camel/camel.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /*
   3  *  Authors: Jeffrey Stedfast <fejj@ximian.com>
   4  *           Bertrand Guiheneuf <bertrand@helixcode.com>
   5  *
   6  *  Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU Lesser General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU Lesser General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU Lesser General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21  *
  22  */
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <signal.h>
  29
  30 #ifdef HAVE_NSS
  31 #include <nspr.h>
  32 #include <prthread.h>
  33 #include "nss.h"      /* Don't use <> here or it will include the system nss.h instead */
  34 #include <ssl.h>
  35 #endif /* HAVE_NSS */
  36
  37 #include <glib/gi18n-lib.h>
  38
  39 #include "camel.h"
  40 #include "camel-certdb.h"
  41 #include "camel-debug.h"
  42 #include "camel-provider.h"
  43 #include "camel-win32.h"
  44
  45 #ifdef HAVE_NSS
  46 /* To protect NSS initialization and shutdown. This prevents
  47    concurrent calls to shutdown() and init() by different threads */
  48 PRLock *nss_initlock = NULL;
  49
  50 /* Whether or not Camel has initialized the NSS library. We cannot
  51    unconditionally call NSS_Shutdown() if NSS was initialized by other
  52    library before. This boolean ensures that we only perform a cleanup
  53    if and only if Camel is the one that previously initialized NSS */
  54 volatile gboolean nss_initialized = FALSE;
  55 #endif
  56
  57 static gint initialised = FALSE;
  58
  59 gint camel_application_is_exiting = FALSE;
  60
  61 gint
  62 camel_init (const gchar *configdir, gboolean nss_init)
  63 {
  64         CamelCertDB *certdb;
  65         gchar *path;
  66
  67         if (initialised)
  68                 return 0;
  69
  70         bindtextdomain (GETTEXT_PACKAGE, EVOLUTION_LOCALEDIR);
  71         bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
  72
  73         camel_debug_init();
  74
  75 #ifdef HAVE_NSS
  76         if (nss_init) {
  77                 gchar *nss_configdir;
  78                 PRUint16 indx;
  79
  80                 if (nss_initlock == NULL) {
  81                         PR_Init(PR_SYSTEM_THREAD, PR_PRIORITY_NORMAL, 10);
  82                         nss_initlock = PR_NewLock();
  83                 }
  84                 PR_Lock (nss_initlock);
  85
  86 #ifndef G_OS_WIN32
  87                 nss_configdir = g_strdup (configdir);
  88 #else
  89                 nss_configdir = g_win32_locale_filename_from_utf8 (configdir);
  90 #endif
  91
  92                 if (!NSS_IsInitialized()) {
  93                         nss_initialized = 1;
  94
  95                         if (NSS_InitReadWrite (nss_configdir) == SECFailure) {
  96                                 /* fall back on using volatile dbs? */
  97                                 if (NSS_NoDB_Init (nss_configdir) == SECFailure) {
  98                                         g_free (nss_configdir);
  99                                         g_warning ("Failed to initialize NSS");
 100                                         nss_initialized = 0;
 101                                         PR_Unlock(nss_initlock);
 102                                         return -1;
 103                                 }
 104                         }
 105                 }
 106
 107                 NSS_SetDomesticPolicy ();
 108
 109                 PR_Unlock(nss_initlock);
 110
 111                 /* we must enable all ciphersuites */
 112                 for (indx = 0; indx < SSL_NumImplementedCiphers; indx++) {
 113                         if (!SSL_IS_SSL2_CIPHER(SSL_ImplementedCiphers[indx]))
 114                                 SSL_CipherPrefSetDefault (SSL_ImplementedCiphers[indx], PR_TRUE);
 115                 }
 116
 117                 SSL_OptionSetDefault (SSL_ENABLE_SSL2, PR_TRUE);
 118                 SSL_OptionSetDefault (SSL_ENABLE_SSL3, PR_TRUE);
 119                 SSL_OptionSetDefault (SSL_ENABLE_TLS, PR_TRUE);
 120                 SSL_OptionSetDefault (SSL_V2_COMPATIBLE_HELLO, PR_TRUE /* maybe? */);
 121
 122                 g_free (nss_configdir);
 123         }
 124 #endif /* HAVE_NSS */
 125
 126         path = g_strdup_printf ("%s/camel-cert.db", configdir);
 127         certdb = camel_certdb_new ();
 128         camel_certdb_set_filename (certdb, path);
 129         g_free (path);
 130
 131         /* if we fail to load, who cares? it'll just be a volatile certdb */
 132         camel_certdb_load (certdb);
 133
 134         /* set this certdb as the default db */
 135         camel_certdb_set_default (certdb);
 136
 137         g_object_unref (certdb);
 138
 139         initialised = TRUE;
 140
 141         return 0;
 142 }
 143
 144 /**
 145  * camel_shutdown:
 146  *
 147  * Since: 2.24
 148  **/
 149 void
 150 camel_shutdown (void)
 151 {
 152         CamelCertDB *certdb;
 153
 154         if (!initialised)
 155                 return;
 156
 157         certdb = camel_certdb_get_default ();
 158         if (certdb) {
 159                 camel_certdb_save (certdb);
 160                 camel_certdb_set_default (NULL);
 161         }
 162
 163         /* These next calls must come last. */
 164
 165 #if defined (HAVE_NSS)
 166         if (nss_initlock != NULL) {
 167                 PR_Lock(nss_initlock);
 168                 if (nss_initialized)
 169                         NSS_Shutdown ();
 170                 PR_Unlock(nss_initlock);
 171         }
 172 #endif /* HAVE_NSS */
 173
 174         initialised = FALSE;
 175 }