2 ashd - A Sane HTTP Daemon
3 Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include <sys/socket.h>
24 #include <netinet/in.h>
25 #include <arpa/inet.h>
41 #include <gnutls/gnutls.h>
46 gnutls_certificate_credentials_t creds;
52 struct sockaddr_storage name;
53 gnutls_session_t sess;
57 static gnutls_dh_params_t dhparams;
59 static int tlsblock(int fd, gnutls_session_t sess, time_t to)
61 if(gnutls_record_get_direction(sess))
62 return(block(fd, EV_WRITE, to));
64 return(block(fd, EV_READ, to));
67 static ssize_t sslread(void *cookie, char *buf, size_t len)
69 struct sslconn *ssl = cookie;
73 while(ssl->in.d == 0) {
74 sizebuf(ssl->in, ssl->in.d + 1024);
75 ret = gnutls_record_recv(ssl->sess, ssl->in.b + ssl->in.d, ssl->in.s - ssl->in.d);
76 if((ret == GNUTLS_E_INTERRUPTED) || (ret == GNUTLS_E_AGAIN)) {
77 if(tlsblock(ssl->fd, ssl->sess, 60) == 0) {
90 xf = min(ssl->in.d, len);
91 memcpy(buf, ssl->in.b, xf);
92 memmove(ssl->in.b, ssl->in.b + xf, ssl->in.d -= xf);
96 static ssize_t sslwrite(void *cookie, const char *buf, size_t len)
98 struct sslconn *ssl = cookie;
104 ret = gnutls_record_send(ssl->sess, buf + off, len - off);
105 if((ret == GNUTLS_E_INTERRUPTED) || (ret == GNUTLS_E_AGAIN)) {
106 if(tlsblock(ssl->fd, ssl->sess, 60) == 0) {
126 static int sslclose(void *cookie)
131 static cookie_io_functions_t iofuns = {
137 static int initreq(struct conn *conn, struct hthead *req)
139 struct sslconn *ssl = conn->pdata;
142 if(ssl->name.ss_family == AF_INET) {
143 headappheader(req, "X-Ash-Address", inet_ntop(AF_INET, &((struct sockaddr_in *)&ssl->name)->sin_addr, nmbuf, sizeof(nmbuf)));
144 headappheader(req, "X-Ash-Port", sprintf3("%i", ntohs(((struct sockaddr_in *)&ssl->name)->sin_port)));
145 } else if(ssl->name.ss_family == AF_INET6) {
146 headappheader(req, "X-Ash-Address", inet_ntop(AF_INET6, &((struct sockaddr_in6 *)&ssl->name)->sin6_addr, nmbuf, sizeof(nmbuf)));
147 headappheader(req, "X-Ash-Port", sprintf3("%i", ntohs(((struct sockaddr_in6 *)&ssl->name)->sin6_port)));
149 headappheader(req, "X-Ash-Server-Port", sprintf3("%i", ssl->port->sport));
150 headappheader(req, "X-Ash-Protocol", "https");
154 static void servessl(struct muth *muth, va_list args)
157 vavar(struct sockaddr_storage, name);
158 vavar(struct sslport *, pd);
161 gnutls_session_t sess;
165 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
166 gnutls_init(&sess, GNUTLS_SERVER);
167 gnutls_set_default_priority(sess);
168 gnutls_credentials_set(sess, GNUTLS_CRD_CERTIFICATE, pd->creds);
169 gnutls_certificate_server_set_request(sess, GNUTLS_CERT_REQUEST);
170 gnutls_transport_set_ptr(sess, (gnutls_transport_ptr_t)(intptr_t)fd);
171 while((ret = gnutls_handshake(sess)) != 0) {
172 if((ret != GNUTLS_E_INTERRUPTED) && (ret != GNUTLS_E_AGAIN))
174 if(tlsblock(fd, sess, 60) <= 0)
177 memset(&conn, 0, sizeof(conn));
178 memset(&ssl, 0, sizeof(ssl));
180 conn.initreq = initreq;
186 in = fopencookie(&ssl, "r+", iofuns);
194 static void listenloop(struct muth *muth, va_list args)
196 vavar(struct sslport *, pd);
198 struct sockaddr_storage name;
202 namelen = sizeof(name);
203 block(pd->fd, EV_READ, 0);
204 ns = accept(pd->fd, (struct sockaddr *)&name, &namelen);
206 flog(LOG_ERR, "accept: %s", strerror(errno));
209 mustart(servessl, ns, name, pd);
217 static void init(void)
219 static int inited = 0;
225 if((ret = gnutls_global_init()) != 0) {
226 flog(LOG_ERR, "could not initialize GnuTLS: %s", gnutls_strerror(ret));
229 if(((ret = gnutls_dh_params_init(&dhparams)) != 0) ||
230 ((ret = gnutls_dh_params_generate2(dhparams, 2048)) != 0)) {
231 flog(LOG_ERR, "GnuTLS could not generate Diffie-Hellman parameters: %s", gnutls_strerror(ret));
236 void handlegnussl(int argc, char **argp, char **argv)
238 int i, ret, port, fd;
239 gnutls_certificate_credentials_t creds;
241 char *crtfile, *keyfile;
245 gnutls_certificate_allocate_credentials(&creds);
246 keyfile = crtfile = NULL;
247 for(i = 0; i < argc; i++) {
248 if(!strcmp(argp[i], "help")) {
249 printf("ssl handler parameters:\n");
250 printf("\tcert=CERT-FILE [mandatory]\n");
251 printf("\t\tThe name of the file to read the certificate from.\n");
252 printf("\tkey=KEY-FILE [same as CERT-FILE]\n");
253 printf("\t\tThe name of the file to read the private key from.\n");
254 printf("\ttrust=CA-FILE [no default]\n");
255 printf("\t\tThe name of a file to read trusted certificates from.\n");
256 printf("\t\tMay be given multiple times.\n");
257 printf("\tcrl=CRL-FILE [no default]\n");
258 printf("\t\tThe name of a file to read revocation lists from.\n");
259 printf("\t\tMay be given multiple times.\n");
260 printf("\tport=PORT [443]\n");
261 printf("\t\tThe TCP port to listen on.\n");
263 printf("\tAll X.509 data files must be PEM-encoded.\n");
265 } else if(!strcmp(argp[i], "cert")) {
267 } else if(!strcmp(argp[i], "key")) {
269 } else if(!strcmp(argp[i], "trust")) {
270 if((ret = gnutls_certificate_set_x509_trust_file(creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) {
271 flog(LOG_ERR, "ssl: could not load trust file `%s': %s", argv[i], gnutls_strerror(ret));
274 } else if(!strcmp(argp[i], "crl")) {
275 if((ret = gnutls_certificate_set_x509_crl_file(creds, argv[i], GNUTLS_X509_FMT_PEM)) != 0) {
276 flog(LOG_ERR, "ssl: could not load CRL file `%s': %s", argv[i], gnutls_strerror(ret));
279 } else if(!strcmp(argp[i], "port")) {
280 port = atoi(argv[i]);
282 flog(LOG_ERR, "unknown parameter `%s' to ssl handler", argp[i]);
286 if(crtfile == NULL) {
287 flog(LOG_ERR, "ssl: needs certificate file at the very least");
292 if((ret = gnutls_certificate_set_x509_key_file(creds, crtfile, keyfile, GNUTLS_X509_FMT_PEM)) != 0) {
293 flog(LOG_ERR, "ssl: could not load certificate or key: %s", gnutls_strerror(ret));
296 gnutls_certificate_set_dh_params(creds, dhparams);
297 if((fd = listensock6(port)) < 0) {
298 flog(LOG_ERR, "could not listen on IPv6 port (port %i): %s", port, strerror(errno));
305 mustart(listenloop, pd);
306 if((fd = listensock6(port)) < 0) {
307 if(errno != EADDRINUSE) {
308 flog(LOG_ERR, "could not listen on IPv6 port (port %i): %s", port, strerror(errno));
316 mustart(listenloop, pd);