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      1 /*	$NetBSD: pam_end.c,v 1.4 2023/06/30 21:46:21 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
      5  * Copyright (c) 2004-2017 Dag-Erling Smrgrav
      6  * All rights reserved.
      7  *
      8  * This software was developed for the FreeBSD Project by ThinkSec AS and
      9  * Network Associates Laboratories, the Security Research Division of
     10  * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
     11  * ("CBOSS"), as part of the DARPA CHATS research program.
     12  *
     13  * Redistribution and use in source and binary forms, with or without
     14  * modification, are permitted provided that the following conditions
     15  * are met:
     16  * 1. Redistributions of source code must retain the above copyright
     17  *    notice, this list of conditions and the following disclaimer.
     18  * 2. Redistributions in binary form must reproduce the above copyright
     19  *    notice, this list of conditions and the following disclaimer in the
     20  *    documentation and/or other materials provided with the distribution.
     21  * 3. The name of the author may not be used to endorse or promote
     22  *    products derived from this software without specific prior written
     23  *    permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     35  * SUCH DAMAGE.
     36  */
     37 
     38 #ifdef HAVE_CONFIG_H
     39 # include "config.h"
     40 #endif
     41 
     42 #include <sys/cdefs.h>
     43 __RCSID("$NetBSD: pam_end.c,v 1.4 2023/06/30 21:46:21 christos Exp $");
     44 
     45 #include <stdlib.h>
     46 
     47 #include <security/pam_appl.h>
     48 
     49 #include "openpam_impl.h"
     50 
     51 /*
     52  * XSSO 4.2.1
     53  * XSSO 6 page 42
     54  *
     55  * Terminate the PAM transaction
     56  */
     57 
     58 int
     59 pam_end(pam_handle_t *pamh,
     60 	int status)
     61 {
     62 	pam_data_t *dp;
     63 	int i;
     64 
     65 	ENTER();
     66 	if (pamh == NULL)
     67 		RETURNC(PAM_BAD_HANDLE);
     68 
     69 	/* clear module data */
     70 	while ((dp = pamh->module_data) != NULL) {
     71 		if (dp->cleanup)
     72 			(dp->cleanup)(pamh, dp->data, status);
     73 		pamh->module_data = dp->next;
     74 		FREE(dp->name);
     75 		FREE(dp);
     76 	}
     77 
     78 	/* clear environment */
     79 	while (pamh->env_count) {
     80 		--pamh->env_count;
     81 		FREE(pamh->env[pamh->env_count]);
     82 	}
     83 	FREE(pamh->env);
     84 
     85 	/* clear chains */
     86 	openpam_clear_chains(pamh->chains);
     87 
     88 	/* clear items */
     89 	for (i = 0; i < PAM_NUM_ITEMS; ++i)
     90 		pam_set_item(pamh, i, NULL);
     91 
     92 	FREE(pamh);
     93 
     94 	RETURNC(PAM_SUCCESS);
     95 }
     96 
     97 /*
     98  * Error codes:
     99  *
    100  *	PAM_BAD_HANDLE
    101  */
    102 
    103 /**
    104  * The =pam_end function terminates a PAM transaction and destroys the
    105  * corresponding PAM context, releasing all resources allocated to it.
    106  *
    107  * The =status argument should be set to the error code returned by the
    108  * last API call before the call to =pam_end.
    109  */
    110