src/plugins/pgpcore/pgp_viewer.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2007 the Claws Mail team
   4  * This file Copyright (C) 2006 Colin Leroy <colin@colino.net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  */
  20
  21 #ifdef HAVE_CONFIG_H
  22 #  include "config.h"
  23 #endif
  24
  25 #include <stddef.h>
  26 #include <glib.h>
  27 #include <glib/gi18n.h>
  28 #include <sys/types.h>
  29 #ifndef G_OS_WIN32
  30 #  include <sys/wait.h>
  31 #endif
  32 #if (defined(__DragonFly__) || defined (__NetBSD__) || defined (__FreeBSD__) || defined (__OpenBSD__))
  33 #  include <sys/signal.h>
  34 #endif
  35
  36 #include "version.h"
  37 #include "common/claws.h"
  38 #include "mainwindow.h"
  39 #include "mimeview.h"
  40 #include "textview.h"
  41 #include "sgpgme.h"
  42 #include "prefs_common.h"
  43 #include "prefs_gpg.h"
  44 #include "alertpanel.h"
  45 #include "plugin.h"
  46
  47 typedef struct _PgpViewer PgpViewer;
  48
  49 static MimeViewerFactory pgp_viewer_factory;
  50
  51 struct _PgpViewer
  52 {
  53         MimeViewer       mimeviewer;
  54         TextView        *textview;
  55 };
  56
  57 static gchar *content_types[] =
  58         {"application/pgp-signature", NULL};
  59
  60 static GtkWidget *pgp_get_widget(MimeViewer *_viewer)
  61 {
  62         PgpViewer *viewer = (PgpViewer *) _viewer;
  63
  64         debug_print("pgp_get_widget\n");
  65
  66         return GTK_WIDGET(viewer->textview->vbox);
  67 }
  68
  69 static void pgpview_show_mime_part(TextView *textview, MimeInfo *partinfo)
  70 {
  71         GtkTextView *text;
  72         GtkTextBuffer *buffer;
  73         GtkTextIter iter;
  74         gpgme_data_t sigdata = NULL;
  75         gpgme_verify_result_t sigstatus = NULL;
  76         gpgme_ctx_t ctx = NULL;
  77         gpgme_key_t key = NULL;
  78         gpgme_signature_t sig = NULL;
  79         gpgme_error_t err = 0;
  80         if (!partinfo) return;
  81
  82
  83         textview_set_font(textview, NULL);
  84         textview_clear(textview);
  85
  86         text = GTK_TEXT_VIEW(textview->text);
  87         buffer = gtk_text_view_get_buffer(text);
  88         gtk_text_buffer_get_start_iter(buffer, &iter);
  89
  90         err = gpgme_new (&ctx);
  91         if (err) {
  92                 debug_print("err : %s\n", gpgme_strerror(err));
  93                 textview_show_mime_part(textview, partinfo);
  94                 return;
  95         }
  96
  97         sigdata = sgpgme_data_from_mimeinfo(partinfo);
  98         if (!sigdata) {
  99                 g_warning("no sigdata");
 100                 textview_show_mime_part(textview, partinfo);
 101                 return;
 102         }
 103         sigstatus = sgpgme_verify_signature(ctx, sigdata, sigdata, NULL);
 104         if (!sigstatus || sigstatus == GINT_TO_POINTER(-GPG_ERR_SYSTEM_ERROR)) {
 105                 g_warning("no sigstatus");
 106                 textview_show_mime_part(textview, partinfo);
 107                 return;
 108         }
 109         sig = sigstatus->signatures;
 110         if (!sig) {
 111                 g_warning("no sig");
 112                 textview_show_mime_part(textview, partinfo);
 113                 return;
 114         }
 115         gpgme_get_key(ctx, sig->fpr, &key, 0);
 116         if (!key) {
 117                 gchar *cmd = g_strdup_printf("gpg --no-tty --recv-keys %s", sig->fpr);
 118                 AlertValue val = G_ALERTDEFAULT;
 119                 if (!prefs_common.work_offline) {
 120                         val = alertpanel(_("Key import"),
 121                                 _("This key is not in your keyring. Do you want "
 122                                   "Claws Mail to try and import it from a "
 123                                   "keyserver?"),
 124                                   GTK_STOCK_NO, "+" GTK_STOCK_YES, NULL);
 125                         GTK_EVENTS_FLUSH();
 126                 }
 127                 if (val == G_ALERTDEFAULT) {
 128                         TEXTVIEW_INSERT(_("\n  Key ID "));
 129                         TEXTVIEW_INSERT(sig->fpr);
 130                         TEXTVIEW_INSERT(":\n\n");
 131                         TEXTVIEW_INSERT(_("   This key is not in your keyring.\n"));
 132                         TEXTVIEW_INSERT(_("   It should be possible to import it "));
 133                         if (prefs_common.work_offline)
 134                                 TEXTVIEW_INSERT(_("when working online,\n   or "));
 135                         TEXTVIEW_INSERT(_("with the following command: \n\n     "));
 136                         TEXTVIEW_INSERT(cmd);
 137                 } else {
 138 #ifndef G_OS_WIN32
 139                         int res = 0;
 140                         pid_t pid = 0;
 141
 142                         TEXTVIEW_INSERT(_("\n  Importing key ID "));
 143                         TEXTVIEW_INSERT(sig->fpr);
 144                         TEXTVIEW_INSERT(":\n\n");
 145
 146                         main_window_cursor_wait(mainwindow_get_mainwindow());
 147                         GTK_EVENTS_FLUSH();
 148
 149                         pid = fork();
 150                         if (pid == -1) {
 151                                 res = -1;
 152                         } else if (pid == 0) {
 153                                 /* son */
 154                                 res = system(cmd);
 155                                 res = WEXITSTATUS(res);
 156                                 _exit(res);
 157                         } else {
 158                                 int status = 0;
 159                                 time_t start_wait = time(NULL);
 160                                 res = -1;
 161                                 do {
 162                                         if (waitpid(pid, &status, WNOHANG) == 0 || !WIFEXITED(status)) {
 163                                                 usleep(200000);
 164                                         } else {
 165                                                 res = WEXITSTATUS(status);
 166                                                 break;
 167                                         }
 168                                         if (time(NULL) - start_wait > 5) {
 169                                                 debug_print("SIGTERM'ing gpg\n");
 170                                                 kill(pid, SIGTERM);
 171                                         }
 172                                         if (time(NULL) - start_wait > 6) {
 173                                                 debug_print("SIGKILL'ing gpg\n");
 174                                                 kill(pid, SIGKILL);
 175                                                 break;
 176                                         }
 177                                 } while(1);
 178                         }
 179                         main_window_cursor_normal(mainwindow_get_mainwindow());
 180                         if (res == 0) {
 181                                 TEXTVIEW_INSERT(_("   This key has been imported to your keyring.\n"));
 182                         } else {
 183                                 TEXTVIEW_INSERT(_("   This key couldn't be imported to your keyring.\n"));
 184                                 TEXTVIEW_INSERT(_("   You can try to import it manually with the command:\n\n     "));
 185                                 TEXTVIEW_INSERT(cmd);
 186                         }
 187 #else
 188                         TEXTVIEW_INSERT(_("   This key is not in your keyring.\n"));
 189                         TEXTVIEW_INSERT(_("   Key import isn't implemented in Windows.\n"));
 190 #endif
 191                 }
 192                 g_free(cmd);
 193                 return;
 194         } else {
 195                 TEXTVIEW_INSERT(_("\n  Key ID "));
 196                 TEXTVIEW_INSERT(sig->fpr);
 197                 TEXTVIEW_INSERT(":\n\n");
 198                 TEXTVIEW_INSERT(_("   This key is in your keyring.\n"));
 199         }
 200         gpgme_data_release(sigdata);
 201         gpgme_release(ctx);
 202         textview_show_icon(textview, GTK_STOCK_DIALOG_AUTHENTICATION);
 203 }
 204
 205
 206 static void pgp_show_mimepart(MimeViewer *_viewer,
 207                                 const gchar *infile,
 208                                 MimeInfo *partinfo)
 209 {
 210         PgpViewer *viewer = (PgpViewer *)_viewer;
 211         debug_print("pgp_show_mimepart\n");
 212         viewer->textview->messageview = _viewer->mimeview->messageview;
 213         pgpview_show_mime_part(viewer->textview, partinfo);
 214 }
 215
 216 static void pgp_clear_viewer(MimeViewer *_viewer)
 217 {
 218         PgpViewer *viewer = (PgpViewer *)_viewer;
 219         debug_print("pgp_clear_viewer\n");
 220         textview_clear(viewer->textview);
 221 }
 222
 223 static void pgp_destroy_viewer(MimeViewer *_viewer)
 224 {
 225         PgpViewer *viewer = (PgpViewer *)_viewer;
 226         debug_print("pgp_destroy_viewer\n");
 227         textview_destroy(viewer->textview);
 228 }
 229
 230 static MimeViewer *pgp_viewer_create(void)
 231 {
 232         PgpViewer *viewer;
 233
 234         debug_print("pgp_viewer_create\n");
 235
 236         viewer = g_new0(PgpViewer, 1);
 237         viewer->mimeviewer.factory = &pgp_viewer_factory;
 238         viewer->mimeviewer.get_widget = pgp_get_widget;
 239         viewer->mimeviewer.show_mimepart = pgp_show_mimepart;
 240         viewer->mimeviewer.clear_viewer = pgp_clear_viewer;
 241         viewer->mimeviewer.destroy_viewer = pgp_destroy_viewer;
 242         viewer->mimeviewer.get_selection = NULL;
 243         viewer->textview = textview_create();
 244         textview_init(viewer->textview);
 245
 246         gtk_widget_show_all(viewer->textview->vbox);
 247
 248         return (MimeViewer *) viewer;
 249 }
 250
 251 static MimeViewerFactory pgp_viewer_factory =
 252 {
 253         content_types,
 254         0,
 255
 256         pgp_viewer_create,
 257 };
 258
 259 void pgp_viewer_init(void)
 260 {
 261         mimeview_register_viewer_factory(&pgp_viewer_factory);
 262 }
 263
 264 void pgp_viewer_done(void)
 265 {
 266         mimeview_unregister_viewer_factory(&pgp_viewer_factory);
 267
 268 }