Damien Miller | 44d5b60 | 2002-09-05 16:46:24 +1000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2000-2002 Damien Miller. All rights reserved. |
| 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 | */ |
| 24 | |
| 25 | /* GTK2 support by Nalin Dahyabhai <nalin@redhat.com> */ |
| 26 | |
| 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 | * |
| 32 | * There is only two run-time options: if you set the environment variable |
| 33 | * "GNOME_SSH_ASKPASS_GRAB_SERVER=true" then gnome-ssh-askpass will grab |
| 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. |
| 37 | */ |
| 38 | |
| 39 | /* |
| 40 | * Compile with: |
| 41 | * |
| 42 | * cc `pkg-config --cflags gtk+-2.0` \ |
Damien Miller | 10f3085 | 2002-09-12 14:49:00 +1000 | [diff] [blame] | 43 | * gnome-ssh-askpass2.c -o gnome-ssh-askpass \ |
Damien Miller | 44d5b60 | 2002-09-05 16:46:24 +1000 | [diff] [blame] | 44 | * `pkg-config --libs gtk+-2.0` |
| 45 | * |
| 46 | */ |
| 47 | |
| 48 | #include <stdlib.h> |
| 49 | #include <stdio.h> |
| 50 | #include <string.h> |
| 51 | #include <X11/Xlib.h> |
| 52 | #include <gtk/gtk.h> |
| 53 | #include <gdk/gdkx.h> |
| 54 | |
| 55 | static void |
| 56 | report_failed_grab (const char *what) |
| 57 | { |
| 58 | GtkWidget *err; |
| 59 | |
| 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); |
| 66 | gtk_window_set_position(GTK_WINDOW(err), GTK_WIN_POS_CENTER); |
| 67 | gtk_label_set_line_wrap(GTK_LABEL((GTK_MESSAGE_DIALOG(err))->label), |
| 68 | TRUE); |
| 69 | |
| 70 | gtk_dialog_run(GTK_DIALOG(err)); |
| 71 | |
| 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); |
| 80 | } |
| 81 | |
Damien Miller | 10f3085 | 2002-09-12 14:49:00 +1000 | [diff] [blame] | 82 | static int |
Damien Miller | 44d5b60 | 2002-09-05 16:46:24 +1000 | [diff] [blame] | 83 | passphrase_dialog(char *message) |
| 84 | { |
| 85 | const char *failed; |
| 86 | char *passphrase, *local; |
| 87 | char **messages; |
| 88 | int result, i, grab_server, grab_pointer; |
| 89 | GtkWidget *dialog, *entry, *label; |
| 90 | GdkGrabStatus status; |
| 91 | |
| 92 | grab_server = (getenv("GNOME_SSH_ASKPASS_GRAB_SERVER") != NULL); |
| 93 | grab_pointer = (getenv("GNOME_SSH_ASKPASS_GRAB_POINTER") != NULL); |
| 94 | |
| 95 | dialog = gtk_message_dialog_new(NULL, 0, |
| 96 | GTK_MESSAGE_QUESTION, |
| 97 | GTK_BUTTONS_OK_CANCEL, |
| 98 | "%s", |
| 99 | message); |
| 100 | |
| 101 | entry = gtk_entry_new(); |
| 102 | gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->vbox), entry, FALSE, |
| 103 | FALSE, 0); |
| 104 | gtk_entry_set_visibility(GTK_ENTRY(entry), FALSE); |
| 105 | gtk_widget_grab_focus(entry); |
| 106 | gtk_widget_show(entry); |
| 107 | |
| 108 | gtk_window_set_title(GTK_WINDOW(dialog), "OpenSSH"); |
| 109 | gtk_window_set_position (GTK_WINDOW(dialog), GTK_WIN_POS_CENTER); |
| 110 | gtk_label_set_line_wrap(GTK_LABEL((GTK_MESSAGE_DIALOG(dialog))->label), |
| 111 | TRUE); |
| 112 | |
| 113 | /* Make <enter> close dialog */ |
| 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); |
| 117 | |
| 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)); |
| 138 | |
| 139 | /* Ungrab */ |
| 140 | if (grab_server) |
| 141 | XUngrabServer(GDK_DISPLAY()); |
| 142 | if (grab_pointer) |
| 143 | gdk_pointer_ungrab(GDK_CURRENT_TIME); |
| 144 | gdk_keyboard_ungrab(GDK_CURRENT_TIME); |
| 145 | gdk_flush(); |
| 146 | |
| 147 | /* Report passphrase if user selected OK */ |
| 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 | } |
| 160 | |
| 161 | /* Zero passphrase in memory */ |
| 162 | memset(passphrase, '\b', strlen(passphrase)); |
| 163 | gtk_entry_set_text(GTK_ENTRY(entry), passphrase); |
| 164 | memset(passphrase, '\0', strlen(passphrase)); |
| 165 | g_free(passphrase); |
| 166 | |
| 167 | gtk_widget_destroy(dialog); |
Damien Miller | 10f3085 | 2002-09-12 14:49:00 +1000 | [diff] [blame] | 168 | return (result == GTK_RESPONSE_OK ? 0 : -1); |
Damien Miller | 44d5b60 | 2002-09-05 16:46:24 +1000 | [diff] [blame] | 169 | |
| 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: |
| 176 | if (grab_server) |
| 177 | XUngrabServer(GDK_DISPLAY()); |
| 178 | gtk_widget_destroy(dialog); |
| 179 | |
| 180 | report_failed_grab(failed); |
Damien Miller | 10f3085 | 2002-09-12 14:49:00 +1000 | [diff] [blame] | 181 | |
| 182 | return (-1); |
Damien Miller | 44d5b60 | 2002-09-05 16:46:24 +1000 | [diff] [blame] | 183 | } |
| 184 | |
| 185 | int |
| 186 | main(int argc, char **argv) |
| 187 | { |
| 188 | char *message; |
Damien Miller | 10f3085 | 2002-09-12 14:49:00 +1000 | [diff] [blame] | 189 | int result; |
| 190 | |
Damien Miller | 44d5b60 | 2002-09-05 16:46:24 +1000 | [diff] [blame] | 191 | gtk_init(&argc, &argv); |
| 192 | |
| 193 | if (argc > 1) { |
| 194 | message = g_strjoinv(" ", argv + 1); |
| 195 | } else { |
| 196 | message = g_strdup("Enter your OpenSSH passphrase:"); |
| 197 | } |
| 198 | |
| 199 | setvbuf(stdout, 0, _IONBF, 0); |
Damien Miller | 10f3085 | 2002-09-12 14:49:00 +1000 | [diff] [blame] | 200 | result = passphrase_dialog(message); |
Damien Miller | 44d5b60 | 2002-09-05 16:46:24 +1000 | [diff] [blame] | 201 | g_free(message); |
| 202 | |
Damien Miller | 10f3085 | 2002-09-12 14:49:00 +1000 | [diff] [blame] | 203 | return (result); |
Damien Miller | 44d5b60 | 2002-09-05 16:46:24 +1000 | [diff] [blame] | 204 | } |