2006-08-14 [cleroy] 2.4.0cvs50
[claws.git] / 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 */