2 * Copyright (C) 2006 Stig Venaas <venaas@uninett.no>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
10 * peers can not yet be specified with literal IPv6 addresses due to port syntax
15 * timer based client retrans or maybe no retrans and just a timer...
16 * make our server ignore client retrans?
18 * routing based on id....
19 * need to also encrypt Tunnel-Password and Message-Authenticator attrs
20 * tls certificate validation
23 /* For UDP there is one server instance consisting of udpserverrd and udpserverth
24 * rd is responsible for init and launching wr
25 * For TLS there is a server instance that launches tlsserverrd for each TLS peer
26 * each tlsserverrd launches tlsserverwr
27 * For each UDP/TLS peer there is clientrd and clientwr, clientwr is responsible
28 * for init and launching rd
30 * serverrd will receive a request, processes it and puts it in the requestq of
31 * the appropriate clientwr
32 * clientwr monitors its requestq and sends requests
33 * clientrd looks for responses, processes them and puts them in the replyq of
34 * the peer the request came from
35 * serverwr monitors its reply and sends replies
37 * In addition to the main thread, we have:
38 * If UDP peers are configured, there will be 2 + 2 * #peers UDP threads
39 * If TLS peers are configured, there will initially be 2 * #peers TLS threads
40 * For each TLS peer connecting to us there will be 2 more TLS threads
41 * This is only for connected peers
42 * Example: With 3 UDP peer and 30 TLS peers, there will be a max of
43 * 1 + (2 + 2 * 3) + (2 * 30) + (2 * 30) = 129 threads
50 #include <openssl/ssl.h>
51 #include <openssl/rand.h>
52 #include <openssl/err.h>
53 #include <openssl/md5.h>
54 #include "radsecproxy.h"
56 static struct client clients[MAX_PEERS];
57 static struct server servers[MAX_PEERS];
59 static int client_count = 0;
60 static int server_count = 0;
62 static struct replyq udp_server_replyq;
63 static int udp_server_sock = -1;
64 static char *udp_server_port = DEFAULT_UDP_PORT;
65 static pthread_mutex_t *ssl_locks;
66 static long *ssl_lock_count;
67 static SSL_CTX *ssl_ctx_cl;
71 /* callbacks for making OpenSSL thread safe */
72 unsigned long ssl_thread_id() {
73 return (unsigned long)pthread_self();
76 void ssl_locking_callback(int mode, int type, const char *file, int line) {
77 if (mode & CRYPTO_LOCK) {
78 pthread_mutex_lock(&ssl_locks[type]);
79 ssl_lock_count[type]++;
81 pthread_mutex_unlock(&ssl_locks[type]);
84 void ssl_locks_setup() {
87 ssl_locks = malloc(CRYPTO_num_locks() * sizeof(pthread_mutex_t));
88 ssl_lock_count = OPENSSL_malloc(CRYPTO_num_locks() * sizeof(long));
89 for (i = 0; i < CRYPTO_num_locks(); i++) {
90 ssl_lock_count[i] = 0;
91 pthread_mutex_init(&ssl_locks[i], NULL);
94 CRYPTO_set_id_callback(ssl_thread_id);
95 CRYPTO_set_locking_callback(ssl_locking_callback);
98 int resolvepeer(struct peer *peer) {
99 struct addrinfo hints, *addrinfo;
101 memset(&hints, 0, sizeof(hints));
102 hints.ai_socktype = (peer->type == 'T' ? SOCK_STREAM : SOCK_DGRAM);
103 hints.ai_family = AF_UNSPEC;
104 if (getaddrinfo(peer->host, peer->port, &hints, &addrinfo)) {
105 err("resolvepeer: can't resolve %s port %s", peer->host, peer->port);
110 freeaddrinfo(peer->addrinfo);
111 peer->addrinfo = addrinfo;
115 int connecttoserver(struct addrinfo *addrinfo) {
117 struct addrinfo *res;
119 for (res = addrinfo; res; res = res->ai_next) {
120 s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
122 err("connecttoserver: socket failed");
125 if (connect(s, res->ai_addr, res->ai_addrlen) == 0)
127 err("connecttoserver: connect failed");
134 /* returns the client with matching address, or NULL */
135 /* if client argument is not NULL, we only check that one client */
136 struct client *find_client(char type, struct sockaddr *addr, struct client *client) {
137 struct sockaddr_in6 *sa6;
138 struct in_addr *a4 = NULL;
141 struct addrinfo *res;
143 if (addr->sa_family == AF_INET6) {
144 sa6 = (struct sockaddr_in6 *)addr;
145 if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr))
146 a4 = (struct in_addr *)&sa6->sin6_addr.s6_addr[12];
148 a4 = &((struct sockaddr_in *)addr)->sin_addr;
150 c = (client ? client : clients);
151 for (i = 0; i < client_count; i++) {
152 if (c->peer.type == type)
153 for (res = c->peer.addrinfo; res; res = res->ai_next)
154 if ((a4 && res->ai_family == AF_INET &&
155 !memcmp(a4, &((struct sockaddr_in *)res->ai_addr)->sin_addr, 4)) ||
156 (res->ai_family == AF_INET6 &&
157 !memcmp(&sa6->sin6_addr, &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 16)))
166 /* returns the server with matching address, or NULL */
167 /* if server argument is not NULL, we only check that one server */
168 struct server *find_server(char type, struct sockaddr *addr, struct server *server) {
169 struct sockaddr_in6 *sa6;
170 struct in_addr *a4 = NULL;
173 struct addrinfo *res;
175 if (addr->sa_family == AF_INET6) {
176 sa6 = (struct sockaddr_in6 *)addr;
177 if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr))
178 a4 = (struct in_addr *)&sa6->sin6_addr.s6_addr[12];
180 a4 = &((struct sockaddr_in *)addr)->sin_addr;
182 s = (server ? server : servers);
183 for (i = 0; i < server_count; i++) {
184 if (s->peer.type == type)
185 for (res = s->peer.addrinfo; res; res = res->ai_next)
186 if ((a4 && res->ai_family == AF_INET &&
187 !memcmp(a4, &((struct sockaddr_in *)res->ai_addr)->sin_addr, 4)) ||
188 (res->ai_family == AF_INET6 &&
189 !memcmp(&sa6->sin6_addr, &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 16)))
198 /* exactly one of client and server must be non-NULL */
199 /* if *peer == NULL we return who we received from, else require it to be from peer */
200 /* return from in sa if not NULL */
201 unsigned char *radudpget(int s, struct client **client, struct server **server, struct sockaddr_storage *sa) {
204 unsigned char buf[65536], *rad;
205 struct sockaddr_storage from;
206 socklen_t fromlen = sizeof(from);
209 cnt = recvfrom(s, buf, sizeof(buf), 0, (struct sockaddr *)&from, &fromlen);
211 err("radudpget: recv failed");
214 printf("radudpget: got %d bytes from %s\n", cnt, addr2string((struct sockaddr *)&from, fromlen));
217 printf("radudpget: packet too small\n");
224 printf("radudpget: packet smaller than length field in radius header\n");
228 printf("radudpget: packet was padded with %d bytes\n", cnt - len);
231 ? (void *)find_client('U', (struct sockaddr *)&from, *client)
232 : (void *)find_server('U', (struct sockaddr *)&from, *server));
234 printf("radudpget: got packet from wrong or unknown UDP peer, ignoring\n");
241 err("radudpget: malloc failed");
243 memcpy(rad, buf, len);
245 *client = (struct client *)f; /* only need this if *client == NULL, but if not NULL *client == f here */
247 *server = (struct server *)f; /* only need this if *server == NULL, but if not NULL *server == f here */
253 void tlsconnect(struct server *server, struct timeval *when, char *text) {
258 printf("tlsconnect called from %s\n", text);
259 pthread_mutex_lock(&server->lock);
260 if (when && memcmp(&server->lastconnecttry, when, sizeof(struct timeval))) {
261 /* already reconnected, nothing to do */
262 printf("tlsconnect(%s): seems already reconnected\n", text);
263 pthread_mutex_unlock(&server->lock);
267 printf("tlsconnect %s\n", text);
270 gettimeofday(&now, NULL);
271 elapsed = now.tv_sec - server->lastconnecttry.tv_sec;
272 if (server->connectionok) {
273 server->connectionok = 0;
275 } else if (elapsed < 5)
277 else if (elapsed < 600)
279 else if (elapsed < 10000) /* no sleep at startup */
281 printf("tlsconnect: trying to open TLS connection to %s port %s\n", server->peer.host, server->peer.port);
282 if (server->sock >= 0)
284 if ((server->sock = connecttoserver(server->peer.addrinfo)) < 0)
286 SSL_free(server->peer.ssl);
287 server->peer.ssl = SSL_new(ssl_ctx_cl);
288 SSL_set_fd(server->peer.ssl, server->sock);
289 if (SSL_connect(server->peer.ssl) > 0)
291 while ((error = ERR_get_error()))
292 err("tlsconnect: TLS: %s", ERR_error_string(error, NULL));
294 printf("tlsconnect: TLS connection to %s port %s up\n", server->peer.host, server->peer.port);
295 gettimeofday(&server->lastconnecttry, NULL);
296 pthread_mutex_unlock(&server->lock);
299 unsigned char *radtlsget(SSL *ssl) {
301 unsigned char buf[4], *rad;
304 for (total = 0; total < 4; total += cnt) {
305 cnt = SSL_read(ssl, buf + total, 4 - total);
307 printf("radtlsget: connection lost\n");
315 err("radtlsget: malloc failed");
320 for (; total < len; total += cnt) {
321 cnt = SSL_read(ssl, rad + total, len - total);
323 printf("radtlsget: connection lost\n");
333 printf("radtlsget: packet smaller than minimum radius size\n");
336 printf("radtlsget: got %d bytes\n", total);
340 int clientradput(struct server *server, unsigned char *rad) {
344 struct timeval lastconnecttry;
347 if (server->peer.type == 'U') {
348 if (send(server->sock, rad, len, 0) >= 0) {
349 printf("clienradput: sent UDP of length %d to %s port %s\n", len, server->peer.host, server->peer.port);
352 err("clientradput: send failed");
356 lastconnecttry = server->lastconnecttry;
357 while ((cnt = SSL_write(server->peer.ssl, rad, len)) <= 0) {
358 while ((error = ERR_get_error()))
359 err("clientwr: TLS: %s", ERR_error_string(error, NULL));
360 tlsconnect(server, &lastconnecttry, "clientradput");
361 lastconnecttry = server->lastconnecttry;
364 server->connectionok = 1;
365 printf("clientradput: Sent %d bytes, Radius packet of length %d to TLS peer %s\n",
366 cnt, len, server->peer.host);
370 int radsign(unsigned char *rad, unsigned char *sec) {
371 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
372 static unsigned char first = 1;
373 static EVP_MD_CTX mdctx;
377 pthread_mutex_lock(&lock);
379 EVP_MD_CTX_init(&mdctx);
383 result = (EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) &&
384 EVP_DigestUpdate(&mdctx, rad, RADLEN(rad)) &&
385 EVP_DigestUpdate(&mdctx, sec, strlen(sec)) &&
386 EVP_DigestFinal_ex(&mdctx, rad + 4, &md_len) &&
388 pthread_mutex_unlock(&lock);
392 int validauth(unsigned char *rad, unsigned char *reqauth, unsigned char *sec) {
393 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
394 static unsigned char first = 1;
395 static EVP_MD_CTX mdctx;
396 unsigned char hash[EVP_MAX_MD_SIZE];
400 pthread_mutex_lock(&lock);
402 EVP_MD_CTX_init(&mdctx);
408 result = (EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) &&
409 EVP_DigestUpdate(&mdctx, rad, 4) &&
410 EVP_DigestUpdate(&mdctx, reqauth, 16) &&
411 (len <= 20 || EVP_DigestUpdate(&mdctx, rad + 20, len - 20)) &&
412 EVP_DigestUpdate(&mdctx, sec, strlen(sec)) &&
413 EVP_DigestFinal_ex(&mdctx, hash, &len) &&
415 !memcmp(hash, rad + 4, 16));
416 pthread_mutex_unlock(&lock);
420 void sendrq(struct server *to, struct client *from, struct request *rq) {
423 pthread_mutex_lock(&to->newrq_mutex);
424 for (i = 0; i < MAX_REQUESTS; i++)
425 if (!to->requests[i].buf)
427 if (i == MAX_REQUESTS) {
428 printf("No room in queue, dropping request\n");
429 pthread_mutex_unlock(&to->newrq_mutex);
433 rq->buf[1] = (char)i;
434 to->requests[i] = *rq;
438 printf("signalling client writer\n");
439 pthread_cond_signal(&to->newrq_cond);
441 pthread_mutex_unlock(&to->newrq_mutex);
444 void sendreply(struct client *to, struct server *from, char *buf, struct sockaddr_storage *tosa) {
445 struct replyq *replyq = to->replyq;
447 pthread_mutex_lock(&replyq->count_mutex);
448 if (replyq->count == replyq->size) {
449 printf("No room in queue, dropping request\n");
450 pthread_mutex_unlock(&replyq->count_mutex);
454 replyq->replies[replyq->count].buf = buf;
456 replyq->replies[replyq->count].tosa = *tosa;
459 if (replyq->count == 1) {
460 printf("signalling client writer\n");
461 pthread_cond_signal(&replyq->count_cond);
463 pthread_mutex_unlock(&replyq->count_mutex);
466 int pwdcrypt(uint8_t *plain, uint8_t *enc, uint8_t enclen, uint8_t *shared, uint8_t sharedlen,
468 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
469 static unsigned char first = 1;
470 static EVP_MD_CTX mdctx;
471 unsigned char hash[EVP_MAX_MD_SIZE], *input;
473 uint8_t i, offset = 0;
475 pthread_mutex_lock(&lock);
477 EVP_MD_CTX_init(&mdctx);
483 if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) ||
484 !EVP_DigestUpdate(&mdctx, shared, sharedlen) ||
485 !EVP_DigestUpdate(&mdctx, input, 16) ||
486 !EVP_DigestFinal_ex(&mdctx, hash, &md_len) ||
488 pthread_mutex_unlock(&lock);
491 for (i = 0; i < 16; i++)
492 plain[offset + i] = hash[i] ^ enc[offset + i];
494 if (offset == enclen)
496 input = enc + offset - 16;
498 pthread_mutex_unlock(&lock);
502 struct server *id2server(char *id, uint8_t len) {
504 char **realm, *idrealm;
506 idrealm = strchr(id, '@');
514 for (i = 0; i < server_count; i++) {
515 for (realm = servers[i].realms; *realm; realm++) {
516 if ((strlen(*realm) == 1 && **realm == '*') ||
517 (strlen(*realm) == len && !memcmp(idrealm, *realm, len))) {
518 printf("found matching realm: %s, host %s\n", *realm, servers[i].peer.host);
526 struct server *radsrv(struct request *rq, char *buf, struct client *from) {
527 uint8_t code, id, *auth, *attr, *usernameattr = NULL, *userpwdattr = NULL, pwd[128], pwdlen;
532 unsigned char newauth[16];
534 code = *(uint8_t *)buf;
535 id = *(uint8_t *)(buf + 1);
537 auth = (uint8_t *)(buf + 4);
539 printf("radsrv: code %d, id %d, length %d\n", code, id, len);
541 if (code != RAD_Access_Request) {
542 printf("radsrv: server currently accepts only access-requests, ignoring\n");
550 left -= attr[RAD_Attr_Length];
552 printf("radsrv: attribute length exceeds packet length, ignoring packet\n");
555 switch (attr[RAD_Attr_Type]) {
556 case RAD_Attr_User_Name:
559 case RAD_Attr_User_Password:
563 attr += attr[RAD_Attr_Length];
566 printf("radsrv: malformed packet? remaining byte after last attribute\n");
569 printf("radsrv: Username: ");
570 for (i = 0; i < usernameattr[RAD_Attr_Length] - 2; i++)
571 printf("%c", usernameattr[RAD_Attr_Value + i]);
575 to = id2server(&usernameattr[RAD_Attr_Value], usernameattr[RAD_Attr_Length] - 2);
577 printf("radsrv: ignoring request, don't know where to send it\n");
581 if (!RAND_bytes(newauth, 16)) {
582 printf("radsrv: failed to generate random auth\n");
587 printf("radsrv: found userpwdattr of length %d\n", userpwdattr[RAD_Attr_Length]);
588 pwdlen = userpwdattr[RAD_Attr_Length] - 2;
589 if (pwdlen < 16 || pwdlen > 128 || pwdlen % 16) {
590 printf("radsrv: invalid user password length\n");
594 if (!pwdcrypt(pwd, &userpwdattr[RAD_Attr_Value], pwdlen, from->peer.secret, strlen(from->peer.secret), auth)) {
595 printf("radsrv: cannot decrypt password\n");
598 printf("radsrv: password: ");
599 for (i = 0; i < pwdlen; i++)
600 printf("%02x ", pwd[i]);
602 if (!pwdcrypt(&userpwdattr[RAD_Attr_Value], pwd, pwdlen, to->peer.secret, strlen(to->peer.secret), newauth)) {
603 printf("radsrv: cannot encrypt password\n");
611 memcpy(rq->origauth, auth, 16);
612 memcpy(rq->buf + 4, newauth, 16);
616 void *clientrd(void *arg) {
617 struct server *server = (struct server *)arg;
621 struct sockaddr_storage fromsa;
622 struct timeval lastconnecttry;
625 lastconnecttry = server->lastconnecttry;
626 buf = (server->peer.type == 'U' ? radudpget(server->sock, NULL, &server, NULL) : radtlsget(server->peer.ssl));
627 if (!buf && server->peer.type == 'T') {
628 tlsconnect(server, &lastconnecttry, "clientrd");
632 server->connectionok = 1;
634 i = buf[1]; /* i is the id */
636 pthread_mutex_lock(&server->newrq_mutex);
637 if (!server->requests[i].buf || !server->requests[i].tries) {
638 pthread_mutex_unlock(&server->newrq_mutex);
639 printf("clientrd: no matching request sent with this id, ignoring\n");
643 if (server->requests[i].received) {
644 pthread_mutex_unlock(&server->newrq_mutex);
645 printf("clientrd: already received, ignoring\n");
649 if (!validauth(buf, server->requests[i].buf + 4, server->peer.secret)) {
650 pthread_mutex_unlock(&server->newrq_mutex);
651 printf("clientrd: invalid auth, ignoring\n");
655 /* once we set received = 1, requests[i] may be reused */
656 buf[1] = (char)server->requests[i].origid;
657 memcpy(buf + 4, server->requests[i].origauth, 16);
658 from = server->requests[i].from;
659 if (from->peer.type == 'U')
660 fromsa = server->requests[i].fromsa;
661 server->requests[i].received = 1;
662 pthread_mutex_unlock(&server->newrq_mutex);
664 if (!radsign(buf, from->peer.secret)) {
665 printf("clientrd: failed to sign message\n");
669 printf("clientrd: giving packet back to where it came from\n");
670 sendreply(from, server, buf, from->peer.type == 'U' ? &fromsa : NULL);
674 void *clientwr(void *arg) {
675 struct server *server = (struct server *)arg;
676 pthread_t clientrdth;
679 if (server->peer.type == 'U') {
680 if ((server->sock = connecttoserver(server->peer.addrinfo)) < 0) {
681 printf("clientwr: connecttoserver failed\n");
685 tlsconnect(server, NULL, "new client");
687 if (pthread_create(&clientrdth, NULL, clientrd, (void *)server))
688 errx("clientwr: pthread_create failed");
691 pthread_mutex_lock(&server->newrq_mutex);
692 while (!server->newrq) {
693 printf("clientwr: waiting for signal\n");
694 pthread_cond_wait(&server->newrq_cond, &server->newrq_mutex);
695 printf("clientwr: got signal\n");
698 pthread_mutex_unlock(&server->newrq_mutex);
700 for (i = 0; i < MAX_REQUESTS; i++) {
701 pthread_mutex_lock(&server->newrq_mutex);
702 while (!server->requests[i].buf && i < MAX_REQUESTS)
704 if (i == MAX_REQUESTS) {
705 pthread_mutex_unlock(&server->newrq_mutex);
709 /* already received or too many tries */
710 if (server->requests[i].received || server->requests[i].tries > 2) {
711 free(server->requests[i].buf);
712 /* setting this to NULL means that it can be reused */
713 server->requests[i].buf = NULL;
714 pthread_mutex_unlock(&server->newrq_mutex);
717 pthread_mutex_unlock(&server->newrq_mutex);
719 server->requests[i].tries++;
720 clientradput(server, server->requests[i].buf);
723 /* should do more work to maintain TLS connections, keepalives etc */
726 void *udpserverwr(void *arg) {
727 struct replyq *replyq = &udp_server_replyq;
728 struct reply *reply = replyq->replies;
730 pthread_mutex_lock(&replyq->count_mutex);
732 while (!replyq->count) {
733 printf("udp server writer, waiting for signal\n");
734 pthread_cond_wait(&replyq->count_cond, &replyq->count_mutex);
735 printf("udp server writer, got signal\n");
737 pthread_mutex_unlock(&replyq->count_mutex);
739 if (sendto(udp_server_sock, reply->buf, RADLEN(reply->buf), 0,
740 (struct sockaddr *)&reply->tosa, SOCKADDR_SIZE(reply->tosa)) < 0)
741 err("sendudp: send failed");
744 pthread_mutex_lock(&replyq->count_mutex);
746 memmove(replyq->replies, replyq->replies + 1,
747 replyq->count * sizeof(struct reply));
751 void *udpserverrd(void *arg) {
756 pthread_t udpserverwrth;
758 if ((udp_server_sock = bindport(SOCK_DGRAM, udp_server_port)) < 0) {
759 printf("udpserverrd: socket/bind failed\n");
762 printf("udpserverrd: listening on UDP port %s\n", udp_server_port);
764 if (pthread_create(&udpserverwrth, NULL, udpserverwr, NULL))
765 errx("pthread_create failed");
769 memset(&rq, 0, sizeof(struct request));
770 buf = radudpget(udp_server_sock, &fr, NULL, &rq.fromsa);
771 to = radsrv(&rq, buf, fr);
773 printf("udpserverrd: ignoring request, no place to send it\n");
780 void *tlsserverwr(void *arg) {
783 struct client *client = (struct client *)arg;
784 struct replyq *replyq;
786 pthread_mutex_lock(&client->replycount_mutex);
788 replyq = client->replyq;
789 while (!replyq->count) {
790 printf("tls server writer, waiting for signal\n");
791 pthread_cond_wait(&replyq->count_cond, &replyq->count_mutex);
792 printf("tls server writer, got signal\n");
794 pthread_mutex_unlock(&replyq->count_mutex);
795 cnt = SSL_write(client->peer.ssl, replyq->replies->buf, RADLEN(replyq->replies->buf));
797 printf("tlsserverwr: Sent %d bytes, Radius packet of length %d\n",
798 cnt, RADLEN(replyq->replies->buf));
800 while ((error = ERR_get_error()))
801 err("tlsserverwr: SSL: %s", ERR_error_string(error, NULL));
802 free(replyq->replies->buf);
804 pthread_mutex_lock(&replyq->count_mutex);
806 memmove(replyq->replies, replyq->replies + 1, replyq->count * sizeof(struct reply));
810 void *tlsserverrd(void *arg) {
816 struct client *client = (struct client *)arg;
817 pthread_t tlsserverwrth;
819 printf("tlsserverrd starting\n");
820 if (SSL_accept(client->peer.ssl) <= 0) {
821 while ((error = ERR_get_error()))
822 err("tlsserverrd: SSL: %s", ERR_error_string(error, NULL));
823 errx("accept failed, child exiting");
826 if (pthread_create(&tlsserverwrth, NULL, tlsserverwr, (void *)client))
827 errx("pthread_create failed");
830 buf = radtlsget(client->peer.ssl);
832 printf("tlsserverrd: connection lost\n");
833 s = SSL_get_fd(client->peer.ssl);
834 SSL_free(client->peer.ssl);
835 client->peer.ssl = NULL;
840 printf("tlsserverrd: got Radius message from %s\n", client->peer.host);
841 memset(&rq, 0, sizeof(struct request));
842 to = radsrv(&rq, buf, client);
844 printf("ignoring request, no place to send it\n");
847 sendrq(to, client, &rq);
851 int tlslistener(SSL_CTX *ssl_ctx) {
852 pthread_t tlsserverth;
854 struct sockaddr_storage from;
855 size_t fromlen = sizeof(from);
856 struct client *client;
858 if ((s = bindport(SOCK_STREAM, DEFAULT_TLS_PORT)) < 0) {
859 printf("tlslistener: socket/bind failed\n");
864 printf("listening for incoming TLS on port %s\n", DEFAULT_TLS_PORT);
867 snew = accept(s, (struct sockaddr *)&from, &fromlen);
869 errx("accept failed");
870 printf("incoming TLS connection from %s\n", addr2string((struct sockaddr *)&from, fromlen));
872 client = find_client('T', (struct sockaddr *)&from, NULL);
874 printf("ignoring request, not a known TLS client\n");
879 if (client->peer.ssl) {
880 printf("Ignoring incoming connection, already have one from this client\n");
884 client->peer.ssl = SSL_new(ssl_ctx);
885 SSL_set_fd(client->peer.ssl, snew);
886 if (pthread_create(&tlsserverth, NULL, tlsserverrd, (void *)client))
887 errx("pthread_create failed");
892 char *parsehostport(char *s, struct peer *peer) {
897 // allow literal addresses and port, e.g. [2001:db8::1]:1812
901 for (; *p && *p != ']' && *p != ' ' && *p != '\t' && *p != '\n'; p++);
903 printf("no ] matching initial [\n");
909 for (; *p && *p != ':' && *p != ' ' && *p != '\t' && *p != '\n'; p++);
912 printf("missing host/address\n");
915 peer->host = malloc(p - field + 1);
917 errx("malloc failed");
918 memcpy(peer->host, field, p - field);
919 peer->host[p - field] = '\0';
922 if (*p && *p != ':' && *p != ' ' && *p != '\t' && *p != '\n') {
923 printf("unexpected character after ]\n");
928 /* port number or service name is specified */;
930 for (; *p && *p != ' ' && *p != '\t' && *p != '\n'; p++);
932 printf("syntax error, : but no following port\n");
935 peer->port = malloc(p - field + 1);
937 errx("malloc failed");
938 memcpy(peer->port, field, p - field);
939 peer->port[p - field] = '\0';
945 // * is default, else longest match ... ";" used for separator
946 char *parserealmlist(char *s, struct server *server) {
950 for (p = s, n = 1; *p && *p != ' ' && *p != '\t' && *p != '\n'; p++)
955 server->realms = NULL;
958 server->realmdata = malloc(l + 1);
959 if (!server->realmdata)
960 errx("malloc failed");
961 memcpy(server->realmdata, s, l);
962 server->realmdata[l] = '\0';
963 server->realms = malloc((1+n) * sizeof(char *));
965 errx("malloc failed");
966 server->realms[0] = server->realmdata;
967 for (n = 1, i = 0; i < l; i++)
968 if (server->realmdata[i] == ';') {
969 server->realmdata[i] = '\0';
970 server->realms[n++] = server->realmdata + i + 1;
972 server->realms[n] = NULL;
976 /* exactly one argument must be non-NULL */
977 void getconfig(const char *serverfile, const char *clientfile) {
980 char *p, *field, **r;
981 struct client *client;
982 struct server *server;
987 printf("opening file %s for reading\n", serverfile);
988 f = fopen(serverfile, "r");
990 errx("getconfig failed to open %s for reading", serverfile);
991 count = &server_count;
993 printf("opening file %s for reading\n", clientfile);
994 f = fopen(clientfile, "r");
996 errx("getconfig failed to open %s for reading", clientfile);
997 udp_server_replyq.replies = malloc(4 * MAX_REQUESTS * sizeof(struct reply));
998 if (!udp_server_replyq.replies)
999 errx("malloc failed");
1000 udp_server_replyq.size = 4 * MAX_REQUESTS;
1001 udp_server_replyq.count = 0;
1002 pthread_mutex_init(&udp_server_replyq.count_mutex, NULL);
1003 pthread_cond_init(&udp_server_replyq.count_cond, NULL);
1004 count = &client_count;
1008 while (fgets(line, 1024, f) && *count < MAX_PEERS) {
1010 server = &servers[*count];
1011 memset(server, 0, sizeof(struct server));
1012 peer = &server->peer;
1014 client = &clients[*count];
1015 memset(client, 0, sizeof(struct client));
1016 peer = &client->peer;
1018 for (p = line; *p == ' ' || *p == '\t'; p++);
1019 if (*p == '#' || *p == '\n')
1021 if (*p != 'U' && *p != 'T') {
1022 printf("server type must be U or T, got %c\n", *p);
1026 for (p++; *p == ' ' || *p == '\t'; p++);
1027 p = parsehostport(p, peer);
1029 peer->port = (peer->type == 'U' ? DEFAULT_UDP_PORT : DEFAULT_TLS_PORT);
1030 for (; *p == ' ' || *p == '\t'; p++);
1032 p = parserealmlist(p, server);
1033 if (!server->realms) {
1034 printf("realm list must be specified\n");
1037 for (; *p == ' ' || *p == '\t'; p++);
1040 for (; *p && *p != ' ' && *p != '\t' && *p != '\n'; p++);
1042 /* no secret set and end of line, line is complete if TLS */
1043 if (peer->type == 'U') {
1044 printf("secret must be specified for UDP\n");
1047 peer->secret = DEFAULT_TLS_SECRET;
1049 peer->secret = malloc(p - field + 1);
1051 errx("malloc failed");
1052 memcpy(peer->secret, field, p - field);
1053 peer->secret[p - field] = '\0';
1054 /* check that rest of line only white space */
1055 for (; *p == ' ' || *p == '\t'; p++);
1056 if (*p && *p != '\n') {
1057 printf("max 4 fields per line, found a 5th\n");
1062 if ((serverfile && !resolvepeer(&server->peer)) ||
1063 (clientfile && !resolvepeer(&client->peer))) {
1064 printf("failed to resolve host %s port %s, exiting\n", peer->host, peer->port);
1069 pthread_mutex_init(&server->lock, NULL);
1071 server->requests = malloc(MAX_REQUESTS * sizeof(struct request));
1072 if (!server->requests)
1073 errx("malloc failed");
1074 memset(server->requests, 0, MAX_REQUESTS * sizeof(struct request));
1076 pthread_mutex_init(&server->newrq_mutex, NULL);
1077 pthread_cond_init(&server->newrq_cond, NULL);
1079 if (peer->type == 'U')
1080 client->replyq = &udp_server_replyq;
1082 client->replyq = malloc(sizeof(struct replyq));
1083 if (!client->replyq)
1084 errx("malloc failed");
1085 client->replyq->replies = malloc(MAX_REQUESTS * sizeof(struct reply));
1086 if (!client->replyq->replies)
1087 errx("malloc failed");
1088 client->replyq->size = MAX_REQUESTS;
1089 client->replyq->count = 0;
1090 pthread_mutex_init(&client->replyq->count_mutex, NULL);
1091 pthread_cond_init(&client->replyq->count_cond, NULL);
1094 printf("got type %c, host %s, port %s, secret %s\n", peer->type, peer->host, peer->port, peer->secret);
1096 printf(" with realms:");
1097 for (r = server->realms; *r; r++)
1106 void parseargs(int argc, char **argv) {
1109 while ((c = getopt(argc, argv, "p:")) != -1) {
1112 udp_server_port = optarg;
1122 printf("radsecproxy [ -p UDP-port ]\n");
1126 int main(int argc, char **argv) {
1127 SSL_CTX *ssl_ctx_srv;
1128 unsigned long error;
1129 pthread_t udpserverth;
1130 pthread_attr_t joinable;
1133 parseargs(argc, argv);
1134 getconfig("servers.conf", NULL);
1135 getconfig(NULL, "clients.conf");
1139 pthread_attr_init(&joinable);
1140 pthread_attr_setdetachstate(&joinable, PTHREAD_CREATE_JOINABLE);
1142 /* listen on UDP if at least one UDP client */
1144 for (i = 0; i < client_count; i++)
1145 if (clients[i].peer.type == 'U') {
1146 if (pthread_create(&udpserverth, &joinable, udpserverrd, NULL))
1147 errx("pthread_create failed");
1152 SSL_load_error_strings();
1155 while (!RAND_status()) {
1156 time_t t = time(NULL);
1157 pid_t pid = getpid();
1158 RAND_seed((unsigned char *)&t, sizeof(time_t));
1159 RAND_seed((unsigned char *)&pid, sizeof(pid));
1162 /* initialise client part and start clients */
1163 ssl_ctx_cl = SSL_CTX_new(TLSv1_client_method());
1167 for (i = 0; i < server_count; i++) {
1168 if (pthread_create(&servers[i].clientth, NULL, clientwr, (void *)&servers[i]))
1169 errx("pthread_create failed");
1172 for (i = 0; i < client_count; i++)
1173 if (clients[i].peer.type == 'T')
1176 if (i == client_count) {
1177 printf("No TLS clients defined, not starting TLS listener\n");
1178 /* just hang around doing nothing, anything to do here? */
1183 /* setting up server/daemon part */
1184 ssl_ctx_srv = SSL_CTX_new(TLSv1_server_method());
1187 if (!SSL_CTX_use_certificate_file(ssl_ctx_srv, "/tmp/server.pem", SSL_FILETYPE_PEM)) {
1188 while ((error = ERR_get_error()))
1189 err("SSL: %s", ERR_error_string(error, NULL));
1190 errx("Failed to load certificate");
1192 if (!SSL_CTX_use_PrivateKey_file(ssl_ctx_srv, "/tmp/server.key", SSL_FILETYPE_PEM)) {
1193 while ((error = ERR_get_error()))
1194 err("SSL: %s", ERR_error_string(error, NULL));
1195 errx("Failed to load private key");
1198 return tlslistener(ssl_ctx_srv);