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
  72 static GtkWidget *create_description(const gchar *uid_hint,
  73                                      const gchar *pass_hint, gint prev_bad, gint new_key);
  74
  75 void
  76 gpgmegtk_set_passphrase_grab(gint yes)
  77 {
  78     grab_all = yes;
  79 }
  80
  81 gchar*
  82 passphrase_mbox(const gchar *uid_hint, const gchar *pass_hint, gint prev_bad, gint new_key)
  83 {
  84     gchar *the_passphrase = NULL;
  85     GtkWidget *vbox, *hbox;
  86     GtkWidget *confirm_box;
  87     GtkWidget *window;
  88     GtkWidget *pass_entry;
  89     GtkWidget *ok_button;
  90     GtkWidget *cancel_button;
  91
  92     SummaryView *summaryview = mainwindow_get_mainwindow()->summaryview;
  93
  94     gtk_menu_popdown(GTK_MENU(summaryview->popupmenu));
  95
  96     window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  97     gtk_window_set_title(GTK_WINDOW(window), _("Passphrase"));
  98     gtk_window_set_resizable(GTK_WINDOW(window), TRUE);
  99     gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
 100     gtk_window_set_modal(GTK_WINDOW(window), TRUE);
 101     gtk_window_set_policy(GTK_WINDOW(window), FALSE, TRUE, FALSE);
 102     g_signal_connect(G_OBJECT(window), "delete_event",
 103                      G_CALLBACK(passphrase_deleted), NULL);
 104     g_signal_connect(G_OBJECT(window), "key_press_event",
 105                      G_CALLBACK(passphrase_key_pressed), NULL);
 106     MANAGE_WINDOW_SIGNALS_CONNECT(window);
 107     manage_window_set_transient(GTK_WINDOW(window));
 108
 109     vbox = gtk_vbox_new(FALSE, 8);
 110     gtk_container_add(GTK_CONTAINER(window), vbox);
 111     gtk_container_set_border_width(GTK_CONTAINER(vbox), 8);
 112
 113     if (uid_hint || pass_hint) {
 114         GtkWidget *label, *icon;
 115         label = create_description (uid_hint, pass_hint, prev_bad, new_key);
 116         icon = gtk_image_new_from_stock(GTK_STOCK_DIALOG_AUTHENTICATION,
 117                                 GTK_ICON_SIZE_DIALOG);
 118
 119         hbox = gtk_hbox_new (FALSE, 12);
 120         gtk_container_set_border_width (GTK_CONTAINER (hbox), 5);
 121         gtk_widget_show (hbox);
 122         gtk_box_pack_start (GTK_BOX(hbox), icon, FALSE, FALSE, 0);
 123         gtk_box_pack_start (GTK_BOX(hbox), label, FALSE, FALSE, 0);
 124         gtk_box_pack_start (GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
 125     }
 126
 127     pass_entry = gtk_entry_new();
 128     gtk_box_pack_start(GTK_BOX(vbox), pass_entry, FALSE, FALSE, 0);
 129     gtk_entry_set_visibility(GTK_ENTRY(pass_entry), FALSE);
 130     gtk_widget_grab_focus(pass_entry);
 131
 132     gtkut_stock_button_set_create(&confirm_box,
 133                                   &cancel_button, GTK_STOCK_CANCEL,
 134                                   &ok_button, GTK_STOCK_OK,
 135                                   NULL, NULL);
 136     gtk_box_pack_end(GTK_BOX(vbox), confirm_box, FALSE, FALSE, 0);
 137     gtk_widget_grab_default(ok_button);
 138
 139     g_signal_connect(G_OBJECT(ok_button), "clicked",
 140                      G_CALLBACK(passphrase_ok_cb), NULL);
 141     g_signal_connect(G_OBJECT(pass_entry), "activate",
 142                      G_CALLBACK(passphrase_ok_cb), NULL);
 143     g_signal_connect(G_OBJECT(cancel_button), "clicked",
 144                      G_CALLBACK(passphrase_cancel_cb), NULL);
 145
 146     gtk_window_set_position (GTK_WINDOW(window), GTK_WIN_POS_CENTER);
 147     if (grab_all)
 148         gtk_window_set_policy (GTK_WINDOW(window), FALSE, FALSE, TRUE);
 149
 150     gtk_widget_show_all(window);
 151
 152     if (grab_all) {
 153         int err = 0, cnt = 0;
 154         /* make sure that window is viewable */
 155         gtk_widget_show_now(window);
 156         gdk_window_process_updates(window->window, TRUE);
 157         gdk_flush();
 158         while(gtk_events_pending()) {
 159                 gtk_main_iteration();
 160         }
 161 try_again:
 162         if ((err = gdk_pointer_grab(window->window, TRUE, 0,
 163                              window->window, NULL, GDK_CURRENT_TIME))) {
 164             if (err == GDK_GRAB_NOT_VIEWABLE && cnt < 10) {
 165                 cnt++;
 166                 g_warning("trying to grab mouse again\n");
 167                 gtk_main_iteration();
 168                 goto try_again;
 169             } else {
 170                 g_warning("OOPS: Could not grab mouse\n");
 171                 gtk_widget_destroy(window);
 172                 return NULL;
 173             }
 174         }
 175         if (gdk_keyboard_grab(window->window, FALSE, GDK_CURRENT_TIME)) {
 176             gdk_display_pointer_ungrab(gdk_display_get_default(),
 177                                        GDK_CURRENT_TIME);
 178             g_warning("OOPS: Could not grab keyboard\n");
 179             gtk_widget_destroy(window);
 180             return NULL;
 181         }
 182     }
 183
 184     gtk_main();
 185
 186     if (grab_all) {
 187         gdk_display_keyboard_ungrab(gdk_display_get_default(),
 188                                     GDK_CURRENT_TIME);
 189         gdk_display_pointer_ungrab(gdk_display_get_default(), GDK_CURRENT_TIME);
 190         gdk_flush();
 191     }
 192
 193     manage_window_focus_out(window, NULL, NULL);
 194
 195     if (pass_ack) {
 196         const gchar *entry_text;
 197         entry_text = gtk_entry_get_text(GTK_ENTRY(pass_entry));
 198         the_passphrase = g_locale_from_utf8(entry_text, -1, NULL, NULL, NULL);
 199         if (the_passphrase == NULL)
 200             the_passphrase = g_strdup (entry_text);
 201     }
 202     gtk_widget_destroy (window);
 203
 204     return the_passphrase;
 205 }
 206
 207
 208 static void
 209 passphrase_ok_cb(GtkWidget *widget, gpointer data)
 210 {
 211     pass_ack = TRUE;
 212     gtk_main_quit();
 213 }
 214
 215 static void
 216 passphrase_cancel_cb(GtkWidget *widget, gpointer data)
 217 {
 218     pass_ack = FALSE;
 219     gtk_main_quit();
 220 }
 221
 222
 223 static gint
 224 passphrase_deleted(GtkWidget *widget, GdkEventAny *event, gpointer data)
 225 {
 226     passphrase_cancel_cb(NULL, NULL);
 227     return TRUE;
 228 }
 229
 230
 231 static gboolean
 232 passphrase_key_pressed(GtkWidget *widget, GdkEventKey *event, gpointer data)
 233 {
 234     if (event && event->keyval == GDK_Escape)
 235         passphrase_cancel_cb(NULL, NULL);
 236     return FALSE;
 237 }
 238
 239 static gint
 240 linelen (const gchar *s)
 241 {
 242     gint i;
 243
 244     for (i = 0; *s && *s != '\n'; s++, i++)
 245         ;
 246
 247     return i;
 248 }
 249
 250 static GtkWidget *
 251 create_description(const gchar *uid_hint, const gchar *pass_hint, gint prev_bad, gint new_key)
 252 {
 253     const gchar *uid = NULL, *info = NULL;
 254     gchar *buf;
 255     GtkWidget *label;
 256     gchar *my_uid = NULL;
 257     if (!uid_hint)
 258         uid = _("[no user id]");
 259     else
 260         uid = uid_hint;
 261     if (!pass_hint)
 262         info = "";
 263     else
 264         info = pass_hint;
 265
 266     my_uid = g_strdup(uid);
 267     while (strchr(my_uid, '<'))
 268         *(strchr(my_uid, '<')) = '(';
 269     while (strchr(my_uid, '>'))
 270         *(strchr(my_uid, '>')) = ')';
 271
 272     if (new_key == 1) {
 273             buf = g_strdup_printf (_("<span weight=\"bold\" size=\"larger\">%sPlease enter the passphrase for the new key:</span>\n\n"
 274                            "%.*s\n"),
 275                            prev_bad ?
 276                            _("Passphrases did not match.\n") : "",
 277                            linelen (my_uid), my_uid);
 278     } else if (new_key == 2) {
 279             buf = g_strdup_printf (_("<span weight=\"bold\" size=\"larger\">Please re-enter the passphrase for the new key:</span>\n\n"
 280                            "%.*s\n"),
 281                            linelen (my_uid), my_uid);
 282     } else {
 283             buf = g_strdup_printf (_("<span weight=\"bold\" size=\"larger\">%sPlease enter the passphrase for:</span>\n\n"
 284                            "%.*s\n"),
 285                            prev_bad ?
 286                            _("Bad passphrase.\n") : "",
 287                            linelen (my_uid), my_uid);
 288     }
 289     g_free(my_uid);
 290     label = gtk_label_new (buf);
 291     gtk_label_set_use_markup(GTK_LABEL (label), TRUE);
 292     gtk_label_set_justify (GTK_LABEL (label), GTK_JUSTIFY_LEFT);
 293     gtk_label_set_line_wrap(GTK_LABEL (label), TRUE);
 294     g_free (buf);
 295
 296     return label;
 297 }
 298
 299 static int free_passphrase(gpointer _unused)
 300 {
 301     if (last_pass != NULL) {
 302 #ifndef G_PLATFORM_WIN32
 303         munlock(last_pass, strlen(last_pass));
 304 #endif
 305         g_free(last_pass);
 306         last_pass = NULL;
 307         debug_print("%% passphrase removed\n");
 308     }
 309
 310     return FALSE;
 311 }
 312
 313 gpgme_error_t
 314 gpgmegtk_passphrase_cb(void *opaque, const char *uid_hint,
 315         const char *passphrase_hint, int prev_bad, int fd)
 316 {
 317     const char *pass;
 318
 319     if (prefs_gpg_get_config()->store_passphrase && last_pass && !prev_bad)
 320         pass = last_pass;
 321     else {
 322     gpgmegtk_set_passphrase_grab (prefs_gpg_get_config()->passphrase_grab);
 323     debug_print ("%% requesting passphrase for '%s'\n ", uid_hint);
 324     pass = passphrase_mbox (uid_hint, passphrase_hint, prev_bad, FALSE);
 325     gpgmegtk_free_passphrase();
 326     if (!pass) {
 327         debug_print ("%% cancel passphrase entry\n");
 328         write(fd, "\n", 1);
 329         return GPG_ERR_CANCELED;
 330     }
 331     else {
 332         if (prefs_gpg_get_config()->store_passphrase) {
 333             last_pass = g_strdup(pass);
 334 #ifndef G_PLATFORM_WIN32
 335             if (mlock(last_pass, strlen(last_pass)) == -1)
 336                 debug_print("%% locking passphrase failed\n");
 337 #endif
 338             if (prefs_gpg_get_config()->store_passphrase_timeout > 0) {
 339                     gtk_timeout_add(prefs_gpg_get_config()
 340                                     ->store_passphrase_timeout*60*1000,
 341                                 free_passphrase, NULL);
 342             }
 343         }
 344         debug_print ("%% sending passphrase\n");
 345     }
 346     }
 347
 348 #ifdef G_OS_WIN32
 349     {
 350         /* Under Windows FD is actually a System handle. */
 351         DWORD nwritten;
 352         WriteFile ((HANDLE)fd, pass, strlen (pass), &nwritten, NULL);
 353         WriteFile ((HANDLE)fd, "\n", 1, &nwritten, NULL);
 354     }
 355 #else
 356     write(fd, pass, strlen(pass));
 357     write(fd, "\n", 1);
 358 #endif
 359     return GPG_ERR_NO_ERROR;
 360 }
 361
 362 void gpgmegtk_free_passphrase()
 363 {
 364     (void)free_passphrase(NULL); /* could be inline */
 365 }
 366
 367 #endif /* USE_GPGME */