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13652e52 | 1 | /* |
9b7fcaf0 | 2 | * Copyright (c) 2000-2002 Damien Miller. All rights reserved. |
0ceb21d6 | 3 | * |
4 | * Redistribution and use in source and binary forms, with or without | |
5 | * modification, are permitted provided that the following conditions | |
6 | * are met: | |
7 | * 1. Redistributions of source code must retain the above copyright | |
8 | * notice, this list of conditions and the following disclaimer. | |
9 | * 2. Redistributions in binary form must reproduce the above copyright | |
10 | * notice, this list of conditions and the following disclaimer in the | |
11 | * documentation and/or other materials provided with the distribution. | |
12 | * | |
13 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
15 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
16 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
17 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
18 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
19 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
20 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
21 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
22 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
23 | */ | |
13652e52 | 24 | |
c4ee4c60 | 25 | /* GTK2 support by Nalin Dahyabhai <nalin@redhat.com> */ |
26 | ||
5fb9865a | 27 | /* |
aff51935 | 28 | * This is a simple GNOME SSH passphrase grabber. To use it, set the |
29 | * environment variable SSH_ASKPASS to point to the location of | |
30 | * gnome-ssh-askpass before calling "ssh-add < /dev/null". | |
5fb9865a | 31 | * |
9b7fcaf0 | 32 | * There is only two run-time options: if you set the environment variable |
90bab5a8 | 33 | * "GNOME_SSH_ASKPASS_GRAB_SERVER=true" then gnome-ssh-askpass will grab |
aff51935 | 34 | * the X server. If you set "GNOME_SSH_ASKPASS_GRAB_POINTER=true", then the |
35 | * pointer will be grabbed too. These may have some benefit to security if | |
9b7fcaf0 | 36 | * you don't trust your X server. We grab the keyboard always. |
5fb9865a | 37 | */ |
38 | ||
b2d033b4 | 39 | #define GRAB_TRIES 16 |
40 | #define GRAB_WAIT 250 /* milliseconds */ | |
41 | ||
17f0f4a7 | 42 | /* |
0ceb21d6 | 43 | * Compile with: |
44 | * | |
b2d033b4 | 45 | * cc -Wall `pkg-config --cflags gtk+-2.0` \ |
eee2215e | 46 | * gnome-ssh-askpass2.c -o gnome-ssh-askpass \ |
c4ee4c60 | 47 | * `pkg-config --libs gtk+-2.0` |
0ceb21d6 | 48 | * |
49 | */ | |
17f0f4a7 | 50 | |
51 | #include <stdlib.h> | |
52 | #include <stdio.h> | |
53 | #include <string.h> | |
b2d033b4 | 54 | #include <unistd.h> |
547c9f30 | 55 | #include <X11/Xlib.h> |
c4ee4c60 | 56 | #include <gtk/gtk.h> |
547c9f30 | 57 | #include <gdk/gdkx.h> |
17f0f4a7 | 58 | |
c4ee4c60 | 59 | static void |
60 | report_failed_grab (const char *what) | |
1e83f2a2 | 61 | { |
62 | GtkWidget *err; | |
63 | ||
c4ee4c60 | 64 | err = gtk_message_dialog_new(NULL, 0, |
65 | GTK_MESSAGE_ERROR, | |
66 | GTK_BUTTONS_CLOSE, | |
67 | "Could not grab %s. " | |
68 | "A malicious client may be eavesdropping " | |
69 | "on your session.", what); | |
1e83f2a2 | 70 | gtk_window_set_position(GTK_WINDOW(err), GTK_WIN_POS_CENTER); |
c4ee4c60 | 71 | gtk_label_set_line_wrap(GTK_LABEL((GTK_MESSAGE_DIALOG(err))->label), |
72 | TRUE); | |
73 | ||
74 | gtk_dialog_run(GTK_DIALOG(err)); | |
1e83f2a2 | 75 | |
c4ee4c60 | 76 | gtk_widget_destroy(err); |
77 | } | |
78 | ||
79 | static void | |
80 | ok_dialog(GtkWidget *entry, gpointer dialog) | |
81 | { | |
82 | g_return_if_fail(GTK_IS_DIALOG(dialog)); | |
83 | gtk_dialog_response(GTK_DIALOG(dialog), GTK_RESPONSE_OK); | |
1e83f2a2 | 84 | } |
85 | ||
eee2215e | 86 | static int |
1e83f2a2 | 87 | passphrase_dialog(char *message) |
17f0f4a7 | 88 | { |
c4ee4c60 | 89 | const char *failed; |
90 | char *passphrase, *local; | |
b2d033b4 | 91 | int result, grab_tries, grab_server, grab_pointer; |
92 | GtkWidget *dialog, *entry; | |
c4ee4c60 | 93 | GdkGrabStatus status; |
17f0f4a7 | 94 | |
90bab5a8 | 95 | grab_server = (getenv("GNOME_SSH_ASKPASS_GRAB_SERVER") != NULL); |
9b7fcaf0 | 96 | grab_pointer = (getenv("GNOME_SSH_ASKPASS_GRAB_POINTER") != NULL); |
b2d033b4 | 97 | grab_tries = 0; |
5fb9865a | 98 | |
c4ee4c60 | 99 | dialog = gtk_message_dialog_new(NULL, 0, |
100 | GTK_MESSAGE_QUESTION, | |
101 | GTK_BUTTONS_OK_CANCEL, | |
102 | "%s", | |
103 | message); | |
17f0f4a7 | 104 | |
105 | entry = gtk_entry_new(); | |
aff51935 | 106 | gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->vbox), entry, FALSE, |
0ceb21d6 | 107 | FALSE, 0); |
17f0f4a7 | 108 | gtk_entry_set_visibility(GTK_ENTRY(entry), FALSE); |
109 | gtk_widget_grab_focus(entry); | |
c4ee4c60 | 110 | gtk_widget_show(entry); |
547c9f30 | 111 | |
c4ee4c60 | 112 | gtk_window_set_title(GTK_WINDOW(dialog), "OpenSSH"); |
547c9f30 | 113 | gtk_window_set_position (GTK_WINDOW(dialog), GTK_WIN_POS_CENTER); |
29317db4 | 114 | gtk_window_set_keep_above(GTK_WINDOW(dialog), TRUE); |
c4ee4c60 | 115 | gtk_label_set_line_wrap(GTK_LABEL((GTK_MESSAGE_DIALOG(dialog))->label), |
116 | TRUE); | |
17f0f4a7 | 117 | |
60bed5fd | 118 | /* Make <enter> close dialog */ |
c4ee4c60 | 119 | gtk_dialog_set_default_response(GTK_DIALOG(dialog), GTK_RESPONSE_OK); |
120 | g_signal_connect(G_OBJECT(entry), "activate", | |
121 | G_CALLBACK(ok_dialog), dialog); | |
60bed5fd | 122 | |
e5a1e421 | 123 | gtk_window_set_keep_above(GTK_WINDOW(dialog), TRUE); |
124 | ||
c4ee4c60 | 125 | /* Grab focus */ |
126 | gtk_widget_show_now(dialog); | |
c4ee4c60 | 127 | if (grab_pointer) { |
b2d033b4 | 128 | for(;;) { |
129 | status = gdk_pointer_grab( | |
aff51935 | 130 | (GTK_WIDGET(dialog))->window, TRUE, 0, NULL, |
b2d033b4 | 131 | NULL, GDK_CURRENT_TIME); |
132 | if (status == GDK_GRAB_SUCCESS) | |
133 | break; | |
134 | usleep(GRAB_WAIT * 1000); | |
135 | if (++grab_tries > GRAB_TRIES) { | |
136 | failed = "mouse"; | |
137 | goto nograb; | |
138 | } | |
c4ee4c60 | 139 | } |
140 | } | |
b2d033b4 | 141 | for(;;) { |
142 | status = gdk_keyboard_grab((GTK_WIDGET(dialog))->window, | |
143 | FALSE, GDK_CURRENT_TIME); | |
144 | if (status == GDK_GRAB_SUCCESS) | |
145 | break; | |
146 | usleep(GRAB_WAIT * 1000); | |
147 | if (++grab_tries > GRAB_TRIES) { | |
148 | failed = "keyboard"; | |
149 | goto nograbkb; | |
150 | } | |
c4ee4c60 | 151 | } |
b2d033b4 | 152 | if (grab_server) { |
153 | gdk_x11_grab_server(); | |
154 | } | |
155 | ||
c4ee4c60 | 156 | result = gtk_dialog_run(GTK_DIALOG(dialog)); |
1e83f2a2 | 157 | |
547c9f30 | 158 | /* Ungrab */ |
5fb9865a | 159 | if (grab_server) |
160 | XUngrabServer(GDK_DISPLAY()); | |
9b7fcaf0 | 161 | if (grab_pointer) |
162 | gdk_pointer_ungrab(GDK_CURRENT_TIME); | |
547c9f30 | 163 | gdk_keyboard_ungrab(GDK_CURRENT_TIME); |
164 | gdk_flush(); | |
165 | ||
1e83f2a2 | 166 | /* Report passphrase if user selected OK */ |
c4ee4c60 | 167 | passphrase = g_strdup(gtk_entry_get_text(GTK_ENTRY(entry))); |
168 | if (result == GTK_RESPONSE_OK) { | |
169 | local = g_locale_from_utf8(passphrase, strlen(passphrase), | |
170 | NULL, NULL, NULL); | |
171 | if (local != NULL) { | |
172 | puts(local); | |
173 | memset(local, '\0', strlen(local)); | |
174 | g_free(local); | |
175 | } else { | |
176 | puts(passphrase); | |
177 | } | |
178 | } | |
17f0f4a7 | 179 | |
1e83f2a2 | 180 | /* Zero passphrase in memory */ |
c4ee4c60 | 181 | memset(passphrase, '\b', strlen(passphrase)); |
17f0f4a7 | 182 | gtk_entry_set_text(GTK_ENTRY(entry), passphrase); |
c4ee4c60 | 183 | memset(passphrase, '\0', strlen(passphrase)); |
184 | g_free(passphrase); | |
17f0f4a7 | 185 | |
c4ee4c60 | 186 | gtk_widget_destroy(dialog); |
eee2215e | 187 | return (result == GTK_RESPONSE_OK ? 0 : -1); |
17f0f4a7 | 188 | |
1e83f2a2 | 189 | /* At least one grab failed - ungrab what we got, and report |
190 | the failure to the user. Note that XGrabServer() cannot | |
191 | fail. */ | |
192 | nograbkb: | |
193 | gdk_pointer_ungrab(GDK_CURRENT_TIME); | |
194 | nograb: | |
5fb9865a | 195 | if (grab_server) |
196 | XUngrabServer(GDK_DISPLAY()); | |
c4ee4c60 | 197 | gtk_widget_destroy(dialog); |
1e83f2a2 | 198 | |
c4ee4c60 | 199 | report_failed_grab(failed); |
eee2215e | 200 | |
201 | return (-1); | |
17f0f4a7 | 202 | } |
203 | ||
1e83f2a2 | 204 | int |
205 | main(int argc, char **argv) | |
17f0f4a7 | 206 | { |
17f0f4a7 | 207 | char *message; |
eee2215e | 208 | int result; |
209 | ||
c4ee4c60 | 210 | gtk_init(&argc, &argv); |
17f0f4a7 | 211 | |
c4ee4c60 | 212 | if (argc > 1) { |
213 | message = g_strjoinv(" ", argv + 1); | |
214 | } else { | |
215 | message = g_strdup("Enter your OpenSSH passphrase:"); | |
216 | } | |
17f0f4a7 | 217 | |
1e83f2a2 | 218 | setvbuf(stdout, 0, _IONBF, 0); |
eee2215e | 219 | result = passphrase_dialog(message); |
c4ee4c60 | 220 | g_free(message); |
221 | ||
eee2215e | 222 | return (result); |
17f0f4a7 | 223 | } |