first commit

1 files changed, 288 insertions, 0 deletions

diff --git a/src/test-passwd.c.orig b/src/test-passwd.c.orig
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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;
+}