contrib/openpam/lib/pam_set_data.c

   1 /*-
   2  * Copyright (c) 2002-2003 Networks Associates Technology, Inc.
   3  * All rights reserved.
   4  *
   5  * This software was developed for the FreeBSD Project by ThinkSec AS and
   6  * Network Associates Laboratories, the Security Research Division of
   7  * Network Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
   8  * ("CBOSS"), as part of the DARPA CHATS research program.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. The name of the author may not be used to endorse or promote
  19  *    products derived from this software without specific prior written
  20  *    permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $P4: //depot/projects/openpam/lib/pam_set_data.c#15 $
  35  */
  36
  37 #include <stdlib.h>
  38 #include <string.h>
  39
  40 #include <security/pam_appl.h>
  41
  42 #include "openpam_impl.h"
  43
  44 /*
  45  * XSSO 4.2.1
  46  * XSSO 6 page 59
  47  *
  48  * Set module information
  49  */
  50
  51 int
  52 pam_set_data(pam_handle_t *pamh,
  53         const char *module_data_name,
  54         void *data,
  55         void (*cleanup)(pam_handle_t *pamh,
  56                 void *data,
  57                 int pam_end_status))
  58 {
  59         pam_data_t *dp;
  60
  61         ENTERS(module_data_name);
  62         if (pamh == NULL)
  63                 RETURNC(PAM_SYSTEM_ERR);
  64         for (dp = pamh->module_data; dp != NULL; dp = dp->next) {
  65                 if (strcmp(dp->name, module_data_name) == 0) {
  66                         if (dp->cleanup)
  67                                 (dp->cleanup)(pamh, dp->data, PAM_SUCCESS);
  68                         dp->data = data;
  69                         dp->cleanup = cleanup;
  70                         RETURNC(PAM_SUCCESS);
  71                 }
  72         }
  73         if ((dp = malloc(sizeof *dp)) == NULL)
  74                 RETURNC(PAM_BUF_ERR);
  75         if ((dp->name = strdup(module_data_name)) == NULL) {
  76                 FREE(dp);
  77                 RETURNC(PAM_BUF_ERR);
  78         }
  79         dp->data = data;
  80         dp->cleanup = cleanup;
  81         dp->next = pamh->module_data;
  82         pamh->module_data = dp;
  83         RETURNC(PAM_SUCCESS);
  84 }
  85
  86 /*
  87  * Error codes:
  88  *
  89  *      PAM_SYSTEM_ERR
  90  *      PAM_BUF_ERR
  91  */
  92
  93 /**
  94  * The =pam_set_data function associates a pointer to an opaque object
  95  * with an arbitrary string specified by the =module_data_name argument,
  96  * in the PAM context specified by the =pamh argument.
  97  *
  98  * If not =NULL, the =cleanup argument should point to a function
  99  * responsible for releasing the resources associated with the object.
 100  *
 101  * This function and its counterpart =pam_get_data are useful for managing
 102  * data that are meaningful only to a particular service module.
 103  */