src/plugins/pgpcore/passphrase.c

   1 /* passphrase.c - GTK+ based passphrase callback
   2  *      Copyright (C) 2001 Werner Koch (dd9jn)
   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 #include <sys/mman.h>
  47
  48 #include "passphrase.h"
  49 #include "prefs_common.h"
  50 #include "prefs_gpg.h"
  51 #include "manage_window.h"
  52 #include "utils.h"
  53 #include "mainwindow.h"
  54 #include "summaryview.h"
  55
  56 static gboolean grab_all = FALSE;
  57
  58 static gboolean pass_ack;
  59 static gchar *last_pass = NULL;
  60
  61 static void passphrase_ok_cb(GtkWidget *widget, gpointer data);
  62 static void passphrase_cancel_cb(GtkWidget *widget, gpointer data);
  63 static gint passphrase_deleted(GtkWidget *widget, GdkEventAny *event,
  64                                gpointer data);
  65 static gboolean passphrase_key_pressed(GtkWidget *widget, GdkEventKey *event,
  66                                        gpointer data);
  67 static gchar* passphrase_mbox(const gchar *uid_hint, const gchar *pass_hint,
  68                               gint prev_bad);
  69
  70 static GtkWidget *create_description(const gchar *uid_hint,
  71                                      const gchar *pass_hint, gint prev_bad);
  72
  73 void
  74 gpgmegtk_set_passphrase_grab(gint yes)
  75 {
  76     grab_all = yes;
  77 }
  78
  79 static gchar*
  80 passphrase_mbox(const gchar *uid_hint, const gchar *pass_hint, gint prev_bad)
  81 {
  82     gchar *the_passphrase = NULL;
  83     GtkWidget *vbox, *hbox;
  84     GtkWidget *confirm_box;
  85     GtkWidget *window;
  86     GtkWidget *pass_entry;
  87     GtkWidget *ok_button;
  88     GtkWidget *cancel_button;
  89
  90     SummaryView *summaryview = mainwindow_get_mainwindow()->summaryview;
  91
  92     gtk_menu_popdown(GTK_MENU(summaryview->popupmenu));
  93
  94     window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  95     gtk_window_set_title(GTK_WINDOW(window), _("Passphrase"));
  96     gtk_widget_set_size_request(window, 450, -1);
  97     gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
  98     gtk_window_set_modal(GTK_WINDOW(window), TRUE);
  99     gtk_window_set_policy(GTK_WINDOW(window), FALSE, FALSE, FALSE);
 100     g_signal_connect(G_OBJECT(window), "delete_event",
 101                      G_CALLBACK(passphrase_deleted), NULL);
 102     g_signal_connect(G_OBJECT(window), "key_press_event",
 103                      G_CALLBACK(passphrase_key_pressed), NULL);
 104     MANAGE_WINDOW_SIGNALS_CONNECT(window);
 105     manage_window_set_transient(GTK_WINDOW(window));
 106
 107     vbox = gtk_vbox_new(FALSE, 8);
 108     gtk_container_add(GTK_CONTAINER(window), vbox);
 109     gtk_container_set_border_width(GTK_CONTAINER(vbox), 8);
 110
 111     if (uid_hint || pass_hint) {
 112         GtkWidget *label, *icon;
 113         label = create_description (uid_hint, pass_hint, prev_bad);
 114         icon = gtk_image_new_from_stock(GTK_STOCK_DIALOG_AUTHENTICATION,
 115                                 GTK_ICON_SIZE_DIALOG);
 116
 117         hbox = gtk_hbox_new (FALSE, 12);
 118         gtk_container_set_border_width (GTK_CONTAINER (hbox), 5);
 119         gtk_widget_show (hbox);
 120         gtk_box_pack_start (GTK_BOX(hbox), icon, FALSE, FALSE, 0);
 121         gtk_box_pack_start (GTK_BOX(hbox), label, FALSE, FALSE, 0);
 122         gtk_box_pack_start (GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
 123     }
 124
 125     pass_entry = gtk_entry_new();
 126     gtk_box_pack_start(GTK_BOX(vbox), pass_entry, FALSE, FALSE, 0);
 127     gtk_entry_set_visibility(GTK_ENTRY(pass_entry), FALSE);
 128     gtk_widget_grab_focus(pass_entry);
 129
 130     gtkut_stock_button_set_create(&confirm_box, &ok_button, GTK_STOCK_OK,
 131                                   &cancel_button, GTK_STOCK_CANCEL,
 132                                   NULL, NULL);
 133     gtk_box_pack_end(GTK_BOX(vbox), confirm_box, FALSE, FALSE, 0);
 134     gtk_widget_grab_default(ok_button);
 135
 136     g_signal_connect(G_OBJECT(ok_button), "clicked",
 137                      G_CALLBACK(passphrase_ok_cb), NULL);
 138     g_signal_connect(G_OBJECT(pass_entry), "activate",
 139                      G_CALLBACK(passphrase_ok_cb), NULL);
 140     g_signal_connect(G_OBJECT(cancel_button), "clicked",
 141                      G_CALLBACK(passphrase_cancel_cb), NULL);
 142
 143     gtk_window_set_position (GTK_WINDOW(window), GTK_WIN_POS_CENTER);
 144     if (grab_all)
 145         gtk_window_set_policy (GTK_WINDOW(window), FALSE, FALSE, TRUE);
 146
 147     gtk_widget_show_all(window);
 148
 149     if (grab_all) {
 150         int err = 0, cnt = 0;
 151         /* make sure that window is viewable */
 152         gtk_widget_show_now(window);
 153         gdk_window_process_updates(window->window, TRUE);
 154         gdk_flush();
 155         while(gtk_events_pending()) {
 156                 gtk_main_iteration();
 157         }
 158 try_again:
 159         if ((err = gdk_pointer_grab(window->window, TRUE, 0,
 160                              window->window, NULL, GDK_CURRENT_TIME))) {
 161             if (err == GDK_GRAB_NOT_VIEWABLE && cnt < 10) {
 162                 cnt++;
 163                 g_warning("trying to grab mouse again\n");
 164                 gtk_main_iteration();
 165                 goto try_again;
 166             } else {
 167                 g_warning("OOPS: Could not grab mouse\n");
 168                 gtk_widget_destroy(window);
 169                 return NULL;
 170             }
 171         }
 172         if (gdk_keyboard_grab(window->window, FALSE, GDK_CURRENT_TIME)) {
 173             gdk_display_pointer_ungrab(gdk_display_get_default(),
 174                                        GDK_CURRENT_TIME);
 175             g_warning("OOPS: Could not grab keyboard\n");
 176             gtk_widget_destroy(window);
 177             return NULL;
 178         }
 179     }
 180
 181     gtk_main();
 182
 183     if (grab_all) {
 184         gdk_display_keyboard_ungrab(gdk_display_get_default(),
 185                                     GDK_CURRENT_TIME);
 186         gdk_display_pointer_ungrab(gdk_display_get_default(), GDK_CURRENT_TIME);
 187         gdk_flush();
 188     }
 189
 190     manage_window_focus_out(window, NULL, NULL);
 191
 192     if (pass_ack) {
 193         const gchar *entry_text;
 194         entry_text = gtk_entry_get_text(GTK_ENTRY(pass_entry));
 195         if (entry_text) /* Hmmm: Do we really need this? */
 196             the_passphrase = g_strdup (entry_text);
 197     }
 198     gtk_widget_destroy (window);
 199
 200     return the_passphrase;
 201 }
 202
 203
 204 static void
 205 passphrase_ok_cb(GtkWidget *widget, gpointer data)
 206 {
 207     pass_ack = TRUE;
 208     gtk_main_quit();
 209 }
 210
 211 static void
 212 passphrase_cancel_cb(GtkWidget *widget, gpointer data)
 213 {
 214     pass_ack = FALSE;
 215     gtk_main_quit();
 216 }
 217
 218
 219 static gint
 220 passphrase_deleted(GtkWidget *widget, GdkEventAny *event, gpointer data)
 221 {
 222     passphrase_cancel_cb(NULL, NULL);
 223     return TRUE;
 224 }
 225
 226
 227 static gboolean
 228 passphrase_key_pressed(GtkWidget *widget, GdkEventKey *event, gpointer data)
 229 {
 230     if (event && event->keyval == GDK_Escape)
 231         passphrase_cancel_cb(NULL, NULL);
 232     return FALSE;
 233 }
 234
 235 static gint
 236 linelen (const gchar *s)
 237 {
 238     gint i;
 239
 240     for (i = 0; *s && *s != '\n'; s++, i++)
 241         ;
 242
 243     return i;
 244 }
 245
 246 static GtkWidget *
 247 create_description(const gchar *uid_hint, const gchar *pass_hint, gint prev_bad)
 248 {
 249     const gchar *uid = NULL, *info = NULL;
 250     gchar *buf;
 251     GtkWidget *label;
 252     gchar *my_uid = NULL;
 253     if (!uid_hint)
 254         uid = _("[no user id]");
 255     else
 256         uid = uid_hint;
 257     if (!pass_hint)
 258         info = "";
 259     else
 260         info = pass_hint;
 261
 262     my_uid = g_strdup(uid);
 263     while (strchr(my_uid, '<'))
 264         *(strchr(my_uid, '<')) = '(';
 265     while (strchr(my_uid, '>'))
 266         *(strchr(my_uid, '>')) = ')';
 267
 268     buf = g_strdup_printf (_("<span weight=\"bold\" size=\"larger\">%sPlease enter the passphrase for:</span>\n\n"
 269                            "%.*s\n"),
 270                            prev_bad ?
 271                            _("Bad passphrase.\n") : "",
 272                            linelen (my_uid), my_uid);
 273     g_free(my_uid);
 274     label = gtk_label_new (buf);
 275     gtk_label_set_use_markup(GTK_LABEL (label), TRUE);
 276     gtk_label_set_justify (GTK_LABEL (label), GTK_JUSTIFY_LEFT);
 277     g_free (buf);
 278
 279     return label;
 280 }
 281
 282 static int free_passphrase(gpointer _unused)
 283 {
 284     if (last_pass != NULL) {
 285         munlock(last_pass, strlen(last_pass));
 286         g_free(last_pass);
 287         last_pass = NULL;
 288         debug_print("%% passphrase removed");
 289     }
 290
 291     return FALSE;
 292 }
 293
 294 gpgme_error_t
 295 gpgmegtk_passphrase_cb(void *opaque, const char *uid_hint,
 296         const char *passphrase_hint, int prev_bad, int fd)
 297 {
 298     const char *pass;
 299
 300     if (prefs_gpg_get_config()->store_passphrase && last_pass != NULL && !prev_bad) {
 301         write(fd, last_pass, strlen(last_pass));
 302         write(fd, "\n", 1);
 303         return GPG_ERR_NO_ERROR;
 304     }
 305     gpgmegtk_set_passphrase_grab (prefs_gpg_get_config()->passphrase_grab);
 306     debug_print ("%% requesting passphrase for '%s': ", uid_hint);
 307     pass = passphrase_mbox (uid_hint, passphrase_hint, prev_bad);
 308     gpgmegtk_free_passphrase();
 309     if (!pass) {
 310         debug_print ("%% cancel passphrase entry");
 311         write(fd, "\n", 1);
 312         return GPG_ERR_CANCELED;
 313     }
 314     else {
 315         if (prefs_gpg_get_config()->store_passphrase) {
 316             last_pass = g_strdup(pass);
 317             if (mlock(last_pass, strlen(last_pass)) == -1)
 318                 debug_print("%% locking passphrase failed");
 319
 320             if (prefs_gpg_get_config()->store_passphrase_timeout > 0) {
 321                 gtk_timeout_add(prefs_gpg_get_config()->store_passphrase_timeout*60*1000,
 322                                 free_passphrase, NULL);
 323             }
 324         }
 325         debug_print ("%% sending passphrase");
 326     }
 327     write(fd, pass, strlen(pass));
 328     write(fd, "\n", 1);
 329     return GPG_ERR_NO_ERROR;
 330 }
 331
 332 void gpgmegtk_free_passphrase()
 333 {
 334     (void)free_passphrase(NULL); /* could be inline */
 335 }
 336
 337 #endif /* USE_GPGME */