Fixed ashd.wsgidir to make wmain work as intended.
[ashd.git] / src / ssl-gnutls.c
CommitLineData
6ca53b2e
FT
1/*
2 ashd - A Sane HTTP Daemon
3 Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com>
4
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.
9
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.
14
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/>.
17*/
18
19#include <stdlib.h>
20#include <unistd.h>
21#include <string.h>
22#include <fcntl.h>
23#include <sys/socket.h>
24#include <netinet/in.h>
25#include <arpa/inet.h>
26#include <errno.h>
27
28#ifdef HAVE_CONFIG_H
29#include <config.h>
30#endif
31#include <utils.h>
32#include <mt.h>
33#include <mtio.h>
34#include <req.h>
35#include <log.h>
36
37#include "htparser.h"
38
39#ifdef HAVE_GNUTLS
40
41#include <gnutls/gnutls.h>
42
43struct sslport {
44 int fd;
45 int sport;
46 gnutls_certificate_credentials_t creds;
47};
48
49struct sslconn {
50 int fd;
51 struct sslport *port;
52 struct sockaddr_storage name;
53 gnutls_session_t sess;
54 struct charbuf in;
55};
56
57static gnutls_dh_params_t dhparams;
58
59static int tlsblock(int fd, gnutls_session_t sess, time_t to)
60{
61 if(gnutls_record_get_direction(sess))
62 return(block(fd, EV_WRITE, to));
63 else
64 return(block(fd, EV_READ, to));
65}
66
67static ssize_t sslread(void *cookie, char *buf, size_t len)
68{
69 struct sslconn *ssl = cookie;
70 ssize_t xf;
71 int ret;
72
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) {
78 errno = ETIMEDOUT;
79 return(-1);
80 }
81 } else if(ret < 0) {
82 errno = EIO;
83 return(-1);
84 } else if(ret == 0) {
85 return(0);
86 } else {
87 ssl->in.d += ret;
88 }
89 }
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);
93 return(xf);
94}
95
96static ssize_t sslwrite(void *cookie, const char *buf, size_t len)
97{
98 struct sslconn *ssl = cookie;
99 int ret;
100 size_t off;
101
102 off = 0;
103 while(off < len) {
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) {
107 if(off == 0) {
108 errno = ETIMEDOUT;
109 return(-1);
110 }
111 return(off);
112 }
113 } else if(ret < 0) {
114 if(off == 0) {
115 errno = EIO;
116 return(-1);
117 }
118 return(off);
119 } else {
120 off += ret;
121 }
122 }
123 return(off);
124}
125
126static int sslclose(void *cookie)
127{
128 return(0);
129}
130
131static cookie_io_functions_t iofuns = {
132 .read = sslread,
133 .write = sslwrite,
134 .close = sslclose,
135};
136
137static int initreq(struct conn *conn, struct hthead *req)
138{
139 struct sslconn *ssl = conn->pdata;
140 char nmbuf[256];
141
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)));
148 }
149 headappheader(req, "X-Ash-Server-Port", sprintf3("%i", ssl->port->sport));
150 headappheader(req, "X-Ash-Protocol", "https");
151 return(0);
152}
153
154static void servessl(struct muth *muth, va_list args)
155{
156 vavar(int, fd);
157 vavar(struct sockaddr_storage, name);
158 vavar(struct sslport *, pd);
159 struct conn conn;
160 struct sslconn ssl;
161 gnutls_session_t sess;
162 int ret;
163 FILE *in;
164
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))
173 goto out;
174 if(tlsblock(fd, sess, 60) <= 0)
175 goto out;
176 }
177 memset(&conn, 0, sizeof(conn));
178 memset(&ssl, 0, sizeof(ssl));
179 conn.pdata = &ssl;
180 conn.initreq = initreq;
181 ssl.fd = fd;
182 ssl.port = pd;
183 ssl.name = name;
184 ssl.sess = sess;
185 bufinit(ssl.in);
186 in = fopencookie(&ssl, "r+", iofuns);
187 serve(in, &conn);
188
189out:
190 gnutls_deinit(sess);
191 close(fd);
192}
193
194static void listenloop(struct muth *muth, va_list args)
195{
196 vavar(struct sslport *, pd);
197 int ns;
198 struct sockaddr_storage name;
199 socklen_t namelen;
200
201 while(1) {
202 namelen = sizeof(name);
203 block(pd->fd, EV_READ, 0);
204 ns = accept(pd->fd, (struct sockaddr *)&name, &namelen);
205 if(ns < 0) {
206 flog(LOG_ERR, "accept: %s", strerror(errno));
207 goto out;
208 }
209 mustart(servessl, ns, name, pd);
210 }
211
212out:
213 close(pd->fd);
214 free(pd);
215}
216
217static void init(void)
218{
219 static int inited = 0;
220 int ret;
221
222 if(inited)
223 return;
224 inited = 1;
225 if((ret = gnutls_global_init()) != 0) {
226 flog(LOG_ERR, "could not initialize GnuTLS: %s", gnutls_strerror(ret));
227 exit(1);
228 }
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));
232 exit(1);
233 }
234}
235
236void handlegnussl(int argc, char **argp, char **argv)
237{
238 int i, ret, port, fd;
239 gnutls_certificate_credentials_t creds;
240 struct sslport *pd;
241 char *crtfile, *keyfile;
242
243 init();
244 port = 443;
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");
262 printf("\n");
263 printf("\tAll X.509 data files must be PEM-encoded.\n");
264 exit(0);
265 } else if(!strcmp(argp[i], "cert")) {
266 crtfile = argv[i];
267 } else if(!strcmp(argp[i], "key")) {
268 keyfile = argv[i];
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));
272 exit(1);
273 }
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));
277 exit(1);
278 }
279 } else if(!strcmp(argp[i], "port")) {
280 port = atoi(argv[i]);
281 } else {
282 flog(LOG_ERR, "unknown parameter `%s' to ssl handler", argp[i]);
283 exit(1);
284 }
285 }
286 if(crtfile == NULL) {
287 flog(LOG_ERR, "ssl: needs certificate file at the very least");
288 exit(1);
289 }
290 if(keyfile == NULL)
291 keyfile = crtfile;
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));
294 exit(1);
295 }
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));
299 exit(1);
300 }
301 omalloc(pd);
302 pd->fd = fd;
303 pd->sport = port;
304 pd->creds = creds;
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));
309 exit(1);
310 }
311 } else {
312 omalloc(pd);
313 pd->fd = fd;
314 pd->sport = port;
315 pd->creds = creds;
316 mustart(listenloop, pd);
317 }
318}
319
320#endif