2005-12-02 [paul] 1.9.100cvs55
[claws.git] / 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 */