2 * Copyright (C) 2006, 2007 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.
9 /* For UDP there is one server instance consisting of udpserverrd and udpserverth
10 * rd is responsible for init and launching wr
11 * For TLS there is a server instance that launches tlsserverrd for each TLS peer
12 * each tlsserverrd launches tlsserverwr
13 * For each UDP/TLS peer there is clientrd and clientwr, clientwr is responsible
14 * for init and launching rd
16 * serverrd will receive a request, processes it and puts it in the requestq of
17 * the appropriate clientwr
18 * clientwr monitors its requestq and sends requests
19 * clientrd looks for responses, processes them and puts them in the replyq of
20 * the peer the request came from
21 * serverwr monitors its reply and sends replies
23 * In addition to the main thread, we have:
24 * If UDP peers are configured, there will be 2 + 2 * #peers UDP threads
25 * If TLS peers are configured, there will initially be 2 * #peers TLS threads
26 * For each TLS peer connecting to us there will be 2 more TLS threads
27 * This is only for connected peers
28 * Example: With 3 UDP peer and 30 TLS peers, there will be a max of
29 * 1 + (2 + 2 * 3) + (2 * 30) + (2 * 30) = 129 threads
32 #include <sys/socket.h>
33 #include <netinet/in.h>
41 #include <openssl/ssl.h>
42 #include <openssl/rand.h>
43 #include <openssl/err.h>
44 #include <openssl/md5.h>
45 #include <openssl/hmac.h>
47 #include "radsecproxy.h"
49 static struct options options;
50 static struct client *clients = NULL;
51 static struct server *servers = NULL;
52 static struct realm *realms = NULL;
54 static int client_udp_count = 0;
55 static int client_tls_count = 0;
56 static int client_count = 0;
57 static int server_udp_count = 0;
58 static int server_tls_count = 0;
59 static int server_count = 0;
60 static int realm_count = 0;
62 static struct peer *tcp_server_listen;
63 static struct peer *udp_server_listen;
64 static struct replyq udp_server_replyq;
65 static int udp_server_sock = -1;
66 static pthread_mutex_t *ssl_locks;
67 static long *ssl_lock_count;
68 static SSL_CTX *ssl_ctx = NULL;
72 /* callbacks for making OpenSSL thread safe */
73 unsigned long ssl_thread_id() {
74 return (unsigned long)pthread_self();
77 void ssl_locking_callback(int mode, int type, const char *file, int line) {
78 if (mode & CRYPTO_LOCK) {
79 pthread_mutex_lock(&ssl_locks[type]);
80 ssl_lock_count[type]++;
82 pthread_mutex_unlock(&ssl_locks[type]);
85 static int pem_passwd_cb(char *buf, int size, int rwflag, void *userdata) {
86 int pwdlen = strlen(userdata);
87 if (rwflag != 0 || pwdlen > size) /* not for decryption or too large */
89 memcpy(buf, userdata, pwdlen);
93 static int verify_cb(int ok, X509_STORE_CTX *ctx) {
98 err_cert = X509_STORE_CTX_get_current_cert(ctx);
99 err = X509_STORE_CTX_get_error(ctx);
100 depth = X509_STORE_CTX_get_error_depth(ctx);
102 if (depth > MAX_CERT_DEPTH) {
104 err = X509_V_ERR_CERT_CHAIN_TOO_LONG;
105 X509_STORE_CTX_set_error(ctx, err);
109 X509_NAME_oneline(X509_get_subject_name(err_cert), buf, 256);
110 debug(DBG_WARN, "verify error: num=%d:%s:depth=%d:%s", err, X509_verify_cert_error_string(err), depth, buf);
113 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
114 X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert), buf, 256);
115 debug(DBG_WARN, "\tIssuer=%s", buf);
117 case X509_V_ERR_CERT_NOT_YET_VALID:
118 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
119 debug(DBG_WARN, "\tCertificate not yet valid");
121 case X509_V_ERR_CERT_HAS_EXPIRED:
122 debug(DBG_WARN, "Certificate has expired");
124 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
125 debug(DBG_WARN, "Certificate no longer valid (after notAfter)");
130 printf("certificate verify returns %d\n", ok);
135 SSL_CTX *ssl_init() {
140 if (!options.tlscertificatefile || !options.tlscertificatekeyfile)
141 debugx(1, DBG_ERR, "TLSCertificateFile and TLSCertificateKeyFile must be specified for TLS");
143 if (!options.tlscacertificatefile && !options.tlscacertificatepath)
144 debugx(1, DBG_ERR, "CA Certificate file/path need to be configured");
146 ssl_locks = malloc(CRYPTO_num_locks() * sizeof(pthread_mutex_t));
147 ssl_lock_count = OPENSSL_malloc(CRYPTO_num_locks() * sizeof(long));
148 for (i = 0; i < CRYPTO_num_locks(); i++) {
149 ssl_lock_count[i] = 0;
150 pthread_mutex_init(&ssl_locks[i], NULL);
152 CRYPTO_set_id_callback(ssl_thread_id);
153 CRYPTO_set_locking_callback(ssl_locking_callback);
155 SSL_load_error_strings();
158 while (!RAND_status()) {
159 time_t t = time(NULL);
160 pid_t pid = getpid();
161 RAND_seed((unsigned char *)&t, sizeof(time_t));
162 RAND_seed((unsigned char *)&pid, sizeof(pid));
165 ctx = SSL_CTX_new(TLSv1_method());
166 if (options.tlscertificatekeypassword) {
167 SSL_CTX_set_default_passwd_cb_userdata(ctx, options.tlscertificatekeypassword);
168 SSL_CTX_set_default_passwd_cb(ctx, pem_passwd_cb);
170 if (SSL_CTX_use_certificate_chain_file(ctx, options.tlscertificatefile) &&
171 SSL_CTX_use_PrivateKey_file(ctx, options.tlscertificatekeyfile, SSL_FILETYPE_PEM) &&
172 SSL_CTX_check_private_key(ctx) &&
173 SSL_CTX_load_verify_locations(ctx, options.tlscacertificatefile, options.tlscacertificatepath)) {
174 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, verify_cb);
175 SSL_CTX_set_verify_depth(ctx, MAX_CERT_DEPTH + 1);
179 while ((error = ERR_get_error()))
180 debug(DBG_ERR, "SSL: %s", ERR_error_string(error, NULL));
181 debug(DBG_ERR, "Error initialising SSL/TLS");
186 void printauth(char *s, unsigned char *t) {
189 for (i = 0; i < 16; i++)
190 printf("%02x ", t[i]);
195 int resolvepeer(struct peer *peer, int ai_flags) {
196 struct addrinfo hints, *addrinfo;
198 memset(&hints, 0, sizeof(hints));
199 hints.ai_socktype = (peer->type == 'T' ? SOCK_STREAM : SOCK_DGRAM);
200 hints.ai_family = AF_UNSPEC;
201 hints.ai_flags = ai_flags;
202 if (getaddrinfo(peer->host, peer->port, &hints, &addrinfo)) {
203 debug(DBG_WARN, "resolvepeer: can't resolve %s port %s", peer->host, peer->port);
208 freeaddrinfo(peer->addrinfo);
209 peer->addrinfo = addrinfo;
213 int connecttoserver(struct addrinfo *addrinfo) {
215 struct addrinfo *res;
218 for (res = addrinfo; res; res = res->ai_next) {
219 s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
221 debug(DBG_WARN, "connecttoserver: socket failed");
224 if (connect(s, res->ai_addr, res->ai_addrlen) == 0)
226 debug(DBG_WARN, "connecttoserver: connect failed");
233 int bindtoaddr(struct addrinfo *addrinfo) {
235 struct addrinfo *res;
237 for (res = addrinfo; res; res = res->ai_next) {
238 s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
240 debug(DBG_WARN, "bindtoaddr: socket failed");
243 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
244 if (!bind(s, res->ai_addr, res->ai_addrlen))
246 debug(DBG_WARN, "bindtoaddr: bind failed");
252 /* returns the client with matching address, or NULL */
253 /* if client argument is not NULL, we only check that one client */
254 struct client *find_client(char type, struct sockaddr *addr, struct client *client) {
255 struct sockaddr_in6 *sa6 = NULL;
256 struct in_addr *a4 = NULL;
259 struct addrinfo *res;
261 if (addr->sa_family == AF_INET6) {
262 sa6 = (struct sockaddr_in6 *)addr;
263 if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr))
264 a4 = (struct in_addr *)&sa6->sin6_addr.s6_addr[12];
266 a4 = &((struct sockaddr_in *)addr)->sin_addr;
268 c = (client ? client : clients);
269 for (i = 0; i < client_count; i++) {
270 if (c->peer.type == type)
271 for (res = c->peer.addrinfo; res; res = res->ai_next)
272 if ((a4 && res->ai_family == AF_INET &&
273 !memcmp(a4, &((struct sockaddr_in *)res->ai_addr)->sin_addr, 4)) ||
274 (res->ai_family == AF_INET6 &&
275 !memcmp(&sa6->sin6_addr, &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 16)))
284 /* returns the server with matching address, or NULL */
285 /* if server argument is not NULL, we only check that one server */
286 struct server *find_server(char type, struct sockaddr *addr, struct server *server) {
287 struct sockaddr_in6 *sa6 = NULL;
288 struct in_addr *a4 = NULL;
291 struct addrinfo *res;
293 if (addr->sa_family == AF_INET6) {
294 sa6 = (struct sockaddr_in6 *)addr;
295 if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr))
296 a4 = (struct in_addr *)&sa6->sin6_addr.s6_addr[12];
298 a4 = &((struct sockaddr_in *)addr)->sin_addr;
300 s = (server ? server : servers);
301 for (i = 0; i < server_count; i++) {
302 if (s->peer.type == type)
303 for (res = s->peer.addrinfo; res; res = res->ai_next)
304 if ((a4 && res->ai_family == AF_INET &&
305 !memcmp(a4, &((struct sockaddr_in *)res->ai_addr)->sin_addr, 4)) ||
306 (res->ai_family == AF_INET6 &&
307 !memcmp(&sa6->sin6_addr, &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 16)))
316 /* exactly one of client and server must be non-NULL */
317 /* if *peer == NULL we return who we received from, else require it to be from peer */
318 /* return from in sa if not NULL */
319 unsigned char *radudpget(int s, struct client **client, struct server **server, struct sockaddr_storage *sa) {
322 unsigned char buf[65536], *rad;
323 struct sockaddr_storage from;
324 socklen_t fromlen = sizeof(from);
327 cnt = recvfrom(s, buf, sizeof(buf), 0, (struct sockaddr *)&from, &fromlen);
329 debug(DBG_WARN, "radudpget: recv failed");
332 debug(DBG_DBG, "radudpget: got %d bytes from %s", cnt, addr2string((struct sockaddr *)&from, fromlen));
335 debug(DBG_WARN, "radudpget: packet too small");
341 debug(DBG_WARN, "radudpget: length too small");
346 debug(DBG_WARN, "radudpget: packet smaller than length field in radius header");
350 debug(DBG_DBG, "radudpget: packet was padded with %d bytes", cnt - len);
353 ? (void *)find_client('U', (struct sockaddr *)&from, *client)
354 : (void *)find_server('U', (struct sockaddr *)&from, *server));
356 debug(DBG_WARN, "radudpget: got packet from wrong or unknown UDP peer, ignoring");
363 debug(DBG_ERR, "radudpget: malloc failed");
365 memcpy(rad, buf, len);
367 *client = (struct client *)f; /* only need this if *client == NULL, but if not NULL *client == f here */
369 *server = (struct server *)f; /* only need this if *server == NULL, but if not NULL *server == f here */
375 int tlsverifycert(struct peer *peer) {
383 if (SSL_get_verify_result(peer->ssl) != X509_V_OK) {
384 debug(DBG_ERR, "tlsverifycert: basic validation failed");
385 while ((error = ERR_get_error()))
386 debug(DBG_ERR, "tlsverifycert: TLS: %s", ERR_error_string(error, NULL));
390 cert = SSL_get_peer_certificate(peer->ssl);
392 debug(DBG_ERR, "tlsverifycert: failed to obtain certificate");
395 nm = X509_get_subject_name(cert);
398 loc = X509_NAME_get_index_by_NID(nm, NID_commonName, loc);
401 e = X509_NAME_get_entry(nm, loc);
402 l = ASN1_STRING_to_UTF8(&v, X509_NAME_ENTRY_get_data(e));
409 for (i = 0; i < l; i++)
414 if (l == strlen(peer->host) && !strncasecmp(peer->host, (char *)v, l)) {
415 debug(DBG_DBG, "tlsverifycert: Found cn matching host %s, All OK", peer->host);
418 debug(DBG_ERR, "tlsverifycert: cn not matching host %s", peer->host);
424 void tlsconnect(struct server *server, struct timeval *when, char *text) {
428 debug(DBG_DBG, "tlsconnect called from %s", text);
429 pthread_mutex_lock(&server->lock);
430 if (when && memcmp(&server->lastconnecttry, when, sizeof(struct timeval))) {
431 /* already reconnected, nothing to do */
432 debug(DBG_DBG, "tlsconnect(%s): seems already reconnected", text);
433 pthread_mutex_unlock(&server->lock);
437 debug(DBG_DBG, "tlsconnect %s", text);
440 gettimeofday(&now, NULL);
441 elapsed = now.tv_sec - server->lastconnecttry.tv_sec;
442 if (server->connectionok) {
443 server->connectionok = 0;
445 } else if (elapsed < 5)
447 else if (elapsed < 300) {
448 debug(DBG_INFO, "tlsconnect: sleeping %lds", elapsed);
450 } else if (elapsed < 100000) {
451 debug(DBG_INFO, "tlsconnect: sleeping %ds", 600);
454 server->lastconnecttry.tv_sec = now.tv_sec; /* no sleep at startup */
455 debug(DBG_WARN, "tlsconnect: trying to open TLS connection to %s port %s", server->peer.host, server->peer.port);
456 if (server->sock >= 0)
458 if ((server->sock = connecttoserver(server->peer.addrinfo)) < 0) {
459 debug(DBG_ERR, "tlsconnect: connecttoserver failed");
463 SSL_free(server->peer.ssl);
464 server->peer.ssl = SSL_new(ssl_ctx);
465 SSL_set_fd(server->peer.ssl, server->sock);
466 if (SSL_connect(server->peer.ssl) > 0 && tlsverifycert(&server->peer))
469 debug(DBG_WARN, "tlsconnect: TLS connection to %s port %s up", server->peer.host, server->peer.port);
470 gettimeofday(&server->lastconnecttry, NULL);
471 pthread_mutex_unlock(&server->lock);
474 unsigned char *radtlsget(SSL *ssl) {
476 unsigned char buf[4], *rad;
479 for (total = 0; total < 4; total += cnt) {
480 cnt = SSL_read(ssl, buf + total, 4 - total);
482 debug(DBG_ERR, "radtlsget: connection lost");
483 if (SSL_get_error(ssl, cnt) == SSL_ERROR_ZERO_RETURN) {
484 /* remote end sent close_notify, send one back */
494 debug(DBG_ERR, "radtlsget: malloc failed");
499 for (; total < len; total += cnt) {
500 cnt = SSL_read(ssl, rad + total, len - total);
502 debug(DBG_ERR, "radtlsget: connection lost");
503 if (SSL_get_error(ssl, cnt) == SSL_ERROR_ZERO_RETURN) {
504 /* remote end sent close_notify, send one back */
516 debug(DBG_WARN, "radtlsget: packet smaller than minimum radius size");
519 debug(DBG_DBG, "radtlsget: got %d bytes", total);
523 int clientradput(struct server *server, unsigned char *rad) {
527 struct timeval lastconnecttry;
530 if (server->peer.type == 'U') {
531 if (send(server->sock, rad, len, 0) >= 0) {
532 debug(DBG_DBG, "clienradput: sent UDP of length %d to %s port %s", len, server->peer.host, server->peer.port);
535 debug(DBG_WARN, "clientradput: send failed");
539 lastconnecttry = server->lastconnecttry;
540 while ((cnt = SSL_write(server->peer.ssl, rad, len)) <= 0) {
541 while ((error = ERR_get_error()))
542 debug(DBG_ERR, "clientradput: TLS: %s", ERR_error_string(error, NULL));
543 tlsconnect(server, &lastconnecttry, "clientradput");
544 lastconnecttry = server->lastconnecttry;
547 server->connectionok = 1;
548 debug(DBG_DBG, "clientradput: Sent %d bytes, Radius packet of length %d to TLS peer %s",
549 cnt, len, server->peer.host);
553 int radsign(unsigned char *rad, unsigned char *sec) {
554 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
555 static unsigned char first = 1;
556 static EVP_MD_CTX mdctx;
560 pthread_mutex_lock(&lock);
562 EVP_MD_CTX_init(&mdctx);
566 result = (EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) &&
567 EVP_DigestUpdate(&mdctx, rad, RADLEN(rad)) &&
568 EVP_DigestUpdate(&mdctx, sec, strlen((char *)sec)) &&
569 EVP_DigestFinal_ex(&mdctx, rad + 4, &md_len) &&
571 pthread_mutex_unlock(&lock);
575 int validauth(unsigned char *rad, unsigned char *reqauth, unsigned char *sec) {
576 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
577 static unsigned char first = 1;
578 static EVP_MD_CTX mdctx;
579 unsigned char hash[EVP_MAX_MD_SIZE];
583 pthread_mutex_lock(&lock);
585 EVP_MD_CTX_init(&mdctx);
591 result = (EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) &&
592 EVP_DigestUpdate(&mdctx, rad, 4) &&
593 EVP_DigestUpdate(&mdctx, reqauth, 16) &&
594 (len <= 20 || EVP_DigestUpdate(&mdctx, rad + 20, len - 20)) &&
595 EVP_DigestUpdate(&mdctx, sec, strlen((char *)sec)) &&
596 EVP_DigestFinal_ex(&mdctx, hash, &len) &&
598 !memcmp(hash, rad + 4, 16));
599 pthread_mutex_unlock(&lock);
603 int checkmessageauth(unsigned char *rad, uint8_t *authattr, char *secret) {
604 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
605 static unsigned char first = 1;
606 static HMAC_CTX hmacctx;
608 uint8_t auth[16], hash[EVP_MAX_MD_SIZE];
610 pthread_mutex_lock(&lock);
612 HMAC_CTX_init(&hmacctx);
616 memcpy(auth, authattr, 16);
617 memset(authattr, 0, 16);
619 HMAC_Init_ex(&hmacctx, secret, strlen(secret), EVP_md5(), NULL);
620 HMAC_Update(&hmacctx, rad, RADLEN(rad));
621 HMAC_Final(&hmacctx, hash, &md_len);
622 memcpy(authattr, auth, 16);
624 debug(DBG_WARN, "message auth computation failed");
625 pthread_mutex_unlock(&lock);
629 if (memcmp(auth, hash, 16)) {
630 debug(DBG_WARN, "message authenticator, wrong value");
631 pthread_mutex_unlock(&lock);
635 pthread_mutex_unlock(&lock);
639 int createmessageauth(unsigned char *rad, unsigned char *authattrval, char *secret) {
640 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
641 static unsigned char first = 1;
642 static HMAC_CTX hmacctx;
648 pthread_mutex_lock(&lock);
650 HMAC_CTX_init(&hmacctx);
654 memset(authattrval, 0, 16);
656 HMAC_Init_ex(&hmacctx, secret, strlen(secret), EVP_md5(), NULL);
657 HMAC_Update(&hmacctx, rad, RADLEN(rad));
658 HMAC_Final(&hmacctx, authattrval, &md_len);
660 debug(DBG_WARN, "message auth computation failed");
661 pthread_mutex_unlock(&lock);
665 pthread_mutex_unlock(&lock);
669 unsigned char *attrget(unsigned char *attrs, int length, uint8_t type) {
671 if (ATTRTYPE(attrs) == type)
673 length -= ATTRLEN(attrs);
674 attrs += ATTRLEN(attrs);
679 void sendrq(struct server *to, struct request *rq) {
683 pthread_mutex_lock(&to->newrq_mutex);
684 /* might simplify if only try nextid, might be ok */
685 for (i = to->nextid; i < MAX_REQUESTS; i++)
686 if (!to->requests[i].buf)
688 if (i == MAX_REQUESTS) {
689 for (i = 0; i < to->nextid; i++)
690 if (!to->requests[i].buf)
692 if (i == to->nextid) {
693 debug(DBG_WARN, "No room in queue, dropping request");
695 pthread_mutex_unlock(&to->newrq_mutex);
700 rq->buf[1] = (char)i;
702 attr = attrget(rq->buf + 20, RADLEN(rq->buf) - 20, RAD_Attr_Message_Authenticator);
703 if (attr && !createmessageauth(rq->buf, ATTRVAL(attr), to->peer.secret)) {
705 pthread_mutex_unlock(&to->newrq_mutex);
709 debug(DBG_DBG, "sendrq: inserting packet with id %d in queue for %s", i, to->peer.host);
710 to->requests[i] = *rq;
715 debug(DBG_DBG, "signalling client writer");
716 pthread_cond_signal(&to->newrq_cond);
718 pthread_mutex_unlock(&to->newrq_mutex);
721 void sendreply(struct client *to, unsigned char *buf, struct sockaddr_storage *tosa) {
722 struct replyq *replyq = to->replyq;
724 if (!radsign(buf, (unsigned char *)to->peer.secret)) {
726 debug(DBG_WARN, "sendreply: failed to sign message");
730 pthread_mutex_lock(&replyq->count_mutex);
731 if (replyq->count == replyq->size) {
732 debug(DBG_WARN, "No room in queue, dropping request");
733 pthread_mutex_unlock(&replyq->count_mutex);
738 replyq->replies[replyq->count].buf = buf;
740 replyq->replies[replyq->count].tosa = *tosa;
743 if (replyq->count == 1) {
744 debug(DBG_DBG, "signalling server writer");
745 pthread_cond_signal(&replyq->count_cond);
747 pthread_mutex_unlock(&replyq->count_mutex);
750 int pwdencrypt(uint8_t *in, uint8_t len, char *shared, uint8_t sharedlen, uint8_t *auth) {
751 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
752 static unsigned char first = 1;
753 static EVP_MD_CTX mdctx;
754 unsigned char hash[EVP_MAX_MD_SIZE], *input;
756 uint8_t i, offset = 0, out[128];
758 pthread_mutex_lock(&lock);
760 EVP_MD_CTX_init(&mdctx);
766 if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) ||
767 !EVP_DigestUpdate(&mdctx, (uint8_t *)shared, sharedlen) ||
768 !EVP_DigestUpdate(&mdctx, input, 16) ||
769 !EVP_DigestFinal_ex(&mdctx, hash, &md_len) ||
771 pthread_mutex_unlock(&lock);
774 for (i = 0; i < 16; i++)
775 out[offset + i] = hash[i] ^ in[offset + i];
776 input = out + offset - 16;
781 memcpy(in, out, len);
782 pthread_mutex_unlock(&lock);
786 int pwddecrypt(uint8_t *in, uint8_t len, char *shared, uint8_t sharedlen, uint8_t *auth) {
787 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
788 static unsigned char first = 1;
789 static EVP_MD_CTX mdctx;
790 unsigned char hash[EVP_MAX_MD_SIZE], *input;
792 uint8_t i, offset = 0, out[128];
794 pthread_mutex_lock(&lock);
796 EVP_MD_CTX_init(&mdctx);
802 if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) ||
803 !EVP_DigestUpdate(&mdctx, (uint8_t *)shared, sharedlen) ||
804 !EVP_DigestUpdate(&mdctx, input, 16) ||
805 !EVP_DigestFinal_ex(&mdctx, hash, &md_len) ||
807 pthread_mutex_unlock(&lock);
810 for (i = 0; i < 16; i++)
811 out[offset + i] = hash[i] ^ in[offset + i];
817 memcpy(in, out, len);
818 pthread_mutex_unlock(&lock);
822 int msmppencrypt(uint8_t *text, uint8_t len, uint8_t *shared, uint8_t sharedlen, uint8_t *auth, uint8_t *salt) {
823 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
824 static unsigned char first = 1;
825 static EVP_MD_CTX mdctx;
826 unsigned char hash[EVP_MAX_MD_SIZE];
830 pthread_mutex_lock(&lock);
832 EVP_MD_CTX_init(&mdctx);
837 printf("msppencrypt auth in: ");
838 for (i = 0; i < 16; i++)
839 printf("%02x ", auth[i]);
842 printf("msppencrypt salt in: ");
843 for (i = 0; i < 2; i++)
844 printf("%02x ", salt[i]);
847 printf("msppencrypt in: ");
848 for (i = 0; i < len; i++)
849 printf("%02x ", text[i]);
853 if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) ||
854 !EVP_DigestUpdate(&mdctx, shared, sharedlen) ||
855 !EVP_DigestUpdate(&mdctx, auth, 16) ||
856 !EVP_DigestUpdate(&mdctx, salt, 2) ||
857 !EVP_DigestFinal_ex(&mdctx, hash, &md_len)) {
858 pthread_mutex_unlock(&lock);
863 printf("msppencrypt hash: ");
864 for (i = 0; i < 16; i++)
865 printf("%02x ", hash[i]);
869 for (i = 0; i < 16; i++)
872 for (offset = 16; offset < len; offset += 16) {
874 printf("text + offset - 16 c(%d): ", offset / 16);
875 for (i = 0; i < 16; i++)
876 printf("%02x ", (text + offset - 16)[i]);
879 if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) ||
880 !EVP_DigestUpdate(&mdctx, shared, sharedlen) ||
881 !EVP_DigestUpdate(&mdctx, text + offset - 16, 16) ||
882 !EVP_DigestFinal_ex(&mdctx, hash, &md_len) ||
884 pthread_mutex_unlock(&lock);
888 printf("msppencrypt hash: ");
889 for (i = 0; i < 16; i++)
890 printf("%02x ", hash[i]);
894 for (i = 0; i < 16; i++)
895 text[offset + i] ^= hash[i];
899 printf("msppencrypt out: ");
900 for (i = 0; i < len; i++)
901 printf("%02x ", text[i]);
905 pthread_mutex_unlock(&lock);
909 int msmppdecrypt(uint8_t *text, uint8_t len, uint8_t *shared, uint8_t sharedlen, uint8_t *auth, uint8_t *salt) {
910 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
911 static unsigned char first = 1;
912 static EVP_MD_CTX mdctx;
913 unsigned char hash[EVP_MAX_MD_SIZE];
918 pthread_mutex_lock(&lock);
920 EVP_MD_CTX_init(&mdctx);
925 printf("msppdecrypt auth in: ");
926 for (i = 0; i < 16; i++)
927 printf("%02x ", auth[i]);
930 printf("msppedecrypt salt in: ");
931 for (i = 0; i < 2; i++)
932 printf("%02x ", salt[i]);
935 printf("msppedecrypt in: ");
936 for (i = 0; i < len; i++)
937 printf("%02x ", text[i]);
941 if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) ||
942 !EVP_DigestUpdate(&mdctx, shared, sharedlen) ||
943 !EVP_DigestUpdate(&mdctx, auth, 16) ||
944 !EVP_DigestUpdate(&mdctx, salt, 2) ||
945 !EVP_DigestFinal_ex(&mdctx, hash, &md_len)) {
946 pthread_mutex_unlock(&lock);
951 printf("msppedecrypt hash: ");
952 for (i = 0; i < 16; i++)
953 printf("%02x ", hash[i]);
957 for (i = 0; i < 16; i++)
958 plain[i] = text[i] ^ hash[i];
960 for (offset = 16; offset < len; offset += 16) {
962 printf("text + offset - 16 c(%d): ", offset / 16);
963 for (i = 0; i < 16; i++)
964 printf("%02x ", (text + offset - 16)[i]);
967 if (!EVP_DigestInit_ex(&mdctx, EVP_md5(), NULL) ||
968 !EVP_DigestUpdate(&mdctx, shared, sharedlen) ||
969 !EVP_DigestUpdate(&mdctx, text + offset - 16, 16) ||
970 !EVP_DigestFinal_ex(&mdctx, hash, &md_len) ||
972 pthread_mutex_unlock(&lock);
976 printf("msppedecrypt hash: ");
977 for (i = 0; i < 16; i++)
978 printf("%02x ", hash[i]);
982 for (i = 0; i < 16; i++)
983 plain[offset + i] = text[offset + i] ^ hash[i];
986 memcpy(text, plain, len);
988 printf("msppedecrypt out: ");
989 for (i = 0; i < len; i++)
990 printf("%02x ", text[i]);
994 pthread_mutex_unlock(&lock);
998 int id2server(struct server **server, char *id, uint8_t len) {
1000 for (i = 0; i < realm_count; i++)
1001 if (!regexec(&realms[i].regex, id, 0, NULL, 0)) {
1002 debug(DBG_DBG, "found matching realm: %s, host %s", realms[i].name, realms[i].server->peer.host);
1003 *server = realms[i].server;
1009 int rqinqueue(struct server *to, struct client *from, uint8_t id) {
1012 pthread_mutex_lock(&to->newrq_mutex);
1013 for (i = 0; i < MAX_REQUESTS; i++)
1014 if (to->requests[i].buf && to->requests[i].origid == id && to->requests[i].from == from)
1016 pthread_mutex_unlock(&to->newrq_mutex);
1018 return i < MAX_REQUESTS;
1021 int attrvalidate(unsigned char *attrs, int length) {
1022 while (length > 1) {
1023 if (ATTRLEN(attrs) < 2) {
1024 debug(DBG_WARN, "attrvalidate: invalid attribute length %d", ATTRLEN(attrs));
1027 length -= ATTRLEN(attrs);
1029 debug(DBG_WARN, "attrvalidate: attribute length %d exceeds packet length", ATTRLEN(attrs));
1032 attrs += ATTRLEN(attrs);
1035 debug(DBG_WARN, "attrvalidate: malformed packet? remaining byte after last attribute");
1039 int pwdrecrypt(uint8_t *pwd, uint8_t len, char *oldsecret, char *newsecret, uint8_t *oldauth, uint8_t *newauth) {
1043 if (len < 16 || len > 128 || len % 16) {
1044 debug(DBG_WARN, "pwdrecrypt: invalid password length");
1048 if (!pwddecrypt(pwd, len, oldsecret, strlen(oldsecret), oldauth)) {
1049 debug(DBG_WARN, "pwdrecrypt: cannot decrypt password");
1053 printf("pwdrecrypt: password: ");
1054 for (i = 0; i < len; i++)
1055 printf("%02x ", pwd[i]);
1058 if (!pwdencrypt(pwd, len, newsecret, strlen(newsecret), newauth)) {
1059 debug(DBG_WARN, "pwdrecrypt: cannot encrypt password");
1065 int msmpprecrypt(uint8_t *msmpp, uint8_t len, char *oldsecret, char *newsecret, unsigned char *oldauth, char *newauth) {
1068 if (!msmppdecrypt(msmpp + 2, len - 2, (unsigned char *)oldsecret, strlen(oldsecret), oldauth, msmpp)) {
1069 debug(DBG_WARN, "msmpprecrypt: failed to decrypt msppe key");
1072 if (!msmppencrypt(msmpp + 2, len - 2, (unsigned char *)newsecret, strlen(newsecret), (unsigned char *)newauth, msmpp)) {
1073 debug(DBG_WARN, "msmpprecrypt: failed to encrypt msppe key");
1079 int msmppe(unsigned char *attrs, int length, uint8_t type, char *attrtxt, struct request *rq,
1080 char *oldsecret, char *newsecret) {
1081 unsigned char *attr;
1083 for (attr = attrs; (attr = attrget(attr, length - (attr - attrs), type)); attr += ATTRLEN(attr)) {
1084 debug(DBG_DBG, "msmppe: Got %s", attrtxt);
1085 if (!msmpprecrypt(ATTRVAL(attr), ATTRVALLEN(attr), oldsecret, newsecret, rq->buf + 4, rq->origauth))
1091 void respondstatusserver(struct request *rq) {
1092 unsigned char *resp;
1096 debug(DBG_ERR, "respondstatusserver: malloc failed");
1099 memcpy(resp, rq->buf, 20);
1100 resp[0] = RAD_Access_Accept;
1103 debug(DBG_DBG, "respondstatusserver: responding to %s", rq->from->peer.host);
1104 sendreply(rq->from, resp, rq->from->peer.type == 'U' ? &rq->fromsa : NULL);
1107 void respondreject(struct request *rq) {
1108 unsigned char *resp;
1112 debug(DBG_ERR, "respondreject: malloc failed");
1115 memcpy(resp, rq->buf, 20);
1116 resp[0] = RAD_Access_Reject;
1119 sendreply(rq->from, resp, rq->from->peer.type == 'U' ? &rq->fromsa : NULL);
1122 void radsrv(struct request *rq) {
1123 uint8_t code, id, *auth, *attrs, *attr;
1125 struct server *to = NULL;
1127 unsigned char *buf, newauth[16];
1130 code = *(uint8_t *)buf;
1131 id = *(uint8_t *)(buf + 1);
1133 auth = (uint8_t *)(buf + 4);
1135 debug(DBG_DBG, "radsrv: code %d, id %d, length %d", code, id, len);
1137 if (code != RAD_Access_Request && code != RAD_Status_Server) {
1138 debug(DBG_INFO, "radsrv: server currently accepts only access-requests and status-server, ignoring");
1146 if (!attrvalidate(attrs, len)) {
1147 debug(DBG_WARN, "radsrv: attribute validation failed, ignoring packet");
1152 if (code == RAD_Access_Request) {
1153 attr = attrget(attrs, len, RAD_Attr_User_Name);
1155 debug(DBG_WARN, "radsrv: ignoring request, no username attribute");
1159 memcpy(username, ATTRVAL(attr), ATTRVALLEN(attr));
1160 username[ATTRVALLEN(attr)] = '\0';
1161 debug(DBG_DBG, "Access Request with username: %s", username);
1163 if (!id2server(&to, username, strlen(username))) {
1164 debug(DBG_INFO, "radsrv: ignoring request, don't know where to send it");
1169 if (to && rqinqueue(to, rq->from, id)) {
1170 debug(DBG_INFO, "radsrv: already got request from host %s with id %d, ignoring", rq->from->peer.host, id);
1176 attr = attrget(attrs, len, RAD_Attr_Message_Authenticator);
1177 if (attr && (ATTRVALLEN(attr) != 16 || !checkmessageauth(buf, ATTRVAL(attr), rq->from->peer.secret))) {
1178 debug(DBG_WARN, "radsrv: message authentication failed");
1183 if (code == RAD_Status_Server) {
1184 respondstatusserver(rq);
1189 debug(DBG_INFO, "radsrv: sending reject to %s for %s", rq->from->peer.host, username);
1194 if (!RAND_bytes(newauth, 16)) {
1195 debug(DBG_WARN, "radsrv: failed to generate random auth");
1201 printauth("auth", auth);
1204 attr = attrget(attrs, len, RAD_Attr_User_Password);
1206 debug(DBG_DBG, "radsrv: found userpwdattr with value length %d", ATTRVALLEN(attr));
1207 if (!pwdrecrypt(ATTRVAL(attr), ATTRVALLEN(attr), rq->from->peer.secret, to->peer.secret, auth, newauth)) {
1213 attr = attrget(attrs, len, RAD_Attr_Tunnel_Password);
1215 debug(DBG_DBG, "radsrv: found tunnelpwdattr with value length %d", ATTRVALLEN(attr));
1216 if (!pwdrecrypt(ATTRVAL(attr), ATTRVALLEN(attr), rq->from->peer.secret, to->peer.secret, auth, newauth)) {
1223 memcpy(rq->origauth, auth, 16);
1224 memcpy(auth, newauth, 16);
1228 void *clientrd(void *arg) {
1229 struct server *server = (struct server *)arg;
1230 struct client *from;
1232 unsigned char *buf, *messageauth, *subattrs, *attrs, *attr;
1233 struct sockaddr_storage fromsa;
1234 struct timeval lastconnecttry;
1238 lastconnecttry = server->lastconnecttry;
1239 buf = (server->peer.type == 'U' ? radudpget(server->sock, NULL, &server, NULL) : radtlsget(server->peer.ssl));
1240 if (!buf && server->peer.type == 'T') {
1241 tlsconnect(server, &lastconnecttry, "clientrd");
1245 server->connectionok = 1;
1247 i = buf[1]; /* i is the id */
1250 case RAD_Access_Accept:
1251 debug(DBG_DBG, "got Access Accept with id %d", i);
1253 case RAD_Access_Reject:
1254 debug(DBG_DBG, "got Access Reject with id %d", i);
1256 case RAD_Access_Challenge:
1257 debug(DBG_DBG, "got Access Challenge with id %d", i);
1261 debug(DBG_INFO, "clientrd: discarding, only accept access accept, access reject and access challenge messages");
1265 pthread_mutex_lock(&server->newrq_mutex);
1266 if (!server->requests[i].buf || !server->requests[i].tries) {
1267 pthread_mutex_unlock(&server->newrq_mutex);
1269 debug(DBG_INFO, "clientrd: no matching request sent with this id, ignoring");
1273 if (server->requests[i].received) {
1274 pthread_mutex_unlock(&server->newrq_mutex);
1276 debug(DBG_INFO, "clientrd: already received, ignoring");
1280 if (!validauth(buf, server->requests[i].buf + 4, (unsigned char *)server->peer.secret)) {
1281 pthread_mutex_unlock(&server->newrq_mutex);
1283 debug(DBG_WARN, "clientrd: invalid auth, ignoring");
1287 from = server->requests[i].from;
1288 len = RADLEN(buf) - 20;
1291 if (!attrvalidate(attrs, len)) {
1292 pthread_mutex_unlock(&server->newrq_mutex);
1294 debug(DBG_WARN, "clientrd: attribute validation failed, ignoring packet");
1298 /* Message Authenticator */
1299 messageauth = attrget(attrs, len, RAD_Attr_Message_Authenticator);
1301 if (ATTRVALLEN(messageauth) != 16) {
1302 pthread_mutex_unlock(&server->newrq_mutex);
1304 debug(DBG_WARN, "clientrd: illegal message auth attribute length, ignoring packet");
1307 memcpy(tmp, buf + 4, 16);
1308 memcpy(buf + 4, server->requests[i].buf + 4, 16);
1309 if (!checkmessageauth(buf, ATTRVAL(messageauth), server->peer.secret)) {
1310 pthread_mutex_unlock(&server->newrq_mutex);
1312 debug(DBG_WARN, "clientrd: message authentication failed");
1315 memcpy(buf + 4, tmp, 16);
1316 debug(DBG_DBG, "clientrd: message auth ok");
1319 if (*server->requests[i].buf == RAD_Status_Server) {
1320 server->requests[i].received = 1;
1321 pthread_mutex_unlock(&server->newrq_mutex);
1323 debug(DBG_INFO, "clientrd: got status server response from %s", server->peer.host);
1328 for (attr = attrs; (attr = attrget(attr, len - (attr - attrs), RAD_Attr_Vendor_Specific)); attr += ATTRLEN(attr)) {
1329 if (ATTRVALLEN(attr) <= 4)
1332 if (((uint16_t *)attr)[1] != 0 || ntohs(((uint16_t *)attr)[2]) != 311) /* 311 == MS */
1335 sublen = ATTRVALLEN(attr) - 4;
1336 subattrs = ATTRVAL(attr) + 4;
1337 if (!attrvalidate(subattrs, sublen) ||
1338 !msmppe(subattrs, sublen, RAD_VS_ATTR_MS_MPPE_Send_Key, "MS MPPE Send Key",
1339 server->requests + i, server->peer.secret, from->peer.secret) ||
1340 !msmppe(subattrs, sublen, RAD_VS_ATTR_MS_MPPE_Recv_Key, "MS MPPE Recv Key",
1341 server->requests + i, server->peer.secret, from->peer.secret))
1345 pthread_mutex_unlock(&server->newrq_mutex);
1347 debug(DBG_WARN, "clientrd: MS attribute handling failed, ignoring packet");
1351 if (*buf == RAD_Access_Accept || *buf == RAD_Access_Reject) {
1352 attr = attrget(server->requests[i].buf + 20, RADLEN(server->requests[i].buf) - 20, RAD_Attr_User_Name);
1353 /* we know the attribute exists */
1354 memcpy(tmp, ATTRVAL(attr), ATTRVALLEN(attr));
1355 tmp[ATTRVALLEN(attr)] = '\0';
1357 case RAD_Access_Accept:
1358 debug(DBG_INFO, "Access Accept for %s from %s", tmp, server->peer.host);
1360 case RAD_Access_Reject:
1361 debug(DBG_INFO, "Access Reject for %s from %s", tmp, server->peer.host);
1366 /* once we set received = 1, requests[i] may be reused */
1367 buf[1] = (char)server->requests[i].origid;
1368 memcpy(buf + 4, server->requests[i].origauth, 16);
1370 printauth("origauth/buf+4", buf + 4);
1374 if (!createmessageauth(buf, ATTRVAL(messageauth), from->peer.secret)) {
1375 pthread_mutex_unlock(&server->newrq_mutex);
1379 debug(DBG_DBG, "clientrd: computed messageauthattr");
1382 if (from->peer.type == 'U')
1383 fromsa = server->requests[i].fromsa;
1384 server->requests[i].received = 1;
1385 pthread_mutex_unlock(&server->newrq_mutex);
1387 debug(DBG_DBG, "clientrd: giving packet back to where it came from");
1388 sendreply(from, buf, from->peer.type == 'U' ? &fromsa : NULL);
1392 void *clientwr(void *arg) {
1393 struct server *server = (struct server *)arg;
1395 pthread_t clientrdth;
1398 struct timeval now, lastsend;
1399 struct timespec timeout;
1400 struct request statsrvrq;
1401 unsigned char statsrvbuf[38];
1403 memset(&timeout, 0, sizeof(struct timespec));
1405 if (server->statusserver) {
1406 memset(&statsrvrq, 0, sizeof(struct request));
1407 memset(statsrvbuf, 0, sizeof(statsrvbuf));
1408 statsrvbuf[0] = RAD_Status_Server;
1410 statsrvbuf[20] = RAD_Attr_Message_Authenticator;
1411 statsrvbuf[21] = 18;
1412 gettimeofday(&lastsend, NULL);
1415 if (server->peer.type == 'U') {
1416 if ((server->sock = connecttoserver(server->peer.addrinfo)) < 0)
1417 debugx(1, DBG_ERR, "clientwr: connecttoserver failed");
1419 tlsconnect(server, NULL, "new client");
1421 if (pthread_create(&clientrdth, NULL, clientrd, (void *)server))
1422 debugx(1, DBG_ERR, "clientwr: pthread_create failed");
1425 pthread_mutex_lock(&server->newrq_mutex);
1426 if (!server->newrq) {
1427 gettimeofday(&now, NULL);
1428 if (server->statusserver) {
1429 /* random 0-7 seconds */
1430 RAND_bytes(&rnd, 1);
1432 if (!timeout.tv_sec || timeout.tv_sec - now.tv_sec > lastsend.tv_sec + STATUS_SERVER_PERIOD + rnd)
1433 timeout.tv_sec = lastsend.tv_sec + STATUS_SERVER_PERIOD + rnd;
1435 if (timeout.tv_sec) {
1436 debug(DBG_DBG, "clientwr: waiting up to %ld secs for new request", timeout.tv_sec - now.tv_sec);
1437 pthread_cond_timedwait(&server->newrq_cond, &server->newrq_mutex, &timeout);
1440 debug(DBG_DBG, "clientwr: waiting for new request");
1441 pthread_cond_wait(&server->newrq_cond, &server->newrq_mutex);
1444 if (server->newrq) {
1445 debug(DBG_DBG, "clientwr: got new request");
1448 debug(DBG_DBG, "clientwr: request timer expired, processing request queue");
1449 pthread_mutex_unlock(&server->newrq_mutex);
1451 for (i = 0; i < MAX_REQUESTS; i++) {
1452 pthread_mutex_lock(&server->newrq_mutex);
1453 while (!server->requests[i].buf && i < MAX_REQUESTS)
1455 if (i == MAX_REQUESTS) {
1456 pthread_mutex_unlock(&server->newrq_mutex);
1459 rq = server->requests + i;
1462 debug(DBG_DBG, "clientwr: packet %d in queue is marked as received", i);
1464 debug(DBG_DBG, "clientwr: freeing received packet %d from queue", i);
1466 /* setting this to NULL means that it can be reused */
1469 pthread_mutex_unlock(&server->newrq_mutex);
1473 gettimeofday(&now, NULL);
1474 if (now.tv_sec < rq->expiry.tv_sec) {
1475 if (!timeout.tv_sec || rq->expiry.tv_sec < timeout.tv_sec)
1476 timeout.tv_sec = rq->expiry.tv_sec;
1477 pthread_mutex_unlock(&server->newrq_mutex);
1481 if (rq->tries == (*rq->buf == RAD_Status_Server || server->peer.type == 'T'
1482 ? 1 : REQUEST_RETRIES)) {
1483 debug(DBG_DBG, "clientwr: removing expired packet from queue");
1484 if (*rq->buf == RAD_Status_Server)
1485 debug(DBG_WARN, "clientwr: no status server response, %s dead?", server->peer.host);
1487 /* setting this to NULL means that it can be reused */
1489 pthread_mutex_unlock(&server->newrq_mutex);
1492 pthread_mutex_unlock(&server->newrq_mutex);
1494 rq->expiry.tv_sec = now.tv_sec +
1495 (*rq->buf == RAD_Status_Server || server->peer.type == 'T'
1496 ? REQUEST_EXPIRY : REQUEST_EXPIRY / REQUEST_RETRIES);
1497 if (!timeout.tv_sec || rq->expiry.tv_sec < timeout.tv_sec)
1498 timeout.tv_sec = rq->expiry.tv_sec;
1500 clientradput(server, server->requests[i].buf);
1501 gettimeofday(&lastsend, NULL);
1503 if (server->statusserver) {
1504 gettimeofday(&now, NULL);
1505 if (now.tv_sec - lastsend.tv_sec >= STATUS_SERVER_PERIOD) {
1506 if (!RAND_bytes(statsrvbuf + 4, 16)) {
1507 debug(DBG_WARN, "clientwr: failed to generate random auth");
1510 statsrvrq.buf = malloc(sizeof(statsrvbuf));
1511 if (!statsrvrq.buf) {
1512 debug(DBG_ERR, "clientwr: malloc failed");
1515 memcpy(statsrvrq.buf, statsrvbuf, sizeof(statsrvbuf));
1516 debug(DBG_DBG, "clientwr: sending status server to %s", server->peer.host);
1517 lastsend.tv_sec = now.tv_sec;
1518 sendrq(server, &statsrvrq);
1524 void *udpserverwr(void *arg) {
1525 struct replyq *replyq = &udp_server_replyq;
1526 struct reply *reply = replyq->replies;
1528 pthread_mutex_lock(&replyq->count_mutex);
1530 while (!replyq->count) {
1531 debug(DBG_DBG, "udp server writer, waiting for signal");
1532 pthread_cond_wait(&replyq->count_cond, &replyq->count_mutex);
1533 debug(DBG_DBG, "udp server writer, got signal");
1535 pthread_mutex_unlock(&replyq->count_mutex);
1537 if (sendto(udp_server_sock, reply->buf, RADLEN(reply->buf), 0,
1538 (struct sockaddr *)&reply->tosa, SOCKADDR_SIZE(reply->tosa)) < 0)
1539 debug(DBG_WARN, "sendudp: send failed");
1542 pthread_mutex_lock(&replyq->count_mutex);
1544 memmove(replyq->replies, replyq->replies + 1,
1545 replyq->count * sizeof(struct reply));
1549 void *udpserverrd(void *arg) {
1551 pthread_t udpserverwrth;
1553 if ((udp_server_sock = bindtoaddr(udp_server_listen->addrinfo)) < 0)
1554 debugx(1, DBG_ERR, "udpserverrd: socket/bind failed");
1556 debug(DBG_WARN, "udpserverrd: listening for UDP on %s:%s",
1557 udp_server_listen->host ? udp_server_listen->host : "*", udp_server_listen->port);
1559 if (pthread_create(&udpserverwrth, NULL, udpserverwr, NULL))
1560 debugx(1, DBG_ERR, "pthread_create failed");
1563 memset(&rq, 0, sizeof(struct request));
1564 rq.buf = radudpget(udp_server_sock, &rq.from, NULL, &rq.fromsa);
1569 void *tlsserverwr(void *arg) {
1571 unsigned long error;
1572 struct client *client = (struct client *)arg;
1573 struct replyq *replyq;
1575 debug(DBG_DBG, "tlsserverwr starting for %s", client->peer.host);
1576 replyq = client->replyq;
1577 pthread_mutex_lock(&replyq->count_mutex);
1579 while (!replyq->count) {
1580 if (client->peer.ssl) {
1581 debug(DBG_DBG, "tls server writer, waiting for signal");
1582 pthread_cond_wait(&replyq->count_cond, &replyq->count_mutex);
1583 debug(DBG_DBG, "tls server writer, got signal");
1585 if (!client->peer.ssl) {
1586 /* ssl might have changed while waiting */
1587 pthread_mutex_unlock(&replyq->count_mutex);
1588 debug(DBG_DBG, "tlsserverwr: exiting as requested");
1592 pthread_mutex_unlock(&replyq->count_mutex);
1593 cnt = SSL_write(client->peer.ssl, replyq->replies->buf, RADLEN(replyq->replies->buf));
1595 debug(DBG_DBG, "tlsserverwr: Sent %d bytes, Radius packet of length %d",
1596 cnt, RADLEN(replyq->replies->buf));
1598 while ((error = ERR_get_error()))
1599 debug(DBG_ERR, "tlsserverwr: SSL: %s", ERR_error_string(error, NULL));
1600 free(replyq->replies->buf);
1602 pthread_mutex_lock(&replyq->count_mutex);
1604 memmove(replyq->replies, replyq->replies + 1, replyq->count * sizeof(struct reply));
1608 void *tlsserverrd(void *arg) {
1610 unsigned long error;
1612 struct client *client = (struct client *)arg;
1613 pthread_t tlsserverwrth;
1616 debug(DBG_DBG, "tlsserverrd starting for %s", client->peer.host);
1617 ssl = client->peer.ssl;
1619 if (SSL_accept(ssl) <= 0) {
1620 while ((error = ERR_get_error()))
1621 debug(DBG_ERR, "tlsserverrd: SSL: %s", ERR_error_string(error, NULL));
1622 debug(DBG_ERR, "SSL_accept failed");
1625 if (tlsverifycert(&client->peer)) {
1626 if (pthread_create(&tlsserverwrth, NULL, tlsserverwr, (void *)client)) {
1627 debug(DBG_ERR, "tlsserverrd: pthread_create failed");
1631 memset(&rq, 0, sizeof(struct request));
1632 rq.buf = radtlsget(client->peer.ssl);
1635 debug(DBG_DBG, "tlsserverrd: got Radius message from %s", client->peer.host);
1639 debug(DBG_ERR, "tlsserverrd: connection lost");
1640 /* stop writer by setting peer.ssl to NULL and give signal in case waiting for data */
1641 client->peer.ssl = NULL;
1642 pthread_mutex_lock(&client->replyq->count_mutex);
1643 pthread_cond_signal(&client->replyq->count_cond);
1644 pthread_mutex_unlock(&client->replyq->count_mutex);
1645 debug(DBG_DBG, "tlsserverrd: waiting for writer to end");
1646 pthread_join(tlsserverwrth, NULL);
1650 s = SSL_get_fd(ssl);
1652 shutdown(s, SHUT_RDWR);
1654 debug(DBG_DBG, "tlsserverrd thread for %s exiting", client->peer.host);
1655 client->peer.ssl = NULL;
1660 pthread_t tlsserverth;
1662 struct sockaddr_storage from;
1663 size_t fromlen = sizeof(from);
1664 struct client *client;
1666 if ((s = bindtoaddr(tcp_server_listen->addrinfo)) < 0)
1667 debugx(1, DBG_ERR, "tlslistener: socket/bind failed");
1670 debug(DBG_WARN, "listening for incoming TCP on %s:%s",
1671 tcp_server_listen->host ? tcp_server_listen->host : "*", tcp_server_listen->port);
1674 snew = accept(s, (struct sockaddr *)&from, &fromlen);
1676 debug(DBG_WARN, "accept failed");
1679 debug(DBG_WARN, "incoming TLS connection from %s", addr2string((struct sockaddr *)&from, fromlen));
1681 client = find_client('T', (struct sockaddr *)&from, NULL);
1683 debug(DBG_WARN, "ignoring request, not a known TLS client");
1684 shutdown(snew, SHUT_RDWR);
1689 if (client->peer.ssl) {
1690 debug(DBG_WARN, "Ignoring incoming TLS connection, already have one from this client");
1691 shutdown(snew, SHUT_RDWR);
1695 client->peer.ssl = SSL_new(ssl_ctx);
1696 SSL_set_fd(client->peer.ssl, snew);
1697 if (pthread_create(&tlsserverth, NULL, tlsserverrd, (void *)client)) {
1698 debug(DBG_ERR, "tlslistener: pthread_create failed");
1699 SSL_free(client->peer.ssl);
1700 shutdown(snew, SHUT_RDWR);
1702 client->peer.ssl = NULL;
1705 pthread_detach(tlsserverth);
1710 void addrealm(char *value, char *server) {
1712 struct realm *realm;
1713 char *s, *regex = NULL;
1716 for (i = 0; i < server_count; i++)
1717 if (!strcasecmp(server, servers[i].peer.host))
1719 if (i == server_count)
1720 debugx(1, DBG_ERR, "addrealm failed, no server %s", server);
1723 if (*value != '/') {
1724 /* not a regexp, let us make it one */
1725 if (*value == '*' && !value[1])
1726 regex = stringcopy(".*", 0);
1728 for (n = 0, s = value; *s;)
1731 regex = malloc(strlen(value) + n + 3);
1734 for (n = 1, s = value; *s; s++) {
1744 debugx(1, DBG_ERR, "malloc failed");
1745 debug(DBG_DBG, "addrealm: constructed regexp %s from %s", regex, value);
1749 realms = realloc(realms, realm_count * sizeof(struct realm));
1751 debugx(1, DBG_ERR, "malloc failed");
1752 realm = realms + realm_count - 1;
1753 memset(realm, 0, sizeof(struct realm));
1754 realm->name = stringcopy(value, 0);
1756 debugx(1, DBG_ERR, "malloc failed");
1758 realm->server = servers + i;
1759 if (regcomp(&realm->regex, regex ? regex : value + 1, REG_ICASE | REG_NOSUB))
1760 debugx(1, DBG_ERR, "addrealm: failed to compile regular expression %s", regex ? regex : value + 1);
1763 debug(DBG_DBG, "addrealm: added realm %s for server %s", value, server);
1766 char *parsehostport(char *s, struct peer *peer) {
1771 /* allow literal addresses and port, e.g. [2001:db8::1]:1812 */
1775 for (; *p && *p != ']' && *p != ' ' && *p != '\t' && *p != '\n'; p++);
1777 debugx(1, DBG_ERR, "no ] matching initial [");
1781 for (; *p && *p != ':' && *p != ' ' && *p != '\t' && *p != '\n'; p++);
1784 debugx(1, DBG_ERR, "missing host/address");
1786 peer->host = stringcopy(field, p - field);
1789 if (*p && *p != ':' && *p != ' ' && *p != '\t' && *p != '\n')
1790 debugx(1, DBG_ERR, "unexpected character after ]");
1793 /* port number or service name is specified */;
1795 for (; *p && *p != ' ' && *p != '\t' && *p != '\n'; p++);
1797 debugx(1, DBG_ERR, "syntax error, : but no following port");
1798 peer->port = stringcopy(field, p - field);
1800 peer->port = stringcopy(peer->type == 'U' ? DEFAULT_UDP_PORT : DEFAULT_TLS_PORT, 0);
1804 FILE *openconfigfile(const char *filename) {
1806 char pathname[100], *base = NULL;
1808 f = fopen(filename, "r");
1810 debug(DBG_DBG, "reading config file %s", filename);
1814 if (strlen(filename) + 1 <= sizeof(pathname)) {
1815 /* basename() might modify the string */
1816 strcpy(pathname, filename);
1817 base = basename(pathname);
1818 f = fopen(base, "r");
1822 debugx(1, DBG_ERR, "could not read config file %s nor %s\n%s", filename, base, strerror(errno));
1824 debug(DBG_DBG, "reading config file %s", base);
1828 struct peer *server_create(char type) {
1829 struct peer *server;
1832 server = malloc(sizeof(struct peer));
1834 debugx(1, DBG_ERR, "malloc failed");
1835 memset(server, 0, sizeof(struct peer));
1836 server->type = type;
1837 conf = (type == 'T' ? options.listentcp : options.listenudp);
1839 parsehostport(conf, server);
1840 if (!strcmp(server->host, "*")) {
1842 server->host = NULL;
1845 server->port = stringcopy(type == 'T' ? DEFAULT_TLS_PORT : DEFAULT_UDP_PORT, 0);
1846 if (!resolvepeer(server, AI_PASSIVE))
1847 debugx(1, DBG_ERR, "failed to resolve host %s port %s, exiting", server->host, server->port);
1851 /* returns NULL on error, where to continue parsing if token and ok. E.g. "" will return token with empty string */
1852 char *strtokenquote(char *s, char **token, char *del, char *quote) {
1853 char *t = s, *q, *r;
1855 if (!t || !token || !del)
1857 while (*t && strchr(del, *t))
1861 return t + 1; /* needs to be non-NULL, but value doesn't matter */
1863 if (quote && (q = strchr(quote, *t))) {
1866 while (*t && *t != *q)
1868 if (!*t || (t[1] && !strchr(del, t[1])))
1876 while (*t && !strchr(del, *t))
1882 /* Parses config with following syntax:
1885 * option-name = value
1887 * option-name value {
1888 * option-name [=] value
1892 void getgeneralconfig(FILE *f, char *block, ...) {
1895 /* initialise lots of stuff to avoid stupid compiler warnings */
1896 char *tokens[3], *s, *opt = NULL, *val = NULL, *word, **str = NULL;
1897 int type = 0, tcount, conftype = 0;
1898 void (*cbk)(FILE *, char *, char *) = NULL;
1900 while (fgets(line, 1024, f)) {
1902 for (tcount = 0; tcount < 3; tcount++) {
1903 s = strtokenquote(s, &tokens[tcount], " \t\n", "\"'");
1905 debugx(1, DBG_ERR, "Syntax error in line starting with: %s", line);
1906 if (!tokens[tcount])
1909 if (!tcount || **tokens == '#')
1912 if (**tokens == '}') {
1915 debugx(1, DBG_ERR, "configuration error, found } with no matching {");
1922 conftype = CONF_STR;
1925 if (tokens[1][0] == '=' && tokens[1][1] == '\0') {
1928 conftype = CONF_STR;
1931 if (tokens[2][0] == '{' && tokens[2][1] == '\0') {
1934 conftype = CONF_CBK;
1940 debugx(1, DBG_ERR, "configuration error in block %s, line starting with %s", block, tokens[0]);
1941 debugx(1, DBG_ERR, "configuration error, syntax error in line starting with %s", tokens[0]);
1945 debugx(1, DBG_ERR, "configuration error, option %s needs a non-empty value", opt);
1947 va_start(ap, block);
1948 while ((word = va_arg(ap, char *))) {
1949 type = va_arg(ap, int);
1952 str = va_arg(ap, char **);
1954 debugx(1, DBG_ERR, "getgeneralconfig: internal parameter error");
1957 cbk = va_arg(ap, void (*)(FILE *, char *, char *));
1960 debugx(1, DBG_ERR, "getgeneralconfig: internal parameter error");
1962 if (!strcasecmp(opt, word))
1969 debugx(1, DBG_ERR, "configuration error in block %s, unknown option %s", block, opt);
1970 debugx(1, DBG_ERR, "configuration error, unknown option %s", opt);
1973 if (type != conftype) {
1975 debugx(1, DBG_ERR, "configuration error in block %s, wrong syntax for option %s", block, opt);
1976 debugx(1, DBG_ERR, "configuration error, wrong syntax for option %s", opt);
1982 debug(DBG_DBG, "getgeneralconfig: block %s: %s = %s", block, opt, val);
1984 debug(DBG_DBG, "getgeneralconfig: %s = %s", opt, val);
1985 *str = stringcopy(val, 0);
1991 debugx(1, DBG_ERR, "getgeneralconfig: internal parameter error");
1996 void confclsrv_cb(FILE *f, char *opt, char *val) {
1997 char *type = NULL, *secret = NULL, *port = NULL, *statusserver = NULL;
1999 struct client *client = NULL;
2000 struct server *server = NULL;
2003 block = malloc(strlen(opt) + strlen(val) + 2);
2005 debugx(1, DBG_ERR, "malloc failed");
2006 sprintf(block, "%s %s", opt, val);
2007 debug(DBG_DBG, "confclsrv_cb called for %s", block);
2009 if (!strcasecmp(opt, "client")) {
2010 getgeneralconfig(f, block,
2011 "type", CONF_STR, &type,
2012 "secret", CONF_STR, &secret,
2016 clients = realloc(clients, client_count * sizeof(struct client));
2018 debugx(1, DBG_ERR, "malloc failed");
2019 client = clients + client_count - 1;
2020 memset(client, 0, sizeof(struct client));
2021 peer = &client->peer;
2023 getgeneralconfig(f, block,
2024 "type", CONF_STR, &type,
2025 "secret", CONF_STR, &secret,
2026 "port", CONF_STR, &port,
2027 "StatusServer", CONF_STR, &statusserver,
2031 servers = realloc(servers, server_count * sizeof(struct server));
2033 debugx(1, DBG_ERR, "malloc failed");
2034 server = servers + server_count - 1;
2035 memset(server, 0, sizeof(struct server));
2036 peer = &server->peer;
2039 if (!strcasecmp(statusserver, "on"))
2040 server->statusserver = 1;
2041 else if (strcasecmp(statusserver, "off"))
2042 debugx(1, DBG_ERR, "error in block %s, StatusServer is %s, must be on or off", block, statusserver);
2047 peer->host = stringcopy(val, 0);
2049 if (type && !strcasecmp(type, "udp")) {
2056 peer->port = stringcopy(DEFAULT_UDP_PORT, 0);
2058 } else if (type && !strcasecmp(type, "tls")) {
2065 peer->port = stringcopy(DEFAULT_TLS_PORT, 0);
2068 debugx(1, DBG_ERR, "error in block %s, type must be set to UDP or TLS", block);
2071 if (!resolvepeer(peer, 0))
2072 debugx(1, DBG_ERR, "failed to resolve host %s port %s, exiting", peer->host, peer->port);
2075 if (peer->type == 'U')
2076 debugx(1, DBG_ERR, "error in block %s, secret must be specified for UDP", block);
2077 peer->secret = stringcopy(DEFAULT_TLS_SECRET, 0);
2079 peer->secret = secret;
2083 if (peer->type == 'U')
2084 client->replyq = &udp_server_replyq;
2086 client->replyq = malloc(sizeof(struct replyq));
2087 if (!client->replyq)
2088 debugx(1, DBG_ERR, "malloc failed");
2089 client->replyq->replies = calloc(MAX_REQUESTS, sizeof(struct reply));
2090 if (!client->replyq->replies)
2091 debugx(1, DBG_ERR, "malloc failed");
2092 client->replyq->size = MAX_REQUESTS;
2093 client->replyq->count = 0;
2094 pthread_mutex_init(&client->replyq->count_mutex, NULL);
2095 pthread_cond_init(&client->replyq->count_cond, NULL);
2098 pthread_mutex_init(&server->lock, NULL);
2100 server->requests = calloc(MAX_REQUESTS, sizeof(struct request));
2101 if (!server->requests)
2102 debugx(1, DBG_ERR, "malloc failed");
2104 pthread_mutex_init(&server->newrq_mutex, NULL);
2105 pthread_cond_init(&server->newrq_cond, NULL);
2111 void confrealm_cb(FILE *f, char *opt, char *val) {
2112 char *server = NULL;
2115 block = malloc(strlen(opt) + strlen(val) + 2);
2117 debugx(1, DBG_ERR, "malloc failed");
2118 sprintf(block, "%s %s", opt, val);
2119 debug(DBG_DBG, "confrealm_cb called for %s", block);
2121 getgeneralconfig(f, block,
2122 "server", CONF_STR, &server,
2127 debugx(1, DBG_ERR, "error in block %s, server must be specified", block);
2129 addrealm(val, server);
2134 void getmainconfig(const char *configfile) {
2136 char *loglevel = NULL;
2138 f = openconfigfile(configfile);
2139 memset(&options, 0, sizeof(options));
2141 getgeneralconfig(f, NULL,
2142 "TLSCACertificateFile", CONF_STR, &options.tlscacertificatefile,
2143 "TLSCACertificatePath", CONF_STR, &options.tlscacertificatepath,
2144 "TLSCertificateFile", CONF_STR, &options.tlscertificatefile,
2145 "TLSCertificateKeyFile", CONF_STR, &options.tlscertificatekeyfile,
2146 "TLSCertificateKeyPassword", CONF_STR, &options.tlscertificatekeypassword,
2147 "ListenUDP", CONF_STR, &options.listenudp,
2148 "ListenTCP", CONF_STR, &options.listentcp,
2149 "LogLevel", CONF_STR, &loglevel,
2150 "LogDestination", CONF_STR, &options.logdestination,
2151 "Client", CONF_CBK, confclsrv_cb,
2152 "Server", CONF_CBK, confclsrv_cb,
2153 "Realm", CONF_CBK, confrealm_cb,
2159 if (strlen(loglevel) != 1 || *loglevel < '1' || *loglevel > '4')
2160 debugx(1, DBG_ERR, "error in %s, value of option LogLevel is %s, must be 1, 2, 3 or 4", configfile, loglevel);
2161 options.loglevel = *loglevel - '0';
2165 if (client_udp_count) {
2166 udp_server_replyq.replies = malloc(client_udp_count * MAX_REQUESTS * sizeof(struct reply));
2167 if (!udp_server_replyq.replies)
2168 debugx(1, DBG_ERR, "malloc failed");
2169 udp_server_replyq.size = client_udp_count * MAX_REQUESTS;
2170 udp_server_replyq.count = 0;
2171 pthread_mutex_init(&udp_server_replyq.count_mutex, NULL);
2172 pthread_cond_init(&udp_server_replyq.count_cond, NULL);
2176 void getargs(int argc, char **argv, uint8_t *foreground, uint8_t *loglevel, char **configfile) {
2179 while ((c = getopt(argc, argv, "c:d:fv")) != -1) {
2182 *configfile = optarg;
2185 if (strlen(optarg) != 1 || *optarg < '1' || *optarg > '4')
2186 debugx(1, DBG_ERR, "Debug level must be 1, 2, 3 or 4, not %s", optarg);
2187 *loglevel = *optarg - '0';
2193 debugx(0, DBG_ERR, "radsecproxy revision $Rev$");
2198 if (!(argc - optind))
2202 debug(DBG_ERR, "Usage:\n%s [ -c configfile ] [ -d debuglevel ] [ -f ] [ -v ]", argv[0]);
2206 int main(int argc, char **argv) {
2207 pthread_t udpserverth;
2209 uint8_t foreground = 0, loglevel = 0;
2210 char *configfile = NULL;
2212 debug_init("radsecproxy");
2213 debug_set_level(DEBUG_LEVEL);
2214 getargs(argc, argv, &foreground, &loglevel, &configfile);
2216 debug_set_level(loglevel);
2217 getmainconfig(configfile ? configfile : CONFIG_MAIN);
2219 options.loglevel = loglevel;
2220 else if (options.loglevel)
2221 debug_set_level(options.loglevel);
2223 options.logdestination = NULL;
2225 if (!options.logdestination)
2226 options.logdestination = "x-syslog://";
2227 debug_set_destination(options.logdestination);
2231 debugx(1, DBG_ERR, "No servers configured, nothing to do, exiting");
2233 debugx(1, DBG_ERR, "No clients configured, nothing to do, exiting");
2235 debugx(1, DBG_ERR, "No realms configured, nothing to do, exiting");
2237 if (!foreground && (daemon(0, 0) < 0))
2238 debugx(1, DBG_ERR, "daemon() failed: %s", strerror(errno));
2240 if (client_udp_count) {
2241 udp_server_listen = server_create('U');
2242 if (pthread_create(&udpserverth, NULL, udpserverrd, NULL))
2243 debugx(1, DBG_ERR, "pthread_create failed");
2246 if (client_tls_count || server_tls_count)
2247 ssl_ctx = ssl_init();
2249 for (i = 0; i < server_count; i++)
2250 if (pthread_create(&servers[i].clientth, NULL, clientwr, (void *)&servers[i]))
2251 debugx(1, DBG_ERR, "pthread_create failed");
2253 if (client_tls_count) {
2254 tcp_server_listen = server_create('T');
2255 return tlslistener();
2258 /* just hang around doing nothing, anything to do here? */