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
  25 #ifdef HAVE_CONFIG_H
  26 #include <config.h>
  27 #endif
  28
  29 #include <signal.h>
  30
  31 #ifdef HAVE_NSS
  32 #include <nspr.h>
  33 #include <prthread.h>
  34 #include "nss.h"      /* Don't use <> here or it will include the system nss.h instead */
  35 #include <ssl.h>
  36 #endif /* HAVE_NSS */
  37
  38 #include <glib.h>
  39 #include <glib/gi18n-lib.h>
  40
  41 #include "camel.h"
  42 #include "camel-certdb.h"
  43 #include "camel-debug.h"
  44 #include "camel-provider.h"
  45 #include "camel-private.h"
  46
  47 #ifdef HAVE_NSS
  48 /* To protect NSS initialization and shutdown. This prevents
  49    concurrent calls to shutdown() and init() by different threads */
  50 PRLock *nss_initlock = NULL;
  51
  52 /* Whether or not Camel has initialized the NSS library. We cannot
  53    unconditionally call NSS_Shutdown() if NSS was initialized by other
  54    library before. This boolean ensures that we only perform a cleanup
  55    if and only if Camel is the one that previously initialized NSS */
  56 volatile gboolean nss_initialized = FALSE;
  57 #endif
  58
  59 static int initialised = FALSE;
  60
  61 int camel_application_is_exiting = FALSE;
  62
  63 int
  64 camel_init (const char *configdir, gboolean nss_init)
  65 {
  66         CamelCertDB *certdb;
  67         char *path;
  68
  69         if (initialised)
  70                 return 0;
  71
  72         bindtextdomain (GETTEXT_PACKAGE, EVOLUTION_LOCALEDIR);
  73         bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
  74
  75         camel_debug_init();
  76
  77         /* initialise global camel_object_type */
  78         camel_object_get_type();
  79
  80 #ifdef HAVE_NSS
  81         if (nss_init) {
  82                 char *nss_configdir;
  83                 PRUint16 indx;
  84
  85                 if (nss_initlock == NULL) {
  86                         PR_Init(PR_SYSTEM_THREAD, PR_PRIORITY_NORMAL, 10);
  87                         nss_initlock = PR_NewLock();
  88                 }
  89                 PR_Lock (nss_initlock);
  90
  91 #ifndef G_OS_WIN32
  92                 nss_configdir = g_strdup (configdir);
  93 #else
  94                 nss_configdir = g_win32_locale_filename_from_utf8 (configdir);
  95 #endif
  96
  97                 if (!NSS_IsInitialized()) {
  98                         nss_initialized = 1;
  99
 100                         if (NSS_InitReadWrite (nss_configdir) == SECFailure) {
 101                                 /* fall back on using volatile dbs? */
 102                                 if (NSS_NoDB_Init (nss_configdir) == SECFailure) {
 103                                         g_free (nss_configdir);
 104                                         g_warning ("Failed to initialize NSS");
 105                                         nss_initialized = 0;
 106                                         PR_Unlock(nss_initlock);
 107                                         return -1;
 108                                 }
 109                         }
 110                 }
 111
 112                 NSS_SetDomesticPolicy ();
 113
 114                 PR_Unlock(nss_initlock);
 115
 116                 /* we must enable all ciphersuites */
 117                 for (indx = 0; indx < SSL_NumImplementedCiphers; indx++) {
 118                         if (!SSL_IS_SSL2_CIPHER(SSL_ImplementedCiphers[indx]))
 119                                 SSL_CipherPrefSetDefault (SSL_ImplementedCiphers[indx], PR_TRUE);
 120                 }
 121
 122                 SSL_OptionSetDefault (SSL_ENABLE_SSL2, PR_TRUE);
 123                 SSL_OptionSetDefault (SSL_ENABLE_SSL3, PR_TRUE);
 124                 SSL_OptionSetDefault (SSL_ENABLE_TLS, PR_TRUE);
 125                 SSL_OptionSetDefault (SSL_V2_COMPATIBLE_HELLO, PR_TRUE /* maybe? */);
 126
 127                 g_free (nss_configdir);
 128         }
 129 #endif /* HAVE_NSS */
 130
 131         path = g_strdup_printf ("%s/camel-cert.db", configdir);
 132         certdb = camel_certdb_new ();
 133         camel_certdb_set_filename (certdb, path);
 134         g_free (path);
 135
 136         /* if we fail to load, who cares? it'll just be a volatile certdb */
 137         camel_certdb_load (certdb);
 138
 139         /* set this certdb as the default db */
 140         camel_certdb_set_default (certdb);
 141
 142         camel_object_unref (certdb);
 143
 144         initialised = TRUE;
 145
 146         return 0;
 147 }
 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         PR_Lock(nss_initlock);
 167         if (nss_initialized)
 168                 NSS_Shutdown ();
 169         PR_Unlock(nss_initlock);
 170 #endif /* HAVE_NSS */
 171
 172         initialised = FALSE;
 173 }