parse.y revision 1.169
1/* $OpenBSD: parse.y,v 1.169 2017/10/27 08:29:32 mpi 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 *, ...) 64 __attribute__((__format__ (printf, 1, 2))) 65 __attribute__((__nonnull__ (1))); 66int yywarn(const char *, ...) 67 __attribute__((__format__ (printf, 1, 2))) 68 __attribute__((__nonnull__ (1))); 69int kw_cmp(const void *, const void *); 70int lookup(char *); 71int lgetc(int); 72int lungetc(int); 73int findeol(void); 74 75TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead); 76struct sym { 77 TAILQ_ENTRY(sym) entry; 78 int used; 79 int persist; 80 char *nam; 81 char *val; 82}; 83int symset(const char *, const char *, int); 84char *symget(const char *); 85int cmdline_symset(char *); 86 87#define KEYSIZE_LIMIT 1024 88 89static struct ipsecctl *ipsec = NULL; 90static int debug = 0; 91 92const struct ipsec_xf authxfs[] = { 93 { "unknown", AUTHXF_UNKNOWN, 0, 0 }, 94 { "none", AUTHXF_NONE, 0, 0 }, 95 { "hmac-md5", AUTHXF_HMAC_MD5, 16, 0 }, 96 { "hmac-ripemd160", AUTHXF_HMAC_RIPEMD160, 20, 0 }, 97 { "hmac-sha1", AUTHXF_HMAC_SHA1, 20, 0 }, 98 { "hmac-sha2-256", AUTHXF_HMAC_SHA2_256, 32, 0 }, 99 { "hmac-sha2-384", AUTHXF_HMAC_SHA2_384, 48, 0 }, 100 { "hmac-sha2-512", AUTHXF_HMAC_SHA2_512, 64, 0 }, 101 { NULL, 0, 0, 0 }, 102}; 103 104const struct ipsec_xf encxfs[] = { 105 { "unknown", ENCXF_UNKNOWN, 0, 0, 0, 0 }, 106 { "none", ENCXF_NONE, 0, 0, 0, 0 }, 107 { "3des-cbc", ENCXF_3DES_CBC, 24, 24, 0, 0 }, 108 { "aes", ENCXF_AES, 16, 32, 0, 0 }, 109 { "aes-128", ENCXF_AES_128, 16, 16, 0, 0 }, 110 { "aes-192", ENCXF_AES_192, 24, 24, 0, 0 }, 111 { "aes-256", ENCXF_AES_256, 32, 32, 0, 0 }, 112 { "aesctr", ENCXF_AESCTR, 16+4, 32+4, 0, 1 }, 113 { "aes-128-ctr", ENCXF_AES_128_CTR, 16+4, 16+4, 0, 1 }, 114 { "aes-192-ctr", ENCXF_AES_192_CTR, 24+4, 24+4, 0, 1 }, 115 { "aes-256-ctr", ENCXF_AES_256_CTR, 32+4, 32+4, 0, 1 }, 116 { "aes-128-gcm", ENCXF_AES_128_GCM, 16+4, 16+4, 1, 1 }, 117 { "aes-192-gcm", ENCXF_AES_192_GCM, 24+4, 24+4, 1, 1 }, 118 { "aes-256-gcm", ENCXF_AES_256_GCM, 32+4, 32+4, 1, 1 }, 119 { "aes-128-gmac", ENCXF_AES_128_GMAC, 16+4, 16+4, 1, 1 }, 120 { "aes-192-gmac", ENCXF_AES_192_GMAC, 24+4, 24+4, 1, 1 }, 121 { "aes-256-gmac", ENCXF_AES_256_GMAC, 32+4, 32+4, 1, 1 }, 122 { "blowfish", ENCXF_BLOWFISH, 5, 56, 0, 0 }, 123 { "cast128", ENCXF_CAST128, 5, 16, 0, 0 }, 124 { "chacha20-poly1305", ENCXF_CHACHA20_POLY1305, 32+4, 32+4, 1, 1 }, 125 { "null", ENCXF_NULL, 0, 0, 0, 0 }, 126 { NULL, 0, 0, 0, 0, 0 }, 127}; 128 129const struct ipsec_xf compxfs[] = { 130 { "unknown", COMPXF_UNKNOWN, 0, 0 }, 131 { "deflate", COMPXF_DEFLATE, 0, 0 }, 132 { "lzs", COMPXF_LZS, 0, 0 }, 133 { NULL, 0, 0, 0 }, 134}; 135 136const struct ipsec_xf groupxfs[] = { 137 { "unknown", GROUPXF_UNKNOWN, 0, 0 }, 138 { "none", GROUPXF_NONE, 0, 0 }, 139 { "modp768", GROUPXF_1, 768, 0 }, 140 { "grp1", GROUPXF_1, 768, 0 }, 141 { "modp1024", GROUPXF_2, 1024, 0 }, 142 { "grp2", GROUPXF_2, 1024, 0 }, 143 { "modp1536", GROUPXF_5, 1536, 0 }, 144 { "grp5", GROUPXF_5, 1536, 0 }, 145 { "modp2048", GROUPXF_14, 2048, 0 }, 146 { "grp14", GROUPXF_14, 2048, 0 }, 147 { "modp3072", GROUPXF_15, 3072, 0 }, 148 { "grp15", GROUPXF_15, 3072, 0 }, 149 { "modp4096", GROUPXF_16, 4096, 0 }, 150 { "grp16", GROUPXF_16, 4096, 0 }, 151 { "modp6144", GROUPXF_17, 6144, 0 }, 152 { "grp17", GROUPXF_17, 6144, 0 }, 153 { "modp8192", GROUPXF_18, 8192, 0 }, 154 { "grp18", GROUPXF_18, 8192, 0 }, 155 { "ecp256", GROUPXF_19, 256, 0 }, 156 { "grp19", GROUPXF_19, 256, 0 }, 157 { "ecp384", GROUPXF_20, 384, 0 }, 158 { "grp20", GROUPXF_20, 384, 0 }, 159 { "ecp521", GROUPXF_21, 521, 0 }, 160 { "grp21", GROUPXF_21, 521, 0 }, 161 { "ecp192", GROUPXF_25, 192, 0 }, 162 { "grp25", GROUPXF_25, 192, 0 }, 163 { "ecp224", GROUPXF_26, 224, 0 }, 164 { "grp26", GROUPXF_26, 224, 0 }, 165 { "bp224", GROUPXF_27, 224, 0 }, 166 { "grp27", GROUPXF_27, 224, 0 }, 167 { "bp256", GROUPXF_28, 256, 0 }, 168 { "grp28", GROUPXF_28, 256, 0 }, 169 { "bp384", GROUPXF_29, 384, 0 }, 170 { "grp29", GROUPXF_29, 384, 0 }, 171 { "bp512", GROUPXF_30, 512, 0 }, 172 { "grp30", GROUPXF_30, 512, 0 }, 173 { NULL, 0, 0, 0 }, 174}; 175 176int atoul(char *, u_long *); 177int atospi(char *, u_int32_t *); 178u_int8_t x2i(unsigned char *); 179struct ipsec_key *parsekey(unsigned char *, size_t); 180struct ipsec_key *parsekeyfile(char *); 181struct ipsec_addr_wrap *host(const char *); 182struct ipsec_addr_wrap *host_v6(const char *, int); 183struct ipsec_addr_wrap *host_v4(const char *, int); 184struct ipsec_addr_wrap *host_dns(const char *, int); 185struct ipsec_addr_wrap *host_if(const char *, int); 186struct ipsec_addr_wrap *host_any(void); 187void ifa_load(void); 188int ifa_exists(const char *); 189struct ipsec_addr_wrap *ifa_lookup(const char *ifa_name); 190struct ipsec_addr_wrap *ifa_grouplookup(const char *); 191void set_ipmask(struct ipsec_addr_wrap *, u_int8_t); 192const struct ipsec_xf *parse_xf(const char *, const struct ipsec_xf *); 193struct ipsec_lifetime *parse_life(const char *); 194struct ipsec_transforms *copytransforms(const struct ipsec_transforms *); 195struct ipsec_lifetime *copylife(const struct ipsec_lifetime *); 196struct ipsec_auth *copyipsecauth(const struct ipsec_auth *); 197struct ike_auth *copyikeauth(const struct ike_auth *); 198struct ipsec_key *copykey(struct ipsec_key *); 199struct ipsec_addr_wrap *copyhost(const struct ipsec_addr_wrap *); 200char *copytag(const char *); 201struct ipsec_rule *copyrule(struct ipsec_rule *); 202int validate_af(struct ipsec_addr_wrap *, 203 struct ipsec_addr_wrap *); 204int validate_sa(u_int32_t, u_int8_t, 205 struct ipsec_transforms *, struct ipsec_key *, 206 struct ipsec_key *, u_int8_t); 207struct ipsec_rule *create_sa(u_int8_t, u_int8_t, struct ipsec_hosts *, 208 u_int32_t, struct ipsec_transforms *, 209 struct ipsec_key *, struct ipsec_key *); 210struct ipsec_rule *reverse_sa(struct ipsec_rule *, u_int32_t, 211 struct ipsec_key *, struct ipsec_key *); 212struct ipsec_rule *create_sabundle(struct ipsec_addr_wrap *, u_int8_t, 213 u_int32_t, struct ipsec_addr_wrap *, u_int8_t, 214 u_int32_t); 215struct ipsec_rule *create_flow(u_int8_t, u_int8_t, struct ipsec_hosts *, 216 u_int8_t, char *, char *, u_int8_t); 217int set_rule_peers(struct ipsec_rule *r, 218 struct ipsec_hosts *peers); 219void expand_any(struct ipsec_addr_wrap *); 220int expand_rule(struct ipsec_rule *, struct ipsec_hosts *, 221 u_int8_t, u_int32_t, struct ipsec_key *, 222 struct ipsec_key *, char *); 223struct ipsec_rule *reverse_rule(struct ipsec_rule *); 224struct ipsec_rule *create_ike(u_int8_t, struct ipsec_hosts *, 225 struct ike_mode *, struct ike_mode *, u_int8_t, 226 u_int8_t, u_int8_t, char *, char *, 227 struct ike_auth *, char *); 228int add_sabundle(struct ipsec_rule *, char *); 229int get_id_type(char *); 230 231struct ipsec_transforms *ipsec_transforms; 232 233typedef struct { 234 union { 235 int64_t number; 236 u_int8_t ikemode; 237 u_int8_t dir; 238 u_int8_t satype; /* encapsulating prococol */ 239 u_int8_t proto; /* encapsulated protocol */ 240 u_int8_t tmode; 241 char *string; 242 u_int16_t port; 243 struct ipsec_hosts hosts; 244 struct ipsec_hosts peers; 245 struct ipsec_addr_wrap *anyhost; 246 struct ipsec_addr_wrap *singlehost; 247 struct ipsec_addr_wrap *host; 248 struct { 249 char *srcid; 250 char *dstid; 251 } ids; 252 char *id; 253 u_int8_t type; 254 struct ike_auth ikeauth; 255 struct { 256 u_int32_t spiout; 257 u_int32_t spiin; 258 } spis; 259 struct { 260 struct ipsec_key *keyout; 261 struct ipsec_key *keyin; 262 } authkeys; 263 struct { 264 struct ipsec_key *keyout; 265 struct ipsec_key *keyin; 266 } enckeys; 267 struct { 268 struct ipsec_key *keyout; 269 struct ipsec_key *keyin; 270 } keys; 271 struct ipsec_transforms *transforms; 272 struct ipsec_lifetime *life; 273 struct ike_mode *mode; 274 } v; 275 int lineno; 276} YYSTYPE; 277 278%} 279 280%token FLOW FROM ESP AH IN PEER ON OUT TO SRCID DSTID RSA PSK TCPMD5 SPI 281%token AUTHKEY ENCKEY FILENAME AUTHXF ENCXF ERROR IKE MAIN QUICK AGGRESSIVE 282%token PASSIVE ACTIVE ANY IPIP IPCOMP COMPXF TUNNEL TRANSPORT DYNAMIC LIFETIME 283%token TYPE DENY BYPASS LOCAL PROTO USE ACQUIRE REQUIRE DONTACQ GROUP PORT TAG 284%token INCLUDE BUNDLE 285%token <v.string> STRING 286%token <v.number> NUMBER 287%type <v.string> string 288%type <v.dir> dir 289%type <v.satype> satype 290%type <v.proto> proto 291%type <v.number> protoval 292%type <v.tmode> tmode 293%type <v.hosts> hosts 294%type <v.port> port 295%type <v.number> portval 296%type <v.peers> peers 297%type <v.anyhost> anyhost 298%type <v.singlehost> singlehost 299%type <v.host> host host_list host_spec 300%type <v.ids> ids 301%type <v.id> id 302%type <v.spis> spispec 303%type <v.authkeys> authkeyspec 304%type <v.enckeys> enckeyspec 305%type <v.string> bundlestring 306%type <v.keys> keyspec 307%type <v.transforms> transforms 308%type <v.ikemode> ikemode 309%type <v.ikeauth> ikeauth 310%type <v.type> type 311%type <v.life> lifetime 312%type <v.mode> phase1mode phase2mode 313%type <v.string> tag 314%% 315 316grammar : /* empty */ 317 | grammar include '\n' 318 | grammar '\n' 319 | grammar ikerule '\n' 320 | grammar flowrule '\n' 321 | grammar sarule '\n' 322 | grammar tcpmd5rule '\n' 323 | grammar varset '\n' 324 | grammar error '\n' { file->errors++; } 325 ; 326 327comma : ',' 328 | /* empty */ 329 ; 330 331include : INCLUDE STRING { 332 struct file *nfile; 333 334 if ((nfile = pushfile($2, 0)) == NULL) { 335 yyerror("failed to include file %s", $2); 336 free($2); 337 YYERROR; 338 } 339 free($2); 340 341 file = nfile; 342 lungetc('\n'); 343 } 344 ; 345 346tcpmd5rule : TCPMD5 hosts spispec authkeyspec { 347 struct ipsec_rule *r; 348 349 r = create_sa(IPSEC_TCPMD5, IPSEC_TRANSPORT, &$2, 350 $3.spiout, NULL, $4.keyout, NULL); 351 if (r == NULL) 352 YYERROR; 353 354 if (expand_rule(r, NULL, 0, $3.spiin, $4.keyin, NULL, 355 NULL)) 356 errx(1, "tcpmd5rule: expand_rule"); 357 } 358 ; 359 360sarule : satype tmode hosts spispec transforms authkeyspec 361 enckeyspec bundlestring { 362 struct ipsec_rule *r; 363 364 r = create_sa($1, $2, &$3, $4.spiout, $5, $6.keyout, 365 $7.keyout); 366 if (r == NULL) 367 YYERROR; 368 369 if (expand_rule(r, NULL, 0, $4.spiin, $6.keyin, 370 $7.keyin, $8)) 371 errx(1, "sarule: expand_rule"); 372 } 373 ; 374 375flowrule : FLOW satype dir proto hosts peers ids type { 376 struct ipsec_rule *r; 377 378 r = create_flow($3, $4, &$5, $2, $7.srcid, 379 $7.dstid, $8); 380 if (r == NULL) 381 YYERROR; 382 383 if (expand_rule(r, &$6, $3, 0, NULL, NULL, NULL)) 384 errx(1, "flowrule: expand_rule"); 385 } 386 ; 387 388ikerule : IKE ikemode satype tmode proto hosts peers 389 phase1mode phase2mode ids ikeauth tag { 390 struct ipsec_rule *r; 391 392 r = create_ike($5, &$6, $8, $9, $3, $4, $2, 393 $10.srcid, $10.dstid, &$11, $12); 394 if (r == NULL) 395 YYERROR; 396 397 if (expand_rule(r, &$7, 0, 0, NULL, NULL, NULL)) 398 errx(1, "ikerule: expand_rule"); 399 } 400 ; 401 402satype : /* empty */ { $$ = IPSEC_ESP; } 403 | ESP { $$ = IPSEC_ESP; } 404 | AH { $$ = IPSEC_AH; } 405 | IPCOMP { $$ = IPSEC_IPCOMP; } 406 | IPIP { $$ = IPSEC_IPIP; } 407 ; 408 409proto : /* empty */ { $$ = 0; } 410 | PROTO protoval { $$ = $2; } 411 | PROTO ESP { $$ = IPPROTO_ESP; } 412 | PROTO AH { $$ = IPPROTO_AH; } 413 ; 414 415protoval : STRING { 416 struct protoent *p; 417 418 p = getprotobyname($1); 419 if (p == NULL) { 420 yyerror("unknown protocol: %s", $1); 421 YYERROR; 422 } 423 $$ = p->p_proto; 424 free($1); 425 } 426 | NUMBER { 427 if ($1 > 255 || $1 < 0) { 428 yyerror("protocol outside range"); 429 YYERROR; 430 } 431 } 432 ; 433 434tmode : /* empty */ { $$ = IPSEC_TUNNEL; } 435 | TUNNEL { $$ = IPSEC_TUNNEL; } 436 | TRANSPORT { $$ = IPSEC_TRANSPORT; } 437 ; 438 439dir : /* empty */ { $$ = IPSEC_INOUT; } 440 | IN { $$ = IPSEC_IN; } 441 | OUT { $$ = IPSEC_OUT; } 442 ; 443 444hosts : FROM host port TO host port { 445 struct ipsec_addr_wrap *ipa; 446 for (ipa = $5; ipa; ipa = ipa->next) { 447 if (ipa->srcnat) { 448 yyerror("no flow NAT support for" 449 " destination network: %s", ipa->name); 450 YYERROR; 451 } 452 } 453 $$.src = $2; 454 $$.sport = $3; 455 $$.dst = $5; 456 $$.dport = $6; 457 } 458 | TO host port FROM host port { 459 struct ipsec_addr_wrap *ipa; 460 for (ipa = $2; ipa; ipa = ipa->next) { 461 if (ipa->srcnat) { 462 yyerror("no flow NAT support for" 463 " destination network: %s", ipa->name); 464 YYERROR; 465 } 466 } 467 $$.src = $5; 468 $$.sport = $6; 469 $$.dst = $2; 470 $$.dport = $3; 471 } 472 ; 473 474port : /* empty */ { $$ = 0; } 475 | PORT portval { $$ = $2; } 476 ; 477 478portval : STRING { 479 struct servent *s; 480 481 if ((s = getservbyname($1, "tcp")) != NULL || 482 (s = getservbyname($1, "udp")) != NULL) { 483 $$ = s->s_port; 484 } else { 485 yyerror("unknown port: %s", $1); 486 YYERROR; 487 } 488 } 489 | NUMBER { 490 if ($1 > USHRT_MAX || $1 < 0) { 491 yyerror("port outside range"); 492 YYERROR; 493 } 494 $$ = htons($1); 495 } 496 ; 497 498peers : /* empty */ { 499 $$.dst = NULL; 500 $$.src = NULL; 501 } 502 | PEER anyhost LOCAL singlehost { 503 $$.dst = $2; 504 $$.src = $4; 505 } 506 | LOCAL singlehost PEER anyhost { 507 $$.dst = $4; 508 $$.src = $2; 509 } 510 | PEER anyhost { 511 $$.dst = $2; 512 $$.src = NULL; 513 } 514 | LOCAL singlehost { 515 $$.dst = NULL; 516 $$.src = $2; 517 } 518 ; 519 520anyhost : singlehost { $$ = $1; } 521 | ANY { 522 $$ = host_any(); 523 } 524 525singlehost : /* empty */ { $$ = NULL; } 526 | STRING { 527 if (($$ = host($1)) == NULL) { 528 free($1); 529 yyerror("could not parse host specification"); 530 YYERROR; 531 } 532 free($1); 533 } 534 ; 535 536host_list : host { $$ = $1; } 537 | host_list comma host { 538 if ($3 == NULL) 539 $$ = $1; 540 else if ($1 == NULL) 541 $$ = $3; 542 else { 543 $1->tail->next = $3; 544 $1->tail = $3->tail; 545 $$ = $1; 546 } 547 } 548 ; 549 550host_spec : STRING { 551 if (($$ = host($1)) == NULL) { 552 free($1); 553 yyerror("could not parse host specification"); 554 YYERROR; 555 } 556 free($1); 557 } 558 | STRING '/' NUMBER { 559 char *buf; 560 561 if (asprintf(&buf, "%s/%lld", $1, $3) == -1) 562 err(1, "host: asprintf"); 563 free($1); 564 if (($$ = host(buf)) == NULL) { 565 free(buf); 566 yyerror("could not parse host specification"); 567 YYERROR; 568 } 569 free(buf); 570 } 571 ; 572 573host : host_spec { $$ = $1; } 574 | host_spec '(' host_spec ')' { 575 if ($3->af != $1->af) { 576 yyerror("Flow NAT address family mismatch"); 577 YYERROR; 578 } 579 $$ = $1; 580 $$->srcnat = $3; 581 } 582 | ANY { 583 $$ = host_any(); 584 } 585 | '{' host_list '}' { $$ = $2; } 586 ; 587 588ids : /* empty */ { 589 $$.srcid = NULL; 590 $$.dstid = NULL; 591 } 592 | SRCID id DSTID id { 593 $$.srcid = $2; 594 $$.dstid = $4; 595 } 596 | SRCID id { 597 $$.srcid = $2; 598 $$.dstid = NULL; 599 } 600 | DSTID id { 601 $$.srcid = NULL; 602 $$.dstid = $2; 603 } 604 ; 605 606type : /* empty */ { 607 $$ = TYPE_UNKNOWN; 608 } 609 | TYPE USE { 610 $$ = TYPE_USE; 611 } 612 | TYPE ACQUIRE { 613 $$ = TYPE_ACQUIRE; 614 } 615 | TYPE REQUIRE { 616 $$ = TYPE_REQUIRE; 617 } 618 | TYPE DENY { 619 $$ = TYPE_DENY; 620 } 621 | TYPE BYPASS { 622 $$ = TYPE_BYPASS; 623 } 624 | TYPE DONTACQ { 625 $$ = TYPE_DONTACQ; 626 } 627 ; 628 629id : STRING { $$ = $1; } 630 ; 631 632spispec : SPI STRING { 633 u_int32_t spi; 634 char *p = strchr($2, ':'); 635 636 if (p != NULL) { 637 *p++ = 0; 638 639 if (atospi(p, &spi) == -1) { 640 free($2); 641 YYERROR; 642 } 643 $$.spiin = spi; 644 } else 645 $$.spiin = 0; 646 647 if (atospi($2, &spi) == -1) { 648 free($2); 649 YYERROR; 650 } 651 $$.spiout = spi; 652 653 654 free($2); 655 } 656 | SPI NUMBER { 657 if ($2 > UINT_MAX || $2 < 0) { 658 yyerror("%lld not a valid spi", $2); 659 YYERROR; 660 } 661 if ($2 >= SPI_RESERVED_MIN && $2 <= SPI_RESERVED_MAX) { 662 yyerror("%lld within reserved spi range", $2); 663 YYERROR; 664 } 665 666 $$.spiin = 0; 667 $$.spiout = $2; 668 } 669 ; 670 671transforms : { 672 if ((ipsec_transforms = calloc(1, 673 sizeof(struct ipsec_transforms))) == NULL) 674 err(1, "transforms: calloc"); 675 } 676 transforms_l 677 { $$ = ipsec_transforms; } 678 | /* empty */ { 679 if (($$ = calloc(1, 680 sizeof(struct ipsec_transforms))) == NULL) 681 err(1, "transforms: calloc"); 682 } 683 ; 684 685transforms_l : transforms_l transform 686 | transform 687 ; 688 689transform : AUTHXF STRING { 690 if (ipsec_transforms->authxf) 691 yyerror("auth already set"); 692 else { 693 ipsec_transforms->authxf = parse_xf($2, 694 authxfs); 695 if (!ipsec_transforms->authxf) 696 yyerror("%s not a valid transform", $2); 697 } 698 } 699 | ENCXF STRING { 700 if (ipsec_transforms->encxf) 701 yyerror("enc already set"); 702 else { 703 ipsec_transforms->encxf = parse_xf($2, encxfs); 704 if (!ipsec_transforms->encxf) 705 yyerror("%s not a valid transform", $2); 706 } 707 } 708 | COMPXF STRING { 709 if (ipsec_transforms->compxf) 710 yyerror("comp already set"); 711 else { 712 ipsec_transforms->compxf = parse_xf($2, 713 compxfs); 714 if (!ipsec_transforms->compxf) 715 yyerror("%s not a valid transform", $2); 716 } 717 } 718 | GROUP STRING { 719 if (ipsec_transforms->groupxf) 720 yyerror("group already set"); 721 else { 722 ipsec_transforms->groupxf = parse_xf($2, 723 groupxfs); 724 if (!ipsec_transforms->groupxf) 725 yyerror("%s not a valid transform", $2); 726 } 727 } 728 ; 729 730phase1mode : /* empty */ { 731 struct ike_mode *p1; 732 733 /* We create just an empty main mode */ 734 if ((p1 = calloc(1, sizeof(struct ike_mode))) == NULL) 735 err(1, "phase1mode: calloc"); 736 p1->ike_exch = IKE_MM; 737 $$ = p1; 738 } 739 | MAIN transforms lifetime { 740 struct ike_mode *p1; 741 742 if ((p1 = calloc(1, sizeof(struct ike_mode))) == NULL) 743 err(1, "phase1mode: calloc"); 744 p1->xfs = $2; 745 p1->life = $3; 746 p1->ike_exch = IKE_MM; 747 $$ = p1; 748 } 749 | AGGRESSIVE transforms lifetime { 750 struct ike_mode *p1; 751 752 if ((p1 = calloc(1, sizeof(struct ike_mode))) == NULL) 753 err(1, "phase1mode: calloc"); 754 p1->xfs = $2; 755 p1->life = $3; 756 p1->ike_exch = IKE_AM; 757 $$ = p1; 758 } 759 ; 760 761phase2mode : /* empty */ { 762 struct ike_mode *p2; 763 764 /* We create just an empty quick mode */ 765 if ((p2 = calloc(1, sizeof(struct ike_mode))) == NULL) 766 err(1, "phase2mode: calloc"); 767 p2->ike_exch = IKE_QM; 768 $$ = p2; 769 } 770 | QUICK transforms lifetime { 771 struct ike_mode *p2; 772 773 if ((p2 = calloc(1, sizeof(struct ike_mode))) == NULL) 774 err(1, "phase2mode: calloc"); 775 p2->xfs = $2; 776 p2->life = $3; 777 p2->ike_exch = IKE_QM; 778 $$ = p2; 779 } 780 ; 781 782lifetime : /* empty */ { 783 struct ipsec_lifetime *life; 784 785 /* We create just an empty transform */ 786 if ((life = calloc(1, sizeof(struct ipsec_lifetime))) 787 == NULL) 788 err(1, "life: calloc"); 789 life->lt_seconds = -1; 790 life->lt_bytes = -1; 791 $$ = life; 792 } 793 | LIFETIME NUMBER { 794 struct ipsec_lifetime *life; 795 796 if ((life = calloc(1, sizeof(struct ipsec_lifetime))) 797 == NULL) 798 err(1, "life: calloc"); 799 life->lt_seconds = $2; 800 life->lt_bytes = -1; 801 $$ = life; 802 } 803 | LIFETIME STRING { 804 $$ = parse_life($2); 805 } 806 ; 807 808authkeyspec : /* empty */ { 809 $$.keyout = NULL; 810 $$.keyin = NULL; 811 } 812 | AUTHKEY keyspec { 813 $$.keyout = $2.keyout; 814 $$.keyin = $2.keyin; 815 } 816 ; 817 818enckeyspec : /* empty */ { 819 $$.keyout = NULL; 820 $$.keyin = NULL; 821 } 822 | ENCKEY keyspec { 823 $$.keyout = $2.keyout; 824 $$.keyin = $2.keyin; 825 } 826 ; 827 828bundlestring : /* empty */ { $$ = NULL; } 829 | BUNDLE STRING { $$ = $2; } 830 ; 831 832keyspec : STRING { 833 unsigned char *hex; 834 unsigned char *p = strchr($1, ':'); 835 836 if (p != NULL ) { 837 *p++ = 0; 838 839 if (!strncmp(p, "0x", 2)) 840 p += 2; 841 $$.keyin = parsekey(p, strlen(p)); 842 } else 843 $$.keyin = NULL; 844 845 hex = $1; 846 if (!strncmp(hex, "0x", 2)) 847 hex += 2; 848 $$.keyout = parsekey(hex, strlen(hex)); 849 850 free($1); 851 } 852 | FILENAME STRING { 853 unsigned char *p = strchr($2, ':'); 854 855 if (p != NULL) { 856 *p++ = 0; 857 $$.keyin = parsekeyfile(p); 858 } 859 $$.keyout = parsekeyfile($2); 860 free($2); 861 } 862 ; 863 864ikemode : /* empty */ { $$ = IKE_ACTIVE; } 865 | PASSIVE { $$ = IKE_PASSIVE; } 866 | DYNAMIC { $$ = IKE_DYNAMIC; } 867 | ACTIVE { $$ = IKE_ACTIVE; } 868 ; 869 870ikeauth : /* empty */ { 871 $$.type = IKE_AUTH_RSA; 872 $$.string = NULL; 873 } 874 | RSA { 875 $$.type = IKE_AUTH_RSA; 876 $$.string = NULL; 877 } 878 | PSK STRING { 879 $$.type = IKE_AUTH_PSK; 880 if (($$.string = strdup($2)) == NULL) 881 err(1, "ikeauth: strdup"); 882 } 883 ; 884 885tag : /* empty */ 886 { 887 $$ = NULL; 888 } 889 | TAG STRING 890 { 891 $$ = $2; 892 } 893 ; 894 895string : string STRING 896 { 897 if (asprintf(&$$, "%s %s", $1, $2) == -1) 898 err(1, "string: asprintf"); 899 free($1); 900 free($2); 901 } 902 | STRING 903 ; 904 905varset : STRING '=' string 906 { 907 char *s = $1; 908 if (ipsec->opts & IPSECCTL_OPT_VERBOSE) 909 printf("%s = \"%s\"\n", $1, $3); 910 while (*s++) { 911 if (isspace((unsigned char)*s)) { 912 yyerror("macro name cannot contain " 913 "whitespace"); 914 YYERROR; 915 } 916 } 917 if (symset($1, $3, 0) == -1) 918 err(1, "cannot store variable"); 919 free($1); 920 free($3); 921 } 922 ; 923 924%% 925 926struct keywords { 927 const char *k_name; 928 int k_val; 929}; 930 931int 932yyerror(const char *fmt, ...) 933{ 934 va_list ap; 935 936 file->errors++; 937 va_start(ap, fmt); 938 fprintf(stderr, "%s: %d: ", file->name, yylval.lineno); 939 vfprintf(stderr, fmt, ap); 940 fprintf(stderr, "\n"); 941 va_end(ap); 942 return (0); 943} 944 945int 946yywarn(const char *fmt, ...) 947{ 948 va_list ap; 949 950 va_start(ap, fmt); 951 fprintf(stderr, "%s: %d: ", file->name, yylval.lineno); 952 vfprintf(stderr, fmt, ap); 953 fprintf(stderr, "\n"); 954 va_end(ap); 955 return (0); 956} 957 958int 959kw_cmp(const void *k, const void *e) 960{ 961 return (strcmp(k, ((const struct keywords *)e)->k_name)); 962} 963 964int 965lookup(char *s) 966{ 967 /* this has to be sorted always */ 968 static const struct keywords keywords[] = { 969 { "acquire", ACQUIRE }, 970 { "active", ACTIVE }, 971 { "aggressive", AGGRESSIVE }, 972 { "ah", AH }, 973 { "any", ANY }, 974 { "auth", AUTHXF }, 975 { "authkey", AUTHKEY }, 976 { "bundle", BUNDLE }, 977 { "bypass", BYPASS }, 978 { "comp", COMPXF }, 979 { "deny", DENY }, 980 { "dontacq", DONTACQ }, 981 { "dstid", DSTID }, 982 { "dynamic", DYNAMIC }, 983 { "enc", ENCXF }, 984 { "enckey", ENCKEY }, 985 { "esp", ESP }, 986 { "file", FILENAME }, 987 { "flow", FLOW }, 988 { "from", FROM }, 989 { "group", GROUP }, 990 { "ike", IKE }, 991 { "in", IN }, 992 { "include", INCLUDE }, 993 { "ipcomp", IPCOMP }, 994 { "ipip", IPIP }, 995 { "lifetime", LIFETIME }, 996 { "local", LOCAL }, 997 { "main", MAIN }, 998 { "out", OUT }, 999 { "passive", PASSIVE }, 1000 { "peer", PEER }, 1001 { "port", PORT }, 1002 { "proto", PROTO }, 1003 { "psk", PSK }, 1004 { "quick", QUICK }, 1005 { "require", REQUIRE }, 1006 { "rsa", RSA }, 1007 { "spi", SPI }, 1008 { "srcid", SRCID }, 1009 { "tag", TAG }, 1010 { "tcpmd5", TCPMD5 }, 1011 { "to", TO }, 1012 { "transport", TRANSPORT }, 1013 { "tunnel", TUNNEL }, 1014 { "type", TYPE }, 1015 { "use", USE } 1016 }; 1017 const struct keywords *p; 1018 1019 p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]), 1020 sizeof(keywords[0]), kw_cmp); 1021 1022 if (p) { 1023 if (debug > 1) 1024 fprintf(stderr, "%s: %d\n", s, p->k_val); 1025 return (p->k_val); 1026 } else { 1027 if (debug > 1) 1028 fprintf(stderr, "string: %s\n", s); 1029 return (STRING); 1030 } 1031} 1032 1033#define MAXPUSHBACK 128 1034 1035u_char *parsebuf; 1036int parseindex; 1037u_char pushback_buffer[MAXPUSHBACK]; 1038int pushback_index = 0; 1039 1040int 1041lgetc(int quotec) 1042{ 1043 int c, next; 1044 1045 if (parsebuf) { 1046 /* Read character from the parsebuffer instead of input. */ 1047 if (parseindex >= 0) { 1048 c = parsebuf[parseindex++]; 1049 if (c != '\0') 1050 return (c); 1051 parsebuf = NULL; 1052 } else 1053 parseindex++; 1054 } 1055 1056 if (pushback_index) 1057 return (pushback_buffer[--pushback_index]); 1058 1059 if (quotec) { 1060 if ((c = getc(file->stream)) == EOF) { 1061 yyerror("reached end of file while parsing quoted string"); 1062 if (popfile() == EOF) 1063 return (EOF); 1064 return (quotec); 1065 } 1066 return (c); 1067 } 1068 1069 while ((c = getc(file->stream)) == '\\') { 1070 next = getc(file->stream); 1071 if (next != '\n') { 1072 c = next; 1073 break; 1074 } 1075 yylval.lineno = file->lineno; 1076 file->lineno++; 1077 } 1078 1079 while (c == EOF) { 1080 if (popfile() == EOF) 1081 return (EOF); 1082 c = getc(file->stream); 1083 } 1084 return (c); 1085} 1086 1087int 1088lungetc(int c) 1089{ 1090 if (c == EOF) 1091 return (EOF); 1092 if (parsebuf) { 1093 parseindex--; 1094 if (parseindex >= 0) 1095 return (c); 1096 } 1097 if (pushback_index < MAXPUSHBACK-1) 1098 return (pushback_buffer[pushback_index++] = c); 1099 else 1100 return (EOF); 1101} 1102 1103int 1104findeol(void) 1105{ 1106 int c; 1107 1108 parsebuf = NULL; 1109 1110 /* skip to either EOF or the first real EOL */ 1111 while (1) { 1112 if (pushback_index) 1113 c = pushback_buffer[--pushback_index]; 1114 else 1115 c = lgetc(0); 1116 if (c == '\n') { 1117 file->lineno++; 1118 break; 1119 } 1120 if (c == EOF) 1121 break; 1122 } 1123 return (ERROR); 1124} 1125 1126int 1127yylex(void) 1128{ 1129 u_char buf[8096]; 1130 u_char *p, *val; 1131 int quotec, next, c; 1132 int token; 1133 1134top: 1135 p = buf; 1136 while ((c = lgetc(0)) == ' ' || c == '\t') 1137 ; /* nothing */ 1138 1139 yylval.lineno = file->lineno; 1140 if (c == '#') 1141 while ((c = lgetc(0)) != '\n' && c != EOF) 1142 ; /* nothing */ 1143 if (c == '$' && parsebuf == NULL) { 1144 while (1) { 1145 if ((c = lgetc(0)) == EOF) 1146 return (0); 1147 1148 if (p + 1 >= buf + sizeof(buf) - 1) { 1149 yyerror("string too long"); 1150 return (findeol()); 1151 } 1152 if (isalnum(c) || c == '_') { 1153 *p++ = c; 1154 continue; 1155 } 1156 *p = '\0'; 1157 lungetc(c); 1158 break; 1159 } 1160 val = symget(buf); 1161 if (val == NULL) { 1162 yyerror("macro '%s' not defined", buf); 1163 return (findeol()); 1164 } 1165 parsebuf = val; 1166 parseindex = 0; 1167 goto top; 1168 } 1169 1170 switch (c) { 1171 case '\'': 1172 case '"': 1173 quotec = c; 1174 while (1) { 1175 if ((c = lgetc(quotec)) == EOF) 1176 return (0); 1177 if (c == '\n') { 1178 file->lineno++; 1179 continue; 1180 } else if (c == '\\') { 1181 if ((next = lgetc(quotec)) == EOF) 1182 return (0); 1183 if (next == quotec || c == ' ' || c == '\t') 1184 c = next; 1185 else if (next == '\n') { 1186 file->lineno++; 1187 continue; 1188 } else 1189 lungetc(next); 1190 } else if (c == quotec) { 1191 *p = '\0'; 1192 break; 1193 } else if (c == '\0') { 1194 yyerror("syntax error"); 1195 return (findeol()); 1196 } 1197 if (p + 1 >= buf + sizeof(buf) - 1) { 1198 yyerror("string too long"); 1199 return (findeol()); 1200 } 1201 *p++ = c; 1202 } 1203 yylval.v.string = strdup(buf); 1204 if (yylval.v.string == NULL) 1205 err(1, "yylex: strdup"); 1206 return (STRING); 1207 } 1208 1209#define allowed_to_end_number(x) \ 1210 (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=') 1211 1212 if (c == '-' || isdigit(c)) { 1213 do { 1214 *p++ = c; 1215 if ((unsigned)(p-buf) >= sizeof(buf)) { 1216 yyerror("string too long"); 1217 return (findeol()); 1218 } 1219 } while ((c = lgetc(0)) != EOF && isdigit(c)); 1220 lungetc(c); 1221 if (p == buf + 1 && buf[0] == '-') 1222 goto nodigits; 1223 if (c == EOF || allowed_to_end_number(c)) { 1224 const char *errstr = NULL; 1225 1226 *p = '\0'; 1227 yylval.v.number = strtonum(buf, LLONG_MIN, 1228 LLONG_MAX, &errstr); 1229 if (errstr) { 1230 yyerror("\"%s\" invalid number: %s", 1231 buf, errstr); 1232 return (findeol()); 1233 } 1234 return (NUMBER); 1235 } else { 1236nodigits: 1237 while (p > buf + 1) 1238 lungetc(*--p); 1239 c = *--p; 1240 if (c == '-') 1241 return (c); 1242 } 1243 } 1244 1245#define allowed_in_string(x) \ 1246 (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \ 1247 x != '{' && x != '}' && x != '<' && x != '>' && \ 1248 x != '!' && x != '=' && x != '/' && x != '#' && \ 1249 x != ',')) 1250 1251 if (isalnum(c) || c == ':' || c == '_' || c == '*') { 1252 do { 1253 *p++ = c; 1254 if ((unsigned)(p-buf) >= sizeof(buf)) { 1255 yyerror("string too long"); 1256 return (findeol()); 1257 } 1258 } while ((c = lgetc(0)) != EOF && (allowed_in_string(c))); 1259 lungetc(c); 1260 *p = '\0'; 1261 if ((token = lookup(buf)) == STRING) 1262 if ((yylval.v.string = strdup(buf)) == NULL) 1263 err(1, "yylex: strdup"); 1264 return (token); 1265 } 1266 if (c == '\n') { 1267 yylval.lineno = file->lineno; 1268 file->lineno++; 1269 } 1270 if (c == EOF) 1271 return (0); 1272 return (c); 1273} 1274 1275int 1276check_file_secrecy(int fd, const char *fname) 1277{ 1278 struct stat st; 1279 1280 if (fstat(fd, &st)) { 1281 warn("cannot stat %s", fname); 1282 return (-1); 1283 } 1284 if (st.st_uid != 0 && st.st_uid != getuid()) { 1285 warnx("%s: owner not root or current user", fname); 1286 return (-1); 1287 } 1288 if (st.st_mode & (S_IWGRP | S_IXGRP | S_IRWXO)) { 1289 warnx("%s: group writable or world read/writable", fname); 1290 return (-1); 1291 } 1292 return (0); 1293} 1294 1295struct file * 1296pushfile(const char *name, int secret) 1297{ 1298 struct file *nfile; 1299 1300 if ((nfile = calloc(1, sizeof(struct file))) == NULL) { 1301 warn("malloc"); 1302 return (NULL); 1303 } 1304 if ((nfile->name = strdup(name)) == NULL) { 1305 warn("malloc"); 1306 free(nfile); 1307 return (NULL); 1308 } 1309 if (TAILQ_FIRST(&files) == NULL && strcmp(nfile->name, "-") == 0) { 1310 nfile->stream = stdin; 1311 free(nfile->name); 1312 if ((nfile->name = strdup("stdin")) == NULL) { 1313 warn("strdup"); 1314 free(nfile); 1315 return (NULL); 1316 } 1317 } else if ((nfile->stream = fopen(nfile->name, "r")) == NULL) { 1318 warn("%s", nfile->name); 1319 free(nfile->name); 1320 free(nfile); 1321 return (NULL); 1322 } else if (secret && 1323 check_file_secrecy(fileno(nfile->stream), nfile->name)) { 1324 fclose(nfile->stream); 1325 free(nfile->name); 1326 free(nfile); 1327 return (NULL); 1328 } 1329 nfile->lineno = 1; 1330 TAILQ_INSERT_TAIL(&files, nfile, entry); 1331 return (nfile); 1332} 1333 1334int 1335popfile(void) 1336{ 1337 struct file *prev; 1338 1339 if ((prev = TAILQ_PREV(file, files, entry)) != NULL) { 1340 prev->errors += file->errors; 1341 TAILQ_REMOVE(&files, file, entry); 1342 fclose(file->stream); 1343 free(file->name); 1344 free(file); 1345 file = prev; 1346 return (0); 1347 } 1348 return (EOF); 1349} 1350 1351int 1352parse_rules(const char *filename, struct ipsecctl *ipsecx) 1353{ 1354 struct sym *sym; 1355 int errors = 0; 1356 1357 ipsec = ipsecx; 1358 1359 if ((file = pushfile(filename, 1)) == NULL) { 1360 return (-1); 1361 } 1362 1363 yyparse(); 1364 errors = file->errors; 1365 popfile(); 1366 1367 /* Free macros and check which have not been used. */ 1368 while ((sym = TAILQ_FIRST(&symhead))) { 1369 if ((ipsec->opts & IPSECCTL_OPT_VERBOSE2) && !sym->used) 1370 fprintf(stderr, "warning: macro '%s' not " 1371 "used\n", sym->nam); 1372 free(sym->nam); 1373 free(sym->val); 1374 TAILQ_REMOVE(&symhead, sym, entry); 1375 free(sym); 1376 } 1377 1378 return (errors ? -1 : 0); 1379} 1380 1381int 1382symset(const char *nam, const char *val, int persist) 1383{ 1384 struct sym *sym; 1385 1386 TAILQ_FOREACH(sym, &symhead, entry) { 1387 if (strcmp(nam, sym->nam) == 0) 1388 break; 1389 } 1390 1391 if (sym != NULL) { 1392 if (sym->persist == 1) 1393 return (0); 1394 else { 1395 free(sym->nam); 1396 free(sym->val); 1397 TAILQ_REMOVE(&symhead, sym, entry); 1398 free(sym); 1399 } 1400 } 1401 if ((sym = calloc(1, sizeof(*sym))) == NULL) 1402 return (-1); 1403 1404 sym->nam = strdup(nam); 1405 if (sym->nam == NULL) { 1406 free(sym); 1407 return (-1); 1408 } 1409 sym->val = strdup(val); 1410 if (sym->val == NULL) { 1411 free(sym->nam); 1412 free(sym); 1413 return (-1); 1414 } 1415 sym->used = 0; 1416 sym->persist = persist; 1417 TAILQ_INSERT_TAIL(&symhead, sym, entry); 1418 return (0); 1419} 1420 1421int 1422cmdline_symset(char *s) 1423{ 1424 char *sym, *val; 1425 int ret; 1426 size_t len; 1427 1428 if ((val = strrchr(s, '=')) == NULL) 1429 return (-1); 1430 1431 len = strlen(s) - strlen(val) + 1; 1432 if ((sym = malloc(len)) == NULL) 1433 err(1, "cmdline_symset: malloc"); 1434 1435 strlcpy(sym, s, len); 1436 1437 ret = symset(sym, val + 1, 1); 1438 free(sym); 1439 1440 return (ret); 1441} 1442 1443char * 1444symget(const char *nam) 1445{ 1446 struct sym *sym; 1447 1448 TAILQ_FOREACH(sym, &symhead, entry) { 1449 if (strcmp(nam, sym->nam) == 0) { 1450 sym->used = 1; 1451 return (sym->val); 1452 } 1453 } 1454 return (NULL); 1455} 1456 1457int 1458atoul(char *s, u_long *ulvalp) 1459{ 1460 u_long ulval; 1461 char *ep; 1462 1463 errno = 0; 1464 ulval = strtoul(s, &ep, 0); 1465 if (s[0] == '\0' || *ep != '\0') 1466 return (-1); 1467 if (errno == ERANGE && ulval == ULONG_MAX) 1468 return (-1); 1469 *ulvalp = ulval; 1470 return (0); 1471} 1472 1473int 1474atospi(char *s, u_int32_t *spivalp) 1475{ 1476 unsigned long ulval; 1477 1478 if (atoul(s, &ulval) == -1) 1479 return (-1); 1480 if (ulval > UINT_MAX) { 1481 yyerror("%lu not a valid spi", ulval); 1482 return (-1); 1483 } 1484 if (ulval >= SPI_RESERVED_MIN && ulval <= SPI_RESERVED_MAX) { 1485 yyerror("%lu within reserved spi range", ulval); 1486 return (-1); 1487 } 1488 *spivalp = ulval; 1489 return (0); 1490} 1491 1492u_int8_t 1493x2i(unsigned char *s) 1494{ 1495 char ss[3]; 1496 1497 ss[0] = s[0]; 1498 ss[1] = s[1]; 1499 ss[2] = 0; 1500 1501 if (!isxdigit(s[0]) || !isxdigit(s[1])) { 1502 yyerror("keys need to be specified in hex digits"); 1503 return (-1); 1504 } 1505 return ((u_int8_t)strtoul(ss, NULL, 16)); 1506} 1507 1508struct ipsec_key * 1509parsekey(unsigned char *hexkey, size_t len) 1510{ 1511 struct ipsec_key *key; 1512 int i; 1513 1514 key = calloc(1, sizeof(struct ipsec_key)); 1515 if (key == NULL) 1516 err(1, "parsekey: calloc"); 1517 1518 key->len = len / 2; 1519 key->data = calloc(key->len, sizeof(u_int8_t)); 1520 if (key->data == NULL) 1521 err(1, "parsekey: calloc"); 1522 1523 for (i = 0; i < (int)key->len; i++) 1524 key->data[i] = x2i(hexkey + 2 * i); 1525 1526 return (key); 1527} 1528 1529struct ipsec_key * 1530parsekeyfile(char *filename) 1531{ 1532 struct stat sb; 1533 int fd; 1534 unsigned char *hex; 1535 1536 if ((fd = open(filename, O_RDONLY)) < 0) 1537 err(1, "open %s", filename); 1538 if (fstat(fd, &sb) < 0) 1539 err(1, "parsekeyfile: stat %s", filename); 1540 if ((sb.st_size > KEYSIZE_LIMIT) || (sb.st_size == 0)) 1541 errx(1, "%s: key too %s", filename, sb.st_size ? "large" : 1542 "small"); 1543 if ((hex = calloc(sb.st_size, sizeof(unsigned char))) == NULL) 1544 err(1, "parsekeyfile: calloc"); 1545 if (read(fd, hex, sb.st_size) < sb.st_size) 1546 err(1, "parsekeyfile: read"); 1547 close(fd); 1548 return (parsekey(hex, sb.st_size)); 1549} 1550 1551int 1552get_id_type(char *string) 1553{ 1554 struct in6_addr ia; 1555 1556 if (string == NULL) 1557 return (ID_UNKNOWN); 1558 1559 if (inet_pton(AF_INET, string, &ia) == 1) 1560 return (ID_IPV4); 1561 else if (inet_pton(AF_INET6, string, &ia) == 1) 1562 return (ID_IPV6); 1563 else if (strchr(string, '@')) 1564 return (ID_UFQDN); 1565 else 1566 return (ID_FQDN); 1567} 1568 1569struct ipsec_addr_wrap * 1570host(const char *s) 1571{ 1572 struct ipsec_addr_wrap *ipa = NULL; 1573 int mask, cont = 1; 1574 char *p, *q, *ps; 1575 1576 if ((p = strrchr(s, '/')) != NULL) { 1577 errno = 0; 1578 mask = strtol(p + 1, &q, 0); 1579 if (errno == ERANGE || !q || *q || mask > 128 || q == (p + 1)) 1580 errx(1, "host: invalid netmask '%s'", p); 1581 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL) 1582 err(1, "host: calloc"); 1583 strlcpy(ps, s, strlen(s) - strlen(p) + 1); 1584 } else { 1585 if ((ps = strdup(s)) == NULL) 1586 err(1, "host: strdup"); 1587 mask = -1; 1588 } 1589 1590 /* Does interface with this name exist? */ 1591 if (cont && (ipa = host_if(ps, mask)) != NULL) 1592 cont = 0; 1593 1594 /* IPv4 address? */ 1595 if (cont && (ipa = host_v4(s, mask == -1 ? 32 : mask)) != NULL) 1596 cont = 0; 1597 1598 /* IPv6 address? */ 1599 if (cont && (ipa = host_v6(ps, mask == -1 ? 128 : mask)) != NULL) 1600 cont = 0; 1601 1602 /* dns lookup */ 1603 if (cont && mask == -1 && (ipa = host_dns(s, mask)) != NULL) 1604 cont = 0; 1605 free(ps); 1606 1607 if (ipa == NULL || cont == 1) { 1608 fprintf(stderr, "no IP address found for %s\n", s); 1609 return (NULL); 1610 } 1611 return (ipa); 1612} 1613 1614struct ipsec_addr_wrap * 1615host_v6(const char *s, int prefixlen) 1616{ 1617 struct ipsec_addr_wrap *ipa = NULL; 1618 struct addrinfo hints, *res; 1619 char hbuf[NI_MAXHOST]; 1620 1621 bzero(&hints, sizeof(struct addrinfo)); 1622 hints.ai_family = AF_INET6; 1623 hints.ai_socktype = SOCK_STREAM; 1624 hints.ai_flags = AI_NUMERICHOST; 1625 if (getaddrinfo(s, NULL, &hints, &res)) 1626 return (NULL); 1627 if (res->ai_next) 1628 err(1, "host_v6: numeric hostname expanded to multiple item"); 1629 1630 ipa = calloc(1, sizeof(struct ipsec_addr_wrap)); 1631 if (ipa == NULL) 1632 err(1, "host_v6: calloc"); 1633 ipa->af = res->ai_family; 1634 memcpy(&ipa->address.v6, 1635 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 1636 sizeof(struct in6_addr)); 1637 if (prefixlen > 128) 1638 prefixlen = 128; 1639 ipa->next = NULL; 1640 ipa->tail = ipa; 1641 1642 set_ipmask(ipa, prefixlen); 1643 if (getnameinfo(res->ai_addr, res->ai_addrlen, 1644 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST)) { 1645 errx(1, "could not get a numeric hostname"); 1646 } 1647 1648 if (prefixlen != 128) { 1649 ipa->netaddress = 1; 1650 if (asprintf(&ipa->name, "%s/%d", hbuf, prefixlen) == -1) 1651 err(1, "host_v6: asprintf"); 1652 } else { 1653 if ((ipa->name = strdup(hbuf)) == NULL) 1654 err(1, "host_v6: strdup"); 1655 } 1656 1657 freeaddrinfo(res); 1658 1659 return (ipa); 1660} 1661 1662struct ipsec_addr_wrap * 1663host_v4(const char *s, int mask) 1664{ 1665 struct ipsec_addr_wrap *ipa = NULL; 1666 struct in_addr ina; 1667 int bits = 32; 1668 1669 bzero(&ina, sizeof(struct in_addr)); 1670 if (strrchr(s, '/') != NULL) { 1671 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1) 1672 return (NULL); 1673 } else { 1674 if (inet_pton(AF_INET, s, &ina) != 1) 1675 return (NULL); 1676 } 1677 1678 ipa = calloc(1, sizeof(struct ipsec_addr_wrap)); 1679 if (ipa == NULL) 1680 err(1, "host_v4: calloc"); 1681 1682 ipa->address.v4 = ina; 1683 ipa->name = strdup(s); 1684 if (ipa->name == NULL) 1685 err(1, "host_v4: strdup"); 1686 ipa->af = AF_INET; 1687 ipa->next = NULL; 1688 ipa->tail = ipa; 1689 1690 set_ipmask(ipa, bits); 1691 if (strrchr(s, '/') != NULL) 1692 ipa->netaddress = 1; 1693 1694 return (ipa); 1695} 1696 1697struct ipsec_addr_wrap * 1698host_dns(const char *s, int mask) 1699{ 1700 struct ipsec_addr_wrap *ipa = NULL, *head = NULL; 1701 struct addrinfo hints, *res0, *res; 1702 int error; 1703 char hbuf[NI_MAXHOST]; 1704 1705 bzero(&hints, sizeof(struct addrinfo)); 1706 hints.ai_family = PF_UNSPEC; 1707 hints.ai_socktype = SOCK_STREAM; 1708 error = getaddrinfo(s, NULL, &hints, &res0); 1709 if (error) 1710 return (NULL); 1711 1712 for (res = res0; res; res = res->ai_next) { 1713 if (res->ai_family != AF_INET && res->ai_family != AF_INET6) 1714 continue; 1715 1716 ipa = calloc(1, sizeof(struct ipsec_addr_wrap)); 1717 if (ipa == NULL) 1718 err(1, "host_dns: calloc"); 1719 switch (res->ai_family) { 1720 case AF_INET: 1721 memcpy(&ipa->address.v4, 1722 &((struct sockaddr_in *)res->ai_addr)->sin_addr, 1723 sizeof(struct in_addr)); 1724 break; 1725 case AF_INET6: 1726 /* XXX we do not support scoped IPv6 address yet */ 1727 if (((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id) { 1728 free(ipa); 1729 continue; 1730 } 1731 memcpy(&ipa->address.v6, 1732 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 1733 sizeof(struct in6_addr)); 1734 break; 1735 } 1736 error = getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, 1737 sizeof(hbuf), NULL, 0, NI_NUMERICHOST); 1738 if (error) 1739 err(1, "host_dns: getnameinfo"); 1740 ipa->name = strdup(hbuf); 1741 if (ipa->name == NULL) 1742 err(1, "host_dns: strdup"); 1743 ipa->af = res->ai_family; 1744 ipa->next = NULL; 1745 ipa->tail = ipa; 1746 if (head == NULL) 1747 head = ipa; 1748 else { 1749 head->tail->next = ipa; 1750 head->tail = ipa; 1751 } 1752 1753 /* 1754 * XXX for now, no netmask support for IPv6. 1755 * but since there's no way to specify address family, once you 1756 * have IPv6 address on a host, you cannot use dns/netmask 1757 * syntax. 1758 */ 1759 if (ipa->af == AF_INET) 1760 set_ipmask(ipa, mask == -1 ? 32 : mask); 1761 else 1762 if (mask != -1) 1763 err(1, "host_dns: cannot apply netmask " 1764 "on non-IPv4 address"); 1765 } 1766 freeaddrinfo(res0); 1767 1768 return (head); 1769} 1770 1771struct ipsec_addr_wrap * 1772host_if(const char *s, int mask) 1773{ 1774 struct ipsec_addr_wrap *ipa = NULL; 1775 1776 if (ifa_exists(s)) 1777 ipa = ifa_lookup(s); 1778 1779 return (ipa); 1780} 1781 1782struct ipsec_addr_wrap * 1783host_any(void) 1784{ 1785 struct ipsec_addr_wrap *ipa; 1786 1787 ipa = calloc(1, sizeof(struct ipsec_addr_wrap)); 1788 if (ipa == NULL) 1789 err(1, "host_any: calloc"); 1790 ipa->af = AF_UNSPEC; 1791 ipa->netaddress = 1; 1792 ipa->tail = ipa; 1793 return (ipa); 1794} 1795 1796/* interface lookup routintes */ 1797 1798struct ipsec_addr_wrap *iftab; 1799 1800void 1801ifa_load(void) 1802{ 1803 struct ifaddrs *ifap, *ifa; 1804 struct ipsec_addr_wrap *n = NULL, *h = NULL; 1805 1806 if (getifaddrs(&ifap) < 0) 1807 err(1, "ifa_load: getifaddrs"); 1808 1809 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 1810 if (!(ifa->ifa_addr->sa_family == AF_INET || 1811 ifa->ifa_addr->sa_family == AF_INET6 || 1812 ifa->ifa_addr->sa_family == AF_LINK)) 1813 continue; 1814 n = calloc(1, sizeof(struct ipsec_addr_wrap)); 1815 if (n == NULL) 1816 err(1, "ifa_load: calloc"); 1817 n->af = ifa->ifa_addr->sa_family; 1818 if ((n->name = strdup(ifa->ifa_name)) == NULL) 1819 err(1, "ifa_load: strdup"); 1820 if (n->af == AF_INET) { 1821 n->af = AF_INET; 1822 memcpy(&n->address.v4, &((struct sockaddr_in *) 1823 ifa->ifa_addr)->sin_addr, 1824 sizeof(struct in_addr)); 1825 memcpy(&n->mask.v4, &((struct sockaddr_in *) 1826 ifa->ifa_netmask)->sin_addr, 1827 sizeof(struct in_addr)); 1828 } else if (n->af == AF_INET6) { 1829 n->af = AF_INET6; 1830 memcpy(&n->address.v6, &((struct sockaddr_in6 *) 1831 ifa->ifa_addr)->sin6_addr, 1832 sizeof(struct in6_addr)); 1833 memcpy(&n->mask.v6, &((struct sockaddr_in6 *) 1834 ifa->ifa_netmask)->sin6_addr, 1835 sizeof(struct in6_addr)); 1836 } 1837 n->next = NULL; 1838 n->tail = n; 1839 if (h == NULL) 1840 h = n; 1841 else { 1842 h->tail->next = n; 1843 h->tail = n; 1844 } 1845 } 1846 1847 iftab = h; 1848 freeifaddrs(ifap); 1849} 1850 1851int 1852ifa_exists(const char *ifa_name) 1853{ 1854 struct ipsec_addr_wrap *n; 1855 struct ifgroupreq ifgr; 1856 int s; 1857 1858 if (iftab == NULL) 1859 ifa_load(); 1860 1861 /* check whether this is a group */ 1862 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) 1863 err(1, "ifa_exists: socket"); 1864 bzero(&ifgr, sizeof(ifgr)); 1865 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name)); 1866 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == 0) { 1867 close(s); 1868 return (1); 1869 } 1870 close(s); 1871 1872 for (n = iftab; n; n = n->next) { 1873 if (n->af == AF_LINK && !strncmp(n->name, ifa_name, 1874 IFNAMSIZ)) 1875 return (1); 1876 } 1877 1878 return (0); 1879} 1880 1881struct ipsec_addr_wrap * 1882ifa_grouplookup(const char *ifa_name) 1883{ 1884 struct ifg_req *ifg; 1885 struct ifgroupreq ifgr; 1886 int s; 1887 size_t len; 1888 struct ipsec_addr_wrap *n, *h = NULL, *hn; 1889 1890 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) 1891 err(1, "socket"); 1892 bzero(&ifgr, sizeof(ifgr)); 1893 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name)); 1894 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) { 1895 close(s); 1896 return (NULL); 1897 } 1898 1899 len = ifgr.ifgr_len; 1900 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL) 1901 err(1, "calloc"); 1902 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) 1903 err(1, "ioctl"); 1904 1905 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req); 1906 ifg++) { 1907 len -= sizeof(struct ifg_req); 1908 if ((n = ifa_lookup(ifg->ifgrq_member)) == NULL) 1909 continue; 1910 if (h == NULL) 1911 h = n; 1912 else { 1913 for (hn = h; hn->next != NULL; hn = hn->next) 1914 ; /* nothing */ 1915 hn->next = n; 1916 n->tail = hn; 1917 } 1918 } 1919 free(ifgr.ifgr_groups); 1920 close(s); 1921 1922 return (h); 1923} 1924 1925struct ipsec_addr_wrap * 1926ifa_lookup(const char *ifa_name) 1927{ 1928 struct ipsec_addr_wrap *p = NULL, *h = NULL, *n = NULL; 1929 1930 if (iftab == NULL) 1931 ifa_load(); 1932 1933 if ((n = ifa_grouplookup(ifa_name)) != NULL) 1934 return (n); 1935 1936 for (p = iftab; p; p = p->next) { 1937 if (p->af != AF_INET && p->af != AF_INET6) 1938 continue; 1939 if (strncmp(p->name, ifa_name, IFNAMSIZ)) 1940 continue; 1941 n = calloc(1, sizeof(struct ipsec_addr_wrap)); 1942 if (n == NULL) 1943 err(1, "ifa_lookup: calloc"); 1944 memcpy(n, p, sizeof(struct ipsec_addr_wrap)); 1945 if ((n->name = strdup(p->name)) == NULL) 1946 err(1, "ifa_lookup: strdup"); 1947 switch (n->af) { 1948 case AF_INET: 1949 set_ipmask(n, 32); 1950 break; 1951 case AF_INET6: 1952 /* route/show.c and bgpd/util.c give KAME credit */ 1953 if (IN6_IS_ADDR_LINKLOCAL(&n->address.v6)) { 1954 u_int16_t tmp16; 1955 /* for now we can not handle link local, 1956 * therefore bail for now 1957 */ 1958 free(n); 1959 continue; 1960 1961 memcpy(&tmp16, &n->address.v6.s6_addr[2], 1962 sizeof(tmp16)); 1963 /* use this when we support link-local 1964 * n->??.scopeid = ntohs(tmp16); 1965 */ 1966 n->address.v6.s6_addr[2] = 0; 1967 n->address.v6.s6_addr[3] = 0; 1968 } 1969 set_ipmask(n, 128); 1970 break; 1971 } 1972 1973 n->next = NULL; 1974 n->tail = n; 1975 if (h == NULL) 1976 h = n; 1977 else { 1978 h->tail->next = n; 1979 h->tail = n; 1980 } 1981 } 1982 1983 return (h); 1984} 1985 1986void 1987set_ipmask(struct ipsec_addr_wrap *address, u_int8_t b) 1988{ 1989 struct ipsec_addr *ipa; 1990 int i, j = 0; 1991 1992 ipa = &address->mask; 1993 bzero(ipa, sizeof(struct ipsec_addr)); 1994 1995 while (b >= 32) { 1996 ipa->addr32[j++] = 0xffffffff; 1997 b -= 32; 1998 } 1999 for (i = 31; i > 31 - b; --i) 2000 ipa->addr32[j] |= (1 << i); 2001 if (b) 2002 ipa->addr32[j] = htonl(ipa->addr32[j]); 2003} 2004 2005const struct ipsec_xf * 2006parse_xf(const char *name, const struct ipsec_xf xfs[]) 2007{ 2008 int i; 2009 2010 for (i = 0; xfs[i].name != NULL; i++) { 2011 if (strncmp(name, xfs[i].name, strlen(name))) 2012 continue; 2013 return &xfs[i]; 2014 } 2015 return (NULL); 2016} 2017 2018struct ipsec_lifetime * 2019parse_life(const char *value) 2020{ 2021 struct ipsec_lifetime *life; 2022 int ret; 2023 int seconds = 0; 2024 char unit = 0; 2025 2026 ret = sscanf(value, "%d%c", &seconds, &unit); 2027 if (ret == 2) { 2028 switch (tolower((unsigned char)unit)) { 2029 case 'm': 2030 seconds *= 60; 2031 break; 2032 case 'h': 2033 seconds *= 60 * 60; 2034 break; 2035 default: 2036 err(1, "invalid time unit"); 2037 } 2038 } else if (ret != 1) 2039 err(1, "invalid time specification: %s", value); 2040 2041 life = calloc(1, sizeof(struct ipsec_lifetime)); 2042 if (life == NULL) 2043 err(1, "calloc"); 2044 2045 life->lt_seconds = seconds; 2046 life->lt_bytes = -1; 2047 2048 return (life); 2049} 2050 2051struct ipsec_transforms * 2052copytransforms(const struct ipsec_transforms *xfs) 2053{ 2054 struct ipsec_transforms *newxfs; 2055 2056 if (xfs == NULL) 2057 return (NULL); 2058 2059 newxfs = calloc(1, sizeof(struct ipsec_transforms)); 2060 if (newxfs == NULL) 2061 err(1, "copytransforms: calloc"); 2062 2063 memcpy(newxfs, xfs, sizeof(struct ipsec_transforms)); 2064 return (newxfs); 2065} 2066 2067struct ipsec_lifetime * 2068copylife(const struct ipsec_lifetime *life) 2069{ 2070 struct ipsec_lifetime *newlife; 2071 2072 if (life == NULL) 2073 return (NULL); 2074 2075 newlife = calloc(1, sizeof(struct ipsec_lifetime)); 2076 if (newlife == NULL) 2077 err(1, "copylife: calloc"); 2078 2079 memcpy(newlife, life, sizeof(struct ipsec_lifetime)); 2080 return (newlife); 2081} 2082 2083struct ipsec_auth * 2084copyipsecauth(const struct ipsec_auth *auth) 2085{ 2086 struct ipsec_auth *newauth; 2087 2088 if (auth == NULL) 2089 return (NULL); 2090 2091 if ((newauth = calloc(1, sizeof(struct ipsec_auth))) == NULL) 2092 err(1, "calloc"); 2093 if (auth->srcid && 2094 asprintf(&newauth->srcid, "%s", auth->srcid) == -1) 2095 err(1, "asprintf"); 2096 if (auth->dstid && 2097 asprintf(&newauth->dstid, "%s", auth->dstid) == -1) 2098 err(1, "asprintf"); 2099 2100 newauth->srcid_type = auth->srcid_type; 2101 newauth->dstid_type = auth->dstid_type; 2102 newauth->type = auth->type; 2103 2104 return (newauth); 2105} 2106 2107struct ike_auth * 2108copyikeauth(const struct ike_auth *auth) 2109{ 2110 struct ike_auth *newauth; 2111 2112 if (auth == NULL) 2113 return (NULL); 2114 2115 if ((newauth = calloc(1, sizeof(struct ike_auth))) == NULL) 2116 err(1, "calloc"); 2117 if (auth->string && 2118 asprintf(&newauth->string, "%s", auth->string) == -1) 2119 err(1, "asprintf"); 2120 2121 newauth->type = auth->type; 2122 2123 return (newauth); 2124} 2125 2126struct ipsec_key * 2127copykey(struct ipsec_key *key) 2128{ 2129 struct ipsec_key *newkey; 2130 2131 if (key == NULL) 2132 return (NULL); 2133 2134 if ((newkey = calloc(1, sizeof(struct ipsec_key))) == NULL) 2135 err(1, "calloc"); 2136 if ((newkey->data = calloc(key->len, sizeof(u_int8_t))) == NULL) 2137 err(1, "calloc"); 2138 memcpy(newkey->data, key->data, key->len); 2139 newkey->len = key->len; 2140 2141 return (newkey); 2142} 2143 2144struct ipsec_addr_wrap * 2145copyhost(const struct ipsec_addr_wrap *src) 2146{ 2147 struct ipsec_addr_wrap *dst; 2148 2149 if (src == NULL) 2150 return (NULL); 2151 2152 dst = calloc(1, sizeof(struct ipsec_addr_wrap)); 2153 if (dst == NULL) 2154 err(1, "copyhost: calloc"); 2155 2156 memcpy(dst, src, sizeof(struct ipsec_addr_wrap)); 2157 2158 if (src->name != NULL && (dst->name = strdup(src->name)) == NULL) 2159 err(1, "copyhost: strdup"); 2160 2161 return dst; 2162} 2163 2164char * 2165copytag(const char *src) 2166{ 2167 char *tag; 2168 2169 if (src == NULL) 2170 return (NULL); 2171 if ((tag = strdup(src)) == NULL) 2172 err(1, "copytag: strdup"); 2173 2174 return (tag); 2175} 2176 2177struct ipsec_rule * 2178copyrule(struct ipsec_rule *rule) 2179{ 2180 struct ipsec_rule *r; 2181 2182 if ((r = calloc(1, sizeof(struct ipsec_rule))) == NULL) 2183 err(1, "calloc"); 2184 2185 r->src = copyhost(rule->src); 2186 r->dst = copyhost(rule->dst); 2187 r->local = copyhost(rule->local); 2188 r->peer = copyhost(rule->peer); 2189 r->auth = copyipsecauth(rule->auth); 2190 r->ikeauth = copyikeauth(rule->ikeauth); 2191 r->xfs = copytransforms(rule->xfs); 2192 r->p1xfs = copytransforms(rule->p1xfs); 2193 r->p2xfs = copytransforms(rule->p2xfs); 2194 r->p1life = copylife(rule->p1life); 2195 r->p2life = copylife(rule->p2life); 2196 r->authkey = copykey(rule->authkey); 2197 r->enckey = copykey(rule->enckey); 2198 r->tag = copytag(rule->tag); 2199 2200 r->p1ie = rule->p1ie; 2201 r->p2ie = rule->p2ie; 2202 r->type = rule->type; 2203 r->satype = rule->satype; 2204 r->proto = rule->proto; 2205 r->tmode = rule->tmode; 2206 r->direction = rule->direction; 2207 r->flowtype = rule->flowtype; 2208 r->sport = rule->sport; 2209 r->dport = rule->dport; 2210 r->ikemode = rule->ikemode; 2211 r->spi = rule->spi; 2212 r->nr = rule->nr; 2213 2214 return (r); 2215} 2216 2217int 2218validate_af(struct ipsec_addr_wrap *src, struct ipsec_addr_wrap *dst) 2219{ 2220 struct ipsec_addr_wrap *ta; 2221 u_int8_t src_v4 = 0; 2222 u_int8_t dst_v4 = 0; 2223 u_int8_t src_v6 = 0; 2224 u_int8_t dst_v6 = 0; 2225 2226 for (ta = src; ta; ta = ta->next) { 2227 if (ta->af == AF_INET) 2228 src_v4 = 1; 2229 if (ta->af == AF_INET6) 2230 src_v6 = 1; 2231 if (ta->af == AF_UNSPEC) 2232 return 0; 2233 if (src_v4 && src_v6) 2234 break; 2235 } 2236 for (ta = dst; ta; ta = ta->next) { 2237 if (ta->af == AF_INET) 2238 dst_v4 = 1; 2239 if (ta->af == AF_INET6) 2240 dst_v6 = 1; 2241 if (ta->af == AF_UNSPEC) 2242 return 0; 2243 if (dst_v4 && dst_v6) 2244 break; 2245 } 2246 if (src_v4 != dst_v4 && src_v6 != dst_v6) 2247 return (1); 2248 2249 return (0); 2250} 2251 2252 2253int 2254validate_sa(u_int32_t spi, u_int8_t satype, struct ipsec_transforms *xfs, 2255 struct ipsec_key *authkey, struct ipsec_key *enckey, u_int8_t tmode) 2256{ 2257 /* Sanity checks */ 2258 if (spi == 0) { 2259 yyerror("no SPI specified"); 2260 return (0); 2261 } 2262 if (satype == IPSEC_AH) { 2263 if (!xfs) { 2264 yyerror("no transforms specified"); 2265 return (0); 2266 } 2267 if (!xfs->authxf) 2268 xfs->authxf = &authxfs[AUTHXF_HMAC_SHA2_256]; 2269 if (xfs->encxf) { 2270 yyerror("ah does not provide encryption"); 2271 return (0); 2272 } 2273 if (xfs->compxf) { 2274 yyerror("ah does not provide compression"); 2275 return (0); 2276 } 2277 } 2278 if (satype == IPSEC_ESP) { 2279 if (!xfs) { 2280 yyerror("no transforms specified"); 2281 return (0); 2282 } 2283 if (xfs->compxf) { 2284 yyerror("esp does not provide compression"); 2285 return (0); 2286 } 2287 if (!xfs->encxf) 2288 xfs->encxf = &encxfs[ENCXF_AES]; 2289 if (xfs->encxf->nostatic) { 2290 yyerror("%s is disallowed with static keys", 2291 xfs->encxf->name); 2292 return 0; 2293 } 2294 if (xfs->encxf->noauth && xfs->authxf) { 2295 yyerror("authentication is implicit for %s", 2296 xfs->encxf->name); 2297 return (0); 2298 } else if (!xfs->encxf->noauth && !xfs->authxf) 2299 xfs->authxf = &authxfs[AUTHXF_HMAC_SHA2_256]; 2300 } 2301 if (satype == IPSEC_IPCOMP) { 2302 if (!xfs) { 2303 yyerror("no transform specified"); 2304 return (0); 2305 } 2306 if (xfs->authxf || xfs->encxf) { 2307 yyerror("no encryption or authentication with ipcomp"); 2308 return (0); 2309 } 2310 if (!xfs->compxf) 2311 xfs->compxf = &compxfs[COMPXF_DEFLATE]; 2312 } 2313 if (satype == IPSEC_IPIP) { 2314 if (!xfs) { 2315 yyerror("no transform specified"); 2316 return (0); 2317 } 2318 if (xfs->authxf || xfs->encxf || xfs->compxf) { 2319 yyerror("no encryption, authentication or compression" 2320 " with ipip"); 2321 return (0); 2322 } 2323 } 2324 if (satype == IPSEC_TCPMD5 && authkey == NULL && tmode != 2325 IPSEC_TRANSPORT) { 2326 yyerror("authentication key needed for tcpmd5"); 2327 return (0); 2328 } 2329 if (xfs && xfs->authxf) { 2330 if (!authkey && xfs->authxf != &authxfs[AUTHXF_NONE]) { 2331 yyerror("no authentication key specified"); 2332 return (0); 2333 } 2334 if (authkey && authkey->len != xfs->authxf->keymin) { 2335 yyerror("wrong authentication key length, needs to be " 2336 "%zu bits", xfs->authxf->keymin * 8); 2337 return (0); 2338 } 2339 } 2340 if (xfs && xfs->encxf) { 2341 if (!enckey && xfs->encxf != &encxfs[ENCXF_NULL]) { 2342 yyerror("no encryption key specified"); 2343 return (0); 2344 } 2345 if (enckey) { 2346 if (enckey->len < xfs->encxf->keymin) { 2347 yyerror("encryption key too short (%zu bits), " 2348 "minimum %zu bits", enckey->len * 8, 2349 xfs->encxf->keymin * 8); 2350 return (0); 2351 } 2352 if (xfs->encxf->keymax < enckey->len) { 2353 yyerror("encryption key too long (%zu bits), " 2354 "maximum %zu bits", enckey->len * 8, 2355 xfs->encxf->keymax * 8); 2356 return (0); 2357 } 2358 } 2359 } 2360 2361 return 1; 2362} 2363 2364int 2365add_sabundle(struct ipsec_rule *r, char *bundle) 2366{ 2367 struct ipsec_rule *rp, *last, *sabundle; 2368 int found = 0; 2369 2370 TAILQ_FOREACH(rp, &ipsec->bundle_queue, bundle_entry) { 2371 if ((strcmp(rp->src->name, r->src->name) == 0) && 2372 (strcmp(rp->dst->name, r->dst->name) == 0) && 2373 (strcmp(rp->bundle, bundle) == 0)) { 2374 found = 1; 2375 break; 2376 } 2377 } 2378 if (found) { 2379 last = TAILQ_LAST(&rp->dst_bundle_queue, dst_bundle_queue); 2380 TAILQ_INSERT_TAIL(&rp->dst_bundle_queue, r, dst_bundle_entry); 2381 2382 sabundle = create_sabundle(last->dst, last->satype, last->spi, 2383 r->dst, r->satype, r->spi); 2384 if (sabundle == NULL) 2385 return (1); 2386 sabundle->nr = ipsec->rule_nr++; 2387 if (ipsecctl_add_rule(ipsec, sabundle)) 2388 return (1); 2389 } else { 2390 TAILQ_INSERT_TAIL(&ipsec->bundle_queue, r, bundle_entry); 2391 TAILQ_INIT(&r->dst_bundle_queue); 2392 TAILQ_INSERT_TAIL(&r->dst_bundle_queue, r, dst_bundle_entry); 2393 r->bundle = bundle; 2394 } 2395 2396 return (0); 2397} 2398 2399struct ipsec_rule * 2400create_sa(u_int8_t satype, u_int8_t tmode, struct ipsec_hosts *hosts, 2401 u_int32_t spi, struct ipsec_transforms *xfs, struct ipsec_key *authkey, 2402 struct ipsec_key *enckey) 2403{ 2404 struct ipsec_rule *r; 2405 2406 if (validate_sa(spi, satype, xfs, authkey, enckey, tmode) == 0) 2407 return (NULL); 2408 2409 r = calloc(1, sizeof(struct ipsec_rule)); 2410 if (r == NULL) 2411 err(1, "create_sa: calloc"); 2412 2413 r->type |= RULE_SA; 2414 r->satype = satype; 2415 r->tmode = tmode; 2416 r->src = hosts->src; 2417 r->dst = hosts->dst; 2418 r->spi = spi; 2419 r->xfs = xfs; 2420 r->authkey = authkey; 2421 r->enckey = enckey; 2422 2423 return r; 2424} 2425 2426struct ipsec_rule * 2427reverse_sa(struct ipsec_rule *rule, u_int32_t spi, struct ipsec_key *authkey, 2428 struct ipsec_key *enckey) 2429{ 2430 struct ipsec_rule *reverse; 2431 2432 if (validate_sa(spi, rule->satype, rule->xfs, authkey, enckey, 2433 rule->tmode) == 0) 2434 return (NULL); 2435 2436 reverse = calloc(1, sizeof(struct ipsec_rule)); 2437 if (reverse == NULL) 2438 err(1, "reverse_sa: calloc"); 2439 2440 reverse->type |= RULE_SA; 2441 reverse->satype = rule->satype; 2442 reverse->tmode = rule->tmode; 2443 reverse->src = copyhost(rule->dst); 2444 reverse->dst = copyhost(rule->src); 2445 reverse->spi = spi; 2446 reverse->xfs = copytransforms(rule->xfs); 2447 reverse->authkey = authkey; 2448 reverse->enckey = enckey; 2449 2450 return (reverse); 2451} 2452 2453struct ipsec_rule * 2454create_sabundle(struct ipsec_addr_wrap *dst, u_int8_t proto, u_int32_t spi, 2455 struct ipsec_addr_wrap *dst2, u_int8_t proto2, u_int32_t spi2) 2456{ 2457 struct ipsec_rule *r; 2458 2459 r = calloc(1, sizeof(struct ipsec_rule)); 2460 if (r == NULL) 2461 err(1, "create_sabundle: calloc"); 2462 2463 r->type |= RULE_BUNDLE; 2464 2465 r->dst = copyhost(dst); 2466 r->dst2 = copyhost(dst2); 2467 r->proto = proto; 2468 r->proto2 = proto2; 2469 r->spi = spi; 2470 r->spi2 = spi2; 2471 r->satype = proto; 2472 2473 return (r); 2474} 2475 2476struct ipsec_rule * 2477create_flow(u_int8_t dir, u_int8_t proto, struct ipsec_hosts *hosts, 2478 u_int8_t satype, char *srcid, char *dstid, u_int8_t type) 2479{ 2480 struct ipsec_rule *r; 2481 2482 r = calloc(1, sizeof(struct ipsec_rule)); 2483 if (r == NULL) 2484 err(1, "create_flow: calloc"); 2485 2486 r->type |= RULE_FLOW; 2487 2488 if (dir == IPSEC_INOUT) 2489 r->direction = IPSEC_OUT; 2490 else 2491 r->direction = dir; 2492 2493 r->satype = satype; 2494 r->proto = proto; 2495 r->src = hosts->src; 2496 r->sport = hosts->sport; 2497 r->dst = hosts->dst; 2498 r->dport = hosts->dport; 2499 if ((hosts->sport != 0 || hosts->dport != 0) && 2500 (proto != IPPROTO_TCP && proto != IPPROTO_UDP)) { 2501 yyerror("no protocol supplied with source/destination ports"); 2502 goto errout; 2503 } 2504 2505 switch (satype) { 2506 case IPSEC_IPCOMP: 2507 case IPSEC_IPIP: 2508 if (type == TYPE_UNKNOWN) 2509 type = TYPE_USE; 2510 break; 2511 default: 2512 if (type == TYPE_UNKNOWN) 2513 type = TYPE_REQUIRE; 2514 break; 2515 } 2516 2517 r->flowtype = type; 2518 if (type == TYPE_DENY || type == TYPE_BYPASS) 2519 return (r); 2520 2521 r->auth = calloc(1, sizeof(struct ipsec_auth)); 2522 if (r->auth == NULL) 2523 err(1, "create_flow: calloc"); 2524 r->auth->srcid = srcid; 2525 r->auth->dstid = dstid; 2526 r->auth->srcid_type = get_id_type(srcid); 2527 r->auth->dstid_type = get_id_type(dstid); 2528 return r; 2529 2530errout: 2531 free(r); 2532 if (srcid) 2533 free(srcid); 2534 if (dstid) 2535 free(dstid); 2536 free(hosts->src); 2537 hosts->src = NULL; 2538 free(hosts->dst); 2539 hosts->dst = NULL; 2540 2541 return NULL; 2542} 2543 2544void 2545expand_any(struct ipsec_addr_wrap *ipa_in) 2546{ 2547 struct ipsec_addr_wrap *oldnext, *ipa; 2548 2549 for (ipa = ipa_in; ipa; ipa = ipa->next) { 2550 if (ipa->af != AF_UNSPEC) 2551 continue; 2552 oldnext = ipa->next; 2553 2554 ipa->af = AF_INET; 2555 ipa->netaddress = 1; 2556 if ((ipa->name = strdup("0.0.0.0/0")) == NULL) 2557 err(1, "expand_any: strdup"); 2558 2559 ipa->next = calloc(1, sizeof(struct ipsec_addr_wrap)); 2560 if (ipa->next == NULL) 2561 err(1, "expand_any: calloc"); 2562 ipa->next->af = AF_INET6; 2563 ipa->next->netaddress = 1; 2564 if ((ipa->next->name = strdup("::/0")) == NULL) 2565 err(1, "expand_any: strdup"); 2566 2567 ipa->next->next = oldnext; 2568 } 2569} 2570 2571int 2572set_rule_peers(struct ipsec_rule *r, struct ipsec_hosts *peers) 2573{ 2574 if (r->type == RULE_FLOW && 2575 (r->flowtype == TYPE_DENY || r->flowtype == TYPE_BYPASS)) 2576 return (0); 2577 2578 r->local = copyhost(peers->src); 2579 r->peer = copyhost(peers->dst); 2580 if (r->peer == NULL) { 2581 /* Set peer to remote host. Must be a host address. */ 2582 if (r->direction == IPSEC_IN) { 2583 if (!r->src->netaddress) 2584 r->peer = copyhost(r->src); 2585 } else { 2586 if (!r->dst->netaddress) 2587 r->peer = copyhost(r->dst); 2588 } 2589 } 2590 if (r->type == RULE_FLOW && r->peer == NULL) { 2591 yyerror("no peer specified for destination %s", 2592 r->dst->name); 2593 return (1); 2594 } 2595 if (r->peer != NULL && r->peer->af == AF_UNSPEC) { 2596 /* If peer has been specified as any, use the default peer. */ 2597 free(r->peer); 2598 r->peer = NULL; 2599 } 2600 if (r->type == RULE_IKE && r->peer == NULL) { 2601 /* 2602 * Check if the default peer is consistent for all 2603 * rules. Only warn to avoid breaking existing configs. 2604 */ 2605 static struct ipsec_rule *pdr = NULL; 2606 2607 if (pdr == NULL) { 2608 /* Remember first default peer rule for comparison. */ 2609 pdr = r; 2610 } else { 2611 /* The new default peer must create the same config. */ 2612 if ((pdr->local == NULL && r->local != NULL) || 2613 (pdr->local != NULL && r->local == NULL) || 2614 (pdr->local != NULL && r->local != NULL && 2615 strcmp(pdr->local->name, r->local->name))) 2616 yywarn("default peer local mismatch"); 2617 if (pdr->ikeauth->type != r->ikeauth->type) 2618 yywarn("default peer phase 1 auth mismatch"); 2619 if (pdr->ikeauth->type == IKE_AUTH_PSK && 2620 r->ikeauth->type == IKE_AUTH_PSK && 2621 strcmp(pdr->ikeauth->string, r->ikeauth->string)) 2622 yywarn("default peer psk mismatch"); 2623 if (pdr->p1ie != r->p1ie) 2624 yywarn("default peer phase 1 mode mismatch"); 2625 /* 2626 * Transforms have ADD insted of SET so they may be 2627 * different and are not checked here. 2628 */ 2629 if ((pdr->auth->srcid == NULL && 2630 r->auth->srcid != NULL) || 2631 (pdr->auth->srcid != NULL && 2632 r->auth->srcid == NULL) || 2633 (pdr->auth->srcid != NULL && 2634 r->auth->srcid != NULL && 2635 strcmp(pdr->auth->srcid, r->auth->srcid))) 2636 yywarn("default peer srcid mismatch"); 2637 if ((pdr->auth->dstid == NULL && 2638 r->auth->dstid != NULL) || 2639 (pdr->auth->dstid != NULL && 2640 r->auth->dstid == NULL) || 2641 (pdr->auth->dstid != NULL && 2642 r->auth->dstid != NULL && 2643 strcmp(pdr->auth->dstid, r->auth->dstid))) 2644 yywarn("default peer dstid mismatch"); 2645 } 2646 } 2647 return (0); 2648} 2649 2650int 2651expand_rule(struct ipsec_rule *rule, struct ipsec_hosts *peers, 2652 u_int8_t direction, u_int32_t spi, struct ipsec_key *authkey, 2653 struct ipsec_key *enckey, char *bundle) 2654{ 2655 struct ipsec_rule *r, *revr; 2656 struct ipsec_addr_wrap *src, *dst; 2657 int added = 0, ret = 1; 2658 2659 if (validate_af(rule->src, rule->dst)) { 2660 yyerror("source/destination address families do not match"); 2661 goto errout; 2662 } 2663 expand_any(rule->src); 2664 expand_any(rule->dst); 2665 for (src = rule->src; src; src = src->next) { 2666 for (dst = rule->dst; dst; dst = dst->next) { 2667 if (src->af != dst->af) 2668 continue; 2669 r = copyrule(rule); 2670 2671 r->src = copyhost(src); 2672 r->dst = copyhost(dst); 2673 2674 if (peers && set_rule_peers(r, peers)) { 2675 ipsecctl_free_rule(r); 2676 goto errout; 2677 } 2678 2679 r->nr = ipsec->rule_nr++; 2680 if (ipsecctl_add_rule(ipsec, r)) 2681 goto out; 2682 if (bundle && add_sabundle(r, bundle)) 2683 goto out; 2684 2685 if (direction == IPSEC_INOUT) { 2686 /* Create and add reverse flow rule. */ 2687 revr = reverse_rule(r); 2688 if (revr == NULL) 2689 goto out; 2690 2691 revr->nr = ipsec->rule_nr++; 2692 if (ipsecctl_add_rule(ipsec, revr)) 2693 goto out; 2694 if (bundle && add_sabundle(revr, bundle)) 2695 goto out; 2696 } else if (spi != 0 || authkey || enckey) { 2697 /* Create and add reverse sa rule. */ 2698 revr = reverse_sa(r, spi, authkey, enckey); 2699 if (revr == NULL) 2700 goto out; 2701 2702 revr->nr = ipsec->rule_nr++; 2703 if (ipsecctl_add_rule(ipsec, revr)) 2704 goto out; 2705 if (bundle && add_sabundle(revr, bundle)) 2706 goto out; 2707 } 2708 added++; 2709 } 2710 } 2711 if (!added) 2712 yyerror("rule expands to no valid combination"); 2713 errout: 2714 ret = 0; 2715 ipsecctl_free_rule(rule); 2716 out: 2717 if (peers) { 2718 if (peers->src) 2719 free(peers->src); 2720 if (peers->dst) 2721 free(peers->dst); 2722 } 2723 return (ret); 2724} 2725 2726struct ipsec_rule * 2727reverse_rule(struct ipsec_rule *rule) 2728{ 2729 struct ipsec_rule *reverse; 2730 2731 reverse = calloc(1, sizeof(struct ipsec_rule)); 2732 if (reverse == NULL) 2733 err(1, "reverse_rule: calloc"); 2734 2735 reverse->type |= RULE_FLOW; 2736 2737 /* Reverse direction */ 2738 if (rule->direction == (u_int8_t)IPSEC_OUT) 2739 reverse->direction = (u_int8_t)IPSEC_IN; 2740 else 2741 reverse->direction = (u_int8_t)IPSEC_OUT; 2742 2743 reverse->flowtype = rule->flowtype; 2744 reverse->src = copyhost(rule->dst); 2745 reverse->dst = copyhost(rule->src); 2746 reverse->sport = rule->dport; 2747 reverse->dport = rule->sport; 2748 if (rule->local) 2749 reverse->local = copyhost(rule->local); 2750 if (rule->peer) 2751 reverse->peer = copyhost(rule->peer); 2752 reverse->satype = rule->satype; 2753 reverse->proto = rule->proto; 2754 2755 if (rule->auth) { 2756 reverse->auth = calloc(1, sizeof(struct ipsec_auth)); 2757 if (reverse->auth == NULL) 2758 err(1, "reverse_rule: calloc"); 2759 if (rule->auth->dstid && (reverse->auth->dstid = 2760 strdup(rule->auth->dstid)) == NULL) 2761 err(1, "reverse_rule: strdup"); 2762 if (rule->auth->srcid && (reverse->auth->srcid = 2763 strdup(rule->auth->srcid)) == NULL) 2764 err(1, "reverse_rule: strdup"); 2765 reverse->auth->srcid_type = rule->auth->srcid_type; 2766 reverse->auth->dstid_type = rule->auth->dstid_type; 2767 reverse->auth->type = rule->auth->type; 2768 } 2769 2770 return reverse; 2771} 2772 2773struct ipsec_rule * 2774create_ike(u_int8_t proto, struct ipsec_hosts *hosts, 2775 struct ike_mode *phase1mode, struct ike_mode *phase2mode, u_int8_t satype, 2776 u_int8_t tmode, u_int8_t mode, char *srcid, char *dstid, 2777 struct ike_auth *authtype, char *tag) 2778{ 2779 struct ipsec_rule *r; 2780 2781 r = calloc(1, sizeof(struct ipsec_rule)); 2782 if (r == NULL) 2783 err(1, "create_ike: calloc"); 2784 2785 r->type = RULE_IKE; 2786 2787 r->proto = proto; 2788 r->src = hosts->src; 2789 r->sport = hosts->sport; 2790 r->dst = hosts->dst; 2791 r->dport = hosts->dport; 2792 if ((hosts->sport != 0 || hosts->dport != 0) && 2793 (proto != IPPROTO_TCP && proto != IPPROTO_UDP)) { 2794 yyerror("no protocol supplied with source/destination ports"); 2795 goto errout; 2796 } 2797 2798 r->satype = satype; 2799 r->tmode = tmode; 2800 r->ikemode = mode; 2801 if (phase1mode) { 2802 r->p1xfs = phase1mode->xfs; 2803 r->p1life = phase1mode->life; 2804 r->p1ie = phase1mode->ike_exch; 2805 } else { 2806 r->p1ie = IKE_MM; 2807 } 2808 if (phase2mode) { 2809 if (phase2mode->xfs && phase2mode->xfs->encxf && 2810 phase2mode->xfs->encxf->noauth && 2811 phase2mode->xfs->authxf) { 2812 yyerror("authentication is implicit for %s", 2813 phase2mode->xfs->encxf->name); 2814 goto errout; 2815 } 2816 r->p2xfs = phase2mode->xfs; 2817 r->p2life = phase2mode->life; 2818 r->p2ie = phase2mode->ike_exch; 2819 } else { 2820 r->p2ie = IKE_QM; 2821 } 2822 2823 r->auth = calloc(1, sizeof(struct ipsec_auth)); 2824 if (r->auth == NULL) 2825 err(1, "create_ike: calloc"); 2826 r->auth->srcid = srcid; 2827 r->auth->dstid = dstid; 2828 r->auth->srcid_type = get_id_type(srcid); 2829 r->auth->dstid_type = get_id_type(dstid); 2830 r->ikeauth = calloc(1, sizeof(struct ike_auth)); 2831 if (r->ikeauth == NULL) 2832 err(1, "create_ike: calloc"); 2833 r->ikeauth->type = authtype->type; 2834 r->ikeauth->string = authtype->string; 2835 r->tag = tag; 2836 2837 return (r); 2838 2839errout: 2840 free(r); 2841 free(hosts->src); 2842 hosts->src = NULL; 2843 free(hosts->dst); 2844 hosts->dst = NULL; 2845 if (phase1mode) { 2846 free(phase1mode->xfs); 2847 phase1mode->xfs = NULL; 2848 free(phase1mode->life); 2849 phase1mode->life = NULL; 2850 } 2851 if (phase2mode) { 2852 free(phase2mode->xfs); 2853 phase2mode->xfs = NULL; 2854 free(phase2mode->life); 2855 phase2mode->life = NULL; 2856 } 2857 if (srcid) 2858 free(srcid); 2859 if (dstid) 2860 free(dstid); 2861 return NULL; 2862} 2863