2 * Copyright (C) 2006-2008 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 #include <sys/socket.h>
11 #include <netinet/in.h>
20 #include <sys/types.h>
21 #include <sys/select.h>
24 #include <arpa/inet.h>
27 #include <openssl/ssl.h>
28 #include <openssl/err.h>
32 #include "radsecproxy.h"
35 int tlsconnect(struct server *server, struct timeval *when, int timeout, char *text) {
42 debug(DBG_DBG, "tlsconnect: called from %s", text);
43 pthread_mutex_lock(&server->lock);
44 if (when && memcmp(&server->lastconnecttry, when, sizeof(struct timeval))) {
45 /* already reconnected, nothing to do */
46 debug(DBG_DBG, "tlsconnect(%s): seems already reconnected", text);
47 pthread_mutex_unlock(&server->lock);
52 gettimeofday(&now, NULL);
53 elapsed = now.tv_sec - server->lastconnecttry.tv_sec;
54 if (timeout && server->lastconnecttry.tv_sec && elapsed > timeout) {
55 debug(DBG_DBG, "tlsconnect: timeout");
56 if (server->sock >= 0)
58 SSL_free(server->ssl);
60 pthread_mutex_unlock(&server->lock);
63 if (server->connectionok) {
64 server->connectionok = 0;
66 } else if (elapsed < 1)
68 else if (elapsed < 60) {
69 debug(DBG_INFO, "tlsconnect: sleeping %lds", elapsed);
71 } else if (elapsed < 100000) {
72 debug(DBG_INFO, "tlsconnect: sleeping %ds", 60);
75 server->lastconnecttry.tv_sec = now.tv_sec; /* no sleep at startup */
76 debug(DBG_WARN, "tlsconnect: trying to open TLS connection to %s port %s", server->conf->host, server->conf->port);
77 if (server->sock >= 0)
79 if ((server->sock = connecttcp(server->conf->addrinfo, getsrcprotores(RAD_TLS))) < 0) {
80 debug(DBG_ERR, "tlsconnect: connecttcp failed");
84 SSL_free(server->ssl);
86 ctx = tlsgetctx(RAD_TLS, server->conf->tlsconf);
89 server->ssl = SSL_new(ctx);
93 SSL_set_fd(server->ssl, server->sock);
94 if (SSL_connect(server->ssl) <= 0) {
95 while ((error = ERR_get_error()))
96 debug(DBG_ERR, "tlsconnect: TLS: %s", ERR_error_string(error, NULL));
99 cert = verifytlscert(server->ssl);
102 if (verifyconfcert(cert, server->conf)) {
108 debug(DBG_WARN, "tlsconnect: TLS connection to %s port %s up", server->conf->host, server->conf->port);
109 server->connectionok = 1;
110 gettimeofday(&server->lastconnecttry, NULL);
111 pthread_mutex_unlock(&server->lock);
115 /* timeout in seconds, 0 means no timeout (blocking), returns when num bytes have been read, or timeout */
116 /* returns 0 on timeout, -1 on error and num if ok */
117 int sslreadtimeout(SSL *ssl, unsigned char *buf, int num, int timeout) {
118 int s, ndesc, cnt, len;
119 fd_set readfds, writefds;
120 struct timeval timer;
125 /* make socket non-blocking? */
126 for (len = 0; len < num; len += cnt) {
131 timer.tv_sec = timeout;
134 ndesc = select(s + 1, &readfds, &writefds, NULL, timeout ? &timer : NULL);
138 cnt = SSL_read(ssl, buf + len, num - len);
140 switch (SSL_get_error(ssl, cnt)) {
141 case SSL_ERROR_WANT_READ:
142 case SSL_ERROR_WANT_WRITE:
145 case SSL_ERROR_ZERO_RETURN:
146 /* remote end sent close_notify, send one back */
156 /* timeout in seconds, 0 means no timeout (blocking) */
157 unsigned char *radtlsget(SSL *ssl, int timeout) {
159 unsigned char buf[4], *rad;
162 cnt = sslreadtimeout(ssl, buf, 4, timeout);
164 debug(DBG_DBG, cnt ? "radtlsget: connection lost" : "radtlsget: timeout");
171 debug(DBG_ERR, "radtlsget: malloc failed");
176 cnt = sslreadtimeout(ssl, rad + 4, len - 4, timeout);
178 debug(DBG_DBG, cnt ? "radtlsget: connection lost" : "radtlsget: timeout");
187 debug(DBG_WARN, "radtlsget: packet smaller than minimum radius size");
190 debug(DBG_DBG, "radtlsget: got %d bytes", len);
194 int clientradputtls(struct server *server, unsigned char *rad) {
198 struct clsrvconf *conf = server->conf;
200 if (!server->connectionok)
203 if ((cnt = SSL_write(server->ssl, rad, len)) <= 0) {
204 while ((error = ERR_get_error()))
205 debug(DBG_ERR, "clientradputtls: TLS: %s", ERR_error_string(error, NULL));
209 debug(DBG_DBG, "clientradputtls: Sent %d bytes, Radius packet of length %d to TLS peer %s", cnt, len, conf->host);
213 void *tlsclientrd(void *arg) {
214 struct server *server = (struct server *)arg;
216 struct timeval now, lastconnecttry;
219 /* yes, lastconnecttry is really necessary */
220 lastconnecttry = server->lastconnecttry;
221 buf = radtlsget(server->ssl, server->dynamiclookuparg ? IDLE_TIMEOUT : 0);
223 if (server->dynamiclookuparg)
225 tlsconnect(server, &lastconnecttry, 0, "tlsclientrd");
231 if (server->dynamiclookuparg) {
232 gettimeofday(&now, NULL);
233 if (now.tv_sec - server->lastreply.tv_sec > IDLE_TIMEOUT) {
234 debug(DBG_INFO, "tlsclientrd: idle timeout for %s", server->conf->name);
240 server->clientrdgone = 1;
244 void *tlsserverwr(void *arg) {
247 struct client *client = (struct client *)arg;
248 struct queue *replyq;
249 struct request *reply;
251 debug(DBG_DBG, "tlsserverwr: starting for %s", addr2string(client->addr));
252 replyq = client->replyq;
254 pthread_mutex_lock(&replyq->mutex);
255 while (!list_first(replyq->entries)) {
257 debug(DBG_DBG, "tlsserverwr: waiting for signal");
258 pthread_cond_wait(&replyq->cond, &replyq->mutex);
259 debug(DBG_DBG, "tlsserverwr: got signal");
262 /* ssl might have changed while waiting */
263 pthread_mutex_unlock(&replyq->mutex);
264 debug(DBG_DBG, "tlsserverwr: exiting as requested");
269 reply = (struct request *)list_shift(replyq->entries);
270 pthread_mutex_unlock(&replyq->mutex);
271 cnt = SSL_write(client->ssl, reply->replybuf, RADLEN(reply->replybuf));
273 debug(DBG_DBG, "tlsserverwr: sent %d bytes, Radius packet of length %d to %s",
274 cnt, RADLEN(reply->replybuf), addr2string(client->addr));
276 while ((error = ERR_get_error()))
277 debug(DBG_ERR, "tlsserverwr: SSL: %s", ERR_error_string(error, NULL));
282 void tlsserverrd(struct client *client) {
285 pthread_t tlsserverwrth;
287 debug(DBG_DBG, "tlsserverrd: starting for %s", addr2string(client->addr));
289 if (pthread_create(&tlsserverwrth, NULL, tlsserverwr, (void *)client)) {
290 debug(DBG_ERR, "tlsserverrd: pthread_create failed");
295 buf = radtlsget(client->ssl, 0);
297 debug(DBG_ERR, "tlsserverrd: connection from %s lost", addr2string(client->addr));
300 debug(DBG_DBG, "tlsserverrd: got Radius message from %s", addr2string(client->addr));
309 debug(DBG_ERR, "tlsserverrd: message authentication/validation failed, closing connection from %s", addr2string(client->addr));
314 /* stop writer by setting ssl to NULL and give signal in case waiting for data */
316 pthread_mutex_lock(&client->replyq->mutex);
317 pthread_cond_signal(&client->replyq->cond);
318 pthread_mutex_unlock(&client->replyq->mutex);
319 debug(DBG_DBG, "tlsserverrd: waiting for writer to end");
320 pthread_join(tlsserverwrth, NULL);
321 debug(DBG_DBG, "tlsserverrd: reader for %s exiting", addr2string(client->addr));
324 void *tlsservernew(void *arg) {
326 struct sockaddr_storage from;
327 socklen_t fromlen = sizeof(from);
328 struct clsrvconf *conf;
329 struct list_node *cur = NULL;
334 struct client *client;
337 if (getpeername(s, (struct sockaddr *)&from, &fromlen)) {
338 debug(DBG_DBG, "tlsservernew: getpeername failed, exiting");
341 debug(DBG_WARN, "tlsservernew: incoming TLS connection from %s", addr2string((struct sockaddr *)&from));
343 conf = find_clconf(RAD_TLS, (struct sockaddr *)&from, &cur);
345 ctx = tlsgetctx(RAD_TLS, conf->tlsconf);
353 if (SSL_accept(ssl) <= 0) {
354 while ((error = ERR_get_error()))
355 debug(DBG_ERR, "tlsservernew: SSL: %s", ERR_error_string(error, NULL));
356 debug(DBG_ERR, "tlsservernew: SSL_accept failed");
359 cert = verifytlscert(ssl);
365 if (verifyconfcert(cert, conf)) {
367 client = addclient(conf, 1);
370 client->addr = addr_copy((struct sockaddr *)&from);
372 removeclient(client);
374 debug(DBG_WARN, "tlsservernew: failed to create new client instance");
377 conf = find_clconf(RAD_TLS, (struct sockaddr *)&from, &cur);
379 debug(DBG_WARN, "tlsservernew: ignoring request, no matching TLS client");
389 shutdown(s, SHUT_RDWR);
394 void *tlslistener(void *arg) {
395 pthread_t tlsserverth;
396 int s, *sp = (int *)arg;
397 struct sockaddr_storage from;
398 socklen_t fromlen = sizeof(from);
403 s = accept(*sp, (struct sockaddr *)&from, &fromlen);
405 debug(DBG_WARN, "accept failed");
408 if (pthread_create(&tlsserverth, NULL, tlsservernew, (void *)&s)) {
409 debug(DBG_ERR, "tlslistener: pthread_create failed");
410 shutdown(s, SHUT_RDWR);
414 pthread_detach(tlsserverth);