1 /* passphrase.c - GTK+ based passphrase callback
2 * Copyright (C) 2001-2016 Werner Koch (dd9jn) and the Claws Mail 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 3 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, see <http://www.gnu.org/licenses/>.
16 */
17
18 #ifdef HAVE_CONFIG_H
19 # include <config.h>
20 #endif
21
22 #if USE_GPGME
23
24 #include <glib.h>
25 #include <glib/gi18n.h>
26 #include <gdk/gdk.h>
27 #include <gdk/gdkkeysyms.h>
28 #ifdef GDK_WINDOWING_X11
29 # include <gdk/gdkx.h>
30 #endif /* GDK_WINDOWING_X11 */
31 #include <gtk/gtk.h>
32 #include <string.h>
33 #include <sys/types.h>
34 #ifdef G_OS_WIN32
35 #include <w32lib.h>
36 #else
37 #include <sys/mman.h>
38 #endif
39
40 #include "passphrase.h"
41 #include "prefs_common.h"
42 #include "prefs_gpg.h"
43 #include "manage_window.h"
44 #include "utils.h"
45 #include "mainwindow.h"
46 #include "summaryview.h"
47
48 static gboolean grab_all = FALSE;
49
50 static gboolean pass_ack;
51 static gchar *last_pass = NULL;
52
53 static void passphrase_ok_cb(GtkWidget *widget, gpointer data);
54 static void passphrase_cancel_cb(GtkWidget *widget, gpointer data);
55 static gint passphrase_deleted(GtkWidget *widget, GdkEventAny *event,
56 gpointer data);
57 static gboolean passphrase_key_pressed(GtkWidget *widget, GdkEventKey *event,
58 gpointer data);
59
60 static GtkWidget *create_description(const gchar *uid_hint, gint prev_bad, gint new_key);
61
62 void
gpgmegtk_set_passphrase_grab(gint yes)63 gpgmegtk_set_passphrase_grab(gint yes)
64 {
65 grab_all = yes;
66 }
67
68 gchar*
passphrase_mbox(const gchar * uid_hint,const gchar * pass_hint,gint prev_bad,gint new_key)69 passphrase_mbox(const gchar *uid_hint, const gchar *pass_hint, gint prev_bad, gint new_key)
70 {
71 gchar *the_passphrase = NULL;
72 GtkWidget *vbox, *hbox;
73 GtkWidget *confirm_box;
74 GtkWidget *window;
75 GtkWidget *pass_entry;
76 GtkWidget *ok_button;
77 GtkWidget *cancel_button;
78 GdkWindow *gdkwin;
79
80 SummaryView *summaryview = mainwindow_get_mainwindow()->summaryview;
81
82 gtk_menu_popdown(GTK_MENU(summaryview->popupmenu));
83
84 window = gtkut_window_new(GTK_WINDOW_TOPLEVEL, "passphrase");
85 gtk_window_set_title(GTK_WINDOW(window), _("Passphrase"));
86 gtk_window_set_default_size(GTK_WINDOW(window), 375, 100);
87 gtk_window_set_resizable(GTK_WINDOW(window), TRUE);
88 gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
89 gtk_window_set_type_hint(GTK_WINDOW(window), GDK_WINDOW_TYPE_HINT_DIALOG);
90 gtk_window_set_modal(GTK_WINDOW(window), TRUE);
91 g_signal_connect(G_OBJECT(window), "delete_event",
92 G_CALLBACK(passphrase_deleted), NULL);
93 g_signal_connect(G_OBJECT(window), "key_press_event",
94 G_CALLBACK(passphrase_key_pressed), NULL);
95 MANAGE_WINDOW_SIGNALS_CONNECT(window);
96 manage_window_set_transient(GTK_WINDOW(window));
97
98 vbox = gtk_vbox_new(FALSE, 8);
99 gtk_container_add(GTK_CONTAINER(window), vbox);
100 gtk_container_set_border_width(GTK_CONTAINER(vbox), 8);
101
102 if (uid_hint || pass_hint) {
103 GtkWidget *label, *icon;
104 label = create_description (uid_hint, prev_bad, new_key);
105 icon = gtk_image_new_from_stock(GTK_STOCK_DIALOG_AUTHENTICATION,
106 GTK_ICON_SIZE_DIALOG);
107
108 hbox = gtk_hbox_new (FALSE, 12);
109 gtk_container_set_border_width (GTK_CONTAINER (hbox), 5);
110 gtk_widget_show (hbox);
111 gtk_box_pack_start (GTK_BOX(hbox), icon, FALSE, FALSE, 0);
112 gtk_box_pack_start (GTK_BOX(hbox), label, FALSE, FALSE, 0);
113 gtk_box_pack_start (GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
114 }
115
116 pass_entry = gtk_entry_new();
117 gtk_box_pack_start(GTK_BOX(vbox), pass_entry, FALSE, FALSE, 0);
118 gtk_entry_set_visibility(GTK_ENTRY(pass_entry), FALSE);
119 gtk_widget_grab_focus(pass_entry);
120
121 gtkut_stock_button_set_create(&confirm_box,
122 &cancel_button, GTK_STOCK_CANCEL,
123 &ok_button, GTK_STOCK_OK,
124 NULL, NULL);
125
126 gtk_box_pack_end(GTK_BOX(vbox), confirm_box, FALSE, FALSE, 0);
127 gtk_widget_grab_default(ok_button);
128
129 g_signal_connect(G_OBJECT(ok_button), "clicked",
130 G_CALLBACK(passphrase_ok_cb), NULL);
131 g_signal_connect(G_OBJECT(pass_entry), "activate",
132 G_CALLBACK(passphrase_ok_cb), NULL);
133 g_signal_connect(G_OBJECT(cancel_button), "clicked",
134 G_CALLBACK(passphrase_cancel_cb), NULL);
135
136 gtk_window_set_position (GTK_WINDOW(window), GTK_WIN_POS_CENTER);
137 if (grab_all)
138 gtk_window_set_resizable(GTK_WINDOW(window), FALSE);
139
140 gtk_widget_show_all(window);
141
142 if (grab_all) {
143 int err = 0, cnt = 0;
144 /* make sure that window is viewable */
145 gtk_widget_show_now(window);
146 gdkwin = gtk_widget_get_window(window);
147 gdk_window_process_updates(gdkwin, TRUE);
148 gdk_flush();
149 while(gtk_events_pending()) {
150 gtk_main_iteration();
151 }
152 try_again:
153 if ((err = gdk_pointer_grab(gdkwin, TRUE, 0,
154 gdkwin, NULL, GDK_CURRENT_TIME))) {
155 if (err == GDK_GRAB_NOT_VIEWABLE && cnt < 10) {
156 cnt++;
157 g_warning("trying to grab mouse again");
158 gtk_main_iteration();
159 goto try_again;
160 } else {
161 g_warning("OOPS: Could not grab mouse");
162 gtk_widget_destroy(window);
163 return NULL;
164 }
165 }
166 if (gdk_keyboard_grab(gdkwin, FALSE, GDK_CURRENT_TIME)) {
167 gdk_display_pointer_ungrab(gdk_display_get_default(),
168 GDK_CURRENT_TIME);
169 g_warning("OOPS: Could not grab keyboard");
170 gtk_widget_destroy(window);
171 return NULL;
172 }
173 }
174
175 gtk_main();
176
177 if (grab_all) {
178 gdk_display_keyboard_ungrab(gdk_display_get_default(),
179 GDK_CURRENT_TIME);
180 gdk_display_pointer_ungrab(gdk_display_get_default(), GDK_CURRENT_TIME);
181 gdk_flush();
182 }
183
184 manage_window_focus_out(window, NULL, NULL);
185
186 if (pass_ack) {
187 const gchar *entry_text;
188 entry_text = gtk_entry_get_text(GTK_ENTRY(pass_entry));
189 the_passphrase = g_locale_from_utf8(entry_text, -1, NULL, NULL, NULL);
190 if (the_passphrase == NULL)
191 the_passphrase = g_strdup (entry_text);
192 }
193 gtk_widget_destroy (window);
194
195 return the_passphrase;
196 }
197
198
199 static void
passphrase_ok_cb(GtkWidget * widget,gpointer data)200 passphrase_ok_cb(GtkWidget *widget, gpointer data)
201 {
202 pass_ack = TRUE;
203 gtk_main_quit();
204 }
205
206 static void
passphrase_cancel_cb(GtkWidget * widget,gpointer data)207 passphrase_cancel_cb(GtkWidget *widget, gpointer data)
208 {
209 pass_ack = FALSE;
210 gtk_main_quit();
211 }
212
213
214 static gint
passphrase_deleted(GtkWidget * widget,GdkEventAny * event,gpointer data)215 passphrase_deleted(GtkWidget *widget, GdkEventAny *event, gpointer data)
216 {
217 passphrase_cancel_cb(NULL, NULL);
218 return TRUE;
219 }
220
221
222 static gboolean
passphrase_key_pressed(GtkWidget * widget,GdkEventKey * event,gpointer data)223 passphrase_key_pressed(GtkWidget *widget, GdkEventKey *event, gpointer data)
224 {
225 if (event && event->keyval == GDK_KEY_Escape)
226 passphrase_cancel_cb(NULL, NULL);
227 return FALSE;
228 }
229
230 static gint
linelen(const gchar * s)231 linelen (const gchar *s)
232 {
233 gint i;
234
235 for (i = 0; *s && *s != '\n'; s++, i++)
236 ;
237
238 return i;
239 }
240
241 static GtkWidget *
create_description(const gchar * uid_hint,gint prev_bad,gint new_key)242 create_description(const gchar *uid_hint, gint prev_bad, gint new_key)
243 {
244 const gchar *uid = NULL;
245 gchar *buf;
246 GtkWidget *label;
247 gchar *my_uid = NULL;
248 if (!uid_hint)
249 uid = _("[no user id]");
250 else
251 uid = uid_hint;
252
253 my_uid = g_strdup(uid);
254 while (strchr(my_uid, '<'))
255 *(strchr(my_uid, '<')) = '(';
256 while (strchr(my_uid, '>'))
257 *(strchr(my_uid, '>')) = ')';
258
259 if (new_key == 1) {
260 buf = g_strdup_printf (g_strconcat("<span weight=\"bold\" size=\"larger\">%s",
261 _("Please enter the passphrase for the new key:"),
262 "</span>\n\n%.*s\n", NULL),
263 prev_bad ?
264 _("Passphrases did not match.\n") : "",
265 linelen (my_uid), my_uid);
266 } else if (new_key == 2) {
267 buf = g_strdup_printf (g_strconcat("<span weight=\"bold\" size=\"larger\">",
268 _("Please re-enter the passphrase for the new key:"),
269 "</span>\n\n%.*s\n", NULL),
270 linelen (my_uid), my_uid);
271 } else {
272 buf = g_strdup_printf (g_strconcat("<span weight=\"bold\" size=\"larger\">%s",
273 _("Please enter the passphrase for:"),
274 "</span>\n\n%.*s\n", NULL),
275 prev_bad ?
276 _("Bad passphrase.\n") : "",
277 linelen (my_uid), my_uid);
278 }
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
free_passphrase(gpointer _unused)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
gpgmegtk_passphrase_cb(void * opaque,const char * uid_hint,const char * passphrase_hint,int prev_bad,int fd)304 gpgmegtk_passphrase_cb(void *opaque, const char *uid_hint,
305 const char *passphrase_hint, int prev_bad, int fd)
306 {
307 char *pass = NULL;
308
309 if (prefs_gpg_get_config()->store_passphrase && last_pass && !prev_bad)
310 pass = g_strdup(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, FALSE);
315 gpgmegtk_free_passphrase();
316 if (!pass) {
317 debug_print ("%% cancel passphrase entry\n");
318 if (write(fd, "\n", 1) != 1)
319 debug_print("short write\n");
320
321 return GPG_ERR_CANCELED;
322 }
323 else {
324 if (prefs_gpg_get_config()->store_passphrase) {
325 last_pass = g_strdup(pass);
326 #ifndef G_PLATFORM_WIN32
327 if (mlock(last_pass, strlen(last_pass)) == -1)
328 debug_print("%% locking passphrase failed\n");
329 #endif
330 if (prefs_gpg_get_config()->store_passphrase_timeout > 0) {
331 g_timeout_add(prefs_gpg_get_config()
332 ->store_passphrase_timeout*60*1000,
333 free_passphrase, NULL);
334 }
335 }
336 debug_print ("%% sending passphrase\n");
337 }
338 }
339
340 #ifdef G_OS_WIN32
341 {
342 /* Under Windows FD is actually a System handle. */
343 DWORD nwritten;
344 WriteFile ((HANDLE)fd, pass, strlen (pass), &nwritten, NULL);
345 WriteFile ((HANDLE)fd, "\n", 1, &nwritten, NULL);
346 }
347 #else
348 if (write(fd, pass, strlen(pass)) != strlen(pass))
349 debug_print("short write\n");
350
351 if (write(fd, "\n", 1) != 1)
352 debug_print("short write\n");
353 #endif
354 g_free(pass);
355
356 return GPG_ERR_NO_ERROR;
357 }
358
gpgmegtk_free_passphrase()359 void gpgmegtk_free_passphrase()
360 {
361 (void)free_passphrase(NULL); /* could be inline */
362 }
363
364 #endif /* USE_GPGME */
365