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authorPerberos <[email protected]>2011-11-04 22:16:15 -0300
committerPerberos <[email protected]>2011-11-04 22:16:15 -0300
commitfff4ecc82f2bcfa7427596e7ad9c3769fcab040b (patch)
treeac4f1812a7991609c9c32c776daede2d8492f7b5 /src/test-passwd.c
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diff --git a/src/test-passwd.c b/src/test-passwd.c
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+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2005-2006 William Jon McCann <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Authors: William Jon McCann <[email protected]>
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <termios.h>
+
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+
+#include "gs-auth.h"
+#include "setuid.h"
+
+/* Initializations that potentially take place as a priveleged user:
+ If the executable is setuid root, then these initializations
+ are run as root, before discarding privileges.
+*/
+static gboolean
+privileged_initialization (void)
+{
+ gboolean ret;
+ char *nolock_reason;
+ char *orig_uid;
+ char *uid_message;
+
+#ifndef NO_LOCKING
+ /* before hack_uid () for proper permissions */
+ gs_auth_priv_init ();
+#endif /* NO_LOCKING */
+
+ ret = hack_uid (&nolock_reason,
+ &orig_uid,
+ &uid_message);
+ if (nolock_reason)
+ {
+ g_warning ("Locking disabled: %s", nolock_reason);
+ }
+ if (uid_message && gs_auth_get_verbose ())
+ {
+ g_print ("Modified UID: %s", uid_message);
+ }
+
+ g_free (nolock_reason);
+ g_free (orig_uid);
+ g_free (uid_message);
+
+ return ret;
+}
+
+
+/* Figure out what locking mechanisms are supported.
+ */
+static gboolean
+lock_initialization (char **nolock_reason)
+{
+ if (nolock_reason)
+ {
+ *nolock_reason = NULL;
+ }
+
+#ifdef NO_LOCKING
+ if (nolock_reason)
+ {
+ *nolock_reason = g_strdup ("not compiled with locking support");
+ }
+ return FALSE;
+#else /* !NO_LOCKING */
+
+ /* Finish initializing locking, now that we're out of privileged code. */
+ if (! gs_auth_init ())
+ {
+ if (nolock_reason)
+ {
+ *nolock_reason = g_strdup ("error getting password");
+ }
+ return FALSE;
+ }
+
+ /* If locking is currently enabled, but the environment indicates that
+ we have been launched as MDM's "Background" program, then disable
+ locking just in case.
+ */
+ if (getenv ("RUNNING_UNDER_MDM"))
+ {
+ if (nolock_reason)
+ {
+ *nolock_reason = g_strdup ("running under MDM");
+ }
+ return FALSE;
+ }
+
+ /* If the server is XDarwin (MacOS X) then disable locking.
+ (X grabs only affect X programs, so you can use Command-Tab
+ to bring any other Mac program to the front, e.g., Terminal.)
+ */
+ {
+ gboolean macos = FALSE;
+
+#ifdef __APPLE__
+ /* Disable locking if *running* on Apple hardware, since we have no
+ reliable way to determine whether the server is running on MacOS.
+ Hopefully __APPLE__ means "MacOS" and not "Linux on Mac hardware"
+ but I'm not really sure about that.
+ */
+ macos = TRUE;
+#endif
+
+ if (macos)
+ {
+ if (nolock_reason)
+ {
+ *nolock_reason = g_strdup ("Cannot lock securely on MacOS X");
+ }
+ return FALSE;
+ }
+ }
+
+#endif /* NO_LOCKING */
+
+ return TRUE;
+}
+
+static char *
+request_password (const char *prompt)
+{
+ char buf [255];
+ char *pass;
+ char *password;
+ struct termios ts0;
+ struct termios ts1;
+
+ tcgetattr (fileno (stdin), &ts0);
+ ts1 = ts0;
+ ts1.c_lflag &= ~ECHO;
+
+ printf ("%s", prompt);
+
+ if (tcsetattr (fileno (stdin), TCSAFLUSH, &ts1) != 0)
+ {
+ fprintf (stderr, "Could not set terminal attributes\n");
+ exit (1);
+ }
+
+ pass = fgets (buf, sizeof (buf) - 1, stdin);
+
+ tcsetattr (fileno (stdin), TCSANOW, &ts0);
+
+ if (!pass || !*pass)
+ {
+ exit (0);
+ }
+
+ if (pass [strlen (pass) - 1] == '\n')
+ {
+ pass [strlen (pass) - 1] = 0;
+ }
+
+ password = g_strdup (pass);
+
+ memset (pass, '\b', strlen (pass));
+
+ return password;
+}
+
+static gboolean
+auth_message_handler (GSAuthMessageStyle style,
+ const char *msg,
+ char **response,
+ gpointer data)
+{
+ gboolean ret;
+
+ g_message ("Got message style %d: '%s'", style, msg);
+
+ ret = TRUE;
+
+ switch (style)
+ {
+ case GS_AUTH_MESSAGE_PROMPT_ECHO_ON:
+ break;
+ case GS_AUTH_MESSAGE_PROMPT_ECHO_OFF:
+ {
+ char *password;
+ password = request_password (msg);
+ *response = password;
+ }
+ break;
+ case GS_AUTH_MESSAGE_ERROR_MSG:
+ break;
+ case GS_AUTH_MESSAGE_TEXT_INFO:
+ break;
+ default:
+ g_assert_not_reached ();
+ }
+
+ return ret;
+}
+
+int
+main (int argc,
+ char **argv)
+{
+ GError *error = NULL;
+ gboolean verbose = TRUE;
+ char *nolock_reason = NULL;
+
+#ifdef ENABLE_NLS
+ bindtextdomain (GETTEXT_PACKAGE, MATELOCALEDIR);
+# ifdef HAVE_BIND_TEXTDOMAIN_CODESET
+ bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
+# endif
+ textdomain (GETTEXT_PACKAGE);
+#endif
+
+ if (! g_thread_supported ())
+ {
+ g_thread_init (NULL);
+ }
+
+ gs_auth_set_verbose (verbose);
+ if (! privileged_initialization ())
+ {
+ exit (1);
+ }
+
+ if (! gtk_init_with_args (&argc, &argv, NULL, NULL, NULL, &error))
+ {
+ fprintf (stderr, "%s", error->message);
+ g_error_free (error);
+ exit (1);
+ }
+
+ if (! lock_initialization (&nolock_reason))
+ {
+ if (nolock_reason)
+ {
+ g_warning ("Screen locking disabled: %s", nolock_reason);
+ g_free (nolock_reason);
+ }
+
+ exit (1);
+ }
+
+again:
+ error = NULL;
+
+ if (gs_auth_verify_user (g_get_user_name (), g_getenv ("DISPLAY"), auth_message_handler, NULL, &error))
+ {
+ printf ("Correct!\n");
+ }
+ else
+ {
+ if (error != NULL)
+ {
+ fprintf (stderr, "ERROR: %s\n", error->message);
+ g_error_free (error);
+ }
+ printf ("Incorrect\n");
+ goto again;
+ }
+
+ return 0;
+}