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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 | /* |
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". | |
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 |
9b7fcaf0 | 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 | |
36 | * you don't trust your X server. We grab the keyboard always. | |
5fb9865a | 37 | */ |
38 | ||
17f0f4a7 | 39 | /* |
0ceb21d6 | 40 | * Compile with: |
41 | * | |
c4ee4c60 | 42 | * cc `pkg-config --cflags gtk+-2.0` \ |
eee2215e | 43 | * gnome-ssh-askpass2.c -o gnome-ssh-askpass \ |
c4ee4c60 | 44 | * `pkg-config --libs gtk+-2.0` |
0ceb21d6 | 45 | * |
46 | */ | |
17f0f4a7 | 47 | |
48 | #include <stdlib.h> | |
49 | #include <stdio.h> | |
50 | #include <string.h> | |
547c9f30 | 51 | #include <X11/Xlib.h> |
c4ee4c60 | 52 | #include <gtk/gtk.h> |
547c9f30 | 53 | #include <gdk/gdkx.h> |
17f0f4a7 | 54 | |
c4ee4c60 | 55 | static void |
56 | report_failed_grab (const char *what) | |
1e83f2a2 | 57 | { |
58 | GtkWidget *err; | |
59 | ||
c4ee4c60 | 60 | err = gtk_message_dialog_new(NULL, 0, |
61 | GTK_MESSAGE_ERROR, | |
62 | GTK_BUTTONS_CLOSE, | |
63 | "Could not grab %s. " | |
64 | "A malicious client may be eavesdropping " | |
65 | "on your session.", what); | |
1e83f2a2 | 66 | gtk_window_set_position(GTK_WINDOW(err), GTK_WIN_POS_CENTER); |
c4ee4c60 | 67 | gtk_label_set_line_wrap(GTK_LABEL((GTK_MESSAGE_DIALOG(err))->label), |
68 | TRUE); | |
69 | ||
70 | gtk_dialog_run(GTK_DIALOG(err)); | |
1e83f2a2 | 71 | |
c4ee4c60 | 72 | gtk_widget_destroy(err); |
73 | } | |
74 | ||
75 | static void | |
76 | ok_dialog(GtkWidget *entry, gpointer dialog) | |
77 | { | |
78 | g_return_if_fail(GTK_IS_DIALOG(dialog)); | |
79 | gtk_dialog_response(GTK_DIALOG(dialog), GTK_RESPONSE_OK); | |
1e83f2a2 | 80 | } |
81 | ||
eee2215e | 82 | static int |
1e83f2a2 | 83 | passphrase_dialog(char *message) |
17f0f4a7 | 84 | { |
c4ee4c60 | 85 | const char *failed; |
86 | char *passphrase, *local; | |
0ceb21d6 | 87 | char **messages; |
9b7fcaf0 | 88 | int result, i, grab_server, grab_pointer; |
17f0f4a7 | 89 | GtkWidget *dialog, *entry, *label; |
c4ee4c60 | 90 | GdkGrabStatus status; |
17f0f4a7 | 91 | |
90bab5a8 | 92 | grab_server = (getenv("GNOME_SSH_ASKPASS_GRAB_SERVER") != NULL); |
9b7fcaf0 | 93 | grab_pointer = (getenv("GNOME_SSH_ASKPASS_GRAB_POINTER") != NULL); |
5fb9865a | 94 | |
c4ee4c60 | 95 | dialog = gtk_message_dialog_new(NULL, 0, |
96 | GTK_MESSAGE_QUESTION, | |
97 | GTK_BUTTONS_OK_CANCEL, | |
98 | "%s", | |
99 | message); | |
17f0f4a7 | 100 | |
101 | entry = gtk_entry_new(); | |
c4ee4c60 | 102 | gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->vbox), entry, FALSE, |
0ceb21d6 | 103 | FALSE, 0); |
17f0f4a7 | 104 | gtk_entry_set_visibility(GTK_ENTRY(entry), FALSE); |
105 | gtk_widget_grab_focus(entry); | |
c4ee4c60 | 106 | gtk_widget_show(entry); |
547c9f30 | 107 | |
c4ee4c60 | 108 | gtk_window_set_title(GTK_WINDOW(dialog), "OpenSSH"); |
547c9f30 | 109 | gtk_window_set_position (GTK_WINDOW(dialog), GTK_WIN_POS_CENTER); |
c4ee4c60 | 110 | gtk_label_set_line_wrap(GTK_LABEL((GTK_MESSAGE_DIALOG(dialog))->label), |
111 | TRUE); | |
17f0f4a7 | 112 | |
60bed5fd | 113 | /* Make <enter> close dialog */ |
c4ee4c60 | 114 | gtk_dialog_set_default_response(GTK_DIALOG(dialog), GTK_RESPONSE_OK); |
115 | g_signal_connect(G_OBJECT(entry), "activate", | |
116 | G_CALLBACK(ok_dialog), dialog); | |
60bed5fd | 117 | |
c4ee4c60 | 118 | /* Grab focus */ |
119 | gtk_widget_show_now(dialog); | |
120 | if (grab_server) { | |
121 | gdk_x11_grab_server(); | |
122 | } | |
123 | if (grab_pointer) { | |
124 | status = gdk_pointer_grab((GTK_WIDGET(dialog))->window, TRUE, | |
125 | 0, NULL, NULL, GDK_CURRENT_TIME); | |
126 | if (status != GDK_GRAB_SUCCESS) { | |
127 | failed = "mouse"; | |
128 | goto nograb; | |
129 | } | |
130 | } | |
131 | status = gdk_keyboard_grab((GTK_WIDGET(dialog))->window, FALSE, | |
132 | GDK_CURRENT_TIME); | |
133 | if (status != GDK_GRAB_SUCCESS) { | |
134 | failed = "keyboard"; | |
135 | goto nograbkb; | |
136 | } | |
137 | result = gtk_dialog_run(GTK_DIALOG(dialog)); | |
1e83f2a2 | 138 | |
547c9f30 | 139 | /* Ungrab */ |
5fb9865a | 140 | if (grab_server) |
141 | XUngrabServer(GDK_DISPLAY()); | |
9b7fcaf0 | 142 | if (grab_pointer) |
143 | gdk_pointer_ungrab(GDK_CURRENT_TIME); | |
547c9f30 | 144 | gdk_keyboard_ungrab(GDK_CURRENT_TIME); |
145 | gdk_flush(); | |
146 | ||
1e83f2a2 | 147 | /* Report passphrase if user selected OK */ |
c4ee4c60 | 148 | passphrase = g_strdup(gtk_entry_get_text(GTK_ENTRY(entry))); |
149 | if (result == GTK_RESPONSE_OK) { | |
150 | local = g_locale_from_utf8(passphrase, strlen(passphrase), | |
151 | NULL, NULL, NULL); | |
152 | if (local != NULL) { | |
153 | puts(local); | |
154 | memset(local, '\0', strlen(local)); | |
155 | g_free(local); | |
156 | } else { | |
157 | puts(passphrase); | |
158 | } | |
159 | } | |
17f0f4a7 | 160 | |
1e83f2a2 | 161 | /* Zero passphrase in memory */ |
c4ee4c60 | 162 | memset(passphrase, '\b', strlen(passphrase)); |
17f0f4a7 | 163 | gtk_entry_set_text(GTK_ENTRY(entry), passphrase); |
c4ee4c60 | 164 | memset(passphrase, '\0', strlen(passphrase)); |
165 | g_free(passphrase); | |
17f0f4a7 | 166 | |
c4ee4c60 | 167 | gtk_widget_destroy(dialog); |
eee2215e | 168 | return (result == GTK_RESPONSE_OK ? 0 : -1); |
17f0f4a7 | 169 | |
1e83f2a2 | 170 | /* At least one grab failed - ungrab what we got, and report |
171 | the failure to the user. Note that XGrabServer() cannot | |
172 | fail. */ | |
173 | nograbkb: | |
174 | gdk_pointer_ungrab(GDK_CURRENT_TIME); | |
175 | nograb: | |
5fb9865a | 176 | if (grab_server) |
177 | XUngrabServer(GDK_DISPLAY()); | |
c4ee4c60 | 178 | gtk_widget_destroy(dialog); |
1e83f2a2 | 179 | |
c4ee4c60 | 180 | report_failed_grab(failed); |
eee2215e | 181 | |
182 | return (-1); | |
17f0f4a7 | 183 | } |
184 | ||
1e83f2a2 | 185 | int |
186 | main(int argc, char **argv) | |
17f0f4a7 | 187 | { |
17f0f4a7 | 188 | char *message; |
eee2215e | 189 | int result; |
190 | ||
c4ee4c60 | 191 | gtk_init(&argc, &argv); |
17f0f4a7 | 192 | |
c4ee4c60 | 193 | if (argc > 1) { |
194 | message = g_strjoinv(" ", argv + 1); | |
195 | } else { | |
196 | message = g_strdup("Enter your OpenSSH passphrase:"); | |
197 | } | |
17f0f4a7 | 198 | |
1e83f2a2 | 199 | setvbuf(stdout, 0, _IONBF, 0); |
eee2215e | 200 | result = passphrase_dialog(message); |
c4ee4c60 | 201 | g_free(message); |
202 | ||
eee2215e | 203 | return (result); |
17f0f4a7 | 204 | } |