src/plugins/pgpcore/pgp_viewer.c

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