1 /* 2 * util/net_help.c - implementation of the network helper code 3 * 4 * Copyright (c) 2007, NLnet Labs. All rights reserved. 5 * 6 * This software is open source. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * Redistributions of source code must retain the above copyright notice, 13 * this list of conditions and the following disclaimer. 14 * 15 * Redistributions in binary form must reproduce the above copyright notice, 16 * this list of conditions and the following disclaimer in the documentation 17 * and/or other materials provided with the distribution. 18 * 19 * Neither the name of the NLNET LABS nor the names of its contributors may 20 * be used to endorse or promote products derived from this software without 21 * specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 27 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 29 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 /** 36 * \file 37 * Implementation of net_help.h. 38 */ 39 40 #include "config.h" 41 #include "util/net_help.h" 42 #include "util/log.h" 43 #include "util/data/dname.h" 44 #include "util/module.h" 45 #include "util/regional.h" 46 #include "sldns/parseutil.h" 47 #include "sldns/wire2str.h" 48 #include <fcntl.h> 49 #ifdef HAVE_OPENSSL_SSL_H 50 #include <openssl/ssl.h> 51 #endif 52 #ifdef HAVE_OPENSSL_ERR_H 53 #include <openssl/err.h> 54 #endif 55 56 /** max length of an IP address (the address portion) that we allow */ 57 #define MAX_ADDR_STRLEN 128 /* characters */ 58 /** default value for EDNS ADVERTISED size */ 59 uint16_t EDNS_ADVERTISED_SIZE = 4096; 60 61 /** minimal responses when positive answer: default is no */ 62 int MINIMAL_RESPONSES = 0; 63 64 /** rrset order roundrobin: default is no */ 65 int RRSET_ROUNDROBIN = 0; 66 67 /* returns true is string addr is an ip6 specced address */ 68 int 69 str_is_ip6(const char* str) 70 { 71 if(strchr(str, ':')) 72 return 1; 73 else return 0; 74 } 75 76 int 77 fd_set_nonblock(int s) 78 { 79 #ifdef HAVE_FCNTL 80 int flag; 81 if((flag = fcntl(s, F_GETFL)) == -1) { 82 log_err("can't fcntl F_GETFL: %s", strerror(errno)); 83 flag = 0; 84 } 85 flag |= O_NONBLOCK; 86 if(fcntl(s, F_SETFL, flag) == -1) { 87 log_err("can't fcntl F_SETFL: %s", strerror(errno)); 88 return 0; 89 } 90 #elif defined(HAVE_IOCTLSOCKET) 91 unsigned long on = 1; 92 if(ioctlsocket(s, FIONBIO, &on) != 0) { 93 log_err("can't ioctlsocket FIONBIO on: %s", 94 wsa_strerror(WSAGetLastError())); 95 } 96 #endif 97 return 1; 98 } 99 100 int 101 fd_set_block(int s) 102 { 103 #ifdef HAVE_FCNTL 104 int flag; 105 if((flag = fcntl(s, F_GETFL)) == -1) { 106 log_err("cannot fcntl F_GETFL: %s", strerror(errno)); 107 flag = 0; 108 } 109 flag &= ~O_NONBLOCK; 110 if(fcntl(s, F_SETFL, flag) == -1) { 111 log_err("cannot fcntl F_SETFL: %s", strerror(errno)); 112 return 0; 113 } 114 #elif defined(HAVE_IOCTLSOCKET) 115 unsigned long off = 0; 116 if(ioctlsocket(s, FIONBIO, &off) != 0) { 117 if(WSAGetLastError() != WSAEINVAL || verbosity >= 4) 118 log_err("can't ioctlsocket FIONBIO off: %s", 119 wsa_strerror(WSAGetLastError())); 120 } 121 #endif 122 return 1; 123 } 124 125 int 126 is_pow2(size_t num) 127 { 128 if(num == 0) return 1; 129 return (num & (num-1)) == 0; 130 } 131 132 void* 133 memdup(void* data, size_t len) 134 { 135 void* d; 136 if(!data) return NULL; 137 if(len == 0) return NULL; 138 d = malloc(len); 139 if(!d) return NULL; 140 memcpy(d, data, len); 141 return d; 142 } 143 144 void 145 log_addr(enum verbosity_value v, const char* str, 146 struct sockaddr_storage* addr, socklen_t addrlen) 147 { 148 uint16_t port; 149 const char* family = "unknown"; 150 char dest[100]; 151 int af = (int)((struct sockaddr_in*)addr)->sin_family; 152 void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 153 if(verbosity < v) 154 return; 155 switch(af) { 156 case AF_INET: family="ip4"; break; 157 case AF_INET6: family="ip6"; 158 sinaddr = &((struct sockaddr_in6*)addr)->sin6_addr; 159 break; 160 case AF_LOCAL: 161 dest[0]=0; 162 (void)inet_ntop(af, sinaddr, dest, 163 (socklen_t)sizeof(dest)); 164 verbose(v, "%s local %s", str, dest); 165 return; /* do not continue and try to get port */ 166 default: break; 167 } 168 if(inet_ntop(af, sinaddr, dest, (socklen_t)sizeof(dest)) == 0) { 169 (void)strlcpy(dest, "(inet_ntop error)", sizeof(dest)); 170 } 171 dest[sizeof(dest)-1] = 0; 172 port = ntohs(((struct sockaddr_in*)addr)->sin_port); 173 if(verbosity >= 4) 174 verbose(v, "%s %s %s port %d (len %d)", str, family, dest, 175 (int)port, (int)addrlen); 176 else verbose(v, "%s %s port %d", str, dest, (int)port); 177 } 178 179 int 180 extstrtoaddr(const char* str, struct sockaddr_storage* addr, 181 socklen_t* addrlen) 182 { 183 char* s; 184 int port = UNBOUND_DNS_PORT; 185 if((s=strchr(str, '@'))) { 186 char buf[MAX_ADDR_STRLEN]; 187 if(s-str >= MAX_ADDR_STRLEN) { 188 return 0; 189 } 190 (void)strlcpy(buf, str, sizeof(buf)); 191 buf[s-str] = 0; 192 port = atoi(s+1); 193 if(port == 0 && strcmp(s+1,"0")!=0) { 194 return 0; 195 } 196 return ipstrtoaddr(buf, port, addr, addrlen); 197 } 198 return ipstrtoaddr(str, port, addr, addrlen); 199 } 200 201 202 int 203 ipstrtoaddr(const char* ip, int port, struct sockaddr_storage* addr, 204 socklen_t* addrlen) 205 { 206 uint16_t p; 207 if(!ip) return 0; 208 p = (uint16_t) port; 209 if(str_is_ip6(ip)) { 210 char buf[MAX_ADDR_STRLEN]; 211 char* s; 212 struct sockaddr_in6* sa = (struct sockaddr_in6*)addr; 213 *addrlen = (socklen_t)sizeof(struct sockaddr_in6); 214 memset(sa, 0, *addrlen); 215 sa->sin6_family = AF_INET6; 216 sa->sin6_port = (in_port_t)htons(p); 217 if((s=strchr(ip, '%'))) { /* ip6%interface, rfc 4007 */ 218 if(s-ip >= MAX_ADDR_STRLEN) 219 return 0; 220 (void)strlcpy(buf, ip, sizeof(buf)); 221 buf[s-ip]=0; 222 sa->sin6_scope_id = (uint32_t)atoi(s+1); 223 ip = buf; 224 } 225 if(inet_pton((int)sa->sin6_family, ip, &sa->sin6_addr) <= 0) { 226 return 0; 227 } 228 } else { /* ip4 */ 229 struct sockaddr_in* sa = (struct sockaddr_in*)addr; 230 *addrlen = (socklen_t)sizeof(struct sockaddr_in); 231 memset(sa, 0, *addrlen); 232 sa->sin_family = AF_INET; 233 sa->sin_port = (in_port_t)htons(p); 234 if(inet_pton((int)sa->sin_family, ip, &sa->sin_addr) <= 0) { 235 return 0; 236 } 237 } 238 return 1; 239 } 240 241 int netblockstrtoaddr(const char* str, int port, struct sockaddr_storage* addr, 242 socklen_t* addrlen, int* net) 243 { 244 char* s = NULL; 245 *net = (str_is_ip6(str)?128:32); 246 if((s=strchr(str, '/'))) { 247 if(atoi(s+1) > *net) { 248 log_err("netblock too large: %s", str); 249 return 0; 250 } 251 *net = atoi(s+1); 252 if(*net == 0 && strcmp(s+1, "0") != 0) { 253 log_err("cannot parse netblock: '%s'", str); 254 return 0; 255 } 256 if(!(s = strdup(str))) { 257 log_err("out of memory"); 258 return 0; 259 } 260 *strchr(s, '/') = '\0'; 261 } 262 if(!ipstrtoaddr(s?s:str, port, addr, addrlen)) { 263 free(s); 264 log_err("cannot parse ip address: '%s'", str); 265 return 0; 266 } 267 if(s) { 268 free(s); 269 addr_mask(addr, *addrlen, *net); 270 } 271 return 1; 272 } 273 274 void 275 log_nametypeclass(enum verbosity_value v, const char* str, uint8_t* name, 276 uint16_t type, uint16_t dclass) 277 { 278 char buf[LDNS_MAX_DOMAINLEN+1]; 279 char t[12], c[12]; 280 const char *ts, *cs; 281 if(verbosity < v) 282 return; 283 dname_str(name, buf); 284 if(type == LDNS_RR_TYPE_TSIG) ts = "TSIG"; 285 else if(type == LDNS_RR_TYPE_IXFR) ts = "IXFR"; 286 else if(type == LDNS_RR_TYPE_AXFR) ts = "AXFR"; 287 else if(type == LDNS_RR_TYPE_MAILB) ts = "MAILB"; 288 else if(type == LDNS_RR_TYPE_MAILA) ts = "MAILA"; 289 else if(type == LDNS_RR_TYPE_ANY) ts = "ANY"; 290 else if(sldns_rr_descript(type) && sldns_rr_descript(type)->_name) 291 ts = sldns_rr_descript(type)->_name; 292 else { 293 snprintf(t, sizeof(t), "TYPE%d", (int)type); 294 ts = t; 295 } 296 if(sldns_lookup_by_id(sldns_rr_classes, (int)dclass) && 297 sldns_lookup_by_id(sldns_rr_classes, (int)dclass)->name) 298 cs = sldns_lookup_by_id(sldns_rr_classes, (int)dclass)->name; 299 else { 300 snprintf(c, sizeof(c), "CLASS%d", (int)dclass); 301 cs = c; 302 } 303 log_info("%s %s %s %s", str, buf, ts, cs); 304 } 305 306 void log_name_addr(enum verbosity_value v, const char* str, uint8_t* zone, 307 struct sockaddr_storage* addr, socklen_t addrlen) 308 { 309 uint16_t port; 310 const char* family = "unknown_family "; 311 char namebuf[LDNS_MAX_DOMAINLEN+1]; 312 char dest[100]; 313 int af = (int)((struct sockaddr_in*)addr)->sin_family; 314 void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 315 if(verbosity < v) 316 return; 317 switch(af) { 318 case AF_INET: family=""; break; 319 case AF_INET6: family=""; 320 sinaddr = &((struct sockaddr_in6*)addr)->sin6_addr; 321 break; 322 case AF_LOCAL: family="local "; break; 323 default: break; 324 } 325 if(inet_ntop(af, sinaddr, dest, (socklen_t)sizeof(dest)) == 0) { 326 (void)strlcpy(dest, "(inet_ntop error)", sizeof(dest)); 327 } 328 dest[sizeof(dest)-1] = 0; 329 port = ntohs(((struct sockaddr_in*)addr)->sin_port); 330 dname_str(zone, namebuf); 331 if(af != AF_INET && af != AF_INET6) 332 verbose(v, "%s <%s> %s%s#%d (addrlen %d)", 333 str, namebuf, family, dest, (int)port, (int)addrlen); 334 else verbose(v, "%s <%s> %s%s#%d", 335 str, namebuf, family, dest, (int)port); 336 } 337 338 void log_err_addr(const char* str, const char* err, 339 struct sockaddr_storage* addr, socklen_t addrlen) 340 { 341 uint16_t port; 342 char dest[100]; 343 int af = (int)((struct sockaddr_in*)addr)->sin_family; 344 void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 345 if(af == AF_INET6) 346 sinaddr = &((struct sockaddr_in6*)addr)->sin6_addr; 347 if(inet_ntop(af, sinaddr, dest, (socklen_t)sizeof(dest)) == 0) { 348 (void)strlcpy(dest, "(inet_ntop error)", sizeof(dest)); 349 } 350 dest[sizeof(dest)-1] = 0; 351 port = ntohs(((struct sockaddr_in*)addr)->sin_port); 352 if(verbosity >= 4) 353 log_err("%s: %s for %s port %d (len %d)", str, err, dest, 354 (int)port, (int)addrlen); 355 else log_err("%s: %s for %s", str, err, dest); 356 } 357 358 int 359 sockaddr_cmp(struct sockaddr_storage* addr1, socklen_t len1, 360 struct sockaddr_storage* addr2, socklen_t len2) 361 { 362 struct sockaddr_in* p1_in = (struct sockaddr_in*)addr1; 363 struct sockaddr_in* p2_in = (struct sockaddr_in*)addr2; 364 struct sockaddr_in6* p1_in6 = (struct sockaddr_in6*)addr1; 365 struct sockaddr_in6* p2_in6 = (struct sockaddr_in6*)addr2; 366 if(len1 < len2) 367 return -1; 368 if(len1 > len2) 369 return 1; 370 log_assert(len1 == len2); 371 if( p1_in->sin_family < p2_in->sin_family) 372 return -1; 373 if( p1_in->sin_family > p2_in->sin_family) 374 return 1; 375 log_assert( p1_in->sin_family == p2_in->sin_family ); 376 /* compare ip4 */ 377 if( p1_in->sin_family == AF_INET ) { 378 /* just order it, ntohs not required */ 379 if(p1_in->sin_port < p2_in->sin_port) 380 return -1; 381 if(p1_in->sin_port > p2_in->sin_port) 382 return 1; 383 log_assert(p1_in->sin_port == p2_in->sin_port); 384 return memcmp(&p1_in->sin_addr, &p2_in->sin_addr, INET_SIZE); 385 } else if (p1_in6->sin6_family == AF_INET6) { 386 /* just order it, ntohs not required */ 387 if(p1_in6->sin6_port < p2_in6->sin6_port) 388 return -1; 389 if(p1_in6->sin6_port > p2_in6->sin6_port) 390 return 1; 391 log_assert(p1_in6->sin6_port == p2_in6->sin6_port); 392 return memcmp(&p1_in6->sin6_addr, &p2_in6->sin6_addr, 393 INET6_SIZE); 394 } else { 395 /* eek unknown type, perform this comparison for sanity. */ 396 return memcmp(addr1, addr2, len1); 397 } 398 } 399 400 int 401 sockaddr_cmp_addr(struct sockaddr_storage* addr1, socklen_t len1, 402 struct sockaddr_storage* addr2, socklen_t len2) 403 { 404 struct sockaddr_in* p1_in = (struct sockaddr_in*)addr1; 405 struct sockaddr_in* p2_in = (struct sockaddr_in*)addr2; 406 struct sockaddr_in6* p1_in6 = (struct sockaddr_in6*)addr1; 407 struct sockaddr_in6* p2_in6 = (struct sockaddr_in6*)addr2; 408 if(len1 < len2) 409 return -1; 410 if(len1 > len2) 411 return 1; 412 log_assert(len1 == len2); 413 if( p1_in->sin_family < p2_in->sin_family) 414 return -1; 415 if( p1_in->sin_family > p2_in->sin_family) 416 return 1; 417 log_assert( p1_in->sin_family == p2_in->sin_family ); 418 /* compare ip4 */ 419 if( p1_in->sin_family == AF_INET ) { 420 return memcmp(&p1_in->sin_addr, &p2_in->sin_addr, INET_SIZE); 421 } else if (p1_in6->sin6_family == AF_INET6) { 422 return memcmp(&p1_in6->sin6_addr, &p2_in6->sin6_addr, 423 INET6_SIZE); 424 } else { 425 /* eek unknown type, perform this comparison for sanity. */ 426 return memcmp(addr1, addr2, len1); 427 } 428 } 429 430 int 431 addr_is_ip6(struct sockaddr_storage* addr, socklen_t len) 432 { 433 if(len == (socklen_t)sizeof(struct sockaddr_in6) && 434 ((struct sockaddr_in6*)addr)->sin6_family == AF_INET6) 435 return 1; 436 else return 0; 437 } 438 439 void 440 addr_mask(struct sockaddr_storage* addr, socklen_t len, int net) 441 { 442 uint8_t mask[8] = {0x0, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe}; 443 int i, max; 444 uint8_t* s; 445 if(addr_is_ip6(addr, len)) { 446 s = (uint8_t*)&((struct sockaddr_in6*)addr)->sin6_addr; 447 max = 128; 448 } else { 449 s = (uint8_t*)&((struct sockaddr_in*)addr)->sin_addr; 450 max = 32; 451 } 452 if(net >= max) 453 return; 454 for(i=net/8+1; i<max/8; i++) { 455 s[i] = 0; 456 } 457 s[net/8] &= mask[net&0x7]; 458 } 459 460 int 461 addr_in_common(struct sockaddr_storage* addr1, int net1, 462 struct sockaddr_storage* addr2, int net2, socklen_t addrlen) 463 { 464 int min = (net1<net2)?net1:net2; 465 int i, to; 466 int match = 0; 467 uint8_t* s1, *s2; 468 if(addr_is_ip6(addr1, addrlen)) { 469 s1 = (uint8_t*)&((struct sockaddr_in6*)addr1)->sin6_addr; 470 s2 = (uint8_t*)&((struct sockaddr_in6*)addr2)->sin6_addr; 471 to = 16; 472 } else { 473 s1 = (uint8_t*)&((struct sockaddr_in*)addr1)->sin_addr; 474 s2 = (uint8_t*)&((struct sockaddr_in*)addr2)->sin_addr; 475 to = 4; 476 } 477 /* match = bits_in_common(s1, s2, to); */ 478 for(i=0; i<to; i++) { 479 if(s1[i] == s2[i]) { 480 match += 8; 481 } else { 482 uint8_t z = s1[i]^s2[i]; 483 log_assert(z); 484 while(!(z&0x80)) { 485 match++; 486 z<<=1; 487 } 488 break; 489 } 490 } 491 if(match > min) match = min; 492 return match; 493 } 494 495 void 496 addr_to_str(struct sockaddr_storage* addr, socklen_t addrlen, 497 char* buf, size_t len) 498 { 499 int af = (int)((struct sockaddr_in*)addr)->sin_family; 500 void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 501 if(addr_is_ip6(addr, addrlen)) 502 sinaddr = &((struct sockaddr_in6*)addr)->sin6_addr; 503 if(inet_ntop(af, sinaddr, buf, (socklen_t)len) == 0) { 504 snprintf(buf, len, "(inet_ntop_error)"); 505 } 506 } 507 508 int 509 addr_is_ip4mapped(struct sockaddr_storage* addr, socklen_t addrlen) 510 { 511 /* prefix for ipv4 into ipv6 mapping is ::ffff:x.x.x.x */ 512 const uint8_t map_prefix[16] = 513 {0,0,0,0, 0,0,0,0, 0,0,0xff,0xff, 0,0,0,0}; 514 uint8_t* s; 515 if(!addr_is_ip6(addr, addrlen)) 516 return 0; 517 /* s is 16 octet ipv6 address string */ 518 s = (uint8_t*)&((struct sockaddr_in6*)addr)->sin6_addr; 519 return (memcmp(s, map_prefix, 12) == 0); 520 } 521 522 int addr_is_broadcast(struct sockaddr_storage* addr, socklen_t addrlen) 523 { 524 int af = (int)((struct sockaddr_in*)addr)->sin_family; 525 void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 526 return af == AF_INET && addrlen>=(socklen_t)sizeof(struct sockaddr_in) 527 && memcmp(sinaddr, "\377\377\377\377", 4) == 0; 528 } 529 530 int addr_is_any(struct sockaddr_storage* addr, socklen_t addrlen) 531 { 532 int af = (int)((struct sockaddr_in*)addr)->sin_family; 533 void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 534 void* sin6addr = &((struct sockaddr_in6*)addr)->sin6_addr; 535 if(af == AF_INET && addrlen>=(socklen_t)sizeof(struct sockaddr_in) 536 && memcmp(sinaddr, "\000\000\000\000", 4) == 0) 537 return 1; 538 else if(af==AF_INET6 && addrlen>=(socklen_t)sizeof(struct sockaddr_in6) 539 && memcmp(sin6addr, "\000\000\000\000\000\000\000\000" 540 "\000\000\000\000\000\000\000\000", 16) == 0) 541 return 1; 542 return 0; 543 } 544 545 void sock_list_insert(struct sock_list** list, struct sockaddr_storage* addr, 546 socklen_t len, struct regional* region) 547 { 548 struct sock_list* add = (struct sock_list*)regional_alloc(region, 549 sizeof(*add) - sizeof(add->addr) + (size_t)len); 550 if(!add) { 551 log_err("out of memory in socketlist insert"); 552 return; 553 } 554 log_assert(list); 555 add->next = *list; 556 add->len = len; 557 *list = add; 558 if(len) memmove(&add->addr, addr, len); 559 } 560 561 void sock_list_prepend(struct sock_list** list, struct sock_list* add) 562 { 563 struct sock_list* last = add; 564 if(!last) 565 return; 566 while(last->next) 567 last = last->next; 568 last->next = *list; 569 *list = add; 570 } 571 572 int sock_list_find(struct sock_list* list, struct sockaddr_storage* addr, 573 socklen_t len) 574 { 575 while(list) { 576 if(len == list->len) { 577 if(len == 0 || sockaddr_cmp_addr(addr, len, 578 &list->addr, list->len) == 0) 579 return 1; 580 } 581 list = list->next; 582 } 583 return 0; 584 } 585 586 void sock_list_merge(struct sock_list** list, struct regional* region, 587 struct sock_list* add) 588 { 589 struct sock_list* p; 590 for(p=add; p; p=p->next) { 591 if(!sock_list_find(*list, &p->addr, p->len)) 592 sock_list_insert(list, &p->addr, p->len, region); 593 } 594 } 595 596 void 597 log_crypto_err(const char* str) 598 { 599 #ifdef HAVE_SSL 600 /* error:[error code]:[library name]:[function name]:[reason string] */ 601 char buf[128]; 602 unsigned long e; 603 ERR_error_string_n(ERR_get_error(), buf, sizeof(buf)); 604 log_err("%s crypto %s", str, buf); 605 while( (e=ERR_get_error()) ) { 606 ERR_error_string_n(e, buf, sizeof(buf)); 607 log_err("and additionally crypto %s", buf); 608 } 609 #else 610 (void)str; 611 #endif /* HAVE_SSL */ 612 } 613 614 int 615 listen_sslctx_setup(void* ctxt) 616 { 617 #ifdef HAVE_SSL 618 SSL_CTX* ctx = (SSL_CTX*)ctxt; 619 /* no SSLv2, SSLv3 because has defects */ 620 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2) 621 != SSL_OP_NO_SSLv2){ 622 log_crypto_err("could not set SSL_OP_NO_SSLv2"); 623 return 0; 624 } 625 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv3) & SSL_OP_NO_SSLv3) 626 != SSL_OP_NO_SSLv3){ 627 log_crypto_err("could not set SSL_OP_NO_SSLv3"); 628 return 0; 629 } 630 #if defined(SSL_OP_NO_TLSv1) && defined(SSL_OP_NO_TLSv1_1) 631 /* if we have tls 1.1 disable 1.0 */ 632 if((SSL_CTX_set_options(ctx, SSL_OP_NO_TLSv1) & SSL_OP_NO_TLSv1) 633 != SSL_OP_NO_TLSv1){ 634 log_crypto_err("could not set SSL_OP_NO_TLSv1"); 635 return 0; 636 } 637 #endif 638 #if defined(SSL_OP_NO_TLSv1_1) && defined(SSL_OP_NO_TLSv1_2) 639 /* if we have tls 1.2 disable 1.1 */ 640 if((SSL_CTX_set_options(ctx, SSL_OP_NO_TLSv1_1) & SSL_OP_NO_TLSv1_1) 641 != SSL_OP_NO_TLSv1_1){ 642 log_crypto_err("could not set SSL_OP_NO_TLSv1_1"); 643 return 0; 644 } 645 #endif 646 #if defined(SHA256_DIGEST_LENGTH) && defined(USE_ECDSA) 647 /* if we have sha256, set the cipher list to have no known vulns */ 648 if(!SSL_CTX_set_cipher_list(ctx, "ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256")) 649 log_crypto_err("could not set cipher list with SSL_CTX_set_cipher_list"); 650 #endif 651 652 if((SSL_CTX_set_options(ctx, SSL_OP_CIPHER_SERVER_PREFERENCE) & 653 SSL_OP_CIPHER_SERVER_PREFERENCE) != 654 SSL_OP_CIPHER_SERVER_PREFERENCE) { 655 log_crypto_err("could not set SSL_OP_CIPHER_SERVER_PREFERENCE"); 656 return 0; 657 } 658 659 #ifdef HAVE_SSL_CTX_SET_SECURITY_LEVEL 660 SSL_CTX_set_security_level(ctx, 0); 661 #endif 662 #else 663 (void)ctxt; 664 #endif /* HAVE_SSL */ 665 return 1; 666 } 667 668 void 669 listen_sslctx_setup_2(void* ctxt) 670 { 671 #ifdef HAVE_SSL 672 SSL_CTX* ctx = (SSL_CTX*)ctxt; 673 (void)ctx; 674 #if HAVE_DECL_SSL_CTX_SET_ECDH_AUTO 675 if(!SSL_CTX_set_ecdh_auto(ctx,1)) { 676 log_crypto_err("Error in SSL_CTX_ecdh_auto, not enabling ECDHE"); 677 } 678 #elif defined(USE_ECDSA) 679 if(1) { 680 EC_KEY *ecdh = EC_KEY_new_by_curve_name (NID_X9_62_prime256v1); 681 if (!ecdh) { 682 log_crypto_err("could not find p256, not enabling ECDHE"); 683 } else { 684 if (1 != SSL_CTX_set_tmp_ecdh (ctx, ecdh)) { 685 log_crypto_err("Error in SSL_CTX_set_tmp_ecdh, not enabling ECDHE"); 686 } 687 EC_KEY_free (ecdh); 688 } 689 } 690 #endif 691 #else 692 (void)ctxt; 693 #endif /* HAVE_SSL */ 694 } 695 696 void* listen_sslctx_create(char* key, char* pem, char* verifypem) 697 { 698 #ifdef HAVE_SSL 699 SSL_CTX* ctx = SSL_CTX_new(SSLv23_server_method()); 700 if(!ctx) { 701 log_crypto_err("could not SSL_CTX_new"); 702 return NULL; 703 } 704 if(!listen_sslctx_setup(ctx)) { 705 SSL_CTX_free(ctx); 706 return NULL; 707 } 708 if(!SSL_CTX_use_certificate_chain_file(ctx, pem)) { 709 log_err("error for cert file: %s", pem); 710 log_crypto_err("error in SSL_CTX use_certificate_chain_file"); 711 SSL_CTX_free(ctx); 712 return NULL; 713 } 714 if(!SSL_CTX_use_PrivateKey_file(ctx, key, SSL_FILETYPE_PEM)) { 715 log_err("error for private key file: %s", key); 716 log_crypto_err("Error in SSL_CTX use_PrivateKey_file"); 717 SSL_CTX_free(ctx); 718 return NULL; 719 } 720 if(!SSL_CTX_check_private_key(ctx)) { 721 log_err("error for key file: %s", key); 722 log_crypto_err("Error in SSL_CTX check_private_key"); 723 SSL_CTX_free(ctx); 724 return NULL; 725 } 726 listen_sslctx_setup_2(ctx); 727 if(verifypem && verifypem[0]) { 728 if(!SSL_CTX_load_verify_locations(ctx, verifypem, NULL)) { 729 log_crypto_err("Error in SSL_CTX verify locations"); 730 SSL_CTX_free(ctx); 731 return NULL; 732 } 733 SSL_CTX_set_client_CA_list(ctx, SSL_load_client_CA_file( 734 verifypem)); 735 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL); 736 } 737 return ctx; 738 #else 739 (void)key; (void)pem; (void)verifypem; 740 return NULL; 741 #endif 742 } 743 744 void* connect_sslctx_create(char* key, char* pem, char* verifypem) 745 { 746 #ifdef HAVE_SSL 747 SSL_CTX* ctx = SSL_CTX_new(SSLv23_client_method()); 748 if(!ctx) { 749 log_crypto_err("could not allocate SSL_CTX pointer"); 750 return NULL; 751 } 752 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2) 753 != SSL_OP_NO_SSLv2) { 754 log_crypto_err("could not set SSL_OP_NO_SSLv2"); 755 SSL_CTX_free(ctx); 756 return NULL; 757 } 758 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv3) & SSL_OP_NO_SSLv3) 759 != SSL_OP_NO_SSLv3) { 760 log_crypto_err("could not set SSL_OP_NO_SSLv3"); 761 SSL_CTX_free(ctx); 762 return NULL; 763 } 764 if(key && key[0]) { 765 if(!SSL_CTX_use_certificate_chain_file(ctx, pem)) { 766 log_err("error in client certificate %s", pem); 767 log_crypto_err("error in certificate file"); 768 SSL_CTX_free(ctx); 769 return NULL; 770 } 771 if(!SSL_CTX_use_PrivateKey_file(ctx, key, SSL_FILETYPE_PEM)) { 772 log_err("error in client private key %s", key); 773 log_crypto_err("error in key file"); 774 SSL_CTX_free(ctx); 775 return NULL; 776 } 777 if(!SSL_CTX_check_private_key(ctx)) { 778 log_err("error in client key %s", key); 779 log_crypto_err("error in SSL_CTX_check_private_key"); 780 SSL_CTX_free(ctx); 781 return NULL; 782 } 783 } 784 if(verifypem && verifypem[0]) { 785 if(!SSL_CTX_load_verify_locations(ctx, verifypem, NULL)) { 786 log_crypto_err("error in SSL_CTX verify"); 787 SSL_CTX_free(ctx); 788 return NULL; 789 } 790 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL); 791 } 792 return ctx; 793 #else 794 (void)key; (void)pem; (void)verifypem; 795 return NULL; 796 #endif 797 } 798 799 void* incoming_ssl_fd(void* sslctx, int fd) 800 { 801 #ifdef HAVE_SSL 802 SSL* ssl = SSL_new((SSL_CTX*)sslctx); 803 if(!ssl) { 804 log_crypto_err("could not SSL_new"); 805 return NULL; 806 } 807 SSL_set_accept_state(ssl); 808 (void)SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY); 809 if(!SSL_set_fd(ssl, fd)) { 810 log_crypto_err("could not SSL_set_fd"); 811 SSL_free(ssl); 812 return NULL; 813 } 814 return ssl; 815 #else 816 (void)sslctx; (void)fd; 817 return NULL; 818 #endif 819 } 820 821 void* outgoing_ssl_fd(void* sslctx, int fd) 822 { 823 #ifdef HAVE_SSL 824 SSL* ssl = SSL_new((SSL_CTX*)sslctx); 825 if(!ssl) { 826 log_crypto_err("could not SSL_new"); 827 return NULL; 828 } 829 SSL_set_connect_state(ssl); 830 (void)SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY); 831 if(!SSL_set_fd(ssl, fd)) { 832 log_crypto_err("could not SSL_set_fd"); 833 SSL_free(ssl); 834 return NULL; 835 } 836 return ssl; 837 #else 838 (void)sslctx; (void)fd; 839 return NULL; 840 #endif 841 } 842 843 #if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED) && defined(CRYPTO_LOCK) && OPENSSL_VERSION_NUMBER < 0x10100000L 844 /** global lock list for openssl locks */ 845 static lock_basic_type *ub_openssl_locks = NULL; 846 847 /** callback that gets thread id for openssl */ 848 static unsigned long 849 ub_crypto_id_cb(void) 850 { 851 return (unsigned long)log_thread_get(); 852 } 853 854 static void 855 ub_crypto_lock_cb(int mode, int type, const char *ATTR_UNUSED(file), 856 int ATTR_UNUSED(line)) 857 { 858 if((mode&CRYPTO_LOCK)) { 859 lock_basic_lock(&ub_openssl_locks[type]); 860 } else { 861 lock_basic_unlock(&ub_openssl_locks[type]); 862 } 863 } 864 #endif /* OPENSSL_THREADS */ 865 866 int ub_openssl_lock_init(void) 867 { 868 #if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED) && defined(CRYPTO_LOCK) && OPENSSL_VERSION_NUMBER < 0x10100000L 869 int i; 870 ub_openssl_locks = (lock_basic_type*)reallocarray( 871 NULL, (size_t)CRYPTO_num_locks(), sizeof(lock_basic_type)); 872 if(!ub_openssl_locks) 873 return 0; 874 for(i=0; i<CRYPTO_num_locks(); i++) { 875 lock_basic_init(&ub_openssl_locks[i]); 876 } 877 CRYPTO_set_id_callback(&ub_crypto_id_cb); 878 CRYPTO_set_locking_callback(&ub_crypto_lock_cb); 879 #endif /* OPENSSL_THREADS */ 880 return 1; 881 } 882 883 void ub_openssl_lock_delete(void) 884 { 885 #if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED) && defined(CRYPTO_LOCK) && OPENSSL_VERSION_NUMBER < 0x10100000L 886 int i; 887 if(!ub_openssl_locks) 888 return; 889 CRYPTO_set_id_callback(NULL); 890 CRYPTO_set_locking_callback(NULL); 891 for(i=0; i<CRYPTO_num_locks(); i++) { 892 lock_basic_destroy(&ub_openssl_locks[i]); 893 } 894 free(ub_openssl_locks); 895 #endif /* OPENSSL_THREADS */ 896 } 897 898