/* $NetBSD: openpam_restore_cred.c,v 1.4 2023/06/30 21:46:20 christos Exp $ */ /*- * Copyright (c) 2002-2003 Networks Associates Technology, Inc. * Copyright (c) 2004-2011 Dag-Erling Smørgrav * All rights reserved. * * This software was developed for the FreeBSD Project by ThinkSec AS and * Network Associates Laboratories, the Security Research Division of * Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 * ("CBOSS"), as part of the DARPA CHATS research program. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote * products derived from this software without specific prior written * permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include <sys/cdefs.h> __RCSID("$NetBSD: openpam_restore_cred.c,v 1.4 2023/06/30 21:46:20 christos Exp $"); #include <sys/param.h> #include <grp.h> #include <limits.h> #include <pwd.h> #include <stdlib.h> #include <unistd.h> #include <security/pam_appl.h> #include "openpam_impl.h" #include "openpam_cred.h" /* * OpenPAM extension * * Restore credentials */ int openpam_restore_cred(pam_handle_t *pamh) { const struct pam_saved_cred *scred; const void *scredp; int r; ENTER(); r = pam_get_data(pamh, PAM_SAVED_CRED, &scredp); if (r != PAM_SUCCESS) RETURNC(r); if (scredp == NULL) RETURNC(PAM_SYSTEM_ERR); scred = scredp; if (scred->euid != geteuid()) { if (seteuid(scred->euid) < 0 || setgroups(scred->ngroups, scred->groups) < 0 || setegid(scred->egid) < 0) RETURNC(PAM_SYSTEM_ERR); } pam_set_data(pamh, PAM_SAVED_CRED, NULL, NULL); RETURNC(PAM_SUCCESS); } /* * Error codes: * * =pam_get_data * PAM_SYSTEM_ERR */ /** * The =openpam_restore_cred function restores the credentials saved by * =openpam_borrow_cred. * * >setegid 2 * >seteuid 2 * >setgroups 2 */ |