2 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 1999-2007 Hiroyuki Yamamoto and the Claws Mail team
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/>.
28 #include <glib/gi18n.h>
33 #include "ssl_certificate.h"
37 #include <libetpan/mailstream_ssl.h>
45 typedef struct _thread_data {
51 static int gnutls_client_cert_cb(gnutls_session session,
52 const gnutls_datum *req_ca_rdn, int nreqs,
53 const gnutls_pk_algorithm *sign_algos,
54 int sign_algos_length, gnutls_retr_st *st)
56 SSLClientCertHookData hookdata;
57 SockInfo *sockinfo = (SockInfo *)gnutls_session_get_ptr(session);
58 gnutls_certificate_type type = gnutls_certificate_type_get(session);
60 gnutls_x509_privkey key;
64 hookdata.account = sockinfo->account;
65 hookdata.cert_path = NULL;
66 hookdata.password = NULL;
67 hookdata.is_smtp = sockinfo->is_smtp;
68 hooks_invoke(SSLCERT_GET_CLIENT_CERT_HOOKLIST, &hookdata);
70 if (hookdata.cert_path == NULL)
73 sockinfo->client_crt = ssl_certificate_get_x509_from_pem_file(hookdata.cert_path);
74 sockinfo->client_key = ssl_certificate_get_pkey_from_pem_file(hookdata.cert_path);
75 if (!(sockinfo->client_crt && sockinfo->client_key)) {
76 /* try pkcs12 format */
77 ssl_certificate_get_x509_and_pkey_from_p12_file(hookdata.cert_path, hookdata.password,
79 sockinfo->client_crt = crt;
80 sockinfo->client_key = key;
83 if (type == GNUTLS_CRT_X509 && sockinfo->client_crt && sockinfo->client_key) {
86 st->cert.x509 = &(sockinfo->client_crt);
87 st->key.x509 = sockinfo->client_key;
94 const gchar *claws_ssl_get_cert_file(void)
96 const char *cert_files[]={
97 "/etc/pki/tls/certs/ca-bundle.crt",
98 "/etc/certs/ca-bundle.crt",
99 "/usr/share/ssl/certs/ca-bundle.crt",
100 "/etc/ssl/certs/ca-certificates.crt",
101 "/usr/local/ssl/certs/ca-bundle.crt",
102 "/etc/apache/ssl.crt/ca-bundle.crt",
103 "/usr/share/curl/curl-ca-bundle.crt",
104 "/usr/share/curl/curl-ca-bundle.crt",
105 "/usr/lib/ssl/cert.pem",
109 if (g_getenv("SSL_CERT_FILE"))
110 return g_getenv("SSL_CERT_FILE");
112 for (i = 0; cert_files[i]; i++) {
113 if (is_file_exist(cert_files[i]))
114 return cert_files[i];
118 return "put_what_s_needed_here";
122 const gchar *claws_ssl_get_cert_dir(void)
124 const char *cert_dirs[]={
125 "/etc/pki/tls/certs",
127 "/usr/share/ssl/certs",
129 "/usr/local/ssl/certs",
130 "/etc/apache/ssl.crt",
132 "/usr/lib/ssl/certs",
136 if (g_getenv("SSL_CERT_DIR"))
137 return g_getenv("SSL_CERT_DIR");
139 for (i = 0; cert_dirs[i]; i++) {
140 if (is_dir_exist(cert_dirs[i]))
145 return "put_what_s_needed_here";
152 mailstream_gnutls_init_not_required();
154 gnutls_global_init();
159 gnutls_global_deinit();
163 static void *SSL_connect_thread(void *data)
165 thread_data *td = (thread_data *)data;
168 pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
169 pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
172 result = gnutls_handshake(td->ssl);
173 } while (result == GNUTLS_E_AGAIN || result == GNUTLS_E_INTERRUPTED);
175 td->done = TRUE; /* let the caller thread join() */
176 return GINT_TO_POINTER(result);
180 static gint SSL_connect_nb(gnutls_session ssl)
184 thread_data *td = g_new0(thread_data, 1);
188 time_t start_time = time(NULL);
189 gboolean killed = FALSE;
194 /* try to create a thread to initialize the SSL connection,
195 * fallback to blocking method in case of problem
197 if (pthread_attr_init(&pta) != 0 ||
198 pthread_attr_setdetachstate(&pta, PTHREAD_CREATE_JOINABLE) != 0 ||
199 pthread_create(&pt, &pta, SSL_connect_thread, td) != 0) {
201 result = gnutls_handshake(td->ssl);
202 } while (result == GNUTLS_E_AGAIN || result == GNUTLS_E_INTERRUPTED);
205 debug_print("waiting for SSL_connect thread...\n");
207 /* don't let the interface freeze while waiting */
209 if (time(NULL) - start_time > 30) {
216 /* get the thread's return value and clean its resources */
217 pthread_join(pt, &res);
221 res = GINT_TO_POINTER(-1);
223 debug_print("SSL_connect thread returned %d\n",
224 GPOINTER_TO_INT(res));
226 return GPOINTER_TO_INT(res);
227 #else /* USE_PTHREAD */
229 result = gnutls_handshake(ssl);
230 } while (result == GNUTLS_E_AGAIN || result == GNUTLS_E_INTERRUPTED);
234 gboolean ssl_init_socket(SockInfo *sockinfo)
236 return ssl_init_socket_with_method(sockinfo, SSL_METHOD_SSLv23);
239 gboolean ssl_init_socket_with_method(SockInfo *sockinfo, SSLMethod method)
241 gnutls_session session;
243 const int cipher_prio[] = { GNUTLS_CIPHER_AES_128_CBC,
244 GNUTLS_CIPHER_3DES_CBC,
245 GNUTLS_CIPHER_AES_256_CBC,
246 GNUTLS_CIPHER_ARCFOUR_128, 0 };
247 const int kx_prio[] = { GNUTLS_KX_DHE_RSA,
249 GNUTLS_KX_DHE_DSS, 0 };
250 const int mac_prio[] = { GNUTLS_MAC_SHA1,
252 const int proto_prio[] = { GNUTLS_TLS1,
254 const gnutls_datum *raw_cert_list;
255 unsigned int raw_cert_list_length;
256 gnutls_x509_crt cert = NULL;
258 gnutls_certificate_credentials_t xcred;
260 if (gnutls_certificate_allocate_credentials (&xcred) != 0)
263 r = gnutls_init(&session, GNUTLS_CLIENT);
264 if (session == NULL || r != 0)
267 gnutls_set_default_priority(session);
268 gnutls_protocol_set_priority (session, proto_prio);
269 gnutls_cipher_set_priority (session, cipher_prio);
270 gnutls_kx_set_priority (session, kx_prio);
271 gnutls_mac_set_priority (session, mac_prio);
273 gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, xcred);
275 if (claws_ssl_get_cert_file()) {
276 r = gnutls_certificate_set_x509_trust_file(xcred, claws_ssl_get_cert_file(), GNUTLS_X509_FMT_PEM);
278 g_warning("Can't read SSL_CERT_FILE %s: %s\n",
279 claws_ssl_get_cert_file(),
282 debug_print("Can't find SSL ca-certificates file\n");
284 gnutls_certificate_set_verify_flags (xcred, GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT);
286 gnutls_transport_set_ptr(session, (gnutls_transport_ptr) sockinfo->sock);
287 gnutls_session_set_ptr(session, sockinfo);
288 gnutls_certificate_client_set_retrieve_function(xcred, gnutls_client_cert_cb);
290 gnutls_dh_set_prime_bits(session, 512);
292 if ((r = SSL_connect_nb(session)) < 0) {
293 g_warning("SSL connection failed (%s)", gnutls_strerror(r));
294 gnutls_certificate_free_credentials(xcred);
295 gnutls_deinit(session);
299 /* Get server's certificate (note: beware of dynamic allocation) */
300 raw_cert_list = gnutls_certificate_get_peers(session, &raw_cert_list_length);
303 || gnutls_certificate_type_get(session) != GNUTLS_CRT_X509
304 || (r = gnutls_x509_crt_init(&cert)) < 0
305 || (r = gnutls_x509_crt_import(cert, &raw_cert_list[0], GNUTLS_X509_FMT_DER)) < 0) {
306 g_warning("cert get failure: %d %s\n", r, gnutls_strerror(r));
307 gnutls_certificate_free_credentials(xcred);
308 gnutls_deinit(session);
312 r = gnutls_certificate_verify_peers2(session, &status);
314 if (!ssl_certificate_check(cert, status, sockinfo->canonical_name, sockinfo->hostname, sockinfo->port)) {
315 gnutls_x509_crt_deinit(cert);
316 gnutls_certificate_free_credentials(xcred);
317 gnutls_deinit(session);
321 gnutls_x509_crt_deinit(cert);
323 sockinfo->ssl = session;
324 sockinfo->xcred = xcred;
328 void ssl_done_socket(SockInfo *sockinfo)
330 if (sockinfo && sockinfo->ssl) {
331 gnutls_certificate_free_credentials(sockinfo->xcred);
332 gnutls_deinit(sockinfo->ssl);
333 if (sockinfo->client_crt)
334 gnutls_x509_crt_deinit(sockinfo->client_crt);
335 if (sockinfo->client_key)
336 gnutls_x509_privkey_deinit(sockinfo->client_key);
337 sockinfo->client_key = NULL;
338 sockinfo->client_crt = NULL;
339 sockinfo->ssl = NULL;
343 #endif /* USE_GNUTLS */