| 1 | /* |
| 2 | ashd - A Sane HTTP Daemon |
| 3 | Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com> |
| 4 | |
| 5 | This program is free software: you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation, either version 3 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | |
| 19 | #include <stdlib.h> |
| 20 | #include <unistd.h> |
| 21 | #include <string.h> |
| 22 | #include <fcntl.h> |
| 23 | #include <dirent.h> |
| 24 | #include <sys/socket.h> |
| 25 | #include <netinet/in.h> |
| 26 | #include <arpa/inet.h> |
| 27 | #include <errno.h> |
| 28 | |
| 29 | #ifdef HAVE_CONFIG_H |
| 30 | #include <config.h> |
| 31 | #endif |
| 32 | #include <utils.h> |
| 33 | #include <mt.h> |
| 34 | #include <mtio.h> |
| 35 | #include <req.h> |
| 36 | #include <log.h> |
| 37 | #include <bufio.h> |
| 38 | |
| 39 | #include "htparser.h" |
| 40 | |
| 41 | #ifdef HAVE_GNUTLS |
| 42 | |
| 43 | #include <gnutls/gnutls.h> |
| 44 | #include <gnutls/x509.h> |
| 45 | |
| 46 | struct namedcreds { |
| 47 | char **names; |
| 48 | gnutls_certificate_credentials_t creds; |
| 49 | }; |
| 50 | |
| 51 | struct ncredbuf { |
| 52 | struct namedcreds **b; |
| 53 | size_t s, d; |
| 54 | }; |
| 55 | |
| 56 | struct sslport { |
| 57 | int fd; |
| 58 | int sport; |
| 59 | gnutls_certificate_credentials_t creds; |
| 60 | gnutls_priority_t ciphers; |
| 61 | struct namedcreds **ncreds; |
| 62 | }; |
| 63 | |
| 64 | struct sslconn { |
| 65 | int fd; |
| 66 | struct sslport *port; |
| 67 | struct sockaddr_storage name; |
| 68 | gnutls_session_t sess; |
| 69 | struct charbuf in; |
| 70 | }; |
| 71 | |
| 72 | struct savedsess { |
| 73 | struct savedsess *next, *prev; |
| 74 | gnutls_datum_t key, value; |
| 75 | }; |
| 76 | |
| 77 | struct certbuffer { |
| 78 | gnutls_x509_crt_t *b; |
| 79 | size_t s, d; |
| 80 | }; |
| 81 | |
| 82 | static int numconn = 0, numsess = 0; |
| 83 | static struct btree *sessidx = NULL; |
| 84 | static struct savedsess *sesslistf = NULL, *sesslistl = NULL; |
| 85 | |
| 86 | static int sesscmp(void *ap, void *bp) |
| 87 | { |
| 88 | struct savedsess *a = ap, *b = bp; |
| 89 | |
| 90 | if(a->key.size != b->key.size) |
| 91 | return(a->key.size - b->key.size); |
| 92 | return(memcmp(a->key.data, b->key.data, a->key.size)); |
| 93 | } |
| 94 | |
| 95 | static gnutls_datum_t sessdbfetch(void *uudata, gnutls_datum_t key) |
| 96 | { |
| 97 | struct savedsess *sess, lkey; |
| 98 | gnutls_datum_t ret; |
| 99 | |
| 100 | memset(&ret, 0, sizeof(ret)); |
| 101 | lkey.key = key; |
| 102 | if((sess = btreeget(sessidx, &lkey, sesscmp)) == NULL) |
| 103 | return(ret); |
| 104 | ret.data = memcpy(gnutls_malloc(ret.size = sess->value.size), sess->value.data, sess->value.size); |
| 105 | return(ret); |
| 106 | } |
| 107 | |
| 108 | static void freesess(struct savedsess *sess) |
| 109 | { |
| 110 | bbtreedel(&sessidx, sess, sesscmp); |
| 111 | if(sess->next) |
| 112 | sess->next->prev = sess->prev; |
| 113 | if(sess->prev) |
| 114 | sess->prev->next = sess->next; |
| 115 | if(sess == sesslistf) |
| 116 | sesslistf = sess->next; |
| 117 | if(sess == sesslistl) |
| 118 | sesslistl = sess->prev; |
| 119 | free(sess->key.data); |
| 120 | free(sess->value.data); |
| 121 | free(sess); |
| 122 | numsess--; |
| 123 | } |
| 124 | |
| 125 | static int sessdbdel(void *uudata, gnutls_datum_t key) |
| 126 | { |
| 127 | struct savedsess *sess, lkey; |
| 128 | |
| 129 | lkey.key = key; |
| 130 | if((sess = btreeget(sessidx, &lkey, sesscmp)) == NULL) |
| 131 | return(-1); |
| 132 | freesess(sess); |
| 133 | return(0); |
| 134 | } |
| 135 | |
| 136 | static void cleansess(void) |
| 137 | { |
| 138 | while(numsess > (max(numconn, 1) * 100)) |
| 139 | freesess(sesslistl); |
| 140 | } |
| 141 | |
| 142 | static int sessdbstore(void *uudata, gnutls_datum_t key, gnutls_datum_t value) |
| 143 | { |
| 144 | static int cc = 0; |
| 145 | struct savedsess *sess, lkey; |
| 146 | |
| 147 | if((value.data == NULL) || (value.size == 0)) { |
| 148 | sessdbdel(NULL, key); |
| 149 | return(0); |
| 150 | } |
| 151 | lkey.key = key; |
| 152 | if((sess = btreeget(sessidx, &lkey, sesscmp)) == NULL) { |
| 153 | omalloc(sess); |
| 154 | sess->key.data = memcpy(smalloc(sess->key.size = key.size), key.data, key.size); |
| 155 | sess->value.data = memcpy(smalloc(sess->value.size = value.size), value.data, value.size); |
| 156 | bbtreeput(&sessidx, sess, sesscmp); |
| 157 | sess->prev = NULL; |
| 158 | sess->next = sesslistf; |
| 159 | if(sesslistf) |
| 160 | sesslistf->prev = sess; |
| 161 | sesslistf = sess; |
| 162 | if(sesslistl == NULL) |
| 163 | sesslistl = sess; |
| 164 | numsess++; |
| 165 | } else { |
| 166 | free(sess->value.data); |
| 167 | sess->value.data = memcpy(smalloc(sess->value.size = value.size), value.data, value.size); |
| 168 | if(sess != sesslistf) { |
| 169 | if(sess->next) |
| 170 | sess->next->prev = sess->prev; |
| 171 | if(sess->prev) |
| 172 | sess->prev->next = sess->next; |
| 173 | if(sess == sesslistl) |
| 174 | sesslistl = sess->prev; |
| 175 | sess->prev = NULL; |
| 176 | sess->next = sesslistf; |
| 177 | if(sesslistf) |
| 178 | sesslistf->prev = sess; |
| 179 | sesslistf = sess; |
| 180 | } |
| 181 | } |
| 182 | if(cc++ > 100) { |
| 183 | cleansess(); |
| 184 | cc = 0; |
| 185 | } |
| 186 | return(0); |
| 187 | } |
| 188 | |
| 189 | static int tlsblock(int fd, gnutls_session_t sess, time_t to) |
| 190 | { |
| 191 | if(gnutls_record_get_direction(sess)) |
| 192 | return(block(fd, EV_WRITE, to)); |
| 193 | else |
| 194 | return(block(fd, EV_READ, to)); |
| 195 | } |
| 196 | |
| 197 | static ssize_t sslread(void *cookie, void *buf, size_t len) |
| 198 | { |
| 199 | struct sslconn *ssl = cookie; |
| 200 | ssize_t xf; |
| 201 | int ret; |
| 202 | |
| 203 | while(ssl->in.d == 0) { |
| 204 | sizebuf(ssl->in, ssl->in.d + 1024); |
| 205 | ret = gnutls_record_recv(ssl->sess, ssl->in.b + ssl->in.d, ssl->in.s - ssl->in.d); |
| 206 | if((ret == GNUTLS_E_INTERRUPTED) || (ret == GNUTLS_E_AGAIN)) { |
| 207 | if(tlsblock(ssl->fd, ssl->sess, 60) == 0) { |
| 208 | errno = ETIMEDOUT; |
| 209 | return(-1); |
| 210 | } |
| 211 | } else if(ret < 0) { |
| 212 | errno = EIO; |
| 213 | return(-1); |
| 214 | } else if(ret == 0) { |
| 215 | return(0); |
| 216 | } else { |
| 217 | ssl->in.d += ret; |
| 218 | } |
| 219 | } |
| 220 | xf = min(ssl->in.d, len); |
| 221 | memcpy(buf, ssl->in.b, xf); |
| 222 | memmove(ssl->in.b, ssl->in.b + xf, ssl->in.d -= xf); |
| 223 | return(xf); |
| 224 | } |
| 225 | |
| 226 | static ssize_t sslwrite(void *cookie, const void *buf, size_t len) |
| 227 | { |
| 228 | struct sslconn *ssl = cookie; |
| 229 | int ret; |
| 230 | size_t off; |
| 231 | |
| 232 | off = 0; |
| 233 | while(off < len) { |
| 234 | ret = gnutls_record_send(ssl->sess, buf + off, len - off); |
| 235 | if((ret == GNUTLS_E_INTERRUPTED) || (ret == GNUTLS_E_AGAIN)) { |
| 236 | if(tlsblock(ssl->fd, ssl->sess, 60) == 0) { |
| 237 | if(off == 0) { |
| 238 | errno = ETIMEDOUT; |
| 239 | return(-1); |
| 240 | } |
| 241 | return(off); |
| 242 | } |
| 243 | } else if(ret < 0) { |
| 244 | if(off == 0) { |
| 245 | errno = EIO; |
| 246 | return(-1); |
| 247 | } |
| 248 | return(off); |
| 249 | } else { |
| 250 | off += ret; |
| 251 | } |
| 252 | } |
| 253 | return(off); |
| 254 | } |
| 255 | |
| 256 | static int sslclose(void *cookie) |
| 257 | { |
| 258 | struct sslconn *ssl = cookie; |
| 259 | |
| 260 | buffree(ssl->in); |
| 261 | return(0); |
| 262 | } |
| 263 | |
| 264 | static struct bufioops iofuns = { |
| 265 | .read = sslread, |
| 266 | .write = sslwrite, |
| 267 | .close = sslclose, |
| 268 | }; |
| 269 | |
| 270 | static int initreq(struct conn *conn, struct hthead *req) |
| 271 | { |
| 272 | struct sslconn *ssl = conn->pdata; |
| 273 | struct sockaddr_storage sa; |
| 274 | socklen_t salen; |
| 275 | |
| 276 | headappheader(req, "X-Ash-Address", formathaddress((struct sockaddr *)&ssl->name, sizeof(sa))); |
| 277 | if(ssl->name.ss_family == AF_INET) |
| 278 | headappheader(req, "X-Ash-Port", sprintf3("%i", ntohs(((struct sockaddr_in *)&ssl->name)->sin_port))); |
| 279 | else if(ssl->name.ss_family == AF_INET6) |
| 280 | headappheader(req, "X-Ash-Port", sprintf3("%i", ntohs(((struct sockaddr_in6 *)&ssl->name)->sin6_port))); |
| 281 | salen = sizeof(sa); |
| 282 | if(!getsockname(ssl->fd, (struct sockaddr *)&sa, &salen)) |
| 283 | headappheader(req, "X-Ash-Server-Address", formathaddress((struct sockaddr *)&sa, sizeof(sa))); |
| 284 | headappheader(req, "X-Ash-Server-Port", sprintf3("%i", ssl->port->sport)); |
| 285 | headappheader(req, "X-Ash-Protocol", "https"); |
| 286 | return(0); |
| 287 | } |
| 288 | |
| 289 | static void servessl(struct muth *muth, va_list args) |
| 290 | { |
| 291 | vavar(int, fd); |
| 292 | vavar(struct sockaddr_storage, name); |
| 293 | vavar(struct sslport *, pd); |
| 294 | struct conn conn; |
| 295 | struct sslconn ssl; |
| 296 | gnutls_session_t sess; |
| 297 | int ret; |
| 298 | |
| 299 | int setcreds(gnutls_session_t sess) |
| 300 | { |
| 301 | int i, o, u; |
| 302 | unsigned int ntype; |
| 303 | char nambuf[256]; |
| 304 | size_t namlen; |
| 305 | |
| 306 | for(i = 0; 1; i++) { |
| 307 | namlen = sizeof(nambuf); |
| 308 | if(gnutls_server_name_get(sess, nambuf, &namlen, &ntype, i) != 0) |
| 309 | break; |
| 310 | if(ntype != GNUTLS_NAME_DNS) |
| 311 | continue; |
| 312 | for(o = 0; pd->ncreds[o] != NULL; o++) { |
| 313 | for(u = 0; pd->ncreds[o]->names[u] != NULL; u++) { |
| 314 | if(!strcmp(pd->ncreds[o]->names[u], nambuf)) { |
| 315 | gnutls_credentials_set(sess, GNUTLS_CRD_CERTIFICATE, pd->ncreds[o]->creds); |
| 316 | gnutls_certificate_server_set_request(sess, GNUTLS_CERT_REQUEST); |
| 317 | return(0); |
| 318 | } |
| 319 | } |
| 320 | } |
| 321 | } |
| 322 | gnutls_credentials_set(sess, GNUTLS_CRD_CERTIFICATE, pd->creds); |
| 323 | gnutls_certificate_server_set_request(sess, GNUTLS_CERT_REQUEST); |
| 324 | return(0); |
| 325 | } |
| 326 | |
| 327 | numconn++; |
| 328 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
| 329 | gnutls_init(&sess, GNUTLS_SERVER); |
| 330 | gnutls_priority_set(sess, pd->ciphers); |
| 331 | gnutls_db_set_retrieve_function(sess, sessdbfetch); |
| 332 | gnutls_db_set_store_function(sess, sessdbstore); |
| 333 | gnutls_db_set_remove_function(sess, sessdbdel); |
| 334 | gnutls_db_set_ptr(sess, NULL); |
| 335 | gnutls_handshake_set_post_client_hello_function(sess, setcreds); |
| 336 | gnutls_transport_set_ptr(sess, (gnutls_transport_ptr_t)(intptr_t)fd); |
| 337 | while((ret = gnutls_handshake(sess)) != 0) { |
| 338 | if((ret != GNUTLS_E_INTERRUPTED) && (ret != GNUTLS_E_AGAIN)) |
| 339 | goto out; |
| 340 | if(tlsblock(fd, sess, 60) <= 0) |
| 341 | goto out; |
| 342 | } |
| 343 | memset(&conn, 0, sizeof(conn)); |
| 344 | memset(&ssl, 0, sizeof(ssl)); |
| 345 | conn.pdata = &ssl; |
| 346 | conn.initreq = initreq; |
| 347 | ssl.fd = fd; |
| 348 | ssl.port = pd; |
| 349 | ssl.name = name; |
| 350 | ssl.sess = sess; |
| 351 | bufinit(ssl.in); |
| 352 | serve(bioopen(&ssl, &iofuns), fd, &conn); |
| 353 | |
| 354 | out: |
| 355 | gnutls_deinit(sess); |
| 356 | close(fd); |
| 357 | numconn--; |
| 358 | } |
| 359 | |
| 360 | static void listenloop(struct muth *muth, va_list args) |
| 361 | { |
| 362 | vavar(struct sslport *, pd); |
| 363 | int i, ns, n; |
| 364 | struct sockaddr_storage name; |
| 365 | socklen_t namelen; |
| 366 | |
| 367 | fcntl(pd->fd, F_SETFL, fcntl(pd->fd, F_GETFL) | O_NONBLOCK); |
| 368 | while(1) { |
| 369 | namelen = sizeof(name); |
| 370 | if(block(pd->fd, EV_READ, 0) == 0) |
| 371 | goto out; |
| 372 | n = 0; |
| 373 | while(1) { |
| 374 | ns = accept(pd->fd, (struct sockaddr *)&name, &namelen); |
| 375 | if(ns < 0) { |
| 376 | if(errno == EAGAIN) |
| 377 | break; |
| 378 | if(errno == ECONNABORTED) |
| 379 | continue; |
| 380 | flog(LOG_ERR, "accept: %s", strerror(errno)); |
| 381 | goto out; |
| 382 | } |
| 383 | mustart(servessl, ns, name, pd); |
| 384 | if(++n >= 100) |
| 385 | break; |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | out: |
| 390 | close(pd->fd); |
| 391 | free(pd); |
| 392 | for(i = 0; i < listeners.d; i++) { |
| 393 | if(listeners.b[i] == muth) |
| 394 | bufdel(listeners, i); |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | static gnutls_dh_params_t dhparams(void) |
| 399 | { |
| 400 | static int inited = 0; |
| 401 | static gnutls_dh_params_t pars; |
| 402 | int ret; |
| 403 | |
| 404 | if(!inited) { |
| 405 | if(((ret = gnutls_dh_params_init(&pars)) != 0) || |
| 406 | ((ret = gnutls_dh_params_generate2(pars, 2048)) != 0)) { |
| 407 | flog(LOG_ERR, "GnuTLS could not generate Diffie-Hellman parameters: %s", gnutls_strerror(ret)); |
| 408 | exit(1); |
| 409 | } |
| 410 | inited = 1; |
| 411 | } |
| 412 | return(pars); |
| 413 | } |
| 414 | |
| 415 | static void init(void) |
| 416 | { |
| 417 | static int inited = 0; |
| 418 | int ret; |
| 419 | |
| 420 | if(inited) |
| 421 | return; |
| 422 | inited = 1; |
| 423 | if((ret = gnutls_global_init()) != 0) { |
| 424 | flog(LOG_ERR, "could not initialize GnuTLS: %s", gnutls_strerror(ret)); |
| 425 | exit(1); |
| 426 | } |
| 427 | } |
| 428 | |
| 429 | /* This implementation seems somewhat ugly, but it's the way the |
| 430 | * GnuTLS implements the same thing internally, so it should probably |
| 431 | * be interoperable, at least. */ |
| 432 | static int readcrtchain(struct certbuffer *ret, struct charbuf *pem) |
| 433 | { |
| 434 | static char *headers[] = {"-----BEGIN CERTIFICATE", "-----BEGIN X509 CERTIFICATE"}; |
| 435 | int i, rv; |
| 436 | char *p, *p2, *f; |
| 437 | gnutls_x509_crt_t crt; |
| 438 | |
| 439 | for(i = 0, p = NULL; i < sizeof(headers) / sizeof(*headers); i++) { |
| 440 | f = memmem(pem->b, pem->d, headers[i], strlen(headers[i])); |
| 441 | if((f != NULL) && ((p == NULL) || (f < p))) |
| 442 | p = f; |
| 443 | } |
| 444 | if(p == NULL) |
| 445 | return(-GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE); |
| 446 | do { |
| 447 | if((rv = gnutls_x509_crt_init(&crt)) < 0) |
| 448 | goto error; |
| 449 | if((rv = gnutls_x509_crt_import(crt, &(gnutls_datum_t){.data = (unsigned char *)p, .size = pem->d - (p - pem->b)}, GNUTLS_X509_FMT_PEM)) < 0) { |
| 450 | gnutls_x509_crt_deinit(crt); |
| 451 | goto error; |
| 452 | } |
| 453 | bufadd(*ret, crt); |
| 454 | for(i = 0, p2 = NULL; i < sizeof(headers) / sizeof(*headers); i++) { |
| 455 | f = memmem(p + 1, pem->d - (p + 1 - pem->b), headers[i], strlen(headers[i])); |
| 456 | if((f != NULL) && ((p2 == NULL) || (f < p2))) |
| 457 | p2 = f; |
| 458 | } |
| 459 | } while((p = p2) != NULL); |
| 460 | return(0); |
| 461 | error: |
| 462 | for(i = 0; i < ret->d; i++) |
| 463 | gnutls_x509_crt_deinit(ret->b[i]); |
| 464 | ret->d = 0; |
| 465 | return(rv); |
| 466 | } |
| 467 | |
| 468 | static struct namedcreds *readncreds(char *file, gnutls_x509_privkey_t defkey) |
| 469 | { |
| 470 | int i, fd, ret; |
| 471 | struct namedcreds *nc; |
| 472 | struct certbuffer crts; |
| 473 | gnutls_x509_privkey_t key; |
| 474 | char cn[1024]; |
| 475 | size_t cnl; |
| 476 | struct charbuf keybuf; |
| 477 | struct charvbuf names; |
| 478 | unsigned int type; |
| 479 | |
| 480 | bufinit(keybuf); |
| 481 | bufinit(crts); |
| 482 | bufinit(names); |
| 483 | if((fd = open(file, O_RDONLY)) < 0) { |
| 484 | flog(LOG_ERR, "ssl: %s: %s", file, strerror(errno)); |
| 485 | exit(1); |
| 486 | } |
| 487 | while(1) { |
| 488 | sizebuf(keybuf, keybuf.d + 1024); |
| 489 | ret = read(fd, keybuf.b + keybuf.d, keybuf.s - keybuf.d); |
| 490 | if(ret < 0) { |
| 491 | flog(LOG_ERR, "ssl: reading from %s: %s", file, strerror(errno)); |
| 492 | exit(1); |
| 493 | } else if(ret == 0) { |
| 494 | break; |
| 495 | } |
| 496 | keybuf.d += ret; |
| 497 | } |
| 498 | close(fd); |
| 499 | if((ret = readcrtchain(&crts, &keybuf)) != 0) { |
| 500 | flog(LOG_ERR, "ssl: could not load certificate chain from %s: %s", file, gnutls_strerror(ret)); |
| 501 | exit(1); |
| 502 | } |
| 503 | cnl = sizeof(cn) - 1; |
| 504 | if((ret = gnutls_x509_crt_get_dn_by_oid(crts.b[0], GNUTLS_OID_X520_COMMON_NAME, 0, 0, cn, &cnl)) != 0) { |
| 505 | flog(LOG_ERR, "ssl: could not read common name from %s: %s", file, gnutls_strerror(ret)); |
| 506 | exit(1); |
| 507 | } |
| 508 | cn[cnl] = 0; |
| 509 | bufadd(names, sstrdup(cn)); |
| 510 | for(i = 0; 1; i++) { |
| 511 | cnl = sizeof(cn) - 1; |
| 512 | if(gnutls_x509_crt_get_subject_alt_name2(crts.b[0], i, cn, &cnl, &type, NULL) < 0) |
| 513 | break; |
| 514 | cn[cnl] = 0; |
| 515 | if(type == GNUTLS_SAN_DNSNAME) |
| 516 | bufadd(names, sstrdup(cn)); |
| 517 | } |
| 518 | gnutls_x509_privkey_init(&key); |
| 519 | if((ret = gnutls_x509_privkey_import(key, &(gnutls_datum_t){.data = (unsigned char *)keybuf.b, .size = keybuf.d}, GNUTLS_X509_FMT_PEM)) != 0) { |
| 520 | if(ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) { |
| 521 | gnutls_x509_privkey_deinit(key); |
| 522 | key = defkey; |
| 523 | } else { |
| 524 | flog(LOG_ERR, "ssl: could not load key from %s: %s", file, gnutls_strerror(ret)); |
| 525 | exit(1); |
| 526 | } |
| 527 | } |
| 528 | buffree(keybuf); |
| 529 | bufadd(names, NULL); |
| 530 | omalloc(nc); |
| 531 | nc->names = names.b; |
| 532 | gnutls_certificate_allocate_credentials(&nc->creds); |
| 533 | if((ret = gnutls_certificate_set_x509_key(nc->creds, crts.b, crts.d, key)) != 0) { |
| 534 | flog(LOG_ERR, "ssl: could not use certificate from %s: %s", file, gnutls_strerror(ret)); |
| 535 | exit(1); |
| 536 | } |
| 537 | gnutls_certificate_set_dh_params(nc->creds, dhparams()); |
| 538 | return(nc); |
| 539 | } |
| 540 | |
| 541 | static void readncdir(struct ncredbuf *buf, char *dir, gnutls_x509_privkey_t defkey) |
| 542 | { |
| 543 | DIR *d; |
| 544 | struct dirent *e; |
| 545 | size_t es; |
| 546 | |
| 547 | if((d = opendir(dir)) == NULL) { |
| 548 | flog(LOG_ERR, "ssl: could not read certificate directory %s: %s", dir, strerror(errno)); |
| 549 | exit(1); |
| 550 | } |
| 551 | while((e = readdir(d)) != NULL) { |
| 552 | if(e->d_name[0] == '.') |
| 553 | continue; |
| 554 | if((es = strlen(e->d_name)) <= 4) |
| 555 | continue; |
| 556 | if(strcmp(e->d_name + es - 4, ".crt")) |
| 557 | continue; |
| 558 | bufadd(*buf, readncreds(sprintf3("%s/%s", dir, e->d_name), defkey)); |
| 559 | } |
| 560 | closedir(d); |
| 561 | } |
| 562 | |
| 563 | void handlegnussl(int argc, char **argp, char **argv) |
| 564 | { |
| 565 | int i, ret, port, fd; |
| 566 | gnutls_certificate_credentials_t creds; |
| 567 | gnutls_priority_t ciphers; |
| 568 | gnutls_x509_privkey_t defkey; |
| 569 | struct ncredbuf ncreds; |
| 570 | struct charvbuf ncertf, ncertd; |
| 571 | struct sslport *pd; |
| 572 | char *crtfile, *keyfile, *perr; |
| 573 | |
| 574 | init(); |
| 575 | port = 443; |
| 576 | bufinit(ncreds); |
| 577 | bufinit(ncertf); |
| 578 | bufinit(ncertd); |
| 579 | gnutls_certificate_allocate_credentials(&creds); |
| 580 | keyfile = crtfile = NULL; |
| 581 | ciphers = NULL; |
| 582 | for(i = 0; i < argc; i++) { |
| 583 | if(!strcmp(argp[i], "help")) { |
| 584 | printf("ssl handler parameters:\n"); |
| 585 | printf("\tcert=CERT-FILE [mandatory]\n"); |
| 586 | printf("\t\tThe name of the file to read the certificate from.\n"); |
| 587 | printf("\tkey=KEY-FILE [same as CERT-FILE]\n"); |
| 588 | printf("\t\tThe name of the file to read the private key from.\n"); |
| 589 | printf("\tprio=PRIORITIES [NORMAL]\n"); |
| 590 | printf("\t\tCiphersuite priorities, as a GnuTLS priority string.\n"); |
| 591 | printf("\ttrust=CA-FILE [no default]\n"); |
| 592 | printf("\t\tThe name of a file to read trusted certificates from.\n"); |
| 593 | printf("\t\tMay be given multiple times.\n"); |
| 594 | printf("\tcrl=CRL-FILE [no default]\n"); |
| 595 | printf("\t\tThe name of a file to read revocation lists from.\n"); |
| 596 | printf("\t\tMay be given multiple times.\n"); |
| 597 | printf("\tncert=CERT-FILE [no default]\n"); |
| 598 | printf("\t\tThe name of a file to read a named certificate from,\n"); |
| 599 | printf("\t\tfor use with SNI-enabled clients.\n"); |
| 600 | printf("\t\tMay be given multiple times.\n"); |
| 601 | printf("\tncertdir=DIR [no default]\n"); |
| 602 | printf("\t\tRead all *.crt files in the given directory as if they\n"); |
| 603 | printf("\t\twere given with `ncert' options.\n"); |
| 604 | printf("\t\tMay be given multiple times.\n"); |
| 605 | printf("\tport=PORT [443]\n"); |
| 606 | printf("\t\tThe TCP port to listen on.\n"); |
| 607 | printf("\n"); |
| 608 | printf("\tAll X.509 data files must be PEM-encoded.\n"); |
| 609 | printf("\tIf any certificates were given with `ncert' options, they will be\n"); |
| 610 | printf("\tused if a client explicitly names one of them with a\n"); |
| 611 | printf("\tserver-name indication. If a client indicates no server name,\n"); |
| 612 | printf("\tor if a server-name indication does not match any given\n"); |
| 613 | printf("\tcertificate, the certificate given with the `cert' option will\n"); |
| 614 | printf("\tbe used instead.\n"); |
| 615 | exit(0); |
| 616 | } else if(!strcmp(argp[i], "cert")) { |
| 617 | crtfile = argv[i]; |
| 618 | } else if(!strcmp(argp[i], "key")) { |
| 619 | keyfile = argv[i]; |
| 620 | } else if(!strcmp(argp[i], "prio")) { |
| 621 | if(ciphers != NULL) |
| 622 | gnutls_priority_deinit(ciphers); |
| 623 | ret = gnutls_priority_init(&ciphers, argv[i], (const char **)&perr); |
| 624 | if(ret == GNUTLS_E_INVALID_REQUEST) { |
| 625 | flog(LOG_ERR, "ssl: invalid cipher priority string, at `%s'", perr); |
| 626 | exit(1); |
| 627 | } else if(ret != 0) { |
| 628 | flog(LOG_ERR, "ssl: could not initialize cipher priorities: %s", gnutls_strerror(ret)); |
| 629 | exit(1); |
| 630 | } |
| 631 | } else if(!strcmp(argp[i], "trust")) { |
| 632 | if((ret = gnutls_certificate_set_x509_trust_file(creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) { |
| 633 | flog(LOG_ERR, "ssl: could not load trust file `%s': %s", argv[i], gnutls_strerror(ret)); |
| 634 | exit(1); |
| 635 | } |
| 636 | for(i = 0; i < ncreds.d; i++) { |
| 637 | if((ret = gnutls_certificate_set_x509_trust_file(ncreds.b[i]->creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) { |
| 638 | flog(LOG_ERR, "ssl: could not load trust file `%s': %s", argv[i], gnutls_strerror(ret)); |
| 639 | exit(1); |
| 640 | } |
| 641 | } |
| 642 | } else if(!strcmp(argp[i], "crl")) { |
| 643 | if((ret = gnutls_certificate_set_x509_crl_file(creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) { |
| 644 | flog(LOG_ERR, "ssl: could not load CRL file `%s': %s", argv[i], gnutls_strerror(ret)); |
| 645 | exit(1); |
| 646 | } |
| 647 | for(i = 0; i < ncreds.d; i++) { |
| 648 | if((ret = gnutls_certificate_set_x509_crl_file(ncreds.b[i]->creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) { |
| 649 | flog(LOG_ERR, "ssl: could not load CRL file `%s': %s", argv[i], gnutls_strerror(ret)); |
| 650 | exit(1); |
| 651 | } |
| 652 | } |
| 653 | } else if(!strcmp(argp[i], "port")) { |
| 654 | port = atoi(argv[i]); |
| 655 | } else if(!strcmp(argp[i], "ncert")) { |
| 656 | bufadd(ncertf, argv[i]); |
| 657 | } else if(!strcmp(argp[i], "ncertdir")) { |
| 658 | bufadd(ncertd, argv[i]); |
| 659 | } else { |
| 660 | flog(LOG_ERR, "unknown parameter `%s' to ssl handler", argp[i]); |
| 661 | exit(1); |
| 662 | } |
| 663 | } |
| 664 | if(crtfile == NULL) { |
| 665 | flog(LOG_ERR, "ssl: needs certificate file at the very least"); |
| 666 | exit(1); |
| 667 | } |
| 668 | if((fd = listensock6(port)) < 0) { |
| 669 | flog(LOG_ERR, "could not listen on IPv6 port (port %i): %s", port, strerror(errno)); |
| 670 | exit(1); |
| 671 | } |
| 672 | if(keyfile == NULL) |
| 673 | keyfile = crtfile; |
| 674 | if((ret = gnutls_certificate_set_x509_key_file(creds, crtfile, keyfile, GNUTLS_X509_FMT_PEM)) != 0) { |
| 675 | flog(LOG_ERR, "ssl: could not load certificate or key: %s", gnutls_strerror(ret)); |
| 676 | exit(1); |
| 677 | } |
| 678 | if((ciphers == NULL) && ((ret = gnutls_priority_init(&ciphers, "NORMAL", NULL)) != 0)) { |
| 679 | flog(LOG_ERR, "ssl: could not initialize cipher priorities: %s", gnutls_strerror(ret)); |
| 680 | exit(1); |
| 681 | } |
| 682 | if((ret = gnutls_certificate_get_x509_key(creds, 0, &defkey)) != 0) { |
| 683 | flog(LOG_ERR, "ssl: could not get default key: %s", gnutls_strerror(ret)); |
| 684 | exit(1); |
| 685 | } |
| 686 | for(i = 0; i < ncertf.d; i++) |
| 687 | bufadd(ncreds, readncreds(ncertf.b[i], defkey)); |
| 688 | for(i = 0; i < ncertd.d; i++) |
| 689 | readncdir(&ncreds, ncertd.b[i], defkey); |
| 690 | buffree(ncertf); |
| 691 | buffree(ncertd); |
| 692 | gnutls_certificate_set_dh_params(creds, dhparams()); |
| 693 | bufadd(ncreds, NULL); |
| 694 | omalloc(pd); |
| 695 | pd->fd = fd; |
| 696 | pd->sport = port; |
| 697 | pd->creds = creds; |
| 698 | pd->ncreds = ncreds.b; |
| 699 | pd->ciphers = ciphers; |
| 700 | bufadd(listeners, mustart(listenloop, pd)); |
| 701 | if((fd = listensock4(port)) < 0) { |
| 702 | if(errno != EADDRINUSE) { |
| 703 | flog(LOG_ERR, "could not listen on IPv4 port (port %i): %s", port, strerror(errno)); |
| 704 | exit(1); |
| 705 | } |
| 706 | } else { |
| 707 | omalloc(pd); |
| 708 | pd->fd = fd; |
| 709 | pd->sport = port; |
| 710 | pd->creds = creds; |
| 711 | pd->ncreds = ncreds.b; |
| 712 | pd->ciphers = ciphers; |
| 713 | bufadd(listeners, mustart(listenloop, pd)); |
| 714 | } |
| 715 | } |
| 716 | |
| 717 | #endif |