2 ashd - A Sane HTTP Daemon
3 Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com>
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.
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.
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/>.
24 #include <sys/socket.h>
25 #include <netinet/in.h>
26 #include <arpa/inet.h>
43 #include <gnutls/gnutls.h>
44 #include <gnutls/x509.h>
48 gnutls_certificate_credentials_t creds;
52 struct namedcreds **b;
59 gnutls_certificate_credentials_t creds;
60 gnutls_priority_t ciphers;
61 struct namedcreds **ncreds;
67 struct sockaddr_storage name;
68 gnutls_session_t sess;
73 struct savedsess *next, *prev;
74 gnutls_datum_t key, value;
77 static int numconn = 0, numsess = 0;
78 static struct btree *sessidx = NULL;
79 static struct savedsess *sesslistf = NULL, *sesslistl = NULL;
81 static int sesscmp(void *ap, void *bp)
83 struct savedsess *a = ap, *b = bp;
85 if(a->key.size != b->key.size)
86 return(a->key.size - b->key.size);
87 return(memcmp(a->key.data, b->key.data, a->key.size));
90 static gnutls_datum_t sessdbfetch(void *uudata, gnutls_datum_t key)
92 struct savedsess *sess, lkey;
95 memset(&ret, 0, sizeof(ret));
97 if((sess = btreeget(sessidx, &lkey, sesscmp)) == NULL)
99 ret.data = memcpy(gnutls_malloc(ret.size = sess->value.size), sess->value.data, sess->value.size);
103 static void freesess(struct savedsess *sess)
105 bbtreedel(&sessidx, sess, sesscmp);
107 sess->next->prev = sess->prev;
109 sess->prev->next = sess->next;
110 if(sess == sesslistf)
111 sesslistf = sess->next;
112 if(sess == sesslistl)
113 sesslistl = sess->prev;
114 free(sess->key.data);
115 free(sess->value.data);
120 static int sessdbdel(void *uudata, gnutls_datum_t key)
122 struct savedsess *sess, lkey;
125 if((sess = btreeget(sessidx, &lkey, sesscmp)) == NULL)
131 static void cleansess(void)
133 while(numsess > (max(numconn, 1) * 100))
137 static int sessdbstore(void *uudata, gnutls_datum_t key, gnutls_datum_t value)
140 struct savedsess *sess, lkey;
142 if((value.data == NULL) || (value.size == 0)) {
143 sessdbdel(NULL, key);
147 if((sess = btreeget(sessidx, &lkey, sesscmp)) == NULL) {
149 sess->key.data = memcpy(smalloc(sess->key.size = key.size), key.data, key.size);
150 sess->value.data = memcpy(smalloc(sess->value.size = value.size), value.data, value.size);
151 bbtreeput(&sessidx, sess, sesscmp);
153 sess->next = sesslistf;
155 sesslistf->prev = sess;
157 if(sesslistl == NULL)
161 free(sess->value.data);
162 sess->value.data = memcpy(smalloc(sess->value.size = value.size), value.data, value.size);
163 if(sess != sesslistf) {
165 sess->next->prev = sess->prev;
167 sess->prev->next = sess->next;
168 if(sess == sesslistl)
169 sesslistl = sess->prev;
171 sess->next = sesslistf;
173 sesslistf->prev = sess;
184 static int tlsblock(int fd, gnutls_session_t sess, time_t to)
186 if(gnutls_record_get_direction(sess))
187 return(block(fd, EV_WRITE, to));
189 return(block(fd, EV_READ, to));
192 static ssize_t sslread(void *cookie, void *buf, size_t len)
194 struct sslconn *ssl = cookie;
198 while(ssl->in.d == 0) {
199 sizebuf(ssl->in, ssl->in.d + 1024);
200 ret = gnutls_record_recv(ssl->sess, ssl->in.b + ssl->in.d, ssl->in.s - ssl->in.d);
201 if((ret == GNUTLS_E_INTERRUPTED) || (ret == GNUTLS_E_AGAIN)) {
202 if(tlsblock(ssl->fd, ssl->sess, 60) == 0) {
209 } else if(ret == 0) {
215 xf = min(ssl->in.d, len);
216 memcpy(buf, ssl->in.b, xf);
217 memmove(ssl->in.b, ssl->in.b + xf, ssl->in.d -= xf);
221 static ssize_t sslwrite(void *cookie, const void *buf, size_t len)
223 struct sslconn *ssl = cookie;
229 ret = gnutls_record_send(ssl->sess, buf + off, len - off);
230 if((ret == GNUTLS_E_INTERRUPTED) || (ret == GNUTLS_E_AGAIN)) {
231 if(tlsblock(ssl->fd, ssl->sess, 60) == 0) {
251 static int sslclose(void *cookie)
253 struct sslconn *ssl = cookie;
259 static struct bufioops iofuns = {
265 static int initreq(struct conn *conn, struct hthead *req)
267 struct sslconn *ssl = conn->pdata;
268 struct sockaddr_storage sa;
271 headappheader(req, "X-Ash-Address", formathaddress((struct sockaddr *)&ssl->name, sizeof(sa)));
272 if(ssl->name.ss_family == AF_INET)
273 headappheader(req, "X-Ash-Port", sprintf3("%i", ntohs(((struct sockaddr_in *)&ssl->name)->sin_port)));
274 else if(ssl->name.ss_family == AF_INET6)
275 headappheader(req, "X-Ash-Port", sprintf3("%i", ntohs(((struct sockaddr_in6 *)&ssl->name)->sin6_port)));
277 if(!getsockname(ssl->fd, (struct sockaddr *)&sa, &salen))
278 headappheader(req, "X-Ash-Server-Address", formathaddress((struct sockaddr *)&sa, sizeof(sa)));
279 headappheader(req, "X-Ash-Server-Port", sprintf3("%i", ssl->port->sport));
280 headappheader(req, "X-Ash-Protocol", "https");
284 static void servessl(struct muth *muth, va_list args)
287 vavar(struct sockaddr_storage, name);
288 vavar(struct sslport *, pd);
291 gnutls_session_t sess;
294 int setcreds(gnutls_session_t sess)
302 namlen = sizeof(nambuf);
303 if(gnutls_server_name_get(sess, nambuf, &namlen, &ntype, i) != 0)
305 if(ntype != GNUTLS_NAME_DNS)
307 for(o = 0; pd->ncreds[o] != NULL; o++) {
308 for(u = 0; pd->ncreds[o]->names[u] != NULL; u++) {
309 if(!strcmp(pd->ncreds[o]->names[u], nambuf)) {
310 gnutls_credentials_set(sess, GNUTLS_CRD_CERTIFICATE, pd->ncreds[o]->creds);
311 gnutls_certificate_server_set_request(sess, GNUTLS_CERT_REQUEST);
317 gnutls_credentials_set(sess, GNUTLS_CRD_CERTIFICATE, pd->creds);
318 gnutls_certificate_server_set_request(sess, GNUTLS_CERT_REQUEST);
323 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
324 gnutls_init(&sess, GNUTLS_SERVER);
325 gnutls_priority_set(sess, pd->ciphers);
326 gnutls_db_set_retrieve_function(sess, sessdbfetch);
327 gnutls_db_set_store_function(sess, sessdbstore);
328 gnutls_db_set_remove_function(sess, sessdbdel);
329 gnutls_db_set_ptr(sess, NULL);
330 gnutls_handshake_set_post_client_hello_function(sess, setcreds);
331 gnutls_transport_set_ptr(sess, (gnutls_transport_ptr_t)(intptr_t)fd);
332 while((ret = gnutls_handshake(sess)) != 0) {
333 if((ret != GNUTLS_E_INTERRUPTED) && (ret != GNUTLS_E_AGAIN))
335 if(tlsblock(fd, sess, 60) <= 0)
338 memset(&conn, 0, sizeof(conn));
339 memset(&ssl, 0, sizeof(ssl));
341 conn.initreq = initreq;
347 serve(bioopen(&ssl, &iofuns), fd, &conn);
355 static void listenloop(struct muth *muth, va_list args)
357 vavar(struct sslport *, pd);
359 struct sockaddr_storage name;
362 fcntl(pd->fd, F_SETFL, fcntl(pd->fd, F_GETFL) | O_NONBLOCK);
364 namelen = sizeof(name);
365 if(block(pd->fd, EV_READ, 0) == 0)
369 ns = accept(pd->fd, (struct sockaddr *)&name, &namelen);
373 if(errno == ECONNABORTED)
375 flog(LOG_ERR, "accept: %s", strerror(errno));
378 mustart(servessl, ns, name, pd);
387 for(i = 0; i < listeners.d; i++) {
388 if(listeners.b[i] == muth)
389 bufdel(listeners, i);
393 static gnutls_dh_params_t dhparams(void)
395 static int inited = 0;
396 static gnutls_dh_params_t pars;
400 if(((ret = gnutls_dh_params_init(&pars)) != 0) ||
401 ((ret = gnutls_dh_params_generate2(pars, 2048)) != 0)) {
402 flog(LOG_ERR, "GnuTLS could not generate Diffie-Hellman parameters: %s", gnutls_strerror(ret));
410 static void init(void)
412 static int inited = 0;
418 if((ret = gnutls_global_init()) != 0) {
419 flog(LOG_ERR, "could not initialize GnuTLS: %s", gnutls_strerror(ret));
424 static struct namedcreds *readncreds(char *file)
427 struct namedcreds *nc;
428 gnutls_x509_crt_t crt;
429 gnutls_x509_privkey_t key;
433 struct charbuf keybuf;
434 struct charvbuf names;
439 if((fd = open(file, O_RDONLY)) < 0) {
440 flog(LOG_ERR, "ssl: %s: %s", file, strerror(errno));
444 sizebuf(keybuf, keybuf.d + 1024);
445 ret = read(fd, keybuf.b + keybuf.d, keybuf.s - keybuf.d);
447 flog(LOG_ERR, "ssl: reading from %s: %s", file, strerror(errno));
449 } else if(ret == 0) {
455 d.data = (unsigned char *)keybuf.b;
457 gnutls_x509_crt_init(&crt);
458 if((ret = gnutls_x509_crt_import(crt, &d, GNUTLS_X509_FMT_PEM)) != 0) {
459 flog(LOG_ERR, "ssl: could not load certificate from %s: %s", file, gnutls_strerror(ret));
462 cnl = sizeof(cn) - 1;
463 if((ret = gnutls_x509_crt_get_dn_by_oid(crt, GNUTLS_OID_X520_COMMON_NAME, 0, 0, cn, &cnl)) != 0) {
464 flog(LOG_ERR, "ssl: could not read common name from %s: %s", file, gnutls_strerror(ret));
468 bufadd(names, sstrdup(cn));
470 cnl = sizeof(cn) - 1;
471 if(gnutls_x509_crt_get_subject_alt_name2(crt, i, cn, &cnl, &type, NULL) < 0)
474 if(type == GNUTLS_SAN_DNSNAME)
475 bufadd(names, sstrdup(cn));
477 gnutls_x509_privkey_init(&key);
478 if((ret = gnutls_x509_privkey_import(key, &d, GNUTLS_X509_FMT_PEM)) != 0) {
479 flog(LOG_ERR, "ssl: could not load key from %s: %s", file, gnutls_strerror(ret));
486 gnutls_certificate_allocate_credentials(&nc->creds);
487 if((ret = gnutls_certificate_set_x509_key(nc->creds, &crt, 1, key)) != 0) {
488 flog(LOG_ERR, "ssl: could not use certificate from %s: %s", file, gnutls_strerror(ret));
491 gnutls_certificate_set_dh_params(nc->creds, dhparams());
495 static void readncdir(struct ncredbuf *buf, char *dir)
501 if((d = opendir(dir)) == NULL) {
502 flog(LOG_ERR, "ssl: could not read certificate directory %s: %s", dir, strerror(errno));
505 while((e = readdir(d)) != NULL) {
506 if(e->d_name[0] == '.')
508 if((es = strlen(e->d_name)) <= 4)
510 if(strcmp(e->d_name + es - 4, ".crt"))
512 bufadd(*buf, readncreds(sprintf3("%s/%s", dir, e->d_name)));
517 void handlegnussl(int argc, char **argp, char **argv)
519 int i, ret, port, fd;
520 gnutls_certificate_credentials_t creds;
521 gnutls_priority_t ciphers;
522 struct ncredbuf ncreds;
524 char *crtfile, *keyfile, *perr;
529 gnutls_certificate_allocate_credentials(&creds);
530 keyfile = crtfile = NULL;
532 for(i = 0; i < argc; i++) {
533 if(!strcmp(argp[i], "help")) {
534 printf("ssl handler parameters:\n");
535 printf("\tcert=CERT-FILE [mandatory]\n");
536 printf("\t\tThe name of the file to read the certificate from.\n");
537 printf("\tkey=KEY-FILE [same as CERT-FILE]\n");
538 printf("\t\tThe name of the file to read the private key from.\n");
539 printf("\tprio=PRIORITIES [NORMAL]\n");
540 printf("\t\tCiphersuite priorities, as a GnuTLS priority string.\n");
541 printf("\ttrust=CA-FILE [no default]\n");
542 printf("\t\tThe name of a file to read trusted certificates from.\n");
543 printf("\t\tMay be given multiple times.\n");
544 printf("\tcrl=CRL-FILE [no default]\n");
545 printf("\t\tThe name of a file to read revocation lists from.\n");
546 printf("\t\tMay be given multiple times.\n");
547 printf("\tncert=CERT-FILE [no default]\n");
548 printf("\t\tThe name of a file to read a named certificate from,\n");
549 printf("\t\tfor use with SNI-enabled clients.\n");
550 printf("\t\tMay be given multiple times.\n");
551 printf("\tncertdir=DIR [no default]\n");
552 printf("\t\tRead all *.crt files in the given directory as if they\n");
553 printf("\t\twere given with `ncert' options.\n");
554 printf("\t\tMay be given multiple times.\n");
555 printf("\tport=PORT [443]\n");
556 printf("\t\tThe TCP port to listen on.\n");
558 printf("\tAll X.509 data files must be PEM-encoded.\n");
559 printf("\tIf any certificates were given with `ncert' options, they will be\n");
560 printf("\tused if a client explicitly names one of them with a\n");
561 printf("\tserver-name indication. If a client indicates no server name,\n");
562 printf("\tor if a server-name indication does not match any given\n");
563 printf("\tcertificate, the certificate given with the `cert' option will\n");
564 printf("\tbe used instead.\n");
566 } else if(!strcmp(argp[i], "cert")) {
568 } else if(!strcmp(argp[i], "key")) {
570 } else if(!strcmp(argp[i], "prio")) {
572 gnutls_priority_deinit(ciphers);
573 ret = gnutls_priority_init(&ciphers, argv[i], (const char **)&perr);
574 if(ret == GNUTLS_E_INVALID_REQUEST) {
575 flog(LOG_ERR, "ssl: invalid cipher priority string, at `%s'", perr);
577 } else if(ret != 0) {
578 flog(LOG_ERR, "ssl: could not initialize cipher priorities: %s", gnutls_strerror(ret));
581 } else if(!strcmp(argp[i], "trust")) {
582 if((ret = gnutls_certificate_set_x509_trust_file(creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) {
583 flog(LOG_ERR, "ssl: could not load trust file `%s': %s", argv[i], gnutls_strerror(ret));
586 for(i = 0; i < ncreds.d; i++) {
587 if((ret = gnutls_certificate_set_x509_trust_file(ncreds.b[i]->creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) {
588 flog(LOG_ERR, "ssl: could not load trust file `%s': %s", argv[i], gnutls_strerror(ret));
592 } else if(!strcmp(argp[i], "crl")) {
593 if((ret = gnutls_certificate_set_x509_crl_file(creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) {
594 flog(LOG_ERR, "ssl: could not load CRL file `%s': %s", argv[i], gnutls_strerror(ret));
597 for(i = 0; i < ncreds.d; i++) {
598 if((ret = gnutls_certificate_set_x509_crl_file(ncreds.b[i]->creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) {
599 flog(LOG_ERR, "ssl: could not load CRL file `%s': %s", argv[i], gnutls_strerror(ret));
603 } else if(!strcmp(argp[i], "port")) {
604 port = atoi(argv[i]);
605 } else if(!strcmp(argp[i], "ncert")) {
606 bufadd(ncreds, readncreds(argv[i]));
607 } else if(!strcmp(argp[i], "ncertdir")) {
608 readncdir(&ncreds, argv[i]);
610 flog(LOG_ERR, "unknown parameter `%s' to ssl handler", argp[i]);
614 if(crtfile == NULL) {
615 flog(LOG_ERR, "ssl: needs certificate file at the very least");
618 if((fd = listensock6(port)) < 0) {
619 flog(LOG_ERR, "could not listen on IPv6 port (port %i): %s", port, strerror(errno));
624 if((ret = gnutls_certificate_set_x509_key_file(creds, crtfile, keyfile, GNUTLS_X509_FMT_PEM)) != 0) {
625 flog(LOG_ERR, "ssl: could not load certificate or key: %s", gnutls_strerror(ret));
628 if((ciphers == NULL) && ((ret = gnutls_priority_init(&ciphers, "NORMAL", NULL)) != 0)) {
629 flog(LOG_ERR, "ssl: could not initialize cipher priorities: %s", gnutls_strerror(ret));
632 gnutls_certificate_set_dh_params(creds, dhparams());
633 bufadd(ncreds, NULL);
638 pd->ncreds = ncreds.b;
639 pd->ciphers = ciphers;
640 bufadd(listeners, mustart(listenloop, pd));
641 if((fd = listensock4(port)) < 0) {
642 if(errno != EADDRINUSE) {
643 flog(LOG_ERR, "could not listen on IPv4 port (port %i): %s", port, strerror(errno));
651 pd->ncreds = ncreds.b;
652 pd->ciphers = ciphers;
653 bufadd(listeners, mustart(listenloop, pd));