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our own askpass gui
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Jaromil
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650ce60587
332
src/tomb-askpass.c
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332
src/tomb-askpass.c
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/* Tomb askpass
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Derived from gtk-led-askpass.c version 0.9
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by Dafydd Harries <daf@muse.19inch.net>, 2003 2004
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(An ssh-askpass alike software)
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Based on ideas from ssh-askpass-gnome, by Damien Miller and Nalin Dahyabhai,
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and on Jim Knoble's x11-ssh-askpass.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation, Inc.,
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59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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See also:
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http://www.cgabriel.org/sw/gtk2-ssh-askpass/
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-- Jim Knoble's x11-ssh-askpass
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http://www.cgabriel.org/sw/gtk2-ssh-askpass/
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-- Christopher Gabriel's gtk2-ssh-askpass
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Todo:
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- Internationalise. Probably entails autotoolising.
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- Add more eye candy.
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- Implement optional mouse/server grabbing.
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- Alow overriding the title on the command line.
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- Make the LED box a proper GTK+ widget.
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*/
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#include <gdk/gdk.h>
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#include <gtk/gtk.h>
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#include <gdk/gdkkeysyms.h>
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/* The Tomb icon is an artwork by Jordi aka MonMort
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a nomadic graffiti artist from Barcelona */
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#include <monmort.xpm>
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/* Title for the dialog. */
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#define TITLE "Unlocking tomb"
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/* Width of each LED. */
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#define LED_WIDTH 8
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/* Height of each LED. */
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#define LED_HEIGHT 16
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/* Space around and between LEDs. */
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#define LED_MARGIN 5
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/* Number of LEDs to have. */
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#define LED_COUNT 12
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/* How many times to attempt to grab the keyboard before giving up. */
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#define GRAB_TRIES_MAX 10
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/* How long to sleep, in microseconds, in between keyboard grab attempts. */
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#define GRAB_SLEEP 100000
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/* Sleep length, in milliseconds, after Control-U press. */
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#define CLEAR_SLEEP 800
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enum {
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LED_STATE_OFF,
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LED_STATE_GREEN,
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LED_STATE_RED,
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LED_STATES
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};
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GdkPixbuf *pb_monmort;
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GdkColor colours[LED_STATES] = {
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/* LED_STATE_OFF */
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{ 0, 0x3333, 0x6666, 0x3333 },
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/* LED_STATE_GREEN */
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{ 0, 0x6666, 0xFFFF, 0x6666 },
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/* LED_STATE_RED */
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{ 0, 0xDDDD, 0x3333, 0x3333 }
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};
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void draw_led(GtkWidget *widget, gint state, guint offset)
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{
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GdkGC *gc = gdk_gc_new(widget->window);
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/* Draw the border. */
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gdk_draw_rectangle(widget->window,
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widget->style->fg_gc[GTK_WIDGET_STATE(widget)],
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FALSE,
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LED_MARGIN + offset * (LED_WIDTH + LED_MARGIN),
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LED_MARGIN,
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LED_WIDTH,
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LED_HEIGHT);
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gdk_gc_set_rgb_fg_color(gc, &(colours[state]));
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/* Draw the inside rectangle. */
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gdk_draw_rectangle(widget->window,
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gc,
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TRUE,
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LED_MARGIN + offset * (LED_WIDTH + LED_MARGIN) + 1,
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LED_MARGIN + 1,
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LED_WIDTH - 1,
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LED_HEIGHT - 1);
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}
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gboolean led_area_expose_handler(GtkWidget *led_area, GdkEventExpose *event,
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GString *passphrase)
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{
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gint i, width, height;
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gint length = passphrase->len;
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gdk_drawable_get_size(GDK_DRAWABLE(led_area->window), &width, &height);
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/* Draw a focus indicator if appropriate. */
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if (GTK_WIDGET_HAS_FOCUS(led_area))
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gtk_paint_focus(led_area->style, led_area->window,
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GTK_WIDGET_STATE(led_area), &(event->area), led_area,
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"", 0, 0, width, height);
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/* Draw each LED. */
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for (i = 0; i < LED_COUNT; i++) {
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/* This is the complicated bit. */
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gboolean on = ((length / LED_COUNT) % 2 == 0) ?
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(length % LED_COUNT > i) :
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(length % LED_COUNT <= i);
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draw_led(led_area, on ? LED_STATE_GREEN : LED_STATE_OFF, i);
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}
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/* TRUE means not to propagate the event. */
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return TRUE;
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}
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gboolean timeout_handler(GtkWidget *led_area)
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{
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gtk_widget_queue_draw(led_area);
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return FALSE;
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}
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void clear(GString *passphrase, GtkWidget *led_area)
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{
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gint i;
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/*
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Delete bit by bit to ensure erasure. g_string_erase() will overwrite
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the last character with 0, so we shouldn't need to worry about leaving
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sensitive data in memory. Note that the string may be empty. This is
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so that the interface responds consistently.
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*/
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while (passphrase->len > 0)
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g_string_erase(passphrase, passphrase->len - 1, 1);
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for (i = 0; i < LED_COUNT; i++)
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draw_led(led_area, LED_STATE_RED, i);
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/*
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Remove the redness after a delay. If an exposure is triggered, such as
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by a key getting pressed, then the redraw will simply happen early.
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*/
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gtk_timeout_add(CLEAR_SLEEP, (GtkFunction)timeout_handler, led_area);
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}
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gboolean led_area_key_press_handler(GtkWidget *led_area, GdkEventKey *event,
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GString *passphrase) {
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/* Obtain Unicode representation of key released. */
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gunichar c = gdk_keyval_to_unicode(event->keyval);
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/* Determine whether the key released was printable. */
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gint isprint = g_unichar_isprint(c);
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/* Obtain default modifier mask. */
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guint modifiers = gtk_accelerator_get_default_mod_mask();
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if (event->keyval == GDK_Delete) {
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clear(passphrase, led_area);
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return TRUE;
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}
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if ((event->state & modifiers) == GDK_CONTROL_MASK) {
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if (event->keyval == GDK_u) {
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/* C-u -- delete everything. */
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clear(passphrase, led_area);
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/* Return early in order to avoid the redraw. */
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return TRUE;
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} else {
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/* Unrecognised keypress. */
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return FALSE;
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}
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} else if (event->keyval == GDK_BackSpace && passphrase->len > 0) {
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/*
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Backspace -- remove last character. See the comment above
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about g_string_erase.
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*/
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g_string_erase(passphrase, passphrase->len - 1, 1);
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} else if (isprint) {
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/* Printable character. */
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g_string_append_unichar(passphrase, c);
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} else {
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/* Unrecognized keypress, propagate. */
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return FALSE;
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}
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/* Trigger a redraw of the LED area. */
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gtk_widget_queue_draw(led_area);
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/* TRUE means not to propagate the event. */
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return TRUE;
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}
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gboolean led_area_button_press_handler(GtkWidget *led_area,
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GdkEventButton *event, gpointer data)
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{
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gtk_widget_grab_focus(led_area);
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return TRUE;
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}
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int main(int argc, char *argv[])
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{
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gint response, grab_tries, i;
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char keyname[256];
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GString *passphrase = g_string_new("");
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GtkWidget *dialog, *alignment, *led_area;
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GList tmplist;
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gtk_set_locale();
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gtk_init(&argc, &argv);
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if (argc > 1) {
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snprintf(keyname,255,"%s",argv[1]);
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} else {
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sprintf(keyname,"unknown");
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}
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/*
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dialog
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`- vbox (implicit)
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`- aligment
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`- led_area
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*/
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/* Question dialog with no parent; OK and Cancel buttons. */
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dialog = gtk_message_dialog_new_with_markup
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(NULL, 0, GTK_MESSAGE_QUESTION, GTK_BUTTONS_OK,
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"Enter the password to unlock\n"
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"<span font=\"Times 24\">%s</span>", keyname);
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gtk_window_set_title(GTK_WINDOW(dialog), TITLE);
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// set and show the image icon
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pb_monmort = gdk_pixbuf_new_from_xpm_data(monmort);
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tmplist.data = (gpointer*)pb_monmort;
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tmplist.prev = tmplist.next = NULL;
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gtk_window_set_icon_list(GTK_WINDOW(dialog), &tmplist);
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gtk_message_dialog_set_image(GTK_MESSAGE_DIALOG(dialog),
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gtk_image_new_from_pixbuf(pb_monmort));
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/* Place the dialog in the middle of the screen. */
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gtk_window_set_position(GTK_WINDOW(dialog), GTK_WIN_POS_CENTER);
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/* OK is the default action. */
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gtk_dialog_set_default_response(GTK_DIALOG(dialog), GTK_RESPONSE_OK);
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/* Add some spacing within the dialog's vbox. */
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gtk_box_set_spacing(GTK_BOX(GTK_DIALOG(dialog)->vbox), 3);
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/* The alignment widget containing the drawing area. */
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alignment = gtk_alignment_new(0.5, 0.5, 0, 0);
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gtk_container_add(GTK_CONTAINER(GTK_DIALOG(dialog)->vbox), alignment);
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/* The drawing area for the LEDs. */
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led_area = gtk_drawing_area_new();
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gtk_container_add(GTK_CONTAINER(alignment), led_area);
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/* Make the LED widget focusable. */
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GTK_WIDGET_SET_FLAGS(led_area, GTK_CAN_FOCUS);
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/* Make the LED widget focused. */
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gtk_widget_grab_focus(led_area);
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/* Make the LED widget receive key press and button press events. */
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gtk_widget_add_events(led_area,
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GDK_KEY_PRESS_MASK | GDK_BUTTON_PRESS_MASK);
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/* Set a size request. */
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gtk_widget_set_size_request(led_area,
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LED_MARGIN + (LED_WIDTH + LED_MARGIN) * LED_COUNT,
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LED_HEIGHT + LED_MARGIN * 2);
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/* Set up handler for key releases. */
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g_signal_connect(G_OBJECT(led_area), "key_press_event",
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G_CALLBACK(led_area_key_press_handler), passphrase);
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/* Set up handler for button releases. */
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g_signal_connect(G_OBJECT(led_area), "button_press_event",
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G_CALLBACK(led_area_button_press_handler), NULL);
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/* Set up handler for expose events. */
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g_signal_connect(G_OBJECT(led_area), "expose_event",
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G_CALLBACK(led_area_expose_handler), passphrase);
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/* Show all the widgets. */
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gtk_widget_show_all(dialog);
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/* Put the dialog on the screen now for the grab to work. */
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gtk_widget_show_now(dialog);
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/* Grab the keyboard */
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gdk_keyboard_grab(GTK_WIDGET(dialog)->window, FALSE, GDK_CURRENT_TIME);
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/* Make the dialog stay on top. */
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gtk_window_set_keep_above(GTK_WINDOW(dialog), TRUE);
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/* Run the dialog. */
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response = gtk_dialog_run(GTK_DIALOG(dialog));
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/* Ungrab the keyboard. */
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gdk_keyboard_ungrab(GDK_CURRENT_TIME);
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/* If the OK button was pressed, print the passphrase. */
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if (response == GTK_RESPONSE_OK)
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g_print("%s\n", passphrase->str);
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/* Scrub the passphrase, if any. */
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for (i = 0; i < passphrase->len; i++)
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passphrase->str[i] = '\0';
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if (response == GTK_RESPONSE_OK)
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return 0;
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return 1;
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}
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