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 /** store port number into sockaddr structure */ 275 void 276 sockaddr_store_port(struct sockaddr_storage* addr, socklen_t addrlen, int port) 277 { 278 if(addr_is_ip6(addr, addrlen)) { 279 struct sockaddr_in6* sa = (struct sockaddr_in6*)addr; 280 sa->sin6_port = (in_port_t)htons((uint16_t)port); 281 } else { 282 struct sockaddr_in* sa = (struct sockaddr_in*)addr; 283 sa->sin_port = (in_port_t)htons((uint16_t)port); 284 } 285 } 286 287 void 288 log_nametypeclass(enum verbosity_value v, const char* str, uint8_t* name, 289 uint16_t type, uint16_t dclass) 290 { 291 char buf[LDNS_MAX_DOMAINLEN+1]; 292 char t[12], c[12]; 293 const char *ts, *cs; 294 if(verbosity < v) 295 return; 296 dname_str(name, buf); 297 if(type == LDNS_RR_TYPE_TSIG) ts = "TSIG"; 298 else if(type == LDNS_RR_TYPE_IXFR) ts = "IXFR"; 299 else if(type == LDNS_RR_TYPE_AXFR) ts = "AXFR"; 300 else if(type == LDNS_RR_TYPE_MAILB) ts = "MAILB"; 301 else if(type == LDNS_RR_TYPE_MAILA) ts = "MAILA"; 302 else if(type == LDNS_RR_TYPE_ANY) ts = "ANY"; 303 else if(sldns_rr_descript(type) && sldns_rr_descript(type)->_name) 304 ts = sldns_rr_descript(type)->_name; 305 else { 306 snprintf(t, sizeof(t), "TYPE%d", (int)type); 307 ts = t; 308 } 309 if(sldns_lookup_by_id(sldns_rr_classes, (int)dclass) && 310 sldns_lookup_by_id(sldns_rr_classes, (int)dclass)->name) 311 cs = sldns_lookup_by_id(sldns_rr_classes, (int)dclass)->name; 312 else { 313 snprintf(c, sizeof(c), "CLASS%d", (int)dclass); 314 cs = c; 315 } 316 log_info("%s %s %s %s", str, buf, ts, cs); 317 } 318 319 void log_name_addr(enum verbosity_value v, const char* str, uint8_t* zone, 320 struct sockaddr_storage* addr, socklen_t addrlen) 321 { 322 uint16_t port; 323 const char* family = "unknown_family "; 324 char namebuf[LDNS_MAX_DOMAINLEN+1]; 325 char dest[100]; 326 int af = (int)((struct sockaddr_in*)addr)->sin_family; 327 void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 328 if(verbosity < v) 329 return; 330 switch(af) { 331 case AF_INET: family=""; break; 332 case AF_INET6: family=""; 333 sinaddr = &((struct sockaddr_in6*)addr)->sin6_addr; 334 break; 335 case AF_LOCAL: family="local "; break; 336 default: break; 337 } 338 if(inet_ntop(af, sinaddr, dest, (socklen_t)sizeof(dest)) == 0) { 339 (void)strlcpy(dest, "(inet_ntop error)", sizeof(dest)); 340 } 341 dest[sizeof(dest)-1] = 0; 342 port = ntohs(((struct sockaddr_in*)addr)->sin_port); 343 dname_str(zone, namebuf); 344 if(af != AF_INET && af != AF_INET6) 345 verbose(v, "%s <%s> %s%s#%d (addrlen %d)", 346 str, namebuf, family, dest, (int)port, (int)addrlen); 347 else verbose(v, "%s <%s> %s%s#%d", 348 str, namebuf, family, dest, (int)port); 349 } 350 351 void log_err_addr(const char* str, const char* err, 352 struct sockaddr_storage* addr, socklen_t addrlen) 353 { 354 uint16_t port; 355 char dest[100]; 356 int af = (int)((struct sockaddr_in*)addr)->sin_family; 357 void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 358 if(af == AF_INET6) 359 sinaddr = &((struct sockaddr_in6*)addr)->sin6_addr; 360 if(inet_ntop(af, sinaddr, dest, (socklen_t)sizeof(dest)) == 0) { 361 (void)strlcpy(dest, "(inet_ntop error)", sizeof(dest)); 362 } 363 dest[sizeof(dest)-1] = 0; 364 port = ntohs(((struct sockaddr_in*)addr)->sin_port); 365 if(verbosity >= 4) 366 log_err("%s: %s for %s port %d (len %d)", str, err, dest, 367 (int)port, (int)addrlen); 368 else log_err("%s: %s for %s", str, err, dest); 369 } 370 371 int 372 sockaddr_cmp(struct sockaddr_storage* addr1, socklen_t len1, 373 struct sockaddr_storage* addr2, socklen_t len2) 374 { 375 struct sockaddr_in* p1_in = (struct sockaddr_in*)addr1; 376 struct sockaddr_in* p2_in = (struct sockaddr_in*)addr2; 377 struct sockaddr_in6* p1_in6 = (struct sockaddr_in6*)addr1; 378 struct sockaddr_in6* p2_in6 = (struct sockaddr_in6*)addr2; 379 if(len1 < len2) 380 return -1; 381 if(len1 > len2) 382 return 1; 383 log_assert(len1 == len2); 384 if( p1_in->sin_family < p2_in->sin_family) 385 return -1; 386 if( p1_in->sin_family > p2_in->sin_family) 387 return 1; 388 log_assert( p1_in->sin_family == p2_in->sin_family ); 389 /* compare ip4 */ 390 if( p1_in->sin_family == AF_INET ) { 391 /* just order it, ntohs not required */ 392 if(p1_in->sin_port < p2_in->sin_port) 393 return -1; 394 if(p1_in->sin_port > p2_in->sin_port) 395 return 1; 396 log_assert(p1_in->sin_port == p2_in->sin_port); 397 return memcmp(&p1_in->sin_addr, &p2_in->sin_addr, INET_SIZE); 398 } else if (p1_in6->sin6_family == AF_INET6) { 399 /* just order it, ntohs not required */ 400 if(p1_in6->sin6_port < p2_in6->sin6_port) 401 return -1; 402 if(p1_in6->sin6_port > p2_in6->sin6_port) 403 return 1; 404 log_assert(p1_in6->sin6_port == p2_in6->sin6_port); 405 return memcmp(&p1_in6->sin6_addr, &p2_in6->sin6_addr, 406 INET6_SIZE); 407 } else { 408 /* eek unknown type, perform this comparison for sanity. */ 409 return memcmp(addr1, addr2, len1); 410 } 411 } 412 413 int 414 sockaddr_cmp_addr(struct sockaddr_storage* addr1, socklen_t len1, 415 struct sockaddr_storage* addr2, socklen_t len2) 416 { 417 struct sockaddr_in* p1_in = (struct sockaddr_in*)addr1; 418 struct sockaddr_in* p2_in = (struct sockaddr_in*)addr2; 419 struct sockaddr_in6* p1_in6 = (struct sockaddr_in6*)addr1; 420 struct sockaddr_in6* p2_in6 = (struct sockaddr_in6*)addr2; 421 if(len1 < len2) 422 return -1; 423 if(len1 > len2) 424 return 1; 425 log_assert(len1 == len2); 426 if( p1_in->sin_family < p2_in->sin_family) 427 return -1; 428 if( p1_in->sin_family > p2_in->sin_family) 429 return 1; 430 log_assert( p1_in->sin_family == p2_in->sin_family ); 431 /* compare ip4 */ 432 if( p1_in->sin_family == AF_INET ) { 433 return memcmp(&p1_in->sin_addr, &p2_in->sin_addr, INET_SIZE); 434 } else if (p1_in6->sin6_family == AF_INET6) { 435 return memcmp(&p1_in6->sin6_addr, &p2_in6->sin6_addr, 436 INET6_SIZE); 437 } else { 438 /* eek unknown type, perform this comparison for sanity. */ 439 return memcmp(addr1, addr2, len1); 440 } 441 } 442 443 int 444 addr_is_ip6(struct sockaddr_storage* addr, socklen_t len) 445 { 446 if(len == (socklen_t)sizeof(struct sockaddr_in6) && 447 ((struct sockaddr_in6*)addr)->sin6_family == AF_INET6) 448 return 1; 449 else return 0; 450 } 451 452 void 453 addr_mask(struct sockaddr_storage* addr, socklen_t len, int net) 454 { 455 uint8_t mask[8] = {0x0, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe}; 456 int i, max; 457 uint8_t* s; 458 if(addr_is_ip6(addr, len)) { 459 s = (uint8_t*)&((struct sockaddr_in6*)addr)->sin6_addr; 460 max = 128; 461 } else { 462 s = (uint8_t*)&((struct sockaddr_in*)addr)->sin_addr; 463 max = 32; 464 } 465 if(net >= max) 466 return; 467 for(i=net/8+1; i<max/8; i++) { 468 s[i] = 0; 469 } 470 s[net/8] &= mask[net&0x7]; 471 } 472 473 int 474 addr_in_common(struct sockaddr_storage* addr1, int net1, 475 struct sockaddr_storage* addr2, int net2, socklen_t addrlen) 476 { 477 int min = (net1<net2)?net1:net2; 478 int i, to; 479 int match = 0; 480 uint8_t* s1, *s2; 481 if(addr_is_ip6(addr1, addrlen)) { 482 s1 = (uint8_t*)&((struct sockaddr_in6*)addr1)->sin6_addr; 483 s2 = (uint8_t*)&((struct sockaddr_in6*)addr2)->sin6_addr; 484 to = 16; 485 } else { 486 s1 = (uint8_t*)&((struct sockaddr_in*)addr1)->sin_addr; 487 s2 = (uint8_t*)&((struct sockaddr_in*)addr2)->sin_addr; 488 to = 4; 489 } 490 /* match = bits_in_common(s1, s2, to); */ 491 for(i=0; i<to; i++) { 492 if(s1[i] == s2[i]) { 493 match += 8; 494 } else { 495 uint8_t z = s1[i]^s2[i]; 496 log_assert(z); 497 while(!(z&0x80)) { 498 match++; 499 z<<=1; 500 } 501 break; 502 } 503 } 504 if(match > min) match = min; 505 return match; 506 } 507 508 void 509 addr_to_str(struct sockaddr_storage* addr, socklen_t addrlen, 510 char* buf, size_t len) 511 { 512 int af = (int)((struct sockaddr_in*)addr)->sin_family; 513 void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 514 if(addr_is_ip6(addr, addrlen)) 515 sinaddr = &((struct sockaddr_in6*)addr)->sin6_addr; 516 if(inet_ntop(af, sinaddr, buf, (socklen_t)len) == 0) { 517 snprintf(buf, len, "(inet_ntop_error)"); 518 } 519 } 520 521 int 522 addr_is_ip4mapped(struct sockaddr_storage* addr, socklen_t addrlen) 523 { 524 /* prefix for ipv4 into ipv6 mapping is ::ffff:x.x.x.x */ 525 const uint8_t map_prefix[16] = 526 {0,0,0,0, 0,0,0,0, 0,0,0xff,0xff, 0,0,0,0}; 527 uint8_t* s; 528 if(!addr_is_ip6(addr, addrlen)) 529 return 0; 530 /* s is 16 octet ipv6 address string */ 531 s = (uint8_t*)&((struct sockaddr_in6*)addr)->sin6_addr; 532 return (memcmp(s, map_prefix, 12) == 0); 533 } 534 535 int addr_is_broadcast(struct sockaddr_storage* addr, socklen_t addrlen) 536 { 537 int af = (int)((struct sockaddr_in*)addr)->sin_family; 538 void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 539 return af == AF_INET && addrlen>=(socklen_t)sizeof(struct sockaddr_in) 540 && memcmp(sinaddr, "\377\377\377\377", 4) == 0; 541 } 542 543 int addr_is_any(struct sockaddr_storage* addr, socklen_t addrlen) 544 { 545 int af = (int)((struct sockaddr_in*)addr)->sin_family; 546 void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 547 void* sin6addr = &((struct sockaddr_in6*)addr)->sin6_addr; 548 if(af == AF_INET && addrlen>=(socklen_t)sizeof(struct sockaddr_in) 549 && memcmp(sinaddr, "\000\000\000\000", 4) == 0) 550 return 1; 551 else if(af==AF_INET6 && addrlen>=(socklen_t)sizeof(struct sockaddr_in6) 552 && memcmp(sin6addr, "\000\000\000\000\000\000\000\000" 553 "\000\000\000\000\000\000\000\000", 16) == 0) 554 return 1; 555 return 0; 556 } 557 558 void sock_list_insert(struct sock_list** list, struct sockaddr_storage* addr, 559 socklen_t len, struct regional* region) 560 { 561 struct sock_list* add = (struct sock_list*)regional_alloc(region, 562 sizeof(*add) - sizeof(add->addr) + (size_t)len); 563 if(!add) { 564 log_err("out of memory in socketlist insert"); 565 return; 566 } 567 log_assert(list); 568 add->next = *list; 569 add->len = len; 570 *list = add; 571 if(len) memmove(&add->addr, addr, len); 572 } 573 574 void sock_list_prepend(struct sock_list** list, struct sock_list* add) 575 { 576 struct sock_list* last = add; 577 if(!last) 578 return; 579 while(last->next) 580 last = last->next; 581 last->next = *list; 582 *list = add; 583 } 584 585 int sock_list_find(struct sock_list* list, struct sockaddr_storage* addr, 586 socklen_t len) 587 { 588 while(list) { 589 if(len == list->len) { 590 if(len == 0 || sockaddr_cmp_addr(addr, len, 591 &list->addr, list->len) == 0) 592 return 1; 593 } 594 list = list->next; 595 } 596 return 0; 597 } 598 599 void sock_list_merge(struct sock_list** list, struct regional* region, 600 struct sock_list* add) 601 { 602 struct sock_list* p; 603 for(p=add; p; p=p->next) { 604 if(!sock_list_find(*list, &p->addr, p->len)) 605 sock_list_insert(list, &p->addr, p->len, region); 606 } 607 } 608 609 void 610 log_crypto_err(const char* str) 611 { 612 #ifdef HAVE_SSL 613 /* error:[error code]:[library name]:[function name]:[reason string] */ 614 char buf[128]; 615 unsigned long e; 616 ERR_error_string_n(ERR_get_error(), buf, sizeof(buf)); 617 log_err("%s crypto %s", str, buf); 618 while( (e=ERR_get_error()) ) { 619 ERR_error_string_n(e, buf, sizeof(buf)); 620 log_err("and additionally crypto %s", buf); 621 } 622 #else 623 (void)str; 624 #endif /* HAVE_SSL */ 625 } 626 627 int 628 listen_sslctx_setup(void* ctxt) 629 { 630 #ifdef HAVE_SSL 631 SSL_CTX* ctx = (SSL_CTX*)ctxt; 632 /* no SSLv2, SSLv3 because has defects */ 633 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2) 634 != SSL_OP_NO_SSLv2){ 635 log_crypto_err("could not set SSL_OP_NO_SSLv2"); 636 return 0; 637 } 638 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv3) & SSL_OP_NO_SSLv3) 639 != SSL_OP_NO_SSLv3){ 640 log_crypto_err("could not set SSL_OP_NO_SSLv3"); 641 return 0; 642 } 643 #if defined(SSL_OP_NO_TLSv1) && defined(SSL_OP_NO_TLSv1_1) 644 /* if we have tls 1.1 disable 1.0 */ 645 if((SSL_CTX_set_options(ctx, SSL_OP_NO_TLSv1) & SSL_OP_NO_TLSv1) 646 != SSL_OP_NO_TLSv1){ 647 log_crypto_err("could not set SSL_OP_NO_TLSv1"); 648 return 0; 649 } 650 #endif 651 #if defined(SSL_OP_NO_TLSv1_1) && defined(SSL_OP_NO_TLSv1_2) 652 /* if we have tls 1.2 disable 1.1 */ 653 if((SSL_CTX_set_options(ctx, SSL_OP_NO_TLSv1_1) & SSL_OP_NO_TLSv1_1) 654 != SSL_OP_NO_TLSv1_1){ 655 log_crypto_err("could not set SSL_OP_NO_TLSv1_1"); 656 return 0; 657 } 658 #endif 659 #if defined(SHA256_DIGEST_LENGTH) && defined(USE_ECDSA) 660 /* if we have sha256, set the cipher list to have no known vulns */ 661 if(!SSL_CTX_set_cipher_list(ctx, "TLS13-CHACHA20-POLY1305-SHA256:TLS13-AES-256-GCM-SHA384:TLS13-AES-128-GCM-SHA256: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")) 662 log_crypto_err("could not set cipher list with SSL_CTX_set_cipher_list"); 663 #endif 664 665 if((SSL_CTX_set_options(ctx, SSL_OP_CIPHER_SERVER_PREFERENCE) & 666 SSL_OP_CIPHER_SERVER_PREFERENCE) != 667 SSL_OP_CIPHER_SERVER_PREFERENCE) { 668 log_crypto_err("could not set SSL_OP_CIPHER_SERVER_PREFERENCE"); 669 return 0; 670 } 671 672 #ifdef HAVE_SSL_CTX_SET_SECURITY_LEVEL 673 SSL_CTX_set_security_level(ctx, 0); 674 #endif 675 #else 676 (void)ctxt; 677 #endif /* HAVE_SSL */ 678 return 1; 679 } 680 681 void 682 listen_sslctx_setup_2(void* ctxt) 683 { 684 #ifdef HAVE_SSL 685 SSL_CTX* ctx = (SSL_CTX*)ctxt; 686 (void)ctx; 687 #if HAVE_DECL_SSL_CTX_SET_ECDH_AUTO 688 if(!SSL_CTX_set_ecdh_auto(ctx,1)) { 689 log_crypto_err("Error in SSL_CTX_ecdh_auto, not enabling ECDHE"); 690 } 691 #elif defined(USE_ECDSA) 692 if(1) { 693 EC_KEY *ecdh = EC_KEY_new_by_curve_name (NID_X9_62_prime256v1); 694 if (!ecdh) { 695 log_crypto_err("could not find p256, not enabling ECDHE"); 696 } else { 697 if (1 != SSL_CTX_set_tmp_ecdh (ctx, ecdh)) { 698 log_crypto_err("Error in SSL_CTX_set_tmp_ecdh, not enabling ECDHE"); 699 } 700 EC_KEY_free (ecdh); 701 } 702 } 703 #endif 704 #else 705 (void)ctxt; 706 #endif /* HAVE_SSL */ 707 } 708 709 void* listen_sslctx_create(char* key, char* pem, char* verifypem) 710 { 711 #ifdef HAVE_SSL 712 SSL_CTX* ctx = SSL_CTX_new(SSLv23_server_method()); 713 if(!ctx) { 714 log_crypto_err("could not SSL_CTX_new"); 715 return NULL; 716 } 717 if(!listen_sslctx_setup(ctx)) { 718 SSL_CTX_free(ctx); 719 return NULL; 720 } 721 if(!SSL_CTX_use_certificate_chain_file(ctx, pem)) { 722 log_err("error for cert file: %s", pem); 723 log_crypto_err("error in SSL_CTX use_certificate_chain_file"); 724 SSL_CTX_free(ctx); 725 return NULL; 726 } 727 if(!SSL_CTX_use_PrivateKey_file(ctx, key, SSL_FILETYPE_PEM)) { 728 log_err("error for private key file: %s", key); 729 log_crypto_err("Error in SSL_CTX use_PrivateKey_file"); 730 SSL_CTX_free(ctx); 731 return NULL; 732 } 733 if(!SSL_CTX_check_private_key(ctx)) { 734 log_err("error for key file: %s", key); 735 log_crypto_err("Error in SSL_CTX check_private_key"); 736 SSL_CTX_free(ctx); 737 return NULL; 738 } 739 listen_sslctx_setup_2(ctx); 740 if(verifypem && verifypem[0]) { 741 if(!SSL_CTX_load_verify_locations(ctx, verifypem, NULL)) { 742 log_crypto_err("Error in SSL_CTX verify locations"); 743 SSL_CTX_free(ctx); 744 return NULL; 745 } 746 SSL_CTX_set_client_CA_list(ctx, SSL_load_client_CA_file( 747 verifypem)); 748 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL); 749 } 750 return ctx; 751 #else 752 (void)key; (void)pem; (void)verifypem; 753 return NULL; 754 #endif 755 } 756 757 void* connect_sslctx_create(char* key, char* pem, char* verifypem) 758 { 759 #ifdef HAVE_SSL 760 SSL_CTX* ctx = SSL_CTX_new(SSLv23_client_method()); 761 if(!ctx) { 762 log_crypto_err("could not allocate SSL_CTX pointer"); 763 return NULL; 764 } 765 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2) 766 != SSL_OP_NO_SSLv2) { 767 log_crypto_err("could not set SSL_OP_NO_SSLv2"); 768 SSL_CTX_free(ctx); 769 return NULL; 770 } 771 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv3) & SSL_OP_NO_SSLv3) 772 != SSL_OP_NO_SSLv3) { 773 log_crypto_err("could not set SSL_OP_NO_SSLv3"); 774 SSL_CTX_free(ctx); 775 return NULL; 776 } 777 if(key && key[0]) { 778 if(!SSL_CTX_use_certificate_chain_file(ctx, pem)) { 779 log_err("error in client certificate %s", pem); 780 log_crypto_err("error in certificate file"); 781 SSL_CTX_free(ctx); 782 return NULL; 783 } 784 if(!SSL_CTX_use_PrivateKey_file(ctx, key, SSL_FILETYPE_PEM)) { 785 log_err("error in client private key %s", key); 786 log_crypto_err("error in key file"); 787 SSL_CTX_free(ctx); 788 return NULL; 789 } 790 if(!SSL_CTX_check_private_key(ctx)) { 791 log_err("error in client key %s", key); 792 log_crypto_err("error in SSL_CTX_check_private_key"); 793 SSL_CTX_free(ctx); 794 return NULL; 795 } 796 } 797 if(verifypem && verifypem[0]) { 798 if(!SSL_CTX_load_verify_locations(ctx, verifypem, NULL)) { 799 log_crypto_err("error in SSL_CTX verify"); 800 SSL_CTX_free(ctx); 801 return NULL; 802 } 803 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL); 804 } 805 return ctx; 806 #else 807 (void)key; (void)pem; (void)verifypem; 808 return NULL; 809 #endif 810 } 811 812 void* incoming_ssl_fd(void* sslctx, int fd) 813 { 814 #ifdef HAVE_SSL 815 SSL* ssl = SSL_new((SSL_CTX*)sslctx); 816 if(!ssl) { 817 log_crypto_err("could not SSL_new"); 818 return NULL; 819 } 820 SSL_set_accept_state(ssl); 821 (void)SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY); 822 if(!SSL_set_fd(ssl, fd)) { 823 log_crypto_err("could not SSL_set_fd"); 824 SSL_free(ssl); 825 return NULL; 826 } 827 return ssl; 828 #else 829 (void)sslctx; (void)fd; 830 return NULL; 831 #endif 832 } 833 834 void* outgoing_ssl_fd(void* sslctx, int fd) 835 { 836 #ifdef HAVE_SSL 837 SSL* ssl = SSL_new((SSL_CTX*)sslctx); 838 if(!ssl) { 839 log_crypto_err("could not SSL_new"); 840 return NULL; 841 } 842 SSL_set_connect_state(ssl); 843 (void)SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY); 844 if(!SSL_set_fd(ssl, fd)) { 845 log_crypto_err("could not SSL_set_fd"); 846 SSL_free(ssl); 847 return NULL; 848 } 849 return ssl; 850 #else 851 (void)sslctx; (void)fd; 852 return NULL; 853 #endif 854 } 855 856 #if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED) && defined(CRYPTO_LOCK) && OPENSSL_VERSION_NUMBER < 0x10100000L 857 /** global lock list for openssl locks */ 858 static lock_basic_type *ub_openssl_locks = NULL; 859 860 /** callback that gets thread id for openssl */ 861 static unsigned long 862 ub_crypto_id_cb(void) 863 { 864 return (unsigned long)log_thread_get(); 865 } 866 867 static void 868 ub_crypto_lock_cb(int mode, int type, const char *ATTR_UNUSED(file), 869 int ATTR_UNUSED(line)) 870 { 871 if((mode&CRYPTO_LOCK)) { 872 lock_basic_lock(&ub_openssl_locks[type]); 873 } else { 874 lock_basic_unlock(&ub_openssl_locks[type]); 875 } 876 } 877 #endif /* OPENSSL_THREADS */ 878 879 int ub_openssl_lock_init(void) 880 { 881 #if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED) && defined(CRYPTO_LOCK) && OPENSSL_VERSION_NUMBER < 0x10100000L 882 int i; 883 ub_openssl_locks = (lock_basic_type*)reallocarray( 884 NULL, (size_t)CRYPTO_num_locks(), sizeof(lock_basic_type)); 885 if(!ub_openssl_locks) 886 return 0; 887 for(i=0; i<CRYPTO_num_locks(); i++) { 888 lock_basic_init(&ub_openssl_locks[i]); 889 } 890 CRYPTO_set_id_callback(&ub_crypto_id_cb); 891 CRYPTO_set_locking_callback(&ub_crypto_lock_cb); 892 #endif /* OPENSSL_THREADS */ 893 return 1; 894 } 895 896 void ub_openssl_lock_delete(void) 897 { 898 #if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED) && defined(CRYPTO_LOCK) && OPENSSL_VERSION_NUMBER < 0x10100000L 899 int i; 900 if(!ub_openssl_locks) 901 return; 902 CRYPTO_set_id_callback(NULL); 903 CRYPTO_set_locking_callback(NULL); 904 for(i=0; i<CRYPTO_num_locks(); i++) { 905 lock_basic_destroy(&ub_openssl_locks[i]); 906 } 907 free(ub_openssl_locks); 908 #endif /* OPENSSL_THREADS */ 909 } 910 911