aboutsummaryrefslogtreecommitdiff
path: root/src/passphrase.c
blob: f0630888548dd7df6f90d392ee8572a70fe4fce0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
/* passphrase.c - GTK+ based passphrase callback
 *      Copyright (C) 2001 Werner Koch (dd9jn)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#if USE_GPGME

#include <glib.h>
#include <glib/gi18n.h>
#include <gdk/gdktypes.h>
#include <gdk/gdkkeysyms.h>
#include <gdk/gdkdisplay.h>
#ifdef GDK_WINDOWING_X11
#  include <gdk/gdkx.h>
#endif /* GDK_WINDOWING_X11 */
#include <gtk/gtkmain.h>
#include <gtk/gtkwidget.h>
#include <gtk/gtkwindow.h>
#include <gtk/gtkvbox.h>
#include <gtk/gtktable.h>
#include <gtk/gtklabel.h>
#include <gtk/gtkentry.h>
#include <gtk/gtkhbbox.h>
#include <gtk/gtkbutton.h>
#include <gtk/gtksignal.h>
#include <gtk/gtkstock.h>
#include <string.h>
#include <sys/types.h>
#if HAVE_SYS_MMAN_H
#  include <sys/mman.h>
#endif

#ifdef G_OS_WIN32
#  include <windows.h>
#endif

#include "passphrase.h"
#include "prefs_common.h"
#include "manage_window.h"
#include "utils.h"
#include "gtkutils.h"

static gboolean grab_all = FALSE;

static gboolean pass_ack;
static gchar *last_pass = NULL;

static void passphrase_ok_cb(GtkWidget *widget, gpointer data);
static void passphrase_cancel_cb(GtkWidget *widget, gpointer data);
static gint passphrase_deleted(GtkWidget *widget, GdkEventAny *event,
			       gpointer data);
static gboolean passphrase_key_pressed(GtkWidget *widget, GdkEventKey *event,
				       gpointer data);
static gchar* passphrase_mbox(const gchar *uid_hint, const gchar *pass_hint,
			      gint prev_bad);

static GtkWidget *create_description(const gchar *uid_hint,
				     const gchar *pass_hint, gint prev_bad);

void
gpgmegtk_set_passphrase_grab(gint yes)
{
    grab_all = yes;
}

static gchar*
passphrase_mbox(const gchar *uid_hint, const gchar *pass_hint, gint prev_bad)
{
    gchar *the_passphrase = NULL;
    GtkWidget *vbox;
    GtkWidget *confirm_box;
    GtkWidget *window;
    GtkWidget *pass_entry;
    GtkWidget *ok_button;
    GtkWidget *cancel_button;

    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window), _("Passphrase"));
    gtk_widget_set_size_request(window, 450, -1);
    gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
    gtk_window_set_modal(GTK_WINDOW(window), TRUE);
    gtk_window_set_policy(GTK_WINDOW(window), FALSE, FALSE, FALSE);
    g_signal_connect(G_OBJECT(window), "delete_event",
                     G_CALLBACK(passphrase_deleted), NULL);
    g_signal_connect(G_OBJECT(window), "key_press_event",
                     G_CALLBACK(passphrase_key_pressed), NULL);
    MANAGE_WINDOW_SIGNALS_CONNECT(window);
    manage_window_set_transient(GTK_WINDOW(window));

    vbox = gtk_vbox_new(FALSE, 8);
    gtk_container_add(GTK_CONTAINER(window), vbox);
    gtk_container_set_border_width(GTK_CONTAINER(vbox), 8);

    if (uid_hint || pass_hint) {
        GtkWidget *label;
        label = create_description (uid_hint, pass_hint, prev_bad);
        gtk_box_pack_start (GTK_BOX(vbox), label, FALSE, FALSE, 0);
    }

    pass_entry = gtk_entry_new();
    gtk_box_pack_start(GTK_BOX(vbox), pass_entry, FALSE, FALSE, 0);
    gtk_entry_set_visibility(GTK_ENTRY(pass_entry), FALSE);
    gtk_widget_grab_focus(pass_entry);

    gtkut_stock_button_set_create(&confirm_box, &ok_button, GTK_STOCK_OK,
				  &cancel_button, GTK_STOCK_CANCEL,
				  NULL, NULL);
    gtk_box_pack_end(GTK_BOX(vbox), confirm_box, FALSE, FALSE, 0);
    gtk_widget_grab_default(ok_button);

    g_signal_connect(G_OBJECT(ok_button), "clicked",
                     G_CALLBACK(passphrase_ok_cb), NULL);
    g_signal_connect(G_OBJECT(pass_entry), "activate",
                     G_CALLBACK(passphrase_ok_cb), NULL);
    g_signal_connect(G_OBJECT(cancel_button), "clicked",
                     G_CALLBACK(passphrase_cancel_cb), NULL);

    gtk_window_set_position (GTK_WINDOW(window), GTK_WIN_POS_CENTER);
    if (grab_all)   
        gtk_window_set_policy (GTK_WINDOW(window), FALSE, FALSE, TRUE);
    
    gtk_widget_show_all(window);

    if (grab_all) {
        /* make sure that window is viewable
	 * FIXME: this is still not enough */
        gtk_widget_show_now(window);
	gdk_flush();
#ifdef GDK_WINDOWING_X11
	gdk_x11_display_grab(gdk_display_get_default());
#endif /* GDK_WINDOWING_X11 */
        if (gdk_pointer_grab(window->window, TRUE, 0,
                             window->window, NULL, GDK_CURRENT_TIME)) {
#ifdef GDK_WINDOWING_X11
            gdk_x11_display_ungrab(gdk_display_get_default());
#endif /* GDK_WINDOWING_X11 */
            g_warning("OOPS: Could not grab mouse\n");
            gtk_widget_destroy(window);
            return NULL;
        }
        if (gdk_keyboard_grab(window->window, FALSE, GDK_CURRENT_TIME)) {
            gdk_display_pointer_ungrab(gdk_display_get_default(),
			 	       GDK_CURRENT_TIME);
#ifdef GDK_WINDOWING_X11
            gdk_x11_display_ungrab(gdk_display_get_default());
#endif /* GDK_WINDOWING_X11 */
            g_warning("OOPS: Could not grab keyboard\n");
            gtk_widget_destroy(window);
            return NULL;
        }
    }

    gtk_main();

    if (grab_all) {
        gdk_display_keyboard_ungrab(gdk_display_get_default(),
				    GDK_CURRENT_TIME);
        gdk_display_pointer_ungrab(gdk_display_get_default(), GDK_CURRENT_TIME);
#ifdef GDK_WINDOWING_X11
        gdk_x11_display_ungrab(gdk_display_get_default());
#endif /* GDK_WINDOWING_X11 */
        gdk_flush();
    }

    manage_window_focus_out(window, NULL, NULL);

    if (pass_ack) {
        const gchar *entry_text;
        entry_text = gtk_entry_get_text(GTK_ENTRY(pass_entry));
        the_passphrase = g_locale_from_utf8(entry_text, -1, NULL, NULL, NULL);
        if (!the_passphrase)
            the_passphrase = g_strdup(entry_text);
    }
    gtk_widget_destroy(window);

    return the_passphrase;
}


static void 
passphrase_ok_cb(GtkWidget *widget, gpointer data)
{
    pass_ack = TRUE;
    gtk_main_quit();
}

static void 
passphrase_cancel_cb(GtkWidget *widget, gpointer data)
{
    pass_ack = FALSE;
    gtk_main_quit();
}


static gint
passphrase_deleted(GtkWidget *widget, GdkEventAny *event, gpointer data)
{
    passphrase_cancel_cb(NULL, NULL);
    return TRUE;
}


static gboolean
passphrase_key_pressed(GtkWidget *widget, GdkEventKey *event, gpointer data)
{
    if (event && event->keyval == GDK_Escape)
        passphrase_cancel_cb(NULL, NULL);
    return FALSE;
}

static gint 
linelen (const gchar *s)
{
    gint i;

    for (i = 0; *s && *s != '\n'; s++, i++)
        ;

    return i;
}

static GtkWidget *
create_description(const gchar *uid_hint, const gchar *pass_hint, gint prev_bad)
{
    const gchar *uid = NULL, *info = NULL;
    gchar *buf;
    GtkWidget *label;

    if (!uid_hint)
        uid = _("[no user id]");
    else
        uid = uid_hint;
    if (!pass_hint)
        info = "";
    else
        info = pass_hint;

    buf = g_strdup_printf (_("%sPlease enter the passphrase for:\n\n"
                           "  %.*s  \n"
                           "(%.*s)\n"),
                           prev_bad ?
                           _("Bad passphrase! Try again...\n\n") : "",
                           linelen (uid), uid, linelen (info), info);

    label = gtk_label_new (buf);
    gtk_label_set_justify (GTK_LABEL (label), GTK_JUSTIFY_LEFT);
    g_free (buf);

    return label;
}

static int free_passphrase(gpointer _unused)
{
    if (last_pass != NULL) {
#if HAVE_MLOCK
        munlock(last_pass, strlen(last_pass));
#endif
        g_free(last_pass);
        last_pass = NULL;
        debug_print("%% passphrase removed\n");
    }
    
    return FALSE;
}

gpgme_error_t
gpgmegtk_passphrase_cb(void *opaque, const char *uid_hint,
        const char *passphrase_hint, int prev_bad, int fd)
{
    const char *pass;
#ifdef G_OS_WIN32
    HANDLE hd = (HANDLE)fd;
    DWORD n;
#endif

    if (prefs_common.store_passphrase && last_pass != NULL && !prev_bad) {
#ifdef G_OS_WIN32
        WriteFile(hd, last_pass, strlen(last_pass), &n, NULL);
        WriteFile(hd, "\n", 1, &n, NULL);
#else
        write(fd, last_pass, strlen(last_pass));
        write(fd, "\n", 1);
#endif
        return GPG_ERR_NO_ERROR;
    }
    gpgmegtk_set_passphrase_grab (prefs_common.passphrase_grab);
    debug_print ("%% requesting passphrase for `%s':\n", uid_hint);
    pass = passphrase_mbox (uid_hint, passphrase_hint, prev_bad);
    gpgmegtk_free_passphrase();
    if (!pass) {
        debug_print ("%% cancel passphrase entry\n");
#ifdef G_OS_WIN32
        WriteFile(hd, "\n", 1, &n, NULL);
        CloseHandle(hd); /* somehow it will block without this */
#else
        write(fd, "\n", 1);
#endif
        return GPG_ERR_CANCELED;
    }
    else {
        if (prefs_common.store_passphrase) {
            last_pass = g_strdup(pass);
#if HAVE_MLOCK
            if (mlock(last_pass, strlen(last_pass)) == -1)
                debug_print("%% locking passphrase failed\n");
#endif

            if (prefs_common.store_passphrase_timeout > 0) {
                g_timeout_add_full(G_PRIORITY_LOW, prefs_common.store_passphrase_timeout * 60 * 1000, free_passphrase, NULL, NULL);
            }
        }
        debug_print ("%% sending passphrase\n");
    }
#ifdef G_OS_WIN32
    WriteFile(hd, pass, strlen(pass), &n, NULL);
    WriteFile(hd, "\n", 1, &n, NULL);
#else
    write(fd, pass, strlen(pass));
    write(fd, "\n", 1);
#endif
    return GPG_ERR_NO_ERROR;
}

void gpgmegtk_free_passphrase()
{
    (void)free_passphrase(NULL); // could be inline
}

#endif /* USE_GPGME */