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"
35 static SSLCertificate *ssl_certificate_new_lookup(X509 *x509_cert, gchar *host, gushort port, gboolean lookup);
37 static char * get_fqdn(char *host)
41 if (host == NULL || strlen(host) == 0)
44 hp = my_gethostbyname(host);
46 return g_strdup(host); /*caller should free*/
48 return g_strdup(hp->h_name);
51 char * readable_fingerprint(unsigned char *src, int len)
62 tmp2 = g_strdup_printf("%s:%02X", ret, src[i]);
64 tmp2 = g_strdup_printf("%02X", src[i]);
73 SSLCertificate *ssl_certificate_new(X509 *x509_cert, gchar *host, gushort port)
75 return ssl_certificate_new_lookup(x509_cert, host, port, TRUE);
78 static SSLCertificate *ssl_certificate_new_lookup(X509 *x509_cert, gchar *host, gushort port, gboolean lookup)
80 SSLCertificate *cert = g_new0(SSLCertificate, 1);
82 if (host == NULL || x509_cert == NULL) {
83 ssl_certificate_destroy(cert);
86 cert->x509_cert = X509_dup(x509_cert);
88 cert->host = get_fqdn(host);
90 cert->host = g_strdup(host);
95 static void ssl_certificate_save (SSLCertificate *cert)
100 file = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
101 "certs", G_DIR_SEPARATOR_S, NULL);
103 if (!is_dir_exist(file))
107 port = g_strdup_printf("%d", cert->port);
108 file = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
109 "certs", G_DIR_SEPARATOR_S,
110 cert->host, ".", port, ".cert", NULL);
113 fp = fopen(file, "wb");
116 debug_print("Can't save certificate !\n");
119 i2d_X509_fp(fp, cert->x509_cert);
125 char* ssl_certificate_to_string(SSLCertificate *cert)
128 char *issuer_commonname, *issuer_location, *issuer_organization;
129 char *subject_commonname, *subject_location, *subject_organization;
130 char *fingerprint, *sig_status;
132 unsigned char md[EVP_MAX_MD_SIZE];
135 if (X509_NAME_get_text_by_NID(X509_get_issuer_name(cert->x509_cert),
136 NID_commonName, buf, 100) >= 0)
137 issuer_commonname = g_strdup(buf);
139 issuer_commonname = g_strdup(_("<not in certificate>"));
140 if (X509_NAME_get_text_by_NID(X509_get_issuer_name(cert->x509_cert),
141 NID_localityName, buf, 100) >= 0) {
142 issuer_location = g_strdup(buf);
143 if (X509_NAME_get_text_by_NID(X509_get_issuer_name(cert->x509_cert),
144 NID_countryName, buf, 100) >= 0)
145 issuer_location = g_strconcat(issuer_location,", ",buf, NULL);
146 } else if (X509_NAME_get_text_by_NID(X509_get_issuer_name(cert->x509_cert),
147 NID_countryName, buf, 100) >= 0)
148 issuer_location = g_strdup(buf);
150 issuer_location = g_strdup(_("<not in certificate>"));
152 if (X509_NAME_get_text_by_NID(X509_get_issuer_name(cert->x509_cert),
153 NID_organizationName, buf, 100) >= 0)
154 issuer_organization = g_strdup(buf);
156 issuer_organization = g_strdup(_("<not in certificate>"));
159 if (X509_NAME_get_text_by_NID(X509_get_subject_name(cert->x509_cert),
160 NID_commonName, buf, 100) >= 0)
161 subject_commonname = g_strdup(buf);
163 subject_commonname = g_strdup(_("<not in certificate>"));
164 if (X509_NAME_get_text_by_NID(X509_get_subject_name(cert->x509_cert),
165 NID_localityName, buf, 100) >= 0) {
166 subject_location = g_strdup(buf);
167 if (X509_NAME_get_text_by_NID(X509_get_subject_name(cert->x509_cert),
168 NID_countryName, buf, 100) >= 0)
169 subject_location = g_strconcat(subject_location,", ",buf, NULL);
170 } else if (X509_NAME_get_text_by_NID(X509_get_subject_name(cert->x509_cert),
171 NID_countryName, buf, 100) >= 0)
172 subject_location = g_strdup(buf);
174 subject_location = g_strdup(_("<not in certificate>"));
176 if (X509_NAME_get_text_by_NID(X509_get_subject_name(cert->x509_cert),
177 NID_organizationName, buf, 100) >= 0)
178 subject_organization = g_strdup(buf);
180 subject_organization = g_strdup(_("<not in certificate>"));
183 X509_digest(cert->x509_cert, EVP_md5(), md, &n);
184 fingerprint = readable_fingerprint(md, (int)n);
187 sig_status = ssl_certificate_check_signer(cert->x509_cert);
189 ret = g_strdup_printf(_(" Owner: %s (%s) in %s\n Signed by: %s (%s) in %s\n Fingerprint: %s\n Signature status: %s"),
190 subject_commonname, subject_organization, subject_location,
191 issuer_commonname, issuer_organization, issuer_location,
193 (sig_status==NULL ? "correct":sig_status));
195 if (issuer_commonname)
196 g_free(issuer_commonname);
198 g_free(issuer_location);
199 if (issuer_organization)
200 g_free(issuer_organization);
201 if (subject_commonname)
202 g_free(subject_commonname);
203 if (subject_location)
204 g_free(subject_location);
205 if (subject_organization)
206 g_free(subject_organization);
214 void ssl_certificate_destroy(SSLCertificate *cert)
220 X509_free(cert->x509_cert);
227 void ssl_certificate_delete_from_disk(SSLCertificate *cert)
231 buf = g_strdup_printf("%d", cert->port);
232 file = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
233 "certs", G_DIR_SEPARATOR_S,
234 cert->host, ".", buf, ".cert", NULL);
240 SSLCertificate *ssl_certificate_find (gchar *host, gushort port)
242 return ssl_certificate_find_lookup (host, port, TRUE);
245 SSLCertificate *ssl_certificate_find_lookup (gchar *host, gushort port, gboolean lookup)
250 SSLCertificate *cert = NULL;
255 fqdn_host = get_fqdn(host);
257 fqdn_host = g_strdup(host);
259 buf = g_strdup_printf("%d", port);
260 file = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S,
261 "certs", G_DIR_SEPARATOR_S,
262 fqdn_host, ".", buf, ".cert", NULL);
265 fp = fopen(file, "rb");
273 if ((tmp_x509 = d2i_X509_fp(fp, 0)) != NULL) {
274 cert = ssl_certificate_new_lookup(tmp_x509, fqdn_host, port, lookup);
284 static gboolean ssl_certificate_compare (SSLCertificate *cert_a, SSLCertificate *cert_b)
286 if (cert_a == NULL || cert_b == NULL)
288 else if (!X509_cmp(cert_a->x509_cert, cert_b->x509_cert))
294 char *ssl_certificate_check_signer (X509 *cert)
296 X509_STORE_CTX store_ctx;
298 char *err_msg = NULL;
300 store = X509_STORE_new();
302 printf("Can't create X509_STORE\n");
305 if (!X509_STORE_set_default_paths(store)) {
306 X509_STORE_free (store);
307 return g_strdup(_("Can't load X509 default paths"));
310 X509_STORE_CTX_init (&store_ctx, store, cert, NULL);
312 if(!X509_verify_cert (&store_ctx)) {
313 err_msg = g_strdup(X509_verify_cert_error_string(
314 X509_STORE_CTX_get_error(&store_ctx)));
315 debug_print("Can't check signer: %s\n", err_msg);
316 X509_STORE_CTX_cleanup (&store_ctx);
317 X509_STORE_free (store);
321 X509_STORE_CTX_cleanup (&store_ctx);
322 X509_STORE_free (store);
326 gboolean ssl_certificate_check (X509 *x509_cert, gchar *host, gushort port)
328 SSLCertificate *current_cert = ssl_certificate_new(x509_cert, host, port);
329 SSLCertificate *known_cert;
330 SSLCertHookData cert_hook_data;
332 if (current_cert == NULL) {
333 debug_print("Buggy certificate !\n");
337 known_cert = ssl_certificate_find (host, port);
339 if (known_cert == NULL) {
340 gchar *err_msg, *cur_cert_str, *sig_status;
342 sig_status = ssl_certificate_check_signer(x509_cert);
344 #if 0 /* disabled pref for now */
345 if (sig_status == NULL && !prefs_common.ssl_ask_unknown_valid) {
346 /* trust and accept silently if hostnames match */
347 char *buf; /* don't free buf ! */
348 if (X509_NAME_get_text_by_NID(X509_get_subject_name(x509_cert),
349 NID_commonName, buf, 100) >= 0)
350 if (!strcmp(buf, current_cert->host)) {
352 ssl_certificate_save(current_cert);
353 ssl_certificate_destroy(current_cert);
360 cur_cert_str = ssl_certificate_to_string(current_cert);
362 err_msg = g_strdup_printf(_("%s presented an unknown SSL certificate:\n%s"),
365 g_free (cur_cert_str);
367 #if 0 /* disabled for now */
368 if (prefs_common.no_recv_err_panel) {
369 log_error(_("%s\n\nMail won't be retrieved on this account until you save the certificate.\n(Uncheck the \"%s\" preference).\n"),
371 _("Don't popup error dialog on receive error"));
376 cert_hook_data.cert = current_cert;
377 cert_hook_data.old_cert = NULL;
378 cert_hook_data.accept = FALSE;
380 hooks_invoke(SSLCERT_ASK_HOOKLIST, &cert_hook_data);
384 if (!cert_hook_data.accept) {
385 ssl_certificate_destroy(current_cert);
388 ssl_certificate_save(current_cert);
389 ssl_certificate_destroy(current_cert);
393 else if (!ssl_certificate_compare (current_cert, known_cert)) {
394 gchar *err_msg, *known_cert_str, *cur_cert_str;
396 known_cert_str = ssl_certificate_to_string(known_cert);
397 cur_cert_str = ssl_certificate_to_string(current_cert);
398 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."),
402 g_free (cur_cert_str);
403 g_free (known_cert_str);
406 if (prefs_common.no_recv_err_panel) {
407 log_error(_("%s\n\nMail won't be retrieved on this account until you save the certificate.\n(Uncheck the \"%s\" preference).\n"),
409 _("Don't popup error dialog on receive error"));
414 cert_hook_data.cert = current_cert;
415 cert_hook_data.old_cert = known_cert;
416 cert_hook_data.accept = FALSE;
418 hooks_invoke(SSLCERT_ASK_HOOKLIST, &cert_hook_data);
422 if (!cert_hook_data.accept) {
423 ssl_certificate_destroy(current_cert);
424 ssl_certificate_destroy(known_cert);
427 ssl_certificate_save(current_cert);
428 ssl_certificate_destroy(current_cert);
429 ssl_certificate_destroy(known_cert);
434 ssl_certificate_destroy(current_cert);
435 ssl_certificate_destroy(known_cert);
439 #endif /* USE_OPENSSL */