src/ssl.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2002 Hiroyuki Yamamoto
   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 2 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, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #if USE_SSL
  25
  26 #include "defs.h"
  27
  28 #include <glib.h>
  29
  30 #include "intl.h"
  31 #include "utils.h"
  32 #include "ssl.h"
  33
  34 static SSL_CTX *ssl_ctx_SSLv23;
  35 static SSL_CTX *ssl_ctx_TLSv1;
  36
  37 void ssl_init(void)
  38 {
  39         SSL_library_init();
  40         SSL_load_error_strings();
  41
  42         ssl_ctx_SSLv23 = SSL_CTX_new(SSLv23_client_method());
  43         if (ssl_ctx_SSLv23 == NULL) {
  44                 debug_print(_("SSLv23 not available\n"));
  45         } else {
  46                 debug_print(_("SSLv23 available\n"));
  47         }
  48
  49         ssl_ctx_TLSv1 = SSL_CTX_new(TLSv1_client_method());
  50         if (ssl_ctx_TLSv1 == NULL) {
  51                 debug_print(_("TLSv1 not available\n"));
  52         } else {
  53                 debug_print(_("TLSv1 available\n"));
  54         }
  55 }
  56
  57 void ssl_done(void)
  58 {
  59         if (ssl_ctx_SSLv23) {
  60                 SSL_CTX_free(ssl_ctx_SSLv23);
  61         }
  62
  63         if (ssl_ctx_TLSv1) {
  64                 SSL_CTX_free(ssl_ctx_TLSv1);
  65         }
  66 }
  67
  68 gboolean ssl_init_socket(SockInfo *sockinfo)
  69 {
  70         return ssl_init_socket_with_method(sockinfo, SSL_METHOD_SSLv23);
  71 }
  72
  73 gboolean ssl_init_socket_with_method(SockInfo *sockinfo, SSLMethod method)
  74 {
  75         X509 *server_cert;
  76         gint ret;
  77
  78         switch (method) {
  79         case SSL_METHOD_SSLv23:
  80                 if (!ssl_ctx_SSLv23) {
  81                         log_warning(_("SSL method not available\n"));
  82                         return FALSE;
  83                 }
  84                 sockinfo->ssl = SSL_new(ssl_ctx_SSLv23);
  85                 break;
  86         case SSL_METHOD_TLSv1:
  87                 if (!ssl_ctx_TLSv1) {
  88                         log_warning(_("SSL method not available\n"));
  89                         return FALSE;
  90                 }
  91                 sockinfo->ssl = SSL_new(ssl_ctx_TLSv1);
  92                 break;
  93         default:
  94                 log_warning(_("Unknown SSL method *PROGRAM BUG*\n"));
  95                 return FALSE;
  96                 break;
  97         }
  98
  99         if (sockinfo->ssl == NULL) {
 100                 log_warning(_("Error creating ssl context\n"));
 101                 return FALSE;
 102         }
 103
 104         SSL_set_fd(sockinfo->ssl, sockinfo->sock);
 105         if ((ret = SSL_connect(sockinfo->ssl)) == -1) {
 106                 log_warning(_("SSL connect failed (%s)\n"),
 107                             ERR_error_string(ERR_get_error(), NULL));
 108                 return FALSE;
 109         }
 110
 111         /* Get the cipher */
 112
 113         log_print(_("SSL connection using %s\n"), SSL_get_cipher(sockinfo->ssl));
 114
 115         /* Get server's certificate (note: beware of dynamic allocation) */
 116
 117         if ((server_cert = SSL_get_peer_certificate(sockinfo->ssl)) != NULL) {
 118                 gchar *str;
 119
 120                 log_print(_("Server certificate:\n"));
 121
 122                 if ((str = X509_NAME_oneline(X509_get_subject_name(server_cert), 0, 0)) != NULL) {
 123                         log_print(_("  Subject: %s\n"), str);
 124                         free(str);
 125                 }
 126
 127                 if ((str = X509_NAME_oneline(X509_get_issuer_name(server_cert), 0, 0)) != NULL) {
 128                         log_print(_("  Issuer: %s\n"), str);
 129                         free(str);
 130                 }
 131
 132                 X509_free(server_cert);
 133         }
 134
 135         return TRUE;
 136 }
 137
 138 void ssl_done_socket(SockInfo *sockinfo)
 139 {
 140         if (sockinfo->ssl) {
 141                 SSL_free(sockinfo->ssl);
 142         }
 143 }
 144
 145 #endif /* USE_SSL */