parse.y revision 1.138
1/* $OpenBSD: parse.y,v 1.138 2008/07/01 14:31:37 bluhm 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 kw_cmp(const void *, const void *); 65int lookup(char *); 66int lgetc(int); 67int lungetc(int); 68int findeol(void); 69 70TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead); 71struct sym { 72 TAILQ_ENTRY(sym) entry; 73 int used; 74 int persist; 75 char *nam; 76 char *val; 77}; 78int symset(const char *, const char *, int); 79char *symget(const char *); 80int cmdline_symset(char *); 81 82#define KEYSIZE_LIMIT 1024 83 84static struct ipsecctl *ipsec = NULL; 85static int debug = 0; 86 87const struct ipsec_xf authxfs[] = { 88 { "unknown", AUTHXF_UNKNOWN, 0, 0 }, 89 { "none", AUTHXF_NONE, 0, 0 }, 90 { "hmac-md5", AUTHXF_HMAC_MD5, 16, 0 }, 91 { "hmac-ripemd160", AUTHXF_HMAC_RIPEMD160, 20, 0 }, 92 { "hmac-sha1", AUTHXF_HMAC_SHA1, 20, 0 }, 93 { "hmac-sha2-256", AUTHXF_HMAC_SHA2_256, 32, 0 }, 94 { "hmac-sha2-384", AUTHXF_HMAC_SHA2_384, 48, 0 }, 95 { "hmac-sha2-512", AUTHXF_HMAC_SHA2_512, 64, 0 }, 96 { NULL, 0, 0, 0 }, 97}; 98 99const struct ipsec_xf encxfs[] = { 100 { "unknown", ENCXF_UNKNOWN, 0, 0 }, 101 { "none", ENCXF_NONE, 0, 0 }, 102 { "3des-cbc", ENCXF_3DES_CBC, 24, 24 }, 103 { "des-cbc", ENCXF_DES_CBC, 8, 8 }, 104 { "aes", ENCXF_AES, 16, 32 }, 105 { "aes-128", ENCXF_AES_128, 16, 16 }, 106 { "aes-192", ENCXF_AES_192, 24, 24 }, 107 { "aes-256", ENCXF_AES_256, 32, 32 }, 108 { "aesctr", ENCXF_AESCTR, 16+4, 32+4 }, 109 { "blowfish", ENCXF_BLOWFISH, 5, 56 }, 110 { "cast128", ENCXF_CAST128, 5, 16 }, 111 { "null", ENCXF_NULL, 0, 0 }, 112 { "skipjack", ENCXF_SKIPJACK, 10, 10 }, 113 { NULL, 0, 0, 0 }, 114}; 115 116const struct ipsec_xf compxfs[] = { 117 { "unknown", COMPXF_UNKNOWN, 0, 0 }, 118 { "deflate", COMPXF_DEFLATE, 0, 0 }, 119 { "lzs", COMPXF_LZS, 0, 0 }, 120 { NULL, 0, 0, 0 }, 121}; 122 123const struct ipsec_xf groupxfs[] = { 124 { "unknown", GROUPXF_UNKNOWN, 0, 0 }, 125 { "none", GROUPXF_NONE, 0, 0 }, 126 { "modp768", GROUPXF_768, 768, 0 }, 127 { "grp1", GROUPXF_768, 768, 0 }, 128 { "modp1024", GROUPXF_1024, 1024, 0 }, 129 { "grp2", GROUPXF_1024, 1024, 0 }, 130 { "modp1536", GROUPXF_1536, 1536, 0 }, 131 { "grp5", GROUPXF_1536, 1536, 0 }, 132 { "modp2048", GROUPXF_2048, 2048, 0 }, 133 { "grp14", GROUPXF_2048, 2048, 0 }, 134 { "modp3072", GROUPXF_3072, 3072, 0 }, 135 { "grp15", GROUPXF_3072, 3072, 0 }, 136 { "modp4096", GROUPXF_4096, 4096, 0 }, 137 { "grp16", GROUPXF_4096, 4096, 0 }, 138 { "modp6144", GROUPXF_6144, 6144, 0 }, 139 { "grp17", GROUPXF_6144, 6144, 0 }, 140 { "modp8192", GROUPXF_8192, 8192, 0 }, 141 { "grp18", GROUPXF_8192, 8192, 0 }, 142 { NULL, 0, 0, 0 }, 143}; 144 145int atoul(char *, u_long *); 146int atospi(char *, u_int32_t *); 147u_int8_t x2i(unsigned char *); 148struct ipsec_key *parsekey(unsigned char *, size_t); 149struct ipsec_key *parsekeyfile(char *); 150struct ipsec_addr_wrap *host(const char *); 151struct ipsec_addr_wrap *host_v6(const char *, int); 152struct ipsec_addr_wrap *host_v4(const char *, int); 153struct ipsec_addr_wrap *host_dns(const char *, int); 154struct ipsec_addr_wrap *host_if(const char *, int); 155void ifa_load(void); 156int ifa_exists(const char *); 157struct ipsec_addr_wrap *ifa_lookup(const char *ifa_name); 158struct ipsec_addr_wrap *ifa_grouplookup(const char *); 159void set_ipmask(struct ipsec_addr_wrap *, u_int8_t); 160const struct ipsec_xf *parse_xf(const char *, const struct ipsec_xf *); 161struct ipsec_life *parse_life(int); 162struct ipsec_transforms *copytransforms(const struct ipsec_transforms *); 163struct ipsec_life *copylife(const struct ipsec_life *); 164struct ipsec_auth *copyipsecauth(const struct ipsec_auth *); 165struct ike_auth *copyikeauth(const struct ike_auth *); 166struct ipsec_key *copykey(struct ipsec_key *); 167struct ipsec_addr_wrap *copyhost(const struct ipsec_addr_wrap *); 168char *copytag(const char *); 169struct ipsec_rule *copyrule(struct ipsec_rule *); 170int validate_af(struct ipsec_addr_wrap *, 171 struct ipsec_addr_wrap *); 172int validate_sa(u_int32_t, u_int8_t, 173 struct ipsec_transforms *, struct ipsec_key *, 174 struct ipsec_key *, u_int8_t); 175struct ipsec_rule *create_sa(u_int8_t, u_int8_t, struct ipsec_hosts *, 176 u_int32_t, struct ipsec_transforms *, 177 struct ipsec_key *, struct ipsec_key *); 178struct ipsec_rule *reverse_sa(struct ipsec_rule *, u_int32_t, 179 struct ipsec_key *, struct ipsec_key *); 180struct ipsec_rule *create_sagroup(struct ipsec_addr_wrap *, u_int8_t, 181 u_int32_t, struct ipsec_addr_wrap *, u_int8_t, 182 u_int32_t); 183struct ipsec_rule *create_flow(u_int8_t, u_int8_t, struct ipsec_hosts *, 184 u_int8_t, char *, char *, u_int8_t); 185int set_rule_peers(struct ipsec_rule *r, 186 struct ipsec_hosts *peers); 187void expand_any(struct ipsec_addr_wrap *); 188int expand_rule(struct ipsec_rule *, struct ipsec_hosts *, 189 u_int8_t, u_int32_t, struct ipsec_key *, 190 struct ipsec_key *, int); 191struct ipsec_rule *reverse_rule(struct ipsec_rule *); 192struct ipsec_rule *create_ike(u_int8_t, struct ipsec_hosts *, 193 struct ike_mode *, struct ike_mode *, u_int8_t, 194 u_int8_t, u_int8_t, char *, char *, 195 struct ike_auth *, char *); 196int add_sagroup(struct ipsec_rule *); 197int get_id_type(char *); 198 199struct ipsec_transforms *ipsec_transforms; 200 201typedef struct { 202 union { 203 int64_t number; 204 u_int8_t ikemode; 205 u_int8_t dir; 206 u_int8_t satype; /* encapsulating prococol */ 207 u_int8_t proto; /* encapsulated protocol */ 208 u_int8_t tmode; 209 char *string; 210 u_int16_t port; 211 struct ipsec_hosts hosts; 212 struct ipsec_hosts peers; 213 struct ipsec_addr_wrap *singlehost; 214 struct ipsec_addr_wrap *host; 215 struct { 216 char *srcid; 217 char *dstid; 218 } ids; 219 char *id; 220 u_int8_t type; 221 struct ike_auth ikeauth; 222 struct { 223 u_int32_t spiout; 224 u_int32_t spiin; 225 } spis; 226 struct { 227 struct ipsec_key *keyout; 228 struct ipsec_key *keyin; 229 } authkeys; 230 struct { 231 struct ipsec_key *keyout; 232 struct ipsec_key *keyin; 233 } enckeys; 234 struct { 235 struct ipsec_key *keyout; 236 struct ipsec_key *keyin; 237 } keys; 238 struct ipsec_transforms *transforms; 239 struct ipsec_life *life; 240 struct ike_mode *mode; 241 } v; 242 int lineno; 243} YYSTYPE; 244 245%} 246 247%token FLOW FROM ESP AH IN PEER ON OUT TO SRCID DSTID RSA PSK TCPMD5 SPI 248%token AUTHKEY ENCKEY FILENAME AUTHXF ENCXF ERROR IKE MAIN QUICK AGGRESSIVE 249%token PASSIVE ACTIVE ANY IPIP IPCOMP COMPXF TUNNEL TRANSPORT DYNAMIC LIFE 250%token TYPE DENY BYPASS LOCAL PROTO USE ACQUIRE REQUIRE DONTACQ GROUP PORT TAG 251%token INCLUDE 252%token <v.string> STRING 253%token <v.number> NUMBER 254%type <v.string> string 255%type <v.dir> dir 256%type <v.satype> satype 257%type <v.proto> proto 258%type <v.number> protoval 259%type <v.tmode> tmode 260%type <v.hosts> hosts 261%type <v.port> port 262%type <v.number> portval 263%type <v.peers> peers 264%type <v.singlehost> singlehost 265%type <v.host> host host_list 266%type <v.ids> ids 267%type <v.id> id 268%type <v.spis> spispec 269%type <v.authkeys> authkeyspec 270%type <v.enckeys> enckeyspec 271%type <v.keys> keyspec 272%type <v.transforms> transforms 273%type <v.ikemode> ikemode 274%type <v.ikeauth> ikeauth 275%type <v.type> type 276%type <v.life> life 277%type <v.mode> phase1mode phase2mode 278%type <v.string> tag 279%% 280 281grammar : /* empty */ 282 | grammar include '\n' 283 | grammar '\n' 284 | grammar ikerule '\n' 285 | grammar flowrule '\n' 286 | grammar sarule '\n' 287 | grammar tcpmd5rule '\n' 288 | grammar varset '\n' 289 | grammar error '\n' { file->errors++; } 290 ; 291 292comma : ',' 293 | /* empty */ 294 ; 295 296include : INCLUDE STRING { 297 struct file *nfile; 298 299 if ((nfile = pushfile($2, 0)) == NULL) { 300 yyerror("failed to include file %s", $2); 301 free($2); 302 YYERROR; 303 } 304 free($2); 305 306 file = nfile; 307 lungetc('\n'); 308 } 309 ; 310 311tcpmd5rule : TCPMD5 hosts spispec authkeyspec { 312 struct ipsec_rule *r; 313 314 r = create_sa(IPSEC_TCPMD5, IPSEC_TRANSPORT, &$2, 315 $3.spiout, NULL, $4.keyout, NULL); 316 if (r == NULL) 317 YYERROR; 318 319 if (expand_rule(r, NULL, 0, $3.spiin, $4.keyin, NULL, 320 0)) 321 errx(1, "tcpmd5rule: expand_rule"); 322 } 323 ; 324 325sarule : satype tmode hosts spispec transforms authkeyspec 326 enckeyspec { 327 struct ipsec_rule *r; 328 329 r = create_sa($1, $2, &$3, $4.spiout, $5, $6.keyout, 330 $7.keyout); 331 if (r == NULL) 332 YYERROR; 333 334 if (expand_rule(r, NULL, 0, $4.spiin, $6.keyin, 335 $7.keyin, 1)) 336 errx(1, "sarule: expand_rule"); 337 } 338 ; 339 340flowrule : FLOW satype dir proto hosts peers ids type { 341 struct ipsec_rule *r; 342 343 r = create_flow($3, $4, &$5, $2, $7.srcid, 344 $7.dstid, $8); 345 if (r == NULL) 346 YYERROR; 347 348 if (expand_rule(r, &$6, $3, 0, NULL, NULL, 0)) 349 errx(1, "flowrule: expand_rule"); 350 } 351 ; 352 353ikerule : IKE ikemode satype tmode proto hosts peers 354 phase1mode phase2mode ids ikeauth tag { 355 struct ipsec_rule *r; 356 357 r = create_ike($5, &$6, $8, $9, $3, $4, $2, 358 $10.srcid, $10.dstid, &$11, $12); 359 if (r == NULL) 360 YYERROR; 361 362 if (expand_rule(r, &$7, 0, 0, NULL, NULL, 0)) 363 errx(1, "ikerule: expand_rule"); 364 } 365 ; 366 367satype : /* empty */ { $$ = IPSEC_ESP; } 368 | ESP { $$ = IPSEC_ESP; } 369 | AH { $$ = IPSEC_AH; } 370 | IPCOMP { $$ = IPSEC_IPCOMP; } 371 | IPIP { $$ = IPSEC_IPIP; } 372 ; 373 374proto : /* empty */ { $$ = 0; } 375 | PROTO protoval { $$ = $2; } 376 | PROTO ESP { $$ = IPPROTO_ESP; } 377 | PROTO AH { $$ = IPPROTO_AH; } 378 ; 379 380protoval : STRING { 381 struct protoent *p; 382 383 p = getprotobyname($1); 384 if (p == NULL) { 385 yyerror("unknown protocol: %s", $1); 386 YYERROR; 387 } 388 $$ = p->p_proto; 389 free($1); 390 } 391 | NUMBER { 392 if ($1 > 255 || $1 < 0) { 393 yyerror("protocol outside range"); 394 YYERROR; 395 } 396 } 397 ; 398 399tmode : /* empty */ { $$ = IPSEC_TUNNEL; } 400 | TUNNEL { $$ = IPSEC_TUNNEL; } 401 | TRANSPORT { $$ = IPSEC_TRANSPORT; } 402 ; 403 404dir : /* empty */ { $$ = IPSEC_INOUT; } 405 | IN { $$ = IPSEC_IN; } 406 | OUT { $$ = IPSEC_OUT; } 407 ; 408 409hosts : FROM host port TO host port { 410 $$.src = $2; 411 $$.sport = $3; 412 $$.dst = $5; 413 $$.dport = $6; 414 } 415 | TO host port FROM host port { 416 $$.src = $5; 417 $$.sport = $6; 418 $$.dst = $2; 419 $$.dport = $3; 420 } 421 ; 422 423port : /* empty */ { $$ = 0; } 424 | PORT portval { $$ = $2; } 425 ; 426 427portval : STRING { 428 struct servent *s; 429 430 if ((s = getservbyname($1, "tcp")) != NULL || 431 (s = getservbyname($1, "udp")) != NULL) { 432 $$ = s->s_port; 433 } else { 434 yyerror("unknown port: %s", $1); 435 YYERROR; 436 } 437 } 438 | NUMBER { 439 if ($1 > USHRT_MAX || $1 < 0) { 440 yyerror("port outside range"); 441 YYERROR; 442 } 443 $$ = htons($1); 444 } 445 ; 446 447peers : /* empty */ { 448 $$.dst = NULL; 449 $$.src = NULL; 450 } 451 | PEER singlehost LOCAL singlehost { 452 $$.dst = $2; 453 $$.src = $4; 454 } 455 | LOCAL singlehost PEER singlehost { 456 $$.dst = $4; 457 $$.src = $2; 458 } 459 | PEER singlehost { 460 $$.dst = $2; 461 $$.src = NULL; 462 } 463 | LOCAL singlehost { 464 $$.dst = NULL; 465 $$.src = $2; 466 } 467 ; 468 469singlehost : /* empty */ { $$ = NULL; } 470 | STRING { 471 if (($$ = host($1)) == NULL) { 472 free($1); 473 yyerror("could not parse host specification"); 474 YYERROR; 475 } 476 free($1); 477 } 478 ; 479 480host_list : host { $$ = $1; } 481 | host_list comma host { 482 if ($3 == NULL) 483 $$ = $1; 484 else if ($1 == NULL) 485 $$ = $3; 486 else { 487 $1->tail->next = $3; 488 $1->tail = $3->tail; 489 $$ = $1; 490 } 491 } 492 ; 493 494host : STRING { 495 if (($$ = host($1)) == NULL) { 496 free($1); 497 yyerror("could not parse host specification"); 498 YYERROR; 499 } 500 free($1); 501 } 502 | STRING '/' NUMBER { 503 char *buf; 504 505 if (asprintf(&buf, "%s/%lld", $1, $3) == -1) 506 err(1, "host: asprintf"); 507 free($1); 508 if (($$ = host(buf)) == NULL) { 509 free(buf); 510 yyerror("could not parse host specification"); 511 YYERROR; 512 } 513 free(buf); 514 } 515 | ANY { 516 struct ipsec_addr_wrap *ipa; 517 518 ipa = calloc(1, sizeof(struct ipsec_addr_wrap)); 519 if (ipa == NULL) 520 err(1, "host: calloc"); 521 ipa->af = AF_UNSPEC; 522 ipa->netaddress = 1; 523 ipa->tail = ipa; 524 $$ = ipa; 525 } 526 | '{' host_list '}' { $$ = $2; } 527 ; 528 529ids : /* empty */ { 530 $$.srcid = NULL; 531 $$.dstid = NULL; 532 } 533 | SRCID id DSTID id { 534 $$.srcid = $2; 535 $$.dstid = $4; 536 } 537 | SRCID id { 538 $$.srcid = $2; 539 $$.dstid = NULL; 540 } 541 | DSTID id { 542 $$.srcid = NULL; 543 $$.dstid = $2; 544 } 545 ; 546 547type : /* empty */ { 548 $$ = TYPE_REQUIRE; 549 } 550 | TYPE USE { 551 $$ = TYPE_USE; 552 } 553 | TYPE ACQUIRE { 554 $$ = TYPE_ACQUIRE; 555 } 556 | TYPE REQUIRE { 557 $$ = TYPE_REQUIRE; 558 } 559 | TYPE DENY { 560 $$ = TYPE_DENY; 561 } 562 | TYPE BYPASS { 563 $$ = TYPE_BYPASS; 564 } 565 | TYPE DONTACQ { 566 $$ = TYPE_DONTACQ; 567 } 568 ; 569 570id : STRING { $$ = $1; } 571 ; 572 573spispec : SPI STRING { 574 u_int32_t spi; 575 char *p = strchr($2, ':'); 576 577 if (p != NULL) { 578 *p++ = 0; 579 580 if (atospi(p, &spi) == -1) { 581 free($2); 582 YYERROR; 583 } 584 $$.spiin = spi; 585 } else 586 $$.spiin = 0; 587 588 if (atospi($2, &spi) == -1) { 589 free($2); 590 YYERROR; 591 } 592 $$.spiout = spi; 593 594 595 free($2); 596 } 597 | SPI NUMBER { 598 if ($2 > UINT_MAX || $2 < 0) { 599 yyerror("%lld not a valid spi", $2); 600 YYERROR; 601 } 602 if ($2 >= SPI_RESERVED_MIN && $2 <= SPI_RESERVED_MAX) { 603 yyerror("%lld within reserved spi range", $2); 604 YYERROR; 605 } 606 607 $$.spiin = 0; 608 $$.spiout = $2; 609 } 610 ; 611 612transforms : { 613 if ((ipsec_transforms = calloc(1, 614 sizeof(struct ipsec_transforms))) == NULL) 615 err(1, "transforms: calloc"); 616 } 617 transforms_l 618 { $$ = ipsec_transforms; } 619 | /* empty */ { 620 if (($$ = calloc(1, 621 sizeof(struct ipsec_transforms))) == NULL) 622 err(1, "transforms: calloc"); 623 } 624 ; 625 626transforms_l : transforms_l transform 627 | transform 628 ; 629 630transform : AUTHXF STRING { 631 if (ipsec_transforms->authxf) 632 yyerror("auth already set"); 633 else { 634 ipsec_transforms->authxf = parse_xf($2, 635 authxfs); 636 if (!ipsec_transforms->authxf) 637 yyerror("%s not a valid transform", $2); 638 } 639 } 640 | ENCXF STRING { 641 if (ipsec_transforms->encxf) 642 yyerror("enc already set"); 643 else { 644 ipsec_transforms->encxf = parse_xf($2, encxfs); 645 if (!ipsec_transforms->encxf) 646 yyerror("%s not a valid transform", $2); 647 } 648 } 649 | COMPXF STRING { 650 if (ipsec_transforms->compxf) 651 yyerror("comp already set"); 652 else { 653 ipsec_transforms->compxf = parse_xf($2, 654 compxfs); 655 if (!ipsec_transforms->compxf) 656 yyerror("%s not a valid transform", $2); 657 } 658 } 659 | GROUP STRING { 660 if (ipsec_transforms->groupxf) 661 yyerror("group already set"); 662 else { 663 ipsec_transforms->groupxf = parse_xf($2, 664 groupxfs); 665 if (!ipsec_transforms->groupxf) 666 yyerror("%s not a valid transform", $2); 667 } 668 } 669 ; 670 671phase1mode : /* empty */ { 672 struct ike_mode *p1; 673 674 /* We create just an empty main mode */ 675 if ((p1 = calloc(1, sizeof(struct ike_mode))) == NULL) 676 err(1, "phase1mode: calloc"); 677 p1->ike_exch = IKE_MM; 678 $$ = p1; 679 } 680 | MAIN transforms life { 681 struct ike_mode *p1; 682 683 if ((p1 = calloc(1, sizeof(struct ike_mode))) == NULL) 684 err(1, "phase1mode: calloc"); 685 p1->xfs = $2; 686 p1->life = $3; 687 p1->ike_exch = IKE_MM; 688 $$ = p1; 689 } 690 | AGGRESSIVE transforms life { 691 struct ike_mode *p1; 692 693 if ((p1 = calloc(1, sizeof(struct ike_mode))) == NULL) 694 err(1, "phase1mode: calloc"); 695 p1->xfs = $2; 696 p1->life = $3; 697 p1->ike_exch = IKE_AM; 698 $$ = p1; 699 } 700 ; 701 702phase2mode : /* empty */ { 703 struct ike_mode *p2; 704 705 /* We create just an empty quick mode */ 706 if ((p2 = calloc(1, sizeof(struct ike_mode))) == NULL) 707 err(1, "phase1mode: calloc"); 708 p2->ike_exch = IKE_QM; 709 $$ = p2; 710 } 711 | QUICK transforms life { 712 struct ike_mode *p2; 713 714 if ((p2 = calloc(1, sizeof(struct ike_mode))) == NULL) 715 err(1, "phase1mode: calloc"); 716 p2->xfs = $2; 717 p2->life = $3; 718 p2->ike_exch = IKE_QM; 719 $$ = p2; 720 } 721 ; 722 723life : /* empty */ { 724 struct ipsec_life *life; 725 726 /* We create just an empty transform */ 727 if ((life = calloc(1, sizeof(struct ipsec_life))) 728 == NULL) 729 err(1, "life: calloc"); 730 life->lifetime = -1; 731 life->lifevolume = -1; 732 $$ = life; 733 } 734 | LIFE NUMBER { 735 if ($2 > INT_MAX || $2 < 0) { 736 yyerror("%lld not a valid lifetime", $2); 737 YYERROR; 738 } 739 $$ = parse_life($2); 740 } 741 ; 742 743authkeyspec : /* empty */ { 744 $$.keyout = NULL; 745 $$.keyin = NULL; 746 } 747 | AUTHKEY keyspec { 748 $$.keyout = $2.keyout; 749 $$.keyin = $2.keyin; 750 } 751 ; 752 753enckeyspec : /* empty */ { 754 $$.keyout = NULL; 755 $$.keyin = NULL; 756 } 757 | ENCKEY keyspec { 758 $$.keyout = $2.keyout; 759 $$.keyin = $2.keyin; 760 } 761 ; 762 763keyspec : STRING { 764 unsigned char *hex; 765 unsigned char *p = strchr($1, ':'); 766 767 if (p != NULL ) { 768 *p++ = 0; 769 770 if (!strncmp(p, "0x", 2)) 771 p += 2; 772 $$.keyin = parsekey(p, strlen(p)); 773 } else 774 $$.keyin = NULL; 775 776 hex = $1; 777 if (!strncmp(hex, "0x", 2)) 778 hex += 2; 779 $$.keyout = parsekey(hex, strlen(hex)); 780 781 free($1); 782 } 783 | FILENAME STRING { 784 unsigned char *p = strchr($2, ':'); 785 786 if (p != NULL) { 787 *p++ = 0; 788 $$.keyin = parsekeyfile(p); 789 } 790 $$.keyout = parsekeyfile($2); 791 free($2); 792 } 793 ; 794 795ikemode : /* empty */ { $$ = IKE_ACTIVE; } 796 | PASSIVE { $$ = IKE_PASSIVE; } 797 | DYNAMIC { $$ = IKE_DYNAMIC; } 798 | ACTIVE { $$ = IKE_ACTIVE; } 799 ; 800 801ikeauth : /* empty */ { 802 $$.type = IKE_AUTH_RSA; 803 $$.string = NULL; 804 } 805 | RSA { 806 $$.type = IKE_AUTH_RSA; 807 $$.string = NULL; 808 } 809 | PSK STRING { 810 $$.type = IKE_AUTH_PSK; 811 if (($$.string = strdup($2)) == NULL) 812 err(1, "ikeauth: strdup"); 813 } 814 ; 815 816tag : /* empty */ 817 { 818 $$ = NULL; 819 } 820 | TAG STRING 821 { 822 $$ = $2; 823 } 824 ; 825 826string : string STRING 827 { 828 if (asprintf(&$$, "%s %s", $1, $2) == -1) 829 err(1, "string: asprintf"); 830 free($1); 831 free($2); 832 } 833 | STRING 834 ; 835 836varset : STRING '=' string 837 { 838 if (ipsec->opts & IPSECCTL_OPT_VERBOSE) 839 printf("%s = \"%s\"\n", $1, $3); 840 if (symset($1, $3, 0) == -1) 841 err(1, "cannot store variable"); 842 free($1); 843 free($3); 844 } 845 ; 846 847%% 848 849struct keywords { 850 const char *k_name; 851 int k_val; 852}; 853 854int 855yyerror(const char *fmt, ...) 856{ 857 va_list ap; 858 859 file->errors++; 860 va_start(ap, fmt); 861 fprintf(stderr, "%s: %d: ", file->name, yylval.lineno); 862 vfprintf(stderr, fmt, ap); 863 fprintf(stderr, "\n"); 864 va_end(ap); 865 return (0); 866} 867 868int 869kw_cmp(const void *k, const void *e) 870{ 871 return (strcmp(k, ((const struct keywords *)e)->k_name)); 872} 873 874int 875lookup(char *s) 876{ 877 /* this has to be sorted always */ 878 static const struct keywords keywords[] = { 879 { "acquire", ACQUIRE }, 880 { "active", ACTIVE }, 881 { "aggressive", AGGRESSIVE }, 882 { "ah", AH }, 883 { "any", ANY }, 884 { "auth", AUTHXF }, 885 { "authkey", AUTHKEY }, 886 { "bypass", BYPASS }, 887 { "comp", COMPXF }, 888 { "deny", DENY }, 889 { "dontacq", DONTACQ }, 890 { "dstid", DSTID }, 891 { "dynamic", DYNAMIC }, 892 { "enc", ENCXF }, 893 { "enckey", ENCKEY }, 894 { "esp", ESP }, 895 { "file", FILENAME }, 896 { "flow", FLOW }, 897 { "from", FROM }, 898 { "group", GROUP }, 899 { "ike", IKE }, 900 { "in", IN }, 901 { "include", INCLUDE }, 902 { "ipcomp", IPCOMP }, 903 { "ipip", IPIP }, 904 { "life", LIFE }, 905 { "local", LOCAL }, 906 { "main", MAIN }, 907 { "out", OUT }, 908 { "passive", PASSIVE }, 909 { "peer", PEER }, 910 { "port", PORT }, 911 { "proto", PROTO }, 912 { "psk", PSK }, 913 { "quick", QUICK }, 914 { "require", REQUIRE }, 915 { "rsa", RSA }, 916 { "spi", SPI }, 917 { "srcid", SRCID }, 918 { "tag", TAG }, 919 { "tcpmd5", TCPMD5 }, 920 { "to", TO }, 921 { "transport", TRANSPORT }, 922 { "tunnel", TUNNEL }, 923 { "type", TYPE }, 924 { "use", USE } 925 }; 926 const struct keywords *p; 927 928 p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]), 929 sizeof(keywords[0]), kw_cmp); 930 931 if (p) { 932 if (debug > 1) 933 fprintf(stderr, "%s: %d\n", s, p->k_val); 934 return (p->k_val); 935 } else { 936 if (debug > 1) 937 fprintf(stderr, "string: %s\n", s); 938 return (STRING); 939 } 940} 941 942#define MAXPUSHBACK 128 943 944char *parsebuf; 945int parseindex; 946char pushback_buffer[MAXPUSHBACK]; 947int pushback_index = 0; 948 949int 950lgetc(int quotec) 951{ 952 int c, next; 953 954 if (parsebuf) { 955 /* Read character from the parsebuffer instead of input. */ 956 if (parseindex >= 0) { 957 c = parsebuf[parseindex++]; 958 if (c != '\0') 959 return (c); 960 parsebuf = NULL; 961 } else 962 parseindex++; 963 } 964 965 if (pushback_index) 966 return (pushback_buffer[--pushback_index]); 967 968 if (quotec) { 969 if ((c = getc(file->stream)) == EOF) { 970 yyerror("reached end of file while parsing quoted string"); 971 if (popfile() == EOF) 972 return (EOF); 973 return (quotec); 974 } 975 return (c); 976 } 977 978 while ((c = getc(file->stream)) == '\\') { 979 next = getc(file->stream); 980 if (next != '\n') { 981 c = next; 982 break; 983 } 984 yylval.lineno = file->lineno; 985 file->lineno++; 986 } 987 988 while (c == EOF) { 989 if (popfile() == EOF) 990 return (EOF); 991 c = getc(file->stream); 992 } 993 return (c); 994} 995 996int 997lungetc(int c) 998{ 999 if (c == EOF) 1000 return (EOF); 1001 if (parsebuf) { 1002 parseindex--; 1003 if (parseindex >= 0) 1004 return (c); 1005 } 1006 if (pushback_index < MAXPUSHBACK-1) 1007 return (pushback_buffer[pushback_index++] = c); 1008 else 1009 return (EOF); 1010} 1011 1012int 1013findeol(void) 1014{ 1015 int c; 1016 1017 parsebuf = NULL; 1018 pushback_index = 0; 1019 1020 /* skip to either EOF or the first real EOL */ 1021 while (1) { 1022 c = lgetc(0); 1023 if (c == '\n') { 1024 file->lineno++; 1025 break; 1026 } 1027 if (c == EOF) 1028 break; 1029 } 1030 return (ERROR); 1031} 1032 1033int 1034yylex(void) 1035{ 1036 char buf[8096]; 1037 char *p, *val; 1038 int quotec, next, c; 1039 int token; 1040 1041top: 1042 p = buf; 1043 while ((c = lgetc(0)) == ' ' || c == '\t') 1044 ; /* nothing */ 1045 1046 yylval.lineno = file->lineno; 1047 if (c == '#') 1048 while ((c = lgetc(0)) != '\n' && c != EOF) 1049 ; /* nothing */ 1050 if (c == '$' && parsebuf == NULL) { 1051 while (1) { 1052 if ((c = lgetc(0)) == EOF) 1053 return (0); 1054 1055 if (p + 1 >= buf + sizeof(buf) - 1) { 1056 yyerror("string too long"); 1057 return (findeol()); 1058 } 1059 if (isalnum(c) || c == '_') { 1060 *p++ = (char)c; 1061 continue; 1062 } 1063 *p = '\0'; 1064 lungetc(c); 1065 break; 1066 } 1067 val = symget(buf); 1068 if (val == NULL) { 1069 yyerror("macro '%s' not defined", buf); 1070 return (findeol()); 1071 } 1072 parsebuf = val; 1073 parseindex = 0; 1074 goto top; 1075 } 1076 1077 switch (c) { 1078 case '\'': 1079 case '"': 1080 quotec = c; 1081 while (1) { 1082 if ((c = lgetc(quotec)) == EOF) 1083 return (0); 1084 if (c == '\n') { 1085 file->lineno++; 1086 continue; 1087 } else if (c == '\\') { 1088 if ((next = lgetc(quotec)) == EOF) 1089 return (0); 1090 if (next == quotec || c == ' ' || c == '\t') 1091 c = next; 1092 else if (next == '\n') 1093 continue; 1094 else 1095 lungetc(next); 1096 } else if (c == quotec) { 1097 *p = '\0'; 1098 break; 1099 } 1100 if (p + 1 >= buf + sizeof(buf) - 1) { 1101 yyerror("string too long"); 1102 return (findeol()); 1103 } 1104 *p++ = (char)c; 1105 } 1106 yylval.v.string = strdup(buf); 1107 if (yylval.v.string == NULL) 1108 err(1, "yylex: strdup"); 1109 return (STRING); 1110 } 1111 1112#define allowed_to_end_number(x) \ 1113 (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=') 1114 1115 if (c == '-' || isdigit(c)) { 1116 do { 1117 *p++ = c; 1118 if ((unsigned)(p-buf) >= sizeof(buf)) { 1119 yyerror("string too long"); 1120 return (findeol()); 1121 } 1122 } while ((c = lgetc(0)) != EOF && isdigit(c)); 1123 lungetc(c); 1124 if (p == buf + 1 && buf[0] == '-') 1125 goto nodigits; 1126 if (c == EOF || allowed_to_end_number(c)) { 1127 const char *errstr = NULL; 1128 1129 *p = '\0'; 1130 yylval.v.number = strtonum(buf, LLONG_MIN, 1131 LLONG_MAX, &errstr); 1132 if (errstr) { 1133 yyerror("\"%s\" invalid number: %s", 1134 buf, errstr); 1135 return (findeol()); 1136 } 1137 return (NUMBER); 1138 } else { 1139nodigits: 1140 while (p > buf + 1) 1141 lungetc(*--p); 1142 c = *--p; 1143 if (c == '-') 1144 return (c); 1145 } 1146 } 1147 1148#define allowed_in_string(x) \ 1149 (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \ 1150 x != '{' && x != '}' && x != '<' && x != '>' && \ 1151 x != '!' && x != '=' && x != '/' && x != '#' && \ 1152 x != ',')) 1153 1154 if (isalnum(c) || c == ':' || c == '_' || c == '*') { 1155 do { 1156 *p++ = c; 1157 if ((unsigned)(p-buf) >= sizeof(buf)) { 1158 yyerror("string too long"); 1159 return (findeol()); 1160 } 1161 } while ((c = lgetc(0)) != EOF && (allowed_in_string(c))); 1162 lungetc(c); 1163 *p = '\0'; 1164 if ((token = lookup(buf)) == STRING) 1165 if ((yylval.v.string = strdup(buf)) == NULL) 1166 err(1, "yylex: strdup"); 1167 return (token); 1168 } 1169 if (c == '\n') { 1170 yylval.lineno = file->lineno; 1171 file->lineno++; 1172 } 1173 if (c == EOF) 1174 return (0); 1175 return (c); 1176} 1177 1178int 1179check_file_secrecy(int fd, const char *fname) 1180{ 1181 struct stat st; 1182 1183 if (fstat(fd, &st)) { 1184 warn("cannot stat %s", fname); 1185 return (-1); 1186 } 1187 if (st.st_uid != 0 && st.st_uid != getuid()) { 1188 warnx("%s: owner not root or current user", fname); 1189 return (-1); 1190 } 1191 if (st.st_mode & (S_IRWXG | S_IRWXO)) { 1192 warnx("%s: group/world readable/writeable", fname); 1193 return (-1); 1194 } 1195 return (0); 1196} 1197 1198struct file * 1199pushfile(const char *name, int secret) 1200{ 1201 struct file *nfile; 1202 1203 if ((nfile = calloc(1, sizeof(struct file))) == NULL || 1204 (nfile->name = strdup(name)) == NULL) { 1205 warn("malloc"); 1206 return (NULL); 1207 } 1208 if (TAILQ_FIRST(&files) == NULL && strcmp(nfile->name, "-") == 0) { 1209 nfile->stream = stdin; 1210 free(nfile->name); 1211 if ((nfile->name = strdup("stdin")) == NULL) { 1212 warn("strdup"); 1213 free(nfile); 1214 return (NULL); 1215 } 1216 } else if ((nfile->stream = fopen(nfile->name, "r")) == NULL) { 1217 warn("%s", nfile->name); 1218 free(nfile->name); 1219 free(nfile); 1220 return (NULL); 1221 } else if (secret && 1222 check_file_secrecy(fileno(nfile->stream), nfile->name)) { 1223 fclose(nfile->stream); 1224 free(nfile->name); 1225 free(nfile); 1226 return (NULL); 1227 } 1228 nfile->lineno = 1; 1229 TAILQ_INSERT_TAIL(&files, nfile, entry); 1230 return (nfile); 1231} 1232 1233int 1234popfile(void) 1235{ 1236 struct file *prev; 1237 1238 if ((prev = TAILQ_PREV(file, files, entry)) != NULL) { 1239 prev->errors += file->errors; 1240 TAILQ_REMOVE(&files, file, entry); 1241 fclose(file->stream); 1242 free(file->name); 1243 free(file); 1244 file = prev; 1245 return (0); 1246 } 1247 return (EOF); 1248} 1249 1250int 1251parse_rules(const char *filename, struct ipsecctl *ipsecx) 1252{ 1253 struct sym *sym; 1254 int errors = 0; 1255 1256 ipsec = ipsecx; 1257 1258 if ((file = pushfile(filename, 1)) == NULL) { 1259 return (-1); 1260 } 1261 1262 yyparse(); 1263 errors = file->errors; 1264 popfile(); 1265 1266 /* Free macros and check which have not been used. */ 1267 while ((sym = TAILQ_FIRST(&symhead))) { 1268 if ((ipsec->opts & IPSECCTL_OPT_VERBOSE2) && !sym->used) 1269 fprintf(stderr, "warning: macro '%s' not " 1270 "used\n", sym->nam); 1271 free(sym->nam); 1272 free(sym->val); 1273 TAILQ_REMOVE(&symhead, sym, entry); 1274 free(sym); 1275 } 1276 1277 return (errors ? -1 : 0); 1278} 1279 1280int 1281symset(const char *nam, const char *val, int persist) 1282{ 1283 struct sym *sym; 1284 1285 for (sym = TAILQ_FIRST(&symhead); sym && strcmp(nam, sym->nam); 1286 sym = TAILQ_NEXT(sym, entry)) 1287 ; /* nothing */ 1288 1289 if (sym != NULL) { 1290 if (sym->persist == 1) 1291 return (0); 1292 else { 1293 free(sym->nam); 1294 free(sym->val); 1295 TAILQ_REMOVE(&symhead, sym, entry); 1296 free(sym); 1297 } 1298 } 1299 if ((sym = calloc(1, sizeof(*sym))) == NULL) 1300 return (-1); 1301 1302 sym->nam = strdup(nam); 1303 if (sym->nam == NULL) { 1304 free(sym); 1305 return (-1); 1306 } 1307 sym->val = strdup(val); 1308 if (sym->val == NULL) { 1309 free(sym->nam); 1310 free(sym); 1311 return (-1); 1312 } 1313 sym->used = 0; 1314 sym->persist = persist; 1315 TAILQ_INSERT_TAIL(&symhead, sym, entry); 1316 return (0); 1317} 1318 1319int 1320cmdline_symset(char *s) 1321{ 1322 char *sym, *val; 1323 int ret; 1324 size_t len; 1325 1326 if ((val = strrchr(s, '=')) == NULL) 1327 return (-1); 1328 1329 len = strlen(s) - strlen(val) + 1; 1330 if ((sym = malloc(len)) == NULL) 1331 err(1, "cmdline_symset: malloc"); 1332 1333 strlcpy(sym, s, len); 1334 1335 ret = symset(sym, val + 1, 1); 1336 free(sym); 1337 1338 return (ret); 1339} 1340 1341char * 1342symget(const char *nam) 1343{ 1344 struct sym *sym; 1345 1346 TAILQ_FOREACH(sym, &symhead, entry) 1347 if (strcmp(nam, sym->nam) == 0) { 1348 sym->used = 1; 1349 return (sym->val); 1350 } 1351 return (NULL); 1352} 1353 1354int 1355atoul(char *s, u_long *ulvalp) 1356{ 1357 u_long ulval; 1358 char *ep; 1359 1360 errno = 0; 1361 ulval = strtoul(s, &ep, 0); 1362 if (s[0] == '\0' || *ep != '\0') 1363 return (-1); 1364 if (errno == ERANGE && ulval == ULONG_MAX) 1365 return (-1); 1366 *ulvalp = ulval; 1367 return (0); 1368} 1369 1370int 1371atospi(char *s, u_int32_t *spivalp) 1372{ 1373 unsigned long ulval; 1374 1375 if (atoul(s, &ulval) == -1) 1376 return (-1); 1377 if (ulval > UINT_MAX) { 1378 yyerror("%lld not a valid spi", ulval); 1379 return (-1); 1380 } 1381 if (ulval >= SPI_RESERVED_MIN && ulval <= SPI_RESERVED_MAX) { 1382 yyerror("%lld within reserved spi range", ulval); 1383 return (-1); 1384 } 1385 *spivalp = ulval; 1386 return (0); 1387} 1388 1389u_int8_t 1390x2i(unsigned char *s) 1391{ 1392 char ss[3]; 1393 1394 ss[0] = s[0]; 1395 ss[1] = s[1]; 1396 ss[2] = 0; 1397 1398 if (!isxdigit(s[0]) || !isxdigit(s[1])) { 1399 yyerror("keys need to be specified in hex digits"); 1400 return (-1); 1401 } 1402 return ((u_int8_t)strtoul(ss, NULL, 16)); 1403} 1404 1405struct ipsec_key * 1406parsekey(unsigned char *hexkey, size_t len) 1407{ 1408 struct ipsec_key *key; 1409 int i; 1410 1411 key = calloc(1, sizeof(struct ipsec_key)); 1412 if (key == NULL) 1413 err(1, "parsekey: calloc"); 1414 1415 key->len = len / 2; 1416 key->data = calloc(key->len, sizeof(u_int8_t)); 1417 if (key->data == NULL) 1418 err(1, "parsekey: calloc"); 1419 1420 for (i = 0; i < (int)key->len; i++) 1421 key->data[i] = x2i(hexkey + 2 * i); 1422 1423 return (key); 1424} 1425 1426struct ipsec_key * 1427parsekeyfile(char *filename) 1428{ 1429 struct stat sb; 1430 int fd; 1431 unsigned char *hex; 1432 1433 if ((fd = open(filename, O_RDONLY)) < 0) 1434 err(1, "open %s", filename); 1435 if (fstat(fd, &sb) < 0) 1436 err(1, "parsekeyfile: stat %s", filename); 1437 if ((sb.st_size > KEYSIZE_LIMIT) || (sb.st_size == 0)) 1438 errx(1, "%s: key too %s", filename, sb.st_size ? "large" : 1439 "small"); 1440 if ((hex = calloc(sb.st_size, sizeof(unsigned char))) == NULL) 1441 err(1, "parsekeyfile: calloc"); 1442 if (read(fd, hex, sb.st_size) < sb.st_size) 1443 err(1, "parsekeyfile: read"); 1444 close(fd); 1445 return (parsekey(hex, sb.st_size)); 1446} 1447 1448int 1449get_id_type(char *string) 1450{ 1451 if (string && strchr(string, '@')) 1452 return (ID_UFQDN); 1453 return (ID_FQDN); 1454} 1455 1456struct ipsec_addr_wrap * 1457host(const char *s) 1458{ 1459 struct ipsec_addr_wrap *ipa = NULL; 1460 int mask, cont = 1; 1461 char *p, *q, *ps; 1462 1463 if ((p = strrchr(s, '/')) != NULL) { 1464 errno = 0; 1465 mask = strtol(p + 1, &q, 0); 1466 if (errno == ERANGE || !q || *q || mask > 128 || q == (p + 1)) 1467 errx(1, "host: invalid netmask '%s'", p); 1468 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL) 1469 err(1, "host: calloc"); 1470 strlcpy(ps, s, strlen(s) - strlen(p) + 1); 1471 } else { 1472 if ((ps = strdup(s)) == NULL) 1473 err(1, "host: strdup"); 1474 mask = -1; 1475 } 1476 1477 /* Does interface with this name exist? */ 1478 if (cont && (ipa = host_if(ps, mask)) != NULL) 1479 cont = 0; 1480 1481 /* IPv4 address? */ 1482 if (cont && (ipa = host_v4(s, mask == -1 ? 32 : mask)) != NULL) 1483 cont = 0; 1484 1485 /* IPv6 address? */ 1486 if (cont && (ipa = host_v6(ps, mask == -1 ? 128 : mask)) != NULL) 1487 cont = 0; 1488 1489 /* dns lookup */ 1490 if (cont && mask == -1 && (ipa = host_dns(s, mask)) != NULL) 1491 cont = 0; 1492 free(ps); 1493 1494 if (ipa == NULL || cont == 1) { 1495 fprintf(stderr, "no IP address found for %s\n", s); 1496 return (NULL); 1497 } 1498 return (ipa); 1499} 1500 1501struct ipsec_addr_wrap * 1502host_v6(const char *s, int prefixlen) 1503{ 1504 struct ipsec_addr_wrap *ipa = NULL; 1505 struct addrinfo hints, *res; 1506 char hbuf[NI_MAXHOST]; 1507 1508 bzero(&hints, sizeof(struct addrinfo)); 1509 hints.ai_family = AF_INET6; 1510 hints.ai_socktype = SOCK_STREAM; 1511 hints.ai_flags = AI_NUMERICHOST; 1512 if (getaddrinfo(s, NULL, &hints, &res)) 1513 return (NULL); 1514 if (res->ai_next) 1515 err(1, "host_v6: numeric hostname expanded to multiple item"); 1516 1517 ipa = calloc(1, sizeof(struct ipsec_addr_wrap)); 1518 if (ipa == NULL) 1519 err(1, "host_v6: calloc"); 1520 ipa->af = res->ai_family; 1521 memcpy(&ipa->address.v6, 1522 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 1523 sizeof(struct in6_addr)); 1524 if (prefixlen > 128) 1525 prefixlen = 128; 1526 ipa->next = NULL; 1527 ipa->tail = ipa; 1528 1529 set_ipmask(ipa, prefixlen); 1530 if (getnameinfo(res->ai_addr, res->ai_addrlen, 1531 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST)) { 1532 errx(1, "could not get a numeric hostname"); 1533 } 1534 1535 if (prefixlen != 128) { 1536 ipa->netaddress = 1; 1537 asprintf(&ipa->name, "%s/%d", hbuf, prefixlen); 1538 } else 1539 ipa->name = strdup(hbuf); 1540 if (ipa->name == NULL) 1541 err(1, "host_v6: strdup"); 1542 1543 freeaddrinfo(res); 1544 1545 return (ipa); 1546} 1547 1548struct ipsec_addr_wrap * 1549host_v4(const char *s, int mask) 1550{ 1551 struct ipsec_addr_wrap *ipa = NULL; 1552 struct in_addr ina; 1553 int bits = 32; 1554 1555 bzero(&ina, sizeof(struct in_addr)); 1556 if (strrchr(s, '/') != NULL) { 1557 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1) 1558 return (NULL); 1559 } else { 1560 if (inet_pton(AF_INET, s, &ina) != 1) 1561 return (NULL); 1562 } 1563 1564 ipa = calloc(1, sizeof(struct ipsec_addr_wrap)); 1565 if (ipa == NULL) 1566 err(1, "host_v4: calloc"); 1567 1568 ipa->address.v4 = ina; 1569 ipa->name = strdup(s); 1570 if (ipa->name == NULL) 1571 err(1, "host_v4: strdup"); 1572 ipa->af = AF_INET; 1573 ipa->next = NULL; 1574 ipa->tail = ipa; 1575 1576 set_ipmask(ipa, bits); 1577 if (bits != (ipa->af == AF_INET ? 32 : 128)) 1578 ipa->netaddress = 1; 1579 1580 return (ipa); 1581} 1582 1583struct ipsec_addr_wrap * 1584host_dns(const char *s, int mask) 1585{ 1586 struct ipsec_addr_wrap *ipa = NULL, *head = NULL; 1587 struct addrinfo hints, *res0, *res; 1588 int error; 1589 char hbuf[NI_MAXHOST]; 1590 1591 bzero(&hints, sizeof(struct addrinfo)); 1592 hints.ai_family = PF_UNSPEC; 1593 hints.ai_socktype = SOCK_STREAM; 1594 error = getaddrinfo(s, NULL, &hints, &res0); 1595 if (error) 1596 return (NULL); 1597 1598 for (res = res0; res; res = res->ai_next) { 1599 if (res->ai_family != AF_INET && res->ai_family != AF_INET6) 1600 continue; 1601 1602 ipa = calloc(1, sizeof(struct ipsec_addr_wrap)); 1603 if (ipa == NULL) 1604 err(1, "host_dns: calloc"); 1605 switch (res->ai_family) { 1606 case AF_INET: 1607 memcpy(&ipa->address.v4, 1608 &((struct sockaddr_in *)res->ai_addr)->sin_addr, 1609 sizeof(struct in_addr)); 1610 break; 1611 case AF_INET6: 1612 /* XXX we do not support scoped IPv6 address yet */ 1613 if (((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id) { 1614 free(ipa); 1615 continue; 1616 } 1617 memcpy(&ipa->address.v6, 1618 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 1619 sizeof(struct in6_addr)); 1620 break; 1621 } 1622 error = getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, 1623 sizeof(hbuf), NULL, 0, NI_NUMERICHOST); 1624 if (error) 1625 err(1, "host_dns: getnameinfo"); 1626 ipa->name = strdup(hbuf); 1627 if (ipa->name == NULL) 1628 err(1, "host_dns: strdup"); 1629 ipa->af = res->ai_family; 1630 ipa->next = NULL; 1631 ipa->tail = ipa; 1632 if (head == NULL) 1633 head = ipa; 1634 else { 1635 head->tail->next = ipa; 1636 head->tail = ipa; 1637 } 1638 1639 /* 1640 * XXX for now, no netmask support for IPv6. 1641 * but since there's no way to specify address family, once you 1642 * have IPv6 address on a host, you cannot use dns/netmask 1643 * syntax. 1644 */ 1645 if (ipa->af == AF_INET) 1646 set_ipmask(ipa, mask == -1 ? 32 : mask); 1647 else 1648 if (mask != -1) 1649 err(1, "host_dns: cannot apply netmask " 1650 "on non-IPv4 address"); 1651 } 1652 freeaddrinfo(res0); 1653 1654 return (head); 1655} 1656 1657struct ipsec_addr_wrap * 1658host_if(const char *s, int mask) 1659{ 1660 struct ipsec_addr_wrap *ipa = NULL; 1661 1662 if (ifa_exists(s)) 1663 ipa = ifa_lookup(s); 1664 1665 return (ipa); 1666} 1667 1668/* interface lookup routintes */ 1669 1670struct ipsec_addr_wrap *iftab; 1671 1672void 1673ifa_load(void) 1674{ 1675 struct ifaddrs *ifap, *ifa; 1676 struct ipsec_addr_wrap *n = NULL, *h = NULL; 1677 1678 if (getifaddrs(&ifap) < 0) 1679 err(1, "ifa_load: getifaddrs"); 1680 1681 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 1682 if (!(ifa->ifa_addr->sa_family == AF_INET || 1683 ifa->ifa_addr->sa_family == AF_INET6 || 1684 ifa->ifa_addr->sa_family == AF_LINK)) 1685 continue; 1686 n = calloc(1, sizeof(struct ipsec_addr_wrap)); 1687 if (n == NULL) 1688 err(1, "ifa_load: calloc"); 1689 n->af = ifa->ifa_addr->sa_family; 1690 if ((n->name = strdup(ifa->ifa_name)) == NULL) 1691 err(1, "ifa_load: strdup"); 1692 if (n->af == AF_INET) { 1693 n->af = AF_INET; 1694 memcpy(&n->address.v4, &((struct sockaddr_in *) 1695 ifa->ifa_addr)->sin_addr, 1696 sizeof(struct in_addr)); 1697 memcpy(&n->mask.v4, &((struct sockaddr_in *) 1698 ifa->ifa_netmask)->sin_addr, 1699 sizeof(struct in_addr)); 1700 } else if (n->af == AF_INET6) { 1701 n->af = AF_INET6; 1702 memcpy(&n->address.v6, &((struct sockaddr_in6 *) 1703 ifa->ifa_addr)->sin6_addr, 1704 sizeof(struct in6_addr)); 1705 memcpy(&n->mask.v6, &((struct sockaddr_in6 *) 1706 ifa->ifa_netmask)->sin6_addr, 1707 sizeof(struct in6_addr)); 1708 } 1709 n->next = NULL; 1710 n->tail = n; 1711 if (h == NULL) 1712 h = n; 1713 else { 1714 h->tail->next = n; 1715 h->tail = n; 1716 } 1717 } 1718 1719 iftab = h; 1720 freeifaddrs(ifap); 1721} 1722 1723int 1724ifa_exists(const char *ifa_name) 1725{ 1726 struct ipsec_addr_wrap *n; 1727 struct ifgroupreq ifgr; 1728 int s; 1729 1730 if (iftab == NULL) 1731 ifa_load(); 1732 1733 /* check wether this is a group */ 1734 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) 1735 err(1, "ifa_exists: socket"); 1736 bzero(&ifgr, sizeof(ifgr)); 1737 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name)); 1738 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == 0) { 1739 close(s); 1740 return (1); 1741 } 1742 close(s); 1743 1744 for (n = iftab; n; n = n->next) { 1745 if (n->af == AF_LINK && !strncmp(n->name, ifa_name, 1746 IFNAMSIZ)) 1747 return (1); 1748 } 1749 1750 return (0); 1751} 1752 1753struct ipsec_addr_wrap * 1754ifa_grouplookup(const char *ifa_name) 1755{ 1756 struct ifg_req *ifg; 1757 struct ifgroupreq ifgr; 1758 int s; 1759 size_t len; 1760 struct ipsec_addr_wrap *n, *h = NULL, *hn; 1761 1762 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) 1763 err(1, "socket"); 1764 bzero(&ifgr, sizeof(ifgr)); 1765 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name)); 1766 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) { 1767 close(s); 1768 return (NULL); 1769 } 1770 1771 len = ifgr.ifgr_len; 1772 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL) 1773 err(1, "calloc"); 1774 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) 1775 err(1, "ioctl"); 1776 1777 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req); 1778 ifg++) { 1779 len -= sizeof(struct ifg_req); 1780 if ((n = ifa_lookup(ifg->ifgrq_member)) == NULL) 1781 continue; 1782 if (h == NULL) 1783 h = n; 1784 else { 1785 for (hn = h; hn->next != NULL; hn = hn->next) 1786 ; /* nothing */ 1787 hn->next = n; 1788 n->tail = hn; 1789 } 1790 } 1791 free(ifgr.ifgr_groups); 1792 close(s); 1793 1794 return (h); 1795} 1796 1797struct ipsec_addr_wrap * 1798ifa_lookup(const char *ifa_name) 1799{ 1800 struct ipsec_addr_wrap *p = NULL, *h = NULL, *n = NULL; 1801 1802 if (iftab == NULL) 1803 ifa_load(); 1804 1805 if ((n = ifa_grouplookup(ifa_name)) != NULL) 1806 return (n); 1807 1808 for (p = iftab; p; p = p->next) { 1809 if (p->af != AF_INET && p->af != AF_INET6) 1810 continue; 1811 if (strncmp(p->name, ifa_name, IFNAMSIZ)) 1812 continue; 1813 n = calloc(1, sizeof(struct ipsec_addr_wrap)); 1814 if (n == NULL) 1815 err(1, "ifa_lookup: calloc"); 1816 memcpy(n, p, sizeof(struct ipsec_addr_wrap)); 1817 if ((n->name = strdup(p->name)) == NULL) 1818 err(1, "ifa_lookup: strdup"); 1819 switch (n->af) { 1820 case AF_INET: 1821 set_ipmask(n, 32); 1822 break; 1823 case AF_INET6: 1824 /* route/show.c and bgpd/util.c give KAME credit */ 1825 if (IN6_IS_ADDR_LINKLOCAL(&n->address.v6)) { 1826 u_int16_t tmp16; 1827 /* for now we can not handle link local, 1828 * therefore bail for now 1829 */ 1830 free(n); 1831 continue; 1832 1833 memcpy(&tmp16, &n->address.v6.s6_addr[2], 1834 sizeof(tmp16)); 1835 /* use this when we support link-local 1836 * n->??.scopeid = ntohs(tmp16); 1837 */ 1838 n->address.v6.s6_addr[2] = 0; 1839 n->address.v6.s6_addr[3] = 0; 1840 } 1841 set_ipmask(n, 128); 1842 break; 1843 } 1844 1845 n->next = NULL; 1846 n->tail = n; 1847 if (h == NULL) 1848 h = n; 1849 else { 1850 h->tail->next = n; 1851 h->tail = n; 1852 } 1853 } 1854 1855 return (h); 1856} 1857 1858void 1859set_ipmask(struct ipsec_addr_wrap *address, u_int8_t b) 1860{ 1861 struct ipsec_addr *ipa; 1862 int i, j = 0; 1863 1864 ipa = &address->mask; 1865 bzero(ipa, sizeof(struct ipsec_addr)); 1866 1867 while (b >= 32) { 1868 ipa->addr32[j++] = 0xffffffff; 1869 b -= 32; 1870 } 1871 for (i = 31; i > 31 - b; --i) 1872 ipa->addr32[j] |= (1 << i); 1873 if (b) 1874 ipa->addr32[j] = htonl(ipa->addr32[j]); 1875} 1876 1877const struct ipsec_xf * 1878parse_xf(const char *name, const struct ipsec_xf xfs[]) 1879{ 1880 int i; 1881 1882 for (i = 0; xfs[i].name != NULL; i++) { 1883 if (strncmp(name, xfs[i].name, strlen(name))) 1884 continue; 1885 return &xfs[i]; 1886 } 1887 return (NULL); 1888} 1889 1890struct ipsec_life * 1891parse_life(int value) 1892{ 1893 struct ipsec_life *life; 1894 1895 life = calloc(1, sizeof(struct ipsec_life)); 1896 if (life == NULL) 1897 err(1, "calloc"); 1898 1899 life->lifetime = value; 1900 1901 return (life); 1902} 1903 1904struct ipsec_transforms * 1905copytransforms(const struct ipsec_transforms *xfs) 1906{ 1907 struct ipsec_transforms *newxfs; 1908 1909 if (xfs == NULL) 1910 return (NULL); 1911 1912 newxfs = calloc(1, sizeof(struct ipsec_transforms)); 1913 if (newxfs == NULL) 1914 err(1, "copytransforms: calloc"); 1915 1916 memcpy(newxfs, xfs, sizeof(struct ipsec_transforms)); 1917 return (newxfs); 1918} 1919 1920struct ipsec_life * 1921copylife(const struct ipsec_life *life) 1922{ 1923 struct ipsec_life *newlife; 1924 1925 if (life == NULL) 1926 return (NULL); 1927 1928 newlife = calloc(1, sizeof(struct ipsec_life)); 1929 if (newlife == NULL) 1930 err(1, "copylife: calloc"); 1931 1932 memcpy(newlife, life, sizeof(struct ipsec_life)); 1933 return (newlife); 1934} 1935 1936struct ipsec_auth * 1937copyipsecauth(const struct ipsec_auth *auth) 1938{ 1939 struct ipsec_auth *newauth; 1940 1941 if (auth == NULL) 1942 return (NULL); 1943 1944 if ((newauth = calloc(1, sizeof(struct ipsec_auth))) == NULL) 1945 err(1, "calloc"); 1946 if (auth->srcid && 1947 asprintf(&newauth->srcid, "%s", auth->srcid) == -1) 1948 err(1, "asprintf"); 1949 if (auth->dstid && 1950 asprintf(&newauth->dstid, "%s", auth->dstid) == -1) 1951 err(1, "asprintf"); 1952 1953 newauth->srcid_type = auth->srcid_type; 1954 newauth->dstid_type = auth->dstid_type; 1955 newauth->type = auth->type; 1956 1957 return (newauth); 1958} 1959 1960struct ike_auth * 1961copyikeauth(const struct ike_auth *auth) 1962{ 1963 struct ike_auth *newauth; 1964 1965 if (auth == NULL) 1966 return (NULL); 1967 1968 if ((newauth = calloc(1, sizeof(struct ike_auth))) == NULL) 1969 err(1, "calloc"); 1970 if (auth->string && 1971 asprintf(&newauth->string, "%s", auth->string) == -1) 1972 err(1, "asprintf"); 1973 1974 newauth->type = auth->type; 1975 1976 return (newauth); 1977} 1978 1979struct ipsec_key * 1980copykey(struct ipsec_key *key) 1981{ 1982 struct ipsec_key *newkey; 1983 1984 if (key == NULL) 1985 return (NULL); 1986 1987 if ((newkey = calloc(1, sizeof(struct ipsec_key))) == NULL) 1988 err(1, "calloc"); 1989 if ((newkey->data = calloc(key->len, sizeof(u_int8_t))) == NULL) 1990 err(1, "calloc"); 1991 memcpy(newkey->data, key->data, key->len); 1992 newkey->len = key->len; 1993 1994 return (newkey); 1995} 1996 1997struct ipsec_addr_wrap * 1998copyhost(const struct ipsec_addr_wrap *src) 1999{ 2000 struct ipsec_addr_wrap *dst; 2001 2002 if (src == NULL) 2003 return (NULL); 2004 2005 dst = calloc(1, sizeof(struct ipsec_addr_wrap)); 2006 if (dst == NULL) 2007 err(1, "copyhost: calloc"); 2008 2009 memcpy(dst, src, sizeof(struct ipsec_addr_wrap)); 2010 2011 if (src->name != NULL && (dst->name = strdup(src->name)) == NULL) 2012 err(1, "copyhost: strdup"); 2013 2014 return dst; 2015} 2016 2017char * 2018copytag(const char *src) 2019{ 2020 char *tag; 2021 2022 if (src == NULL) 2023 return (NULL); 2024 if ((tag = strdup(src)) == NULL) 2025 err(1, "copytag: strdup"); 2026 2027 return (tag); 2028} 2029 2030struct ipsec_rule * 2031copyrule(struct ipsec_rule *rule) 2032{ 2033 struct ipsec_rule *r; 2034 2035 if ((r = calloc(1, sizeof(struct ipsec_rule))) == NULL) 2036 err(1, "calloc"); 2037 2038 r->src = copyhost(rule->src); 2039 r->dst = copyhost(rule->dst); 2040 r->local = copyhost(rule->local); 2041 r->peer = copyhost(rule->peer); 2042 r->auth = copyipsecauth(rule->auth); 2043 r->ikeauth = copyikeauth(rule->ikeauth); 2044 r->xfs = copytransforms(rule->xfs); 2045 r->p1xfs = copytransforms(rule->p1xfs); 2046 r->p2xfs = copytransforms(rule->p2xfs); 2047 r->p1life = copylife(rule->p1life); 2048 r->p2life = copylife(rule->p2life); 2049 r->authkey = copykey(rule->authkey); 2050 r->enckey = copykey(rule->enckey); 2051 r->tag = copytag(rule->tag); 2052 2053 r->p1ie = rule->p1ie; 2054 r->p2ie = rule->p2ie; 2055 r->type = rule->type; 2056 r->satype = rule->satype; 2057 r->proto = rule->proto; 2058 r->tmode = rule->tmode; 2059 r->direction = rule->direction; 2060 r->flowtype = rule->flowtype; 2061 r->sport = rule->sport; 2062 r->dport = rule->dport; 2063 r->ikemode = rule->ikemode; 2064 r->spi = rule->spi; 2065 r->nr = rule->nr; 2066 2067 return (r); 2068} 2069 2070int 2071validate_af(struct ipsec_addr_wrap *src, struct ipsec_addr_wrap *dst) 2072{ 2073 struct ipsec_addr_wrap *ta; 2074 u_int8_t src_v4 = 0; 2075 u_int8_t dst_v4 = 0; 2076 u_int8_t src_v6 = 0; 2077 u_int8_t dst_v6 = 0; 2078 2079 for (ta = src; ta; ta = ta->next) { 2080 if (ta->af == AF_INET) 2081 src_v4 = 1; 2082 if (ta->af == AF_INET6) 2083 src_v6 = 1; 2084 if (ta->af == AF_UNSPEC) 2085 return 0; 2086 if (src_v4 && src_v6) 2087 break; 2088 } 2089 for (ta = dst; ta; ta = ta->next) { 2090 if (ta->af == AF_INET) 2091 dst_v4 = 1; 2092 if (ta->af == AF_INET6) 2093 dst_v6 = 1; 2094 if (ta->af == AF_UNSPEC) 2095 return 0; 2096 if (dst_v4 && dst_v6) 2097 break; 2098 } 2099 if (src_v4 != dst_v4 && src_v6 != dst_v6) 2100 return (1); 2101 2102 return (0); 2103} 2104 2105 2106int 2107validate_sa(u_int32_t spi, u_int8_t satype, struct ipsec_transforms *xfs, 2108 struct ipsec_key *authkey, struct ipsec_key *enckey, u_int8_t tmode) 2109{ 2110 /* Sanity checks */ 2111 if (spi == 0) { 2112 yyerror("no SPI specified"); 2113 return (0); 2114 } 2115 if (satype == IPSEC_AH) { 2116 if (!xfs) { 2117 yyerror("no transforms specified"); 2118 return (0); 2119 } 2120 if (!xfs->authxf) 2121 xfs->authxf = &authxfs[AUTHXF_HMAC_SHA2_256]; 2122 if (xfs->encxf) { 2123 yyerror("ah does not provide encryption"); 2124 return (0); 2125 } 2126 if (xfs->compxf) { 2127 yyerror("ah does not provide compression"); 2128 return (0); 2129 } 2130 } 2131 if (satype == IPSEC_ESP) { 2132 if (!xfs) { 2133 yyerror("no transforms specified"); 2134 return (0); 2135 } 2136 if (xfs->compxf) { 2137 yyerror("esp does not provide compression"); 2138 return (0); 2139 } 2140 if (!xfs->authxf) 2141 xfs->authxf = &authxfs[AUTHXF_HMAC_SHA2_256]; 2142 if (!xfs->encxf) 2143 xfs->encxf = &encxfs[ENCXF_AES]; 2144 } 2145 if (satype == IPSEC_IPCOMP) { 2146 if (!xfs) { 2147 yyerror("no transform specified"); 2148 return (0); 2149 } 2150 if (xfs->authxf || xfs->encxf) { 2151 yyerror("no encryption or authentication with ipcomp"); 2152 return (0); 2153 } 2154 if (!xfs->compxf) 2155 xfs->compxf = &compxfs[COMPXF_DEFLATE]; 2156 } 2157 if (satype == IPSEC_IPIP) { 2158 if (!xfs) { 2159 yyerror("no transform specified"); 2160 return (0); 2161 } 2162 if (xfs->authxf || xfs->encxf || xfs->compxf) { 2163 yyerror("no encryption, authentication or compression" 2164 " with ipip"); 2165 return (0); 2166 } 2167 } 2168 if (satype == IPSEC_TCPMD5 && authkey == NULL && tmode != 2169 IPSEC_TRANSPORT) { 2170 yyerror("authentication key needed for tcpmd5"); 2171 return (0); 2172 } 2173 if (xfs && xfs->authxf) { 2174 if (!authkey && xfs->authxf != &authxfs[AUTHXF_NONE]) { 2175 yyerror("no authentication key specified"); 2176 return (0); 2177 } 2178 if (authkey && authkey->len != xfs->authxf->keymin) { 2179 yyerror("wrong authentication key length, needs to be " 2180 "%d bits", xfs->authxf->keymin * 8); 2181 return (0); 2182 } 2183 } 2184 if (xfs && xfs->encxf) { 2185 if (!enckey && xfs->encxf != &encxfs[ENCXF_NULL]) { 2186 yyerror("no encryption key specified"); 2187 return (0); 2188 } 2189 if (enckey) { 2190 if (enckey->len < xfs->encxf->keymin) { 2191 yyerror("encryption key too short (%d bits), " 2192 "minimum %d bits", enckey->len * 8, 2193 xfs->encxf->keymin * 8); 2194 return (0); 2195 } 2196 if (xfs->encxf->keymax < enckey->len) { 2197 yyerror("encryption key too long (%d bits), " 2198 "maximum %d bits", enckey->len * 8, 2199 xfs->encxf->keymax * 8); 2200 return (0); 2201 } 2202 } 2203 } 2204 2205 return 1; 2206} 2207 2208int 2209add_sagroup(struct ipsec_rule *r) 2210{ 2211 struct ipsec_rule *rp, *last, *group; 2212 int found = 0; 2213 2214 TAILQ_FOREACH(rp, &ipsec->group_queue, group_entry) { 2215 if ((strcmp(rp->src->name, r->src->name) == 0) && 2216 (strcmp(rp->dst->name, r->dst->name) == 0)) { 2217 found = 1; 2218 break; 2219 } 2220 } 2221 if (found) { 2222 last = TAILQ_LAST(&rp->dst_group_queue, dst_group_queue); 2223 TAILQ_INSERT_TAIL(&rp->dst_group_queue, r, dst_group_entry); 2224 2225 group = create_sagroup(last->dst, last->satype, last->spi, 2226 r->dst, r->satype, r->spi); 2227 if (group == NULL) 2228 return (1); 2229 group->nr = ipsec->rule_nr++; 2230 if (ipsecctl_add_rule(ipsec, group)) 2231 return (1); 2232 } else { 2233 TAILQ_INSERT_TAIL(&ipsec->group_queue, r, group_entry); 2234 TAILQ_INIT(&r->dst_group_queue); 2235 TAILQ_INSERT_TAIL(&r->dst_group_queue, r, dst_group_entry); 2236 } 2237 2238 return (0); 2239} 2240 2241struct ipsec_rule * 2242create_sa(u_int8_t satype, u_int8_t tmode, struct ipsec_hosts *hosts, 2243 u_int32_t spi, struct ipsec_transforms *xfs, struct ipsec_key *authkey, 2244 struct ipsec_key *enckey) 2245{ 2246 struct ipsec_rule *r; 2247 2248 if (validate_sa(spi, satype, xfs, authkey, enckey, tmode) == 0) 2249 return (NULL); 2250 2251 r = calloc(1, sizeof(struct ipsec_rule)); 2252 if (r == NULL) 2253 err(1, "create_sa: calloc"); 2254 2255 r->type |= RULE_SA; 2256 r->satype = satype; 2257 r->tmode = tmode; 2258 r->src = hosts->src; 2259 r->dst = hosts->dst; 2260 r->spi = spi; 2261 r->xfs = xfs; 2262 r->authkey = authkey; 2263 r->enckey = enckey; 2264 2265 return r; 2266} 2267 2268struct ipsec_rule * 2269reverse_sa(struct ipsec_rule *rule, u_int32_t spi, struct ipsec_key *authkey, 2270 struct ipsec_key *enckey) 2271{ 2272 struct ipsec_rule *reverse; 2273 2274 if (validate_sa(spi, rule->satype, rule->xfs, authkey, enckey, 2275 rule->tmode) == 0) 2276 return (NULL); 2277 2278 reverse = calloc(1, sizeof(struct ipsec_rule)); 2279 if (reverse == NULL) 2280 err(1, "reverse_sa: calloc"); 2281 2282 reverse->type |= RULE_SA; 2283 reverse->satype = rule->satype; 2284 reverse->tmode = rule->tmode; 2285 reverse->src = copyhost(rule->dst); 2286 reverse->dst = copyhost(rule->src); 2287 reverse->spi = spi; 2288 reverse->xfs = copytransforms(rule->xfs); 2289 reverse->authkey = authkey; 2290 reverse->enckey = enckey; 2291 2292 return (reverse); 2293} 2294 2295struct ipsec_rule * 2296create_sagroup(struct ipsec_addr_wrap *dst, u_int8_t proto, u_int32_t spi, 2297 struct ipsec_addr_wrap *dst2, u_int8_t proto2, u_int32_t spi2) 2298{ 2299 struct ipsec_rule *r; 2300 2301 r = calloc(1, sizeof(struct ipsec_rule)); 2302 if (r == NULL) 2303 err(1, "create_sagroup: calloc"); 2304 2305 r->type |= RULE_GROUP; 2306 2307 r->dst = copyhost(dst); 2308 r->dst2 = copyhost(dst2); 2309 r->proto = proto; 2310 r->proto2 = proto2; 2311 r->spi = spi; 2312 r->spi2 = spi2; 2313 r->satype = proto; 2314 2315 return (r); 2316} 2317 2318struct ipsec_rule * 2319create_flow(u_int8_t dir, u_int8_t proto, struct ipsec_hosts *hosts, 2320 u_int8_t satype, char *srcid, char *dstid, u_int8_t type) 2321{ 2322 struct ipsec_rule *r; 2323 2324 r = calloc(1, sizeof(struct ipsec_rule)); 2325 if (r == NULL) 2326 err(1, "create_flow: calloc"); 2327 2328 r->type |= RULE_FLOW; 2329 2330 if (dir == IPSEC_INOUT) 2331 r->direction = IPSEC_OUT; 2332 else 2333 r->direction = dir; 2334 2335 r->satype = satype; 2336 r->proto = proto; 2337 r->src = hosts->src; 2338 r->sport = hosts->sport; 2339 r->dst = hosts->dst; 2340 r->dport = hosts->dport; 2341 if ((hosts->sport != 0 || hosts->dport != 0) && 2342 (proto != IPPROTO_TCP && proto != IPPROTO_UDP)) { 2343 yyerror("no protocol supplied with source/destination ports"); 2344 goto errout; 2345 } 2346 2347 r->flowtype = type; 2348 if (type == TYPE_DENY || type == TYPE_BYPASS) 2349 return (r); 2350 2351 r->auth = calloc(1, sizeof(struct ipsec_auth)); 2352 if (r->auth == NULL) 2353 err(1, "create_flow: calloc"); 2354 r->auth->srcid = srcid; 2355 r->auth->dstid = dstid; 2356 r->auth->srcid_type = get_id_type(srcid); 2357 r->auth->dstid_type = get_id_type(dstid); 2358 return r; 2359 2360errout: 2361 free(r); 2362 if (srcid) 2363 free(srcid); 2364 if (dstid) 2365 free(dstid); 2366 free(hosts->src); 2367 hosts->src = NULL; 2368 free(hosts->dst); 2369 hosts->dst = NULL; 2370 2371 return NULL; 2372} 2373 2374void 2375expand_any(struct ipsec_addr_wrap *ipa_in) 2376{ 2377 struct ipsec_addr_wrap *oldnext, *ipa; 2378 2379 for (ipa = ipa_in; ipa; ipa = ipa->next) { 2380 if (ipa->af != AF_UNSPEC) 2381 continue; 2382 oldnext = ipa->next; 2383 2384 ipa->af = AF_INET; 2385 ipa->netaddress = 1; 2386 if ((ipa->name = strdup("0.0.0.0/0")) == NULL) 2387 err(1, "expand_any: strdup"); 2388 2389 ipa->next = calloc(1, sizeof(struct ipsec_addr_wrap)); 2390 if (ipa->next == NULL) 2391 err(1, "expand_any: calloc"); 2392 ipa->next->af = AF_INET6; 2393 ipa->next->netaddress = 1; 2394 if ((ipa->next->name = strdup("::/0")) == NULL) 2395 err(1, "expand_any: strdup"); 2396 2397 ipa->next->next = oldnext; 2398 } 2399} 2400 2401int 2402set_rule_peers(struct ipsec_rule *r, struct ipsec_hosts *peers) 2403{ 2404 if (r->type == RULE_FLOW && 2405 (r->flowtype == TYPE_DENY || r->flowtype == TYPE_BYPASS)) 2406 return (0); 2407 2408 r->local = copyhost(peers->src); 2409 r->peer = copyhost(peers->dst); 2410 if (r->peer == NULL) { 2411 /* Set peer to remote host. Must be a host address. */ 2412 if (r->direction == IPSEC_IN) { 2413 if (r->src->netaddress) 2414 r->peer = NULL; 2415 else 2416 r->peer = copyhost(r->src); 2417 } else { 2418 if (r->dst->netaddress) 2419 r->peer = NULL; 2420 else 2421 r->peer = copyhost(r->dst); 2422 } 2423 } 2424 2425 if (r->type == RULE_FLOW && r->peer == NULL) { 2426 yyerror("no peer specified for destination %s", 2427 r->dst->name); 2428 return (1); 2429 } 2430 return (0); 2431} 2432 2433int 2434expand_rule(struct ipsec_rule *rule, struct ipsec_hosts *peers, 2435 u_int8_t direction, u_int32_t spi, struct ipsec_key *authkey, 2436 struct ipsec_key *enckey, int group) 2437{ 2438 struct ipsec_rule *r, *revr; 2439 struct ipsec_addr_wrap *src, *dst; 2440 int added = 0, ret = 1; 2441 2442 if (validate_af(rule->src, rule->dst)) { 2443 yyerror("source/destination address families do not match"); 2444 goto errout; 2445 } 2446 expand_any(rule->src); 2447 expand_any(rule->dst); 2448 for (src = rule->src; src; src = src->next) { 2449 for (dst = rule->dst; dst; dst = dst->next) { 2450 if (src->af != dst->af) 2451 continue; 2452 r = copyrule(rule); 2453 2454 r->src = copyhost(src); 2455 r->dst = copyhost(dst); 2456 2457 if (peers && set_rule_peers(r, peers)) { 2458 ipsecctl_free_rule(r); 2459 goto errout; 2460 } 2461 2462 r->nr = ipsec->rule_nr++; 2463 if (ipsecctl_add_rule(ipsec, r)) 2464 goto out; 2465 if (group && add_sagroup(r)) 2466 goto out; 2467 2468 if (direction == IPSEC_INOUT) { 2469 /* Create and add reverse flow rule. */ 2470 revr = reverse_rule(r); 2471 if (revr == NULL) 2472 goto out; 2473 2474 revr->nr = ipsec->rule_nr++; 2475 if (ipsecctl_add_rule(ipsec, revr)) 2476 goto out; 2477 if (group && add_sagroup(revr)) 2478 goto out; 2479 } else if (spi != 0 || authkey || enckey) { 2480 /* Create and add reverse sa rule. */ 2481 revr = reverse_sa(r, spi, authkey, enckey); 2482 if (revr == NULL) 2483 goto out; 2484 2485 revr->nr = ipsec->rule_nr++; 2486 if (ipsecctl_add_rule(ipsec, revr)) 2487 goto out; 2488 if (group && add_sagroup(revr)) 2489 goto out; 2490 } 2491 added++; 2492 } 2493 } 2494 if (!added) 2495 yyerror("rule expands to no valid combination"); 2496 errout: 2497 ret = 0; 2498 ipsecctl_free_rule(rule); 2499 out: 2500 if (peers) { 2501 if (peers->src) 2502 free(peers->src); 2503 if (peers->dst) 2504 free(peers->dst); 2505 } 2506 return (ret); 2507} 2508 2509struct ipsec_rule * 2510reverse_rule(struct ipsec_rule *rule) 2511{ 2512 struct ipsec_rule *reverse; 2513 2514 reverse = calloc(1, sizeof(struct ipsec_rule)); 2515 if (reverse == NULL) 2516 err(1, "reverse_rule: calloc"); 2517 2518 reverse->type |= RULE_FLOW; 2519 2520 /* Reverse direction */ 2521 if (rule->direction == (u_int8_t)IPSEC_OUT) 2522 reverse->direction = (u_int8_t)IPSEC_IN; 2523 else 2524 reverse->direction = (u_int8_t)IPSEC_OUT; 2525 2526 reverse->flowtype = rule->flowtype; 2527 reverse->src = copyhost(rule->dst); 2528 reverse->dst = copyhost(rule->src); 2529 reverse->sport = rule->dport; 2530 reverse->dport = rule->sport; 2531 if (rule->local) 2532 reverse->local = copyhost(rule->local); 2533 if (rule->peer) 2534 reverse->peer = copyhost(rule->peer); 2535 reverse->satype = rule->satype; 2536 reverse->proto = rule->proto; 2537 2538 if (rule->auth) { 2539 reverse->auth = calloc(1, sizeof(struct ipsec_auth)); 2540 if (reverse->auth == NULL) 2541 err(1, "reverse_rule: calloc"); 2542 if (rule->auth->dstid && (reverse->auth->dstid = 2543 strdup(rule->auth->dstid)) == NULL) 2544 err(1, "reverse_rule: strdup"); 2545 if (rule->auth->srcid && (reverse->auth->srcid = 2546 strdup(rule->auth->srcid)) == NULL) 2547 err(1, "reverse_rule: strdup"); 2548 reverse->auth->srcid_type = rule->auth->srcid_type; 2549 reverse->auth->dstid_type = rule->auth->dstid_type; 2550 reverse->auth->type = rule->auth->type; 2551 } 2552 2553 return reverse; 2554} 2555 2556struct ipsec_rule * 2557create_ike(u_int8_t proto, struct ipsec_hosts *hosts, 2558 struct ike_mode *phase1mode, struct ike_mode *phase2mode, u_int8_t satype, 2559 u_int8_t tmode, u_int8_t mode, char *srcid, char *dstid, 2560 struct ike_auth *authtype, char *tag) 2561{ 2562 struct ipsec_rule *r; 2563 2564 r = calloc(1, sizeof(struct ipsec_rule)); 2565 if (r == NULL) 2566 err(1, "create_ike: calloc"); 2567 2568 r->type = RULE_IKE; 2569 2570 r->proto = proto; 2571 r->src = hosts->src; 2572 r->sport = hosts->sport; 2573 r->dst = hosts->dst; 2574 r->dport = hosts->dport; 2575 if ((hosts->sport != 0 || hosts->dport != 0) && 2576 (proto != IPPROTO_TCP && proto != IPPROTO_UDP)) { 2577 yyerror("no protocol supplied with source/destination ports"); 2578 free(r); 2579 free(hosts->src); 2580 hosts->src = NULL; 2581 free(hosts->dst); 2582 hosts->dst = NULL; 2583 if (phase1mode) { 2584 free(phase1mode->xfs); 2585 phase1mode->xfs = NULL; 2586 free(phase1mode->life); 2587 phase1mode->life = NULL; 2588 } 2589 if (phase2mode) { 2590 free(phase2mode->xfs); 2591 phase2mode->xfs = NULL; 2592 free(phase2mode->life); 2593 phase2mode->life = NULL; 2594 } 2595 if (srcid) 2596 free(srcid); 2597 if (dstid) 2598 free(dstid); 2599 return NULL; 2600 } 2601 2602 r->satype = satype; 2603 r->tmode = tmode; 2604 r->ikemode = mode; 2605 if (phase1mode) { 2606 r->p1xfs = phase1mode->xfs; 2607 r->p1life = phase1mode->life; 2608 r->p1ie = phase1mode->ike_exch; 2609 } else { 2610 r->p1ie = IKE_MM; 2611 } 2612 if (phase2mode) { 2613 r->p2xfs = phase2mode->xfs; 2614 r->p2life = phase2mode->life; 2615 r->p2ie = phase2mode->ike_exch; 2616 } else { 2617 r->p2ie = IKE_QM; 2618 } 2619 2620 r->auth = calloc(1, sizeof(struct ipsec_auth)); 2621 if (r->auth == NULL) 2622 err(1, "create_ike: calloc"); 2623 r->auth->srcid = srcid; 2624 r->auth->dstid = dstid; 2625 r->auth->srcid_type = get_id_type(srcid); 2626 r->auth->dstid_type = get_id_type(dstid); 2627 r->ikeauth = calloc(1, sizeof(struct ike_auth)); 2628 if (r->ikeauth == NULL) 2629 err(1, "create_ike: calloc"); 2630 r->ikeauth->type = authtype->type; 2631 r->ikeauth->string = authtype->string; 2632 r->tag = tag; 2633 2634 return (r); 2635} 2636