src/plugins/pgpcore/passphrase.c

   1 /* passphrase.c - GTK+ based passphrase callback
   2  *      Copyright (C) 2001-2006 Werner Koch (dd9jn) and the Sylpheed-Claws team
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  17  */
  18
  19 #ifdef HAVE_CONFIG_H
  20 #  include <config.h>
  21 #endif
  22
  23 #if USE_GPGME
  24
  25 #include <glib.h>
  26 #include <glib/gi18n.h>
  27 #include <gdk/gdktypes.h>
  28 #include <gdk/gdkkeysyms.h>
  29 #include <gdk/gdkdisplay.h>
  30 #ifdef GDK_WINDOWING_X11
  31 #  include <gdk/gdkx.h>
  32 #endif /* GDK_WINDOWING_X11 */
  33 #include <gtk/gtkmain.h>
  34 #include <gtk/gtkwidget.h>
  35 #include <gtk/gtkwindow.h>
  36 #include <gtk/gtkvbox.h>
  37 #include <gtk/gtktable.h>
  38 #include <gtk/gtklabel.h>
  39 #include <gtk/gtkentry.h>
  40 #include <gtk/gtkhbbox.h>
  41 #include <gtk/gtkbutton.h>
  42 #include <gtk/gtkfilesel.h>
  43 #include <gtk/gtksignal.h>
  44 #include <string.h>
  45 #include <sys/types.h>
  46 #ifdef G_OS_WIN32
  47 #include <windows.h>
  48 #else
  49 #include <sys/mman.h>
  50 #endif
  51
  52 #include "passphrase.h"
  53 #include "prefs_common.h"
  54 #include "prefs_gpg.h"
  55 #include "manage_window.h"
  56 #include "utils.h"
  57 #include "mainwindow.h"
  58 #include "summaryview.h"
  59
  60 static gboolean grab_all = FALSE;
  61
  62 static gboolean pass_ack;
  63 static gchar *last_pass = NULL;
  64
  65 static void passphrase_ok_cb(GtkWidget *widget, gpointer data);
  66 static void passphrase_cancel_cb(GtkWidget *widget, gpointer data);
  67 static gint passphrase_deleted(GtkWidget *widget, GdkEventAny *event,
  68                                gpointer data);
  69 static gboolean passphrase_key_pressed(GtkWidget *widget, GdkEventKey *event,
  70                                        gpointer data);
  71 static gchar* passphrase_mbox(const gchar *uid_hint, const gchar *pass_hint,
  72                               gint prev_bad);
  73
  74 static GtkWidget *create_description(const gchar *uid_hint,
  75                                      const gchar *pass_hint, gint prev_bad);
  76
  77 void
  78 gpgmegtk_set_passphrase_grab(gint yes)
  79 {
  80     grab_all = yes;
  81 }
  82
  83 static gchar*
  84 passphrase_mbox(const gchar *uid_hint, const gchar *pass_hint, gint prev_bad)
  85 {
  86     gchar *the_passphrase = NULL;
  87     GtkWidget *vbox, *hbox;
  88     GtkWidget *confirm_box;
  89     GtkWidget *window;
  90     GtkWidget *pass_entry;
  91     GtkWidget *ok_button;
  92     GtkWidget *cancel_button;
  93
  94     SummaryView *summaryview = mainwindow_get_mainwindow()->summaryview;
  95
  96     gtk_menu_popdown(GTK_MENU(summaryview->popupmenu));
  97
  98     window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  99     gtk_window_set_title(GTK_WINDOW(window), _("Passphrase"));
 100     gtk_window_set_resizable(GTK_WINDOW(window), TRUE);
 101     gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
 102     gtk_window_set_modal(GTK_WINDOW(window), TRUE);
 103     gtk_window_set_policy(GTK_WINDOW(window), FALSE, TRUE, FALSE);
 104     g_signal_connect(G_OBJECT(window), "delete_event",
 105                      G_CALLBACK(passphrase_deleted), NULL);
 106     g_signal_connect(G_OBJECT(window), "key_press_event",
 107                      G_CALLBACK(passphrase_key_pressed), NULL);
 108     MANAGE_WINDOW_SIGNALS_CONNECT(window);
 109     manage_window_set_transient(GTK_WINDOW(window));
 110
 111     vbox = gtk_vbox_new(FALSE, 8);
 112     gtk_container_add(GTK_CONTAINER(window), vbox);
 113     gtk_container_set_border_width(GTK_CONTAINER(vbox), 8);
 114
 115     if (uid_hint || pass_hint) {
 116         GtkWidget *label, *icon;
 117         label = create_description (uid_hint, pass_hint, prev_bad);
 118         icon = gtk_image_new_from_stock(GTK_STOCK_DIALOG_AUTHENTICATION,
 119                                 GTK_ICON_SIZE_DIALOG);
 120
 121         hbox = gtk_hbox_new (FALSE, 12);
 122         gtk_container_set_border_width (GTK_CONTAINER (hbox), 5);
 123         gtk_widget_show (hbox);
 124         gtk_box_pack_start (GTK_BOX(hbox), icon, FALSE, FALSE, 0);
 125         gtk_box_pack_start (GTK_BOX(hbox), label, FALSE, FALSE, 0);
 126         gtk_box_pack_start (GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
 127     }
 128
 129     pass_entry = gtk_entry_new();
 130     gtk_box_pack_start(GTK_BOX(vbox), pass_entry, FALSE, FALSE, 0);
 131     gtk_entry_set_visibility(GTK_ENTRY(pass_entry), FALSE);
 132     gtk_widget_grab_focus(pass_entry);
 133
 134     gtkut_stock_button_set_create(&confirm_box,
 135                                   &cancel_button, GTK_STOCK_CANCEL,
 136                                   &ok_button, GTK_STOCK_OK,
 137                                   NULL, NULL);
 138     gtk_box_pack_end(GTK_BOX(vbox), confirm_box, FALSE, FALSE, 0);
 139     gtk_widget_grab_default(ok_button);
 140
 141     g_signal_connect(G_OBJECT(ok_button), "clicked",
 142                      G_CALLBACK(passphrase_ok_cb), NULL);
 143     g_signal_connect(G_OBJECT(pass_entry), "activate",
 144                      G_CALLBACK(passphrase_ok_cb), NULL);
 145     g_signal_connect(G_OBJECT(cancel_button), "clicked",
 146                      G_CALLBACK(passphrase_cancel_cb), NULL);
 147
 148     gtk_window_set_position (GTK_WINDOW(window), GTK_WIN_POS_CENTER);
 149     if (grab_all)
 150         gtk_window_set_policy (GTK_WINDOW(window), FALSE, FALSE, TRUE);
 151
 152     gtk_widget_show_all(window);
 153
 154     if (grab_all) {
 155         int err = 0, cnt = 0;
 156         /* make sure that window is viewable */
 157         gtk_widget_show_now(window);
 158         gdk_window_process_updates(window->window, TRUE);
 159         gdk_flush();
 160         while(gtk_events_pending()) {
 161                 gtk_main_iteration();
 162         }
 163 try_again:
 164         if ((err = gdk_pointer_grab(window->window, TRUE, 0,
 165                              window->window, NULL, GDK_CURRENT_TIME))) {
 166             if (err == GDK_GRAB_NOT_VIEWABLE && cnt < 10) {
 167                 cnt++;
 168                 g_warning("trying to grab mouse again\n");
 169                 gtk_main_iteration();
 170                 goto try_again;
 171             } else {
 172                 g_warning("OOPS: Could not grab mouse\n");
 173                 gtk_widget_destroy(window);
 174                 return NULL;
 175             }
 176         }
 177         if (gdk_keyboard_grab(window->window, FALSE, GDK_CURRENT_TIME)) {
 178             gdk_display_pointer_ungrab(gdk_display_get_default(),
 179                                        GDK_CURRENT_TIME);
 180             g_warning("OOPS: Could not grab keyboard\n");
 181             gtk_widget_destroy(window);
 182             return NULL;
 183         }
 184     }
 185
 186     gtk_main();
 187
 188     if (grab_all) {
 189         gdk_display_keyboard_ungrab(gdk_display_get_default(),
 190                                     GDK_CURRENT_TIME);
 191         gdk_display_pointer_ungrab(gdk_display_get_default(), GDK_CURRENT_TIME);
 192         gdk_flush();
 193     }
 194
 195     manage_window_focus_out(window, NULL, NULL);
 196
 197     if (pass_ack) {
 198         const gchar *entry_text;
 199         entry_text = gtk_entry_get_text(GTK_ENTRY(pass_entry));
 200         the_passphrase = g_locale_from_utf8(entry_text, -1, NULL, NULL, NULL);
 201         if (the_passphrase == NULL)
 202             the_passphrase = g_strdup (entry_text);
 203     }
 204     gtk_widget_destroy (window);
 205
 206     return the_passphrase;
 207 }
 208
 209
 210 static void
 211 passphrase_ok_cb(GtkWidget *widget, gpointer data)
 212 {
 213     pass_ack = TRUE;
 214     gtk_main_quit();
 215 }
 216
 217 static void
 218 passphrase_cancel_cb(GtkWidget *widget, gpointer data)
 219 {
 220     pass_ack = FALSE;
 221     gtk_main_quit();
 222 }
 223
 224
 225 static gint
 226 passphrase_deleted(GtkWidget *widget, GdkEventAny *event, gpointer data)
 227 {
 228     passphrase_cancel_cb(NULL, NULL);
 229     return TRUE;
 230 }
 231
 232
 233 static gboolean
 234 passphrase_key_pressed(GtkWidget *widget, GdkEventKey *event, gpointer data)
 235 {
 236     if (event && event->keyval == GDK_Escape)
 237         passphrase_cancel_cb(NULL, NULL);
 238     return FALSE;
 239 }
 240
 241 static gint
 242 linelen (const gchar *s)
 243 {
 244     gint i;
 245
 246     for (i = 0; *s && *s != '\n'; s++, i++)
 247         ;
 248
 249     return i;
 250 }
 251
 252 static GtkWidget *
 253 create_description(const gchar *uid_hint, const gchar *pass_hint, gint prev_bad)
 254 {
 255     const gchar *uid = NULL, *info = NULL;
 256     gchar *buf;
 257     GtkWidget *label;
 258     gchar *my_uid = NULL;
 259     if (!uid_hint)
 260         uid = _("[no user id]");
 261     else
 262         uid = uid_hint;
 263     if (!pass_hint)
 264         info = "";
 265     else
 266         info = pass_hint;
 267
 268     my_uid = g_strdup(uid);
 269     while (strchr(my_uid, '<'))
 270         *(strchr(my_uid, '<')) = '(';
 271     while (strchr(my_uid, '>'))
 272         *(strchr(my_uid, '>')) = ')';
 273
 274     buf = g_strdup_printf (_("<span weight=\"bold\" size=\"larger\">%sPlease enter the passphrase for:</span>\n\n"
 275                            "%.*s\n"),
 276                            prev_bad ?
 277                            _("Bad passphrase.\n") : "",
 278                            linelen (my_uid), my_uid);
 279     g_free(my_uid);
 280     label = gtk_label_new (buf);
 281     gtk_label_set_use_markup(GTK_LABEL (label), TRUE);
 282     gtk_label_set_justify (GTK_LABEL (label), GTK_JUSTIFY_LEFT);
 283     gtk_label_set_line_wrap(GTK_LABEL (label), TRUE);
 284     g_free (buf);
 285
 286     return label;
 287 }
 288
 289 static int free_passphrase(gpointer _unused)
 290 {
 291     if (last_pass != NULL) {
 292 #ifndef G_PLATFORM_WIN32
 293         munlock(last_pass, strlen(last_pass));
 294 #endif
 295         g_free(last_pass);
 296         last_pass = NULL;
 297         debug_print("%% passphrase removed\n");
 298     }
 299
 300     return FALSE;
 301 }
 302
 303 gpgme_error_t
 304 gpgmegtk_passphrase_cb(void *opaque, const char *uid_hint,
 305         const char *passphrase_hint, int prev_bad, int fd)
 306 {
 307     const char *pass;
 308
 309     if (prefs_gpg_get_config()->store_passphrase && last_pass && !prev_bad)
 310         pass = last_pass;
 311     else {
 312     gpgmegtk_set_passphrase_grab (prefs_gpg_get_config()->passphrase_grab);
 313     debug_print ("%% requesting passphrase for '%s'\n ", uid_hint);
 314     pass = passphrase_mbox (uid_hint, passphrase_hint, prev_bad);
 315     gpgmegtk_free_passphrase();
 316     if (!pass) {
 317         debug_print ("%% cancel passphrase entry\n");
 318         write(fd, "\n", 1);
 319         return GPG_ERR_CANCELED;
 320     }
 321     else {
 322         if (prefs_gpg_get_config()->store_passphrase) {
 323             last_pass = g_strdup(pass);
 324 #ifndef G_PLATFORM_WIN32
 325             if (mlock(last_pass, strlen(last_pass)) == -1)
 326                 debug_print("%% locking passphrase failed\n");
 327 #endif
 328             if (prefs_gpg_get_config()->store_passphrase_timeout > 0) {
 329                     gtk_timeout_add(prefs_gpg_get_config()
 330                                     ->store_passphrase_timeout*60*1000,
 331                                 free_passphrase, NULL);
 332             }
 333         }
 334         debug_print ("%% sending passphrase\n");
 335     }
 336     }
 337
 338 #ifdef G_OS_WIN32
 339     {
 340         /* Under Windows FD is actually a System handle. */
 341         DWORD nwritten;
 342         WriteFile ((HANDLE)fd, pass, strlen (pass), &nwritten, NULL);
 343         WriteFile ((HANDLE)fd, "\n", 1, &nwritten, NULL);
 344     }
 345 #else
 346     write(fd, pass, strlen(pass));
 347     write(fd, "\n", 1);
 348 #endif
 349     return GPG_ERR_NO_ERROR;
 350 }
 351
 352 void gpgmegtk_free_passphrase()
 353 {
 354     (void)free_passphrase(NULL); /* could be inline */
 355 }
 356
 357 #endif /* USE_GPGME */