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 peer peers[MAX_PEERS];
57 static int peer_count = 0;
59 static struct replyq udp_server_replyq;
60 static int udp_server_sock = -1;
61 static char *udp_server_port = DEFAULT_UDP_PORT;
62 static pthread_mutex_t *ssl_locks;
63 static long *ssl_lock_count;
64 static SSL_CTX *ssl_ctx_cl;
68 /* callbacks for making OpenSSL thread safe */
69 unsigned long ssl_thread_id() {
70 return (unsigned long)pthread_self();
73 void ssl_locking_callback(int mode, int type, const char *file, int line) {
74 if (mode & CRYPTO_LOCK) {
75 pthread_mutex_lock(&ssl_locks[type]);
76 ssl_lock_count[type]++;
78 pthread_mutex_unlock(&ssl_locks[type]);
81 void ssl_locks_setup() {
84 ssl_locks = malloc(CRYPTO_num_locks() * sizeof(pthread_mutex_t));
85 ssl_lock_count = OPENSSL_malloc(CRYPTO_num_locks() * sizeof(long));
86 for (i = 0; i < CRYPTO_num_locks(); i++) {
87 ssl_lock_count[i] = 0;
88 pthread_mutex_init(&ssl_locks[i], NULL);
91 CRYPTO_set_id_callback(ssl_thread_id);
92 CRYPTO_set_locking_callback(ssl_locking_callback);
95 int resolvepeer(struct peer *peer) {
96 struct addrinfo hints;
98 pthread_mutex_lock(&peer->lock);
100 /* assume we should re-resolve */
101 freeaddrinfo(peer->addrinfo);
102 peer->addrinfo = NULL;
105 memset(&hints, 0, sizeof(hints));
106 hints.ai_socktype = (peer->type == 'T' ? SOCK_STREAM : SOCK_DGRAM);
107 hints.ai_family = AF_UNSPEC;
108 if (getaddrinfo(peer->host, peer->port, &hints, &peer->addrinfo)) {
109 err("resolvepeer: can't resolve %s port %s", peer->host, peer->port);
110 peer->addrinfo = NULL; /* probably don't need this */
111 pthread_mutex_unlock(&peer->lock);
114 pthread_mutex_unlock(&peer->lock);
118 int connecttopeer(struct peer *peer) {
120 struct addrinfo *res;
122 if (!peer->addrinfo) {
124 if (!peer->addrinfo) {
125 printf("connecttopeer: can't resolve %s into address to connect to\n", peer->host);
130 for (res = peer->addrinfo; res; res = res->ai_next) {
131 s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
133 err("connecttopeer: socket failed");
136 if (connect(s, res->ai_addr, res->ai_addrlen) == 0)
138 err("connecttopeer: connect failed");
145 /* returns the peer with matching address, or NULL */
146 /* if peer argument is not NULL, we only check that one peer */
147 struct peer *find_peer(char type, struct sockaddr *addr, struct peer *peer) {
148 struct sockaddr_in6 *sa6;
149 struct in_addr *a4 = NULL;
152 struct addrinfo *res;
154 if (addr->sa_family == AF_INET6) {
155 sa6 = (struct sockaddr_in6 *)addr;
156 if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr))
157 a4 = (struct in_addr *)&sa6->sin6_addr.s6_addr[12];
159 a4 = &((struct sockaddr_in *)addr)->sin_addr;
161 p = (peer ? peer : peers);
162 for (i = 0; i < peer_count; i++) {
164 for (res = p->addrinfo; res; res = res->ai_next)
165 if ((a4 && res->ai_family == AF_INET &&
166 !memcmp(a4, &((struct sockaddr_in *)res->ai_addr)->sin_addr, 4)) ||
167 (res->ai_family == AF_INET6 &&
168 !memcmp(&sa6->sin6_addr, &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 16)))
177 /* if *peer == NULL we return who we received from, else require it to be from peer */
178 /* return from in sa if not NULL */
179 unsigned char *radudpget(int s, struct peer **peer, struct sockaddr_storage *sa) {
182 unsigned char buf[65536], *rad;
183 struct sockaddr_storage from;
184 socklen_t fromlen = sizeof(from);
187 cnt = recvfrom(s, buf, sizeof(buf), 0, (struct sockaddr *)&from, &fromlen);
189 err("radudpget: recv failed");
192 printf("radudpget: got %d bytes from %s\n", cnt, addr2string((struct sockaddr *)&from, fromlen));
195 printf("radudpget: packet too small\n");
202 printf("radudpget: packet smaller than length field in radius header\n");
206 printf("radudpget: packet was padded with %d bytes\n", cnt - len);
208 f = find_peer('U', (struct sockaddr *)&from, *peer);
210 printf("radudpget: got packet from wrong or unknown UDP peer, ignoring\n");
217 err("radudpget: malloc failed");
219 memcpy(rad, buf, len);
220 *peer = f; /* only need this if *peer == NULL, but if not NULL *peer == f here */
226 void tlsconnect(struct peer *peer, struct timeval *when, char *text) {
231 pthread_mutex_lock(&peer->lock);
232 if (when && memcmp(&peer->lastconnecttry, when, sizeof(struct timeval))) {
233 /* already reconnected, nothing to do */
234 printf("tlsconnect: seems already reconnected\n");
235 pthread_mutex_unlock(&peer->lock);
239 printf("tlsconnect %s\n", text);
242 printf("tlsconnect: trying to open TLS connection to %s port %s\n", peer->host, peer->port);
243 gettimeofday(&now, NULL);
244 elapsed = now.tv_sec - peer->lastconnecttry.tv_sec;
245 memcpy(&peer->lastconnecttry, &now, sizeof(struct timeval));
246 if (peer->connectionok) {
247 peer->connectionok = 0;
249 } else if (elapsed < 5)
251 else if (elapsed < 600)
253 else if (elapsed < 10000) /* no sleep at startup */
255 if (peer->sockcl >= 0)
257 if ((peer->sockcl = connecttopeer(peer)) < 0)
259 SSL_free(peer->sslcl);
260 peer->sslcl = SSL_new(ssl_ctx_cl);
261 SSL_set_fd(peer->sslcl, peer->sockcl);
262 if (SSL_connect(peer->sslcl) > 0)
264 while ((error = ERR_get_error()))
265 err("tlsconnect: TLS: %s", ERR_error_string(error, NULL));
267 printf("tlsconnect: TLS connection to %s port %s up\n", peer->host, peer->port);
268 pthread_mutex_unlock(&peer->lock);
271 unsigned char *radtlsget(SSL *ssl) {
273 unsigned char buf[4], *rad;
276 for (total = 0; total < 4; total += cnt) {
277 cnt = SSL_read(ssl, buf + total, 4 - total);
279 printf("radtlsget: connection lost\n");
287 err("radtlsget: malloc failed");
292 for (; total < len; total += cnt) {
293 cnt = SSL_read(ssl, rad + total, len - total);
295 printf("radtlsget: connection lost\n");
305 printf("radtlsget: packet smaller than minimum radius size\n");
308 printf("radtlsget: got %d bytes\n", total);
312 int clientradput(struct peer *peer, unsigned char *rad) {
316 struct timeval lastconnecttry;
319 if (peer->type == 'U') {
320 if (send(peer->sockcl, rad, len, 0) >= 0) {
321 printf("clienradput: sent UDP of length %d to %s port %s\n", len, peer->host, peer->port);
324 err("clientradput: send failed");
328 lastconnecttry = peer->lastconnecttry;
329 while ((cnt = SSL_write(peer->sslcl, rad, len)) <= 0) {
330 while ((error = ERR_get_error()))
331 err("clientwr: TLS: %s", ERR_error_string(error, NULL));
332 tlsconnect(peer, &lastconnecttry, "clientradput");
333 lastconnecttry = peer->lastconnecttry;
336 peer->connectionok = 1;
337 printf("clientradput: Sent %d bytes, Radius packet of length %d to TLS peer %s\n",
338 cnt, len, peer->host);
342 int radsign(unsigned char *rad, unsigned char *sec) {
343 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
344 static unsigned char first = 1;
345 static EVP_MD_CTX mdctx;
349 pthread_mutex_lock(&lock);
351 EVP_MD_CTX_init(&mdctx);
355 result = (EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) &&
356 EVP_DigestUpdate(&mdctx, rad, RADLEN(rad)) &&
357 EVP_DigestUpdate(&mdctx, sec, strlen(sec)) &&
358 EVP_DigestFinal_ex(&mdctx, rad + 4, &md_len) &&
360 pthread_mutex_unlock(&lock);
364 int validauth(unsigned char *rad, unsigned char *reqauth, unsigned char *sec) {
365 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
366 static unsigned char first = 1;
367 static EVP_MD_CTX mdctx;
368 unsigned char hash[EVP_MAX_MD_SIZE];
372 pthread_mutex_lock(&lock);
374 EVP_MD_CTX_init(&mdctx);
380 result = (EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) &&
381 EVP_DigestUpdate(&mdctx, rad, 4) &&
382 EVP_DigestUpdate(&mdctx, reqauth, 16) &&
383 (len <= 20 || EVP_DigestUpdate(&mdctx, rad + 20, len - 20)) &&
384 EVP_DigestUpdate(&mdctx, sec, strlen(sec)) &&
385 EVP_DigestFinal_ex(&mdctx, hash, &len) &&
387 !memcmp(hash, rad + 4, 16));
388 pthread_mutex_unlock(&lock);
392 void sendrq(struct peer *to, struct peer *from, struct request *rq) {
395 pthread_mutex_lock(&to->newrq_mutex);
396 for (i = 0; i < MAX_REQUESTS; i++)
397 if (!to->requests[i].buf)
399 if (i == MAX_REQUESTS) {
400 printf("No room in queue, dropping request\n");
401 pthread_mutex_unlock(&to->newrq_mutex);
405 rq->buf[1] = (char)i;
406 to->requests[i] = *rq;
410 printf("signalling client writer\n");
411 pthread_cond_signal(&to->newrq_cond);
413 pthread_mutex_unlock(&to->newrq_mutex);
416 void sendreply(struct peer *to, struct peer *from, char *buf, struct sockaddr_storage *tosa) {
417 struct replyq *replyq = to->replyq;
419 pthread_mutex_lock(&replyq->count_mutex);
420 if (replyq->count == replyq->size) {
421 printf("No room in queue, dropping request\n");
422 pthread_mutex_unlock(&replyq->count_mutex);
426 replyq->replies[replyq->count].buf = buf;
428 replyq->replies[replyq->count].tosa = *tosa;
431 if (replyq->count == 1) {
432 printf("signalling client writer\n");
433 pthread_cond_signal(&replyq->count_cond);
435 pthread_mutex_unlock(&replyq->count_mutex);
438 int pwdcrypt(uint8_t *plain, uint8_t *enc, uint8_t enclen, uint8_t *shared, uint8_t sharedlen,
440 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
441 static unsigned char first = 1;
442 static EVP_MD_CTX mdctx;
443 unsigned char hash[EVP_MAX_MD_SIZE], *input;
445 uint8_t i, offset = 0;
447 pthread_mutex_lock(&lock);
449 EVP_MD_CTX_init(&mdctx);
455 if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) ||
456 !EVP_DigestUpdate(&mdctx, shared, sharedlen) ||
457 !EVP_DigestUpdate(&mdctx, input, 16) ||
458 !EVP_DigestFinal_ex(&mdctx, hash, &md_len) ||
460 pthread_mutex_unlock(&lock);
463 for (i = 0; i < 16; i++)
464 plain[offset + i] = hash[i] ^ enc[offset + i];
466 if (offset == enclen)
468 input = enc + offset - 16;
470 pthread_mutex_unlock(&lock);
474 struct peer *radsrv(struct request *rq, char *buf, struct peer *from) {
475 uint8_t code, id, *auth, *attr, *usernameattr = NULL, *userpwdattr = NULL, pwd[128], pwdlen;
480 unsigned char newauth[16];
483 code = *(uint8_t *)buf;
484 id = *(uint8_t *)(buf + 1);
486 auth = (uint8_t *)(buf + 4);
488 printf("radsrv: code %d, id %d, length %d\n", code, id, len);
490 if (code != RAD_Access_Request) {
491 printf("radsrv: server currently accepts only access-requests, ignoring\n");
499 left -= attr[RAD_Attr_Length];
501 printf("radsrv: attribute length exceeds packet length, ignoring packet\n");
504 switch (attr[RAD_Attr_Type]) {
505 case RAD_Attr_User_Name:
508 case RAD_Attr_User_Password:
512 attr += attr[RAD_Attr_Length];
515 printf("radsrv: malformed packet? remaining byte after last attribute\n");
518 printf("radsrv: Username: ");
519 for (i = 0; i < usernameattr[RAD_Attr_Length]; i++)
520 printf("%c", usernameattr[RAD_Attr_Value + i]);
524 /* find out where to send the packet, for now we send to first connected
525 TLS peer if UDP, and first UDP peer if TLS */
529 for (i = 0; i < peer_count; i++) {
530 for (realm = peers[i].realms; *realm; realm++) {
531 /* assume test@domain */
532 if (strlen(*realm) == usernameattr[RAD_Attr_Length] - 5 && !memcmp(usernameattr + 5, *realm, strlen(*realm))) {
533 printf("found matching realm: %s, host %s\n", *realm, peers[i].host);
539 switch (from->type) {
541 for (i = 0; i < peer_count; i++)
542 if (peers[i].type == 'T' && peers[i].sockcl >= 0)
546 for (i = 0; i < peer_count; i++)
547 if (peers[i].type == 'U')
553 if (i == peer_count) {
554 printf("radsrv: ignoring request, don't know where to send it\n");
560 if (!RAND_bytes(newauth, 16)) {
561 printf("radsrv: failed to generate random auth\n");
566 printf("radsrv: found userpwdattr of length %d\n", userpwdattr[RAD_Attr_Length]);
567 pwdlen = userpwdattr[RAD_Attr_Length] - 2;
568 if (pwdlen < 16 || pwdlen > 128 || pwdlen % 16) {
569 printf("radsrv: invalid user password length\n");
573 if (!pwdcrypt(pwd, &userpwdattr[RAD_Attr_Value], pwdlen, from->secret, strlen(from->secret), auth)) {
574 printf("radsrv: cannot decrypt password\n");
577 printf("radsrv: password: ");
578 for (i = 0; i < pwdlen; i++)
579 printf("%02x ", pwd[i]);
581 if (!pwdcrypt(&userpwdattr[RAD_Attr_Value], pwd, pwdlen, to->secret, strlen(to->secret), newauth)) {
582 printf("radsrv: cannot encrypt password\n");
590 memcpy(rq->origauth, auth, 16);
591 memcpy(rq->buf + 4, newauth, 16);
595 void *clientrd(void *arg) {
596 struct peer *from, *peer = (struct peer *)arg;
599 struct sockaddr_storage fromsa;
600 struct timeval lastconnecttry;
603 lastconnecttry = peer->lastconnecttry;
604 buf = (peer->type == 'U' ? radudpget(peer->sockcl, &peer, NULL) : radtlsget(peer->sslcl));
605 if (!buf && peer->type == 'T') {
606 tlsconnect(peer, &lastconnecttry, "clientrd");
610 peer->connectionok = 1;
612 i = buf[1]; /* i is the id */
614 pthread_mutex_lock(&peer->newrq_mutex);
615 if (!peer->requests[i].buf || !peer->requests[i].tries) {
616 pthread_mutex_unlock(&peer->newrq_mutex);
617 printf("clientrd: no matching request sent with this id, ignoring\n");
621 if (peer->requests[i].received) {
622 pthread_mutex_unlock(&peer->newrq_mutex);
623 printf("clientrd: already received, ignoring\n");
627 if (!validauth(buf, peer->requests[i].buf + 4, peer->secret)) {
628 pthread_mutex_unlock(&peer->newrq_mutex);
629 printf("clientrd: invalid auth, ignoring\n");
633 /* once we set received = 1, requests[i] may be reused */
634 buf[1] = (char)peer->requests[i].origid;
635 memcpy(buf + 4, peer->requests[i].origauth, 16);
636 from = peer->requests[i].from;
637 if (from->type == 'U')
638 fromsa = peer->requests[i].fromsa;
639 peer->requests[i].received = 1;
640 pthread_mutex_unlock(&peer->newrq_mutex);
642 if (!radsign(buf, from->secret)) {
643 printf("clientrd: failed to sign message\n");
647 printf("clientrd: giving packet back to where it came from\n");
648 sendreply(from, peer, buf, from->type == 'U' ? &fromsa : NULL);
652 void *clientwr(void *arg) {
653 struct peer *peer = (struct peer *)arg;
654 pthread_t clientrdth;
657 if (peer->type == 'U') {
658 if ((peer->sockcl = connecttopeer(peer)) < 0) {
659 printf("clientwr: connecttopeer failed\n");
663 tlsconnect(peer, NULL, "new client");
665 if (pthread_create(&clientrdth, NULL, clientrd, (void *)peer))
666 errx("clientwr: pthread_create failed");
669 pthread_mutex_lock(&peer->newrq_mutex);
670 while (!peer->newrq) {
671 printf("clientwr: waiting for signal\n");
672 pthread_cond_wait(&peer->newrq_cond, &peer->newrq_mutex);
673 printf("clientwr: got signal\n");
676 pthread_mutex_unlock(&peer->newrq_mutex);
678 for (i = 0; i < MAX_REQUESTS; i++) {
679 pthread_mutex_lock(&peer->newrq_mutex);
680 while (!peer->requests[i].buf && i < MAX_REQUESTS)
682 if (i == MAX_REQUESTS) {
683 pthread_mutex_unlock(&peer->newrq_mutex);
687 /* already received or too many tries */
688 if (peer->requests[i].received || peer->requests[i].tries > 2) {
689 free(peer->requests[i].buf);
690 /* setting this to NULL means that it can be reused */
691 peer->requests[i].buf = NULL;
692 pthread_mutex_unlock(&peer->newrq_mutex);
695 pthread_mutex_unlock(&peer->newrq_mutex);
697 peer->requests[i].tries++;
698 clientradput(peer, peer->requests[i].buf);
701 /* should do more work to maintain TLS connections, keepalives etc */
704 void *udpserverwr(void *arg) {
705 struct replyq *replyq = &udp_server_replyq;
706 struct reply *reply = replyq->replies;
708 pthread_mutex_lock(&replyq->count_mutex);
710 while (!replyq->count) {
711 printf("udp server writer, waiting for signal\n");
712 pthread_cond_wait(&replyq->count_cond, &replyq->count_mutex);
713 printf("udp server writer, got signal\n");
715 pthread_mutex_unlock(&replyq->count_mutex);
717 if (sendto(udp_server_sock, reply->buf, RADLEN(reply->buf), 0,
718 (struct sockaddr *)&reply->tosa, SOCKADDR_SIZE(reply->tosa)) < 0)
719 err("sendudp: send failed");
722 pthread_mutex_lock(&replyq->count_mutex);
724 memmove(replyq->replies, replyq->replies + 1,
725 replyq->count * sizeof(struct reply));
729 void *udpserverrd(void *arg) {
732 struct peer *to, *fr;
733 pthread_t udpserverwrth;
735 if ((udp_server_sock = bindport(SOCK_DGRAM, udp_server_port)) < 0) {
736 printf("udpserverrd: socket/bind failed\n");
739 printf("udpserverrd: listening on UDP port %s\n", udp_server_port);
741 if (pthread_create(&udpserverwrth, NULL, udpserverwr, NULL))
742 errx("pthread_create failed");
746 memset(&rq, 0, sizeof(struct request));
747 buf = radudpget(udp_server_sock, &fr, &rq.fromsa);
748 to = radsrv(&rq, buf, fr);
750 printf("udpserverrd: ignoring request, no place to send it\n");
757 void *tlsserverwr(void *arg) {
760 struct peer *peer = (struct peer *)arg;
761 struct replyq *replyq;
763 pthread_mutex_lock(&peer->replycount_mutex);
765 replyq = peer->replyq;
766 while (!replyq->count) {
767 printf("tls server writer, waiting for signal\n");
768 pthread_cond_wait(&replyq->count_cond, &replyq->count_mutex);
769 printf("tls server writer, got signal\n");
771 pthread_mutex_unlock(&replyq->count_mutex);
772 cnt = SSL_write(peer->sslsrv, replyq->replies->buf, RADLEN(replyq->replies->buf));
774 printf("tlsserverwr: Sent %d bytes, Radius packet of length %d\n",
775 cnt, RADLEN(replyq->replies->buf));
777 while ((error = ERR_get_error()))
778 err("tlsserverwr: SSL: %s", ERR_error_string(error, NULL));
779 free(replyq->replies->buf);
781 pthread_mutex_lock(&replyq->count_mutex);
783 memmove(replyq->replies, replyq->replies + 1, replyq->count * sizeof(struct reply));
787 void *tlsserverrd(void *arg) {
793 struct peer *peer = (struct peer *)arg;
794 pthread_t tlsserverwrth;
796 printf("tlsserverrd starting\n");
797 if (SSL_accept(peer->sslsrv) <= 0) {
798 while ((error = ERR_get_error()))
799 err("tlsserverrd: SSL: %s", ERR_error_string(error, NULL));
800 errx("accept failed, child exiting");
803 if (pthread_create(&tlsserverwrth, NULL, tlsserverwr, (void *)peer))
804 errx("pthread_create failed");
807 buf = radtlsget(peer->sslsrv);
809 printf("tlsserverrd: connection lost\n");
810 s = SSL_get_fd(peer->sslsrv);
811 SSL_free(peer->sslsrv);
817 printf("tlsserverrd: got Radius message from %s\n", peer->host);
818 memset(&rq, 0, sizeof(struct request));
819 to = radsrv(&rq, buf, peer);
821 printf("ignoring request, no place to send it\n");
824 sendrq(to, peer, &rq);
828 int tlslistener(SSL_CTX *ssl_ctx) {
829 pthread_t tlsserverth;
831 struct sockaddr_storage from;
832 size_t fromlen = sizeof(from);
835 if ((s = bindport(SOCK_STREAM, DEFAULT_TLS_PORT)) < 0) {
836 printf("tlslistener: socket/bind failed\n");
841 printf("listening for incoming TLS on port %s\n", DEFAULT_TLS_PORT);
844 snew = accept(s, (struct sockaddr *)&from, &fromlen);
846 errx("accept failed");
847 printf("incoming TLS connection from %s\n", addr2string((struct sockaddr *)&from, fromlen));
849 peer = find_peer('T', (struct sockaddr *)&from, NULL);
851 printf("ignoring request, not a known TLS peer\n");
857 printf("Ignoring incoming connection, already have one from this peer\n");
861 peer->sslsrv = SSL_new(ssl_ctx);
862 SSL_set_fd(peer->sslsrv, snew);
863 if (pthread_create(&tlsserverth, NULL, tlsserverrd, (void *)peer))
864 errx("pthread_create failed");
869 char *parsehostport(char *s, struct peer *peer) {
874 // allow literal addresses and port, e.g. [2001:db8::1]:1812
878 for (; *p && *p != ']' && *p != ' ' && *p != '\t' && *p != '\n'; p++);
880 printf("no ] matching initial [\n");
886 for (; *p && *p != ':' && *p != ' ' && *p != '\t' && *p != '\n'; p++);
889 printf("missing host/address\n");
892 peer->host = malloc(p - field + 1);
894 errx("malloc failed");
895 memcpy(peer->host, field, p - field);
896 peer->host[p - field] = '\0';
899 if (*p && *p != ':' && *p != ' ' && *p != '\t' && *p != '\n') {
900 printf("unexpected character after ]\n");
905 /* port number or service name is specified */;
907 for (; *p && *p != ' ' && *p != '\t' && *p != '\n'; p++);
909 printf("syntax error, : but no following port\n");
912 peer->port = malloc(p - field + 1);
914 errx("malloc failed");
915 memcpy(peer->port, field, p - field);
916 peer->port[p - field] = '\0';
922 // * is default, else longest match ... ";" used for separator
923 char *parserealmlist(char *s, struct peer *peer) {
927 for (p = s, n = 1; *p && *p != ' ' && *p != '\t' && *p != '\n'; p++)
935 peer->realmdata = malloc(l + 1);
936 if (!peer->realmdata)
937 errx("malloc failed");
938 memcpy(peer->realmdata, s, l);
939 peer->realmdata[l] = '\0';
940 peer->realms = malloc((1+n) * sizeof(char *));
942 errx("malloc failed");
943 peer->realms[0] = peer->realmdata;
944 for (n = 1, i = 0; i < l; i++)
945 if (peer->realmdata[i] == ';') {
946 peer->realmdata[i] = '\0';
947 peer->realms[n++] = peer->realmdata + i + 1;
949 peer->realms[n] = NULL;
953 void getconfig(const char *filename) {
956 char *p, *field, **r;
961 udp_server_replyq.replies = malloc(4 * MAX_REQUESTS * sizeof(struct reply));
962 if (!udp_server_replyq.replies)
963 errx("malloc failed");
964 udp_server_replyq.size = 4 * MAX_REQUESTS;
965 udp_server_replyq.count = 0;
966 pthread_mutex_init(&udp_server_replyq.count_mutex, NULL);
967 pthread_cond_init(&udp_server_replyq.count_cond, NULL);
969 f = fopen(filename, "r");
971 errx("getconfig failed to open %s for reading", filename);
973 while (fgets(line, 1024, f) && peer_count < MAX_PEERS) {
974 peer = &peers[peer_count];
975 memset(peer, 0, sizeof(struct peer));
977 for (p = line; *p == ' ' || *p == '\t'; p++);
978 if (*p == '#' || *p == '\n')
980 if (*p != 'U' && *p != 'T') {
981 printf("server type must be U or T, got %c\n", *p);
985 for (p++; *p == ' ' || *p == '\t'; p++);
986 p = parsehostport(p, peer);
988 peer->port = (peer->type == 'U' ? DEFAULT_UDP_PORT : DEFAULT_TLS_PORT);
989 for (; *p == ' ' || *p == '\t'; p++);
990 p = parserealmlist(p, peer);
992 printf("realm list must be specified\n");
995 for (; *p == ' ' || *p == '\t'; p++);
997 for (; *p && *p != ' ' && *p != '\t' && *p != '\n'; p++);
999 /* no secret set and end of line, line is complete if TLS */
1000 if (peer->type == 'U') {
1001 printf("secret must be specified for UDP\n");
1004 peer->secret = DEFAULT_TLS_SECRET;
1006 peer->secret = malloc(p - field + 1);
1008 errx("malloc failed");
1009 memcpy(peer->secret, field, p - field);
1010 peer->secret[p - field] = '\0';
1011 /* check that rest of line only white space */
1012 for (; *p == ' ' || *p == '\t'; p++);
1013 if (*p && *p != '\n') {
1014 printf("max 4 fields per line, found a 5th\n");
1019 pthread_mutex_init(&peer->lock, NULL);
1020 if (!resolvepeer(peer)) {
1021 printf("failed to resolve host %s port %s, exiting\n", peer->host, peer->port);
1024 peer->requests = malloc(MAX_REQUESTS * sizeof(struct request));
1025 if (!peer->requests)
1026 errx("malloc failed");
1027 memset(peer->requests, 0, MAX_REQUESTS * sizeof(struct request));
1029 pthread_mutex_init(&peer->newrq_mutex, NULL);
1030 pthread_cond_init(&peer->newrq_cond, NULL);
1032 if (peer->type == 'U')
1033 peer->replyq = &udp_server_replyq;
1035 peer->replyq = malloc(sizeof(struct replyq));
1037 errx("malloc failed");
1038 peer->replyq->replies = malloc(MAX_REQUESTS * sizeof(struct reply));
1039 if (!peer->replyq->replies)
1040 errx("malloc failed");
1041 peer->replyq->size = MAX_REQUESTS;
1042 peer->replyq->count = 0;
1043 pthread_mutex_init(&peer->replyq->count_mutex, NULL);
1044 pthread_cond_init(&peer->replyq->count_cond, NULL);
1046 printf("got type %c, host %s, port %s, secret %s\n", peers[peer_count].type,
1047 peers[peer_count].host, peers[peer_count].port, peers[peer_count].secret);
1048 printf(" with realms:");
1049 for (r = peer->realms; *r; r++)
1057 void parseargs(int argc, char **argv) {
1060 while ((c = getopt(argc, argv, "p:")) != -1) {
1063 udp_server_port = optarg;
1073 printf("radsecproxy [ -p UDP-port ]\n");
1077 int main(int argc, char **argv) {
1078 SSL_CTX *ssl_ctx_srv;
1079 unsigned long error;
1080 pthread_t udpserverth;
1081 pthread_attr_t joinable;
1084 parseargs(argc, argv);
1085 getconfig("radsecproxy.conf");
1089 pthread_attr_init(&joinable);
1090 pthread_attr_setdetachstate(&joinable, PTHREAD_CREATE_JOINABLE);
1092 /* listen on UDP if at least one UDP peer */
1094 for (i = 0; i < peer_count; i++)
1095 if (peers[i].type == 'U') {
1096 if (pthread_create(&udpserverth, &joinable, udpserverrd, NULL))
1097 errx("pthread_create failed");
1101 for (i = 0; i < peer_count; i++)
1102 if (peers[i].type == 'T')
1105 if (i == peer_count) {
1106 printf("No TLS peers defined, just doing UDP proxying\n");
1107 /* just hang around doing nothing, anything to do here? */
1108 pthread_join(udpserverth, NULL);
1113 SSL_load_error_strings();
1116 while (!RAND_status()) {
1117 time_t t = time(NULL);
1118 pid_t pid = getpid();
1119 RAND_seed((unsigned char *)&t, sizeof(time_t));
1120 RAND_seed((unsigned char *)&pid, sizeof(pid));
1123 /* initialise client part and start clients */
1124 ssl_ctx_cl = SSL_CTX_new(TLSv1_client_method());
1128 for (i = 0; i < peer_count; i++) {
1129 if (pthread_create(&peers[i].clientth, NULL, clientwr, (void *)&peers[i]))
1130 errx("pthread_create failed");
1133 /* setting up server/daemon part */
1134 ssl_ctx_srv = SSL_CTX_new(TLSv1_server_method());
1137 if (!SSL_CTX_use_certificate_file(ssl_ctx_srv, "/tmp/server.pem", SSL_FILETYPE_PEM)) {
1138 while ((error = ERR_get_error()))
1139 err("SSL: %s", ERR_error_string(error, NULL));
1140 errx("Failed to load certificate");
1142 if (!SSL_CTX_use_PrivateKey_file(ssl_ctx_srv, "/tmp/server.key", SSL_FILETYPE_PEM)) {
1143 while ((error = ERR_get_error()))
1144 err("SSL: %s", ERR_error_string(error, NULL));
1145 errx("Failed to load private key");
1147 return tlslistener(ssl_ctx_srv);