2 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 1999-2001 Hiroyuki Yamamoto
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 2 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, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 #include <openssl/ssl.h>
28 #include "ssl_certificate.h"
29 #include "alertpanel.h"
32 #include "prefs_common.h"
34 static void ssl_certificate_destroy(SSLCertificate *cert);
35 static char *ssl_certificate_check_signer (X509 *cert);
37 static char * readable_fingerprint(unsigned char *src, int len)
48 tmp2 = g_strdup_printf("%s:%02X", ret, src[i]);
50 tmp2 = g_strdup_printf("%02X", src[i]);
59 SSLCertificate *ssl_certificate_new(X509 *x509_cert, gchar *host, gushort port)
61 SSLCertificate *cert = g_new0(SSLCertificate, 1);
63 if (host == NULL || x509_cert == NULL) {
64 ssl_certificate_destroy(cert);
68 cert->x509_cert = X509_dup(x509_cert);
69 cert->host = g_strdup(host);
74 static void ssl_certificate_save (SSLCertificate *cert)
79 file = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
80 "certs", G_DIR_SEPARATOR_S, NULL);
82 if (!is_dir_exist(file))
86 port = g_strdup_printf("%d", cert->port);
87 file = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
88 "certs", G_DIR_SEPARATOR_S,
89 cert->host, ".", port, ".cert", NULL);
92 fp = fopen(file, "w");
95 alertpanel_error(_("Can't save certificate !"));
98 i2d_X509_fp(fp, cert->x509_cert);
104 static char* ssl_certificate_to_string(SSLCertificate *cert)
107 char *issuer_commonname, *issuer_location, *issuer_organization;
108 char *subject_commonname, *subject_location, *subject_organization;
109 char *fingerprint, *sig_status;
111 unsigned char md[EVP_MAX_MD_SIZE];
114 X509_NAME_get_text_by_NID(X509_get_issuer_name(cert->x509_cert),
115 NID_commonName, buf, 100);
116 issuer_commonname = g_strdup(buf);
117 X509_NAME_get_text_by_NID(X509_get_issuer_name(cert->x509_cert),
118 NID_localityName, buf, 100);
119 issuer_location = g_strdup(buf);
120 X509_NAME_get_text_by_NID(X509_get_issuer_name(cert->x509_cert),
121 NID_countryName, buf, 100);
122 issuer_location = g_strconcat(issuer_location,", ",buf, NULL);
123 X509_NAME_get_text_by_NID(X509_get_issuer_name(cert->x509_cert),
124 NID_organizationName, buf, 100);
125 issuer_organization = g_strdup(buf);
128 X509_NAME_get_text_by_NID(X509_get_subject_name(cert->x509_cert),
129 NID_commonName, buf, 100);
130 subject_commonname = g_strdup(buf);
131 X509_NAME_get_text_by_NID(X509_get_subject_name(cert->x509_cert),
132 NID_localityName, buf, 100);
133 subject_location = g_strdup(buf);
134 X509_NAME_get_text_by_NID(X509_get_subject_name(cert->x509_cert),
135 NID_countryName, buf, 100);
136 subject_location = g_strconcat(subject_location,", ",buf, NULL);
137 X509_NAME_get_text_by_NID(X509_get_subject_name(cert->x509_cert),
138 NID_organizationName, buf, 100);
139 subject_organization = g_strdup(buf);
142 X509_digest(cert->x509_cert, EVP_md5(), md, &n);
143 fingerprint = readable_fingerprint(md, (int)n);
146 sig_status = ssl_certificate_check_signer(cert->x509_cert);
148 ret = g_strdup_printf(_(" Owner: %s (%s) in %s\n Signed by: %s (%s) in %s\n Fingerprint: %s\n Signature status: %s"),
149 subject_commonname, subject_organization, subject_location,
150 issuer_commonname, issuer_organization, issuer_location,
152 (sig_status==NULL ? "correct":sig_status));
154 if (issuer_commonname)
155 g_free(issuer_commonname);
157 g_free(issuer_location);
158 if (issuer_organization)
159 g_free(issuer_organization);
160 if (subject_commonname)
161 g_free(subject_commonname);
162 if (subject_location)
163 g_free(subject_location);
164 if (subject_organization)
165 g_free(subject_organization);
173 void ssl_certificate_destroy(SSLCertificate *cert)
175 g_return_if_fail(cert != NULL);
177 X509_free(cert->x509_cert);
184 static SSLCertificate *ssl_certificate_find (gchar *host, gushort port)
188 SSLCertificate *cert = NULL;
192 buf = g_strdup_printf("%d", port);
193 file = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
194 "certs", G_DIR_SEPARATOR_S,
195 host, ".", buf, ".cert", NULL);
198 fp = fopen(file, "r");
205 if ((tmp_x509 = d2i_X509_fp(fp, 0)) != NULL) {
206 cert = ssl_certificate_new(tmp_x509, host, port);
215 static gboolean ssl_certificate_compare (SSLCertificate *cert_a, SSLCertificate *cert_b)
217 if (cert_a == NULL || cert_b == NULL)
219 else if (!X509_cmp(cert_a->x509_cert, cert_b->x509_cert))
225 static char *ssl_certificate_check_signer (X509 *cert)
227 X509_STORE_CTX store_ctx;
230 char *cert_file = NULL;
231 char *err_msg = NULL;
233 store = X509_STORE_new();
235 printf("Can't create X509_STORE\n");
238 if (X509_STORE_set_default_paths(store))
240 if (X509_STORE_load_locations(store, cert_file, NULL))
244 X509_STORE_free (store);
245 return g_strdup(_("Can't load X509 default paths"));
248 X509_STORE_CTX_init (&store_ctx, store, cert, NULL);
249 ok = X509_verify_cert (&store_ctx);
252 err_msg = g_strdup(X509_verify_cert_error_string(
253 X509_STORE_CTX_get_error(&store_ctx)));
254 debug_print("Can't check signer: %s\n", err_msg);
255 X509_STORE_CTX_cleanup (&store_ctx);
256 X509_STORE_free (store);
260 X509_STORE_CTX_cleanup (&store_ctx);
261 X509_STORE_free (store);
265 gboolean ssl_certificate_check (X509 *x509_cert, gchar *host, gushort port)
267 SSLCertificate *current_cert = ssl_certificate_new(x509_cert, host, port);
268 SSLCertificate *known_cert;
270 if (current_cert == NULL) {
271 debug_print("Buggy certificate !\n");
275 known_cert = ssl_certificate_find (host, port);
277 if (known_cert == NULL) {
279 gchar *err_msg, *cur_cert_str;
281 cur_cert_str = ssl_certificate_to_string(current_cert);
283 err_msg = g_strdup_printf(_("%s presented an unknown SSL certificate:\n%s"),
286 g_free (cur_cert_str);
288 if (prefs_common.no_recv_err_panel) {
289 log_error(_("%s\n\nMail won't be retrieved on this account until you save the certificate.\n(Uncheck the \"%s\" preference).\n"),
291 _("Don't popup error dialog on receive error"));
296 val = alertpanel(_("Warning"),
298 _("Accept and save"), _("Cancel connection"), NULL);
302 case G_ALERTALTERNATE:
303 ssl_certificate_destroy(current_cert);
306 ssl_certificate_save(current_cert);
307 ssl_certificate_destroy(current_cert);
311 else if (!ssl_certificate_compare (current_cert, known_cert)) {
313 gchar *err_msg, *known_cert_str, *cur_cert_str, *sig_status;
315 sig_status = ssl_certificate_check_signer(x509_cert);
317 known_cert_str = ssl_certificate_to_string(known_cert);
318 cur_cert_str = ssl_certificate_to_string(current_cert);
319 err_msg = g_strdup_printf(_("%s's SSL certificate changed !\nWe have saved this one:\n%s\n\nIt is now:\n%s\n\nThis could mean the server answering is not the known one."),
323 g_free (cur_cert_str);
324 g_free (known_cert_str);
328 if (prefs_common.no_recv_err_panel) {
329 log_error(_("%s\n\nMail won't be retrieved on this account until you save the certificate.\n(Uncheck the \"%s\" preference).\n"),
331 _("Don't popup error dialog on receive error"));
336 val = alertpanel(_("Warning"),
338 _("Accept and save"), _("Cancel connection"), NULL);
342 case G_ALERTALTERNATE:
343 ssl_certificate_destroy(current_cert);
344 ssl_certificate_destroy(known_cert);
347 ssl_certificate_save(current_cert);
348 ssl_certificate_destroy(current_cert);
349 ssl_certificate_destroy(known_cert);
354 ssl_certificate_destroy(current_cert);
355 ssl_certificate_destroy(known_cert);