ipsec_addr_wrap *host(const char *); 152struct ipsec_addr_wrap *host_v6(const char *, int); 153struct ipsec_addr_wrap *host_v4(const char *, int); 154struct ipsec_addr_wrap *host_dns(const char *, int); 155struct ipsec_addr_wrap *host_if(const char *, int); 156struct ipsec_addr_wrap *host_any(void); 157void ifa_load(void); 158int ifa_exists(const char *); 159struct ipsec_addr_wrap *ifa_lookup(const char *ifa_name); 160struct ipsec_addr_wrap *ifa_grouplookup(const char *); 161void set_ipmask(struct ipsec_addr_wrap *, u_int8_t); 162const struct ipsec_xf *parse_xf(const char *, const struct ipsec_xf *); 163struct ipsec_life *parse_life(int); 164struct ipsec_transforms *copytransforms(const struct ipsec_transforms *); 165struct ipsec_life *copylife(const struct ipsec_life *); 166struct ipsec_auth *copyipsecauth(const struct ipsec_auth *); 167struct ike_auth *copyikeauth(const struct ike_auth *); 168struct ipsec_key *copykey(struct ipsec_key *); 169struct ipsec_addr_wrap *copyhost(const struct ipsec_addr_wrap *); 170char *copytag(const char *); 171struct ipsec_rule *copyrule(struct ipsec_rule *); 172int validate_af(struct ipsec_addr_wrap *, 173 struct ipsec_addr_wrap *); 174int validate_sa(u_int32_t, u_int8_t, 175 struct ipsec_transforms *, struct ipsec_key *, 176 struct ipsec_key *, u_int8_t); 177struct ipsec_rule *create_sa(u_int8_t, u_int8_t, struct ipsec_hosts *, 178 u_int32_t, struct ipsec_transforms *, 179 struct ipsec_key *, struct ipsec_key *); 180struct ipsec_rule *reverse_sa(struct ipsec_rule *, u_int32_t, 181 struct ipsec_key *, struct ipsec_key *); 182struct ipsec_rule *create_sagroup(struct ipsec_addr_wrap *, u_int8_t, 183 u_int32_t, struct ipsec_addr_wrap *, u_int8_t, 184 u_int32_t); 185struct ipsec_rule *create_flow(u_int8_t, u_int8_t, struct ipsec_hosts *, 186 u_int8_t, char *, char *, u_int8_t); 187int set_rule_peers(struct ipsec_rule *r, 188 struct ipsec_hosts *peers); 189void expand_any(struct ipsec_addr_wrap *); 190int expand_rule(struct ipsec_rule *, struct ipsec_hosts *, 191 u_int8_t, u_int32_t, struct ipsec_key *, 192 struct ipsec_key *, int); 193struct ipsec_rule *reverse_rule(struct ipsec_rule *); 194struct ipsec_rule *create_ike(u_int8_t, struct ipsec_hosts *, 195 struct ike_mode *, struct ike_mode *, u_int8_t, 196 u_int8_t, u_int8_t, char *, char *, 197 struct ike_auth *, char *); 198int add_sagroup(struct ipsec_rule *); 199int get_id_type(char *); 200 201struct ipsec_transforms *ipsec_transforms; 202 203typedef struct { 204 union { 205 int64_t number; 206 u_int8_t ikemode; 207 u_int8_t dir; 208 u_int8_t satype; /* encapsulating prococol */ 209 u_int8_t proto; /* encapsulated protocol */ 210 u_int8_t tmode; 211 char *string; 212 u_int16_t port; 213 struct ipsec_hosts hosts; 214 struct ipsec_hosts peers; 215 struct ipsec_addr_wrap *anyhost; 216 struct ipsec_addr_wrap *singlehost; 217 struct ipsec_addr_wrap *host; 218 struct { 219 char *srcid; 220 char *dstid; 221 } ids; 222 char *id; 223 u_int8_t type; 224 struct ike_auth ikeauth; 225 struct { 226 u_int32_t spiout; 227 u_int32_t spiin; 228 } spis; 229 struct { 230 struct ipsec_key *keyout; 231 struct ipsec_key *keyin; 232 } authkeys; 233 struct { 234 struct ipsec_key *keyout; 235 struct ipsec_key *keyin; 236 } enckeys; 237 struct { 238 struct ipsec_key *keyout; 239 struct ipsec_key *keyin; 240 } keys; 241 struct ipsec_transforms *transforms; 242 struct ipsec_life *life; 243 struct ike_mode *mode; 244 } v; 245 int lineno; 246} YYSTYPE; 247 248%} 249 250%token FLOW FROM ESP AH IN PEER ON OUT TO SRCID DSTID RSA PSK TCPMD5 SPI 251%token AUTHKEY ENCKEY FILENAME AUTHXF ENCXF ERROR IKE MAIN QUICK AGGRESSIVE 252%token PASSIVE ACTIVE ANY IPIP IPCOMP COMPXF TUNNEL TRANSPORT DYNAMIC LIFE 253%token TYPE DENY BYPASS LOCAL PROTO USE ACQUIRE REQUIRE DONTACQ GROUP PORT TAG 254%token INCLUDE 255%token <v.string> STRING 256%token <v.number> NUMBER 257%type <v.string> string 258%type <v.dir> dir 259%type <v.satype> satype 260%type <v.proto> proto 261%type <v.number> protoval 262%type <v.tmode> tmode 263%type <v.hosts> hosts 264%type <v.port> port 265%type <v.number> portval 266%type <v.peers> peers 267%type <v.anyhost> anyhost 268%type <v.singlehost> singlehost 269%type <v.host> host host_list host_spec 270%type <v.ids> ids 271%type <v.id> id 272%type <v.spis> spispec 273%type <v.authkeys> authkeyspec 274%type <v.enckeys> enckeyspec 275%type <v.keys> keyspec 276%type <v.transforms> transforms 277%type <v.ikemode> ikemode 278%type <v.ikeauth> ikeauth 279%type <v.type> type 280%type <v.life> life 281%type <v.mode> phase1mode phase2mode 282%type <v.string> tag 283%% 284 285grammar : /* empty */ 286 | grammar include '\n' 287 | grammar '\n' 288 | grammar ikerule '\n' 289 | grammar flowrule '\n' 290 | grammar sarule '\n' 291 | grammar tcpmd5rule '\n' 292 | grammar varset '\n' 293 | grammar error '\n' { file->errors++; } 294 ; 295 296comma : ',' 297 | /* empty */ 298 ; 299 300include : INCLUDE STRING { 301 struct file *nfile; 302 303 if ((nfile = pushfile($2, 0)) == NULL) { 304 yyerror("failed to include file %s", $2); 305 free($2); 306 YYERROR; 307 } 308 free($2); 309 310 file = nfile; 311 lungetc('\n'); 312 } 313 ; 314 315tcpmd5rule : TCPMD5 hosts spispec authkeyspec { 316 struct ipsec_rule *r; 317 318 r = create_sa(IPSEC_TCPMD5, IPSEC_TRANSPORT, &$2, 319 $3.spiout, NULL, $4.keyout, NULL); 320 if (r == NULL) 321 YYERROR; 322 323 if (expand_rule(r, NULL, 0, $3.spiin, $4.keyin, NULL, 324 0)) 325 errx(1, "tcpmd5rule: expand_rule"); 326 } 327 ; 328 329sarule : satype tmode hosts spispec transforms authkeyspec 330 enckeyspec { 331 struct ipsec_rule *r; 332 333 r = create_sa($1, $2, &$3, $4.spiout, $5, $6.keyout, 334 $7.keyout); 335 if (r == NULL) 336 YYERROR; 337 338 if (expand_rule(r, NULL, 0, $4.spiin, $6.keyin, 339 $7.keyin, 1)) 340 errx(1, "sarule: expand_rule"); 341 } 342 ; 343 344flowrule : FLOW satype dir proto hosts peers ids type { 345 struct ipsec_rule *r; 346 347 r = create_flow($3, $4, &$5, $2, $7.srcid, 348 $7.dstid, $8); 349 if (r == NULL) 350 YYERROR; 351 352 if (expand_rule(r, &$6, $3, 0, NULL, NULL, 0)) 353 errx(1, "flowrule: expand_rule"); 354 } 355 ; 356 357ikerule : IKE ikemode satype tmode proto hosts peers 358 phase1mode phase2mode ids ikeauth tag { 359 struct ipsec_rule *r; 360 361 r = create_ike($5, &$6, $8, $9, $3, $4, $2, 362 $10.srcid, $10.dstid, &$11, $12); 363 if (r == NULL) 364 YYERROR; 365 366 if (expand_rule(r, &$7, 0, 0, NULL, NULL, 0)) 367 errx(1, "ikerule: expand_rule"); 368 } 369 ; 370 371satype : /* empty */ { $$ = IPSEC_ESP; } 372 | ESP { $$ = IPSEC_ESP; } 373 | AH { $$ = IPSEC_AH; } 374 | IPCOMP { $$ = IPSEC_IPCOMP; } 375 | IPIP { $$ = IPSEC_IPIP; } 376 ; 377 378proto : /* empty */ { $$ = 0; } 379 | PROTO protoval { $$ = $2; } 380 | PROTO ESP { $$ = IPPROTO_ESP; } 381 | PROTO AH { $$ = IPPROTO_AH; } 382 ; 383 384protoval : STRING { 385 struct protoent *p; 386 387 p = getprotobyname($1); 388 if (p == NULL) { 389 yyerror("unknown protocol: %s", $1); 390 YYERROR; 391 } 392 $$ = p->p_proto; 393 free($1); 394 } 395 | NUMBER { 396 if ($1 > 255 || $1 < 0) { 397 yyerror("protocol outside range"); 398 YYERROR; 399 } 400 } 401 ; 402 403tmode : /* empty */ { $$ = IPSEC_TUNNEL; } 404 | TUNNEL { $$ = IPSEC_TUNNEL; } 405 | TRANSPORT { $$ = IPSEC_TRANSPORT; } 406 ; 407 408dir : /* empty */ { $$ = IPSEC_INOUT; } 409 | IN { $$ = IPSEC_IN; } 410 | OUT { $$ = IPSEC_OUT; } 411 ; 412 413hosts : FROM host port TO host port { 414 struct ipsec_addr_wrap *ipa; 415 for (ipa = $5; ipa; ipa = ipa->next) { 416 if (ipa->srcnat) { 417 yyerror("no flow NAT support for" 418 " destination network: %s", ipa->name); 419 YYERROR; 420 } 421 } 422 $$.src = $2; 423 $$.sport = $3; 424 $$.dst = $5; 425 $$.dport = $6; 426 } 427 | TO host port FROM host port { 428 struct ipsec_addr_wrap *ipa; 429 for (ipa = $2; ipa; ipa = ipa->next) { 430 if (ipa->srcnat) { 431 yyerror("no flow NAT support for" 432 " destination network: %s", ipa->name); 433 YYERROR; 434 } 435 } 436 $$.src = $5; 437 $$.sport = $6; 438 $$.dst = $2; 439 $$.dport = $3; 440 } 441 ; 442 443port : /* empty */ { $$ = 0; } 444 | PORT portval { $$ = $2; } 445 ; 446 447portval : STRING { 448 struct servent *s; 449 450 if ((s = getservbyname($1, "tcp")) != NULL || 451 (s = getservbyname($1, "udp")) != NULL) { 452 $$ = s->s_port; 453 } else { 454 yyerror("unknown port: %s", $1); 455 YYERROR; 456 } 457 } 458 | NUMBER { 459 if ($1 > USHRT_MAX || $1 < 0) { 460 yyerror("port outside range"); 461 YYERROR; 462 } 463 $$ = htons($1); 464 } 465 ; 466 467peers : /* empty */ { 468 $$.dst = NULL; 469 $$.src = NULL; 470 } 471 | PEER anyhost LOCAL singlehost { 472 $$.dst = $2; 473 $$.src = $4; 474 } 475 | LOCAL singlehost PEER anyhost { 476 $$.dst = $4; 477 $$.src = $2; 478 } 479 | PEER anyhost { 480 $$.dst = $2; 481 $$.src = NULL; 482 } 483 | LOCAL singlehost { 484 $$.dst = NULL; 485 $$.src = $2; 486 } 487 ; 488 489anyhost : singlehost { $$ = $1; } 490 | ANY { 491 $$ = host_any(); 492 } 493 494singlehost : /* empty */ { $$ = NULL; } 495 | STRING { 496 if (($$ = host($1)) == NULL) { 497 free($1); 498 yyerror("could not parse host specification"); 499 YYERROR; 500 } 501 free($1); 502 } 503 ; 504 505host_list : host { $$ = $1; } 506 | host_list comma host { 507 if ($3 == NULL) 508 $$ = $1; 509 else if ($1 == NULL) 510 $$ = $3; 511 else { 512 $1->tail->next = $3; 513 $1->tail = $3->tail; 514 $$ = $1; 515 } 516 } 517 ; 518 519host_spec : STRING { 520 if (($$ = host($1)) == NULL) { 521 free($1); 522 yyerror("could not parse host specification"); 523 YYERROR; 524 } 525 free($1); 526 } 527 | STRING '/' NUMBER { 528 char *buf; 529 530 if (asprintf(&buf, "%s/%lld", $1, $3) == -1) 531 err(1, "host: asprintf"); 532 free($1); 533 if (($$ = host(buf)) == NULL) { 534 free(buf); 535 yyerror("could not parse host specification"); 536 YYERROR; 537 } 538 free(buf); 539 } 540 ; 541 542host : host_spec { $$ = $1; } 543 | host_spec '(' host_spec ')' { 544 if ($3->af != $1->af) { 545 yyerror("Flow NAT address family mismatch"); 546 YYERROR; 547 } 548 $$ = $1; 549 $$->srcnat = $3; 550 } 551 | ANY { 552 $$ = host_any(); 553 } 554 | '{' host_list '}' { $$ = $2; } 555 ; 556 557ids : /* empty */ { 558 $$.srcid = NULL; 559 $$.dstid = NULL; 560 } 561 | SRCID id DSTID id { 562 $$.srcid = $2; 563 $$.dstid = $4; 564 } 565 | SRCID id { 566 $$.srcid = $2; 567 $$.dstid = NULL; 568 } 569 | DSTID id { 570 $$.srcid = NULL; 571 $$.dstid = $2; 572 } 573 ; 574 575type : /* empty */ { 576 $$ = TYPE_REQUIRE; 577 } 578 | TYPE USE { 579 $$ = TYPE_USE; 580 } 581 | TYPE ACQUIRE { 582 $$ = TYPE_ACQUIRE; 583 } 584 | TYPE REQUIRE { 585 $$ = TYPE_REQUIRE; 586 } 587 | TYPE DENY { 588 $$ = TYPE_DENY; 589 } 590 | TYPE BYPASS { 591 $$ = TYPE_BYPASS; 592 } 593 | TYPE DONTACQ { 594 $$ = TYPE_DONTACQ; 595 } 596 ; 597 598id : STRING { $$ = $1; } 599 ; 600 601spispec : SPI STRING { 602 u_int32_t spi; 603 char *p = strchr($2, ':'); 604 605 if (p != NULL) { 606 *p++ = 0; 607 608 if (atospi(p, &spi) == -1) { 609 free($2); 610 YYERROR; 611 } 612 $$.spiin = spi; 613 } else 614 $$.spiin = 0; 615 616 if (atospi($2, &spi) == -1) { 617 free($2); 618 YYERROR; 619 } 620 $$.spiout = spi; 621 622 623 free($2); 624 } 625 | SPI NUMBER { 626 if ($2 > UINT_MAX || $2 < 0) { 627 yyerror("%lld not a valid spi", $2); 628 YYERROR; 629 } 630 if ($2 >= SPI_RESERVED_MIN && $2 <= SPI_RESERVED_MAX) { 631 yyerror("%lld within reserved spi range", $2); 632 YYERROR; 633 } 634 635 $$.spiin = 0; 636 $$.spiout = $2; 637 } 638 ; 639 640transforms : { 641 if ((ipsec_transforms = calloc(1, 642 sizeof(struct ipsec_transforms))) == NULL) 643 err(1, "transforms: calloc"); 644 } 645 transforms_l 646 { $$ = ipsec_transforms; } 647 | /* empty */ { 648 if (($$ = calloc(1, 649 sizeof(struct ipsec_transforms))) == NULL) 650 err(1, "transforms: calloc"); 651 } 652 ; 653 654transforms_l : transforms_l transform 655 | transform 656 ; 657 658transform : AUTHXF STRING { 659 if (ipsec_transforms->authxf) 660 yyerror("auth already set"); 661 else { 662 ipsec_transforms->authxf = parse_xf($2, 663 authxfs); 664 if (!ipsec_transforms->authxf) 665 yyerror("%s not a valid transform", $2); 666 } 667 } 668 | ENCXF STRING { 669 if (ipsec_transforms->encxf) 670 yyerror("enc already set"); 671 else { 672 ipsec_transforms->encxf = parse_xf($2, encxfs); 673 if (!ipsec_transforms->encxf) 674 yyerror("%s not a valid transform", $2); 675 } 676 } 677 | COMPXF STRING { 678 if (ipsec_transforms->compxf) 679 yyerror("comp already set"); 680 else { 681 ipsec_transforms->compxf = parse_xf($2, 682 compxfs); 683 if (!ipsec_transforms->compxf) 684 yyerror("%s not a valid transform", $2); 685 } 686 } 687 | GROUP STRING { 688 if (ipsec_transforms->groupxf) 689 yyerror("group already set"); 690 else { 691 ipsec_transforms->groupxf = parse_xf($2, 692 groupxfs); 693 if (!ipsec_transforms->groupxf) 694 yyerror("%s not a valid transform", $2); 695 } 696 } 697 ; 698 699phase1mode : /* empty */ { 700 struct ike_mode *p1; 701 702 /* We create just an empty main mode */ 703 if ((p1 = calloc(1, sizeof(struct ike_mode))) == NULL) 704 err(1, "phase1mode: calloc"); 705 p1->ike_exch = IKE_MM; 706 $$ = p1; 707 } 708 | MAIN transforms life { 709 struct ike_mode *p1; 710 711 if ((p1 = calloc(1, sizeof(struct ike_mode))) == NULL) 712 err(1, "phase1mode: calloc"); 713 p1->xfs = $2; 714 p1->life = $3; 715 p1->ike_exch = IKE_MM; 716 $$ = p1; 717 } 718 | AGGRESSIVE transforms life { 719 struct ike_mode *p1; 720 721 if ((p1 = calloc(1, sizeof(struct ike_mode))) == NULL) 722 err(1, "phase1mode: calloc"); 723 p1->xfs = $2; 724 p1->life = $3; 725 p1->ike_exch = IKE_AM; 726 $$ = p1; 727 } 728 ; 729 730phase2mode : /* empty */ { 731 struct ike_mode *p2; 732 733 /* We create just an empty quick mode */ 734 if ((p2 = calloc(1, sizeof(struct ike_mode))) == NULL) 735 err(1, "phase1mode: calloc"); 736 p2->ike_exch = IKE_QM; 737 $$ = p2; 738 } 739 | QUICK transforms life { 740 struct ike_mode *p2; 741 742 if ((p2 = calloc(1, sizeof(struct ike_mode))) == NULL) 743 err(1, "phase1mode: calloc"); 744 p2->xfs = $2; 745 p2->life = $3; 746 p2->ike_exch = IKE_QM; 747 $$ = p2; 748 } 749 ; 750 751life : /* empty */ { 752 struct ipsec_life *life; 753 754 /* We create just an empty transform */ 755 if ((life = calloc(1, sizeof(struct ipsec_life))) 756 == NULL) 757 err(1, "life: calloc"); 758 life->lifetime = -1; 759 life->lifevolume = -1; 760 $$ = life; 761 } 762 | LIFE NUMBER { 763 if ($2 > INT_MAX || $2 < 0) { 764 yyerror("%lld not a valid lifetime", $2); 765 YYERROR; 766 } 767 $$ = parse_life($2); 768 } 769 ; 770 771authkeyspec : /* empty */ { 772 $$.keyout = NULL; 773 $$.keyin = NULL; 774 } 775 | AUTHKEY keyspec { 776 $$.keyout = $2.keyout; 777 $$.keyin = $2.keyin; 778 } 779 ; 780 781enckeyspec : /* empty */ { 782 $$.keyout = NULL; 783 $$.keyin = NULL; 784 } 785 | ENCKEY keyspec { 786 $$.keyout = $2.keyout; 787 $$.keyin = $2.keyin; 788 } 789 ; 790 791keyspec : STRING { 792 unsigned char *hex; 793 unsigned char *p = strchr($1, ':'); 794 795 if (p != NULL ) { 796 *p++ = 0; 797 798 if (!strncmp(p, "0x", 2)) 799 p += 2; 800 $$.keyin = parsekey(p, strlen(p)); 801 } else 802 $$.keyin = NULL; 803 804 hex = $1; 805 if (!strncmp(hex, "0x", 2)) 806 hex += 2; 807 $$.keyout = parsekey(hex, strlen(hex)); 808 809 free($1); 810 } 811 | FILENAME STRING { 812 unsigned char *p = strchr($2, ':'); 813 814 if (p != NULL) { 815 *p++ = 0; 816 $$.keyin = parsekeyfile(p); 817 } 818 $$.keyout = parsekeyfile($2); 819 free($2); 820 } 821 ; 822 823ikemode : /* empty */ { $$ = IKE_ACTIVE; } 824 | PASSIVE { $$ = IKE_PASSIVE; } 825 | DYNAMIC { $$ = IKE_DYNAMIC; } 826 | ACTIVE { $$ = IKE_ACTIVE; } 827 ; 828 829ikeauth : /* empty */ { 830 $$.type = IKE_AUTH_RSA; 831 $$.string = NULL; 832 } 833 | RSA { 834 $$.type = IKE_AUTH_RSA; 835 $$.string = NULL; 836 } 837 | PSK STRING { 838 $$.type = IKE_AUTH_PSK; 839 if (($$.string = strdup($2)) == NULL) 840 err(1, "ikeauth: strdup"); 841 } 842 ; 843 844tag : /* empty */ 845 { 846 $$ = NULL; 847 } 848 | TAG STRING 849 { 850 $$ = $2; 851 } 852 ; 853 854string : string STRING 855 { 856 if (asprintf(&$$, "%s %s", $1, $2) == -1) 857 err(1, "string: asprintf"); 858 free($1); 859 free($2); 860 } 861 | STRING 862 ; 863 864varset : STRING '=' string 865 { 866 if (ipsec->opts & IPSECCTL_OPT_VERBOSE) 867 printf("%s = \"%s\"\n", $1, $3); 868 if (symset($1, $3, 0) == -1) 869 err(1, "cannot store variable"); 870 free($1); 871 free($3); 872 } 873 ; 874 875%% 876 877struct keywords { 878 const char *k_name; 879 int k_val; 880}; 881 882int 883yyerror(const char *fmt, ...) 884{ 885 va_list ap; 886 887 file->errors++; 888 va_start(ap, fmt); 889 fprintf(stderr, "%s: %d: ", file->name, yylval.lineno); 890 vfprintf(stderr, fmt, ap); 891 fprintf(stderr, "\n"); 892 va_end(ap); 893 return (0); 894} 895 896int 897yywarn(const char *fmt, ...) 898{ 899 va_list ap; 900 901 va_start(ap, fmt); 902 fprintf(stderr, "%s: %d: ", file->name, yylval.lineno); 903 vfprintf(stderr, fmt, ap); 904 fprintf(stderr, "\n"); 905 va_end(ap); 906 return (0); 907} 908 909int 910kw_cmp(const void *k, const void *e) 911{ 912 return (strcmp(k, ((const struct keywords *)e)->k_name)); 913} 914 915int 916lookup(char *s) 917{ 918 /* this has to be sorted always */ 919 static const struct keywords keywords[] = { 920 { "acquire", ACQUIRE }, 921 { "active", ACTIVE }, 922 { "aggressive", AGGRESSIVE }, 923 { "ah", AH }, 924 { "any", ANY }, 925 { "auth", AUTHXF }, 926 { "authkey", AUTHKEY }, 927 { "bypass", BYPASS }, 928 { "comp", COMPXF }, 929 { "deny", DENY }, 930 { "dontacq", DONTACQ }, 931 { "dstid", DSTID }, 932 { "dynamic", DYNAMIC }, 933 { "enc", ENCXF }, 934 { "enckey", ENCKEY }, 935 { "esp", ESP }, 936 { "file", FILENAME }, 937 { "flow", FLOW }, 938 { "from", FROM }, 939 { "group", GROUP }, 940 { "ike", IKE }, 941 { "in", IN }, 942 { "include", INCLUDE }, 943 { "ipcomp", IPCOMP }, 944 { "ipip", IPIP }, 945 { "life", LIFE }, 946 { "local", LOCAL }, 947 { "main", MAIN }, 948 { "out", OUT }, 949 { "passive", PASSIVE }, 950 { "peer", PEER }, 951 { "port", PORT }, 952 { "proto", PROTO }, 953 { "psk", PSK }, 954 { "quick", QUICK }, 955 { "require", REQUIRE }, 956 { "rsa", RSA }, 957 { "spi", SPI }, 958 { "srcid", SRCID }, 959 { "tag", TAG }, 960 { "tcpmd5", TCPMD5 }, 961 { "to", TO }, 962 { "transport", TRANSPORT }, 963 { "tunnel", TUNNEL }, 964 { "type", TYPE }, 965 { "use", USE } 966 }; 967 const struct keywords *p; 968 969 p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]), 970 sizeof(keywords[0]), kw_cmp); 971 972 if (p) { 973 if (debug > 1) 974 fprintf(stderr, "%s: %d\n", s, p->k_val); 975 return (p->k_val); 976 } else { 977 if (debug > 1) 978 fprintf(stderr, "string: %s\n", s); 979 return (STRING); 980 } 981} 982 983#define MAXPUSHBACK 128 984 985char *parsebuf; 986int parseindex; 987char pushback_buffer[MAXPUSHBACK]; 988int pushback_index = 0; 989 990int 991lgetc(int quotec) 992{ 993 int c, next; 994 995 if (parsebuf) { 996 /* Read character from the parsebuffer instead of input. */ 997 if (parseindex >= 0) { 998 c = parsebuf[parseindex++]; 999 if (c != '\0') 1000 return (c); 1001 parsebuf = NULL; 1002 } else 1003 parseindex++; 1004 } 1005 1006 if (pushback_index) 1007 return (pushback_buffer[--pushback_index]); 1008 1009 if (quotec) { 1010 if ((c = getc(file->stream)) == EOF) { 1011 yyerror("reached end of file while parsing quoted string"); 1012 if (popfile() == EOF) 1013 return (EOF); 1014 return (quotec); 1015 } 1016 return (c); 1017 } 1018 1019 while ((c = getc(file->stream)) == '\\') { 1020 next = getc(file->stream); 1021 if (next != '\n') { 1022 c = next; 1023 break; 1024 } 1025 yylval.lineno = file->lineno; 1026 file->lineno++; 1027 } 1028 1029 while (c == EOF) { 1030 if (popfile() == EOF) 1031 return (EOF); 1032 c = getc(file->stream); 1033 } 1034 return (c); 1035} 1036 1037int 1038lungetc(int c) 1039{ 1040 if (c == EOF) 1041 return (EOF); 1042 if (parsebuf) { 1043 parseindex--; 1044 if (parseindex >= 0) 1045 return (c); 1046 } 1047 if (pushback_index < MAXPUSHBACK-1) 1048 return (pushback_buffer[pushback_index++] = c); 1049 else 1050 return (EOF); 1051} 1052 1053int 1054findeol(void) 1055{ 1056 int c; 1057 1058 parsebuf = NULL; 1059 1060 /* skip to either EOF or the first real EOL */ 1061 while (1) { 1062 if (pushback_index) 1063 c = pushback_buffer[--pushback_index]; 1064 else 1065 c = lgetc(0); 1066 if (c == '\n') { 1067 file->lineno++; 1068 break; 1069 } 1070 if (c == EOF) 1071 break; 1072 } 1073 return (ERROR); 1074} 1075 1076int 1077yylex(void) 1078{ 1079 char buf[8096]; 1080 char *p, *val; 1081 int quotec, next, c; 1082 int token; 1083 1084top: 1085 p = buf; 1086 while ((c = lgetc(0)) == ' ' || c == '\t') 1087 ; /* nothing */ 1088 1089 yylval.lineno = file->lineno; 1090 if (c == '#') 1091 while ((c = lgetc(0)) != '\n' && c != EOF) 1092 ; /* nothing */ 1093 if (c == '$' && parsebuf == NULL) { 1094 while (1) { 1095 if ((c = lgetc(0)) == EOF) 1096 return (0); 1097 1098 if (p + 1 >= buf + sizeof(buf) - 1) { 1099 yyerror("string too long"); 1100 return (findeol()); 1101 } 1102 if (isalnum(c) || c == '_') { 1103 *p++ = (char)c; 1104 continue; 1105 } 1106 *p = '\0'; 1107 lungetc(c); 1108 break; 1109 } 1110 val = symget(buf); 1111 if (val == NULL) { 1112 yyerror("macro '%s' not defined", buf); 1113 return (findeol()); 1114 } 1115 parsebuf = val; 1116 parseindex = 0; 1117 goto top; 1118 } 1119 1120 switch (c) { 1121 case '\'': 1122 case '"': 1123 quotec = c; 1124 while (1) { 1125 if ((c = lgetc(quotec)) == EOF) 1126 return (0); 1127 if (c == '\n') { 1128 file->lineno++; 1129 continue; 1130 } else if (c == '\\') { 1131 if ((next = lgetc(quotec)) == EOF) 1132 return (0); 1133 if (next == quotec || c == ' ' || c == '\t') 1134 c = next; 1135 else if (next == '\n') 1136 continue; 1137 else 1138 lungetc(next); 1139 } else if (c == quotec) { 1140 *p = '\0'; 1141 break; 1142 } 1143 if (p + 1 >= buf + sizeof(buf) - 1) { 1144 yyerror("string too long"); 1145 return (findeol()); 1146 } 1147 *p++ = (char)c; 1148 } 1149 yylval.v.string = strdup(buf); 1150 if (yylval.v.string == NULL) 1151 err(1, "yylex: strdup"); 1152 return (STRING); 1153 } 1154 1155#define allowed_to_end_number(x) \ 1156 (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=') 1157 1158 if (c == '-' || isdigit(c)) { 1159 do { 1160 *p++ = c; 1161 if ((unsigned)(p-buf) >= sizeof(buf)) { 1162 yyerror("string too long"); 1163 return (findeol()); 1164 } 1165 } while ((c = lgetc(0)) != EOF && isdigit(c)); 1166 lungetc(c); 1167 if (p == buf + 1 && buf[0] == '-') 1168 goto nodigits; 1169 if (c == EOF || allowed_to_end_number(c)) { 1170 const char *errstr = NULL; 1171 1172 *p = '\0'; 1173 yylval.v.number = strtonum(buf, LLONG_MIN, 1174 LLONG_MAX, &errstr); 1175 if (errstr) { 1176 yyerror("\"%s\" invalid number: %s", 1177 buf, errstr); 1178 return (findeol()); 1179 } 1180 return (NUMBER); 1181 } else { 1182nodigits: 1183 while (p > buf + 1) 1184 lungetc(*--p); 1185 c = *--p; 1186 if (c == '-') 1187 return (c); 1188 } 1189 } 1190 1191#define allowed_in_string(x) \ 1192 (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \ 1193 x != '{' && x != '}' && x != '<' && x != '>' && \ 1194 x != '!' && x != '=' && x != '/' && x != '#' && \ 1195 x != ',')) 1196 1197 if (isalnum(c) || c == ':' || c == '_' || c == '*') { 1198 do { 1199 *p++ = c; 1200 if ((unsigned)(p-buf) >= sizeof(buf)) { 1201 yyerror("string too long"); 1202 return (findeol()); 1203 } 1204 } while ((c = lgetc(0)) != EOF && (allowed_in_string(c))); 1205 lungetc(c); 1206 *p = '\0'; 1207 if ((token = lookup(buf)) == STRING) 1208 if ((yylval.v.string = strdup(buf)) == NULL) 1209 err(1, "yylex: strdup"); 1210 return (token); 1211 } 1212 if (c == '\n') { 1213 yylval.lineno = file->lineno; 1214 file->lineno++; 1215 } 1216 if (c == EOF) 1217 return (0); 1218 return (c); 1219} 1220 1221int 1222check_file_secrecy(int fd, const char *fname) 1223{ 1224 struct stat st; 1225 1226 if (fstat(fd, &st)) { 1227 warn("cannot stat %s", fname); 1228 return (-1); 1229 } 1230 if (st.st_uid != 0 && st.st_uid != getuid()) { 1231 warnx("%s: owner not root or current user", fname); 1232 return (-1); 1233 } 1234 if (st.st_mode & (S_IRWXG | S_IRWXO)) { 1235 warnx("%s: group/world readable/writeable", fname); 1236 return (-1); 1237 } 1238 return (0); 1239} 1240 1241struct file * 1242pushfile(const char *name, int secret) 1243{ 1244 struct file *nfile; 1245 1246 if ((nfile = calloc(1, sizeof(struct file))) == NULL) { 1247 warn("malloc"); 1248 return (NULL); 1249 } 1250 if ((nfile->name = strdup(name)) == NULL) { 1251 warn("malloc"); 1252 free(nfile); 1253 return (NULL); 1254 } 1255 if (TAILQ_FIRST(&files) == NULL && strcmp(nfile->name, "-") == 0) { 1256 nfile->stream = stdin; 1257 free(nfile->name); 1258 if ((nfile->name = strdup("stdin")) == NULL) { 1259 warn("strdup"); 1260 free(nfile); 1261 return (NULL); 1262 } 1263 } else if ((nfile->stream = fopen(nfile->name, "r")) == NULL) { 1264 warn("%s", nfile->name); 1265 free(nfile->name); 1266 free(nfile); 1267 return (NULL); 1268 } else if (secret && 1269 check_file_secrecy(fileno(nfile->stream), nfile->name)) { 1270 fclose(nfile->stream); 1271 free(nfile->name); 1272 free(nfile); 1273 return (NULL); 1274 } 1275 nfile->lineno = 1; 1276 TAILQ_INSERT_TAIL(&files, nfile, entry); 1277 return (nfile); 1278} 1279 1280int 1281popfile(void) 1282{ 1283 struct file *prev; 1284 1285 if ((prev = TAILQ_PREV(file, files, entry)) != NULL) { 1286 prev->errors += file->errors; 1287 TAILQ_REMOVE(&files, file, entry); 1288 fclose(file->stream); 1289 free(file->name); 1290 free(file); 1291 file = prev; 1292 return (0); 1293 } 1294 return (EOF); 1295} 1296 1297int 1298parse_rules(const char *filename, struct ipsecctl *ipsecx) 1299{ 1300 struct sym *sym; 1301 int errors = 0; 1302 1303 ipsec = ipsecx; 1304 1305 if ((file = pushfile(filename, 1)) == NULL) { 1306 return (-1); 1307 } 1308 1309 yyparse(); 1310 errors = file->errors; 1311 popfile(); 1312 1313 /* Free macros and check which have not been used. */ 1314 while ((sym = TAILQ_FIRST(&symhead))) { 1315 if ((ipsec->opts & IPSECCTL_OPT_VERBOSE2) && !sym->used) 1316 fprintf(stderr, "warning: macro '%s' not " 1317 "used\n", sym->nam); 1318 free(sym->nam); 1319 free(sym->val); 1320 TAILQ_REMOVE(&symhead, sym, entry); 1321 free(sym); 1322 } 1323 1324 return (errors ? -1 : 0); 1325} 1326 1327int 1328symset(const char *nam, const char *val, int persist) 1329{ 1330 struct sym *sym; 1331 1332 for (sym = TAILQ_FIRST(&symhead); sym && strcmp(nam, sym->nam); 1333 sym = TAILQ_NEXT(sym, entry)) 1334 ; /* nothing */ 1335 1336 if (sym != NULL) { 1337 if (sym->persist == 1) 1338 return (0); 1339 else { 1340 free(sym->nam); 1341 free(sym->val); 1342 TAILQ_REMOVE(&symhead, sym, entry); 1343 free(sym); 1344 } 1345 } 1346 if ((sym = calloc(1, sizeof(*sym))) == NULL) 1347 return (-1); 1348 1349 sym->nam = strdup(nam); 1350 if (sym->nam == NULL) { 1351 free(sym); 1352 return (-1); 1353 } 1354 sym->val = strdup(val); 1355 if (sym->val == NULL) { 1356 free(sym->nam); 1357 free(sym); 1358 return (-1); 1359 } 1360 sym->used = 0; 1361 sym->persist = persist; 1362 TAILQ_INSERT_TAIL(&symhead, sym, entry); 1363 return (0); 1364} 1365 1366int 1367cmdline_symset(char *s) 1368{ 1369 char *sym, *val; 1370 int ret; 1371 size_t len; 1372 1373 if ((val = strrchr(s, '=')) == NULL) 1374 return (-1); 1375 1376 len = strlen(s) - strlen(val) + 1; 1377 if ((sym = malloc(len)) == NULL) 1378 err(1, "cmdline_symset: malloc"); 1379 1380 strlcpy(sym, s, len); 1381 1382 ret = symset(sym, val + 1, 1); 1383 free(sym); 1384 1385 return (ret); 1386} 1387 1388char * 1389symget(const char *nam) 1390{ 1391 struct sym *sym; 1392 1393 TAILQ_FOREACH(sym, &symhead, entry) 1394 if (strcmp(nam, sym->nam) == 0) { 1395 sym->used = 1; 1396 return (sym->val); 1397 } 1398 return (NULL); 1399} 1400 1401int 1402atoul(char *s, u_long *ulvalp) 1403{ 1404 u_long ulval; 1405 char *ep; 1406 1407 errno = 0; 1408 ulval = strtoul(s, &ep, 0); 1409 if (s[0] == '\0' || *ep != '\0') 1410 return (-1); 1411 if (errno == ERANGE && ulval == ULONG_MAX) 1412 return (-1); 1413 *ulvalp = ulval; 1414 return (0); 1415} 1416 1417int 1418atospi(char *s, u_int32_t *spivalp) 1419{ 1420 unsigned long ulval; 1421 1422 if (atoul(s, &ulval) == -1) 1423 return (-1); 1424 if (ulval > UINT_MAX) { 1425 yyerror("%lld not a valid spi", ulval); 1426 return (-1); 1427 } 1428 if (ulval >= SPI_RESERVED_MIN && ulval <= SPI_RESERVED_MAX) { 1429 yyerror("%lld within reserved spi range", ulval); 1430 return (-1); 1431 } 1432 *spivalp = ulval; 1433 return (0); 1434} 1435 1436u_int8_t 1437x2i(unsigned char *s) 1438{ 1439 char ss[3]; 1440 1441 ss[0] = s[0]; 1442 ss[1] = s[1]; 1443 ss[2] = 0; 1444 1445 if (!isxdigit(s[0]) || !isxdigit(s[1])) { 1446 yyerror("keys need to be specified in hex digits"); 1447 return (-1); 1448 } 1449 return ((u_int8_t)strtoul(ss, NULL, 16)); 1450} 1451 1452struct ipsec_key * 1453parsekey(unsigned char *hexkey, size_t len) 1454{ 1455 struct ipsec_key *key; 1456 int i; 1457 1458 key = calloc(1, sizeof(struct ipsec_key)); 1459 if (key == NULL) 1460 err(1, "parsekey: calloc"); 1461 1462 key->len = len / 2; 1463 key->data = calloc(key->len, sizeof(u_int8_t)); 1464 if (key->data == NULL) 1465 err(1, "parsekey: calloc"); 1466 1467 for (i = 0; i < (int)key->len; i++) 1468 key->data[i] = x2i(hexkey + 2 * i); 1469 1470 return (key); 1471} 1472 1473struct ipsec_key * 1474parsekeyfile(char *filename) 1475{ 1476 struct stat sb; 1477 int fd; 1478 unsigned char *hex; 1479 1480 if ((fd = open(filename, O_RDONLY)) < 0) 1481 err(1, "open %s", filename); 1482 if (fstat(fd, &sb) < 0) 1483 err(1, "parsekeyfile: stat %s", filename); 1484 if ((sb.st_size > KEYSIZE_LIMIT) || (sb.st_size == 0)) 1485 errx(1, "%s: key too %s", filename, sb.st_size ? "large" : 1486 "small"); 1487 if ((hex = calloc(sb.st_size, sizeof(unsigned char))) == NULL) 1488 err(1, "parsekeyfile: calloc"); 1489 if (read(fd, hex, sb.st_size) < sb.st_size) 1490 err(1, "parsekeyfile: read"); 1491 close(fd); 1492 return (parsekey(hex, sb.st_size)); 1493} 1494 1495int 1496get_id_type(char *string) 1497{ 1498 struct in6_addr ia; 1499 1500 if (string == NULL) 1501 return (ID_UNKNOWN); 1502 1503 if (inet_pton(AF_INET, string, &ia) == 1) 1504 return (ID_IPV4); 1505 else if (inet_pton(AF_INET6, string, &ia) == 1) 1506 return (ID_IPV6); 1507 else if (strchr(string, '@')) 1508 return (ID_UFQDN); 1509 else 1510 return (ID_FQDN); 1511} 1512 1513struct ipsec_addr_wrap * 1514host(const char *s) 1515{ 1516 struct ipsec_addr_wrap *ipa = NULL; 1517 int mask, cont = 1; 1518 char *p, *q, *ps; 1519 1520 if ((p = strrchr(s, '/')) != NULL) { 1521 errno = 0; 1522 mask = strtol(p + 1, &q, 0); 1523 if (errno == ERANGE || !q || *q || mask > 128 || q == (p + 1)) 1524 errx(1, "host: invalid netmask '%s'", p); 1525 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL) 1526 err(1, "host: calloc"); 1527 strlcpy(ps, s, strlen(s) - strlen(p) + 1); 1528 } else { 1529 if ((ps = strdup(s)) == NULL) 1530 err(1, "host: strdup"); 1531 mask = -1; 1532 } 1533 1534 /* Does interface with this name exist? */ 1535 if (cont && (ipa = host_if(ps, mask)) != NULL) 1536 cont = 0; 1537 1538 /* IPv4 address? */ 1539 if (cont && (ipa = host_v4(s, mask == -1 ? 32 : mask)) != NULL) 1540 cont = 0; 1541 1542 /* IPv6 address? */ 1543 if (cont && (ipa = host_v6(ps, mask == -1 ? 128 : mask)) != NULL) 1544 cont = 0; 1545 1546 /* dns lookup */ 1547 if (cont && mask == -1 && (ipa = host_dns(s, mask)) != NULL) 1548 cont = 0; 1549 free(ps); 1550 1551 if (ipa == NULL || cont == 1) { 1552 fprintf(stderr, "no IP address found for %s\n", s); 1553 return (NULL); 1554 } 1555 return (ipa); 1556} 1557 1558struct ipsec_addr_wrap * 1559host_v6(const char *s, int prefixlen) 1560{ 1561 struct ipsec_addr_wrap *ipa = NULL; 1562 struct addrinfo hints, *res; 1563 char hbuf[NI_MAXHOST]; 1564 1565 bzero(&hints, sizeof(struct addrinfo)); 1566 hints.ai_family = AF_INET6; 1567 hints.ai_socktype = SOCK_STREAM; 1568 hints.ai_flags = AI_NUMERICHOST; 1569 if (getaddrinfo(s, NULL, &hints, &res)) 1570 return (NULL); 1571 if (res->ai_next) 1572 err(1, "host_v6: numeric hostname expanded to multiple item"); 1573 1574 ipa = calloc(1, sizeof(struct ipsec_addr_wrap)); 1575 if (ipa == NULL) 1576 err(1, "host_v6: calloc"); 1577 ipa->af = res->ai_family; 1578 memcpy(&ipa->address.v6, 1579 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 1580 sizeof(struct in6_addr)); 1581 if (prefixlen > 128) 1582 prefixlen = 128; 1583 ipa->next = NULL; 1584 ipa->tail = ipa; 1585 1586 set_ipmask(ipa, prefixlen); 1587 if (getnameinfo(res->ai_addr, res->ai_addrlen, 1588 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST)) { 1589 errx(1, "could not get a numeric hostname"); 1590 } 1591 1592 if (prefixlen != 128) { 1593 ipa->netaddress = 1; 1594 asprintf(&ipa->name, "%s/%d", hbuf, prefixlen); 1595 } else 1596 ipa->name = strdup(hbuf); 1597 if (ipa->name == NULL) 1598 err(1, "host_v6: strdup"); 1599 1600 freeaddrinfo(res); 1601 1602 return (ipa); 1603} 1604 1605struct ipsec_addr_wrap * 1606host_v4(const char *s, int mask) 1607{ 1608 struct ipsec_addr_wrap *ipa = NULL; 1609 struct in_addr ina; 1610 int bits = 32; 1611 1612 bzero(&ina, sizeof(struct in_addr)); 1613 if (strrchr(s, '/') != NULL) { 1614 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1) 1615 return (NULL); 1616 } else { 1617 if (inet_pton(AF_INET, s, &ina) != 1) 1618 return (NULL); 1619 } 1620 1621 ipa = calloc(1, sizeof(struct ipsec_addr_wrap)); 1622 if (ipa == NULL) 1623 err(1, "host_v4: calloc"); 1624 1625 ipa->address.v4 = ina; 1626 ipa->name = strdup(s); 1627 if (ipa->name == NULL) 1628 err(1, "host_v4: strdup"); 1629 ipa->af = AF_INET; 1630 ipa->next = NULL; 1631 ipa->tail = ipa; 1632 1633 set_ipmask(ipa, bits); 1634 if (strrchr(s, '/') != NULL) 1635 ipa->netaddress = 1; 1636 1637 return (ipa); 1638} 1639 1640struct ipsec_addr_wrap * 1641host_dns(const char *s, int mask) 1642{ 1643 struct ipsec_addr_wrap *ipa = NULL, *head = NULL; 1644 struct addrinfo hints, *res0, *res; 1645 int error; 1646 char hbuf[NI_MAXHOST]; 1647 1648 bzero(&hints, sizeof(struct addrinfo)); 1649 hints.ai_family = PF_UNSPEC; 1650 hints.ai_socktype = SOCK_STREAM; 1651 error = getaddrinfo(s, NULL, &hints, &res0); 1652 if (error) 1653 return (NULL); 1654 1655 for (res = res0; res; res = res->ai_next) { 1656 if (res->ai_family != AF_INET && res->ai_family != AF_INET6) 1657 continue; 1658 1659 ipa = calloc(1, sizeof(struct ipsec_addr_wrap)); 1660 if (ipa == NULL) 1661 err(1, "host_dns: calloc"); 1662 switch (res->ai_family) { 1663 case AF_INET: 1664 memcpy(&ipa->address.v4, 1665 &((struct sockaddr_in *)res->ai_addr)->sin_addr, 1666 sizeof(struct in_addr)); 1667 break; 1668 case AF_INET6: 1669 /* XXX we do not support scoped IPv6 address yet */ 1670 if (((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id) { 1671 free(ipa); 1672 continue; 1673 } 1674 memcpy(&ipa->address.v6, 1675 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 1676 sizeof(struct in6_addr)); 1677 break; 1678 } 1679 error = getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, 1680 sizeof(hbuf), NULL, 0, NI_NUMERICHOST); 1681 if (error) 1682 err(1, "host_dns: getnameinfo"); 1683 ipa->name = strdup(hbuf); 1684 if (ipa->name == NULL) 1685 err(1, "host_dns: strdup"); 1686 ipa->af = res->ai_family; 1687 ipa->next = NULL; 1688 ipa->tail = ipa; 1689 if (head == NULL) 1690 head = ipa; 1691 else { 1692 head->tail->next = ipa; 1693 head->tail = ipa; 1694 } 1695 1696 /* 1697 * XXX for now, no netmask support for IPv6. 1698 * but since there's no way to specify address family, once you 1699 * have IPv6 address on a host, you cannot use dns/netmask 1700 * syntax. 1701 */ 1702 if (ipa->af == AF_INET) 1703 set_ipmask(ipa, mask == -1 ? 32 : mask); 1704 else 1705 if (mask != -1) 1706 err(1, "host_dns: cannot apply netmask " 1707 "on non-IPv4 address"); 1708 } 1709 freeaddrinfo(res0); 1710 1711 return (head); 1712} 1713 1714struct ipsec_addr_wrap * 1715host_if(const char *s, int mask) 1716{ 1717 struct ipsec_addr_wrap *ipa = NULL; 1718 1719 if (ifa_exists(s)) 1720 ipa = ifa_lookup(s); 1721 1722 return (ipa); 1723} 1724 1725struct ipsec_addr_wrap * 1726host_any(void) 1727{ 1728 struct ipsec_addr_wrap *ipa; 1729 1730 ipa = calloc(1, sizeof(struct ipsec_addr_wrap)); 1731 if (ipa == NULL) 1732 err(1, "host_any: calloc"); 1733 ipa->af = AF_UNSPEC; 1734 ipa->netaddress = 1; 1735 ipa->tail = ipa; 1736 return (ipa); 1737} 1738 1739/* interface lookup routintes */ 1740 1741struct ipsec_addr_wrap *iftab; 1742 1743void 1744ifa_load(void) 1745{ 1746 struct ifaddrs *ifap, *ifa; 1747 struct ipsec_addr_wrap *n = NULL, *h = NULL; 1748 1749 if (getifaddrs(&ifap) < 0) 1750 err(1, "ifa_load: getifaddrs"); 1751 1752 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 1753 if (!(ifa->ifa_addr->sa_family == AF_INET || 1754 ifa->ifa_addr->sa_family == AF_INET6 || 1755 ifa->ifa_addr->sa_family == AF_LINK)) 1756 continue; 1757 n = calloc(1, sizeof(struct ipsec_addr_wrap)); 1758 if (n == NULL) 1759 err(1, "ifa_load: calloc"); 1760 n->af = ifa->ifa_addr->sa_family; 1761 if ((n->name = strdup(ifa->ifa_name)) == NULL) 1762 err(1, "ifa_load: strdup"); 1763 if (n->af == AF_INET) { 1764 n->af = AF_INET; 1765 memcpy(&n->address.v4, &((struct sockaddr_in *) 1766 ifa->ifa_addr)->sin_addr, 1767 sizeof(struct in_addr)); 1768 memcpy(&n->mask.v4, &((struct sockaddr_in *) 1769 ifa->ifa_netmask)->sin_addr, 1770 sizeof(struct in_addr)); 1771 } else if (n->af == AF_INET6) { 1772 n->af = AF_INET6; 1773 memcpy(&n->address.v6, &((struct sockaddr_in6 *) 1774 ifa->ifa_addr)->sin6_addr, 1775 sizeof(struct in6_addr)); 1776 memcpy(&n->mask.v6, &((struct sockaddr_in6 *) 1777 ifa->ifa_netmask)->sin6_addr, 1778 sizeof(struct in6_addr)); 1779 } 1780 n->next = NULL; 1781 n->tail = n; 1782 if (h == NULL) 1783 h = n; 1784 else { 1785 h->tail->next = n; 1786 h->tail = n; 1787 } 1788 } 1789 1790 iftab = h; 1791 freeifaddrs(ifap); 1792} 1793 1794int 1795ifa_exists(const char *ifa_name) 1796{ 1797 struct ipsec_addr_wrap *n; 1798 struct ifgroupreq ifgr; 1799 int s; 1800 1801 if (iftab == NULL) 1802 ifa_load(); 1803 1804 /* check whether this is a group */ 1805 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) 1806 err(1, "ifa_exists: socket"); 1807 bzero(&ifgr, sizeof(ifgr)); 1808 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name)); 1809 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == 0) { 1810 close(s); 1811 return (1); 1812 } 1813 close(s); 1814 1815 for (n = iftab; n; n = n->next) { 1816 if (n->af == AF_LINK && !strncmp(n->name, ifa_name, 1817 IFNAMSIZ)) 1818 return (1); 1819 } 1820 1821 return (0); 1822} 1823 1824struct ipsec_addr_wrap * 1825ifa_grouplookup(const char *ifa_name) 1826{ 1827 struct ifg_req *ifg; 1828 struct ifgroupreq ifgr; 1829 int s; 1830 size_t len; 1831 struct ipsec_addr_wrap *n, *h = NULL, *hn; 1832 1833 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) 1834 err(1, "socket"); 1835 bzero(&ifgr, sizeof(ifgr)); 1836 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name)); 1837 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) { 1838 close(s); 1839 return (NULL); 1840 } 1841 1842 len = ifgr.ifgr_len; 1843 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL) 1844 err(1, "calloc"); 1845 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) 1846 err(1, "ioctl"); 1847 1848 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req); 1849 ifg++) { 1850 len -= sizeof(struct ifg_req); 1851 if ((n = ifa_lookup(ifg->ifgrq_member)) == NULL) 1852 continue; 1853 if (h == NULL) 1854 h = n; 1855 else { 1856 for (hn = h; hn->next != NULL; hn = hn->next) 1857 ; /* nothing */ 1858 hn->next = n; 1859 n->tail = hn; 1860 } 1861 } 1862 free(ifgr.ifgr_groups); 1863 close(s); 1864 1865 return (h); 1866} 1867 1868struct ipsec_addr_wrap * 1869ifa_lookup(const char *ifa_name) 1870{ 1871 struct ipsec_addr_wrap *p = NULL, *h = NULL, *n = NULL; 1872 1873 if (iftab == NULL) 1874 ifa_load(); 1875 1876 if ((n = ifa_grouplookup(ifa_name)) != NULL) 1877 return (n); 1878 1879 for (p = iftab; p; p = p->next) { 1880 if (p->af != AF_INET && p->af != AF_INET6) 1881 continue; 1882 if (strncmp(p->name, ifa_name, IFNAMSIZ)) 1883 continue; 1884 n = calloc(1, sizeof(struct ipsec_addr_wrap)); 1885 if (n == NULL) 1886 err(1, "ifa_lookup: calloc"); 1887 memcpy(n, p, sizeof(struct ipsec_addr_wrap)); 1888 if ((n->name = strdup(p->name)) == NULL) 1889 err(1, "ifa_lookup: strdup"); 1890 switch (n->af) { 1891 case AF_INET: 1892 set_ipmask(n, 32); 1893 break; 1894 case AF_INET6: 1895 /* route/show.c and bgpd/util.c give KAME credit */ 1896 if (IN6_IS_ADDR_LINKLOCAL(&n->address.v6)) { 1897 u_int16_t tmp16; 1898 /* for now we can not handle link local, 1899 * therefore bail for now 1900 */ 1901 free(n); 1902 continue; 1903 1904 memcpy(&tmp16, &n->address.v6.s6_addr[2], 1905 sizeof(tmp16)); 1906 /* use this when we support link-local 1907 * n->??.scopeid = ntohs(tmp16); 1908 */ 1909 n->address.v6.s6_addr[2] = 0; 1910 n->address.v6.s6_addr[3] = 0; 1911 } 1912 set_ipmask(n, 128); 1913 break; 1914 } 1915 1916 n->next = NULL; 1917 n->tail = n; 1918 if (h == NULL) 1919 h = n; 1920 else { 1921 h->tail->next = n; 1922 h->tail = n; 1923 } 1924 } 1925 1926 return (h); 1927} 1928 1929void 1930set_ipmask(struct ipsec_addr_wrap *address, u_int8_t b) 1931{ 1932 struct ipsec_addr *ipa; 1933 int i, j = 0; 1934 1935 ipa = &address->mask; 1936 bzero(ipa, sizeof(struct ipsec_addr)); 1937 1938 while (b >= 32) { 1939 ipa->addr32[j++] = 0xffffffff; 1940 b -= 32; 1941 } 1942 for (i = 31; i > 31 - b; --i) 1943 ipa->addr32[j] |= (1 << i); 1944 if (b) 1945 ipa->addr32[j] = htonl(ipa->addr32[j]); 1946} 1947 1948const struct ipsec_xf * 1949parse_xf(const char *name, const struct ipsec_xf xfs[]) 1950{ 1951 int i; 1952 1953 for (i = 0; xfs[i].name != NULL; i++) { 1954 if (strncmp(name, xfs[i].name, strlen(name))) 1955 continue; 1956 return &xfs[i]; 1957 } 1958 return (NULL); 1959} 1960 1961struct ipsec_life * 1962parse_life(int value) 1963{ 1964 struct ipsec_life *life; 1965 1966 life = calloc(1, sizeof(struct ipsec_life)); 1967 if (life == NULL) 1968 err(1, "calloc"); 1969 1970 life->lifetime = value; 1971 1972 return (life); 1973} 1974 1975struct ipsec_transforms * 1976copytransforms(const struct ipsec_transforms *xfs) 1977{ 1978 struct ipsec_transforms *newxfs; 1979 1980 if (xfs == NULL) 1981 return (NULL); 1982 1983 newxfs = calloc(1, sizeof(struct ipsec_transforms)); 1984 if (newxfs == NULL) 1985 err(1, "copytransforms: calloc"); 1986 1987 memcpy(newxfs, xfs, sizeof(struct ipsec_transforms)); 1988 return (newxfs); 1989} 1990 1991struct ipsec_life * 1992copylife(const struct ipsec_life *life) 1993{ 1994 struct ipsec_life *newlife; 1995 1996 if (life == NULL) 1997 return (NULL); 1998 1999 newlife = calloc(1, sizeof(struct ipsec_life)); 2000 if (newlife == NULL) 2001 err(1, "copylife: calloc"); 2002 2003 memcpy(newlife, life, sizeof(struct ipsec_life)); 2004 return (newlife); 2005} 2006 2007struct ipsec_auth * 2008copyipsecauth(const struct ipsec_auth *auth) 2009{ 2010 struct ipsec_auth *newauth; 2011 2012 if (auth == NULL) 2013 return (NULL); 2014 2015 if ((newauth = calloc(1, sizeof(struct ipsec_auth))) == NULL) 2016 err(1, "calloc"); 2017 if (auth->srcid && 2018 asprintf(&newauth->srcid, "%s", auth->srcid) == -1) 2019 err(1, "asprintf"); 2020 if (auth->dstid && 2021 asprintf(&newauth->dstid, "%s", auth->dstid) == -1) 2022 err(1, "asprintf"); 2023 2024 newauth->srcid_type = auth->srcid_type; 2025 newauth->dstid_type = auth->dstid_type; 2026 newauth->type = auth->type; 2027 2028 return (newauth); 2029} 2030 2031struct ike_auth * 2032copyikeauth(const struct ike_auth *auth) 2033{ 2034 struct ike_auth *newauth; 2035 2036 if (auth == NULL) 2037 return (NULL); 2038 2039 if ((newauth = calloc(1, sizeof(struct ike_auth))) == NULL) 2040 err(1, "calloc"); 2041 if (auth->string && 2042 asprintf(&newauth->string, "%s", auth->string) == -1) 2043 err(1, "asprintf"); 2044 2045 newauth->type = auth->type; 2046 2047 return (newauth); 2048} 2049 2050struct ipsec_key * 2051copykey(struct ipsec_key *key) 2052{ 2053 struct ipsec_key *newkey; 2054 2055 if (key == NULL) 2056 return (NULL); 2057 2058 if ((newkey = calloc(1, sizeof(struct ipsec_key))) == NULL) 2059 err(1, "calloc"); 2060 if ((newkey->data = calloc(key->len, sizeof(u_int8_t))) == NULL) 2061 err(1, "calloc"); 2062 memcpy(newkey->data, key->data, key->len); 2063 newkey->len = key->len; 2064 2065 return (newkey); 2066} 2067 2068struct ipsec_addr_wrap * 2069copyhost(const struct ipsec_addr_wrap *src) 2070{ 2071 struct ipsec_addr_wrap *dst; 2072 2073 if (src == NULL) 2074 return (NULL); 2075 2076 dst = calloc(1, sizeof(struct ipsec_addr_wrap)); 2077 if (dst == NULL) 2078 err(1, "copyhost: calloc"); 2079 2080 memcpy(dst, src, sizeof(struct ipsec_addr_wrap)); 2081 2082 if (src->name != NULL && (dst->name = strdup(src->name)) == NULL) 2083 err(1, "copyhost: strdup"); 2084 2085 return dst; 2086} 2087 2088char * 2089copytag(const char *src) 2090{ 2091 char *tag; 2092 2093 if (src == NULL) 2094 return (NULL); 2095 if ((tag = strdup(src)) == NULL) 2096 err(1, "copytag: strdup"); 2097 2098 return (tag); 2099} 2100 2101struct ipsec_rule * 2102copyrule(struct ipsec_rule *rule) 2103{ 2104 struct ipsec_rule *r; 2105 2106 if ((r = calloc(1, sizeof(struct ipsec_rule))) == NULL) 2107 err(1, "calloc"); 2108 2109 r->src = copyhost(rule->src); 2110 r->dst = copyhost(rule->dst); 2111 r->local = copyhost(rule->local); 2112 r->peer = copyhost(rule->peer); 2113 r->auth = copyipsecauth(rule->auth); 2114 r->ikeauth = copyikeauth(rule->ikeauth); 2115 r->xfs = copytransforms(rule->xfs); 2116 r->p1xfs = copytransforms(rule->p1xfs); 2117 r->p2xfs = copytransforms(rule->p2xfs); 2118 r->p1life = copylife(rule->p1life); 2119 r->p2life = copylife(rule->p2life); 2120 r->authkey = copykey(rule->authkey); 2121 r->enckey = copykey(rule->enckey); 2122 r->tag = copytag(rule->tag); 2123 2124 r->p1ie = rule->p1ie; 2125 r->p2ie = rule->p2ie; 2126 r->type = rule->type; 2127 r->satype = rule->satype; 2128 r->proto = rule->proto; 2129 r->tmode = rule->tmode; 2130 r->direction = rule->direction; 2131 r->flowtype = rule->flowtype; 2132 r->sport = rule->sport; 2133 r->dport = rule->dport; 2134 r->ikemode = rule->ikemode; 2135 r->spi = rule->spi; 2136 r->nr = rule->nr; 2137 2138 return (r); 2139} 2140 2141int 2142validate_af(struct ipsec_addr_wrap *src, struct ipsec_addr_wrap *dst) 2143{ 2144 struct ipsec_addr_wrap *ta; 2145 u_int8_t src_v4 = 0; 2146 u_int8_t dst_v4 = 0; 2147 u_int8_t src_v6 = 0; 2148 u_int8_t dst_v6 = 0; 2149 2150 for (ta = src; ta; ta = ta->next) { 2151 if (ta->af == AF_INET) 2152 src_v4 = 1; 2153 if (ta->af == AF_INET6) 2154 src_v6 = 1; 2155 if (ta->af == AF_UNSPEC) 2156 return 0; 2157 if (src_v4 && src_v6) 2158 break; 2159 } 2160 for (ta = dst; ta; ta = ta->next) { 2161 if (ta->af == AF_INET) 2162 dst_v4 = 1; 2163 if (ta->af == AF_INET6) 2164 dst_v6 = 1; 2165 if (ta->af == AF_UNSPEC) 2166 return 0; 2167 if (dst_v4 && dst_v6) 2168 break; 2169 } 2170 if (src_v4 != dst_v4 && src_v6 != dst_v6) 2171 return (1); 2172 2173 return (0); 2174} 2175 2176 2177int 2178validate_sa(u_int32_t spi, u_int8_t satype, struct ipsec_transforms *xfs, 2179 struct ipsec_key *authkey, struct ipsec_key *enckey, u_int8_t tmode) 2180{ 2181 /* Sanity checks */ 2182 if (spi == 0) { 2183 yyerror("no SPI specified"); 2184 return (0); 2185 } 2186 if (satype == IPSEC_AH) { 2187 if (!xfs) { 2188 yyerror("no transforms specified"); 2189 return (0); 2190 } 2191 if (!xfs->authxf) 2192 xfs->authxf = &authxfs[AUTHXF_HMAC_SHA2_256]; 2193 if (xfs->encxf) { 2194 yyerror("ah does not provide encryption"); 2195 return (0); 2196 } 2197 if (xfs->compxf) { 2198 yyerror("ah does not provide compression"); 2199 return (0); 2200 } 2201 } 2202 if (satype == IPSEC_ESP) { 2203 if (!xfs) { 2204 yyerror("no transforms specified"); 2205 return (0); 2206 } 2207 if (xfs->compxf) { 2208 yyerror("esp does not provide compression"); 2209 return (0); 2210 } 2211 if (!xfs->authxf) 2212 xfs->authxf = &authxfs[AUTHXF_HMAC_SHA2_256]; 2213 if (!xfs->encxf) 2214 xfs->encxf = &encxfs[ENCXF_AES]; 2215 } 2216 if (satype == IPSEC_IPCOMP) { 2217 if (!xfs) { 2218 yyerror("no transform specified"); 2219 return (0); 2220 } 2221 if (xfs->authxf || xfs->encxf) { 2222 yyerror("no encryption or authentication with ipcomp"); 2223 return (0); 2224 } 2225 if (!xfs->compxf) 2226 xfs->compxf = &compxfs[COMPXF_DEFLATE]; 2227 } 2228 if (satype == IPSEC_IPIP) { 2229 if (!xfs) { 2230 yyerror("no transform specified"); 2231 return (0); 2232 } 2233 if (xfs->authxf || xfs->encxf || xfs->compxf) { 2234 yyerror("no encryption, authentication or compression" 2235 " with ipip"); 2236 return (0); 2237 } 2238 } 2239 if (satype == IPSEC_TCPMD5 && authkey == NULL && tmode != 2240 IPSEC_TRANSPORT) { 2241 yyerror("authentication key needed for tcpmd5"); 2242 return (0); 2243 } 2244 if (xfs && xfs->authxf) { 2245 if (!authkey && xfs->authxf != &authxfs[AUTHXF_NONE]) { 2246 yyerror("no authentication key specified"); 2247 return (0); 2248 } 2249 if (authkey && authkey->len != xfs->authxf->keymin) { 2250 yyerror("wrong authentication key length, needs to be " 2251 "%d bits", xfs->authxf->keymin * 8); 2252 return (0); 2253 } 2254 } 2255 if (xfs && xfs->encxf) { 2256 if (!enckey && xfs->encxf != &encxfs[ENCXF_NULL]) { 2257 yyerror("no encryption key specified"); 2258 return (0); 2259 } 2260 if (enckey) { 2261 if (enckey->len < xfs->encxf->keymin) { 2262 yyerror("encryption key too short (%d bits), " 2263 "minimum %d bits", enckey->len * 8, 2264 xfs->encxf->keymin * 8); 2265 return (0); 2266 } 2267 if (xfs->encxf->keymax < enckey->len) { 2268 yyerror("encryption key too long (%d bits), " 2269 "maximum %d bits", enckey->len * 8, 2270 xfs->encxf->keymax * 8); 2271 return (0); 2272 } 2273 } 2274 } 2275 2276 return 1; 2277} 2278 2279int 2280add_sagroup(struct ipsec_rule *r) 2281{ 2282 struct ipsec_rule *rp, *last, *group; 2283 int found = 0; 2284 2285 TAILQ_FOREACH(rp, &ipsec->group_queue, group_entry) { 2286 if ((strcmp(rp->src->name, r->src->name) == 0) && 2287 (strcmp(rp->dst->name, r->dst->name) == 0)) { 2288 found = 1; 2289 break; 2290 } 2291 } 2292 if (found) { 2293 last = TAILQ_LAST(&rp->dst_group_queue, dst_group_queue); 2294 TAILQ_INSERT_TAIL(&rp->dst_group_queue, r, dst_group_entry); 2295 2296 group = create_sagroup(last->dst, last->satype, last->spi, 2297 r->dst, r->satype, r->spi); 2298 if (group == NULL) 2299 return (1); 2300 group->nr = ipsec->rule_nr++; 2301 if (ipsecctl_add_rule(ipsec, group)) 2302 return (1); 2303 } else { 2304 TAILQ_INSERT_TAIL(&ipsec->group_queue, r, group_entry); 2305 TAILQ_INIT(&r->dst_group_queue); 2306 TAILQ_INSERT_TAIL(&r->dst_group_queue, r, dst_group_entry); 2307 } 2308 2309 return (0); 2310} 2311 2312struct ipsec_rule * 2313create_sa(u_int8_t satype, u_int8_t tmode, struct ipsec_hosts *hosts, 2314 u_int32_t spi, struct ipsec_transforms *xfs, struct ipsec_key *authkey, 2315 struct ipsec_key *enckey) 2316{ 2317 struct ipsec_rule *r; 2318 2319 if (validate_sa(spi, satype, xfs, authkey, enckey, tmode) == 0) 2320 return (NULL); 2321 2322 r = calloc(1, sizeof(struct ipsec_rule)); 2323 if (r == NULL) 2324 err(1, "create_sa: calloc"); 2325 2326 r->type |= RULE_SA; 2327 r->satype = satype; 2328 r->tmode = tmode; 2329 r->src = hosts->src; 2330 r->dst = hosts->dst; 2331 r->spi = spi; 2332 r->xfs = xfs; 2333 r->authkey = authkey; 2334 r->enckey = enckey; 2335 2336 return r; 2337} 2338 2339struct ipsec_rule * 2340reverse_sa(struct ipsec_rule *rule, u_int32_t spi, struct ipsec_key *authkey, 2341 struct ipsec_key *enckey) 2342{ 2343 struct ipsec_rule *reverse; 2344 2345 if (validate_sa(spi, rule->satype, rule->xfs, authkey, enckey, 2346 rule->tmode) == 0) 2347 return (NULL); 2348 2349 reverse = calloc(1, sizeof(struct ipsec_rule)); 2350 if (reverse == NULL) 2351 err(1, "reverse_sa: calloc"); 2352 2353 reverse->type |= RULE_SA; 2354 reverse->satype = rule->satype; 2355 reverse->tmode = rule->tmode; 2356 reverse->src = copyhost(rule->dst); 2357 reverse->dst = copyhost(rule->src); 2358 reverse->spi = spi; 2359 reverse->xfs = copytransforms(rule->xfs); 2360 reverse->authkey = authkey; 2361 reverse->enckey = enckey; 2362 2363 return (reverse); 2364} 2365 2366struct ipsec_rule * 2367create_sagroup(struct ipsec_addr_wrap *dst, u_int8_t proto, u_int32_t spi, 2368 struct ipsec_addr_wrap *dst2, u_int8_t proto2, u_int32_t spi2) 2369{ 2370 struct ipsec_rule *r; 2371 2372 r = calloc(1, sizeof(struct ipsec_rule)); 2373 if (r == NULL) 2374 err(1, "create_sagroup: calloc"); 2375 2376 r->type |= RULE_GROUP; 2377 2378 r->dst = copyhost(dst); 2379 r->dst2 = copyhost(dst2); 2380 r->proto = proto; 2381 r->proto2 = proto2; 2382 r->spi = spi; 2383 r->spi2 = spi2; 2384 r->satype = proto; 2385 2386 return (r); 2387} 2388 2389struct ipsec_rule * 2390create_flow(u_int8_t dir, u_int8_t proto, struct ipsec_hosts *hosts, 2391 u_int8_t satype, char *srcid, char *dstid, u_int8_t type) 2392{ 2393 struct ipsec_rule *r; 2394 2395 r = calloc(1, sizeof(struct ipsec_rule)); 2396 if (r == NULL) 2397 err(1, "create_flow: calloc"); 2398 2399 r->type |= RULE_FLOW; 2400 2401 if (dir == IPSEC_INOUT) 2402 r->direction = IPSEC_OUT; 2403 else 2404 r->direction = dir; 2405 2406 r->satype = satype; 2407 r->proto = proto; 2408 r->src = hosts->src; 2409 r->sport = hosts->sport; 2410 r->dst = hosts->dst; 2411 r->dport = hosts->dport; 2412 if ((hosts->sport != 0 || hosts->dport != 0) && 2413 (proto != IPPROTO_TCP && proto != IPPROTO_UDP)) { 2414 yyerror("no protocol supplied with source/destination ports"); 2415 goto errout; 2416 } 2417 2418 r->flowtype = type; 2419 if (type == TYPE_DENY || type == TYPE_BYPASS) 2420 return (r); 2421 2422 r->auth = calloc(1, sizeof(struct ipsec_auth)); 2423 if (r->auth == NULL) 2424 err(1, "create_flow: calloc"); 2425 r->auth->srcid = srcid; 2426 r->auth->dstid = dstid; 2427 r->auth->srcid_type = get_id_type(srcid); 2428 r->auth->dstid_type = get_id_type(dstid); 2429 return r; 2430 2431errout: 2432 free(r); 2433 if (srcid) 2434 free(srcid); 2435 if (dstid) 2436 free(dstid); 2437 free(hosts->src); 2438 hosts->src = NULL; 2439 free(hosts->dst); 2440 hosts->dst = NULL; 2441 2442 return NULL; 2443} 2444 2445void 2446expand_any(struct ipsec_addr_wrap *ipa_in) 2447{ 2448 struct ipsec_addr_wrap *oldnext, *ipa; 2449 2450 for (ipa = ipa_in; ipa; ipa = ipa->next) { 2451 if (ipa->af != AF_UNSPEC) 2452 continue; 2453 oldnext = ipa->next; 2454 2455 ipa->af = AF_INET; 2456 ipa->netaddress = 1; 2457 if ((ipa->name = strdup("0.0.0.0/0")) == NULL) 2458 err(1, "expand_any: strdup"); 2459 2460 ipa->next = calloc(1, sizeof(struct ipsec_addr_wrap)); 2461 if (ipa->next == NULL) 2462 err(1, "expand_any: calloc"); 2463 ipa->next->af = AF_INET6; 2464 ipa->next->netaddress = 1; 2465 if ((ipa->next->name = strdup("::/0")) == NULL) 2466 err(1, "expand_any: strdup"); 2467 2468 ipa->next->next = oldnext; 2469 } 2470} 2471 2472int 2473set_rule_peers(struct ipsec_rule *r, struct ipsec_hosts *peers) 2474{ 2475 if (r->type == RULE_FLOW && 2476 (r->flowtype == TYPE_DENY || r->flowtype == TYPE_BYPASS)) 2477 return (0); 2478 2479 r->local = copyhost(peers->src); 2480 r->peer = copyhost(peers->dst); 2481 if (r->peer == NULL) { 2482 /* Set peer to remote host. Must be a host address. */ 2483 if (r->direction == IPSEC_IN) { 2484 if (!r->src->netaddress) 2485 r->peer = copyhost(r->src); 2486 } else { 2487 if (!r->dst->netaddress) 2488 r->peer = copyhost(r->dst); 2489 } 2490 } 2491 if (r->type == RULE_FLOW && r->peer == NULL) { 2492 yyerror("no peer specified for destination %s", 2493 r->dst->name); 2494 return (1); 2495 } 2496 if (r->peer != NULL && r->peer->af == AF_UNSPEC) { 2497 /* If peer has been specified as any, use the default peer. */ 2498 free(r->peer); 2499 r->peer = NULL; 2500 } 2501 if (r->type == RULE_IKE && r->peer == NULL) { 2502 /* 2503 * Check if the default peer is consistent for all 2504 * rules. Only warn to avoid breaking existing configs. 2505 */ 2506 static struct ipsec_rule *pdr = NULL; 2507 2508 if (pdr == NULL) { 2509 /* Remember first default peer rule for comparison. */ 2510 pdr = r; 2511 } else { 2512 /* The new default peer must create the same config. */ 2513 if ((pdr->local == NULL && r->local != NULL) || 2514 (pdr->local != NULL && r->local == NULL) || 2515 (pdr->local != NULL && r->local != NULL && 2516 strcmp(pdr->local->name, r->local->name))) 2517 yywarn("default peer local mismatch"); 2518 if (pdr->ikeauth->type != r->ikeauth->type) 2519 yywarn("default peer phase 1 auth mismatch"); 2520 if (pdr->ikeauth->type == IKE_AUTH_PSK && 2521 r->ikeauth->type == IKE_AUTH_PSK && 2522 strcmp(pdr->ikeauth->string, r->ikeauth->string)) 2523 yywarn("default peer psk mismatch"); 2524 if (pdr->p1ie != r->p1ie) 2525 yywarn("default peer phase 1 mode mismatch"); 2526 /* 2527 * Transforms have ADD insted of SET so they may be 2528 * different and are not checked here. 2529 */ 2530 if ((pdr->auth->srcid == NULL && 2531 r->auth->srcid != NULL) || 2532 (pdr->auth->srcid != NULL && 2533 r->auth->srcid == NULL) || 2534 (pdr->auth->srcid != NULL && 2535 r->auth->srcid != NULL && 2536 strcmp(pdr->auth->srcid, r->auth->srcid))) 2537 yywarn("default peer srcid mismatch"); 2538 if ((pdr->auth->dstid == NULL && 2539 r->auth->dstid != NULL) || 2540 (pdr->auth->dstid != NULL && 2541 r->auth->dstid == NULL) || 2542 (pdr->auth->dstid != NULL && 2543 r->auth->dstid != NULL && 2544 strcmp(pdr->auth->dstid, r->auth->dstid))) 2545 yywarn("default peer dstid mismatch"); 2546 } 2547 } 2548 return (0); 2549} 2550 2551int 2552expand_rule(struct ipsec_rule *rule, struct ipsec_hosts *peers, 2553 u_int8_t direction, u_int32_t spi, struct ipsec_key *authkey, 2554 struct ipsec_key *enckey, int group) 2555{ 2556 struct ipsec_rule *r, *revr; 2557 struct ipsec_addr_wrap *src, *dst; 2558 int added = 0, ret = 1; 2559 2560 if (validate_af(rule->src, rule->dst)) { 2561 yyerror("source/destination address families do not match"); 2562 goto errout; 2563 } 2564 expand_any(rule->src); 2565 expand_any(rule->dst); 2566 for (src = rule->src; src; src = src->next) { 2567 for (dst = rule->dst; dst; dst = dst->next) { 2568 if (src->af != dst->af) 2569 continue; 2570 r = copyrule(rule); 2571 2572 r->src = copyhost(src); 2573 r->dst = copyhost(dst); 2574 2575 if (peers && set_rule_peers(r, peers)) { 2576 ipsecctl_free_rule(r); 2577 goto errout; 2578 } 2579 2580 r->nr = ipsec->rule_nr++; 2581 if (ipsecctl_add_rule(ipsec, r)) 2582 goto out; 2583 if (group && add_sagroup(r)) 2584 goto out; 2585 2586 if (direction == IPSEC_INOUT) { 2587 /* Create and add reverse flow rule. */ 2588 revr = reverse_rule(r); 2589 if (revr == NULL) 2590 goto out; 2591 2592 revr->nr = ipsec->rule_nr++; 2593 if (ipsecctl_add_rule(ipsec, revr)) 2594 goto out; 2595 if (group && add_sagroup(revr)) 2596 goto out; 2597 } else if (spi != 0 || authkey || enckey) { 2598 /* Create and add reverse sa rule. */ 2599 revr = reverse_sa(r, spi, authkey, enckey); 2600 if (revr == NULL) 2601 goto out; 2602 2603 revr->nr = ipsec->rule_nr++; 2604 if (ipsecctl_add_rule(ipsec, revr)) 2605 goto out; 2606 if (group && add_sagroup(revr)) 2607 goto out; 2608 } 2609 added++; 2610 } 2611 } 2612 if (!added) 2613 yyerror("rule expands to no valid combination"); 2614 errout: 2615 ret = 0; 2616 ipsecctl_free_rule(rule); 2617 out: 2618 if (peers) { 2619 if (peers->src) 2620 free(peers->src); 2621 if (peers->dst) 2622 free(peers->dst); 2623 } 2624 return (ret); 2625} 2626 2627struct ipsec_rule * 2628reverse_rule(struct ipsec_rule *rule) 2629{ 2630 struct ipsec_rule *reverse; 2631 2632 reverse = calloc(1, sizeof(struct ipsec_rule)); 2633 if (reverse == NULL) 2634 err(1, "reverse_rule: calloc"); 2635 2636 reverse->type |= RULE_FLOW; 2637 2638 /* Reverse direction */ 2639 if (rule->direction == (u_int8_t)IPSEC_OUT) 2640 reverse->direction = (u_int8_t)IPSEC_IN; 2641 else 2642 reverse->direction = (u_int8_t)IPSEC_OUT; 2643 2644 reverse->flowtype = rule->flowtype; 2645 reverse->src = copyhost(rule->dst); 2646 reverse->dst = copyhost(rule->src); 2647 reverse->sport = rule->dport; 2648 reverse->dport = rule->sport; 2649 if (rule->local) 2650 reverse->local = copyhost(rule->local); 2651 if (rule->peer) 2652 reverse->peer = copyhost(rule->peer); 2653 reverse->satype = rule->satype; 2654 reverse->proto = rule->proto; 2655 2656 if (rule->auth) { 2657 reverse->auth = calloc(1, sizeof(struct ipsec_auth)); 2658 if (reverse->auth == NULL) 2659 err(1, "reverse_rule: calloc"); 2660 if (rule->auth->dstid && (reverse->auth->dstid = 2661 strdup(rule->auth->dstid)) == NULL) 2662 err(1, "reverse_rule: strdup"); 2663 if (rule->auth->srcid && (reverse->auth->srcid = 2664 strdup(rule->auth->srcid)) == NULL) 2665 err(1, "reverse_rule: strdup"); 2666 reverse->auth->srcid_type = rule->auth->srcid_type; 2667 reverse->auth->dstid_type = rule->auth->dstid_type; 2668 reverse->auth->type = rule->auth->type; 2669 } 2670 2671 return reverse; 2672} 2673 2674struct ipsec_rule * 2675create_ike(u_int8_t proto, struct ipsec_hosts *hosts, 2676 struct ike_mode *phase1mode, struct ike_mode *phase2mode, u_int8_t satype, 2677 u_int8_t tmode, u_int8_t mode, char *srcid, char *dstid, 2678 struct ike_auth *authtype, char *tag) 2679{ 2680 struct ipsec_rule *r; 2681 2682 r = calloc(1, sizeof(struct ipsec_rule)); 2683 if (r == NULL) 2684 err(1, "create_ike: calloc"); 2685 2686 r->type = RULE_IKE; 2687 2688 r->proto = proto; 2689 r->src = hosts->src; 2690 r->sport = hosts->sport; 2691 r->dst = hosts->dst; 2692 r->dport = hosts->dport; 2693 if ((hosts->sport != 0 || hosts->dport != 0) && 2694 (proto != IPPROTO_TCP && proto != IPPROTO_UDP)) { 2695 yyerror("no protocol supplied with source/destination ports"); 2696 free(r); 2697 free(hosts->src); 2698 hosts->src = NULL; 2699 free(hosts->dst); 2700 hosts->dst = NULL; 2701 if (phase1mode) { 2702 free(phase1mode->xfs); 2703 phase1mode->xfs = NULL; 2704 free(phase1mode->life); 2705 phase1mode->life = NULL; 2706 } 2707 if (phase2mode) { 2708 free(phase2mode->xfs); 2709 phase2mode->xfs = NULL; 2710 free(phase2mode->life); 2711 phase2mode->life = NULL; 2712 } 2713 if (srcid) 2714 free(srcid); 2715 if (dstid) 2716 free(dstid); 2717 return NULL; 2718 } 2719 2720 r->satype = satype; 2721 r->tmode = tmode; 2722 r->ikemode = mode; 2723 if (phase1mode) { 2724 r->p1xfs = phase1mode->xfs; 2725 r->p1life = phase1mode->life; 2726 r->p1ie = phase1mode->ike_exch; 2727 } else { 2728 r->p1ie = IKE_MM; 2729 } 2730 if (phase2mode) { 2731 r->p2xfs = phase2mode->xfs; 2732 r->p2life = phase2mode->life; 2733 r->p2ie = phase2mode->ike_exch; 2734 } else { 2735 r->p2ie = IKE_QM; 2736 } 2737 2738 r->auth = calloc(1, sizeof(struct ipsec_auth)); 2739 if (r->auth == NULL) 2740 err(1, "create_ike: calloc"); 2741 r->auth->srcid = srcid; 2742 r->auth->dstid = dstid; 2743 r->auth->srcid_type = get_id_type(srcid); 2744 r->auth->dstid_type = get_id_type(dstid); 2745 r->ikeauth = calloc(1, sizeof(struct ike_auth)); 2746 if (r->ikeauth == NULL) 2747 err(1, "create_ike: calloc"); 2748 r->ikeauth->type = authtype->type; 2749 r->ikeauth->string = authtype->string; 2750 r->tag = tag; 2751 2752 return (r); 2753} 2754