Home | History | Annotate | Line # | Download | only in libpam 
      1 /*	$NetBSD: pam_set_data.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_set_data.c,v 1.4 2023/06/30 21:46:21 christos Exp $");
     44 
     45 #include <stdlib.h>
     46 #include <string.h>
     47 
     48 #include <security/pam_appl.h>
     49 
     50 #include "openpam_impl.h"
     51 
     52 /*
     53  * XSSO 4.2.1
     54  * XSSO 6 page 59
     55  *
     56  * Set module information
     57  */
     58 
     59 int
     60 pam_set_data(pam_handle_t *pamh,
     61 	const char *module_data_name,
     62 	void *data,
     63 	void (*cleanup)(pam_handle_t *pamh,
     64 		void *data,
     65 		int pam_end_status))
     66 {
     67 	pam_data_t *dp;
     68 
     69 	ENTERS(module_data_name);
     70 	for (dp = pamh->module_data; dp != NULL; dp = dp->next) {
     71 		if (strcmp(dp->name, module_data_name) == 0) {
     72 			if (dp->cleanup)
     73 				(dp->cleanup)(pamh, dp->data, PAM_SUCCESS);
     74 			dp->data = data;
     75 			dp->cleanup = cleanup;
     76 			RETURNC(PAM_SUCCESS);
     77 		}
     78 	}
     79 	if ((dp = malloc(sizeof *dp)) == NULL)
     80 		RETURNC(PAM_BUF_ERR);
     81 	if ((dp->name = strdup(module_data_name)) == NULL) {
     82 		FREE(dp);
     83 		RETURNC(PAM_BUF_ERR);
     84 	}
     85 	dp->data = data;
     86 	dp->cleanup = cleanup;
     87 	dp->next = pamh->module_data;
     88 	pamh->module_data = dp;
     89 	RETURNC(PAM_SUCCESS);
     90 }
     91 
     92 /*
     93  * Error codes:
     94  *
     95  *	PAM_SYSTEM_ERR
     96  *	PAM_BUF_ERR
     97  */
     98 
     99 /**
    100  * The =pam_set_data function associates a pointer to an opaque object
    101  * with an arbitrary string specified by the =module_data_name argument,
    102  * in the PAM context specified by the =pamh argument.
    103  *
    104  * If not =NULL, the =cleanup argument should point to a function
    105  * responsible for releasing the resources associated with the object.
    106  *
    107  * This function and its counterpart =pam_get_data are useful for managing
    108  * data that are meaningful only to a particular service module.
    109  *
    110  * >openpam_free_data
    111  */
    112