Factorize SSL things in etpan
[claws.git] / src / etpan / etpan-ssl.c
1 /*
2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
3  * Copyright (C) 1999-2012 Colin Leroy <colin@colino.net> 
4  * and the Claws Mail team
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 3 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program. If not, see <http://www.gnu.org/licenses/>.
18  * 
19  */
20
21 #ifdef HAVE_CONFIG_H
22 #  include "config.h"
23 #include "claws-features.h"
24 #endif
25
26 #ifdef USE_GNUTLS
27 #ifdef HAVE_LIBETPAN
28 #include <libetpan/libetpan.h>
29 #include <gnutls/gnutls.h>
30 #include <gnutls/x509.h>
31 #include <stdlib.h>
32 #include <glib.h>
33 #include <glib/gi18n.h>
34 #include <errno.h>
35
36 #include "ssl_certificate.h"
37 #include "utils.h"
38 #include "log.h"
39 #include "prefs_account.h"
40
41 gboolean etpan_certificate_check(mailstream *stream, const char *host, gint port)
42 {
43         unsigned char *cert_der = NULL;
44         int len;
45         gnutls_x509_crt_t cert = NULL;
46         gnutls_datum_t tmp;
47
48         if (stream == NULL)
49                 return FALSE;
50
51         len = (int)mailstream_ssl_get_certificate(stream, &cert_der);
52
53         if (cert_der == NULL || len < 0) {
54                 g_warning("no cert presented.\n");
55                 return FALSE;
56         }
57
58         tmp.data = malloc(len);
59         memcpy(tmp.data, cert_der, len);
60         tmp.size = len;
61         gnutls_x509_crt_init(&cert);
62
63         free(cert_der);
64
65         if (gnutls_x509_crt_import(cert, &tmp, GNUTLS_X509_FMT_DER) < 0) {
66                 free(tmp.data);
67                 g_warning("IMAP: can't get cert\n");
68                 return FALSE;
69         } else if (ssl_certificate_check(cert, (guint)-1, host, port) == TRUE) {
70                 free(tmp.data);
71                 gnutls_x509_crt_deinit(cert);
72                 return TRUE;
73         } else {
74                 free(tmp.data);
75                 gnutls_x509_crt_deinit(cert);
76                 return FALSE;
77         }
78 }
79
80 void etpan_connect_ssl_context_cb(struct mailstream_ssl_context * ssl_context, void * data)
81 {
82         PrefsAccount *account = (PrefsAccount *)data;
83         const gchar *cert_path = NULL;
84         const gchar *password = NULL;
85         gnutls_x509_crt_t x509 = NULL;
86         gnutls_x509_privkey_t pkey = NULL;
87
88         if (account->in_ssl_client_cert_file && *account->in_ssl_client_cert_file)
89                 cert_path = account->in_ssl_client_cert_file;
90         if (account->in_ssl_client_cert_pass && *account->in_ssl_client_cert_pass)
91                 password = account->in_ssl_client_cert_pass;
92
93         if (mailstream_ssl_set_client_certificate_data(ssl_context, NULL, 0) < 0 ||
94             mailstream_ssl_set_client_private_key_data(ssl_context, NULL, 0) < 0)
95                 debug_print("Impossible to set the client certificate.\n");
96         x509 = ssl_certificate_get_x509_from_pem_file(cert_path);
97         pkey = ssl_certificate_get_pkey_from_pem_file(cert_path);
98         if (!(x509 && pkey)) {
99                 /* try pkcs12 format */
100                 ssl_certificate_get_x509_and_pkey_from_p12_file(cert_path, password, &x509, &pkey);
101         }
102         if (x509 && pkey) {
103                 unsigned char *x509_der = NULL, *pkey_der = NULL;
104                 size_t x509_len, pkey_len;
105
106                 x509_len = (size_t)gnutls_i2d_X509(x509, &x509_der);
107                 pkey_len = (size_t)gnutls_i2d_PrivateKey(pkey, &pkey_der);
108                 if (x509_len > 0 && pkey_len > 0) {
109                         if (mailstream_ssl_set_client_certificate_data(ssl_context, x509_der, x509_len) < 0 ||
110                             mailstream_ssl_set_client_private_key_data(ssl_context, pkey_der, pkey_len) < 0) 
111                                 log_error(LOG_PROTOCOL, _("Impossible to set the client certificate.\n"));
112                         g_free(x509_der);
113                         g_free(pkey_der);
114                 }
115                 gnutls_x509_crt_deinit(x509);
116                 gnutls_x509_privkey_deinit(pkey);
117         }
118 }
119
120 #endif /* USE_GNUTLS */
121 #endif /* HAVE_LIBETPAN */