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 #ifdef HAVE_SYS_TYPES_H 42 # include <sys/types.h> 43 #endif 44 #ifdef HAVE_NET_IF_H 45 #include <net/if.h> 46 #endif 47 #include "util/net_help.h" 48 #include "util/log.h" 49 #include "util/data/dname.h" 50 #include "util/module.h" 51 #include "util/regional.h" 52 #include "util/config_file.h" 53 #include "sldns/parseutil.h" 54 #include "sldns/wire2str.h" 55 #include <fcntl.h> 56 #ifdef HAVE_OPENSSL_SSL_H 57 #include <openssl/ssl.h> 58 #include <openssl/evp.h> 59 #include <openssl/rand.h> 60 #endif 61 #ifdef HAVE_OPENSSL_ERR_H 62 #include <openssl/err.h> 63 #endif 64 #ifdef HAVE_OPENSSL_CORE_NAMES_H 65 #include <openssl/core_names.h> 66 #endif 67 #ifdef USE_WINSOCK 68 #include <wincrypt.h> 69 #endif 70 #ifdef HAVE_NGHTTP2_NGHTTP2_H 71 #include <nghttp2/nghttp2.h> 72 #endif 73 74 /** max length of an IP address (the address portion) that we allow */ 75 #define MAX_ADDR_STRLEN 128 /* characters */ 76 /** default value for EDNS ADVERTISED size */ 77 uint16_t EDNS_ADVERTISED_SIZE = 4096; 78 79 /** minimal responses when positive answer: default is no */ 80 int MINIMAL_RESPONSES = 0; 81 82 /** rrset order roundrobin: default is yes */ 83 int RRSET_ROUNDROBIN = 1; 84 85 /** log tag queries with name instead of 'info' for filtering */ 86 int LOG_TAG_QUERYREPLY = 0; 87 88 static struct tls_session_ticket_key { 89 unsigned char *key_name; 90 unsigned char *aes_key; 91 unsigned char *hmac_key; 92 } *ticket_keys; 93 94 #ifdef HAVE_SSL 95 /** 96 * callback TLS session ticket encrypt and decrypt 97 * For use with SSL_CTX_set_tlsext_ticket_key_cb or 98 * SSL_CTX_set_tlsext_ticket_key_evp_cb 99 * @param s: the SSL_CTX to use (from connect_sslctx_create()) 100 * @param key_name: secret name, 16 bytes 101 * @param iv: up to EVP_MAX_IV_LENGTH. 102 * @param evp_ctx: the evp cipher context, function sets this. 103 * @param hmac_ctx: the hmac context, function sets this. 104 * with ..key_cb it is of type HMAC_CTX* 105 * with ..key_evp_cb it is of type EVP_MAC_CTX* 106 * @param enc: 1 is encrypt, 0 is decrypt 107 * @return 0 on no ticket, 1 for okay, and 2 for okay but renew the ticket 108 * (the ticket is decrypt only). and <0 for failures. 109 */ 110 int tls_session_ticket_key_cb(SSL *s, unsigned char* key_name, 111 unsigned char* iv, EVP_CIPHER_CTX *evp_ctx, 112 #ifdef HAVE_SSL_CTX_SET_TLSEXT_TICKET_KEY_EVP_CB 113 EVP_MAC_CTX *hmac_ctx, 114 #else 115 HMAC_CTX* hmac_ctx, 116 #endif 117 int enc); 118 #endif /* HAVE_SSL */ 119 120 /* returns true is string addr is an ip6 specced address */ 121 int 122 str_is_ip6(const char* str) 123 { 124 if(strchr(str, ':')) 125 return 1; 126 else return 0; 127 } 128 129 int 130 fd_set_nonblock(int s) 131 { 132 #ifdef HAVE_FCNTL 133 int flag; 134 if((flag = fcntl(s, F_GETFL)) == -1) { 135 log_err("can't fcntl F_GETFL: %s", strerror(errno)); 136 flag = 0; 137 } 138 flag |= O_NONBLOCK; 139 if(fcntl(s, F_SETFL, flag) == -1) { 140 log_err("can't fcntl F_SETFL: %s", strerror(errno)); 141 return 0; 142 } 143 #elif defined(HAVE_IOCTLSOCKET) 144 unsigned long on = 1; 145 if(ioctlsocket(s, FIONBIO, &on) != 0) { 146 log_err("can't ioctlsocket FIONBIO on: %s", 147 wsa_strerror(WSAGetLastError())); 148 } 149 #endif 150 return 1; 151 } 152 153 int 154 fd_set_block(int s) 155 { 156 #ifdef HAVE_FCNTL 157 int flag; 158 if((flag = fcntl(s, F_GETFL)) == -1) { 159 log_err("cannot fcntl F_GETFL: %s", strerror(errno)); 160 flag = 0; 161 } 162 flag &= ~O_NONBLOCK; 163 if(fcntl(s, F_SETFL, flag) == -1) { 164 log_err("cannot fcntl F_SETFL: %s", strerror(errno)); 165 return 0; 166 } 167 #elif defined(HAVE_IOCTLSOCKET) 168 unsigned long off = 0; 169 if(ioctlsocket(s, FIONBIO, &off) != 0) { 170 if(WSAGetLastError() != WSAEINVAL || verbosity >= 4) 171 log_err("can't ioctlsocket FIONBIO off: %s", 172 wsa_strerror(WSAGetLastError())); 173 } 174 #endif 175 return 1; 176 } 177 178 int 179 is_pow2(size_t num) 180 { 181 if(num == 0) return 1; 182 return (num & (num-1)) == 0; 183 } 184 185 void* 186 memdup(void* data, size_t len) 187 { 188 void* d; 189 if(!data) return NULL; 190 if(len == 0) return NULL; 191 d = malloc(len); 192 if(!d) return NULL; 193 memcpy(d, data, len); 194 return d; 195 } 196 197 void 198 log_addr(enum verbosity_value v, const char* str, 199 struct sockaddr_storage* addr, socklen_t addrlen) 200 { 201 uint16_t port; 202 const char* family = "unknown"; 203 char dest[100]; 204 int af = (int)((struct sockaddr_in*)addr)->sin_family; 205 void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 206 if(verbosity < v) 207 return; 208 switch(af) { 209 case AF_INET: family="ip4"; break; 210 case AF_INET6: family="ip6"; 211 sinaddr = &((struct sockaddr_in6*)addr)->sin6_addr; 212 break; 213 case AF_LOCAL: 214 dest[0]=0; 215 (void)inet_ntop(af, sinaddr, dest, 216 (socklen_t)sizeof(dest)); 217 verbose(v, "%s local %s", str, dest); 218 return; /* do not continue and try to get port */ 219 default: break; 220 } 221 if(inet_ntop(af, sinaddr, dest, (socklen_t)sizeof(dest)) == 0) { 222 (void)strlcpy(dest, "(inet_ntop error)", sizeof(dest)); 223 } 224 dest[sizeof(dest)-1] = 0; 225 port = ntohs(((struct sockaddr_in*)addr)->sin_port); 226 if(verbosity >= 4) 227 verbose(v, "%s %s %s port %d (len %d)", str, family, dest, 228 (int)port, (int)addrlen); 229 else verbose(v, "%s %s port %d", str, dest, (int)port); 230 } 231 232 int 233 extstrtoaddr(const char* str, struct sockaddr_storage* addr, 234 socklen_t* addrlen) 235 { 236 char* s; 237 int port = UNBOUND_DNS_PORT; 238 if((s=strchr(str, '@'))) { 239 char buf[MAX_ADDR_STRLEN]; 240 if(s-str >= MAX_ADDR_STRLEN) { 241 return 0; 242 } 243 (void)strlcpy(buf, str, sizeof(buf)); 244 buf[s-str] = 0; 245 port = atoi(s+1); 246 if(port == 0 && strcmp(s+1,"0")!=0) { 247 return 0; 248 } 249 return ipstrtoaddr(buf, port, addr, addrlen); 250 } 251 return ipstrtoaddr(str, port, addr, addrlen); 252 } 253 254 255 int 256 ipstrtoaddr(const char* ip, int port, struct sockaddr_storage* addr, 257 socklen_t* addrlen) 258 { 259 uint16_t p; 260 if(!ip) return 0; 261 p = (uint16_t) port; 262 if(str_is_ip6(ip)) { 263 char buf[MAX_ADDR_STRLEN]; 264 char* s; 265 struct sockaddr_in6* sa = (struct sockaddr_in6*)addr; 266 *addrlen = (socklen_t)sizeof(struct sockaddr_in6); 267 memset(sa, 0, *addrlen); 268 sa->sin6_family = AF_INET6; 269 sa->sin6_port = (in_port_t)htons(p); 270 if((s=strchr(ip, '%'))) { /* ip6%interface, rfc 4007 */ 271 if(s-ip >= MAX_ADDR_STRLEN) 272 return 0; 273 (void)strlcpy(buf, ip, sizeof(buf)); 274 buf[s-ip]=0; 275 #ifdef HAVE_IF_NAMETOINDEX 276 if (!(sa->sin6_scope_id = if_nametoindex(s+1))) 277 #endif /* HAVE_IF_NAMETOINDEX */ 278 sa->sin6_scope_id = (uint32_t)atoi(s+1); 279 ip = buf; 280 } 281 if(inet_pton((int)sa->sin6_family, ip, &sa->sin6_addr) <= 0) { 282 return 0; 283 } 284 } else { /* ip4 */ 285 struct sockaddr_in* sa = (struct sockaddr_in*)addr; 286 *addrlen = (socklen_t)sizeof(struct sockaddr_in); 287 memset(sa, 0, *addrlen); 288 sa->sin_family = AF_INET; 289 sa->sin_port = (in_port_t)htons(p); 290 if(inet_pton((int)sa->sin_family, ip, &sa->sin_addr) <= 0) { 291 return 0; 292 } 293 } 294 return 1; 295 } 296 297 int netblockstrtoaddr(const char* str, int port, struct sockaddr_storage* addr, 298 socklen_t* addrlen, int* net) 299 { 300 char buf[64]; 301 char* s; 302 *net = (str_is_ip6(str)?128:32); 303 if((s=strchr(str, '/'))) { 304 if(atoi(s+1) > *net) { 305 log_err("netblock too large: %s", str); 306 return 0; 307 } 308 *net = atoi(s+1); 309 if(*net == 0 && strcmp(s+1, "0") != 0) { 310 log_err("cannot parse netblock: '%s'", str); 311 return 0; 312 } 313 strlcpy(buf, str, sizeof(buf)); 314 s = strchr(buf, '/'); 315 if(s) *s = 0; 316 s = buf; 317 } 318 if(!ipstrtoaddr(s?s:str, port, addr, addrlen)) { 319 log_err("cannot parse ip address: '%s'", str); 320 return 0; 321 } 322 if(s) { 323 addr_mask(addr, *addrlen, *net); 324 } 325 return 1; 326 } 327 328 /* RPZ format address dname to network byte order address */ 329 static int ipdnametoaddr(uint8_t* dname, size_t dnamelen, 330 struct sockaddr_storage* addr, socklen_t* addrlen, int* af) 331 { 332 uint8_t* ia; 333 int dnamelabs = dname_count_labels(dname); 334 uint8_t lablen; 335 char* e = NULL; 336 int z = 0; 337 size_t len = 0; 338 int i; 339 *af = AF_INET; 340 341 /* need 1 byte for label length */ 342 if(dnamelen < 1) 343 return 0; 344 345 if(dnamelabs > 6 || 346 dname_has_label(dname, dnamelen, (uint8_t*)"\002zz")) { 347 *af = AF_INET6; 348 } 349 len = *dname; 350 lablen = *dname++; 351 i = (*af == AF_INET) ? 3 : 15; 352 if(*af == AF_INET6) { 353 struct sockaddr_in6* sa = (struct sockaddr_in6*)addr; 354 *addrlen = (socklen_t)sizeof(struct sockaddr_in6); 355 memset(sa, 0, *addrlen); 356 sa->sin6_family = AF_INET6; 357 ia = (uint8_t*)&sa->sin6_addr; 358 } else { /* ip4 */ 359 struct sockaddr_in* sa = (struct sockaddr_in*)addr; 360 *addrlen = (socklen_t)sizeof(struct sockaddr_in); 361 memset(sa, 0, *addrlen); 362 sa->sin_family = AF_INET; 363 ia = (uint8_t*)&sa->sin_addr; 364 } 365 while(lablen && i >= 0 && len <= dnamelen) { 366 char buff[LDNS_MAX_LABELLEN+1]; 367 uint16_t chunk; /* big enough to not overflow on IPv6 hextet */ 368 if((*af == AF_INET && (lablen > 3 || dnamelabs > 6)) || 369 (*af == AF_INET6 && (lablen > 4 || dnamelabs > 10))) { 370 return 0; 371 } 372 if(memcmp(dname, "zz", 2) == 0 && *af == AF_INET6) { 373 /* Add one or more 0 labels. Address is initialised at 374 * 0, so just skip the zero part. */ 375 int zl = 11 - dnamelabs; 376 if(z || zl < 0) 377 return 0; 378 z = 1; 379 i -= (zl*2); 380 } else { 381 memcpy(buff, dname, lablen); 382 buff[lablen] = '\0'; 383 chunk = strtol(buff, &e, (*af == AF_INET) ? 10 : 16); 384 if(!e || *e != '\0' || (*af == AF_INET && chunk > 255)) 385 return 0; 386 if(*af == AF_INET) { 387 log_assert(i < 4 && i >= 0); 388 ia[i] = (uint8_t)chunk; 389 i--; 390 } else { 391 log_assert(i < 16 && i >= 1); 392 /* ia in network byte order */ 393 ia[i-1] = (uint8_t)(chunk >> 8); 394 ia[i] = (uint8_t)(chunk & 0x00FF); 395 i -= 2; 396 } 397 } 398 dname += lablen; 399 lablen = *dname++; 400 len += lablen; 401 } 402 if(i != -1) 403 /* input too short */ 404 return 0; 405 return 1; 406 } 407 408 int netblockdnametoaddr(uint8_t* dname, size_t dnamelen, 409 struct sockaddr_storage* addr, socklen_t* addrlen, int* net, int* af) 410 { 411 char buff[3 /* 3 digit netblock */ + 1]; 412 size_t nlablen; 413 if(dnamelen < 1 || *dname > 3) 414 /* netblock invalid */ 415 return 0; 416 nlablen = *dname; 417 418 if(dnamelen < 1 + nlablen) 419 return 0; 420 421 memcpy(buff, dname+1, nlablen); 422 buff[nlablen] = '\0'; 423 *net = atoi(buff); 424 if(*net == 0 && strcmp(buff, "0") != 0) 425 return 0; 426 dname += nlablen; 427 dname++; 428 if(!ipdnametoaddr(dname, dnamelen-1-nlablen, addr, addrlen, af)) 429 return 0; 430 if((*af == AF_INET6 && *net > 128) || (*af == AF_INET && *net > 32)) 431 return 0; 432 return 1; 433 } 434 435 int authextstrtoaddr(char* str, struct sockaddr_storage* addr, 436 socklen_t* addrlen, char** auth_name) 437 { 438 char* s; 439 int port = UNBOUND_DNS_PORT; 440 if((s=strchr(str, '@'))) { 441 char buf[MAX_ADDR_STRLEN]; 442 size_t len = (size_t)(s-str); 443 char* hash = strchr(s+1, '#'); 444 if(hash) { 445 *auth_name = hash+1; 446 } else { 447 *auth_name = NULL; 448 } 449 if(len >= MAX_ADDR_STRLEN) { 450 return 0; 451 } 452 (void)strlcpy(buf, str, sizeof(buf)); 453 buf[len] = 0; 454 port = atoi(s+1); 455 if(port == 0) { 456 if(!hash && strcmp(s+1,"0")!=0) 457 return 0; 458 if(hash && strncmp(s+1,"0#",2)!=0) 459 return 0; 460 } 461 return ipstrtoaddr(buf, port, addr, addrlen); 462 } 463 if((s=strchr(str, '#'))) { 464 char buf[MAX_ADDR_STRLEN]; 465 size_t len = (size_t)(s-str); 466 if(len >= MAX_ADDR_STRLEN) { 467 return 0; 468 } 469 (void)strlcpy(buf, str, sizeof(buf)); 470 buf[len] = 0; 471 port = UNBOUND_DNS_OVER_TLS_PORT; 472 *auth_name = s+1; 473 return ipstrtoaddr(buf, port, addr, addrlen); 474 } 475 *auth_name = NULL; 476 return ipstrtoaddr(str, port, addr, addrlen); 477 } 478 479 /** store port number into sockaddr structure */ 480 void 481 sockaddr_store_port(struct sockaddr_storage* addr, socklen_t addrlen, int port) 482 { 483 if(addr_is_ip6(addr, addrlen)) { 484 struct sockaddr_in6* sa = (struct sockaddr_in6*)addr; 485 sa->sin6_port = (in_port_t)htons((uint16_t)port); 486 } else { 487 struct sockaddr_in* sa = (struct sockaddr_in*)addr; 488 sa->sin_port = (in_port_t)htons((uint16_t)port); 489 } 490 } 491 492 void 493 log_nametypeclass(enum verbosity_value v, const char* str, uint8_t* name, 494 uint16_t type, uint16_t dclass) 495 { 496 char buf[LDNS_MAX_DOMAINLEN+1]; 497 char t[12], c[12]; 498 const char *ts, *cs; 499 if(verbosity < v) 500 return; 501 dname_str(name, buf); 502 if(type == LDNS_RR_TYPE_TSIG) ts = "TSIG"; 503 else if(type == LDNS_RR_TYPE_IXFR) ts = "IXFR"; 504 else if(type == LDNS_RR_TYPE_AXFR) ts = "AXFR"; 505 else if(type == LDNS_RR_TYPE_MAILB) ts = "MAILB"; 506 else if(type == LDNS_RR_TYPE_MAILA) ts = "MAILA"; 507 else if(type == LDNS_RR_TYPE_ANY) ts = "ANY"; 508 else if(sldns_rr_descript(type) && sldns_rr_descript(type)->_name) 509 ts = sldns_rr_descript(type)->_name; 510 else { 511 snprintf(t, sizeof(t), "TYPE%d", (int)type); 512 ts = t; 513 } 514 if(sldns_lookup_by_id(sldns_rr_classes, (int)dclass) && 515 sldns_lookup_by_id(sldns_rr_classes, (int)dclass)->name) 516 cs = sldns_lookup_by_id(sldns_rr_classes, (int)dclass)->name; 517 else { 518 snprintf(c, sizeof(c), "CLASS%d", (int)dclass); 519 cs = c; 520 } 521 log_info("%s %s %s %s", str, buf, ts, cs); 522 } 523 524 void 525 log_query_in(const char* str, uint8_t* name, uint16_t type, uint16_t dclass) 526 { 527 char buf[LDNS_MAX_DOMAINLEN+1]; 528 char t[12], c[12]; 529 const char *ts, *cs; 530 dname_str(name, buf); 531 if(type == LDNS_RR_TYPE_TSIG) ts = "TSIG"; 532 else if(type == LDNS_RR_TYPE_IXFR) ts = "IXFR"; 533 else if(type == LDNS_RR_TYPE_AXFR) ts = "AXFR"; 534 else if(type == LDNS_RR_TYPE_MAILB) ts = "MAILB"; 535 else if(type == LDNS_RR_TYPE_MAILA) ts = "MAILA"; 536 else if(type == LDNS_RR_TYPE_ANY) ts = "ANY"; 537 else if(sldns_rr_descript(type) && sldns_rr_descript(type)->_name) 538 ts = sldns_rr_descript(type)->_name; 539 else { 540 snprintf(t, sizeof(t), "TYPE%d", (int)type); 541 ts = t; 542 } 543 if(sldns_lookup_by_id(sldns_rr_classes, (int)dclass) && 544 sldns_lookup_by_id(sldns_rr_classes, (int)dclass)->name) 545 cs = sldns_lookup_by_id(sldns_rr_classes, (int)dclass)->name; 546 else { 547 snprintf(c, sizeof(c), "CLASS%d", (int)dclass); 548 cs = c; 549 } 550 if(LOG_TAG_QUERYREPLY) 551 log_query("%s %s %s %s", str, buf, ts, cs); 552 else log_info("%s %s %s %s", str, buf, ts, cs); 553 } 554 555 void log_name_addr(enum verbosity_value v, const char* str, uint8_t* zone, 556 struct sockaddr_storage* addr, socklen_t addrlen) 557 { 558 uint16_t port; 559 const char* family = "unknown_family "; 560 char namebuf[LDNS_MAX_DOMAINLEN+1]; 561 char dest[100]; 562 int af = (int)((struct sockaddr_in*)addr)->sin_family; 563 void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 564 if(verbosity < v) 565 return; 566 switch(af) { 567 case AF_INET: family=""; break; 568 case AF_INET6: family=""; 569 sinaddr = &((struct sockaddr_in6*)addr)->sin6_addr; 570 break; 571 case AF_LOCAL: family="local "; break; 572 default: break; 573 } 574 if(inet_ntop(af, sinaddr, dest, (socklen_t)sizeof(dest)) == 0) { 575 (void)strlcpy(dest, "(inet_ntop error)", sizeof(dest)); 576 } 577 dest[sizeof(dest)-1] = 0; 578 port = ntohs(((struct sockaddr_in*)addr)->sin_port); 579 dname_str(zone, namebuf); 580 if(af != AF_INET && af != AF_INET6) 581 verbose(v, "%s <%s> %s%s#%d (addrlen %d)", 582 str, namebuf, family, dest, (int)port, (int)addrlen); 583 else verbose(v, "%s <%s> %s%s#%d", 584 str, namebuf, family, dest, (int)port); 585 } 586 587 void log_err_addr(const char* str, const char* err, 588 struct sockaddr_storage* addr, socklen_t addrlen) 589 { 590 uint16_t port; 591 char dest[100]; 592 int af = (int)((struct sockaddr_in*)addr)->sin_family; 593 void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 594 if(af == AF_INET6) 595 sinaddr = &((struct sockaddr_in6*)addr)->sin6_addr; 596 if(inet_ntop(af, sinaddr, dest, (socklen_t)sizeof(dest)) == 0) { 597 (void)strlcpy(dest, "(inet_ntop error)", sizeof(dest)); 598 } 599 dest[sizeof(dest)-1] = 0; 600 port = ntohs(((struct sockaddr_in*)addr)->sin_port); 601 if(verbosity >= 4) 602 log_err("%s: %s for %s port %d (len %d)", str, err, dest, 603 (int)port, (int)addrlen); 604 else log_err("%s: %s for %s port %d", str, err, dest, (int)port); 605 } 606 607 int 608 sockaddr_cmp(struct sockaddr_storage* addr1, socklen_t len1, 609 struct sockaddr_storage* addr2, socklen_t len2) 610 { 611 struct sockaddr_in* p1_in = (struct sockaddr_in*)addr1; 612 struct sockaddr_in* p2_in = (struct sockaddr_in*)addr2; 613 struct sockaddr_in6* p1_in6 = (struct sockaddr_in6*)addr1; 614 struct sockaddr_in6* p2_in6 = (struct sockaddr_in6*)addr2; 615 if(len1 < len2) 616 return -1; 617 if(len1 > len2) 618 return 1; 619 log_assert(len1 == len2); 620 if( p1_in->sin_family < p2_in->sin_family) 621 return -1; 622 if( p1_in->sin_family > p2_in->sin_family) 623 return 1; 624 log_assert( p1_in->sin_family == p2_in->sin_family ); 625 /* compare ip4 */ 626 if( p1_in->sin_family == AF_INET ) { 627 /* just order it, ntohs not required */ 628 if(p1_in->sin_port < p2_in->sin_port) 629 return -1; 630 if(p1_in->sin_port > p2_in->sin_port) 631 return 1; 632 log_assert(p1_in->sin_port == p2_in->sin_port); 633 return memcmp(&p1_in->sin_addr, &p2_in->sin_addr, INET_SIZE); 634 } else if (p1_in6->sin6_family == AF_INET6) { 635 /* just order it, ntohs not required */ 636 if(p1_in6->sin6_port < p2_in6->sin6_port) 637 return -1; 638 if(p1_in6->sin6_port > p2_in6->sin6_port) 639 return 1; 640 log_assert(p1_in6->sin6_port == p2_in6->sin6_port); 641 return memcmp(&p1_in6->sin6_addr, &p2_in6->sin6_addr, 642 INET6_SIZE); 643 } else { 644 /* eek unknown type, perform this comparison for sanity. */ 645 return memcmp(addr1, addr2, len1); 646 } 647 } 648 649 int 650 sockaddr_cmp_addr(struct sockaddr_storage* addr1, socklen_t len1, 651 struct sockaddr_storage* addr2, socklen_t len2) 652 { 653 struct sockaddr_in* p1_in = (struct sockaddr_in*)addr1; 654 struct sockaddr_in* p2_in = (struct sockaddr_in*)addr2; 655 struct sockaddr_in6* p1_in6 = (struct sockaddr_in6*)addr1; 656 struct sockaddr_in6* p2_in6 = (struct sockaddr_in6*)addr2; 657 if(len1 < len2) 658 return -1; 659 if(len1 > len2) 660 return 1; 661 log_assert(len1 == len2); 662 if( p1_in->sin_family < p2_in->sin_family) 663 return -1; 664 if( p1_in->sin_family > p2_in->sin_family) 665 return 1; 666 log_assert( p1_in->sin_family == p2_in->sin_family ); 667 /* compare ip4 */ 668 if( p1_in->sin_family == AF_INET ) { 669 return memcmp(&p1_in->sin_addr, &p2_in->sin_addr, INET_SIZE); 670 } else if (p1_in6->sin6_family == AF_INET6) { 671 return memcmp(&p1_in6->sin6_addr, &p2_in6->sin6_addr, 672 INET6_SIZE); 673 } else { 674 /* eek unknown type, perform this comparison for sanity. */ 675 return memcmp(addr1, addr2, len1); 676 } 677 } 678 679 int 680 addr_is_ip6(struct sockaddr_storage* addr, socklen_t len) 681 { 682 if(len == (socklen_t)sizeof(struct sockaddr_in6) && 683 ((struct sockaddr_in6*)addr)->sin6_family == AF_INET6) 684 return 1; 685 else return 0; 686 } 687 688 void 689 addr_mask(struct sockaddr_storage* addr, socklen_t len, int net) 690 { 691 uint8_t mask[8] = {0x0, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe}; 692 int i, max; 693 uint8_t* s; 694 if(addr_is_ip6(addr, len)) { 695 s = (uint8_t*)&((struct sockaddr_in6*)addr)->sin6_addr; 696 max = 128; 697 } else { 698 s = (uint8_t*)&((struct sockaddr_in*)addr)->sin_addr; 699 max = 32; 700 } 701 if(net >= max) 702 return; 703 for(i=net/8+1; i<max/8; i++) { 704 s[i] = 0; 705 } 706 s[net/8] &= mask[net&0x7]; 707 } 708 709 int 710 addr_in_common(struct sockaddr_storage* addr1, int net1, 711 struct sockaddr_storage* addr2, int net2, socklen_t addrlen) 712 { 713 int min = (net1<net2)?net1:net2; 714 int i, to; 715 int match = 0; 716 uint8_t* s1, *s2; 717 if(addr_is_ip6(addr1, addrlen)) { 718 s1 = (uint8_t*)&((struct sockaddr_in6*)addr1)->sin6_addr; 719 s2 = (uint8_t*)&((struct sockaddr_in6*)addr2)->sin6_addr; 720 to = 16; 721 } else { 722 s1 = (uint8_t*)&((struct sockaddr_in*)addr1)->sin_addr; 723 s2 = (uint8_t*)&((struct sockaddr_in*)addr2)->sin_addr; 724 to = 4; 725 } 726 /* match = bits_in_common(s1, s2, to); */ 727 for(i=0; i<to; i++) { 728 if(s1[i] == s2[i]) { 729 match += 8; 730 } else { 731 uint8_t z = s1[i]^s2[i]; 732 log_assert(z); 733 while(!(z&0x80)) { 734 match++; 735 z<<=1; 736 } 737 break; 738 } 739 } 740 if(match > min) match = min; 741 return match; 742 } 743 744 void 745 addr_to_str(struct sockaddr_storage* addr, socklen_t addrlen, 746 char* buf, size_t len) 747 { 748 int af = (int)((struct sockaddr_in*)addr)->sin_family; 749 void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 750 if(addr_is_ip6(addr, addrlen)) 751 sinaddr = &((struct sockaddr_in6*)addr)->sin6_addr; 752 if(inet_ntop(af, sinaddr, buf, (socklen_t)len) == 0) { 753 snprintf(buf, len, "(inet_ntop_error)"); 754 } 755 } 756 757 int 758 addr_is_ip4mapped(struct sockaddr_storage* addr, socklen_t addrlen) 759 { 760 /* prefix for ipv4 into ipv6 mapping is ::ffff:x.x.x.x */ 761 const uint8_t map_prefix[16] = 762 {0,0,0,0, 0,0,0,0, 0,0,0xff,0xff, 0,0,0,0}; 763 uint8_t* s; 764 if(!addr_is_ip6(addr, addrlen)) 765 return 0; 766 /* s is 16 octet ipv6 address string */ 767 s = (uint8_t*)&((struct sockaddr_in6*)addr)->sin6_addr; 768 return (memcmp(s, map_prefix, 12) == 0); 769 } 770 771 int addr_is_broadcast(struct sockaddr_storage* addr, socklen_t addrlen) 772 { 773 int af = (int)((struct sockaddr_in*)addr)->sin_family; 774 void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 775 return af == AF_INET && addrlen>=(socklen_t)sizeof(struct sockaddr_in) 776 && memcmp(sinaddr, "\377\377\377\377", 4) == 0; 777 } 778 779 int addr_is_any(struct sockaddr_storage* addr, socklen_t addrlen) 780 { 781 int af = (int)((struct sockaddr_in*)addr)->sin_family; 782 void* sinaddr = &((struct sockaddr_in*)addr)->sin_addr; 783 void* sin6addr = &((struct sockaddr_in6*)addr)->sin6_addr; 784 if(af == AF_INET && addrlen>=(socklen_t)sizeof(struct sockaddr_in) 785 && memcmp(sinaddr, "\000\000\000\000", 4) == 0) 786 return 1; 787 else if(af==AF_INET6 && addrlen>=(socklen_t)sizeof(struct sockaddr_in6) 788 && memcmp(sin6addr, "\000\000\000\000\000\000\000\000" 789 "\000\000\000\000\000\000\000\000", 16) == 0) 790 return 1; 791 return 0; 792 } 793 794 void sock_list_insert(struct sock_list** list, struct sockaddr_storage* addr, 795 socklen_t len, struct regional* region) 796 { 797 struct sock_list* add = (struct sock_list*)regional_alloc(region, 798 sizeof(*add) - sizeof(add->addr) + (size_t)len); 799 if(!add) { 800 log_err("out of memory in socketlist insert"); 801 return; 802 } 803 log_assert(list); 804 add->next = *list; 805 add->len = len; 806 *list = add; 807 if(len) memmove(&add->addr, addr, len); 808 } 809 810 void sock_list_prepend(struct sock_list** list, struct sock_list* add) 811 { 812 struct sock_list* last = add; 813 if(!last) 814 return; 815 while(last->next) 816 last = last->next; 817 last->next = *list; 818 *list = add; 819 } 820 821 int sock_list_find(struct sock_list* list, struct sockaddr_storage* addr, 822 socklen_t len) 823 { 824 while(list) { 825 if(len == list->len) { 826 if(len == 0 || sockaddr_cmp_addr(addr, len, 827 &list->addr, list->len) == 0) 828 return 1; 829 } 830 list = list->next; 831 } 832 return 0; 833 } 834 835 void sock_list_merge(struct sock_list** list, struct regional* region, 836 struct sock_list* add) 837 { 838 struct sock_list* p; 839 for(p=add; p; p=p->next) { 840 if(!sock_list_find(*list, &p->addr, p->len)) 841 sock_list_insert(list, &p->addr, p->len, region); 842 } 843 } 844 845 void 846 log_crypto_err(const char* str) 847 { 848 #ifdef HAVE_SSL 849 log_crypto_err_code(str, ERR_get_error()); 850 #else 851 (void)str; 852 #endif /* HAVE_SSL */ 853 } 854 855 void log_crypto_err_code(const char* str, unsigned long err) 856 { 857 #ifdef HAVE_SSL 858 /* error:[error code]:[library name]:[function name]:[reason string] */ 859 char buf[128]; 860 unsigned long e; 861 ERR_error_string_n(err, buf, sizeof(buf)); 862 log_err("%s crypto %s", str, buf); 863 while( (e=ERR_get_error()) ) { 864 ERR_error_string_n(e, buf, sizeof(buf)); 865 log_err("and additionally crypto %s", buf); 866 } 867 #else 868 (void)str; 869 (void)err; 870 #endif /* HAVE_SSL */ 871 } 872 873 #ifdef HAVE_SSL 874 /** log certificate details */ 875 void 876 log_cert(unsigned level, const char* str, void* cert) 877 { 878 BIO* bio; 879 char nul = 0; 880 char* pp = NULL; 881 long len; 882 if(verbosity < level) return; 883 bio = BIO_new(BIO_s_mem()); 884 if(!bio) return; 885 X509_print_ex(bio, (X509*)cert, 0, (unsigned long)-1 886 ^(X509_FLAG_NO_SUBJECT 887 |X509_FLAG_NO_ISSUER|X509_FLAG_NO_VALIDITY 888 |X509_FLAG_NO_EXTENSIONS|X509_FLAG_NO_AUX 889 |X509_FLAG_NO_ATTRIBUTES)); 890 BIO_write(bio, &nul, (int)sizeof(nul)); 891 len = BIO_get_mem_data(bio, &pp); 892 if(len != 0 && pp) { 893 /* reduce size of cert printout */ 894 char* s; 895 while((s=strstr(pp, " "))!=NULL) 896 memmove(s, s+1, strlen(s+1)+1); 897 while((s=strstr(pp, "\t\t"))!=NULL) 898 memmove(s, s+1, strlen(s+1)+1); 899 verbose(level, "%s: \n%s", str, pp); 900 } 901 BIO_free(bio); 902 } 903 #endif /* HAVE_SSL */ 904 905 #if defined(HAVE_SSL) && defined(HAVE_NGHTTP2) && defined(HAVE_SSL_CTX_SET_ALPN_SELECT_CB) 906 static int alpn_select_cb(SSL* ATTR_UNUSED(ssl), const unsigned char** out, 907 unsigned char* outlen, const unsigned char* in, unsigned int inlen, 908 void* ATTR_UNUSED(arg)) 909 { 910 int rv = nghttp2_select_next_protocol((unsigned char **)out, outlen, in, 911 inlen); 912 if(rv == -1) { 913 return SSL_TLSEXT_ERR_NOACK; 914 } 915 /* either http/1.1 or h2 selected */ 916 return SSL_TLSEXT_ERR_OK; 917 } 918 #endif 919 920 int 921 listen_sslctx_setup(void* ctxt) 922 { 923 #ifdef HAVE_SSL 924 SSL_CTX* ctx = (SSL_CTX*)ctxt; 925 /* no SSLv2, SSLv3 because has defects */ 926 #if SSL_OP_NO_SSLv2 != 0 927 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2) 928 != SSL_OP_NO_SSLv2){ 929 log_crypto_err("could not set SSL_OP_NO_SSLv2"); 930 return 0; 931 } 932 #endif 933 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv3) & SSL_OP_NO_SSLv3) 934 != SSL_OP_NO_SSLv3){ 935 log_crypto_err("could not set SSL_OP_NO_SSLv3"); 936 return 0; 937 } 938 #if defined(SSL_OP_NO_TLSv1) && defined(SSL_OP_NO_TLSv1_1) 939 /* if we have tls 1.1 disable 1.0 */ 940 if((SSL_CTX_set_options(ctx, SSL_OP_NO_TLSv1) & SSL_OP_NO_TLSv1) 941 != SSL_OP_NO_TLSv1){ 942 log_crypto_err("could not set SSL_OP_NO_TLSv1"); 943 return 0; 944 } 945 #endif 946 #if defined(SSL_OP_NO_TLSv1_1) && defined(SSL_OP_NO_TLSv1_2) 947 /* if we have tls 1.2 disable 1.1 */ 948 if((SSL_CTX_set_options(ctx, SSL_OP_NO_TLSv1_1) & SSL_OP_NO_TLSv1_1) 949 != SSL_OP_NO_TLSv1_1){ 950 log_crypto_err("could not set SSL_OP_NO_TLSv1_1"); 951 return 0; 952 } 953 #endif 954 #if defined(SSL_OP_NO_RENEGOTIATION) 955 /* disable client renegotiation */ 956 if((SSL_CTX_set_options(ctx, SSL_OP_NO_RENEGOTIATION) & 957 SSL_OP_NO_RENEGOTIATION) != SSL_OP_NO_RENEGOTIATION) { 958 log_crypto_err("could not set SSL_OP_NO_RENEGOTIATION"); 959 return 0; 960 } 961 #endif 962 #if defined(SHA256_DIGEST_LENGTH) && defined(USE_ECDSA) 963 /* if we detect system-wide crypto policies, use those */ 964 if (access( "/etc/crypto-policies/config", F_OK ) != 0 ) { 965 /* if we have sha256, set the cipher list to have no known vulns */ 966 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")) 967 log_crypto_err("could not set cipher list with SSL_CTX_set_cipher_list"); 968 } 969 #endif 970 971 if((SSL_CTX_set_options(ctx, SSL_OP_CIPHER_SERVER_PREFERENCE) & 972 SSL_OP_CIPHER_SERVER_PREFERENCE) != 973 SSL_OP_CIPHER_SERVER_PREFERENCE) { 974 log_crypto_err("could not set SSL_OP_CIPHER_SERVER_PREFERENCE"); 975 return 0; 976 } 977 978 #ifdef HAVE_SSL_CTX_SET_SECURITY_LEVEL 979 SSL_CTX_set_security_level(ctx, 0); 980 #endif 981 #if defined(HAVE_SSL_CTX_SET_ALPN_SELECT_CB) && defined(HAVE_NGHTTP2) 982 SSL_CTX_set_alpn_select_cb(ctx, alpn_select_cb, NULL); 983 #endif 984 #else 985 (void)ctxt; 986 #endif /* HAVE_SSL */ 987 return 1; 988 } 989 990 void 991 listen_sslctx_setup_2(void* ctxt) 992 { 993 #ifdef HAVE_SSL 994 SSL_CTX* ctx = (SSL_CTX*)ctxt; 995 (void)ctx; 996 #if HAVE_DECL_SSL_CTX_SET_ECDH_AUTO 997 if(!SSL_CTX_set_ecdh_auto(ctx,1)) { 998 log_crypto_err("Error in SSL_CTX_ecdh_auto, not enabling ECDHE"); 999 } 1000 #elif defined(USE_ECDSA) 1001 if(1) { 1002 EC_KEY *ecdh = EC_KEY_new_by_curve_name (NID_X9_62_prime256v1); 1003 if (!ecdh) { 1004 log_crypto_err("could not find p256, not enabling ECDHE"); 1005 } else { 1006 if (1 != SSL_CTX_set_tmp_ecdh (ctx, ecdh)) { 1007 log_crypto_err("Error in SSL_CTX_set_tmp_ecdh, not enabling ECDHE"); 1008 } 1009 EC_KEY_free (ecdh); 1010 } 1011 } 1012 #endif 1013 #else 1014 (void)ctxt; 1015 #endif /* HAVE_SSL */ 1016 } 1017 1018 void* listen_sslctx_create(char* key, char* pem, char* verifypem) 1019 { 1020 #ifdef HAVE_SSL 1021 SSL_CTX* ctx = SSL_CTX_new(SSLv23_server_method()); 1022 if(!ctx) { 1023 log_crypto_err("could not SSL_CTX_new"); 1024 return NULL; 1025 } 1026 if(!key || key[0] == 0) { 1027 log_err("error: no tls-service-key file specified"); 1028 SSL_CTX_free(ctx); 1029 return NULL; 1030 } 1031 if(!pem || pem[0] == 0) { 1032 log_err("error: no tls-service-pem file specified"); 1033 SSL_CTX_free(ctx); 1034 return NULL; 1035 } 1036 if(!listen_sslctx_setup(ctx)) { 1037 SSL_CTX_free(ctx); 1038 return NULL; 1039 } 1040 if(!SSL_CTX_use_certificate_chain_file(ctx, pem)) { 1041 log_err("error for cert file: %s", pem); 1042 log_crypto_err("error in SSL_CTX use_certificate_chain_file"); 1043 SSL_CTX_free(ctx); 1044 return NULL; 1045 } 1046 if(!SSL_CTX_use_PrivateKey_file(ctx, key, SSL_FILETYPE_PEM)) { 1047 log_err("error for private key file: %s", key); 1048 log_crypto_err("Error in SSL_CTX use_PrivateKey_file"); 1049 SSL_CTX_free(ctx); 1050 return NULL; 1051 } 1052 if(!SSL_CTX_check_private_key(ctx)) { 1053 log_err("error for key file: %s", key); 1054 log_crypto_err("Error in SSL_CTX check_private_key"); 1055 SSL_CTX_free(ctx); 1056 return NULL; 1057 } 1058 listen_sslctx_setup_2(ctx); 1059 if(verifypem && verifypem[0]) { 1060 if(!SSL_CTX_load_verify_locations(ctx, verifypem, NULL)) { 1061 log_crypto_err("Error in SSL_CTX verify locations"); 1062 SSL_CTX_free(ctx); 1063 return NULL; 1064 } 1065 SSL_CTX_set_client_CA_list(ctx, SSL_load_client_CA_file( 1066 verifypem)); 1067 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT, NULL); 1068 } 1069 return ctx; 1070 #else 1071 (void)key; (void)pem; (void)verifypem; 1072 return NULL; 1073 #endif 1074 } 1075 1076 #ifdef USE_WINSOCK 1077 /* For windows, the CA trust store is not read by openssl. 1078 Add code to open the trust store using wincrypt API and add 1079 the root certs into openssl trust store */ 1080 static int 1081 add_WIN_cacerts_to_openssl_store(SSL_CTX* tls_ctx) 1082 { 1083 HCERTSTORE hSystemStore; 1084 PCCERT_CONTEXT pTargetCert = NULL; 1085 X509_STORE* store; 1086 1087 verbose(VERB_ALGO, "Adding Windows certificates from system root store to CA store"); 1088 1089 /* load just once per context lifetime for this version 1090 TODO: dynamically update CA trust changes as they are available */ 1091 if (!tls_ctx) 1092 return 0; 1093 1094 /* Call wincrypt's CertOpenStore to open the CA root store. */ 1095 1096 if ((hSystemStore = CertOpenStore( 1097 CERT_STORE_PROV_SYSTEM, 1098 0, 1099 0, 1100 /* NOTE: mingw does not have this const: replace with 1 << 16 from code 1101 CERT_SYSTEM_STORE_CURRENT_USER, */ 1102 1 << 16, 1103 L"root")) == 0) 1104 { 1105 return 0; 1106 } 1107 1108 store = SSL_CTX_get_cert_store(tls_ctx); 1109 if (!store) 1110 return 0; 1111 1112 /* failure if the CA store is empty or the call fails */ 1113 if ((pTargetCert = CertEnumCertificatesInStore( 1114 hSystemStore, pTargetCert)) == 0) { 1115 verbose(VERB_ALGO, "CA certificate store for Windows is empty."); 1116 return 0; 1117 } 1118 /* iterate over the windows cert store and add to openssl store */ 1119 do 1120 { 1121 X509 *cert1 = d2i_X509(NULL, 1122 (const unsigned char **)&pTargetCert->pbCertEncoded, 1123 pTargetCert->cbCertEncoded); 1124 if (!cert1) { 1125 /* return error if a cert fails */ 1126 verbose(VERB_ALGO, "%s %d:%s", 1127 "Unable to parse certificate in memory", 1128 (int)ERR_get_error(), ERR_error_string(ERR_get_error(), NULL)); 1129 return 0; 1130 } 1131 else { 1132 /* return error if a cert add to store fails */ 1133 if (X509_STORE_add_cert(store, cert1) == 0) { 1134 unsigned long error = ERR_peek_last_error(); 1135 1136 /* Ignore error X509_R_CERT_ALREADY_IN_HASH_TABLE which means the 1137 * certificate is already in the store. */ 1138 if(ERR_GET_LIB(error) != ERR_LIB_X509 || 1139 ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE) { 1140 verbose(VERB_ALGO, "%s %d:%s\n", 1141 "Error adding certificate", (int)ERR_get_error(), 1142 ERR_error_string(ERR_get_error(), NULL)); 1143 X509_free(cert1); 1144 return 0; 1145 } 1146 } 1147 X509_free(cert1); 1148 } 1149 } while ((pTargetCert = CertEnumCertificatesInStore( 1150 hSystemStore, pTargetCert)) != 0); 1151 1152 /* Clean up memory and quit. */ 1153 if (pTargetCert) 1154 CertFreeCertificateContext(pTargetCert); 1155 if (hSystemStore) 1156 { 1157 if (!CertCloseStore( 1158 hSystemStore, 0)) 1159 return 0; 1160 } 1161 verbose(VERB_ALGO, "Completed adding Windows certificates to CA store successfully"); 1162 return 1; 1163 } 1164 #endif /* USE_WINSOCK */ 1165 1166 void* connect_sslctx_create(char* key, char* pem, char* verifypem, int wincert) 1167 { 1168 #ifdef HAVE_SSL 1169 SSL_CTX* ctx = SSL_CTX_new(SSLv23_client_method()); 1170 if(!ctx) { 1171 log_crypto_err("could not allocate SSL_CTX pointer"); 1172 return NULL; 1173 } 1174 #if SSL_OP_NO_SSLv2 != 0 1175 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2) 1176 != SSL_OP_NO_SSLv2) { 1177 log_crypto_err("could not set SSL_OP_NO_SSLv2"); 1178 SSL_CTX_free(ctx); 1179 return NULL; 1180 } 1181 #endif 1182 if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv3) & SSL_OP_NO_SSLv3) 1183 != SSL_OP_NO_SSLv3) { 1184 log_crypto_err("could not set SSL_OP_NO_SSLv3"); 1185 SSL_CTX_free(ctx); 1186 return NULL; 1187 } 1188 #if defined(SSL_OP_NO_RENEGOTIATION) 1189 /* disable client renegotiation */ 1190 if((SSL_CTX_set_options(ctx, SSL_OP_NO_RENEGOTIATION) & 1191 SSL_OP_NO_RENEGOTIATION) != SSL_OP_NO_RENEGOTIATION) { 1192 log_crypto_err("could not set SSL_OP_NO_RENEGOTIATION"); 1193 SSL_CTX_free(ctx); 1194 return 0; 1195 } 1196 #endif 1197 if(key && key[0]) { 1198 if(!SSL_CTX_use_certificate_chain_file(ctx, pem)) { 1199 log_err("error in client certificate %s", pem); 1200 log_crypto_err("error in certificate file"); 1201 SSL_CTX_free(ctx); 1202 return NULL; 1203 } 1204 if(!SSL_CTX_use_PrivateKey_file(ctx, key, SSL_FILETYPE_PEM)) { 1205 log_err("error in client private key %s", key); 1206 log_crypto_err("error in key file"); 1207 SSL_CTX_free(ctx); 1208 return NULL; 1209 } 1210 if(!SSL_CTX_check_private_key(ctx)) { 1211 log_err("error in client key %s", key); 1212 log_crypto_err("error in SSL_CTX_check_private_key"); 1213 SSL_CTX_free(ctx); 1214 return NULL; 1215 } 1216 } 1217 if((verifypem && verifypem[0]) || wincert) { 1218 if(verifypem && verifypem[0]) { 1219 if(!SSL_CTX_load_verify_locations(ctx, verifypem, NULL)) { 1220 log_crypto_err("error in SSL_CTX verify"); 1221 SSL_CTX_free(ctx); 1222 return NULL; 1223 } 1224 } 1225 #ifdef USE_WINSOCK 1226 if(wincert) { 1227 if(!add_WIN_cacerts_to_openssl_store(ctx)) { 1228 log_crypto_err("error in add_WIN_cacerts_to_openssl_store"); 1229 SSL_CTX_free(ctx); 1230 return NULL; 1231 } 1232 } 1233 #else 1234 (void)wincert; 1235 #endif 1236 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL); 1237 } 1238 return ctx; 1239 #else 1240 (void)key; (void)pem; (void)verifypem; (void)wincert; 1241 return NULL; 1242 #endif 1243 } 1244 1245 void* incoming_ssl_fd(void* sslctx, int fd) 1246 { 1247 #ifdef HAVE_SSL 1248 SSL* ssl = SSL_new((SSL_CTX*)sslctx); 1249 if(!ssl) { 1250 log_crypto_err("could not SSL_new"); 1251 return NULL; 1252 } 1253 SSL_set_accept_state(ssl); 1254 (void)SSL_set_mode(ssl, (long)SSL_MODE_AUTO_RETRY); 1255 if(!SSL_set_fd(ssl, fd)) { 1256 log_crypto_err("could not SSL_set_fd"); 1257 SSL_free(ssl); 1258 return NULL; 1259 } 1260 return ssl; 1261 #else 1262 (void)sslctx; (void)fd; 1263 return NULL; 1264 #endif 1265 } 1266 1267 void* outgoing_ssl_fd(void* sslctx, int fd) 1268 { 1269 #ifdef HAVE_SSL 1270 SSL* ssl = SSL_new((SSL_CTX*)sslctx); 1271 if(!ssl) { 1272 log_crypto_err("could not SSL_new"); 1273 return NULL; 1274 } 1275 SSL_set_connect_state(ssl); 1276 (void)SSL_set_mode(ssl, (long)SSL_MODE_AUTO_RETRY); 1277 if(!SSL_set_fd(ssl, fd)) { 1278 log_crypto_err("could not SSL_set_fd"); 1279 SSL_free(ssl); 1280 return NULL; 1281 } 1282 return ssl; 1283 #else 1284 (void)sslctx; (void)fd; 1285 return NULL; 1286 #endif 1287 } 1288 1289 int check_auth_name_for_ssl(char* auth_name) 1290 { 1291 if(!auth_name) return 1; 1292 #if defined(HAVE_SSL) && !defined(HAVE_SSL_SET1_HOST) && !defined(HAVE_X509_VERIFY_PARAM_SET1_HOST) 1293 log_err("the query has an auth_name %s, but libssl has no call to " 1294 "perform TLS authentication. Remove that name from config " 1295 "or upgrade the ssl crypto library.", auth_name); 1296 return 0; 1297 #else 1298 return 1; 1299 #endif 1300 } 1301 1302 /** set the authname on an SSL structure, SSL* ssl */ 1303 int set_auth_name_on_ssl(void* ssl, char* auth_name, int use_sni) 1304 { 1305 if(!auth_name) return 1; 1306 #ifdef HAVE_SSL 1307 if(use_sni) { 1308 (void)SSL_set_tlsext_host_name(ssl, auth_name); 1309 } 1310 #else 1311 (void)ssl; 1312 (void)use_sni; 1313 #endif 1314 #ifdef HAVE_SSL_SET1_HOST 1315 SSL_set_verify(ssl, SSL_VERIFY_PEER, NULL); 1316 /* setting the hostname makes openssl verify the 1317 * host name in the x509 certificate in the 1318 * SSL connection*/ 1319 if(!SSL_set1_host(ssl, auth_name)) { 1320 log_err("SSL_set1_host failed"); 1321 return 0; 1322 } 1323 #elif defined(HAVE_X509_VERIFY_PARAM_SET1_HOST) 1324 /* openssl 1.0.2 has this function that can be used for 1325 * set1_host like verification */ 1326 if(auth_name) { 1327 X509_VERIFY_PARAM* param = SSL_get0_param(ssl); 1328 # ifdef X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS 1329 X509_VERIFY_PARAM_set_hostflags(param, X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS); 1330 # endif 1331 if(!X509_VERIFY_PARAM_set1_host(param, auth_name, strlen(auth_name))) { 1332 log_err("X509_VERIFY_PARAM_set1_host failed"); 1333 return 0; 1334 } 1335 SSL_set_verify(ssl, SSL_VERIFY_PEER, NULL); 1336 } 1337 #else 1338 verbose(VERB_ALGO, "the query has an auth_name, but libssl has no call to perform TLS authentication"); 1339 #endif /* HAVE_SSL_SET1_HOST */ 1340 return 1; 1341 } 1342 1343 #if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED) && defined(CRYPTO_LOCK) && OPENSSL_VERSION_NUMBER < 0x10100000L 1344 /** global lock list for openssl locks */ 1345 static lock_basic_type *ub_openssl_locks = NULL; 1346 1347 /** callback that gets thread id for openssl */ 1348 #ifdef HAVE_CRYPTO_THREADID_SET_CALLBACK 1349 static void 1350 ub_crypto_id_cb(CRYPTO_THREADID *id) 1351 { 1352 CRYPTO_THREADID_set_numeric(id, (unsigned long)log_thread_get()); 1353 } 1354 #else 1355 static unsigned long 1356 ub_crypto_id_cb(void) 1357 { 1358 return (unsigned long)log_thread_get(); 1359 } 1360 #endif 1361 1362 static void 1363 ub_crypto_lock_cb(int mode, int type, const char *ATTR_UNUSED(file), 1364 int ATTR_UNUSED(line)) 1365 { 1366 if((mode&CRYPTO_LOCK)) { 1367 lock_basic_lock(&ub_openssl_locks[type]); 1368 } else { 1369 lock_basic_unlock(&ub_openssl_locks[type]); 1370 } 1371 } 1372 #endif /* OPENSSL_THREADS */ 1373 1374 int ub_openssl_lock_init(void) 1375 { 1376 #if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED) && defined(CRYPTO_LOCK) && OPENSSL_VERSION_NUMBER < 0x10100000L 1377 int i; 1378 ub_openssl_locks = (lock_basic_type*)reallocarray( 1379 NULL, (size_t)CRYPTO_num_locks(), sizeof(lock_basic_type)); 1380 if(!ub_openssl_locks) 1381 return 0; 1382 for(i=0; i<CRYPTO_num_locks(); i++) { 1383 lock_basic_init(&ub_openssl_locks[i]); 1384 } 1385 # ifdef HAVE_CRYPTO_THREADID_SET_CALLBACK 1386 CRYPTO_THREADID_set_callback(&ub_crypto_id_cb); 1387 # else 1388 CRYPTO_set_id_callback(&ub_crypto_id_cb); 1389 # endif 1390 CRYPTO_set_locking_callback(&ub_crypto_lock_cb); 1391 #endif /* OPENSSL_THREADS */ 1392 return 1; 1393 } 1394 1395 void ub_openssl_lock_delete(void) 1396 { 1397 #if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED) && defined(CRYPTO_LOCK) && OPENSSL_VERSION_NUMBER < 0x10100000L 1398 int i; 1399 if(!ub_openssl_locks) 1400 return; 1401 # ifdef HAVE_CRYPTO_THREADID_SET_CALLBACK 1402 CRYPTO_THREADID_set_callback(NULL); 1403 # else 1404 CRYPTO_set_id_callback(NULL); 1405 # endif 1406 CRYPTO_set_locking_callback(NULL); 1407 for(i=0; i<CRYPTO_num_locks(); i++) { 1408 lock_basic_destroy(&ub_openssl_locks[i]); 1409 } 1410 free(ub_openssl_locks); 1411 #endif /* OPENSSL_THREADS */ 1412 } 1413 1414 int listen_sslctx_setup_ticket_keys(void* sslctx, struct config_strlist* tls_session_ticket_keys) { 1415 #ifdef HAVE_SSL 1416 size_t s = 1; 1417 struct config_strlist* p; 1418 struct tls_session_ticket_key *keys; 1419 for(p = tls_session_ticket_keys; p; p = p->next) { 1420 s++; 1421 } 1422 keys = calloc(s, sizeof(struct tls_session_ticket_key)); 1423 if(!keys) 1424 return 0; 1425 memset(keys, 0, s*sizeof(*keys)); 1426 ticket_keys = keys; 1427 1428 for(p = tls_session_ticket_keys; p; p = p->next) { 1429 size_t n; 1430 unsigned char *data; 1431 FILE *f; 1432 1433 data = (unsigned char *)malloc(80); 1434 if(!data) 1435 return 0; 1436 1437 f = fopen(p->str, "rb"); 1438 if(!f) { 1439 log_err("could not read tls-session-ticket-key %s: %s", p->str, strerror(errno)); 1440 free(data); 1441 return 0; 1442 } 1443 n = fread(data, 1, 80, f); 1444 fclose(f); 1445 1446 if(n != 80) { 1447 log_err("tls-session-ticket-key %s is %d bytes, must be 80 bytes", p->str, (int)n); 1448 free(data); 1449 return 0; 1450 } 1451 verbose(VERB_OPS, "read tls-session-ticket-key: %s", p->str); 1452 1453 keys->key_name = data; 1454 keys->aes_key = data + 16; 1455 keys->hmac_key = data + 48; 1456 keys++; 1457 } 1458 /* terminate array with NULL key name entry */ 1459 keys->key_name = NULL; 1460 # ifdef HAVE_SSL_CTX_SET_TLSEXT_TICKET_KEY_EVP_CB 1461 if(SSL_CTX_set_tlsext_ticket_key_evp_cb(sslctx, tls_session_ticket_key_cb) == 0) { 1462 log_err("no support for TLS session ticket"); 1463 return 0; 1464 } 1465 # else 1466 if(SSL_CTX_set_tlsext_ticket_key_cb(sslctx, tls_session_ticket_key_cb) == 0) { 1467 log_err("no support for TLS session ticket"); 1468 return 0; 1469 } 1470 # endif 1471 return 1; 1472 #else 1473 (void)sslctx; 1474 (void)tls_session_ticket_keys; 1475 return 0; 1476 #endif 1477 1478 } 1479 1480 #ifdef HAVE_SSL 1481 int tls_session_ticket_key_cb(SSL *ATTR_UNUSED(sslctx), unsigned char* key_name, 1482 unsigned char* iv, EVP_CIPHER_CTX *evp_sctx, 1483 #ifdef HAVE_SSL_CTX_SET_TLSEXT_TICKET_KEY_EVP_CB 1484 EVP_MAC_CTX *hmac_ctx, 1485 #else 1486 HMAC_CTX* hmac_ctx, 1487 #endif 1488 int enc) 1489 { 1490 #ifdef HAVE_SSL 1491 # ifdef HAVE_SSL_CTX_SET_TLSEXT_TICKET_KEY_EVP_CB 1492 OSSL_PARAM params[3]; 1493 # else 1494 const EVP_MD *digest; 1495 # endif 1496 const EVP_CIPHER *cipher; 1497 int evp_cipher_length; 1498 # ifndef HAVE_SSL_CTX_SET_TLSEXT_TICKET_KEY_EVP_CB 1499 digest = EVP_sha256(); 1500 # endif 1501 cipher = EVP_aes_256_cbc(); 1502 evp_cipher_length = EVP_CIPHER_iv_length(cipher); 1503 if( enc == 1 ) { 1504 /* encrypt */ 1505 verbose(VERB_CLIENT, "start session encrypt"); 1506 memcpy(key_name, ticket_keys->key_name, 16); 1507 if (RAND_bytes(iv, evp_cipher_length) != 1) { 1508 verbose(VERB_CLIENT, "RAND_bytes failed"); 1509 return -1; 1510 } 1511 if (EVP_EncryptInit_ex(evp_sctx, cipher, NULL, ticket_keys->aes_key, iv) != 1) { 1512 verbose(VERB_CLIENT, "EVP_EncryptInit_ex failed"); 1513 return -1; 1514 } 1515 #ifdef HAVE_SSL_CTX_SET_TLSEXT_TICKET_KEY_EVP_CB 1516 params[0] = OSSL_PARAM_construct_octet_string(OSSL_MAC_PARAM_KEY, 1517 ticket_keys->hmac_key, 32); 1518 params[1] = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_DIGEST, 1519 "sha256", 0); 1520 params[2] = OSSL_PARAM_construct_end(); 1521 #ifdef HAVE_EVP_MAC_CTX_SET_PARAMS 1522 EVP_MAC_CTX_set_params(hmac_ctx, params); 1523 #else 1524 EVP_MAC_set_ctx_params(hmac_ctx, params); 1525 #endif 1526 #elif !defined(HMAC_INIT_EX_RETURNS_VOID) 1527 if (HMAC_Init_ex(hmac_ctx, ticket_keys->hmac_key, 32, digest, NULL) != 1) { 1528 verbose(VERB_CLIENT, "HMAC_Init_ex failed"); 1529 return -1; 1530 } 1531 #else 1532 HMAC_Init_ex(hmac_ctx, ticket_keys->hmac_key, 32, digest, NULL); 1533 #endif 1534 return 1; 1535 } else if (enc == 0) { 1536 /* decrypt */ 1537 struct tls_session_ticket_key *key; 1538 verbose(VERB_CLIENT, "start session decrypt"); 1539 for(key = ticket_keys; key->key_name != NULL; key++) { 1540 if (!memcmp(key_name, key->key_name, 16)) { 1541 verbose(VERB_CLIENT, "Found session_key"); 1542 break; 1543 } 1544 } 1545 if(key->key_name == NULL) { 1546 verbose(VERB_CLIENT, "Not found session_key"); 1547 return 0; 1548 } 1549 1550 #ifdef HAVE_SSL_CTX_SET_TLSEXT_TICKET_KEY_EVP_CB 1551 params[0] = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_KEY, 1552 key->hmac_key, 32); 1553 params[1] = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_DIGEST, 1554 "sha256", 0); 1555 params[2] = OSSL_PARAM_construct_end(); 1556 #ifdef HAVE_EVP_MAC_CTX_SET_PARAMS 1557 EVP_MAC_CTX_set_params(hmac_ctx, params); 1558 #else 1559 EVP_MAC_set_ctx_params(hmac_ctx, params); 1560 #endif 1561 #elif !defined(HMAC_INIT_EX_RETURNS_VOID) 1562 if (HMAC_Init_ex(hmac_ctx, key->hmac_key, 32, digest, NULL) != 1) { 1563 verbose(VERB_CLIENT, "HMAC_Init_ex failed"); 1564 return -1; 1565 } 1566 #else 1567 HMAC_Init_ex(hmac_ctx, key->hmac_key, 32, digest, NULL); 1568 #endif 1569 if (EVP_DecryptInit_ex(evp_sctx, cipher, NULL, key->aes_key, iv) != 1) { 1570 log_err("EVP_DecryptInit_ex failed"); 1571 return -1; 1572 } 1573 1574 return (key == ticket_keys) ? 1 : 2; 1575 } 1576 return -1; 1577 #else 1578 (void)key_name; 1579 (void)iv; 1580 (void)evp_sctx; 1581 (void)hmac_ctx; 1582 (void)enc; 1583 return 0; 1584 #endif 1585 } 1586 #endif /* HAVE_SSL */ 1587 1588 void 1589 listen_sslctx_delete_ticket_keys(void) 1590 { 1591 struct tls_session_ticket_key *key; 1592 if(!ticket_keys) return; 1593 for(key = ticket_keys; key->key_name != NULL; key++) { 1594 /* wipe key data from memory*/ 1595 #ifdef HAVE_EXPLICIT_BZERO 1596 explicit_bzero(key->key_name, 80); 1597 #else 1598 memset(key->key_name, 0xdd, 80); 1599 #endif 1600 free(key->key_name); 1601 } 1602 free(ticket_keys); 1603 ticket_keys = NULL; 1604 } 1605 1606 # ifndef USE_WINSOCK 1607 char* 1608 sock_strerror(int errn) 1609 { 1610 return strerror(errn); 1611 } 1612 1613 void 1614 sock_close(int socket) 1615 { 1616 close(socket); 1617 } 1618 1619 # else 1620 char* 1621 sock_strerror(int ATTR_UNUSED(errn)) 1622 { 1623 return wsa_strerror(WSAGetLastError()); 1624 } 1625 1626 void 1627 sock_close(int socket) 1628 { 1629 closesocket(socket); 1630 } 1631 # endif /* USE_WINSOCK */ 1632