* See LICENSE for licensing information
*
*/
+#include <config.h>
+
#include <stdio.h>
#include <stdlib.h>
#include <pwd.h>
#include <xcb/xcb.h>
#include <xcb/xkb.h>
#include <err.h>
+#include <errno.h>
#include <assert.h>
+#ifdef __OpenBSD__
+#include <bsd_auth.h>
+#else
#include <security/pam_appl.h>
+#endif
#include <getopt.h>
#include <string.h>
#include <ev.h>
#include <xkbcommon/xkbcommon-x11.h>
#include <cairo.h>
#include <cairo/cairo-xcb.h>
+#ifdef __OpenBSD__
+#include <strings.h> /* explicit_bzero(3) */
+#endif
+#include <xcb/xcb_aux.h>
+#include <xcb/randr.h>
#include "i3lock.h"
#include "xcb.h"
#include "cursors.h"
#include "unlock_indicator.h"
-#include "xinerama.h"
+#include "randr.h"
+#include "dpi.h"
#define TSTAMP_N_SECS(n) (n * 1.0)
#define TSTAMP_N_MINS(n) (60 * TSTAMP_N_SECS(n))
uint32_t last_resolution[2];
xcb_window_t win;
static xcb_cursor_t cursor;
+#ifndef __OpenBSD__
static pam_handle_t *pam_handle;
+#endif
int input_position = 0;
/* Holds the password you enter (in UTF-8). */
static char password[512];
char *modifier_string = NULL;
static bool dont_fork = false;
struct ev_loop *main_loop;
-static struct ev_timer *clear_pam_wrong_timeout;
+static struct ev_timer *clear_auth_wrong_timeout;
static struct ev_timer *clear_indicator_timeout;
static struct ev_timer *discard_passwd_timeout;
extern unlock_state_t unlock_state;
-extern pam_state_t pam_state;
+extern auth_state_t auth_state;
int failed_attempts = 0;
bool show_failed_attempts = false;
bool retry_verification = false;
static struct xkb_compose_state *xkb_compose_state;
static uint8_t xkb_base_event;
static uint8_t xkb_base_error;
+static int randr_base = -1;
cairo_surface_t *img = NULL;
bool tile = false;
*
*/
static void clear_password_memory(void) {
+#ifdef __OpenBSD__
+ /* Use explicit_bzero(3) which was explicitly designed not to be
+ * optimized out by the compiler. */
+ explicit_bzero(password, strlen(password));
+#else
/* A volatile pointer to the password buffer to prevent the compiler from
* optimizing this out. */
volatile char *vpassword = password;
- for (int c = 0; c < sizeof(password); c++)
+ for (size_t c = 0; c < sizeof(password); c++)
/* We store a non-random pattern which consists of the (irrelevant)
* index plus (!) the value of the beep variable. This prevents the
* compiler from optimizing the calls away, since the value of 'beep'
* is not known at compile-time. */
vpassword[c] = c + (int)beep;
+#endif
}
ev_timer *start_timer(ev_timer *timer_obj, ev_tstamp timeout, ev_callback_t callback) {
}
/*
- * Resets pam_state to STATE_PAM_IDLE 2 seconds after an unsuccessful
+ * Resets auth_state to STATE_AUTH_IDLE 2 seconds after an unsuccessful
* authentication event.
*
*/
-static void clear_pam_wrong(EV_P_ ev_timer *w, int revents) {
- DEBUG("clearing pam wrong\n");
- pam_state = STATE_PAM_IDLE;
+static void clear_auth_wrong(EV_P_ ev_timer *w, int revents) {
+ DEBUG("clearing auth wrong\n");
+ auth_state = STATE_AUTH_IDLE;
redraw_screen();
/* Clear modifier string. */
}
/* Now free this timeout. */
- STOP_TIMER(clear_pam_wrong_timeout);
+ STOP_TIMER(clear_auth_wrong_timeout);
- /* retry with input done during pam verification */
+ /* retry with input done during auth verification */
if (retry_verification) {
retry_verification = false;
finish_input();
}
static void input_done(void) {
- STOP_TIMER(clear_pam_wrong_timeout);
- pam_state = STATE_PAM_VERIFY;
+ STOP_TIMER(clear_auth_wrong_timeout);
+ auth_state = STATE_AUTH_VERIFY;
unlock_state = STATE_STARTED;
redraw_screen();
+#ifdef __OpenBSD__
+ struct passwd *pw;
+
+ if (!(pw = getpwuid(getuid())))
+ errx(1, "unknown uid %u.", getuid());
+
+ if (auth_userokay(pw->pw_name, NULL, NULL, password) != 0) {
+ DEBUG("successfully authenticated\n");
+ clear_password_memory();
+
+ ev_break(EV_DEFAULT, EVBREAK_ALL);
+ return;
+ }
+#else
if (pam_authenticate(pam_handle, 0) == PAM_SUCCESS) {
DEBUG("successfully authenticated\n");
clear_password_memory();
pam_setcred(pam_handle, PAM_REFRESH_CRED);
pam_end(pam_handle, PAM_SUCCESS);
- exit(0);
+ ev_break(EV_DEFAULT, EVBREAK_ALL);
+ return;
}
+#endif
if (debug_mode)
fprintf(stderr, "Authentication failure\n");
/* Get state of Caps and Num lock modifiers, to be displayed in
- * STATE_PAM_WRONG state */
+ * STATE_AUTH_WRONG state */
xkb_mod_index_t idx, num_mods;
const char *mod_name;
}
}
- pam_state = STATE_PAM_WRONG;
+ auth_state = STATE_AUTH_WRONG;
failed_attempts += 1;
clear_input();
if (unlock_indicator)
/* Clear this state after 2 seconds (unless the user enters another
* password during that time). */
ev_now_update(main_loop);
- START_TIMER(clear_pam_wrong_timeout, TSTAMP_N_SECS(2), clear_pam_wrong);
+ START_TIMER(clear_auth_wrong_timeout, TSTAMP_N_SECS(2), clear_auth_wrong);
/* Cancel the clear_indicator_timeout, it would hide the unlock indicator
* too early. */
switch (ksym) {
case XKB_KEY_j:
+ case XKB_KEY_m:
case XKB_KEY_Return:
case XKB_KEY_KP_Enter:
case XKB_KEY_XF86ScreenSaver:
- if (ksym == XKB_KEY_j && !ctrl)
+ if ((ksym == XKB_KEY_j || ksym == XKB_KEY_m) && !ctrl)
break;
- if (pam_state == STATE_PAM_WRONG) {
+ if (auth_state == STATE_AUTH_WRONG) {
retry_verification = true;
return;
}
ksym == XKB_KEY_Escape) {
DEBUG("C-u pressed\n");
clear_input();
- /* Hide the unlock indicator after a bit if the password buffer is
- * empty. */
- if (unlock_indicator) {
- START_TIMER(clear_indicator_timeout, 1.0, clear_indicator_cb);
- unlock_state = STATE_BACKSPACE_ACTIVE;
- redraw_screen();
- unlock_state = STATE_KEY_PRESSED;
- }
+ /* Also hide the unlock indicator */
+ if (unlock_indicator)
+ clear_indicator();
return;
}
break;
if (ksym == XKB_KEY_h && !ctrl)
break;
- if (input_position == 0)
+ if (input_position == 0) {
+ START_TIMER(clear_indicator_timeout, 1.0, clear_indicator_cb);
+ unlock_state = STATE_NOTHING_TO_DELETE;
+ redraw_screen();
return;
+ }
/* decrement input_position to point to the previous glyph */
u8_dec(password, &input_position);
return;
}
- if ((input_position + 8) >= sizeof(password))
+ if ((input_position + 8) >= (int)sizeof(password))
return;
#if 0
xcb_configure_window(conn, win, mask, last_resolution);
xcb_flush(conn);
- xinerama_query_screens();
+ randr_query(screen->root);
redraw_screen();
}
+static bool verify_png_image(const char *image_path) {
+ if (!image_path) {
+ return false;
+ }
+
+ /* Check file exists and has correct PNG header */
+ FILE *png_file = fopen(image_path, "r");
+ if (png_file == NULL) {
+ fprintf(stderr, "Image file path \"%s\" cannot be opened: %s\n", image_path, strerror(errno));
+ return false;
+ }
+ unsigned char png_header[8];
+ memset(png_header, '\0', sizeof(png_header));
+ int bytes_read = fread(png_header, 1, sizeof(png_header), png_file);
+ fclose(png_file);
+ if (bytes_read != sizeof(png_header)) {
+ fprintf(stderr, "Could not read PNG header from \"%s\"\n", image_path);
+ return false;
+ }
+
+ // Check PNG header according to the specification, available at:
+ // https://www.w3.org/TR/2003/REC-PNG-20031110/#5PNG-file-signature
+ static unsigned char PNG_REFERENCE_HEADER[8] = {137, 80, 78, 71, 13, 10, 26, 10};
+ if (memcmp(PNG_REFERENCE_HEADER, png_header, sizeof(png_header)) != 0) {
+ fprintf(stderr, "File \"%s\" does not start with a PNG header. i3lock currently only supports loading PNG files.\n", image_path);
+ return false;
+ }
+ return true;
+}
+
+#ifndef __OpenBSD__
/*
* Callback function for PAM. We only react on password request callbacks.
*
return 0;
}
+#endif
/*
* This callback is only a dummy, see xcb_prepare_cb and xcb_check_cb.
break;
default:
- if (type == xkb_base_event)
+ if (type == xkb_base_event) {
process_xkb_event(event);
+ }
+ if (randr_base > -1 &&
+ type == randr_base + XCB_RANDR_SCREEN_CHANGE_NOTIFY) {
+ randr_query(screen->root);
+ handle_screen_resize();
+ }
}
free(event);
/*
* This function is called from a fork()ed child and will raise the i3lock
* window when the window is obscured, even when the main i3lock process is
- * blocked due to PAM.
+ * blocked due to the authentication backend.
*
*/
static void raise_loop(xcb_window_t window) {
xcb_generic_event_t *event;
int screens;
- if ((conn = xcb_connect(NULL, &screens)) == NULL ||
- xcb_connection_has_error(conn))
+ if (xcb_connection_has_error((conn = xcb_connect(NULL, &screens))) > 0)
errx(EXIT_FAILURE, "Cannot open display\n");
/* We need to know about the window being obscured or getting destroyed. */
struct passwd *pw;
char *username;
char *image_path = NULL;
+#ifndef __OpenBSD__
int ret;
struct pam_conv conv = {conv_callback, NULL};
+#endif
int curs_choice = CURS_NONE;
int o;
- int optind = 0;
+ int longoptind = 0;
struct option longopts[] = {
{"version", no_argument, NULL, 'v'},
{"nofork", no_argument, NULL, 'n'},
errx(EXIT_FAILURE, "pw->pw_name is NULL.\n");
char *optstring = "hvnbdc:p:ui:teI:f";
- while ((o = getopt_long(argc, argv, optstring, longopts, &optind)) != -1) {
+ while ((o = getopt_long(argc, argv, optstring, longopts, &longoptind)) != -1) {
switch (o) {
case 'v':
- errx(EXIT_SUCCESS, "version " VERSION " © 2010 Michael Stapelberg");
+ errx(EXIT_SUCCESS, "version " I3LOCK_VERSION " © 2010 Michael Stapelberg");
case 'n':
dont_fork = true;
break;
ignore_empty_password = true;
break;
case 0:
- if (strcmp(longopts[optind].name, "debug") == 0)
+ if (strcmp(longopts[longoptind].name, "debug") == 0)
debug_mode = true;
break;
case 'f':
* the unlock indicator upon keypresses. */
srand(time(NULL));
+#ifndef __OpenBSD__
/* Initialize PAM */
if ((ret = pam_start("i3lock", username, &conv, &pam_handle)) != PAM_SUCCESS)
errx(EXIT_FAILURE, "PAM: %s", pam_strerror(pam_handle, ret));
if ((ret = pam_set_item(pam_handle, PAM_TTY, getenv("DISPLAY"))) != PAM_SUCCESS)
errx(EXIT_FAILURE, "PAM: %s", pam_strerror(pam_handle, ret));
+#endif
-/* Using mlock() as non-super-user seems only possible in Linux. Users of other
- * operating systems should use encrypted swap/no swap (or remove the ifdef and
- * run i3lock as super-user). */
+/* Using mlock() as non-super-user seems only possible in Linux.
+ * Users of other operating systems should use encrypted swap/no swap
+ * (or remove the ifdef and run i3lock as super-user).
+ * Alas, swap is encrypted by default on OpenBSD so swapping out
+ * is not necessarily an issue. */
#if defined(__linux__)
/* Lock the area where we store the password in memory, we don’t want it to
* be swapped to disk. Since Linux 2.6.9, this does not require any
errx(EXIT_FAILURE, "Could not load keymap");
const char *locale = getenv("LC_ALL");
- if (!locale)
+ if (!locale || !*locale)
locale = getenv("LC_CTYPE");
- if (!locale)
+ if (!locale || !*locale)
locale = getenv("LANG");
- if (!locale) {
+ if (!locale || !*locale) {
if (debug_mode)
fprintf(stderr, "Can't detect your locale, fallback to C\n");
locale = "C";
load_compose_table(locale);
- xinerama_init();
- xinerama_query_screens();
-
screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
+ init_dpi();
+
+ randr_init(&randr_base, screen->root);
+ randr_query(screen->root);
+
last_resolution[0] = screen->width_in_pixels;
last_resolution[1] = screen->height_in_pixels;
xcb_change_window_attributes(conn, screen->root, XCB_CW_EVENT_MASK,
(uint32_t[]){XCB_EVENT_MASK_STRUCTURE_NOTIFY});
- if (image_path) {
+ if (verify_png_image(image_path)) {
/* Create a pixmap to render on, fill it with the background color */
img = cairo_image_surface_create_from_png(image_path);
/* In case loading failed, we just pretend no -i was specified. */
image_path, cairo_status_to_string(cairo_surface_status(img)));
img = NULL;
}
- free(image_path);
}
+ free(image_path);
/* Pixmap on which the image is rendered to (if any) */
xcb_pixmap_t bg_pixmap = draw_image(last_resolution);
+ xcb_window_t stolen_focus = find_focused_window(conn, screen->root);
+
/* Open the fullscreen window, already with the correct pixmap in place */
win = open_fullscreen_window(conn, screen, color, bg_pixmap);
xcb_free_pixmap(conn, bg_pixmap);
cursor = create_cursor(conn, screen, win, curs_choice);
/* Display the "locking…" message while trying to grab the pointer/keyboard. */
- pam_state = STATE_PAM_LOCK;
- grab_pointer_and_keyboard(conn, screen, cursor);
+ auth_state = STATE_AUTH_LOCK;
+ if (!grab_pointer_and_keyboard(conn, screen, cursor, 1000)) {
+ DEBUG("stole focus from X11 window 0x%08x\n", stolen_focus);
+
+ /* Set the focus to i3lock, possibly closing context menus which would
+ * otherwise prevent us from grabbing keyboard/pointer.
+ *
+ * We cannot use set_focused_window because _NET_ACTIVE_WINDOW only
+ * works for managed windows, but i3lock uses an unmanaged window
+ * (override_redirect=1). */
+ xcb_set_input_focus(conn, XCB_INPUT_FOCUS_PARENT /* revert_to */, win, XCB_CURRENT_TIME);
+ if (!grab_pointer_and_keyboard(conn, screen, cursor, 9000)) {
+ auth_state = STATE_I3LOCK_LOCK_FAILED;
+ redraw_screen();
+ sleep(1);
+ errx(EXIT_FAILURE, "Cannot grab pointer/keyboard");
+ }
+ }
pid_t pid = fork();
/* The pid == -1 case is intentionally ignored here:
errx(EXIT_FAILURE, "Could not initialize libev. Bad LIBEV_FLAGS?\n");
/* Explicitly call the screen redraw in case "locking…" message was displayed */
- pam_state = STATE_PAM_IDLE;
+ auth_state = STATE_AUTH_IDLE;
redraw_screen();
struct ev_io *xcb_watcher = calloc(sizeof(struct ev_io), 1);
* file descriptor becomes readable). */
ev_invoke(main_loop, xcb_check, 0);
ev_loop(main_loop, 0);
+
+ if (stolen_focus == XCB_NONE) {
+ return 0;
+ }
+
+ DEBUG("restoring focus to X11 window 0x%08x\n", stolen_focus);
+ xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
+ xcb_ungrab_keyboard(conn, XCB_CURRENT_TIME);
+ xcb_destroy_window(conn, win);
+ set_focused_window(conn, screen->root, stolen_focus);
+ xcb_aux_sync(conn);
+
+ return 0;
}
projects / i3 / i3lock / blobdiff